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    • 专利摘要:
    The invention relates to a part (10) for a timepiece, a movement and a timepiece and a method of manufacturing a part for a timepiece. An escape wheel part (10) which is an example of a part for a timepiece is made of an inorganic polymeric material containing an inorganic element (Me) and oxygen (O). It is preferable that the molar ratio of inorganic element (Me) to oxygen (O) (Me: O) is from 1: 2 to 1: 1. The part for a timepiece is obtained, for example, by heating a mixture comprising a compound including in an inorganic element (Me) and an alkoxyl group, water and a catalyst, thereby obtaining a solution, and then by hardening the solution obtained by heating.
    公开号:CH717221A2
    申请号:CH00262/21
    申请日:2021-03-11
    公开日:2021-09-15
    发明作者:Nakamura Takahiko
    申请人:Seiko Watch Kk；
    IPC主号:
    专利说明:

    [Technical area]
    The present invention relates to a part for a timepiece, a method for the production thereof, a movement and a timepiece.
    [Prior art]
    A part constituting a watch is generally obtained by the treatment of a metallic material such as carbon steel or brass. It is known that reducing the weight or demagnetizing a part is effective as a method of improving the precision of a timepiece.
    [0003] For example, patent document 1 discloses a part, in which the base of the body is made of monocrystalline silicon which is a light non-metallic material, and its entire surface is covered with a film of an alloy of metal and silicon or a lamination film of an oxide layer and an alloy layer.
    [Prior art document]
    [Patent document]
    [0004] [Patent document 1] JP-A-2009-79234
    [Summary of the invention]
    [Problems solved by the invention]
    [0005] However, silicon is a brittle material, and therefore, when silicon is used as a part for a timepiece, as described in patent document 1, it is necessary to cover the surface of the compound base body silicon with a film of an alloy or with a lamination film of an oxide layer and an alloy layer, and it takes time and labor.
    [0006] Therefore, a part for a timepiece which allows weight reduction and demagnetization as a substitute for a silicon part is in demand.
    [0007] One aspect of the present invention is to provide a part for a timepiece, a movement and a timepiece allowing weight reduction and demagnetization.
    Another aspect of the present invention is to provide a method of producing a part for a timepiece capable of easily producing a part for a timepiece allowing weight reduction and demagnetization.
    [Means of problem solving]
    One aspect of the present invention provides a part for a timepiece composed of an inorganic polymeric material containing an inorganic element (Me) and oxygen (O).
    [0010] According to this aspect, weight reduction and demagnetization can be achieved.
    It is preferable that the molar ratio of the inorganic element (Me) to oxygen (O) (Me: O) is from 1: 2 to 1: 1.
    [0012] According to this aspect, the inorganic polymer material has moderate hardness. Therefore, the part for a timepiece of the present invention can be optimally used as a part required to have a certain degree of hardness, for example, an escape wheel part or an anchor body.
    [0013] It is preferable that the inorganic polymeric material further contains an alkyl group.
    [0014] It is preferable that the inorganic polymeric material further contains a fluororesin.
    [0015] According to this aspect, the fluororesin is easily exposed to the surface of the part for a timepiece in the event of slipping, and the wear resistance is improved.
    [0016] It is preferable that the inorganic polymeric material further contains an inorganic powder.
    [0017] It is preferable that the inorganic powder is dispersed at equal intervals in the inorganic polymer material.
    [0018] According to this aspect, a sol-gel reaction zone can be reduced, and therefore, the amount of shrinkage during molding (during curing of a solution) can be reduced, and a dent mark can be. deleted. In particular, when the inorganic powder is dispersed at equal intervals in the inorganic polymer material, a specific wavelength of light is reflected according to Bragg's law, and the part for a timepiece appears colored, and therefore, the appearance is improved.
    [0019] It is preferable that the inorganic polymeric material further contains a colorant.
    [0020] According to this aspect, the part for a timepiece is colored, and therefore, the appearance is improved.
    It is preferable that the inorganic polymer material is colorless and transparent.
    [0022] The part for a timepiece may be an insert molded product.
    When the inorganic polymer material is colorless and transparent, the part for a timepiece of the present invention can also be used, for example, as a part for a mystery watch.
    One aspect of the present invention provides a movement including the part for a timepiece.
    According to this aspect, the movement includes the part for a timepiece, and therefore is light.
    One aspect of the present invention provides a timepiece including the movement.
    According to this aspect, the timepiece includes the part for a timepiece, and therefore is light.
    [0028] In one aspect, the present invention provides a method of producing a part for a timepiece including heating a mixture containing a compound including an inorganic element (Me) and an alkoxy group, water, and a catalyst, thereby obtaining a solution, and then hardening of the solution obtained by heating.
    According to this aspect, a part for a timepiece which allows weight reduction and demagnetization can be easily produced.
    [0030] It is preferable that the mixture additionally contains a fluororesin.
    [0031] According to this aspect, the fluororesin is easily exposed on the surface of the part for a timepiece in the event of slippage, and the wear resistance is improved.
    [0032] It is preferable that the mixture additionally contains an inorganic powder.
    It is preferable that the inorganic powder is dispersed at equal intervals in the mixture.
    [0034] According to this aspect, a sol-gel reaction zone can be reduced, and therefore, the amount of shrinkage during molding (during curing of a solution) can be reduced, and a dent mark can be. deleted. In particular, when the inorganic powder is dispersed at equal intervals in the mixture, a specific wavelength of light is reflected according to Bragg's law, and the part for a timepiece appears colored, and therefore, the appearance is improved.
    [0035] It is preferable that the mixture additionally contains a colorant.
    [0036] In this aspect, the part for a timepiece is colored, and therefore, the appearance is improved.
    [Advantage of the invention]
    According to one aspect of the present invention, a part for a timepiece, a movement, and a timepiece allowing weight reduction and demagnetization can be provided.
    According to another aspect of the present invention, a method of producing a part for a timepiece capable of easily producing a part for a timepiece allowing weight reduction and demagnetization can be provided.
    [Brief description of the drawings]
    [0039] [FIG. 1] Fig. 1 is a perspective view showing a shape of an escape wheel part which is an example of a part for a timepiece according to the present invention. [FIG. 2] Fig. 2 is a perspective view showing one form of an anchor body which is another example of a part for a timepiece according to the present invention.
    [Mode for carrying out the invention]
    [Piece for a timepiece]
    A part for a timepiece according to one aspect of the present invention is composed of an inorganic polymer material containing an inorganic element (Me) and oxygen (O). Since the part for a timepiece is made of the inorganic polymeric material, weight reduction and demagnetization can be achieved. In addition, the part also has excellent weather resistance compared to a part for a timepiece made of an organic material such as plastic.
    [0041] It should be noted that the term "polymer" as used herein means that the mass average molecular weight is 5,000 or more. The weight average molecular weight of the inorganic polymeric material is preferably 10,000 or more, and more preferably 100,000 or more.
    [0042] The molar ratio of inorganic element (Me) to oxygen (O) (Me: O) in the inorganic polymeric material is preferably from 1: 2 to 2: 1. When the molar ratio is within the above range, the inorganic polymeric material has moderate hardness. Therefore, the part for a timepiece of the present invention can be optimally used as a part required to have a certain degree of hardness, for example, an escape wheel part or an anchor body.
    Examples of the inorganic element (Me) in the inorganic polymeric material include silicon (Si), aluminum (Al), titanium (Ti), and zirconium (Zr). Among these elements, from the point of view of the inorganic polymer material becoming colorless and transparent, silicon and aluminum are preferred.
    When the inorganic polymer material is colorless and transparent, the part for a timepiece can also be used, for example, as a part for a mystery watch.
    [0045] Here, the term "colorless and transparent" means that it is colorless and has transmittance for light at least in a part of the spectrum of the wavelengths of light in the spectrum of visible light.
    [0046] The inorganic polymeric material may further contain an alkyl group.
    Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a t-butyl group, a pentyl group, a hexyl group. , and an octyl group.
    As an inorganic polymeric material, a compound comprising one or more types of structural units selected from the group comprising a structural unit (1) represented by the following molecular formula (1), a structural unit (2) represented by the formula following molecular formula (2), a structural unit (3) represented by the following molecular formula (3), a structural unit (4) represented by the following molecular formula (4), and a structural unit (5) represented by the molecular formula following (5) is used.- (MeO2) - (1)- (Me2R <1> 2O3) - (2)- (Me4R <2> 6R <3> O4) - (3)- (MenR <4> (2n-2) R <5> On) - (4)- (MeR <6> 2O) - (5)
    In molecular formulas (1) to (5), Me is an inorganic element, and O is the oxygen element.
    In molecular formula (2), R <1> is a group of monovalent hydrocarbons. In molecular formula (2), two R <1> may be the same or different.
    In molecular formula (3), R <2> is a group of monovalent hydrocarbons and R <3> is a divalent linking group. In molecular formula (3), six R <2> may be the same or different.
    In molecular formula (4), R <4> is a group of monovalent hydrocarbons and R <5> is a divalent linking group. n is a number from 2 to 100. In molecular formula (4), (2n-2) number of R <4> may be the same or different.
    In molecular formula (5), R <6> is a group of monovalent hydrocarbons. In molecular formula (5), two R <6> may be the same or different.
    Examples of each of the hydrocarbon groups among R <1>, R <2>, R <4>, and R <6> include an alkyl group and an aryl group.
    The number of carbon atoms of the alkyl group is preferably 1 to 18, more preferably 1 to 14, even more preferably 1 to 10, and particularly preferably 1 to 8.
    The number of carbon atoms of the aryl group is preferably 6 to 10, and more preferably 6 to 8.
    As the number of carbon atoms of the hydrocarbon group of R <1>, R <2>, R <4>, and R <6> increases, the inorganic polymeric material becomes soft, and tends to to be barely cracked.
    Examples of each linking group among R <3> and R <5> include a group of divalent hydrocarbons.
    Examples of the group of divalent hydrocarbons include an alkylene group and an arylene group.
    The number of carbon atoms of the alkylene group is preferably 2 to 18, more preferably 2 to 14, even more preferably 2 to 10, and particularly preferably 2 to 8.
    The number of carbon atoms of the arylene group is preferably 6 to 10, and more preferably 6 to 8.
    [0062] The inorganic polymeric material can be a compound comprising only any one structural unit from among structural units (1) to (5) or a compound comprising two or more structural units from among structural units (1) to (5) . Further, the inorganic polymeric material may be a mixture of compounds comprising one or more structural units from among structural units (1) to (5).
    [0063] The inorganic polymeric material may further contain a fluororesin.
    When the inorganic polymeric material further contains a fluororesin, the fluororesin is easily exposed on the workpiece surface for a timepiece in the event of slipping, and the wear resistance is improved.
    Examples of fluororesin include homopolymers or copolymers of a fluorine-based monomer such as tetrafluoroethylene (TFE), hexafluoropropylene (HFP), vinylidene fluoride (VDF), vinyl fluoride, or a perfluoroalkyl vinyl ether, and copolymers such as a fluorine-based monomer and an olefin. Among these, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), tetrafluoroethylene-ethylene copolymer (ETFE), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), and a Tetrafluoroethylene-hexafluoropropylene (FEP) copolymer are preferred.
    Among these fluororesins, only one type can be used or two or more types can be used in combination.
    [0067] The fluororesin can be in a powder form or a liquid form, but is preferably in a powder form from the standpoint of ease of uniformly dispersing.
    When the fluororesin is in powder form, the average particle diameter of the fluororesin is preferably from 0.1 to 1 μm, and more preferably from 0.2 to 0.3 μm.
    The content of the fluororesin relative to the total mass of the inorganic polymer material is preferably from 1 to 50% by weight, and more preferably from 20 to 30% by weight. When the content of the fluororesin is beyond the lower limit, the wear resistance is further improved further. When the content of fluororesin is at the upper limit or less, the reaction during curing proceeds smoothly, and it becomes easy to obtain the part for a timepiece in a state where the fluororesin is dispersed.
    [0070] The inorganic polymer material may further contain an inorganic powder.
    Although the details are described below, the part for a timepiece can be produced by a sol-gel method. When the inorganic polymeric material further contains an inorganic powder, a sol-gel reaction zone can be reduced, and therefore, the amount of shrinkage during molding (during curing of a solution) can be reduced. Therefore, a dent mark, i.e., dent or depression generated by the shrinkage of the surface of a molded product can be suppressed.
    The inorganic powder is preferably dispersed at equal intervals in the inorganic polymer material, that is to say, in the part for a timepiece.
    When the inorganic powder is dispersed at equal intervals, a specific wavelength of light is reflected according to Bragg's law, and the part for a timepiece appears colored, and therefore, the appearance is improved. .
    Here, the phrase "dispersed at equal intervals" means that when the part for a timepiece is observed at a given cross section, the inorganic powder is present at equal intervals over the cross section.
    Examples of inorganic powder include glass powder; a ceramic powder of alumina, magnesia, calcia, cordierite, silica, mulite, zircon, zirconia, titania, or similar powders; and a metallic powder of gold, silver, copper, aluminum, silicon, or the like, which is a diamagnetic or similar material. Among them, glass powder and ceramic powder are preferred, and silica is more preferred.
    Among these inorganic powders, only one type can be used or two or more types can be used in combination.
    [0077] The inorganic powder may be in a spherical or other shape, but is preferably in a spherical shape from the point of view of the ease of uniformly dispersing.
    The average diameter of the particles of the inorganic powder is preferably from 0.01 to 20 μm, and more preferably from 0.2 to 0.5 μm.
    From the point of view of reduction in the amount of shrinkage during molding, the content of the inorganic powder relative to the total mass of the inorganic polymer material is preferably 1 to 50% of the mass, and more preferably 20 to 30% of the mass. When the content of the inorganic powder is beyond the lower limit, the amount of shrinkage during molding can be sufficiently reduced. When the content of the inorganic powder is at the upper limit or less, although the details are described later, the mixture (M) is less likely to become hard, and a solution obtained by heating the mixture (M) can be easily introduced into a molding die.
    From the point of view of dispersion of the inorganic powder at equal intervals, the content of the inorganic powder relative to the total mass of the inorganic polymer material is preferably from 0.1 to 50% of the mass, and more preferably from 20 to 40% of the mass. When the content of the inorganic powder is beyond the lower limit or more, light reflection is observed in at least a portion of the workpiece for a timepiece, and the appearance due to coloring is improved. . When the content of the inorganic powder is at the upper limit or less, the mixture (M) is less likely to become hard, and a solution obtained by heating the mixture (M) can be easily filled into a molding die.
    [0081] The inorganic polymeric material may further contain a colorant.
    When the inorganic polymeric material further contains a dye, the part for a timepiece is colored, and therefore the appearance is improved. The part for a timepiece can be colored in various colors depending on the type of dye or its combination. In addition, the hue can also be controlled according to the content of the dye.
    Examples of the colorant include a pigment and a dye other than the aforementioned inorganic powders. Of these dyes, one type can be used alone or two or more types can be used in combination.
    Examples of the pigment include inorganic pigments such as yellow earth, barium yellow, Prussian blue, cadmium red, barium sulfate, iron oxide red, iron black, and carbon black; organic pigments such as copper phthalocyanine blue, copper phthalocyanine green, anthraquinone, quinacridone, indigoid, benzidine yellow, and naphthol red; a fluorescent inorganic pigment which contains an oxide or a sulfide or the like of a metal such as zinc, cadmium, calcium, aluminum, or yttrium as the main component, and which is obtained by adding a minute amount of an activator such as manganese, silver, copper, or lead thereto, followed by firing at an elevated temperature (specifically, CaS: Bi, CaO: Zn, ZnS: Cu, ZnS: Mn, ZnS: Ag, or the like); and a fluorescent organic pigment in which a fluorescent dye is solidissolved in a resin matrix of an acrylic resin, a vinyl chloride resin, or the like. Among them, fluorescent inorganic pigment and fluorescent organic pigment are preferred.
    Among these pigments, only one type can be used or two or more types can be used in combination.
    Examples of tincture include natural tinctures such as carotene, flavone, flavonol, chalcone, naphthoquinone, anthraquinone, tannin, indigo, benzobyran, caramel color, gardenia tincture, anthocyanin dye, annatto tincture , a paprika tincture, a safflower tincture, a monascus tincture, a flavonoid dye, and a cochineal tincture; synthetic dyes such as aniline black, naphthoquinone dye, indigo dye, nigrosine dye, phthalocyanine dye, polymethine dye, and tar dye (eg, amaranth, erythrosine, Allura Red AC, Nouvelle Coccine , Phloxine, Rose Bengal, Acid Red, Tartrazine, Sunset Yellow FCF, Fast Green FCF, Brilliant Blue FCF, Indigo Carmine, or similar); and fluorescent dyes such as merocyanine, perylene, acridine, luciferin, pyranine, stilbene, rhodamine, coumarin, pyrromethene, fluorescein, and umbelliferone. Of these, a fluorescent dye is preferred.
    Of these dyes, only one type can be used or two or more types can be used in combination.
    The content of the dye relative to the total mass of the inorganic polymer material is preferably by mass from 0.1 to 10,000ppm, and more preferably by mass from 100 to 300ppm. When the content of the dye is at the lower limit or more, the appearance due to the coloring is further improved. When the content of the dye is at the upper limit or less, the transparency is hardly deteriorated.
    Specific examples of parts for a timepiece composed of the aforementioned inorganic polymer material include an escape wheel part constituting an escapement mobile, and an anchor body constituting an anchor.
    An escape wheel piece 10represented in FIG. 1 includes an annular rim 11, a hub 12 disposed inside the rim 11, and a plurality of arms 13, each of them connecting the rim 11 to the hub 12. The hub 12 is in the form of a disc. Each arm 13 extends radially towards the inner circumferential edge of the rim 11 from the outer circumferential edge of the hub 12. On the outer circumferential face of the rim 11, a plurality of tooth portions 14 formed in a special hook shape are arranged. projecting outward in the radial direction.
    It should be noted that the escapement mobile includes the escape wheel part 10 and a shaft element (not shown) fixed co-axially to the escape wheel part 10.
    An anchor body 20 shown in Figure 2 is formed in a T shape with three anchor beams 21.
    It should be noted that an anchor comprises the anchor body 20, an anchor pin (not shown) fixed to the anchor body 20, a planned pallet (not shown) fixed to the end of each of the two anchor arms 21 among the three anchor arms 21, and a pallet receptacle (not shown) fixed to the end of the remaining anchor arm 21.
    [0094] In addition, the part for a timepiece can also be used favorably as a part, for example, of a barrel wheel, a center mobile, a third mobile, a fourth mobile, or the like.
    The thickness of the part for a timepiece is not particularly limited, but is preferably 100 to 200 μm from the point of view of weight reduction.
    [Method of producing a part for a timepiece]
    The part for a timepiece can be produced, for example, according to a sol-gel method. More precisely, a mixture (M) containing a compound (X) including an inorganic element (Me) and an alkoxy group, water, and a catalyst is heated, thereby obtaining a sol, and subsequently the obtained solution is transformed into a desired shape by heating, where the part for a timepiece composed of an inorganic polymeric material which is a solution hardened material is produced.
    The mixture (M) may further contain one or more of the aforementioned fluororesin, inorganic powder and colorant as required.
    The mixture (M) is obtained by mixing the compound (X), water, and a catalyst, and as needed, one or more of fluororesin, an inorganic powder and a colorant. In mixing the respective components, a device such as a mixer, a mixing rotor, a mixer or an ultrasonic disperser can be used. In particular, in order to disperse the inorganic powder or the like at equal intervals in the mixture (M), it is preferable to use an ultrasonic disperser. Examples of the ultrasonic disperser include a homogenizer.
    The compound (X) is a raw material of the inorganic polymer material.
    [0100] Examples of the compound (X) include an alkoxysilane, an aluminum alkoxide, a titanium alkoxide, and a zirconium alkoxide.
    [0101] Examples of the alkoxysilane include monoalkoxysilanes such as trimethylmethoxysilane and trimethylethoxysilane; dialkoxysilanes such as dimethoxydimethylsilane, dimethyldiethoxysilane, diethoxymethylsilane, and diethoxymethylvinylsilane; trialkoxysilanes such as methyltrimethoxysilane, methyltriethoxysilane, and octyltriethoxysilane; and tetraalkoxysilanes such as tetramethoxysilane and tetraethoxysilane.
    [0102] Examples of aluminum alkoxide include aluminum ethoxide.
    [0103] Examples of titanium alkoxide include titanium tetraethoxide.
    [0104] Examples of zirconium alkoxide include zirconium ethoxide.
    [0105] Among these, from the point of view of obtaining a part for a timepiece in which the inorganic polymer material is colorless and transparent, an alkoxysilane and an aluminum alkoxide are preferred.
    [0106] Among these compounds (X), only one type can be used or two or more types can be used in combination.
    [0107] Examples of the catalyst include acids such as acetic acid, hydrochloric acid, and nitric acid; and alkalis such as sodium hydroxide and potassium hydroxide.
    [0108] Among these catalysts, only one type can be used or two or more types can be used in combination.
    [0109] The ratio of water in the mixture (M) is not particularly limited as long as the amount is such that all of the alkoxy groups in the compound (X) can be hydrolyzed, however, for example, the molar ratio of compound (X) to water (X: water) is preferably from 10: 5 to 10:40, and more preferably from 10:10 to 10:20.
    [0110] The ratio of the catalyst in the mixture (M) is not particularly limited as long as it corresponds to a catalytic amount, however, for example, the molar ratio of the compound (X) to the catalyst (X: catalyst) is preferably 10: 0.1 to 10:10, and more preferably 10: 1 to 10: 2.
    When the mixture (M) contains a fluororesin, the ratio of the fluororesin in the mixture (M) relative to the total mass of the mixture (M) excluding water and the catalyst is preferably from 1 to 50% of mass, and more preferably 20-30% by mass. When the content of the fluororesin is at the lower limit or more, the wear resistance is further improved. When the content of fluororesin is at the upper limit or less, the reaction during curing proceeds smoothly, and it becomes easy to obtain the part for a timepiece in a state where the fluororesin is dispersed.
    [0112] When the mixture (M) contains an inorganic powder, from the point of view of the reduction in the amount of shrinkage during molding, the ratio of the inorganic powder in the mixture (M) relative to the total mass of the mixture (M) excluding water and the catalyst is preferably 1 to 50% by weight, and more preferably 20 to 30% by weight. When the content of the inorganic powder is at the lower limit or more, the amount of shrinkage during molding can be sufficiently reduced. When the content of the inorganic powder is at the upper limit or less, the mixture (M) is less likely to become hard, and a solution to be obtained by heating the mixture (M) can be easily filled in a molding die.
    From the point of view of the dispersion of the inorganic powder at equal intervals, the ratio of the inorganic powder in the mixture (M) relative to the total mass of the mixture (M) excluding the water and the catalyst is preferably 0.1 to 50% by weight, and more preferably 20 to 40% by weight. When the content of the inorganic powder is at the lower limit or more, light reflection is observed in at least a portion of the workpiece for a timepiece, and the appearance due to coloring is improved. When the content of the inorganic powder is at the upper limit or less, the mixture (M) is less likely to become hard, and a solution obtained by heating the mixture (M) can be easily introduced into a molding die.
    When the mixture (M) contains a dye, the ratio of the dye in the mixture (M) relative to the total mass of the mixture (M) excluding water and the catalyst is preferably by mass from 0.1 to 10,000 ppm, and more preferably by mass from 100 to 300 ppm. When the content of the dye is at the lower limit or more, the appearance due to the coloring is further improved. When the content of the dye is at the upper limit or less, the transparency is hardly deteriorated.
    [0115] The heating of the mixture (M) is preferably carried out in a sealed system in order to avoid evaporation of the water until all the alkoxy groups in the compound (X) are hydrolyzed. When the alkoxy group in the compound (X) is hydrolyzed, an alcohol is generated. This alcohol sometimes causes cracking during curing, and therefore is preferably removed before curing. Accordingly, it is preferable to further perform heat treatment in an open system (second heating step) after heating in the sealed system (first heating step).
    In the first heating step, the heating temperature is preferably 50 to 100 ° C, and the heating time is preferably 30 minutes to 24 hours.
    [0117] In the second heating step, the heating temperature is preferably 80 to 120 ° C, and the heating time is preferably 1 to 24 hours.
    By heating the mixture (M), all the alkoxy groups in the compound (X) are hydrolyzed, which makes it possible to obtain a solution.
    [0119] The mass average molecular weight of the obtained solution is preferably 5,000 or more, more preferably 10,000 or more, and even more preferably 100,000 or more.
    [0120] The mass average molecular weight of the solution is a value in terms of standard polystyrene measured by gel permeation chromatography (GPC).
    [0121] It should be noted that the mass average molecular weight of the inorganic polymeric material as the cured material of the solution is larger than the mass average molecular weight of the solution before curing. Therefore, when the mass average molecular weight of the solution before curing is 5,000 or more, the mass average molecular weight of the inorganic polymer material is also considered to be 5,000 or more.
    [0122] The solution obtained is introduced, for example, into an arbitrary molding die.
    As a molding die, a die according to the intended use of the part for a timepiece can be used.
    [0124] The molding die can be produced, for example, as follows.
    [0125] First, a metal film is formed on a substrate such as a silicon wafer by a vapor deposition method or a sputtering method, then a resistor is applied to the film and dried, thereby a layer of reserve is formed. The thickness of the resist layer is set equally to the thickness of the part for a timepiece (eg, an escape wheel part, an anchor body, or the like).
    [0126] Subsequently, the resist layer is exposed to light by irradiating the resist layer with ultraviolet light or the like in a desired pattern. When the resist layer is exposed to light, an area of which the resist layer is cured (a cured part) by irradiation with ultraviolet light and an area of which the resist layer is not cured (an uncured part) without irradiation with ultraviolet light are formed.
    [0127] Subsequently, the resist layer is developed, and the uncured part of the resist layer is removed, which allows to obtain a molding die.
    [0128] When the solution is introduced into the molding die, a hardening accelerator can be added to the soil as needed.
    [0129] Examples of the cure accelerator include dibutyltin diacetate and the Karstedt catalyst.
    [0130] The molar ratio of the solution to the hardening accelerator (solution: hardening accelerator) is preferably 10: 0.01 to 10: 1, and more preferably 10: 0.1 to 10: 0.2.
    [0131] Further, one or more of the aforementioned fluororesin, inorganic powder and dye can be added to the sol without being mixed in the mixture (M).
    The added amount of fluororesin is preferably an amount such that the fluororesin content relative to the total mass of the inorganic polymer material to be obtained is within the aforementioned range.
    The added amount of inorganic powder is preferably an amount such that the content of inorganic powder relative to the total mass of the inorganic polymer material to be obtained is within the above-mentioned range.
    The added amount of dye is preferably an amount such that the dye content relative to the total mass of the inorganic polymer material to be obtained is within the above-mentioned range.
    [0135] The solution introduced into the molding die is heated and cured, whereby the solution is gelled.
    [0136] Subsequently, the hardened material of the solution is removed from the molding die, so that the part for a timepiece composed of the inorganic polymer material which is the hardened material of the solution is obtained.
    The heating temperature of the solution is preferably 100 to 200 ° C, and the heating time is preferably 30 minutes to 48 hours.
    [0138] The method of removing the cured material from the solution out of the molding die is not particularly limited, and for example, after the cured part of the resist layer has been removed, the film can be removed.
    [0139] When, for example, a dialkoxysilane is used as compound (X), the inorganic polymeric material having at least one of structural unit (3), structural unit (4) and structural unit (5 ) is obtained.
    [0140] When, for example, a trialkoxysilane is used as the compound (X), the inorganic polymeric material having the structural unit (2) is obtained.
    [0141] When, for example, a tetraalkoxysilane is used as the compound (X), the inorganic polymeric material having the structural unit (1) is obtained.
    [0142] The inorganic polymeric material which is the hardened material of the solution has better resistance than silicon. Therefore, according to the method of producing a part for a timepiece described above, it is not necessary to cover the surface of the inorganic polymer material with an alloy film or a lamination film of a oxide film and an alloy film, and therefore, the part for a timepiece enabling weight reduction and demagnetization can be easily produced.
    [0143] It should be noted that in the method of producing a part for a timepiece described above, a solution is introduced into the molding die, and then cured, however, the part for a timepiece. Timepieces can be produced, for example, by curing a solution in the form of a plate, then processing the cured material of the solution into the desired form by machining such as cutting or grinding, or in a similar manner.
    [0144] Furthermore, the part for a timepiece can be produced by injection molding of the solution.
    [0145] On the other hand, in the aforementioned molding die, the resistor is used for patterning, however, for example, when a wheel is produced, a metal sheet in the form of a wheel can be rolled onto a substrate. in place of the reserve layer.
    [0146] Further, the part for a timepiece can be produced by insert molding. For example, when the part for a timepiece is a wheel, a pinion is attached to the center of the wheel, however, when a ring made of metal is disposed in a central part of the molding die for the wheel, and then the solution is introduced and hardened, the wheel composed of the inorganic polymeric material in which the ring is fixed to the central part can be molded integrally. With the ring attached to the wheel, a pinion can be driven in the ring. Further, the sprocket is disposed in the central part of the molding die for the wheel, and then the solution can be introduced and hardened. In doing so, the wheel composed of the inorganic polymer material in which the pinion is fixed to the central portion can be integrally molded.
    [0147] It should be noted that the part for a timepiece obtained by insert molding also refers to an "insert molded product".
    [Movement, timepiece]
    In general, a machine body including a driving part of a timepiece is called a "movement".
    [0149] The movement according to one aspect of the present invention includes the part for a timepiece of the present invention. That is, at least a portion of a part constituting the movement is composed of the part for a timepiece of the present invention. More precisely, one or more of an escape wheel, an anchor body, a barrel wheel, a center mobile, a third mobile, a fourth mobile, and other similar parts are preferably composed of the part. for a timepiece of the present invention. The rest of the parts constituting the movement are not particularly limited, and known parts can be used.
    [0150] The timepiece according to one aspect of the present invention includes the movement of the present invention, and more specifically is constituted by incorporating the movement, a dial, various hands, and any other similar part in a part case. watchmaking.
    [0151] Such a movement and a timepiece include the part for a timepiece of the present invention, and therefore are lightweight.
    [Examples]
    [0152] Hereinafter, the present invention will be described more precisely according to examples, however, the present invention is not limited thereto.
    [Production of molding die]
    [0153] A copper film was formed on the surface of a silicon wafer by a sputtering method, and subsequently, a resistance was applied to the copper film so that the thickness of the film after the drying is 120 µm, followed by drying, thereby forming a resist layer.
    [0154] Subsequently, the resist layer was exposed to light by irradiating the resist layer with ultraviolet light in a pattern so as to have the shape of the escape wheel part 10 shown in Fig. 1.
    [0155] Subsequently, the resist layer developed, and the uncured part of the resist layer was removed, thereby the molding die was obtained.
    [Evaluation]
    [0156] With respect to the hardness of the escape wheel part, the case where the hardness is suitable for an escapement spindle was evaluated by "A", and the case where the hardness is not suitable for an escape rover has been rated by “B”.
    [Example1]
    [0157] Tetraethoxysilane (X-1), water and acetic acid are mixed so that the molar ratio (X-1: water: acetic acid) becomes 10: 15: 1, and the mixture obtained was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), in doing so a solution was obtained. It should be noted that after the first heating step was performed, it was confirmed that the separation of water no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0158] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so the solution was crosslinked and cured.
    [0159] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, in doing so, a part corresponding to an escape wheel composed of an inorganic polymer material which is the Solution hardened material was obtained.
    The hardness of the escapement wheel part obtained was evaluated. The result is shown in Table 1.
    It should be noted that the inorganic polymeric material obtained in Example 1 is composed of - (SiO2) - corresponding to the structural unit (1).
    [Example 2]
    [0162] Tetraethoxysilane (X-1), methyltriethoxysilane (X-2), water and acetic acid were mixed so that the molar ratio (X-1: X-2: water: acid acetic) becomes 5: 5: 15: 1, then the resulting mixture was stirred in a sealed system at 78 ° C for 30 minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), in doing so, a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that the separation of water no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0163] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so the solution was crosslinked and cured.
    [0164] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, in doing so, an escape wheel part composed of an inorganic polymer material which is the hardened material. solution was obtained.
    [0165] The hardness of the escapement wheel part obtained was evaluated. The result is shown in Table 1.
    It should be noted that the inorganic polymeric material obtained in Example 2 is a mixture of a compound composed of - (SiO2) - corresponding to the structural unit (1) and a compound composed of - (Si2 (CH3 ) 2O3) - corresponding to structural unit (2). - (Si2 (CH3) 2O3) - is more precisely represented by the following formula (2-1) below.
    [Example 3]
    [0167] Methyltriethoxysilane (X-2), water and acetic acid were mixed so that the molar ratio (X-2: water: acetic acid) becomes 10: 15: 1, and the mixture obtained was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), by doing so, a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0168] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so, the solution was crosslinked and cured.
    [0169] Subsequently, the hardened part of the resist layer was removed, and then the copper film was removed, in doing so, an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    The hardness of the escapement wheel part obtained was evaluated. The result is shown in Table 1.
    It should be noted that the inorganic polymeric material obtained in Example 3 is composed of - (Si2 (CH3) 2O3) - corresponding to the structural unit (2). - (Si2 (CH3) 2O3) - is more precisely represented by the above formula (2-1).
    [Example 4]
    [0172] Octyltriethoxysilane (X-3), water and acetic acid were mixed so that the molar ratio (X-3: water: acetic acid) became 10: 15: 1, and the obtained mixture was stirred in a sealed system at 78 ° C for 15 hours (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0173] Subsequently, the solution obtained and the dibutyltin diacetate were mixed at a molar ratio (sol: dibutyltin diacetate) which became 10: 0.1, and the mixture obtained was introduced into the molding die and heated to 150 ° C for 30minutes, in doing so, the solution was crosslinked and cured.
    [0174] Subsequently, the hardened portion of the resist layer was removed, and then the copper film was removed, in doing so, an escape wheel piece made of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0175] The hardness of the escapement wheel part obtained was evaluated. The result is shown in Table 1.
    It should be noted that the inorganic polymer material obtained in Example 4 is composed of - (Si2 (C8H17) 2O3) - corresponding to the structural unit (2). - (Si2 (CaH17) 2O3) - is more precisely represented by the following formula (2-2).
    [Example 5]
    [0177] Methyltriethoxysilane (X-2), dimethyldiethoxysilane (X-4), water and acetic acid were mixed so that the molar ratio (X-2: X-3: water: acid acetic) becomes 5: 5: 15: 1, and the resulting mixture was stirred in a sealed system at 78 ° C for 30 minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour ( second heating step), in doing so, a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0178] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so, the solution was crosslinked and cured.
    [0179] Subsequently, the hardened part of the resist layer was removed, and then the copper film was removed, in doing so, an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0180] The hardness of the escapement wheel part obtained was evaluated. The result is shown in Table 1.
    It should be noted that the inorganic polymeric material obtained in Example 5 is a mixture of a compound composed of - (Si2 (CH3) 2O3) - corresponding to the structural unit (2) and a compound composed of - (Si (CH3) 2O) - corresponding to structural unit (5). - (Si2 (CH3) 2O3) - is more precisely represented by the above formula (2-1), and - (Si (CH3) 2O) - is more precisely represented by the following formula (2-3).
    [Example 6]
    [0182] Dimethyldiethoxysilane (X-4), diethoxymethylvinylsilane (X-5), diethoxymethylsilane (X-6), water and acetic acid were mixed so that the molar ratio (X-4 : X-5: X-6: water: acetic acid) becomes 5: 2.5: 2.5: 10: 1, and the resulting mixture was stirred in a sealed system at 78 ° C for 30 minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0183] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so, the solution was crosslinked and cured.
    [0184] Subsequently, the hardened part of the resist layer was removed, and then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0185] The hardness of the escapement wheel part obtained was evaluated.
    It should be noted that the inorganic polymeric material obtained in Example 6 is composed of - (Si4 (CH3) 6C2H4O4) - corresponding to the structural unit (3). - (Si4 (CH3) 6C2H4O4) - is more precisely represented by the following formula (2-4).
    [Example 7]
    [0187] Dimethyldiethoxysilane (X-4), trimethylethoxysilane (X-7), water and acetic acid were mixed so that the molar ratio (X-2: X-3: water: acid acetic) becomes 5: 5: 15: 1, and the resulting mixture was stirred in a sealed system at 78 ° C for 30 minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour ( second heating step), in doing so a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, when the mass average molecular weight of the obtained solution was measured, it was found that the solution contained in a compound having a molecular weight of 5,000 or more.
    [0188] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so the solution was crosslinked and cured.
    [0189] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0190] The hardness of the escapement wheel part obtained was evaluated. The result is shown in Table 1.
    It should be noted that the inorganic polymeric material obtained in Example 7 was more precisely obtained in the form of a mixture in which several types of compounds represented by the following formula (2-5) were intermixed. In the formula (2-5), m is a number from 0 to 100.
    [Table 1]
    [0192] Example 1 tetraethoxysilane (X-1) 1: 2 A Example 2 tetraethoxysilane (X-1) 1: 1.75 A methyltriethoxysilane (X-2) molar ratio (X-1: X-2) = 1: 1 Example 3 methyltriethoxysilane (X-2) 1: 1.5 A Example 4 octyltriethoxysilane (X-3) 1: 1.5 A Example 5 methyltriethoxysilane (X-2) 1: 1.25 A dimethylmatricethoxysilane (X-4) molar ratio (X-2: X-4 ) = 1: 1 Example 6 dimethylmatricethoxysilane (X-4) 1: 1 A diethoxymethylvinylsilane (X-5) diethoxymethylsilane (X-6) molar ratio (X-4: X-5: X-6) = 2: 1: 1 Example 7 dimethylmatricethoxysilane (X-4) 1: 0.75 B trimethylethoxysilane (X-7) molar ratio (X-4: X-7) = 1: 1
    [0193] A pinion was arranged in each of the escapement wheel parts obtained in the respective examples, which was integrated into a movement, in doing so, timepieces were produced. The timepieces thus obtained functioned with a precision equivalent to that of a timepiece including an escapement wheel part made of metal. In addition, the escape wheel parts obtained in the respective examples were made of the inorganic polymeric material, and therefore are non-magnetic, and also light compared to the escape wheel part made of a metal.
    [0194] In this way, according to the respective examples, an escape wheel part allowing weight reduction and demagnetization could be easily produced. In particular, the escape wheel parts obtained in Examples 1 to 6, in which the molar ratio of Si to O (Si: O) in the inorganic polymeric material was 1: 2 to 1: 1 had a hardness suitable for a mobile exhaust.
    [Example 8]
    [0195] Tetraethoxysilane (X-1), water and acetic acid were mixed so that the molar ratio (X-1: water: acetic acid) became 10: 15: 1. Further, PTFE particles (trade name „DispersEZ“, manufactured by Techno Chemical Corporation) having an average particle diameter of 0.2-0.3µm were added as a fluororesin to the mixture so that the ratio of PTFE particles to mass total of (tetraethoxysilane (X-1) and PTFE particles) is 25% by mass. Then ultrasonic dispersion was carried out using a homogenizer for 3 hours, thereby mixing was obtained. The obtained mixture was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. . It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0196] Subsequently, the solution obtained was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so the solution was crosslinked and cured.
    [0197] Subsequently, the hardened part of the resist layer was removed, and then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0198] When a wear and friction test was carried out on the basis of the ball-disc test for the obtained escape wheel part, the amount of wear could be reduced by about 50% compared to the escape wheel part obtained in Example 1.
    [Example 9]
    [0199] Tetraethoxysilane (X-1), water and acetic acid were mixed so that the molar ratio (X-1: water: acetic acid) became 10: 15: 1. Further, spherical silica fine particles (trade name "KE-P30", manufactured by Nippon Shokubai Co., Ltd.) having an average particle diameter of 0.3µm were added as an inorganic powder to the mixture so that the ratio spherical fine particles of silica relative to the total mass of (tetraethoxysilane (X-1) and spherical fine particles of silica) is 20% by mass, in doing so a mixture was obtained. The obtained mixture was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. . It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0200] Subsequently, the solution obtained was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so the solution was crosslinked and cured.
    [0201] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0202] The obtained escape wheel part could reduce the amount of shrinkage during molding (during hardening of the ground), and a dent mark could be suppressed compared to the escape wheel part obtained in the casting. example 1.
    [Example 10]
    [0203] Tetraethoxysilane (X-1), water and acetic acid were mixed so that the molar ratio (X-1: water: acetic acid) became 10: 15: 1. Further, spherical silica fine particles (trade name "KE-P20", manufactured by Nippon Shokubai Co., Ltd.) having an average particle diameter of 0.2µm were added as an inorganic powder to the mixture so that the ratio spherical fine particles of silica relative to the total mass of (tetraethoxysilane (X-1) and spherical fine particles of silica) is 35% by mass. Then ultrasonic dispersion was carried out using a homogenizer for 3 hours, thereby mixing was obtained. The obtained mixture was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. . It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0204] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so the solution was crosslinked and cured.
    [0205] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0206] The escapement wheel part obtained was blue at the time of reflection and was red at the time of transmission.
    [Example 11]
    [0207] Tetraethoxysilane (X-1), water and acetic acid were mixed so that the molar ratio (X-1: water: acetic acid) became 10: 15: 1. Further, Rhodamine B (trade name "R0040", manufactured by Tokyo Chemical Industry Co., Ltd.) was added as a pigment to the mixture so that the ratio of Rhodamine B to the total mass of (tetraethoxysilane ( X-1) and Rhodamine B), ie by mass of 100 ppm. Then ultrasonic dispersion was carried out using a homogenizer for 3 hours, thereby mixing was obtained. The obtained mixture was stirred in a sealed system at 78 ° C for 30 minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), in doing so, a solution was obtained. It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0208] Subsequently, the obtained solution was poured into the molding die and heated at 150 ° C for 30 minutes, in doing so, the solution was crosslinked and cured.
    [0209] Subsequently, the hardened part of the resist layer was removed, and then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0210] The escapement wheel part obtained was colored red.
    [Example 12]
    [0211] Tetraethoxysilane (X-1), water and acetic acid were mixed so that the molar ratio (X-1: water: acetic acid) became 10: 15: 1. Further, fluorescein (trade name "F0095", manufactured by Tokyo Chemical Industry Co., Ltd.) was added as a pigment to the mixture so that the ratio of fluorescein to the total mass of (tetraethoxysilane (X- 1) and fluorescein) either in mass of 100ppm, followed by ultrasonic dispersion using a homogenizer for 3 hours, in doing so, a mixture was obtained. The obtained mixture was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. . It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0212] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so, the solution was crosslinked and cured.
    [0213] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, in doing so, an escape wheel part made of an inorganic polymer material which is the hardened material solution was obtained.
    [0214] The obtained escape wheel part was colored yellow, and when it was irradiated with ultraviolet light, the irradiated part emitted green light.
    [Example 13]
    [0215] Tetraethoxysilane (X-1), water and acetic acid were mixed so that the molar ratio (X-1: water: acetic acid) was 10: 15: 1. Further, umbelliferone (trade name "H0236", manufactured by Tokyo Chemical Industry Co., Ltd.) was added as a pigment to the mixture so that the ratio of fluorescein to the total mass of (tetraethoxysilane (X -1) and fluorescein) or in mass of 100ppm. Then ultrasonic dispersion was carried out using a homogenizer for 3 hours, thereby mixing was obtained. The obtained mixture was stirred in a sealed system at 78 ° C for 30minutes (first heating step), and then stirred in an open system at 100 ° C for 1 hour (second heating step), whereby a solution was obtained. . It should be noted that once the first heating step is completed, it has been confirmed that water separation no longer occurs by hydrolysis. Further, the mass average molecular weight of the obtained solution was measured and found to be 100,000 or more.
    [0216] Subsequently, the obtained solution was introduced into the molding die and heated at 150 ° C for 30 minutes, in doing so, the solution was crosslinked and cured.
    [0217] Subsequently, the hardened part of the resist layer was removed, then the copper film was removed, thereby making an escape wheel part composed of an inorganic polymer material which is the hardened material of the solution was obtained.
    [0218] When the obtained escape wheel part was irradiated with ultraviolet light, the irradiated part emitted blue light.
    [Description of reference numbers and signs]
    [0219] 10 exhaust wheel piece 11 serge 12 hub 13 arm 14 toothing 20 anchor body 21 anchor arm
    权利要求:
    Claims (16)
    [1]
    1. A part for a timepiece, comprising an inorganic polymeric material comprising an inorganic element (Me) and oxygen (O).
    [2]
    2. The part for a timepiece according to claim 1, wherein the molar ratio of inorganic element (Me) to oxygen (O) (Me: O) is from 1: 2 to 1: 1.
    [3]
    3. The part for a timepiece according to claim 1 or 2, wherein the inorganic polymeric material further comprises an alkyl group.
    [4]
    4. The part for a timepiece according to one of claims 1 to 3, wherein the inorganic polymer material further comprises fluororesin.
    [5]
    5. The part for a timepiece according to one of claims 1 to 4, wherein the inorganic polymer material further comprises an inorganic powder.
    [6]
    6. The part for a timepiece according to claim 5, wherein the inorganic powder is dispersed at equal intervals in the inorganic polymeric material.
    [7]
    7. The part for a timepiece according to one of claims 1 to 6, wherein the inorganic polymer material further comprises a dye.
    [8]
    8. The part for a timepiece according to one of claims 1 to 5, wherein the inorganic polymer material is colorless and transparent.
    [9]
    9. The part for a timepiece according to one of claims 1 to 8, which is an insert molded product.
    [10]
    10. A movement, comprising the part for a timepiece according to one of claims 1 to 9.
    [11]
    11. A timepiece, comprising the movement according to claim 10.
    [12]
    12. A method of producing a part for a timepiece, comprisingheating a mixture comprising a compound including an inorganic element (Me) and an alkoxy group, water, and a catalyst, thereby obtaining a solution, and thenhardening of the solution obtained by heating.
    [13]
    13. The method of producing a part for a timepiece according to claim 12, wherein the mixture further comprises a fluororesin.
    [14]
    14. The method of producing a part for a timepiece according to claim 12 or 13, wherein the mixture further comprises an inorganic powder.
    [15]
    15. The method of producing a part for a timepiece according to claim 14, wherein the inorganic powder is dispersed at equal intervals in the mixture.
    [16]
    16. The method of producing a part for a timepiece according to one of claims 12 to 15, wherein the mixture further comprises a colorant.
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