• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Metering system for dispensing a mixture of a first component and a second component, the metering system comprising: (i) a metering gun comprising an inlet body having a first passage for supplying the first component under pressure and a second passage for under pressure supplying a second component, the first and second passages comprising a closable first outlet and a closable second outlet, respectively, which can be operated by means of a handle or trigger of the metering gun; (ii) a static mixing nozzle, which can be removably connected to the outlets of the body and is provided for mixing and dispensing the components, the static mixing nozzle having a first section, which comprises a first chamber and a second chamber, respectively of the first and second components, and a second section (in forward flow direction) following the first section, which contains a mixing chamber with static mixing elements, which mixes the first and second components and directs them to a nozzle point, which serves as an outlet the mixture serves to promote the conductivity of the mixture. According to the invention, at least one of the first and second chambers of the static mixing nozzle includes a series of backflow prevention elements which are arranged to impede the backflow of the respective component into the respective chamber.
    公开号:BE1026292B1
    申请号:E20195202
    申请日:2019-03-29
    公开日:2020-04-21
    发明作者:Peter Geboes；Ivan Boeykens；Thomas Duijsters；Lieven Sichien
    申请人:Soudal Nv；
    IPC主号:
    专利说明:

    Dosing system for mixing two components and static mixing nozzle therefor
    The present invention relates to a dosing system for dispensing a mixture of a first component and a second component, and a static mixing nozzle therefor.
    State of the art
    A two-component metering system is known from EP 1 407 823 A2, which describes a metering device with a gun having a first and a second outlet and a nozzle composed of an intermediate and an extension. The intermediate piece is provided with a first and a second channel, the channels each extending between the first and second outlet of the gun and a mixing chamber. The spacer is removably mounted on an extension provided with a hollow space which can be closed by the spacer to form the mixing chamber. The two components flow into the intermediate piece in separate channels, so that there is no mixing there, so that the outlets of the chambers cannot get clogged by congealed foam.
    Other two or multiple component dosing systems are known from US 4 676 437 A and US 6 021 961 A, which discloses systems comprising a dosing gun and a replaceable nozzle. From US 6 021 961 A it is known to include a non-return valve in the mouthpiece, which is formed by a flexible membrane.
    Object of the invention
    A first object of the present invention is to provide a metering system for dispensing a mixture of a first component and a second component, or a static mixing nozzle therefor, with an alternative construction to reduce the risk of backflow of the mixture of components into outlets reduce the dosing gun.
    A second object of the present invention is to provide a dosing system or a static mixing nozzle therefor, which reduces the risk of backflow without using moving parts.
    A third object of the present invention is to provide a dosing system or a static mixing nozzle therefor which has a simple construction.
    One or more of the aforementioned objects can be achieved with the dosing system, or the static mixing nozzle therefor, as described in the independent claims.
    2019/5202
    BE2019 / 5202
    Description of the invention
    In a first aspect, the invention provides a metering system for dispensing a mixture of a first component and a second component, the metering system comprising: (i) a metering gun comprising an inlet body having a first passage for supplying the first component under pressure and a second passage for supplying the second component under pressure, the first and second passage comprising a closable first outlet and a closable second outlet, respectively, operable by a handle or trigger of the metering gun; (ii) a static mixing nozzle, which can be removably connected to the outlets of the body and is provided for mixing and dispensing the components, the static mixing nozzle having a first portion, which guides a first chamber and a second chamber, respectively of the first and second components, and a second section (in forward flow direction) following the first section, which contains a mixing chamber with static mixing elements, which mixes the first and second components and directs it to a nozzle point, which acts as an outlet for the mixture, conducing the mixture. According to the invention, at least one of the first and second chambers of the static mixing nozzle includes a series of backflow prevention elements which are arranged to impede the backflow of the respective component into the respective chamber. It has been determined that the risk of backflow of the mixture can be effectively prevented by applying a series of static backflow prevention elements in at least one, preferably in both the first and second chambers. The use of static elements for this purpose has the advantage that the use of moving parts can be prevented and that a simple construction of the static mixing nozzle can be achieved.
    The flow passage for the respective component is formed by a series of openings through the static backflow prevention elements, which are preferably arranged in a zigzag configuration. It has been found that by providing such a series of openings, backflow into the outlets of the dispensing gun can be effectively prevented since the backflow mixture must flow back through the multiple openings before it can reach the outlets.
    In embodiments of the invention, the array of static backflow prevention elements may be formed by multiple walls dividing the respective chamber into at least two compartments. It has been found that by dividing the chamber into compartments, which preferably have a volume of 50 to 400 mm 3 , backflow into the outlets of the dispensing gun can be effectively avoided as the backflow mixture before it can reach the outlets the multiple compartments must flow back. Furthermore, the division into compartments, especially with the minimum preferred volume, can ensure that there is always at least one compartment containing 100%, or about 100%, of the respective one component.
    2019/5202
    BE2019 / 5202
    In embodiments of the invention, the plural walls may comprise two alternating series of walls penetrating the chamber from two opposed side walls of the chamber.
    In embodiments of the invention, the walls may be disposed through the respective chamber in an oblique direction relative to the forward flow direction of the respective component. For example, the oblique direction may be 45 ° to the main, forward flow direction of the components through the nozzle (i.e., the longitudinal direction of the nozzle). Installing the walls in an oblique direction may have one or more of the following advantages: less nuisance in the forward flow direction relative to the back flow direction, relatively more compartments per nozzle length.
    In embodiments of the invention, the static mixing elements may comprise yet another series of walls which form a tortuous or circulating flow passage through the mixing chamber.
    In embodiments of the invention, the static mixing nozzle may be an assembly of a sleeve and an insert, the insert fitting into a hollow of the sleeve. This has the advantage that the manufacture of the mouthpiece can be simplified. For example, the sleeve and the inserts can be made of different materials, which are optimized for their respective purpose.
    In embodiments of the invention, the static mixing elements and the static backflow prevention elements can be provided on the insert. This has the advantage that the manufacture of the nozzle can be simplified, for example, because all structures to be provided on the inside of the nozzle are manufactured on the insert, making it possible to manufacture both parts by injection molding.
    In embodiments of the invention, the sleeve may be made of a transparent material that allows visual inspection of the first and second chambers and the mixing chamber.
    In embodiments of the invention, the first and second chambers of the mixing nozzle can have a minimum length of 10 mm.
    In embodiments of the invention, the nozzle tip can be removed from the static mixing nozzle and the system can include multiple interchangeable nozzle tips.
    In a second aspect, which can be combined with other aspects and embodiments described herein, the invention provides a static mixing nozzle for mixing a first component and a second component and dispensing the mixture, the static mixing nozzle comprising: (i) an inlet portion detachably connectable with outlets of a metering gun through which the components are supplied to the inlet portion; (ii) a first section comprising a first room and a
    2019/5202
    BE2019 / 5202 contains a second chamber for guiding the first and second components respectively; and (iii) a second section (following the first section) containing a mixing chamber with static mixing elements, which mixes the first and second components and directs the mixture to a nozzle point serving as an outlet for the mixture. mixture. At least one of the first and second chambers of the static mixing nozzle may include a series of static backflow prevention elements which are arranged to impede the backflow of the respective component into the respective chamber.
    In embodiments, the static mixing nozzle may include features as described elsewhere herein.
    In a third aspect, the invention provides a method of forming a polyurethane foam, comprising: (i) providing an isocyanate component, comprising a diisocyanate or a polyisocyanate and optionally a blowing agent and / or other additives; (ii) providing a polyol component, comprising a blowing agent, a catalyst, a polyol and optionally other additives, and (iii) mixing the isocyanate component and the polyol component to form the polyurethane foam in a static mixing nozzle according to the second aspect.
    Brief description of the figures
    The present invention will be discussed in more detail below with reference to the accompanying drawings.
    Figures 1 and 2 show perspective views of the external sleeve of a static mixing nozzle according to a first embodiment of the invention;
    Figures 3 and 4 show perspective views of the internal component of a static mixing nozzle according to the first embodiment of the invention;
    Figure 5 shows a top view of the internal component comprising the first and second chambers and the static mixing chamber;
    Figure 6 shows a side view of the internal component comprising the first and second chambers and the static mixing chamber;
    Figures 7 and 8 show perspective views of the static mixing nozzle, showing the internal component inserted into the outer sleeve;
    Figure 9 shows a cross-sectional view of the static mixing nozzle, showing the internal component inserted into the outer sleeve;
    Figure 10 shows a schematic view of a second embodiment of a static mixing nozzle according to the invention;
    Figure 11 shows a schematic view of a third embodiment of a static mixing nozzle according to the invention.
    Detailed description of the figures
    2019/5202
    BE2019 / 5202
    The present invention will be described with respect to particular embodiments and with reference to certain drawings, but the invention is not limited thereto but only by the claims. The drawings described are only schematic and non-exhaustive. In the drawings, the size of some elements, for illustrative purposes, may be exaggerated and not drawn to scale. The dimensions and relative dimensions do not necessarily correspond to actual limitations for the practice of the invention.
    Furthermore, the terms first, second, third and the like are used in the description and in the claims to distinguish between similar elements and not necessarily to describe a sequential or chronological order. The terms are interchangeable under appropriate circumstances and the embodiments of the invention may be carried out in sequences other than described or shown herein.
    In addition, the terms top, bottom, over, bottom, and the like are used in the description and claims for descriptive purposes and not necessarily for describing relative positions. The terms thus used are interchangeable under appropriate conditions and the embodiments of the invention described herein can be practiced in directions other than those described or shown herein.
    Furthermore, the various embodiments, although designated as "preferred", are to be understood as exemplary ways in which the invention may be practiced rather than limiting the scope of the invention.
    The term "comprising" used in the claims is not to be construed as being limited to the elements or steps listed below; it does not exclude other elements or steps. It should be understood as specifying the presence of the listed properties, integers, steps or components referred to, but excludes the presence or addition of one or more other features, integers, steps or components, or groups thereof, not off. Thus, the scope of the term "a device comprising A and B" should not be limited to devices consisting only of components A and B, but with respect to the present invention, A and B are the only listed components of the device, and the claim is to be further understood as comprising equivalents of these components.
    A first embodiment of a static mixing nozzle according to the invention will be described with reference to Figures 1 to 9. The embodiment shown is intended for use with dosing guns of the type known from US 4 676 437 A and US 6 021 961 A, or similar dosing guns, which are known per se and are therefore not described in detail here. Embodiments of static mixing nozzles within the scope of the present invention may also be adapted for use with other known dosing guns, for example dosing guns of the type comprising lockable outlets, which are
    2019/5202
    BE2019 / 5202 can be closed by means of a needle in each passage, which penetrates a narrow end of the bore and closes the discharge openings of each bore.
    In Figures 1 through 9, a two component static mixing nozzle 100 is shown as an assembly of a sleeve 101 and an insert 102. The nozzle 100 is configured such that the insert 102 is inserted into a cavity 105 contained in the sleeve 101, as shown in Figure 2. The sleeve 101 is configured to surround the frame 111 of the insert 102 such that first and second components cannot migrate through alternative paths other than those provided by a first chamber 108, a second chamber 108 'and a mixing chamber 109 so that no leakage can occur. The sleeve 101 covers the insert 102 by a body 104 covering the first chamber 108, the second chamber 108 'and the insert mixing chamber 109 around the longitudinal axis. The sleeve 101 is preferably composed of a transparent material which allows the visual inspection of the first chamber 108, the second chamber 108 'and the mixing chamber 109.
    The body 104 is rectangular with a conical edge region at one end. The opposite end of the body 104 has a cylindrical portion 110, which provides an airtight connection when the insert 102 is placed in the sleeve 101. The cylindrical portion 110 includes a clamp 106 that is complementary to a part of the dosing gun (not shown), which provides a locking mechanism when the part of the dosing gun is placed in the clamp. An additional smaller size clamp 107 is attached opposite the clamp 106 to the cylindrical portion 110 and ensures that the sleeve 101 is not misplaced (which could lead to premature mixing) when the static mixing nozzle 100 is in operation.
    In Figure 1, it is shown that the body 104 of the sleeve 101 is rectangular at the base but conical at the edge region, with the width of the body decreasing toward the nozzle tip 103. This width reduction makes the static mixing nozzle (100) in use suitable for applications on small areas. In alternative embodiments, the sleeve can also have other shapes, such as, for example, a cylindrical shape or a conical shape.
    The sleeve 101 includes a nozzle tip 103 that serves as an outlet for the mixed first and second components, as shown in Figure 1. The nozzle tip 103 is conical and has a hollow outlet, which is connected to the mixing chamber 109 and allows the delivery of the mixed components. The diameter of the nozzle tip 103 and its outlet decreases as it extends outwardly from the body 104. This decrease in diameter allows the application of the mixed components to smaller areas. The size of the nozzle tip 103 can be selected depending on the application.
    Figures 3 and 4 show that the insert 102 includes a frame 111 for mixing and dispensing a first and second component. The frame 111 defines a first chamber 108 for a first component, a second chamber 108 'for a second component, which separates the first and second components before mixing in the mixing chamber 109, which
    2019/5202
    BE2019 / 5202 follows the flow path of both components through the nozzle on the first and second chamber. The frame 111 defines the series of backflow prevention elements 113, 113 'for each chamber 108, 108'. The array of static backflow prevention elements is formed by multiple walls dividing the respective chamber 108, 108 'into multiple compartments, openings in the walls connecting the compartments and providing the flow path for the respective component. In the shown embodiment, each chamber has four compartments. Preferably there are at least two such compartments in each chamber. By dividing the chambers into compartments, which preferably have a volume of 50 to 400 mm 3 , backflow into the outlets of the dosing gun can be effectively prevented as the backflow mixture, before it can reach the outlets of the dosing gun, through the multiple compartments must flow back. Furthermore, the division into compartments, especially with the minimum preferred volume, can ensure that there is always at least one compartment containing 100%, or nearly 100%, of the respective one component. Chambers 108, 108 'together with their respective inlet nipples 109, 109' may have a combined volume of 200 to 2000 mm 3 , preferably 400 to 1000 mm 3 . The volume is chosen as a tradeoff between having at least a minimal amount of unmixed component in the respective chamber and not wasting too much component in the mouthpiece.
    In the shown embodiment, the plurality of walls are disposed through the respective chamber in an oblique direction relative to the forward flow direction of the respective component. In the embodiment shown, the oblique direction is 45 ° to the main, forward flow direction of the components through the nozzle (i.e., the longitudinal direction of the nozzle), so that they are less of a hindrance in the forward flow direction relative to the reverse flow direction. The provision of the walls in this direction also has the advantage that relatively more compartments are formed per length of the nozzle, since the successive compartments are arranged partly next to each other. In alternative embodiments, however, the walls can also be arranged in other directions or at different angles to the forward flow path. The walls can also be curved to direct the flow of the components through the respective chambers.
    In the embodiment shown, the flow path for the respective component is formed through the series of openings 120, 120 'and 120 ”, 120” ”through the walls, which are arranged in a zigzag configuration, which contributes to preventing or obstructing the backflow.
    On the inlet side, the insert 102 further includes a platform 115, which contributes to airtight connection when the insert is placed in the cavity 105 of the sleeve 101, complementary to the cylindrical portion 110. The platform 115 includes a first 116 and second 116 'hole , which act as outlets for a first and second component in the respective first chamber
    2019/5202
    BE2019 / 5202
    108 and second chamber 108 'serve. The opposite side of the platform 115 is attached to a cylindrical member 118 configured to support the connection of the dispensing gun (not shown) to the insert 102. The cylindrical member 118 includes a clamp 117 which provides a locking mechanism for attaching the static nozzle 100 to the dispensing gun (not shown). The cylindrical member 118 further includes a first 119 and second 119 'nipples with lip seals used to attach the insert 102 to the dispensing gun (not shown) via a snap closure. A projection 112 is provided on the cylindrical member 118 to ensure correct orientation of the insert in the sleeve 101.
    In Fig. 4, the first 119 and second 119 'nipples are shown, which include a first 121 and second 121' supply, which serve as inlets for the first and second components from the metering gun (not shown) in the static mixing nozzle 100. The first 121 and second 121 'supplies provide a path for components leading to the first 116 and second 116' holes, so that the first and second components can flow into their respective chambers. The feeds 121, 121 'have a small inlet opening, the size of which is selected to control the feed rate of components to the first chamber 108 and second chamber 108', respectively.
    In Figure 4, it is shown that the first chamber 108 and second chamber 108 'are separated by a central wall 122, which separates the first and second components as they tunnel through the static mixing chamber 109. The first chamber 108 and second chamber 108 'comprise a series of static backflow prevention elements 113 which slope diagonally in the direction of the forward component flow and prevent the backflow of components into the dosing gun body (not shown). The static backflow prevention elements 113 penetrate into the chamber from both the central wall 13 and from the outer walls of the chamber, leading to a zigzag configuration. A series of openings 120, 120 ', 120 ”and 120” ”in the static backflow prevention elements 113 allow the movement of the first and second components through the chambers in a zigzag motion. The zigzag movement increases the path length for the first and second components and reduces the chance of the mixed components clogging the dosing gun (not shown). The openings 120, 120 ', 120 ", 120" "and the first 116 and second 116" holes are wider than the inlet holes of the nipples, so that the feed rate is determined by the small inlet holes 121, 121 ".
    In Figure 4, in the mixing chamber 109, a series of static mixing elements 123 are shown which contribute to the mixing of the components. The mixing elements 123 are diagonal artifacts extending from the two opposite ends of the static mixing chamber
    109 stick out. The mixing elements 123 are arranged in an oblique direction relative to the forward flow direction of the components through the mixing chamber and define a helical flow path for the mixture of the components through
    2019/5202
    BE2019 / 5202 the nozzle, so that mixing is promoted. The volume of the mixing chamber is preferably chosen to be as small as possible so as to avoid wasting components, yet large enough and / or with sufficient mixing elements to achieve a desired degree of mixing of the components. Various embodiments of static mixing chambers and / or static mixing elements are known in the art and therefore will not be further explained here.
    Figure 10 schematically shows a second embodiment of a static mixing nozzle 202, also comprising an insert with a frame 212 inserted into a sleeve for mixing and dispensing a first and second component. A first and second component flows into frame 212 through a first 215 and second 215 'nipples, which serve as inlets for the components from a dispensing gun (not shown). The first 208 and second 208 'chamber are separated by a central wall 214 and comprise a series of static backflow prevention elements 213. The static backflow prevention elements 213 penetrate both the central wall 214 and the outer walls of the chamber into the chamber. sloping diagonally in the direction of the component flow. Static backflow prevention elements 213 are deployed to prevent the backflow of a mixture of the first and second components from entering a metering gun (not shown). The first and second components follow their respective first 211 and second 211 'flow path towards the static mixing chamber 209. The first 211 and second 211 'flow path follow a zigzag conformation, which is provided by free spaces between the static backflow prevention elements 213. The first chamber 208 and the first nipple 215 can have a combined volume of 200 to 2000 mm 3 . Since the first 208 and second 208 'chamber and their respective first 215 and second 215' nipples are of the same dimensions, the second chamber 208 'and the second nipple 215' may also have a combined volume of 200 to 2000 mm 3 . In a preferred embodiment, the combined volume of a chamber and its respective nipple is 400 to 1000 mm 3 . The series of static backflow prevention elements is formed by multiple walls defining multiple planes dividing the respective chamber 208, 208 'into multiple compartments. The compartments can have a volume of 50 to 400 mm 3 . The first compartments 210 and 210 'in their respective first 208 and second 208' chambers are larger in size and consequently have a larger volume than the following compartments. Frame 212 has at least two compartments, and a preferred embodiment has at least four compartments.
    Figure 11 schematically shows a second embodiment of a static mixing nozzle 302, which also includes a frame 311 for mixing and dispensing a first and second component. The nozzle 302 is conical in shape, with the width of the nozzle towards the nozzle tip 303 decreasing in size, so that the static mixing nozzle can be used better for application on small areas.
    2019/5202
    BE2019 / 5202
    A first and second components enter frame 311 through a first 316 and second 316 'nipples, which serve as inlets for the components from a metering gun (not shown). Frame 311 also includes a first 308, second 308 'and static 309 mixing chamber. The first 308 and second 308 'chamber are separated from each other by a central wall 314 and comprise a series of static backflow prevention elements 313. The static backflow prevention elements 313 penetrate the central wall 314 as well as the outer walls of the chamber at angles. perpendicular to their origin into the room. Static backflow prevention elements 313 are employed to prevent the backflow of a mixture of the first and second components from entering a metering gun (not shown). The first and second components follow their respective first 312 and second 312 'flow path towards the static mixing chamber 309. The first 312 and second 312 'flow path form a zigzag configuration that is provided by free spaces between the static backflow prevention elements 313. The first chamber 308 and the first nipple 316 can have a combined volume of 200 to 2000 mm 3 . Since the first 308 and second 308 'chambers and their respective first 316 and second 316' nipples have the same dimensions, the second chamber 308 'and the second nipple 316' may also have a combined volume of 200 to 2000 mm 3 . In a preferred embodiment, the combined volume of a chamber and its respective nipple is 400 to 1000 mm 3 . The series of static backflow prevention elements is formed by multiple walls defining multiple planes dividing the respective chamber 308, 308 'into multiple compartments. The compartments can have a volume of 50 to 400 mm 3 . Frame 311 has at least two compartments, and a preferred embodiment has at least four compartments.
    Next, possible components with which the static mixing nozzle of Figures 1 to 9 or other embodiments according to the invention can be used will be described.
    Reference is made to substances, components or ingredients as they existed just before they first came in contact, were formed in situ, mixed or mixed with one or more other substances, components or ingredients according to the present description. A substance, component or ingredient identified as a composition, a reaction product, resulting mixture or the like may acquire an identity, property or character through a chemical reaction or transformation during contact, in situ forming, mixing or mixing when performed according to this description using common sense and the ordinary skills of an average chemist. The transformation of chemical reagents or starting materials for chemical products or final materials is a continuously evolving process that does not depend on the speed at which it proceeds. Accordingly, if such a transformation process is underway, a mixture of starting and final materials can occur, as well
    2019/5202
    BE2019 / 5202 intermediate species. Unless otherwise indicated here, definitions of (relative) amounts of components may refer to the composition as it is.
    In preferred embodiments, the dosing system of the present invention is provided for dispensing polyurethane or polyisocyanate foam. When dispensed, the liquid content can come out as foamed foam, which reacts and cures to form the polyurethane or polyisocyanurate polymer.
    The spray foam industry traditionally works with two components that are mixed, an isocyanate component (also referred to as the “A” component) and a polyol component (also referred to as the “B” component). The designations “A” and “B” may be reversed in some areas. However, the invention is not limited to two-component dosing systems and can generally be applied to multi-component mixing and dispensing systems.
    Thus, a metering system for dispensing a mixture of (at least) a first component and a second component is provided, the first component comprising a diisocyanate or a polyisocyanate and optionally a blowing agent and / or other additives, and the second component may comprise a blowing agent, a catalyst, a polyol and optionally other additives.
    The polyol component can comprise a single polyol or several polyols, which are often deployed and sold as a polyol premix. The one or more polyols present in the polyol component can each be polyol known in the art for preparing a polyurethane foam. As used herein, "polyol" refers to a molecule that has an average of more than 1.0 hydroxyl group per molecule. As used herein, "polyol premix" refers to the total polyol blend present in the polyol component, regardless of their origin (for example, added separately to the polyol component or added as a premixed blend of polyols which may be sold as such).
    Useful polyols include one or more of a sucrose-containing polyol; phenol, a phenol-formaldehyde-containing polyol; a glucose-containing polyol; a sorbitol-containing polyol; a methyl glucoside-containing polyol; an aromatic polyester polyol; an aliphatic polyester polyol; an aromatic polyether polyol; an aliphatic polyether polyol; a mannich polyol; an amino polyol; a polybutadiene polyol; a polycaprolactone polyol; a polycarbonate polyol; a hydroxyl terminal polyolefin polyol; a graft polyol; glycerol; ethylene glycol; diethylene glycol; propylene glycol-containing polyol; graft copolymers of polyether polyols with a vinyl polymer; a copolymer of a polyether polyol with a polyurea; one or more of (a) condensed with one or more of (b): (a) glycerine, ethylene glycol, diethylene glycol, trimethylol propane, pentaerythritol, soybean oil, lecithin, tall oil, palm oil, castor oil; (b) ethylene oxide, propylene oxide, a mixture of ethylene oxide and propylene oxide, or
    2019/5202
    BE2019 / 5202 combinations thereof; aliphatic polyester polyols, aromatic polyester polyols and combinations thereof.
    The polyols generally have a molecular weight in the range of 200 to 6000 g / mol, more preferably from 250 to 2000 g / mol, and most preferably from 250 to 1000 g / mol.
    The polyol or at least one polyol of the polyol premix preferably has a hydroxyl number (OH number) in the range of 28 to 800 mg / KOG g. The hydroxyl number indicates the number of available reactive hydroxyl groups and is expressed as the number of milligrams of potassium hydroxide equivalent to the hydroxyl content of one gram of the polyol sample.
    The polyol or at least one polyol of the polyol premix preferably has a number average hydroxyl functionality (Fn) of 9 or less, more preferably 8 or less. Number-average hydroxyl functionality refers to the average number of hydroxyl groups present on a molecule of the polyol and can be calculated as the ratio of the total number of moles of OH in the polyol or polyol premix to the total number of moles of polyol.
    In embodiments, the polyol or polyol premix is present in the polyol component in an amount of from 20 wt% to 95 wt%, preferably from 30 wt% to 60 wt%, and more preferably from 40 wt% to 50 wt% .%, of the total weight of the polyol component.
    The blowing agent used in the polyol component and / or the isocyanate component can be any blowing agent suitable for use in the formation of a polyurethane foam, such as chlorofluorocarbon (CFC), hydrochlorofluorocarbon (HCFC), hydrofluorocarbon (HFC), hydrohaloolefin (HFO). In embodiments, the blowing agent has little or no global warming potential (GWP) and ozone depleting potential (ODP). When a compound is referred to without any stereochemical designation (such as (cis), (trans), (E), (Z)), any stereoisomer of the compound is included.
    In embodiments, the polyol component and / or the isocyanate component comprises gaseous hydrohaloolefin, preferably a gaseous hydrohaloolefin selected from 1,3,3,3-tetrafluoropropene (HFO 1234ze); 2,3,3,3-tetrafluoroprop-1-ene (HFO 1234yf); 1,1,3,3tetrafluoropropene; 1,2,3,3,3-pentafluoropropene (HFO 1225ye); 3,3,3-trifluoropropene; 1,1,1,3,3 pentafluoropropene (HFO 1225zc); 1,1,2,3,3-pentafluoropropene (HFO 1225yc); (Z) -1,1,1,2,3pentafluoropropene (HFO 1225yez); or a combination thereof.
    In embodiments, the polyol component and / or the isocyanate component includes a liquid hydrohaloolefin blowing agent, preferably a liquid hydrohaloolefin blowing agent selected from 1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz), 1-chloro-3,3,3, trifluoropropene (HFO-1233zd) and combinations thereof, preferably HFO-1336mzz (Z), HFO1233zd (E) and combinations thereof. It should be noted that the abbreviation "HFO", which is in the state of
    2019/5202
    BE2019 / 5202 technique is widely used for referring to liquid hydrohaloolefin blowing agents (such as HFO-1233zd) is sometimes replaced by the term "HCFO".
    In embodiments, the blowing agent in the polyol component and / or the isocyanate component is present in an amount of 5-50 wt%, preferably 10-30 wt%, preferably 15-25 wt% of the total weight of this component. In embodiments, the blowing agent in the polyol component and / or the isocyanate component is present in an amount of more than 1 wt%, preferably more than 5 wt%, preferably more than 10 wt%, preferably more than 15 wt%. % of the total weight of this component. In embodiments, the blowing agent in the polyol component and / or the isocyanate component is present in an amount of less than 70% by weight, preferably less than 50% by weight, preferably less than 40% by weight, preferably less than 30% by weight. % of the total weight of this component.
    The catalyst can be any amine catalyst, metal catalyst or combination thereof suitable to catalyze the formation of a polyurethane foam. Amine catalysts can include primary amine, secondary amine, or tertiary amine catalysts. Metal catalysts can include one or more compounds comprising a metal selected from the group consisting of zinc, lithium, sodium, magnesium, barium, potassium, calcium, bismuth, cadmium, aluminum, zirconium, tin, or hafnium, titanium, lanthanum, vanadium, niobium, tantalum, tellurium, molybdenum, tungsten and cesium, such as organometallic compounds. In embodiments, the total amount of catalyst contained in the polyol component is in the range of 0.1-15 wt%, preferably 0.5-10 wt%, more preferably 1-7 wt% of the total weight of the polyol component.
    The polyol component can include other materials such as, but not limited to, water, flame retardants, dyes, fillers, surfactants, additional catalysts, additional blowing agents, propellants, emulsifiers, solvents and / or plasticizers.
    In embodiments, the dosing system described herein is provided for additional delivery of a third component. An example of a suitable third component is a chain extension component. To this end, the mouthpiece may include a third chamber through which the third component flows into the mouthpiece, which may also include backflow prevention elements as described herein.
    The polyol component can include a diisocyanate, a polyisocyanate or combinations thereof. As used herein, the term "polyisocyanate" stands for any compound with 2 or more isocyanate groups. Any organic polyisocyanate can be used in polyurethane foam synthesis, including aliphatic and aromatic polyisocyanates. Suitable organic polyisocyanates include aliphatic, cycloaliphatic, araliphatic, aromatic, and heterocyclic isocyanates well known in the field of polyurethane chemistry. In embodiments according to the invention, the isocyanate contained in the isocyanate component is an organic polyisocyanate, for example a compound selected from the group consisting of
    2019/5202
    BE2019 / 5202 is formed by the aromatic diisocyanates (such as 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, mixtures of 2,4- and 2,6-toluene diisocyanate, crude toluene di isocyanate, methylenediphenyl diisocyanate, crude methylenediphenyl diisocyanate and the like); the aromatic triisocyanates (such as 4,4 ", 4" triphenylmethane triisocyanate, 2,4,6-toluene triisocyanates); the aromatic tetraisocyanates (such as 4,4'-dimethyldiphenylmethane-2,2 ', 5,5'-tetraisocyanate); arylalkyl polyisocyanates (such as xylylene diisocyanate); aliphatic polyisocyanates (such as hexamethylene-1,6-diisocyanate, lysine diisocyanate methyl ester); polymethylene polyphenyl isocyanates; hydrogenated methylene diphenyl isocyanate; m-phenylene diisocyanate, naphthylene-1,5, diisocyanate, 1-methoxyphenylene-2,4-diisocyanate, 4,4'-biphenylene diisocyanate; 3,3'-dimethoxy-4,4'-biphenyl diisocyanate; 3,3'-dimethyl-4,4'-biphenyl diisocyanate, 3,3'-dimethyldiphenylmethane-4,4'-diisocyanate; alkylene diisocyanates (such as trimethylene diisocyanate, tetramethylene diisocyanate, and hexamethylene diisocyanate, isophorene diisocyanate, 4,4'-methylene bis (cyclohexyl isocyanate)); aromatic polyisocyanates (such as m-, and p-phenylene diisocyanate, polymethylene polyphenyl isocyanate, 2,4- and 2,6-toluene diisocyanate, dianisidine diisocyanate, bitoylene isocyanate, naphthylene 1,4-diisocyanate, bis (4-isocyanate-phenyl), methene, bis (2-methyl-4-isocyanate-phenyl) -methane); and combinations thereof.
    In embodiments of this document, a method of forming a polyurethane foam is provided comprising: (i) providing an isocyanate component, comprising a diisocyanate or a polyisocyanate and optionally a blowing agent and / or other additives; (ii) providing a polyol component, comprising a blowing agent, a catalyst, a polyol and optionally other additives, and (iii) mixing the isocyanate component and the polyol component to form the polyurethane foam in a static mixing nozzle as described elsewhere herein.
    In embodiments, the mixing step (iii) comprises mixing the isocyanate component and the polyol component at a volume ratio of 2: 1 to 1: 2, preferably 1.5: 1 to 1: 1.5, preferably 1.2: 1 , 2, preferably about 1: 1, preferably 1: 1.
    In embodiments, the method provided herein comprises providing the isocyanate component and / or the polyol component at a pressure of at least 5 bar, preferably at least 7 bar, preferably at least 15 bar.
    In embodiments, the mixing step (iii) comprises mixing the isocyanate component and the polyol component such that the NCO / OH stoichiometric ratio ranges from 0.9 to 5.0, preferably 1.0 to 3.0, more at preference is from 1.1 to 2.5.
    In embodiments, a method of forming a polyurethane foam as described herein is provided, further comprising a step of sputtering the mixture of the isocyanate component and the polyol component obtained in step (iii).
    Upon dispensing, a first and second components exit the dispensing gun (not shown) and flow into the first 121 and second 121 'supply inlets of the insert 102. The first and second components tunnel through the cylindrical member 118 to the
    2019/5202
    BE2019 / 5202 first 116 and second 116 'hole respectively. The first 116 and second 116 'holes serve as outlets for the first and second components in the first 108 and second 108' chamber, respectively. The central wall 122 ensures that the first and second components remain separate as they zigzag through openings 120, 120 ', 120 ”, 12” ”in the series of static backflow prevention elements 113.
    The first and second components exit the end openings 120 ”and 120” ”in the edge region backflow prevention elements 113 and flow into the mixing chamber 109. The first and second components are mixed, assisted by their migration through a series of static mixing elements 123. The mixture of the first and second components leaves the frame 111 and flows into the nozzle tip 103. Once present in the nozzle tip 103, the mixture of components handed in.
    权利要求:
    Claims (14)
    [1]
    A dosing system for dispensing a mixture of a first component and a second component, the dosing system comprising:
    a metering gun comprising an inlet body having a first passage for supplying the first component under pressure and a second passage for supplying the second component under pressure, the first and second passage comprising a closable first outlet and a closable second outlet, respectively;
    a static mixing nozzle, which can be detachably connected to the outlets of the body and is provided for mixing and dispensing the components, the static mixing nozzle having a first section, which is a first chamber and a second chamber for guiding the first and second component, and a second section subsequent to the first section, comprising a mixing chamber with static mixing elements, which mixes the first and second components and guides the nozzle to a nozzle point serving as an outlet for the mixture. mixture, promotes;
    at least one of the first and second chambers of the static mixing nozzle comprising a series of static backflow prevention elements adapted to inhibit the backflow of the respective component into the respective chamber, characterized in that the flow passage for the respective component is formed by a series of openings through the static backflow prevention elements.
    [2]
    The dosing system of claim 1, wherein the array of static backflow prevention elements is formed by multiple walls dividing the respective chamber into at least two compartments.
    [3]
    Dosing system according to claim 2, wherein the compartments have a volume of 50 to 400 mm 3 .
    [4]
    Dosing system according to claim 2 or 3, wherein the plurality of walls comprise two alternating series of walls penetrating the chamber from two opposite side walls of the chamber.
    [5]
    Dispensing system according to any one of claims 2 to 4, wherein the walls are arranged in an oblique direction relative to the forward flow direction of the respective component through the respective chamber.
    [6]
    The dosing system of claim 1, wherein the openings are arranged in a zigzag configuration.
    2019/5202
    BE2019 / 5202
    [7]
    A metering system according to any preceding claim, wherein the static mixing elements comprise yet another series of walls that form a tortuous or circulating flow passage through the mixing chamber.
    [8]
    The dosing system according to any of the preceding claims, wherein the static mixing nozzle is an assembly of a sleeve and an insert, the insert fitting into a cavity of the sleeve.
    [9]
    The dosing system of claim 8, wherein the static mixing elements and the static backflow prevention elements are provided on the insert.
    [10]
    The dosing system of claim 7 or 8, wherein the sleeve is made of a transparent material permitting visual inspection of the first and second chambers and the mixing chamber.
    [11]
    Metering system according to any of the preceding claims, wherein the first and second chamber of the mixing nozzle have a minimum length of 10 mm.
    [12]
    12. Static mixing nozzle for mixing a first component and a second component and dispensing the mixture, the static mixing nozzle comprising an inlet portion, which is detachably detachable from a metering gun through which the components are supplied to the inlet portion ;
    a first section containing a first chamber and a second chamber for guiding the first and second components, respectively, and a second section (following the first section) containing a mixing chamber with static mixing elements, which mixes the first and second component and conduction of the mixture to a nozzle tip serving as an outlet for the mixture; at least one of the first and second chambers of the static mixing nozzle comprising a series of static backflow prevention elements adapted to inhibit the backflow of the respective component into the respective chamber, characterized in that the flow passage for the respective component is formed by a series of openings through the static backflow prevention elements.
    [13]
    Static mixing nozzle according to claim 12, comprising any of the features according to any one of claims 2 to 11.
    2019/5202
    BE2019 / 5202
    [14]
    A method of forming a polyurethane foam, comprising: (i) providing an isocyanate component, comprising a diisocyanate or a polyisocyanate and optionally a blowing agent and / or other additives; (ii) providing a polyol component comprising a blowing agent, a catalyst, a polyol and optionally other additives; and (iii) mixing the isocyanate component and the polyol component to form the polyurethane foam, the mixing step being performed in a static mixing nozzle according to any one of claims 12 to 13.
    类似技术:
    公开号 | 公开日 | 专利标题
    JP3625829B2|2005-03-02|Method and apparatus for combining at least two fluid media
    US4801008A|1989-01-31|Dispensing device having static mixer in nozzle
    BE1026292B1|2020-04-21|DOSING SYSTEM FOR MIXING TWO COMPONENTS AND STATIC MIXING NOZZLE THEREFOR
    US5893486A|1999-04-13|Foam dispensing device
    JP6586468B2|2019-10-02|Method for extending the shelf life of olefinic gaseous propellants in polyurethane foam
    US10828018B2|2020-11-10|Methods and devices for forming biomedical coatings using variable mixing rations of multi-part compositions
    TW201043345A|2010-12-16|A multicomponent cartridge for single use
    JP6397119B2|2018-09-26|Cartridge holder, multi-chamber cartridge and metering and mixing apparatus having these
    US20200261931A1|2020-08-20|Foam Dispensing Gun with Third Stream
    US20080225638A1|2008-09-18|Dynamic Helical Mixer and Mixing Apparatus Using Same
    CN108024807B|2021-02-19|Spray or drip tips with multiple outlet passages
    US20210197153A1|2021-07-01|Multiple-chamber container for storing and mixing a multi-component liquid coating or adhesive system
    JP5557275B2|2014-07-23|Two-component reaction solution simultaneous discharge device
    US9534100B2|2017-01-03|One component spray polyurethane application
    EP3013545A1|2016-05-04|Mixing device for two component polyurethane foam formulation
    EP0094782A2|1983-11-23|Improved mixing arrangement for plural component gun
    WO2012169967A1|2012-12-13|Methods and apparatus for mixing chemical components for the manufacture of polyurethane
    AU2012216856B2|2014-12-11|Fluid delivery system
    同族专利:
    公开号 | 公开日
    AU2019278306A1|2021-01-07|
    ES2896148T3|2022-02-24|
    JP2021524830A|2021-09-16|
    CN112423870A|2021-02-26|
    BE1026292A1|2019-12-12|
    EP3574989A1|2019-12-04|
    CA3098594A1|2019-12-05|
    KR20210016522A|2021-02-16|
    US20210205767A1|2021-07-08|
    WO2019228693A1|2019-12-05|
    SI3574989T1|2021-12-31|
    EP3574989B1|2021-08-11|
    EP3801854A1|2021-04-14|
    PT3574989T|2021-09-10|
    PL3574989T3|2021-12-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4676437A|1985-07-17|1987-06-30|Insta-Foam Products, Inc.|Low cost mixing and dispensing gun for reactive chemical products|
    US6021961A|1998-03-06|2000-02-08|Flexible Products Company|Crossover-resistant plural component mixing nozzle|
    EP1407823A2|2002-10-09|2004-04-14|Soudan Patrimonium & Consulting N.V.|Dispensing appliance|
    EP1652589A2|2004-11-02|2006-05-03|Lindal Ventil GmbH|Two component dispensing device with valve assisted mixing element|
    US20090152300A1|2007-12-14|2009-06-18|Discus Dental, Llc|Multi-Compartment Devices Having Dispensing Tips|
    EP2781253A1|2013-03-20|2014-09-24|Sulzer Mixpac AG|Intermediate element for connecting an application element with a storage container|
    EP3299082A1|2016-09-21|2018-03-28|3M Innovative Properties Company|Mixer assembly and device for dispensing a dental material|
    法律状态:
    2020-06-24| FG| Patent granted|Effective date: 20200421 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP18174921.9A|EP3574989B1|2018-05-29|2018-05-29|Dispensing system for mixture of two components and static mixing nozzle therefor|
    [返回顶部]