CN111440520A - Polyurethane varnish and preparation method and application thereof - Google Patents
Polyurethane varnish and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4081—Mixtures of compounds of group C08G18/64 with other macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/61—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
- C08G18/6484—Polysaccharides and derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
Abstract
The invention relates to the technical field of polyurethane varnish, and provides a polyurethane varnish which comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1: (0.1-0.5); wherein the component A comprises the following raw materials in percentage by weight: 10-30% of cellulose organic acid ester, 1-5% of organic silicon, 1-10% of matting powder, 1-5% of filler, 1-10% of auxiliary agent and acrylate resin for balancing; the component B comprises the following raw materials in percentage by weight: 20-50% of solvent, 0-1% of dehydrating agent and the balance of HDI curing agent; the polyurethane varnish is a high-energy type coating which has the advantages of fingerprint prevention, no adhesion to hands, stain resistance, scratch resistance, self-repairing, smell purification, yellowing resistance, high performance, full matt, high permeability and baby-like skin hand feeling.
Description
Technical Field
The invention relates to the technical field of polyurethane varnish, in particular to polyurethane varnish and a preparation method and application thereof.
Background
In the existing woodware coating industry, green and environment-friendly water-based coatings and high-efficiency UV coatings are well developed, and the traditional woodware coatings are affected by environmental protection pressure. In the face of the present situation, the conventional wood coatings should meet the requirements of customers for product performance on the premise of reducing VOC, safety in odor purification and reducing the use of the coatings (saving cost). With the high requirements and enjoyment of people on the painted surfaces of furniture, walls and the like, the novel functional coating skin-feel paint with high permeability and baby-like skin hand feeling is expected to meet the daily enjoyment of people on contact objects, but the existing research on the skin-feel paint is less, and the existing research on the skin-feel paint cannot meet the use requirements of people.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides a polyurethane varnish, which comprises an A component and a B component, wherein the weight ratio of the A component to the B component is 1: (0.1-0.5);
wherein the component A comprises the following raw materials in percentage by weight: 10-30% of cellulose organic acid ester, 1-5% of organic silicon, 1-10% of matting powder, 1-5% of filler, 1-10% of auxiliary agent and acrylate resin for balancing; the component B comprises the following raw materials in percentage by weight: 20-50% of solvent, 0-1% of dehydrating agent and HDI curing agent.
As a preferred technical solution, the silicone in the present invention is a modified silicone.
As a preferable technical scheme, the modified organic silicon is polyether modified organic silicon.
As a preferable technical scheme, the filler in the invention is selected from one or more of sand flour, talcum powder, transparent powder, silicon powder and diatomite.
As a preferable technical scheme, the grain diameter of the sand flour is 8-80 μm.
In a preferred embodiment, the cellulose organic acid ester is selected from one or more of cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose acetate succinate.
As a preferable embodiment, the acrylate resin in the present invention is an acrylate resin containing a polar group.
As a preferable embodiment, the acrylate resin in the present invention is a hydroxy acrylate resin.
The second aspect of the present invention provides a method for preparing the polyurethane varnish, which at least comprises the following steps: mixing and stirring cellulose organic acid ester, acrylate resin, organic silicon, an auxiliary agent, matting powder and a filler uniformly to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
The third aspect of the invention provides an application of the polyurethane varnish, which is applied to furniture and wall decoration.
Compared with the prior art, the invention has the following excellent beneficial effects:
the invention provides a polyurethane varnish, which is a high-transparency matt polyurethane varnish; the high-energy coating has the advantages of fingerprint prevention, no adhesion to hands, stain resistance, scratch resistance, self-repairing, smell purification, yellowing resistance, high performance, full matt, high permeability and skin hand feeling like babies. The wood furniture is mainly applied to solid wood furniture, suite furniture, baby room furniture, office furniture and the like. According to the invention, through screening the appropriate novel functional coating which is mainly made of the odorless hydroxyl acrylic resin, the cellulose acetate and the skin-feel resin polyether modified organic silicon, has the advantages of high permeability, safe odor purification, full matt and baby-like skin feel, the inventor finds that particularly the selected sand flour with the particle size of 8-80 mu m is compounded with the cellulose acetate, the polyether modified organic silicon and the hydroxyl acrylate resin to generate excellent synergistic effect, so that the fineness of the skin-feel effect is optimal. In addition, the coating solves the problems of extremely small construction times and use of paint, greatly shortens the production period, improves the production efficiency and the production cost, and obviously reduces the use amount of the coating to realize green environmental protection.
Detailed Description
The technical features of the technical solutions provided by the present invention will be further clearly and completely described below with reference to the specific embodiments, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The words "preferred", "preferably", "more preferred", and the like, in the present invention, refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
The invention provides a polyurethane varnish, which comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1: (0.1-0.5);
wherein the component A comprises the following raw materials in percentage by weight: 10-30% of cellulose organic acid ester, 1-5% of organic silicon, 1-10% of matting powder, 1-5% of filler, 1-10% of auxiliary agent and acrylate resin for balancing; the component B comprises the following raw materials in percentage by weight: 20-50% of solvent, 0-1% of dehydrating agent and HDI curing agent.
In a preferred embodiment, the polyurethane varnish comprises an A component and a B component, wherein the weight ratio of the A component to the B component is 1: (0.1-0.3);
wherein the component A comprises the following raw materials in percentage by weight: 15-25% of cellulose organic acid ester, 2-4% of organic silicon, 2-8% of matting powder, 2-4% of filler, 2-8% of auxiliary agent and acrylate resin for complementing the balance; the component B comprises the following raw materials in percentage by weight: 30-40% of solvent, 0.2-0.8% of dehydrating agent and HDI curing agent.
In a preferred embodiment, the polyurethane varnish comprises an A component and a B component, wherein the weight ratio of the A component to the B component is 1: 0.2;
wherein the component A comprises the following raw materials in percentage by weight: 20% of cellulose organic acid ester, 3% of organic silicon, 5% of matting powder, 3% of filler, 5% of auxiliary agent and acrylate resin, wherein the balance is complemented; the component B comprises the following raw materials in percentage by weight: 35% of solvent, 0.5% of dehydrating agent and the balance of HDI curing agent.
Component A
In some embodiments, the silicone is a modified silicone.
In some embodiments, the modified silicone is a polyether modified silicone.
In some embodiments, the modified silicone is selected from at least one of SY-1085, SY-1086, SY-1084, SY-1088, skin feel aid MS-816, skin feel aid A3, skin feel aid 450, skin feel aid 1400 sf.
In some preferred embodiments, the modified silicone is SY-1085.
SY-1085, SY-1086, SY-1084 and SY-1088 are purchased from Yi Bo chemical company, Inc.
In some embodiments, the filler is selected from the group consisting of sand flour, talc, transparent powder, silica powder, diatomaceous earth, and combinations of one or more thereof.
In some preferred embodiments, the filler is sand flour.
In some embodiments, the sand flour has a particle size of 8 to 80 μm; preferably, the grain diameter of the sand flour is 25-45 μm; more preferably, the sand flour has a particle size of 40 μm.
In some embodiments, the grits described herein are available from at least one of 3710, 3711, 5378, 5380, Sponger L-15, Sponger L-18, Sponger L0-25, Sponger L1-35, Sponger L2-40, Sponger L-45, Sponger L-60, and Sponger L-80, preferably from at least one of Sponger L-25, Sponger L-35, Sponger L-40, and Sponger L-45, and most preferably from Sponger L-40.
In some embodiments, the cellulose organic acid ester is selected from the group consisting of cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, cellulose acetate succinate in combination with one or more of them.
In some preferred embodiments, the cellulosic organic acid ester is cellulose acetate.
The acrylate resin is an acrylate resin containing polar groups.
In some preferred embodiments, the acrylate resin is a hydroxy acrylate resin.
The kind of the hydroxy acrylate resin in the present invention is not particularly limited, and preferably, the hydroxy acrylate resin is at least one selected from the group consisting of FS-2460A, FS-2060A, Issman Uracrron 7122X-50, AC1150, Alcreset7105, AC4701, AC1010 and AC 3916; more preferably, the hydroxy acrylate resin is selected from at least one of FS-2460A, FS-2060A, Issman Uracron 7122X-50, AC1150, Alcreset 7105; most preferably, the hydroxy acrylate resin is FS-2460A.
In some embodiments, the adjuvant comprises at least one of a dispersant, a defoamer, a leveling agent, uv absorption resistance, an antioxidant; preferably, the auxiliary agent comprises a combination of a dispersant, a defoamer and a leveling agent.
In some embodiments, the weight ratio of the dispersant, the defoamer and the leveling agent is 1: (0-0.4): (0-0.2); preferably, the weight ratio of the dispersing agent to the defoaming agent to the leveling agent is 1: 0.2: 0.1.
the kind of the dispersant in the invention is not particularly limited, preferably, the dispersant is at least one selected from EFKA4010, BYK110, BYK103 and TEGOtwin 4100; more preferably, the dispersant is TEGOtwin 4100.
The type of the defoaming agent in the present invention is not particularly limited, and preferably, the defoaming agent is at least one selected from BYK052, BYK066N, BYK141, BYK8800, AC270, AC300, and HX 2300; more preferably, the defoamer is BYK 052.
The kind of the leveling agent in the invention is not particularly limited, preferably, the leveling agent is selected from at least one of BYK358N, BYK333, BYK323, TEGO450 and EFKA 3777; more preferably, the leveling agent is BYK 358N.
The type of the anti-ultraviolet absorbent in the present invention is not particularly limited, and preferably, the anti-ultraviolet absorbent is at least one selected from Tinuvin292, Tinuvin1130, C81, UV362 and UV-P; more preferably, the anti-ultraviolet absorbent is at least one of Tinuvin292 and Tinuvin 1130.
The kind of the antioxidant in the present invention is not particularly limited, and preferably, the antioxidant is at least one selected from the group consisting of antioxidant 1010, antioxidant 1076, antioxidant 1330, and antioxidant 1098.
B component
In some embodiments, the solvent is selected from at least one of butyl acetate, ethyl acetate, dimethyl carbonate, propylene glycol methyl ether acetate; preferably, the solvent is selected from at least one of butyl acetate and ethyl acetate; preferably, the solvent is butyl acetate.
In some embodiments, the dehydrating agent is selected from at least one of dehydrating agent 902, dehydrating agent BF-5, dehydrating agent G-180; preferably, the dehydrating agent is a dehydrating agent BF-5.
In some embodiments, the HDI curing agent is selected from at least one of HT-100, HT-600, N3390, HI-100.
The second aspect of the present invention provides a method for preparing the dyed veneer paint, which at least comprises the following steps: adding the auxiliary agent into the acrylate resin and the cellulose organic acid ester, uniformly mixing, adding the first filler and the second filler, and uniformly dispersing to obtain a component A; and (3) adding the dehydrating agent and the HDI curing agent into the solvent, and mixing and stirring uniformly to obtain the component B.
The second aspect of the present invention provides a method for preparing the polyurethane varnish, which at least comprises the following steps: mixing and stirring cellulose organic acid ester, acrylate resin, organic silicon, an auxiliary agent, matting powder and a filler uniformly to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
In some preferred embodiments, the preparation method of the polyurethane varnish comprises at least the following steps: uniformly mixing cellulose organic acid ester, acrylate resin and organic silicon, continuously adding an auxiliary agent, uniformly mixing, finally adding matting powder and a filler, and uniformly stirring to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
The third aspect of the invention provides an application of the polyurethane varnish, which is applied to furniture and wall decoration.
The present invention is described in detail below by way of examples, and it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
Example 1
A polyurethane varnish is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 0.2; wherein the component A comprises the following raw materials in percentage by weight: 20% of cellulose organic acid ester, 3% of organic silicon, 5% of matting powder, 3% of filler, 5% of auxiliary agent and acrylate resin, wherein the balance is complemented; the component B comprises the following raw materials in percentage by weight: 35% of solvent, 0.5% of dehydrating agent and the balance of HDI curing agent.
The organic silicon is SY-1085, model number of Anhui Yibo chemical industry Co.
The filler is sand flour with the trade name of Sponger L-40.
The cellulose organic acid ester is cellulose acetate.
The acrylate resin is hydroxy acrylate resin, and the hydroxy acrylate resin is FS-2460A.
The auxiliary agent comprises a combination of a dispersing agent, a defoaming agent and a leveling agent. The weight ratio of the dispersing agent to the defoaming agent to the flatting agent is 1: 0.2: 0.1.
the dispersant is TEGOtwin 4100.
The defoaming agent is BYK 052.
The leveling agent is BYK 358N.
The solvent is butyl acetate.
The dehydrating agent is BF-5.
The HDI curing agent is selected from HT-100.
The preparation method of the polyurethane varnish at least comprises the following steps: uniformly mixing cellulose organic acid ester, acrylate resin and organic silicon, continuously adding an auxiliary agent, uniformly mixing, finally adding matting powder and a filler, and uniformly stirring to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
Example 2
A polyurethane varnish is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 0.1; wherein the component A comprises the following raw materials in percentage by weight: 15% of cellulose organic acid ester, 2% of organic silicon, 2% of matting powder, 2% of filler, 2% of auxiliary agent and the balance of acrylic resin; the component B comprises the following raw materials in percentage by weight: 30 percent of solvent, 0.2 percent of dehydrating agent and HDI curing agent to complement the balance.
The organic silicon is available from Anhui Yibo chemical industry Co., Ltd, model number MS-816 and purchased from Ming-Shen chemical industry.
The filler is sand flour with the trade mark of Sibaner L-25.
The cellulose organic acid ester is cellulose acetate.
The acrylate resin is hydroxyl acrylate resin, and the hydroxyl acrylate resin is Dismann Uracron 7122X-50.
The auxiliary agent is a dispersant.
The dispersant is TEGOtwin 4100.
The defoaming agent is BYK 052.
The leveling agent is BYK 358N.
The solvent is butyl acetate.
The dehydrating agent is BF-5.
The HDI curing agent is selected from HT-600.
The preparation method of the polyurethane varnish at least comprises the following steps: uniformly mixing cellulose organic acid ester, acrylate resin and organic silicon, continuously adding an auxiliary agent, uniformly mixing, finally adding matting powder and a filler, and uniformly stirring to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
Example 3
A polyurethane varnish is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 0.3; wherein the component A comprises the following raw materials in percentage by weight: 25% of cellulose organic acid ester, 4% of organic silicon, 8% of matting powder, 4% of filler, 8% of auxiliary agent and acrylate resin for complementing the balance; the component B comprises the following raw materials in percentage by weight: 40 percent of solvent, 0.8 percent of dehydrating agent and HDI curing agent to complement the balance.
The silicone was a skin-feel aid 1400sf, purchased from lubrian.
The filler is sand flour with the trade mark of Sponger L-45.
The cellulose organic acid ester is cellulose acetate.
The acrylate resin is hydroxy acrylate resin, and the hydroxy acrylate resin is AC 1150.
The auxiliary agent comprises a combination of a dispersing agent, a defoaming agent and a leveling agent. The weight ratio of the dispersing agent to the defoaming agent to the flatting agent is 1: 0.4: 0.2.
the dispersant is TEGOtwin 4100.
The defoaming agent is BYK 052.
The leveling agent is BYK 358N.
The solvent is butyl acetate.
The dehydrating agent is a dehydrating agent G-180.
The HDI curing agent is selected from N3390.
The preparation method of the polyurethane varnish at least comprises the following steps: uniformly mixing cellulose organic acid ester, acrylate resin and organic silicon, continuously adding an auxiliary agent, uniformly mixing, finally adding matting powder and a filler, and uniformly stirring to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
Example 4
A polyurethane varnish is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 0.2; wherein the component A comprises the following raw materials in percentage by weight: 20% of cellulose organic acid ester, 3% of organic silicon, 5% of matting powder, 3% of filler, 5% of auxiliary agent and acrylate resin, wherein the balance is complemented; the component B comprises the following raw materials in percentage by weight: 35% of solvent, 0.5% of dehydrating agent and the balance of HDI curing agent.
The organic silicon is SY-1084, model number of Anhui Yibo chemical industry Co.
The filler is sand flour with the trade name of Sponger L-40.
The cellulose organic acid ester is cellulose acetate.
The acrylate resin is hydroxy acrylate resin, and the hydroxy acrylate resin is FS-2460A.
The auxiliary agent comprises a combination of a dispersing agent, a defoaming agent and a leveling agent. The weight ratio of the dispersing agent to the defoaming agent to the flatting agent is 1: 0.2: 0.1.
the dispersant is TEGOtwin 4100.
The defoaming agent is BYK 052.
The leveling agent is BYK 358N.
The solvent is butyl acetate.
The dehydrating agent is BF-5.
The HDI curing agent is selected from HT-100.
The preparation method of the polyurethane varnish at least comprises the following steps: uniformly mixing cellulose organic acid ester, acrylate resin and organic silicon, continuously adding an auxiliary agent, uniformly mixing, finally adding matting powder and a filler, and uniformly stirring to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
Example 5
A polyurethane varnish is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 0.2; wherein the component A comprises the following raw materials in percentage by weight: 20% of cellulose organic acid ester, 3% of organic silicon, 5% of matting powder, 3% of filler, 5% of auxiliary agent and acrylate resin, wherein the balance is complemented; the component B comprises the following raw materials in percentage by weight: 35% of solvent, 0.5% of dehydrating agent and the balance of HDI curing agent.
The organic silicon is SH-024 acrylic acid modified organic silicon resin of New four seas chemical industry Co., Ltd.
The filler is sand flour with the trade name of Sponger L-40.
The cellulose organic acid ester is cellulose acetate.
The acrylate resin is hydroxy acrylate resin, and the hydroxy acrylate resin is FS-2460A.
The auxiliary agent comprises a combination of a dispersing agent, a defoaming agent and a leveling agent. The weight ratio of the dispersing agent to the defoaming agent to the flatting agent is 1: 0.2: 0.1.
the dispersant is TEGOtwin 4100.
The defoaming agent is BYK 052.
The leveling agent is BYK 358N.
The solvent is butyl acetate.
The dehydrating agent is BF-5.
The HDI curing agent is selected from HT-100.
The preparation method of the polyurethane varnish at least comprises the following steps: uniformly mixing cellulose organic acid ester, acrylate resin and organic silicon, continuously adding an auxiliary agent, uniformly mixing, finally adding matting powder and a filler, and uniformly stirring to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
Performance testing
The polyurethane varnish prepared in example 1 was subjected to the following property tests, and the test results are shown in table 1.
Table 1 example performance test data
2. The polyurethane varnish prepared in the embodiment 1 to the embodiment 5 is subjected to fineness test and skin feeling effect test according to GB/T1724-; the test results are shown in table 2.
TABLE 2 fineness, skin feel Effect test results
| Examples | Fineness of fineness | Skin feel effect |
| Example 1 | Qualified | Good skin feeling effect |
| Example 2 | Qualified | General skin feel effect |
| Example 3 | Qualified | Good skin feeling effect |
| Example 4 | Qualified | Poor skin feel effect |
| Example 5 | Fail to be qualified | Poor skin feel effect |
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content disclosed above into an equivalent embodiment with equivalent changes, but all those simple modifications, equivalent changes and modifications made on the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the present invention.
Claims (10)
1. The polyurethane varnish is characterized by comprising a component A and a component B, wherein the weight ratio of the component A to the component B is 1: (0.1-0.5);
wherein the component A comprises the following raw materials in percentage by weight: 10-30% of cellulose organic acid ester, 1-5% of organic silicon, 1-10% of matting powder, 1-5% of filler, 1-10% of auxiliary agent and acrylate resin for balancing; the component B comprises the following raw materials in percentage by weight: 20-50% of solvent, 0-1% of dehydrating agent and HDI curing agent.
2. The polyurethane varnish according to claim 1, wherein the silicone is a modified silicone.
3. The polyurethane varnish according to claim 2, wherein the modified silicone is a polyether modified silicone.
4. The polyurethane varnish according to claim 1, wherein the filler is selected from the group consisting of sand flour, talc, transparent powder, silica powder, diatomaceous earth, and combinations thereof.
5. The polyurethane varnish according to claim 4, wherein the sand flour has a particle size of 8 to 80 μm.
6. The polyurethane varnish according to claim 1, wherein the cellulose organic acid ester is selected from the group consisting of one or more of cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose acetate butyrate.
7. The polyurethane varnish according to claim 1, wherein the acrylate resin is a polar group-containing acrylate resin.
8. The polyurethane varnish according to claim 1 or 6, wherein the acrylate resin is a hydroxy acrylate resin.
9. A process for preparing the polyurethane varnish according to any one of claims 1 to 8, characterized by comprising at least the steps of: mixing and stirring cellulose organic acid ester, acrylate resin, organic silicon, an auxiliary agent, matting powder and a filler uniformly to obtain a component A; and adding the dehydrating agent and the HDI curing agent into the solvent, and uniformly stirring to obtain the component B.
10. Use of the polyurethane varnish according to any one of claims 1 to 8 for furniture and wall finishing.
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