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    • 专利摘要:
    The invention relates to a method for applying a stucco to a base surface, comprising the steps of: a) mixing: (i) a liquid binding paste comprising at least one organic binder in water, one or more pre-dispersed pigments and an associative thickener, with (ii) a powder plaster comprising one or more mineral binders, fillers, and a cellulose based thickener, and (iii) optionally an amount of water, thereby obtaining a liquid powder plaster mixture, b) applying said liquid powder plaster mixture to a base surface; and c) drying said liquid powder plaster mixture on said base, thereby obtaining a stucco.
    公开号:BE1026720B1
    申请号:E20195776
    申请日:2019-11-12
    公开日:2020-10-16
    发明作者:Bram Soenen；Sylvia Lievens
    申请人:BOSS paints NV；
    IPC主号:
    专利说明:

    BINDING PASTE FOR FORMULATION OF POWDER STUC
    TECHNICAL DOMAIN The invention relates to mixtures for applying a decorative suds to a wall, especially those in which a high quality seal is pursued, which decorative lacing is easy to apply to a wall, and wherein risks of injury to the skilled person are avoided.
    STATE OF THE ART Although wall surfaces can usually be decorated by means of a vert or wallpaper layer, there is also a demand for wall surfaces with stucco, where the stucco can be provided with a color. Such wall surfaces can be achieved by using a pigment or a pigment mixture. joints to the plaster mixture to be applied based on cement or lime. However, a known problem is that the color accuracy of a plaster mixture is difficult to fine-tune. US 2011/0052790 A1 describes for this purpose a kit of parts and a method for repairing stucco, which are intended to apply a pigmented stucco mixture to a wall. The objective is to match the color of the newly applied stucco mixture with the wall surface to be repaired). It soon becomes clear that such a repetitive "trial-and-error" method is not very attractive.
    In addition, new methods of preparing a pigmented stucco composition should avoid any risks of dust explosions, Such dust explosions can occur when a dust mixture mixes with oxygen from the air, A slight ignition, such as by static decomposition, can under such circumstances give rise to dust explosion, US 2004/0226482 A1 describes a method for preparing a colored cement composition. The method essentially involves a slan in which a pigment is added to the powder plaster mixture before sintering. Thus, the pigment is incorporated into the cement, and an approved cement is obtained. However, such methods are less suitable for dosing organic pigments into a plaster. or cement composition. A drawback of organic pigments is the risk of dust explosions, as well as their limited usability in highly alkaline environments,
    BE2019 / 5776 Due to the limited methods known in the art, the commercial availability of colored stucco is very limited, and mainly the commercial availability of stucco with high color glow relative to a predetermined color. The present invention contemplates a solution. for at least some of the above problems,
    SUMMARY To this end, according to a first aspect, the present invention provides a method for applying a stucco to a base surface, comprising the steps of: mixing {PD} 2 to 20% by volume binder paste comprising: at least one organic binder in water and optionally zen or multiple pigments, with {13 to 80% by volume of a powder paste comprising: sen or multiple mineral binders, fillers, and a thickener, and an amount of water, thereby obtaining a liquid powder vacuum mixture, wherein said organic binder is mixed in an amount of 2.5 to 5.0% by volume with respect to the total volume of enclosed Hquide powder paste mix; fi. applying cencemed Hiquide posder plaster to a base; and, the drying of the nected floulde nocderstuc mixture on said ground visc, thereby obtaining a stucco. Working with a binding paste offers the possibility to work with a pigmented binding paste, which can be obtained by selecting one of the binding paste with a quality mixing method. not to be dosed by adding a posder-shaped pigment mixture to a stucco powder, which offers the advantage that a larger variata in color can be made in the stucco, so that the stucco can also be adjusted in relation to a predetermined quality, such as according to the methods described in US 2011/0052790 A1 and especially according to the method described in BE 102 1352, In such a way it can be ensured that a high degree of color accuracy is obtained. In a preferred embodiment, the first aspect relates to a method for applying a stucco to a base, comprising the steps of: a) mixing:
    {BP a lguide binder pastes comprising at least one organic binder In water, one or more predispersed pigments and an associative thickener, {N a powder paste comprising one or more minerais binders, fillers, and a cellulose based thickener, and {ii} optionally an amount water, thereby obtaining a liquid powder putty mixture, upon applying said Hguide powder putty mixture to a ground plane; and drying said liquid powder plaster mixture on said base plane, thereby obtaining stucco.
    The use of pre-dispersed pigments, embedded in a Higuide binding paste ensures a good dispersion. This is advantageous for the local mixing of the binding paste while retaining a good fastness and correctness.
    Furthermore, this allows both the mixing of different pigments in a binding paste and the mixing of binding pastes with different pigments. In this way, a wider range of colors can be realized.
    The use of a suitable thickening agent moreover allows that water not evaporates too quickly and that the liquid powder paste mixture can be processed better and for a longer period of time.
    As a result, one balch can be prepared and applied to a wall surface over a period of B hours. In addition, the invention provides a method in which the user does not have to dose a powdered organic binder and / or pigment dosage to a powdered substance. dust explosions completely avoided. In a second aspect, the present invention provides a kit for making a liquid powder paste mixture by adding 20 to 80 parts by volume of water and then homogenizing the composition, comprising: Ar 2 to 20 parts by volume of binding paste comprising: at least one organic binder in water and optionally one or more pigments; and B. 30 to 80 parts by volume of powder plaster comprising: one or more mineral binders, fillers, and thickener,
    wherein said organic binder is provided in an amount of 0.5 to 5.0 parts by volume relative to the total volume of said liquid powder paste mixture. Such a kit allows the skilled person to dose an accurate amount of the binding paste to a powdered plaster in a simple manner. Good dispersion, distribution, smoothness, rheological properties and the like are ensured by the binding paste. As a result, a considerably larger range of colors can be obtained. with better color fastness and color fermentation, in particular compared to feed pigments, 18 In a preferred embodiment, the second aspect concerns a kit for preparing a liquid powder paste mixture by adding water and then homogenizing the composition, comprising: A a liquid binder paste comprising at least one organic binder in water, one or more predispersed pigments and an associative thickener with 8, a pocder plaster comprising one or more mineral binders, fillers, and a cellulose based thickener, The associative thickener ensures rheolo gical stability, For example, the binding paste 23 with pre-dispersed pigments are homogeneous for a long time, neither thickening nor diluting, This increases the stability of the color of the powder plaster, This allows you to restore an existing plaster without noticeable color differences,
    DETAILED DESCRIPTION OF THE INVENTION Unless otherwise defined, all terms used in the description of the invention, including technical and scientific terms, have the meaning as commonly understood by those skilled in the art of the invention, for a better assessment of In the description of the invention, the following terms are explicitly explained. “One”, “the” and “it” in this document refer to both singular and plural unless the context clearly suggests otherwise, For example, “one segment” means gene or more than one segment,
    When approximately "or" around "Used in this document: When a measurable quantity, a parameter, a period of time or moment, etc. is used, then variations of +/- 20% or less are meant, dif preferably +/- 10% 6 or less, more preferably +/- 5% or less, even more preferably +/- 1% or less, and even more preferably 5 +/- 0.1% or less than and of the quoted value, for insofar as such variations apply in the described invention, however, this is to be understood as meaning the value of the quantity that uses the term “approximately” or round ”! is itself specifically disclosed.
    18 The terms “comprise”, “comprising”, “consisting of”, “consisting of”, “provided with”, “containing”, “containing”, “comprising”, “comprising”, “containing”, “comprising” are synonyms and are inclusive or open terms that indicate the presence of what follows, and that do not exclude or impede the presence of other components, features, elements, members, steps known from or described in the art, Quoting numerical Intervals through the endpoints all integers, fractions and / or real numbers fall between the endpoints, these endpoints Included, The term hydraulic lime (ML) is to be understood as lime or slaked lime, or a mixture of belde, which can be used for making lime mortars or plasters that harden under the influence of water, Hydraulic lime hardens relatively quickly, The term 'natural hydraulic lime' refers to a natural type of lime that contains impurities such as clay and is released by heating or cells of limestone. The lime reacts in the lime kiln with the clay particles and forms: silicates that partly harden by hydration, The deities that do not convert through binding with clay particles, are quenched as it were Lot calcium hydroxide which then hardens again by carbonization or air, Hence the hydraulic NHL kaik is also an air-drying quality. The coding of the type NHL-kaik is determined by the compressive strength, Drulev-resistant NHL lime such as NHL5 is used for “hard” tossings; for "soft" applications NHL2 is used, For other applications NHL3.5 can be used,
    & BE2019 / 5776 The term "pigments" is to be understood as a synonym for the term dyes "or" dyes "and in the context of the present invention preferably refers to pigments in the form of a binding paste.
    Canned pigments can overturn both organic and inorganic pigments. Said binding paste can be either a universal binding paste or a water-based binding paste. The term "posederstuc" is to be understood as a powder which can be bound and used for construction or decoration applications.
    Suitable powder stucco materials are concrete, plaster, or stucco. 18 The term "pre-dispersed pigment" is to be understood as a pigment or pigment composition that disperses in water without further additives.
    A pigment that disperses forms a homogeneous mixture in water.
    DH homogeneous mixture can be, for example, an emulsion, suspension or solution. The term "predispersed pigment" includes water-based pigments but is not limited to water-based pigments, Predispersed pigments which, once water is added, quickly form dispersions without the addition of emulsifiers or surfactants. water are available on the market and also fall within this definition,
    The invention essentially relates to a liquid, easy-to-dose water-borne binder for formulating powder powder. In a first aspect, the invention relates to a method for applying a stucco to a base, comprising the steps of:
    LL mixing (1) a binding paste comprising: at least one organic binder in water and optionally one or more pigments, with (1) a powder paste comprising: one or more mineral binders, fillers, and a thickening agent, and (in an amount of water , thereby obtaining an Hguide powder stuernen mixture:
    H applying said liquid powder paste mixture to a ground plane; and ii, drying said liquid posder stucco mixture on said base plane, thereby obtaining sen stucco,
    Preferably said binding paste is mixed in an amount of 2 to 20% by volume, relative to the total volume of said liquid powder paste mixture. More preferably, said binding paste is mixed in an amount of 4 to 20% by volume and even more preferably. in an amount of & up to 20 volume - $% with respect to the total volume of said liquid posder plaster mix. Even more preferably, said binding paste is comprised of an organic binder in water in an amount of 1 to 7% by volume with respect to the total volume of said liquid powder paste mixture and one or more pigments in an amount of 0 to 20 volume-3 by volume. with respect to the total volume of said iguide powder plaster mixture, More specifically said binding paste is comprised of an organic binder In water in an amount of 1, 2, 3, 4, 5, 6 or 7% by volume with respect to the total volume of said liquid powder mixture, and one or more pigments in an amount of 0, 1, 2, 3, 4, 5, 6, 7, &, 10, 12, 14, 16, 18 or 20% by volume of the total volume of said liquid 18 powder paste mixture. Still preferably, nested powdered paste is mixed in an amount of 30 to 80% by volume, relative to the total volume of said Liquid paste mix. More preferably, nested powdered paste is mixed in an amount of 30 to 70% by volume, and more. Preferably in a quantity of 35 to 45% by volume, relative to the total volume of mentioned Houide powder paste. More specifically, said powder paste is mixed in an amount of 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45 volume-0% 6, relative to the total volume of cited guide powder paste mixture.
    Still preferably, nested organic binder is mixed in an amount of 0.5 to 5.0 volume% with respect to the total volume of nested liquid powder cement mixture, more preferably in an amount of 1.0 to 4.0 volume% and even more preferably in an amount of 1.0 to 3.0 volume%. More specifically, nemed organic binder is mixed in an amount of 1.2, 1.4, 1.6,
    1.8, 2.0, 2.2, 2.4, 2.6 or 2.8 volume% or any value in between.
    In addition, the invention precedes a method in which the user does not have to mix organic, powdered binder and / or powdered pigments with a powdered silica. Therefore, the risk of dust explosions is completely avoided. In a preferred embodiment, the present invention provides a method according to the invention. The most important aspect of the invention, wherein said binding paste comprises one or more pigments. It is understood that the invention is not limited to the preferential composition. Compositions leading to a powdered plaster are well known,
    The addition of water is optional, depending on the amount of water contained in the binder. If the binder contains sufficient water, the addition of additional water is not necessary.
    In a preferred embodiment, the first aspect relates to a method of applying a substrate to a substrate comprising the steps of: a) mixing: a liquid binding paste comprising at least the organic binder in water, one or more predispersed pigments, and associative thickener, with ii} a powder plaster covering one or more minerzie binders, fillers, and a cellulose based thickener, and (optionally is a quantity of water, thereby obtaining a liquid powder plaster mixture, bh} applying gencemds guide posder plaster to a base surface; and ©} the drying of clamped liguid powder mixture egg on the clamped base, thereby obtaining a stucco. In a further preferred embodiment, the first aspect relates to a method for applying a stucco to a base, comprising the steps of: a} mixing: { 3 sen Higuide staining medium comprising at least one organic binder in water and sen associate thickener, with a water-based pigment mixture, comprising pine or more predispersed pigments, thereby obtaining colored liquid binder paste B3 mixing of various colored hiquide binder paste, with a powder paste comprising one or more mineral binders, fillers, and a cellulose based thickener, and
    (U) optionally an amount of water, thereby obtaining a liquid powder grinding mixture, b) applying said liquid powder grinding mixture to a ground plane; and ©} the drying of a genocised liquid powder mixture with an unclamped base, thereby obtaining a stucco. Working with a binding paste offers the possibility to work with a pigmented binding paste, which can be obtained by coloring 18 sen d binding paste with a quality mixing system. so not to be dosed by adding a posder-shaped pigment mixture to a stucco powder, DE offers the advantage that a greater variation in color can be created in the stucco. As a result, the stucco can also be matched tan with respect to a predetermined color, such as according to, among others, the methods described in US 15 2011/0052790 A1 and especially according to the method described in BE 102 1352. In such a way it can be ensured that a high degree of color accuracy is obtained. The water-based pigment mixtures can preferably be mixed without flocculation, This is the result of using pre-dispersed pigments, Thus, the i doorpestas are mixed, they also have a long sheif life, preferably the shelf life is at least 2 weeks, even more preferably at least 4 weeks, even more preferably & weeks, even more preferably B weeks, even more preferably weeks, even more preferably 12 weeks. Preferably the water-based pigment mixture is stable. This is the case for many pre-dispersed pigments, in particular aqueous mixtures of water-based pre-dispersed pigments.
    Preferably, the water-based pigment mixture shows no settling. Preferably the water-based pigment mixture is homogeneous for at least 6 weeks, even more preferably the water-based pigment mixture is homogeneous for at least 8 weeks, even more preferably the water-based pigment mixture is nomogenic for at least 10 weeks. weeks, even more preferably it is a water-based pigment mixture! homogeneous for at least 12 weeks, even more preferably the water-based pigment mixture is homogeneous for at least 14 weeks, Preferably the water-based pigment mixture does not show any thickening or dilution, More preferably even the viscosity of the water-based pigment mixture does not exceed 20% or decrease during a period of at least 1 year, still preferably during BE2019 / 5776 and a period of at least 18 months, even more preferably during a period of at least 2 years, most preferably during a period of at least 5 years, In a preferred As an embodiment, the present invention provides a method according to the first aspect of the invention, wherein said mineral binders are selected from: hydraulic lime, hydrate lime, cement, or a mixture of two or more of the above; and wherein said fillers are selected from: talc, silicate, alkali or alkaline earth carbonate, or a mixture of two or more of the aforesaid, Preferably said mineral binder is hydraulic lime, and said fillers are selected from talc, sicate, and calcium magnesium carbonate , or a mixture of two or more of the aforementioned, In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said mineral binders are selected from: hydraulic lime, hydrate clay, cement, gypsum or a mixture of two or more of the aforementioned; and wherein said fillers comprise talc, silicate, alkali or alkaline earth carbonate. Preferably said mineral binder is hydraulic lime, cement or gypsum and said fillers are selected from talc, silicate, and calcium magnesium carbonate, or a mixture of two or more of the aforementioned In a more preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said powdered paste is comprised of: hydraulic lime, talc, silicate, and calcium magnesium carbonate. Preferably, the powdered paste is comprised of a mixture comprising hydraulic lime, talc, silicate, and calcium magnesium carbonate in a weight ratio of approximately equal to Z: 1: 1: 1.
    In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said thickener contained in said powder paste comprises a non-lonic cellulose ether and / or polysaccharide ether, preferably a non-lonic cellulose ether. Suitable thickening agents include methyl and ethyl ethers of cellulose-based binders such as sodium carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, ethyl cellulose and the like. Other examples of suitable thickeners are zeimme, gum, and derivatives thereof. Also a mixture of Lwes or several of the aforementioned binders are employed to obtain the desired properties.
    In a further preferred embodiment, the cellulose based thickener in said powder piece is selected from: methyl cellulose {MC}, ethyl cellulose {EC}, hydroxy ethyl cellulose (HEC), hydroxypropyl cellulose (HPC), methyl hydroxyethyl cellulose (MHEC), athyl hydroxyethyl cellulose (EHEC), ethylhydroxypronyl cellulose (EHPC), methylhydroxypronyl cellulose (MHEC}, methylhydroxypronylcellulose {MHPC}, carboxymethyl cellulose (CMC) and methyl, ethyl, hydroxy ethyl cellulose {MEHEC) or a mixture thereof, BH preferred is the thickener mentioned in the mentioned powder comprised in an amount of 0.01 to 10.0% by weight with respect to the total weight of 18 nosderstue, and preferably in an amount of (201 to 2.0% by weight, and more preferably in an amount of 1, 1, 1.2, 1.3, 1.4, 1.5, 1.5, 1.7, 1.8, 1.9 or 2.0 wt Ye, or any value in between, Gencemd thickener increases the water retention of the posderstue.
    This allows the mortar to be applied for a longer period of time.
    The thickener makes it possible to obtain the desired consistency, in particular viscosity, so that the mortar can be easily applied. Furthermore, the thickener improves the adhesion to the substrate and the cohesion of the product with each other, in particular the product with the binding paste.
    Preferably, said thickener is included in said powder paste in an amount of 0.2 to 2.5 volume-2 relative to the total volume of 23 pc of powder paste, and preferably in an amount of 1.0 to 2.0% by volume, and more by ysorkeur In an amount of 1.1, 1.2, 1.3, 1.4, 1.5, 1.5, 1.7, 1.8, 1.8 or 2.0% by volume, or any value in between.
    In a preferred form of ulceration, the present invention provided a method according to the first aspect of the invention, wherein said thickening agent in said powder paste comprises methyl ethyl hydroxyethyl. cellulose, Methyl ethyl hydroxyethyl cellulose provides an extremely suitable workability and good water retention of the powder plaster mixture, which guarantees good bonding of the stucco to the substrate.
    In a preferred embodiment, the present invention provides a method according to the most important aspect of the invention, wherein said organic binder comprises nested binder paste in an amount of 0.1 to 80.0% by weight, relative to the total weight of said binding paste for adding the pigments, even more preferably said binding paste is in an amount of 10.0 to 60.0% by weight, relative to the total weight of said binding pastes before adding the pigments,
    In a preferred form of vivo, the present invention provides a method according to the first aspect of the invention, wherein said organic binder is included in said binder paste in an amount of 5 to 70% by volume relative to the total volume. of said binder paste, BIJ is preferably nested organic binder in said binder paste to be in an amount of 5 to 50 volume%, more preferably in an amount of 5 to 55 volume%, and still more preferably in an amount of 5 to 50 volume - $% and more Preferably at a rate of 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28 or 30 volume-S4, or any value in between, Known organic binders are acrylic or polyurethane-based. Preferably, said organic binder is acrylic-based.
    These binders can be selected according to the desired properties of the powder paste to be applied and according to the desired tack properties. In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said binding paste comprises a low shear thickener in an amount of 0.1 to 2.0 volume% e, relative to the total volume of extracted binding pastes.
    Preferably, nested iow-shear thickener is added in an amount of 0.1 to 1.0 volume, more preferably 0.15 to 0.50 volume% and even more preferably in no amount of 0.15. volume%, 0.20 volume%, 0.25 volume%, 0.50 volume%, 0.35 volume%, or 0.40 volume%, Said low-shear thickener ensures good stability of the bindpasts.
    In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said organic binder is dissolved in a walnut mixture, including an organic solvent such as an alcohol, preferably a glycol, Water offers the advantage that it is environmentally efficient and harmless to the health of the user, Preferably, monopropylene glycol is added as solvent, Monopropylene glycol is an odorless and colorless, viscous organic floor slipper and allows the drying properties of the resulting powder paste mixture when sent, Monopropylene glycol is also referred to by term propylene glycol and having the E number E1520. In a preferred embodiment, the binding paste comprises an associative thickener. An associative thickener is a thickener, typically a low-shear thickener, selected in association with nenated organic binder.
    The associative thickener improves the rheniogic properties of the binder paste. In a preferred embodiment, the associative thickener in the liquid binder paste is selected from: hydrophobically modified alkali swellable emulsions (HASE thickeners), non-ionic polyurethane associative thickeners (HEUR thickeners), or modified polyethylenes. a mixture of these.
    In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said binding paste comprises an associative thickener, preferably a low shear thickener, in an amount of 0.01 to 2.0% by weight, relative to the invention. with respect to the total weight of said binding paste before adding the pigment. Preferably said associative thickener is added in an amount of 0.1 to 1.0 wt.%, More preferably from 0.15 to 0.50 wt.%, And even more preferably in an amount of.
    0.15 wt-59, 2.20 wt%, 0.25 wt%, 0.30 wt%, 0.35 wt%, or 0.40 wt%, Cemented associative thickener provides good stability of the binder paste. Furthermore, the associative thickener fine-tunes the recogical properties of the binding paste, whereby the binding paste can be mixed more easily with the powder paste.
    Organic binders are known to those of skill in the art. The organic binders can be employed in dispersion, emulsion or solution in a solvent. Organic binders include: acrylic binder, styrene acrylic binimides, alkyd emulsions, casein, vinyl polymers, vinyl copolymers, water gasses and the like. Most preferably, acrylic binder and styrene acrylic binder are used. This combination is well suited for use with preferred associative thickeners. In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein said pigments are selected from organic pigments and inorganic pigments, preferably inorganic pigments, Organic pigments. , and preferably water-soluble, organic pigments, offer the advantage that a good incorporation into the binding paste is obtained and that there is no risk of the pigments collapsing in the binding paste. As a result, a better stability of the binding paste can be obtained. In the case of inorganic pigments, additional additives can be added to the binding paste in order to improve the stability of the paste Le and to prevent separation of the pigments,
    In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein the mean area size of said pigment is less than the mean particle size of mixed powder.
    Preferably, the powder stage employed has an average decition size greater than or equal to the particle size of the pigment. For example, when the pigment is used to grade concrete, a desired pigment particle size approaches or is smaller than the size of a decition of cement in the matrix. {about 0.1 microns) Instead of the larger size of sand grains or other aggregate of the reward mix, In some embodiments, the pigment has an average particle size of less than one micron, such as between 0.61 and one micron, In some embodiments, it has a particle size Essentially between one micron and three microns is preferred. In some embodiments where the matrix to be colored is translucent, the desired particle size for the pigment may be based on considerations other than the size of matrix deities.
    In general, a particle size of 4 microns or less is preferred for most matrices. The pigments are preferably pre-dispersed. More preferably the pigments are
    28 pre-dispersed and water-based, Water-based pre-dispersed pigments are easy to mix with an aqueous binder paste, ensure good dispersion of the pigment in the powder paste, Liquids are also easier to dose accurately than powders and granulates, which is essential for obtaining the desired final color. The use of pre-dispersed pigments ensures good dispersion no matter where the liquid binder paste is colored. Furthermore, pre-dispersed pigments are more miscible, easier to use and easier to calibrate to provide pigment mixtures.
    Furthermore, various additives can be added to the figured binding paste. These additives are known to those skilled in the art. Preferred additives include bocdes, defoamer, antirocst, coalescing agent, wetting agent, hydrophobic agent and the like.
    The advantages with regard to the mixing and distribution of pigments are also applicable to additives, The stability of a powdered sludge with additives dispersed therein can be improved by adding it to the liquid binding paste, The binding paste is water-based, Preferably the binding paste contains little volatile organic compounds (VOCs or VOCs). Most of the time, the binding paste does not include VOCs, This is ecologically beneficial, It is also better suited for applying a stucco in an enclosed space. In a preferred embodiment, the present invention provides a method according to the first aspect of the invention, wherein prior to the application of liquid powdered powder mixture on the genocised base surface cerst a stucco primer with grain is applied to said base surface. ensures that the applied stucco has a good adhesion to the substrate. Subsequently, a second plaster layer is preferably also applied in the same method as described above, wherein said second plaster layer is preferably gilded. In a preferred embodiment, the present invention provides a method according to the first aspect of the application, wherein after application and drying of said liquid powder plaster mixture on said base surface, a layer of varnish is applied on top of the stucco. This provides an additional protection for the applied stucco.
    In a second aspect, the present invention provides a kit for making a liquid powder mastic mix by adding 20 to 60 parts by volume of water and then homogenizing the composition, comprising: A. 2 to 20 parts by volume of binding paste comprising: at least one organic 28 binder in water and optionally sen or multiple pigments; and B, 30 to 80 parts by volume of powder plaster comprising: one or more minerzie binders, fillers, and a thickener, said organic binder being provided in an amount of 0.5 to 5.0 parts by volume relative to the total volume. of the mentioned liguid powder paste mixture, in a preferred embodiment, the second aspect provides a kit for making a liquid powder paste mixture by adding water and subsequently homogenizing the composition, comprising: A, a liguid binding paste comprising at least one organic binder in water, one or more pre-dispersed pigments and an associative thickener with B. a powder paste comprising one or more minerzie binders, fillers, and a cellulose based thickener,
    Such a kit enables a person skilled in the art to dose in a simple manner an accurate amount of the binding paste to a powder. It is also possible to provide a binding paste without pigments and to add pigments predispersed on site.
    In a particularly preferred embodiment, the second aspect provides a kit for preparing a liquid powder paste mixture comprising: A, a liquid coloring medium comprising at least one organic binder in water, and an associative thickener with B. a powder paste comprising one or more mineral binders, 18 fillers, and a cellulose based thickener, and ©. a water-based pigment mixture comprising one or more pre-dispersed pigments, Unlike traditional powder pastes, which are typically colored with good pigments, the use of pre-dispersed, preferably water-based pigments in a liquid binder paste is advantageous. These pre-dispersed pigments can be painted as described in BE 102 1352 , This allows to obtain an increased color accuracy, The pre-dispersed pigments can be added on site, The pre-dispersed pigments are better suited! in front of
    23 bottom interference, Compared to powdered pigments, a better dispersion and color fastness is obtained here,
    According to this method, a water-based pigment mixture can be provided for almost any color, with high color fastness and the possibility of using these water-based pigment mixtures for other types of paints, in contrast to powder pigments, where standard approvals are usually provided and where dispersion, color fastness and stability are not can be guaranteed, So a much wider range of approvals can be offered,
    The pre-dispersed pigments can be added to a powdered plaster as well as to a traditional paint. The pre-dispersed pigments also show significantly better color fastness when used in various media, such as posdersiue and paint or lacquer. This allows corresponding colors for, for example, a paint or coat and provide a powder store,
    Preferably said binding paste is provided in a quantity of up to 20 parts by volume, but preferably mixed binding paste is mixed in an amount of 4 to 20 parts by volume and even more preferably in a quantity of 8 to 20 parts by volume. Even more preferably, said binder paste is comprised of an organic binder In water in an amount of 1 to 7 parts by volume and one or more pigments In an amount from D to 20 parts by volume. More specifically, said binder paste is comprised of an organic binder. in water in an amount of 1, 2, 3, 4, 5, & or 7 parts by volume, and or several pigments in a farm field of 0, 1, 2, 3, 4, 5.6, 7, B, 10, 12, 14, 16, 18 or 20 parts by volume, 18 Still preferably mixed nosdersiue is mixed in an amount of 30 to 80 parts by volume. More preferably nested powdered silica is mixed in an amount of 30 to 70 volume parts. parts, and even more preferably in an amount of 35 to 45 parts by volume, More Specifically, the powdered paste is mixed in an amount of 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45 parts by volume. Still preferably said organic binder is mixed in an amount of 1.5 to 5.0 parts by volume, more preferably in an amount of 1.0 to 4.0 parts by volume, and even more preferably in an amount of 1.0 to 3.0 parts by volume. More specifically, the organic binder is mixed in an amount. of 1.2, 14, 1.5, 1.8, 2.0, 2.2, 2.4, 2.6 or 2.8 parts by volume or any value in between. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention, wherein said mineral binders are selected from: hydraulic lime, hydrate, cement, or a mixture of two or more of the aforementioned; and wherein said fillers are selected from talc, silicate, alkali or earth-potassium carbonate, or a mixture of any or more of the aforementioned. Preferably said mineral binder is hydraulic lime, and said fillers are selected from talc, silicate, and calcium magnesium carbonate, or a mixture of two or more of the above.
    In another preferred embodiment, the present invention provides a kit according to the second aspect of the invention, wherein said mineral binders are selected from: hydraulic lime, hydrate lime, cement or gypsum or a mixture of two or more of the above; and wherein said talc, silicate, alkali or alkaline earth carbonate falls, Preferably, said mineral binder is hydraulic lime, cement or gypsum, and said fillers are selected from talc, silicate, and calcium magnesium carbonate, or a mixture of two or more of the aforementioned, In a preferred embodiment, the present invention provides a kit according to the second aspect of the bond, wherein said powder composition comprises: hydraulic lime, talc, silicate, and calcium magnesium carbonate. Preferably said powder paste is comprised of a mixture comprising hydraulic lime. , Talc, silicate, and calcium magnesium carbonate in a weight ratio of approximately equal to 2: 1: 1: 1. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention, wherein said thickening agent is contained in said powder a non-lonic cellulose ether and / or polysaccharide ether, Li] preferred ur a non-ionic cellulose ether. Suitable thickeners include methyl and ethyl esters of cellulose-based binders such as sodium carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, ethyl cellulose and the like. Other examples of suitable thickeners are zeïme, gum, and derivatives thereof. Also, a mixture of two or more of the aforementioned binding agents can be employed to obtain the desired properties. Preferably, said thickener is included in said kit in an amount of 28 to 0. 2 to 2.5 parts by volume, and preferably in an amount of 1.0 to 2.0 parts by volume, and more preferably in an amount of 1.1, 1.2, 1.3, 1.4, 1.5, 1.6,
    1.7, 1.8, 1.9, or 2.0 volumes, or any value in between. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention, wherein said thickener contains methyl ethyl hydroxyethyl. cellulose, Methyl ethyl hydroxyethyl cellulose provides an extremely convenient processability and good water retention of the polymer plaster mixture. This ensures good bonding of the stucco to the substrate. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention. invention wherein nested organic binder is included in nested binder paste In an amount of 5 to 70 parts by volume, relative to the total volume of said binder paste, Preferably said organic binder is contained in said binder paste in an amount of 5 to 60 parts by volume. parts by volume, more preferably in an amount of 5 to 55 parts by volume, and even more preferably in an amount of 5 to 50 parts by volume and even more preferably in an amount of 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28 or 30 parts by volume, or any value in between, Known organic binders are acrylic or polyurethane based materials. sated.
    Preferably said organic binder is acrylic based. These binders can be selected according to the desired properties of the powder plaster to be applied and selection properties. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention, wherein said binder paste a low shear thickener comprised in an amount of 0.1 to 2.0 volume%, Preferably said low shear thickener is added in an amount of 0.1 to 1.0 volume Ye, more preferably from 0.2 to 0.5 volume% and even more preferably In an amount of 0.2 volume%, 0.3 volume%, 0.4 volume% or 0.5 volume%. Named low-shear thickener provides good stability of the binding paste. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention, wherein said solvent is selected from: water, an organic solvent such as alcohol or oil, preferably said solvent is water.
    Water offers the advantage that it is environmentally friendly and harmless to the health of the user, Preferably, monopropylene glycol is added as suivent, Monopropylene glycol is an odorless and colorless, viscous organic vinegar and allows to adjust the drying properties of the resulting powdered sludge mixture, Monopropylene glycol also referred to by the term propylene glycol and by the E number E1520, In a preferred embodiment the binding paste includes an associative thickener, An associative thickener is a thickener, typically a low-shear thickener, selected in association with said organic binder, The associative thickener improves the rheological properties of the binding paste.
    In a preferred embodiment, the associative thickener in the liquid binder paste is selected from: hydrophobically modified alkali swellable emulsions (HAGE thickeners), non-ionic polyurethane associative thickeners (HEUR thickeners), modified polyethers or a mixture thereof. In a preferred embodiment the present invention provides. Invention In a kit according to the second aspect of the invention, wherein said binding paste comprises an associative thickener, but preferably a low shear thickener, in an amount of COI to 2.0% by weight, relative to the total weight of said binding paste for adding the pigment. Preferably said associative thickener is added in an amount of G.1 to 1.0% by weight S6, more preferably of
    0.15 to 0.50 wt% and even more preferably In an amount of 0.15 wt-5b,
    0.20 wt%, 0.25 wt%, 0.30 wt%, 0.35 wt-3%, or 0.40 wt%. This association thickener ensures good stability of the binding paste. associative thickener the reciogical properties of the binding paste on Bunt, making it easier to mix the binding paste with the powder paste. In a preferred embodiment, the present invention provides a kit according to the second aspect of the invention, with said organic binder comprising said binding paste in an amount of 0.1 to 80.0% by weight, relative to the total weight of said binding paste. for addition of the pigment, even more preferably, said binding paste is in an amount of 10.0 to 60.0% by weight, relative to the total weight of said binding paste before addition of the pigment.
    Organic binders are known to those skilled in the art. The organic binders can be applied in dispersion, emulsion or solution in a solvent. Organic binders include: acrylic binder, styrene acrylic binders, alkyd emulsions, casein, vinyl polymers, vinyl copolymers, water gasses and the like. Preferably acrvi binder and styrene acrylic binder are used. This combination is well suited! for use with preferred associative thickeners, In a further preferred embodiment, the cellulose based thickener in said powder piece is selected from: methyl cellulose (MC), ethyl cellulose {EC} hydroxy ethyl cellulose (HEC), hydroxypropyl cellulose (HPC), methyl hydroxyethyl cellulose (MHEC} L ethyl hydroxyethyl cellulose (EHEC), methylhydroxypronylcellulose (EHPC), methylhydroethylcellulose (MHEC), methylhydroxypropylcellulose {MHPC), carboxymethyl cellulose (CMC} and methyl, ethyl, hydroxyethyl cellulose {MEHEC) or a mixture thereof Various additives can be added to the liquid binding paste. These additives are known to the skilled person. Preferred additives include biocides, defoamer, anti-rust, coalescing agent, wetting agent, hydrophobic agent! and such. The advantages with regard to mixing and distributing pigments can also be applied to additives. The stability of a powder paste with additives dispersed therein can be improved by adding it to the Houide binding paste,
    EXAMPLES In the following, the invention is described a.0, h, v, a non-limiting example illustrating the invention, and which is not intended or may be construed to imitate the scope of the invention. In these examples, more compositions of the powder stue set forth. However, it is clear that the skilled person knows which compositions are suitable for making a powder plaster, and that the invention has not been imitated to these compositions, EXAMPLE 1 A wall surface which is to be provided with a stucco is provided with a stucco primer with grain, Stucco primers are commercially available and are known to those of skill in the art. The application of a plaster primer to a wall surface is also known to the skilled person. The skilled person is further provided with a water-based binding paste and a powdered plaster mixture. The high-viscous binding paste comprises a binder and an amount of water, optionally further comprising a concentrate of pigments. of the desired color, the pigments or pigment paste in the aqueous solution with organic binder is dosed to a pigmented binder paste by means of a color mixing system. This allows the pigment to be accurately dosed in the powder mixture mixture. As a result, a predetermined color setting can be achieved accurately. In addition, different batches of the pigmented powder stucco mixture can be easily reproduced. Thus, it can be guaranteed that the stucco of larger surfaces always maintains the same color and / or color tone.
    By providing a water-based binding paste, the skilled person should not dose pigments in powder form to the powder vacuum mixture. Apart from a more accurate dosing and a larger range of colors, this offers the additional advantage that the risk of dust explosions during the dosing of a pigment powder such as a powder stage is avoided,
    The binder paste is essentially a concentrated base paint comprising pigments and a binder in water, this concentrated base paint having properties according to the parameters in Table 2. & Table 1: Elgenschanpen of a colorless, waler-borne binder paste.
    Binder content (vole) 0 EEE Density (g / m 1.07 Solid matter content {vole} 26.2 Pigment volume concentration {2%} 11.1 The binder paste comprises a scryate binder, monopropylene glycol, an amorphous silica for the desired gloss (matting ), a biocide, a high-shear thickener, a low-shear thickener, an anti-rust agent, and a coalescing agent in amounts as indicated in Table 2, and acids and bases to achieve a desired pH of " The resulting paste shows no syneresis of flocculation and slabile rheology, Table 2: Composition of colorless binding paste with organic binder, base set 0 composition of acrylic binder 2E Evol monopropylene glycoi 8.97% by weight amorphous silica 5.46% by weight biocide 1.04% by weight high shear thickener 0.34% by weight low shear thickener 0.24 weight% anti-rust agent 0.37 weight% coalescing agent 1,899 weight% water up to 100 weight%
    PR Said water-based binding paste is mixed with a powder paste comprising a thickening agent according to the composition. In Table 3 In a volume ratio of binding paste to powder paste of about 1: 2 to 1: 5. The mixture is diluted with water in an amount of powder to water of about 2: 1 (gravimetric).
    Table 3: Composition of powder paste with thickener. raw material composition (Vichis-5% 63 hydraulic lime 38.70 taik 19.85 silica 19.85 calcium magnesium carbonate 19.85 methyl methyl hydroxyethyl cellulose 0.75 total 100 This way a fine powder plaster mixture is obtained which is applied on top of the previously applied plaster primer.
    Due to the specific composition of the liquid powder paste mixture, it was found that the ultra-hardening time was considerably extended, namely to at least 12 hours, This allows the skilled person to use the prepared powder paste mixture up to 12 to 14 hours after creating the powder paste mixture, This considerably simplifies the operating conditions. For the skilled person, In addition, for a specific wall surface, the skilled person should not make different batches of powdered plaster mixes, so that the risk of (slightly) deviating color shades is avoided. In practical terms, this also means that a predetermined surface can be finished by fewer craftsmen, albeit for a longer working time.
    After applying a first layer of plaster, a drying process is started under standard environmental conditions.A drying time of at least 16 hours is sufficient to proceed to the application of a second layer of plaster. For the application of a second layer of plaster, the same composition of the liquid powder, but about 5% more water by weight is added.
    As soon as the surface water has disappeared from the second, applied plaster layer, the applied plaster layer can be polished according to the desired aesthetic properties, EXAMPLE 2 Instructions are completely analogous to the instructions according to Example 1 with the following deviations, The binding layer is essentially not a concentrated base paint falling over. pigments and a binder in water, whereby this concentrated base paint has properties according to the parometers In table 4,
    Table 4: Properties of a pigmented, water-based binding paste.
    Binder content (vol) ME Density (g / m 1.54 Solids content {voi-% 3 40.71 Pigment volume concentration (ls) 77.5 The binder paste comprises an acrylic binder, a pigment (12 volume% oxide yellow in relation to the total volume of powder paste mixture} and water, and acids and bases for a desired 5H of 8. The resulting paste shows no syneresis or floeculation and stable rheology.
    Said water-borne binder paste is mixed with a powder paste 16 comprising a thickener according to the composition in Table 5 in a volume ratio of binder paste to powder paste of about 112 to 1: 5. The mixture is diluted with water in an amount of powdered paste to water of approximately 2: 1 {gravimetric}. Table 5: Composition of powdered paste with thickener, raw material composition (weight} hydraulic clay 35.70 talc 19.85 silica 19.85 calcium magnesium carbonate 19.85 methyl ethyl hydroxyethyl cellulose 0.75 total 100 Further processing is analogous to the instructions according to Example 1, EXAMPLE 3
    A powder paste was prepared and applied according to a method such as Example 1. The composition is shown in Table 5. The binding paste is water-based. Table 6: Composition of cement and hydrate-based powdered plaster,
    raw material composition [volume%)} “Posderstuc based on cement and hydrate lime BZ Binding paste with pigments 178 Water 20.1 total TO EXAMPLE 4 A powder paste was prepared and applied according to a method such as example 1. The composition is shown in table 7, The binding paste is water based, Table 7: Composition of hydraulic lime based powder composition. raw material composition (volume - #%} Powder paste based on hydraulic lime 37.4 Binding paste with pigments 19.2 Water 43.4 total 100 EXAMPLE 5 A powder paste was prepared and applied by a method such as example 1. The composition is shown in label 8, The binding paste is water-based. Sufficient water was added to the binding paste that no additional water was required, Table 8: Composition of cement based powder plaster, raw material composition (volume% 5} Powder plaster based on cement 54.1 Binding paste with pigments 45.5 EE
    EXAMPLE 6 Fan powder paste was prepared and applied in a method such as Example 1. The composition is shown in Table 9, The binding paste is water-based,
    Table 9: Composition of cement-based powder plaster. raw material composition (volume%} Powdered plaster based on cement 56.7 Binding paste with pigments 24.6 Water 18.7 total 100
    权利要求:
    Claims (14)
    [1]
    A method for applying a stucco to a base, comprising the steps of: a) mixing: {D a liquid binder paste comprising at least one organic binder in water, one or more pre-dispersed pigments and an associative thickener, with Ci a powder plaster comprising one or more mineral binders, fillers, and a cellulose-based thickener, and (iii) optionally an amount of water, thereby obtaining a liquid powder plaster mixture, b) applying said liquid powder plaster mixture to a base surface; and c) drying said liguide powder stucco mixture on said base, thereby obtaining a stucco,
    [2]
    A method according to claim 1, wherein said mineral binders are selected from: hydraulic lime, hydrate lime, cement, gypsum, or a mixture of two or more of the above; and wherein said fillers include talc, silicate, alkali or alkaline earth carbonate,
    [3]
    A method according to at least one of claims 1 to 2, wherein said mineral binder comprises hydraulic lime, cement or gypsum, and wherein said fillers comprise talc, silicate or calcium magnesium carbonate.
    [4]
    A method according to at least one of claims 1 to 3, wherein the cellulose based thickener in the powder paste is selected from: methyl cellulose (MC), ethyl cellulose (EC), hydroxy ethyl cellulose (HEC), hydroxypropyl cellulose (HPC), methyl hydroxyethyl cellulose (MHEC), ethyl
    [5]
    A method according to at least one of claims 1 to 4, wherein the associative thickener in the liquid binder paste is selected from: hydrophobically modified alkali swellable emulsions (HASE thickeners}, non-ionic polyurethane associative thickeners (HEUR thickeners) and / or modified polyethers.
    [6]
    A method according to at least one of claims 1 to 5, wherein said pre-dispersed pigments are water-based.
    [7]
    A method according to at least one of claims 1 to 6, wherein prior to applying said liquid powder stucco mixture to said base surface, a stucco primer with grain is first applied to said base surface.
    [8]
    A method according to at least one of claims 1 to 7, wherein after applying and drying the liquid powder stucco mixture on said base surface, a layer of varnish is applied on top of the stucco,
    [9]
    A kit for making a liquid powder paste mixture by adding water and then homogenizing the composition, comprising: A. a liguide binder paste comprising at least one organic binder in water, one or more predispersed pigments and an associative thickener, wherein the associative thickener is selected from: hydrophobically modified alkali swellable emulsions (HASE thickeners), non-ionic polyurethane associative thickeners (HEUR thickeners), modified polyethers or a mixture thereof; and B. a powder paste comprising one or more mineral binders, fillers, and a cellulose based thickener.
    [10]
    Kit according to claim 9, wherein said mineral binders are selected from: hydraulic lime, hydrate lime, cement, gypsum or a mixture of two or more of the above; and wherein said fillers include talc, silicate, alkali or alkaline earth carbonate.
    [11]
    A kit according to at least one of claims 9 or 10, wherein said powder paste is comprised of: hydraulic lime, talc, silicate, and calcium magnesium carbonate, preferably in a weight ratio of 2: 1: 1: 1.
    [12]
    A kit according to at least one of claims 9 to 11, wherein said thickener in the powder paste comprises a non-ionic cellulose ether and / or polysaccharide ether, preferably a non-ionic cellulose ether.
    [13]
    Kit according to at least one of claims 9 to 12, wherein the cellulose-based thickener in the powder paste is selected from: methyl cellulose (MC), ethyl cellulose (EC), hydroxy ethyl cellulose (HEC), hydroxypropy! cellulose (HPC), methyl hydroxyethyl cellulose (MHEC), ethyl hydroxyethyl cellulose (EHEC), ethylhydroxypropyl cellulose (EHPC), methylhydroethyl cellulose (MHEC), methylhydroxypropyl cellulose (MHPC), carboxymethyl cellulose (CMC) and methyl, ethyl, hydroxy ethyl cellulose (MEHEC) ) or a mixture of these,
    [14]
    Kit according to at least one of claims 9 to 13, wherein said organic binder is included in said binder paste in an amount of 0.1 to 80 volume% with respect to said binder paste, preferably in an amount of 10 to 60 volume% -%.
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    同族专利:
    公开号 | 公开日
    BE1026315B1|2019-12-23|
    BE1026720A1|2020-05-19|
    引用文献:
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    法律状态:
    2020-12-04| FG| Patent granted|Effective date: 20201016 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20185795A|BE1026315B1|2018-11-12|2018-11-12|BINDING PASTA FOR FORMULATING POWDER STUCK|
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