CN110698964A - Two-component waterborne polyurethane engineering machinery finish paint and use method thereof - Google Patents
Two-component waterborne polyurethane engineering machinery finish paint and use method thereof Download PDFInfo
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- CN110698964A CN110698964A CN201911107219.0A CN201911107219A CN110698964A CN 110698964 A CN110698964 A CN 110698964A CN 201911107219 A CN201911107219 A CN 201911107219A CN 110698964 A CN110698964 A CN 110698964A
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- waterborne polyurethane
- siloxane
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 23
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003973 paint Substances 0.000 title abstract description 18
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 16
- 230000007062 hydrolysis Effects 0.000 claims abstract description 15
- 239000000839 emulsion Substances 0.000 claims abstract description 14
- AZIQALWHRUQPHV-UHFFFAOYSA-N prop-2-eneperoxoic acid Chemical compound OOC(=O)C=C AZIQALWHRUQPHV-UHFFFAOYSA-N 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 9
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 8
- XJRAOMZCVTUHFI-UHFFFAOYSA-N isocyanic acid;methane Chemical compound C.N=C=O.N=C=O XJRAOMZCVTUHFI-UHFFFAOYSA-N 0.000 claims description 8
- 239000002562 thickening agent Substances 0.000 claims description 8
- 239000003085 diluting agent Substances 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 239000013530 defoamer Substances 0.000 claims description 3
- 125000005375 organosiloxane group Chemical group 0.000 claims description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 2
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 229910000077 silane Inorganic materials 0.000 claims description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004132 cross linking Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 241001448624 Miliaria Species 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000006068 polycondensation reaction Methods 0.000 abstract description 3
- 206010067484 Adverse reaction Diseases 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract description 2
- 230000006838 adverse reaction Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- OGFYGJDCQZJOFN-UHFFFAOYSA-N [O].[Si].[Si] Chemical group [O].[Si].[Si] OGFYGJDCQZJOFN-UHFFFAOYSA-N 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 239000002518 antifoaming agent Substances 0.000 description 5
- 239000011527 polyurethane coating Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 125000001931 aliphatic group Chemical group 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000005056 polyisocyanate Substances 0.000 description 4
- 229920001228 polyisocyanate Polymers 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000080 wetting agent Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- -1 polysiloxane Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical group [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C08G18/6295—Polymers of silicium containing compounds having carbon-to-carbon double bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a two-component waterborne polyurethane finishing coat for engineering machinery and a using method thereof, wherein the component A comprises waterborne hydroxyl acrylate emulsion modified by organic siloxane, organic silicon accounts for 0.1-3.0% of the weight of the emulsion, and the component B comprises organic siloxane. The component A and the component B are modified by organic siloxane, on one hand, residual water in a paint film can be completely consumed by hydrolysis and polycondensation of siloxane, the release of carbon dioxide caused by adverse reaction of excessive NCO groups and the residual water is reduced, the problem that the paint film on the surface of the waterborne polyurethane engineering machinery is prone to miliaria under the condition of thick film thickness is fundamentally solved, and in addition, the air permeability of the paint film is improved by the silicon-oxygen-silicon structure in the coating, so that the effects of releasing water vapor and reducing the defects of pinhole and dark bubbles are obvious. Due to the existence of multiple crosslinking, the finish paint can form a more compact crosslinking network, and the coating has extremely high hardness, oil resistance, acid and alkali resistance, chemical resistance and excellent weather resistance.
Description
Technical Field
The invention relates to a two-component polyurethane paint, in particular to a two-component waterborne polyurethane engineering machinery finish paint and a use method thereof.
Background
The water-based paint has the characteristics of safety and environmental protection, is used for replacing solvent-based paint with serious pollution, and has wide application in many fields. In the field of industrial coatings, the existing water-based hot door mainly comprises water-based acrylate coating, water-based epoxy coating, water-based polyurethane coating and the like, wherein the water-based polyurethane coating is mainly used as finish paint in the aspect of engineering mechanical coating due to good decoration and mechanical properties and excellent alkali resistance, water resistance and moisture resistance of a coating, and is matched with water-based epoxy, water-based alkyd, water-based polyester and other anticorrosion primers. The existing waterborne polyurethane coating is a two-component product, has good performance after being dried, but has extremely strict requirements on construction parameters and environment, has the defects of easily generating miliaria and pinholes, is difficult to control the construction quality, has low yield and high rework probability, and greatly restricts the application of the waterborne polyurethane coating in the field of industrial paint. And the component A prepared by adopting organic siloxane modified film-forming resin, the component B prepared by adopting organic siloxane modified isocyanate and a stabilizing agent, wherein isocyanate groups in the component B react with hydroxyl groups in the component A resin in the film-forming process, and then organic siloxane on the molecules of the component B and organic siloxane on the molecules of the component A undergo hydrolysis and polycondensation reactions in the film-forming process to form a cross-linked coating with an interpenetrating network structure of polyurethane and polysiloxane. Compared with the common water-based polyurethane coating, the invention has the advantages that the reaction of hydroxyl in the organic siloxane modified hydroxyl acrylic emulsion and isocyanate group in the component B in the coating film forming process also exists the hydrolysis reaction of organic siloxane on the component A resin and the component B curing agent, on one hand, the residual moisture in the paint film can be completely consumed by the massive hydrolysis of the organic siloxane, the drying speed is improved, and the unfavorable reaction of the residual moisture in the paint film and excessive NCO groups is reduced, so that the release of carbon dioxide is caused. After hydrolysis and solidification, insoluble polysiloxane is formed, the air permeability of a paint film is increased, the water vapor is well released, and the effect of reducing the pinhole dark bubble defect is obvious.
Disclosure of Invention
The invention mainly aims to provide a two-component waterborne polyurethane finishing coat for engineering machinery and a using method thereof.
The two-component waterborne polyurethane finishing coat for the engineering machinery comprises a component A and a component B, wherein the component A comprises waterborne hydroxyl acrylate emulsion modified by organic siloxane, organic silicon accounts for 0.1-3.0% of the weight of the emulsion, and the component B comprises organic siloxane.
Further, the two-component waterborne polyurethane finishing coat for engineering machinery also has the following optimized formula.
The organic siloxane used for modification in the component A adopts one or more of gamma-methacryloxypropyl trimethoxy siloxane, tri (dimethylamino) siloxane and gamma-aminopropyl-ethoxy siloxane. The organic siloxane in the component B adopts one or more of SILANE A-187, gamma-aminopropyl triethoxy siloxane and methyl triethoxy siloxane.
The component A further comprises a filler, a hydrolysis control agent, a dispersing agent, a thickening agent, a defoaming agent and a leveling agent.
The component A preferably comprises 25-60 parts by weight of organic siloxane modified water-based hydroxyl acrylate emulsion, 1-20 parts by weight of filler, 1-2 parts by weight of hydrolysis control agent, 0.1-0.5 part by weight of dispersant, 0.1-0.5 part by weight of thickener, 0.1-0.5 part by weight of defoamer and 0.1-0.5 part by weight of flatting agent.
The component A further comprises pigment and water.
The filler preferably contains titanium dioxide, barium sulfate and silica powder. The hydrolysis controlling agent is preferably selected from potassium dihydrogen phosphate, NN-dimethylethanolamine, lactic acid, magnesium hydroxide or disodium hydrogen phosphate.
The formula of the component B further comprises hexamethylene diisocyanate, ditolyl methane diisocyanate and isophorone diisocyanate.
The component B further comprises an anhydrous solvent and a stabilizer.
The formula of the component B preferably comprises 10-20 parts by weight of organic siloxane, 20-40 parts by weight of hexamethylene diisocyanate, 5-10 parts by weight of ditolyl methane diisocyanate, 10-20 parts by weight of isophorone diisocyanate, 0.5-2 parts by weight of stabilizer and 10-40 parts by weight of anhydrous solvent.
The preparation method of the component B comprises the following steps: mixing the hexamethylene isocyanate, the ditolyl methane diisocyanate, the isophorone diisocyanate, the stabilizer and the anhydrous solvent in an anhydrous reaction kettle, stirring for 20-30 min, slowly adding the organic silicon monomer, and stirring for 20-30 min.
The invention also relates to a using method of the two-component waterborne polyurethane finishing coat for engineering machinery, wherein before use, the component A and the component B are mixed according to the proportion of the component A: mixing the component B at a weight ratio of 4:1, stirring uniformly, adding pure water as a diluent, stirring, curing for 30-60min, spraying, and baking at a low temperature of 30-80 ℃ to form a film.
The invention has the advantages that the hydrolysis and polycondensation reaction of siloxane exist in addition to the reaction of hydroxyl in the organic siloxane modified hydroxyl acrylic emulsion of the component A and isocyanate groups in the component B, on one hand, the hydrolysis of the siloxane can completely consume residual moisture in a paint film, and the release of carbon dioxide caused by adverse reaction of excessive NCO groups and the residual moisture is reduced, thereby fundamentally solving the problem that the paint film on the mechanical surface of the waterborne polyurethane engineering is easy to generate miliaria under the condition of thicker film thickness, and in addition, the silicon-oxygen structure in the coating increases the air permeability of the paint film, and has obvious effects of reducing pinhole dark bubble defects and releasing moisture. Due to the existence of multiple crosslinking, the organic siloxane modified two-component waterborne polyurethane finishing coat prepared by the invention can form a more compact crosslinking network, and has extremely high coating hardness, oil resistance, acid and alkali resistance, chemical resistance and excellent weather resistance.
Detailed Description
The present invention is further illustrated by the following examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Examples 1-4 are formulations and processes of organosiloxane modified two-component waterborne polyurethane engineering machinery topcoat.
Example 1:
the formula and the process of the component A are as follows:
sequentially putting the organic siloxane modified water-based hydroxyl acrylate emulsion, a hydrolysis control agent, a dispersing agent, a defoaming agent, a wetting agent, a thickening agent, a filler, a pigment and deionized water into a high-speed dispersion kettle, dispersing for 1h at a high speed, stirring at 1250r/min and at 40 ℃. The above components were then sanded to a fineness of less than 30 microns.
The formula and the process of the component B are as follows:
mixing the hexamethylene diisocyanate HDI, the ditolyl methane diisocyanate MDI, the aliphatic polyisocyanate IPDI, the stabilizer and the anhydrous solvent in an anhydrous reaction kettle, stirring for 20min, slowly adding the organic silicon, stirring for 20min, packaging, filling nitrogen and sealing.
Before use, the A/B components are mixed according to the proportion of 4:1 and stirred uniformly, pure water is added as a diluent, the mixture is stirred and cured for 30-60min, then spraying is carried out, and the mixture is baked at the low temperature of 30-80 ℃ to form a film.
Example 2:
the formula and the process of the component A are as follows:
sequentially putting the organic siloxane modified water-based hydroxyl acrylate emulsion, a hydrolysis control agent, a dispersing agent, a defoaming agent, a wetting agent, a thickening agent, a filler, a pigment and deionized water into a high-speed dispersion kettle, dispersing for 1h at a high speed, wherein the stirring speed is 1500r/min, and the temperature is 50 ℃. The above components were then sanded to a fineness of less than 30 microns.
The formula and the process of the component B are as follows:
mixing the hexamethylene diisocyanate HDI, the ditolyl methane diisocyanate MDI, the aliphatic polyisocyanate IPDI, the stabilizer and the anhydrous solvent in an anhydrous reaction kettle, stirring for 20min, slowly adding the organic silicon monomer, stirring for 30min, packaging, filling nitrogen and sealing.
Before use, the A/B components are mixed according to the proportion of 4:1 and stirred uniformly, pure water is added as a diluent, the mixture is stirred and cured for 30-60min, then spraying is carried out, and the mixture is baked at the low temperature of 30-80 ℃ to form a film.
Example 3:
the formula and the process of the component A are as follows:
sequentially putting the organic siloxane modified water-based hydroxyl acrylate emulsion, a hydrolysis control agent, a dispersing agent, a defoaming agent, a wetting agent, a thickening agent, a filler, a pigment and deionized water into a high-speed dispersion kettle, dispersing for 1h at a high speed, stirring at 1250r/min and at 40 ℃. The above components were then sanded to a fineness of less than 30 microns.
The formula and the process of the component B are as follows:
mixing the hexamethylene diisocyanate HDI, the ditolyl methane diisocyanate MDI, the aliphatic polyisocyanate IPDI, the stabilizer and the anhydrous solvent in an anhydrous reaction kettle, stirring for 30min, slowly adding the organic silicon monomer, stirring for 20min, packaging, filling nitrogen and sealing.
Before use, the A/B components are mixed according to the proportion of 4:1 and stirred uniformly, pure water is added as a diluent, the mixture is stirred and cured for 30-60min, then spraying is carried out, and the mixture is baked at the low temperature of 30-80 ℃ to form a film.
Example 4:
the formula and the process of the component A are as follows:
sequentially putting the organic siloxane modified water-based hydroxyl acrylate emulsion, a hydrolysis control agent, a dispersing agent, a defoaming agent, a wetting agent, a thickening agent, a filler, a pigment and deionized water into a high-speed dispersion kettle, dispersing for 1h at a high speed, stirring at 1250r/min and at 40 ℃. The above components were then sanded to a fineness of less than 30 microns.
The formula and the process of the component B are as follows:
mixing the hexamethylene diisocyanate HDI, the ditolyl methane diisocyanate MDI, the aliphatic polyisocyanate IPDI, the stabilizer and the anhydrous solvent in an anhydrous reaction kettle, stirring for 20min, slowly adding the organic silicon monomer, stirring for 20min, packaging, filling nitrogen and sealing.
Before use, the A/B components are mixed according to the proportion of 4:1 and stirred uniformly, pure water is added as a diluent, the mixture is stirred and cured for 30-60min, then spraying is carried out, and the mixture is baked at the low temperature of 30-80 ℃ to form a film.
Claims (9)
1. A two-component waterborne polyurethane finishing coat for engineering machinery comprises a component A and a component B, and is characterized in that:
the component A comprises organic siloxane modified water-based hydroxyl acrylate emulsion, the organic silicon accounts for 0.1-3.0% of the weight of the emulsion,
the component B comprises organic siloxane.
2. The two-component waterborne polyurethane finishing coat for engineering machinery of claim 1, wherein:
the organic siloxane used for modification in the component A adopts one or more of gamma-methacryloxypropyl trimethoxy siloxane, tri (dimethylamino) siloxane and gamma-aminopropyl-ethoxy siloxane,
the organic siloxane in the component B adopts one or more of SILANE A-187, gamma-aminopropyl triethoxy siloxane and methyl triethoxy siloxane.
3. The two-component waterborne polyurethane finishing coat for engineering machinery as claimed in claim 1, wherein the component A further comprises a filler, a hydrolysis control agent, a dispersant, a thickener, a defoamer and a leveling agent.
4. The two-component waterborne polyurethane finishing coat for engineering machinery as claimed in claim 3, wherein the component A comprises 25 to 60 parts by weight of organosiloxane modified waterborne hydroxy acrylate emulsion, 1 to 20 parts by weight of filler, 1 to 2 parts by weight of hydrolysis control agent, 0.1 to 0.5 part by weight of dispersant, 0.1 to 0.5 part by weight of thickener, 0.1 to 0.5 part by weight of defoamer and 0.1 to 0.5 part by weight of leveling agent.
5. The two-component waterborne polyurethane finishing coat for engineering machinery of claim 3 or 4, wherein the component A further comprises a pigment and water.
6. The two-component waterborne polyurethane finishing coat for engineering machinery of claim 1, wherein the component B further comprises hexamethylene diisocyanate, ditolyl methane diisocyanate, and isophorone diisocyanate.
7. The two-component waterborne polyurethane finishing coat for engineering machinery of claim 6, wherein the component B further comprises an anhydrous solvent and a stabilizer.
8. The two-component waterborne polyurethane finishing coat for engineering machinery of claim 7, wherein the component B comprises 10 to 20 parts by weight of organosiloxane, 20 to 40 parts by weight of hexamethylene diisocyanate, 5 to 10 parts by weight of xylylene diisocyanate, 10 to 20 parts by weight of isophorone diisocyanate, 0.5 to 2 parts by weight of stabilizer and 10 to 40 parts by weight of anhydrous solvent.
9. A use method of the two-component waterborne polyurethane finishing coat for engineering machinery as claimed in claim 1 ~ 8 is characterized in that before use, the component A and the component B are mixed according to the weight ratio of the component A to the component B of 4:1 and are uniformly stirred, pure water is added as a diluent, the mixture is stirred and cured for 30-60min and then is sprayed, and the mixture is baked at a low temperature of 30-80 ℃ to form a film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107219.0A CN110698964A (en) | 2019-11-13 | 2019-11-13 | Two-component waterborne polyurethane engineering machinery finish paint and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107219.0A CN110698964A (en) | 2019-11-13 | 2019-11-13 | Two-component waterborne polyurethane engineering machinery finish paint and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110698964A true CN110698964A (en) | 2020-01-17 |
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| CN201911107219.0A Pending CN110698964A (en) | 2019-11-13 | 2019-11-13 | Two-component waterborne polyurethane engineering machinery finish paint and use method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002060455A (en) * | 2000-08-11 | 2002-02-26 | Nicca Chemical Co Ltd | Two-liquid type aqueous resin composition and coating agent comprising the composition |
| CN102020917A (en) * | 2010-11-18 | 2011-04-20 | 青岛德鑫汽车涂料有限公司 | Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof |
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| CN110218511A (en) * | 2019-04-29 | 2019-09-10 | 上海立邦长润发涂料有限公司 | A kind of anti-aqueous double-component Brilliant white paint and its preparation process that heat rash appears |
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| JP2002060455A (en) * | 2000-08-11 | 2002-02-26 | Nicca Chemical Co Ltd | Two-liquid type aqueous resin composition and coating agent comprising the composition |
| CN102020917A (en) * | 2010-11-18 | 2011-04-20 | 青岛德鑫汽车涂料有限公司 | Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof |
| CN108727955A (en) * | 2017-04-20 | 2018-11-02 | 关西涂料株式会社 | The water-borne primer coating composition and coating process of multicomponent type |
| CN108864918A (en) * | 2018-07-30 | 2018-11-23 | 立邦涂料（中国）有限公司 | A kind of high-performance water-based two-component finish compositions, Preparation method and use |
| CN109852221A (en) * | 2019-01-08 | 2019-06-07 | 中海油常州涂料化工研究院有限公司 | A kind of low VOC and high performance dual-component aqueous polyurethane woodwork coating and preparation method thereof |
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