CN115960519A - Preparation method of coupling agent modified water-based UV (ultraviolet) wood finish - Google Patents
Preparation method of coupling agent modified water-based UV (ultraviolet) wood finish Download PDFInfo
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- CN115960519A CN115960519A CN202310148722.0A CN202310148722A CN115960519A CN 115960519 A CN115960519 A CN 115960519A CN 202310148722 A CN202310148722 A CN 202310148722A CN 115960519 A CN115960519 A CN 115960519A
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- coupling agent
- silica sol
- wood finish
- epoxy acrylate
- acrylate resin
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- 239000007822 coupling agent Substances 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000002023 wood Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 41
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical class C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims abstract description 41
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 39
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003085 diluting agent Substances 0.000 claims abstract description 27
- 239000003973 paint Substances 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 23
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 16
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 42
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 11
- NDAJNMAAXXIADY-UHFFFAOYSA-N 2-methylpropanimidamide Chemical compound CC(C)C(N)=N NDAJNMAAXXIADY-UHFFFAOYSA-N 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004821 distillation Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 239000003607 modifier Substances 0.000 claims description 7
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical group CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 7
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract description 5
- 239000006087 Silane Coupling Agent Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000004132 cross linking Methods 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000839 emulsion Substances 0.000 description 7
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- 229920002554 vinyl polymer Polymers 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000003848 UV Light-Curing Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000004922 lacquer Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 238000001723 curing Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical group [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a preparation method of coupling agent modified water-based UV wood finish, which comprises the following steps: stirring deionized water and a filler at a high speed in a reactor, then sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, dispersing uniformly, adding a coupling agent, and mixing uniformly. According to the water-based UV wood finish, the large-aperture alumina is added, so that the combination effect of the alumina and the organic raw material is improved; the organic silica sol modified by the alpha-silane coupling agent is adopted, so that the dispersion effect of the organic silica sol is improved; the flexible chain modified epoxy acrylate resin can effectively improve the crosslinking density among raw materials. The large-aperture alumina, the organic silica sol modified by the alpha-silane coupling agent and the flexible chain modified epoxy acrylate resin have a synergistic effect when used together, and the corrosion resistance and the salt spray resistance of the finish paint can be obviously improved.
Description
Technical Field
The invention relates to the technical field of finish paint, in particular to a preparation method of coupling agent modified water-based UV wood finish paint.
Background
Most of active diluents used in the traditional solvent type UV curing are acrylic functional monomers, the volume shrinkage is large after curing, the adhesive force of a coating layer is influenced, and the active diluents have certain volatility and are harmful to human bodies. The water-based UV curing coating does not contain diluent monomer, but uses water as diluent, can solve the toxicity and irritation of volatile components, and is a development direction of the coating. However, compared with the traditional UV curing coating, the current domestic water-based UV curing coating synthetic emulsion is mostly prepared by taking toluene diisocyanate as a raw material, the double bond content and the relative molecular mass are too low, and the mechanical property is poor. With the increasing market requirements for the comprehensive properties of the water-based paint, the comprehensive properties such as abrasion resistance, chemical resistance, hardness and the like need to be further improved, and thus the performance of the water-based UV paint is in need.
The Chinese invention patent CN108795259A discloses a waterborne organic silicon modified UV wood lacquer and a preparation method thereof, and the method improves the hardness, hand feeling, hydrophobicity, adhesive force, flame retardant property and acid and alkali resistance of the wood lacquer; however, the corrosion resistance and the salt spray resistance of the wood lacquer still need to be improved, which is not beneficial to the application of the finish in the special field, so that a preparation method of the coupling agent modified water-based UV wood finish is needed to be researched.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of coupling agent modified water-based UV wood finish.
The technical scheme of the invention is as follows:
a preparation method of coupling agent modified water-based UV wood finish paint comprises the following steps: stirring deionized water and a filler at a high speed in a reactor, then sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, dispersing uniformly, adding a coupling agent, and mixing uniformly.
Preferably, the coupling agent modified waterborne UV wood finish paint comprises the following components in parts by weight: 18-25% of filler, 8-12% of large-aperture alumina, 3-8% of organic silica sol, 15-25% of modified epoxy acrylate resin, 6-10% of reactive diluent, 1-2% of photoinitiator, 0.5-0.8% of defoamer, 1.8-2.5% of coupling agent and the balance of deionized water.
Preferably, the filler is any one or combination of more of superfine talcum powder, heavy calcium powder, light calcium powder, mica powder, kaolin, precipitated barium sulfate and silico-calcium powder.
Preferably, the large-aperture alumina has a specific surface area of 220-250m 2 The pore diameter is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
Preferably, the preparation method of the organic silicon sol comprises the following steps: adding alpha-mercaptosilane as a modifier into a basic silica sol solution, and carrying out heat preservation reaction at 60-65 ℃ for 6-8 hours; concentrating the reaction solution to 600-650g under reduced pressure; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
Preferably, the modified epoxy acrylate resin is a flexible chain modified epoxy acrylate resin.
Preferably, the reactive diluent is any one or combination of propylene oxide butyl ether and propylene oxide phenyl ether.
Preferably, the photoinitiator is 2, 2-azo-bis (2-amidinopropane) and the defoaming agent is tributyl phosphate.
The coupling agent is vinyl trialkoxysilane.
The invention has the advantages that: the preparation method of the coupling agent modified waterborne UV wood finish comprises the following steps: stirring deionized water and a filler at a high speed in a reactor, then sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, dispersing uniformly, adding a coupling agent, and mixing uniformly. According to the water-based UV wood finish, the large-aperture alumina is added, so that the combination effect of the alumina and the organic raw material is improved; the organic silica sol modified by the alpha-silane coupling agent is adopted, so that the dispersion effect of the organic silica sol is improved; the flexible chain modified epoxy acrylate resin can effectively improve the crosslinking density among raw materials. The large-aperture alumina, the organic silica sol modified by the alpha-silane coupling agent and the flexible chain modified epoxy acrylate resin have a synergistic effect when used together, and the corrosion resistance and the salt spray resistance of the finish paint can be obviously improved.
Detailed Description
Example 1
A preparation method of coupling agent modified water-based UV wood finish paint comprises the following steps: stirring deionized water and a filler at a high speed of 2300rpm in a reactor, sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, adjusting the stirring speed to 1080rpm, uniformly dispersing, adding a coupling agent, and uniformly mixing at 750 rpm.
The coupling agent modified waterborne UV wood finish paint comprises the following components in parts by weight: 22% of filler, 10% of large-aperture alumina, 5% of organic silica sol, 17% of modified epoxy acrylate resin, 8% of reactive diluent, 1.5% of photoinitiator, 0.7% of defoaming agent, 2.1% of coupling agent and the balance of deionized water.
The filler is superfine talcum powder.
The specific surface area of the large-aperture alumina is 220-250m 2 G, the aperture is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
The preparation method of the organic silicon sol comprises the following steps: adding 1.8g of alpha-mercaptosilane as a modifier into 1000g of basic silica sol solution, and carrying out heat preservation reaction at 62 ℃ for 7 hours; the reaction solution was concentrated under reduced pressure to 620g; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
The modified epoxy acrylate resin is flexible chain modified epoxy acrylate resin.
The reactive diluent is propylene oxide butyl ether.
The photoinitiator is 2, 2-azo-bis (2-amidinopropane), and the defoaming agent is tributyl phosphate.
The coupling agent is vinyl trialkoxysilane.
Example 2
A preparation method of coupling agent modified water-based UV wood finish paint comprises the following steps: stirring deionized water and a filler in a reactor at a high speed of 2500rpm, sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, adjusting the stirring speed to 1000rpm, uniformly dispersing, adding a coupling agent, and uniformly mixing at 800 rpm.
The coupling agent modified waterborne UV wood finish paint comprises the following components in parts by weight: 18% of filler, 12% of large-aperture alumina, 3% of organic silica sol, 25% of modified epoxy acrylate resin, 6% of reactive diluent, 2% of photoinitiator, 0.5% of defoaming agent, 2.5% of coupling agent and the balance of deionized water.
The filler is calcium silicate powder.
The specific surface area of the large-aperture alumina is 220-250m 2 The pore diameter is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
The preparation method of the organic silicon sol comprises the following steps: adding 1.5g of alpha-mercaptosilane as a modifier into 1000g of basic silica sol solution, and carrying out heat preservation reaction for 8 hours at 60 ℃; the reaction solution was concentrated under reduced pressure to 600g; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
The modified epoxy acrylate resin is flexible chain modified epoxy acrylate resin.
The reactive diluent is a combination of propylene oxide butyl ether and propylene oxide phenyl ether in a mass ratio of 3.
The photoinitiator is 2, 2-azo-bis (2-amidinopropane), and the defoaming agent is tributyl phosphate.
The coupling agent is vinyl trialkoxysilane.
Example 3
A preparation method of coupling agent modified water-based UV wood finish paint comprises the following steps: stirring deionized water and a filler at a high speed of 1800rpm in a reactor, sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, adjusting the stirring speed to 1250rpm, uniformly dispersing, adding a coupling agent, and uniformly mixing at 600 rpm.
The coupling agent modified waterborne UV wood finish paint is composed of the following components in parts by weight: 25% of filler, 8% of large-aperture alumina, 8% of organic silica sol, 15% of modified epoxy acrylate resin, 10% of reactive diluent, 1% of photoinitiator, 0.8% of defoaming agent, 1.8% of coupling agent and the balance of deionized water.
The filler is a combination of superfine talcum powder, heavy calcium powder and light calcium powder in a mass ratio of 5.
The specific surface area of the large-aperture alumina is 220-250m 2 The pore diameter is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
The preparation method of the organic silicon sol comprises the following steps: 2.4g of alpha-mercaptosilane as a modifier is added into 1000g of basic silica sol solution, and the temperature is kept at 65 ℃ for 6 hours; the reaction solution was concentrated under reduced pressure to 650g; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
The modified epoxy acrylate resin is flexible chain modified epoxy acrylate resin.
The reactive diluent is propylene oxide phenyl ether.
The photoinitiator is 2, 2-azo-bis (2-amidinopropane), and the defoaming agent is tributyl phosphate.
The coupling agent is vinyl trialkoxysilane.
Example 4
A preparation method of coupling agent modified water-based UV wood finish comprises the following steps: stirring deionized water and a filler at a high speed of 2350rpm in a reactor, sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, adjusting the stirring speed to 1000rpm, uniformly dispersing, adding a coupling agent, and uniformly mixing at 750 rpm.
The coupling agent modified waterborne UV wood finish paint is composed of the following components in parts by weight: 20% of filler, 12% of large-aperture alumina, 4.5% of organic silica sol, 25% of modified epoxy acrylate resin, 6.5% of reactive diluent, 2% of photoinitiator, 0.7% of defoaming agent, 2.5% of coupling agent and the balance of deionized water.
The filler is a combination of mica powder and kaolin in a mass ratio of 1.
The specific surface area of the large-aperture alumina is 220-250m 2 The pore diameter is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
The preparation method of the organic silicon sol comprises the following steps: 2.7g of alpha-mercaptosilane as a modifier is added into 1000g of basic silica sol solution, and the temperature is kept at 62 ℃ for reaction for 6.5 hours; the reaction solution was concentrated under reduced pressure to 615g; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
The modified epoxy acrylate resin is flexible chain modified epoxy acrylate resin.
The reactive diluent is a combination of 2 mass percent of epoxypropane butyl ether and 3 mass percent of epoxypropane phenyl ether.
The photoinitiator is 2, 2-azo-bis (2-amidinopropane), and the defoaming agent is tributyl phosphate.
The coupling agent is vinyl trialkoxysilane.
Example 5
A preparation method of coupling agent modified water-based UV wood finish comprises the following steps: stirring deionized water and a filler at a high speed of 1800rpm in a reactor, sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, adjusting the stirring speed to 10080rpm, uniformly dispersing, adding a coupling agent, and uniformly mixing at 650 rpm.
The coupling agent modified waterborne UV wood finish paint comprises the following components in parts by weight: 18% of filler, 10.5% of large-aperture alumina, 3% of organic silica sol, 21% of modified epoxy acrylate resin, 6% of reactive diluent, 1.5% of photoinitiator, 0.5% of defoaming agent, 2.5% of coupling agent and the balance of deionized water.
The filler is mica powder.
The specific surface area of the large-aperture alumina is 220-250m 2 The pore diameter is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
The preparation method of the organic silicon sol comprises the following steps: 1.8g of alpha-mercaptosilane as a modifier is added into 1000g of basic silica sol solution, and the reaction is carried out for 7.5 hours at the temperature of 64 ℃; the reaction solution was concentrated under reduced pressure to 625g; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
The modified epoxy acrylate resin is flexible chain modified epoxy acrylate resin.
The reactive diluent is propylene oxide butyl ether.
The photoinitiator is 2, 2-azo-bis (2-amidinopropane), and the defoaming agent is tributyl phosphate.
The coupling agent is vinyl trialkoxy silane.
Comparative example 1
The large pore size alumina in example 1 was replaced with conventional nano alumina.
Comparative example 2
The organic silicon sol in the example 1 is replaced by organic silicon UV resin emulsion with equal Si element content (the preparation method of the organic silicon UV resin emulsion refers to the Chinese invention patent CN108795259A example 1).
Comparative example 3
The flexible chain modified epoxy acrylate resin in example 1 was replaced with the epoxy acrylate resin in example 1 of chinese patent CN 104974658A.
Comparative example 4
The large-aperture alumina in the example 1 is replaced by the conventional nano alumina, and the organic silica sol in the example 1 is replaced by the organic silica UV resin emulsion containing equal Si element (the preparation method of the organic silica UV resin emulsion refers to the Chinese patent CN108795259A in the example 1).
Comparative example 5
The flexible chain modified epoxy acrylate resin in example 1 is replaced by the epoxy acrylate resin in example 1 of chinese patent CN104974658A, and the silicone sol in example 1 is replaced by the silicone UV resin emulsion containing equal amount of Si element (the preparation method of the silicone UV resin emulsion refers to CN108795259A in example 1 of chinese patent CN).
Comparative example 6
The large-aperture alumina in the example 1 is replaced by the conventional nano alumina, and the flexible chain modified epoxy acrylate resin in the example 1 is replaced by the epoxy acrylate resin in the example 1 of the chinese patent CN 104974658A.
Comparative example 7
The UV wood lacquer prepared in example 4 of China invention patent CN108795259A was used as a control.
Test example
Under the same conditions, the coupling agent modified waterborne UV wood finish prepared in the above examples 1-5 and the comparative examples 1-7 are sprayed on the surface of a nanmu with the same specification (the thickness of the paint film is about 150 microns) under the same conditions, after the surface is dried, the examples 1-5 and the comparative examples 1-7 are irradiated for 60s at a position of 18cm under ultraviolet light with the wavelength of 365nm for curing, and the paint film performance results of the tested wood according to the relevant standards are shown in the following table 1.
Wherein: the paint film hardness test method refers to GB/T6739-2006; the acid corrosion resistance test method refers to GB/T1763-1979; the salt spray resistance test method refers to GB/T1771-2007; the water resistance test method is described in GB/T1733-1993.
Tables 1 to 1: woodware paint film performance comparison test results (adhesive force, paint film hardness and water resistance);
tables 1 to 2: woodware paint film performance comparison test results (acid corrosion resistance and salt spray resistance);
the test data show that the modified water-based UV wood finish prepared by the invention has very good acid corrosion resistance and acid corrosion resistance, and especially, the large-aperture alumina, the organic silica sol and the flexible chain modified epoxy acrylate resin adopted by the invention directly have a synergistic effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A preparation method of coupling agent modified water-based UV wood finish paint is characterized by comprising the following steps: stirring deionized water and a filler in a reactor at a high speed, then sequentially adding large-aperture alumina, organic silica sol, modified epoxy acrylate resin, a reactive diluent, a photoinitiator and a defoaming agent, dispersing uniformly, adding a coupling agent, and mixing uniformly.
2. The preparation method of the coupling agent modified waterborne UV wood finish paint of claim 1, wherein the coupling agent modified waterborne UV wood finish paint comprises the following components in parts by weight: 18-25% of filler, 8-12% of large-aperture alumina, 3-8% of organic silica sol, 15-25% of modified epoxy acrylate resin, 6-10% of reactive diluent, 1-2% of photoinitiator, 0.5-0.8% of defoaming agent, 1.8-2.5% of coupling agent and the balance of deionized water.
3. The method for preparing coupling agent modified waterborne UV wood finish according to claim 1, wherein the filler is any one or a combination of more of ultrafine talcum powder, heavy calcium powder, light calcium powder, mica powder, kaolin, precipitated barium sulfate and silicon calcium powder.
4. The preparation method of the coupling agent modified waterborne UV wood finish paint of claim 1, wherein the specific surface area of the large-aperture alumina is 220-250m 2 The pore diameter is 10-20nm; the pore volume is 0.7-1.2cm 3 /g。
5. The preparation method of the coupling agent modified waterborne UV wood finish as claimed in claim 4, wherein the preparation method of the organic silica sol comprises the following steps: adding alpha-mercaptosilane as a modifier into a basic silica sol solution, and carrying out heat preservation reaction at 60-65 ℃ for 6-8 hours; concentrating the reaction solution to 600-650g under reduced pressure; distilling and replacing ethanol and water in the solution by using methyl ethyl ketone under normal pressure under the condition of keeping the concentration of the solution unchanged, wherein the temperature of a distillation head reaches the boiling point (79.5 ℃) of the methyl ethyl ketone as an end point; cooling to room temperature, and filtering with a 3um filter membrane to obtain the organic modified silica sol.
6. The method for preparing the coupling agent modified waterborne UV wood finish according to claim 1, wherein the modified epoxy acrylate resin is a flexible chain modified epoxy acrylate resin.
7. The method for preparing the coupling agent modified waterborne UV wood finish according to claim 1, wherein the reactive diluent is any one or a combination of propylene oxide butyl ether and propylene oxide phenyl ether.
8. The method for preparing the coupling agent modified waterborne UV wood finish according to claim 1, wherein the photoinitiator is 2, 2-azo-bis (2-amidinopropane), and the defoaming agent is tributyl phosphate.
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