CN116355450A - Low-surface-treatment polysiloxane coating and preparation method thereof - Google Patents
Low-surface-treatment polysiloxane coating and preparation method thereof Download PDFInfo
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- CN116355450A CN116355450A CN202310381879.8A CN202310381879A CN116355450A CN 116355450 A CN116355450 A CN 116355450A CN 202310381879 A CN202310381879 A CN 202310381879A CN 116355450 A CN116355450 A CN 116355450A
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- 238000000576 coating method Methods 0.000 title claims abstract description 73
- 239000011248 coating agent Substances 0.000 title claims abstract description 67
- 229920001296 polysiloxane Polymers 0.000 title claims abstract description 41
- -1 polysiloxane Polymers 0.000 title claims abstract description 40
- 238000004381 surface treatment Methods 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 69
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 39
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- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 239000000049 pigment Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 17
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims abstract description 15
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000178 monomer Substances 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000001723 curing Methods 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 31
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- 238000009775 high-speed stirring Methods 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 claims description 5
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 230000002401 inhibitory effect Effects 0.000 claims description 5
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 claims description 4
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 4
- 125000005210 alkyl ammonium group Chemical group 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- 229920001400 block copolymer Polymers 0.000 claims description 4
- 239000004359 castor oil Substances 0.000 claims description 4
- 235000019438 castor oil Nutrition 0.000 claims description 4
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 3
- MWOZJZDNRDLJMG-UHFFFAOYSA-N [Si].O=C=O Chemical compound [Si].O=C=O MWOZJZDNRDLJMG-UHFFFAOYSA-N 0.000 claims description 2
- 239000013522 chelant Substances 0.000 abstract description 3
- 238000010668 complexation reaction Methods 0.000 abstract description 3
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- 239000010410 layer Substances 0.000 description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 12
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
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- 229920000180 alkyd Polymers 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 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 5
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 5
- 229910000165 zinc phosphate Inorganic materials 0.000 description 5
- 125000003277 amino group Chemical group 0.000 description 4
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229910021485 fumed silica Inorganic materials 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
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- 238000009396 hybridization Methods 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 235000010215 titanium dioxide Nutrition 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
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- 125000003700 epoxy group Chemical group 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011527 polyurethane coating Substances 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000007142 ring opening reaction Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
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- JOLVYUIAMRUBRK-UHFFFAOYSA-N 11',12',14',15'-Tetradehydro(Z,Z-)-3-(8-Pentadecenyl)phenol Natural products OC1=CC=CC(CCCCCCCC=CCC=CCC=C)=C1 JOLVYUIAMRUBRK-UHFFFAOYSA-N 0.000 description 1
- YLKVIMNNMLKUGJ-UHFFFAOYSA-N 3-Delta8-pentadecenylphenol Natural products CCCCCCC=CCCCCCCCC1=CC=CC(O)=C1 YLKVIMNNMLKUGJ-UHFFFAOYSA-N 0.000 description 1
- OEOIWYCWCDBOPA-UHFFFAOYSA-N 6-methyl-heptanoic acid Chemical compound CC(C)CCCCC(O)=O OEOIWYCWCDBOPA-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- JOLVYUIAMRUBRK-UTOQUPLUSA-N Cardanol Chemical compound OC1=CC=CC(CCCCCCC\C=C/C\C=C/CC=C)=C1 JOLVYUIAMRUBRK-UTOQUPLUSA-N 0.000 description 1
- FAYVLNWNMNHXGA-UHFFFAOYSA-N Cardanoldiene Natural products CCCC=CCC=CCCCCCCCC1=CC=CC(O)=C1 FAYVLNWNMNHXGA-UHFFFAOYSA-N 0.000 description 1
- 238000006845 Michael addition reaction Methods 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
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- 239000002671 adjuvant Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- PTFIPECGHSYQNR-UHFFFAOYSA-N cardanol Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1 PTFIPECGHSYQNR-UHFFFAOYSA-N 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- FIRQYUPQXNPTKO-UHFFFAOYSA-N ctk0i2755 Chemical compound N[SiH2]N FIRQYUPQXNPTKO-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 238000004383 yellowing Methods 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- 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
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
-
- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of coatings, and particularly relates to a polysiloxane coating with low surface treatment and a preparation method thereof. The coating mainly comprises a main agent and a curing agent, wherein the weight ratio of the main agent to the curing agent is 20-25:4-6; the main agent is mainly prepared from the following raw materials in parts by weight: 25-35 parts of organosilicon intermediate, 10-20 parts of acrylic acid monomer, 10-15 parts of epoxy resin, 0.2-0.5 part of dispersing agent, 1-2 parts of thixotropic agent, 21-32 parts of active rust-proof pigment and 15-21 parts of zinc-aluminum alloy powder; the curing agent is mainly prepared from the following raw materials in parts by weight: 90-95 parts of bisaminosilane oligomer and 5-10 parts of catalyst. The low-surface-treatment polysiloxane coating has extremely low viscosity and low surface tension due to the extremely low viscosity of a film forming material, so that the low-surface-treatment polysiloxane coating has an extremely good wetting and penetrating effect on loose rust and firmly wraps and fixes the rust in a separated manner; by adding the active rust-proof pigment, the active rust is subjected to a complexation reaction with the rust, and is converted into indissolvable stable chelate.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a polysiloxane coating with low surface treatment and a preparation method thereof.
Background
The coatings currently used for low surface treatment rust coating are classified into 4 categories, namely epoxy resins, polyurethane resins, thermoplastic acrylic resins and alkyd resins, based on the main film former classification.
The existing epoxy resin coating for low-surface treatment rust coating is usually liquid epoxy resin, the curing of the epoxy resin coating is sensitive to temperature, the reaction is slow at 10 ℃, and the reaction is very slow at 5 ℃, for example, the reaction is basically no longer carried out at less than 0 ℃, so that the construction limitation is great. The epoxy resin contains aromatic ether bond, and the cured product is easy to degrade and break the chain under the irradiation of solar ultraviolet rays, so that the coating is not ultraviolet-resistant, has poor weather resistance, is easy to pulverize outdoors and needs to be matched with weather-resistant finish paint.
The polyurethane coating with rust is mostly made of MDI and TDI oligomer compounded film forming substances, free TDI can greatly harm human bodies and cause environmental pollution, and the MDI and TDI of aromatic polyurethane containing benzene rings are poor in weather resistance, and the coating is outdoor exposed to sunlight and is easy to yellow, fade and pulverize.
Alkyd and acrylic acid are limited in application under the technical background of low carbon and environmental protection, high efficiency and energy conservation and the like at present due to the fact that the solid content of the resin is low, VOC is high after paint preparation, the thickness of one-time film forming is low, the corrosion resistance and rust stability are poor and the like.
Therefore, there is a great need to develop a novel low surface treatment coating with excellent performance and environmental protection.
Disclosure of Invention
The invention aims to provide a polysiloxane coating with low surface treatment and a preparation method thereof, which are used for solving the technical problems of slow low-temperature curing and poor weather resistance of an epoxy resin coating, high toxicity and poor weather resistance of free TDI (toluene diisocyanate) of a polyurethane coating, high non-environment protection performance of alkyd and acrylic acid with low solid content of VOC, poor corrosion resistance and rust stability and the like in the prior art.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
in a first aspect, the invention provides a low surface treatment polysiloxane coating, which mainly comprises a main agent and a curing agent, wherein the weight ratio of the main agent to the curing agent is 20-25:4-6;
the main agent is mainly prepared from the following raw materials in parts by weight: 25-35 parts of organosilicon intermediate, 10-20 parts of acrylic acid monomer, 10-15 parts of epoxy resin, 1.2-2.5 parts of auxiliary agent, 21-32 parts of active rust-proof pigment and 15-21 parts of zinc-aluminum alloy powder;
the curing agent is mainly prepared from the following raw materials in parts by weight: 90-95 parts of aminosilane oligomer and 5-10 parts of catalyst.
The invention can be further improved on the basis of the technical scheme as follows:
further, in a preferred embodiment of the present invention, the silicone intermediate comprises a methylphenyl silicone oligomer.
Further, in a preferred embodiment of the present invention, the acrylic monomer includes at least one of 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate and trimethylolpropane trimethacrylate.
Further, in a preferred embodiment of the present invention, the epoxy resin comprises a hydrogenated epoxy resin.
Further, in a preferred embodiment of the present invention, the above-mentioned active rust inhibitive pigment comprises at least one of phosphate, molybdate, borate and zinc oxide.
Further, in a preferred embodiment of the present invention, the catalyst is an organobismuth catalyst.
Further, in a preferred embodiment of the present invention, the above-mentioned auxiliary agents include a dispersant and a thixotropic agent.
Further, in a preferred embodiment of the present invention, the thixotropic agent comprises at least one of hydrogenated castor oil, bentonite and silicon.
Further, in a preferred embodiment of the present invention, the dispersant includes at least one of an alkyl ammonium salt solution of a polycarboxylic acid, a phosphoric acid ester and a modified polyurethane block copolymer.
In a second aspect, the present invention provides a method for preparing the low surface treatment polysiloxane coating, which is characterized in that the method comprises the following steps:
adding an organosilicon intermediate, an acrylic acid monomer and epoxy resin into a container A in proportion, and uniformly stirring at medium speed to prepare a mixture a;
adding the auxiliary agent into the mixture a in proportion under the low-speed stirring state, stirring uniformly, adjusting to high-speed stirring, adding the active rust-proof pigment and the zinc-aluminum alloy powder under the high-speed stirring state, dispersing until the fineness is less than or equal to 60 mu m, and filtering to obtain a main agent;
adding an aminosilane oligomer and a catalyst into a container B according to a certain proportion, uniformly mixing, and filtering to obtain a curing agent;
and uniformly mixing the main agent and the curing agent according to the weight ratio to obtain the polysiloxane coating with low surface treatment.
Further, in the preferred embodiment of the present invention, the low-speed stirring speed is 300-600rpm, the medium-speed stirring speed is 700-1200rpm, and the high-speed stirring speed is 1300-2000rpm.
Compared with the prior art, the invention has at least the following technical effects:
the organosilicon intermediate in the components contains a framework of a silicon-oxygen bond (-Si-O-Si-) and is used as a main film forming substance of acrylic acid monomer and epoxy resin containing double bonds, so that the surface tension is low and the viscosity is extremely low, and the wettability and the permeability to a rust layer are excellent;
the active rust-proof pigment is matched, and hydrolyzed active ions and rust undergo complexation reactions such as phosphating and passivation, so that the active rust is converted into indissolvable chelate to achieve the aim of stabilizing the rust;
no organic solvent is introduced in the preparation process, and the preparation method meets the technical requirements of low carbon and environmental protection; the silica bond is more than 15%, the weather resistance is excellent, the finish paint is not required after rust coating, the paint can be used as primer-topcoat paint, and the construction cost is reduced.
Under the action of a catalyst, the acrylic acid containing double bonds and amino groups in an aminosilane oligomer in a curing agent undergo Michael addition reaction, meanwhile, the amino groups in the curing agent and epoxy groups undergo ring-opening reaction, the aminosilane oligomer and an organosilicon intermediate undergo hydrolysis reaction, the outdoor temperature fluctuation has little influence on the reaction speed, and the reaction curing speed is accelerated in a rust layer due to the existence of water vapor and crystal water; the organic-inorganic hybridization reaction and the polymer network structure make the rusted coating not only have the chemical stability and inertness of inorganic matters, but also have the flexibility and ductility of organic matters, and the coating has excellent corrosion resistance.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the following examples, which are to be construed as merely illustrative and not limitative of the scope of the invention, but are not intended to limit the scope of the invention to the specific conditions set forth in the examples, either as conventional or manufacturer-suggested, nor are reagents or apparatus employed to identify manufacturers as conventional products available for commercial purchase.
The general idea of the technical scheme provided by the embodiment of the invention is as follows:
in a first aspect, embodiments of the present application provide a low surface treatment polysiloxane coating, the coating mainly comprises a main agent and a curing agent, wherein the weight ratio of the main agent to the curing agent is 20-25:4-6;
the main agent is mainly prepared from the following raw materials in parts by weight: 25-35 parts of organosilicon intermediate, 10-20 parts of acrylic acid monomer, 10-15 parts of epoxy resin, 1.2-2.5 parts of auxiliary agent, 21-32 parts of active rust-proof pigment and 15-21 parts of zinc-aluminum alloy powder;
the curing agent is mainly prepared from the following raw materials in parts by weight: 90-95 parts of aminosilane oligomer and 5-10 parts of catalyst.
In some embodiments, the above-described coating may be modified as follows:
in some embodiments, the silicone intermediate is a methylphenyl silicone oligomer having a molecular weight of 200-1000.
In some embodiments, the aminosilane oligomer has a molecular weight of 200 to 1000.
In the above molecular weight range, the rust layer is excellent in wet permeability because of its low surface tension and low viscosity.
In some embodiments, the silicone intermediate comprises a methylphenyl silicone oligomer.
In some embodiments, the acrylic monomer includes at least one of 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate and trimethylolpropane trimethacrylate.
In some embodiments, the epoxy resin described above comprises a hydrogenated epoxy resin.
The hydrogenated epoxy resin molecular chain has no benzene ring or alicyclic ring, and has good yellowing resistance; and the hydrogenated epoxy resin has excellent adhesive force and flexibility, and the adhesive force and the cohesive force of the coating can be obviously optimized after the hydrogenated epoxy resin is added.
In some embodiments, the active rust inhibitive pigment comprises at least one of a phosphate, a molybdate, a borate, and zinc oxide. The phosphate, molybdate, borate and zinc oxide hydrolyzed active ion salt carry out phosphating passivation complexation reaction on the rust layer, so that the rust is converted into a stable inhibition compound, and the whole rust layer becomes a stable protective film.
In some embodiments, the catalyst is an organobismuth based catalyst.
In some specific embodiments, the above-described adjuvants include dispersants and thixotropic agents; the thixotropic agent comprises at least one of hydrogenated castor oil, bentonite and gaseous carbon dioxide silicon; the dispersant comprises at least one of an alkyl ammonium salt emulsion of a polycarboxylic acid, a phosphate ester and a modified polyurethane block copolymer.
In some embodiments, the thixotropic agent is present in an amount of 0.2 to 0.5 parts and the thixotropic agent is present in an amount of 1 to 2 parts.
In some embodiments, the zinc-aluminum alloy powder is a zinc-aluminum alloy powder with a sheet structure.
The zinc-aluminum alloy powder adopting the flaky structure has good ductility, higher specific surface area of scales and excellent metallic luster, and greatly improves the flexibility, the corrosion resistance and the light and heat reflectivity of the coating.
In a second aspect, the present invention provides a method for preparing the low surface treatment polysiloxane coating described above, the method comprising the steps of:
adding an organosilicon intermediate, an acrylic acid monomer and epoxy resin into a container A in proportion, and uniformly stirring at 700-1200rpm to obtain a mixture a;
adding the auxiliary agent into the mixture a in proportion under the stirring state of 300-600rpm, uniformly stirring, adjusting the stirring speed to 1300-2000rpm, adding the active rust-proof pigment and the zinc-aluminum alloy powder under the stirring speed of 1300-2000rpm, dispersing until the fineness is less than or equal to 60 mu m, and filtering to obtain a main agent;
adding an aminosilane oligomer and a catalyst into a container B according to a certain proportion, uniformly mixing, and filtering to obtain a curing agent;
and uniformly mixing the main agent and the curing agent according to the weight ratio to obtain the polysiloxane coating with low surface treatment.
In summary, the present invention has at least the following advantages:
(1) The polysiloxane coating with low surface treatment provided by the embodiment of the application has the advantages that the organosilicon intermediate with a siloxane bond (-Si-O-Si-) as a framework, an acrylic monomer with double bonds and an epoxy resin as main film forming matters have the molecular weight of 200-1000, and the surface tension and the viscosity are low, so that the polysiloxane coating with low surface tension and extremely low viscosity has excellent wettability and permeability to a rust layer;
(2) Through the combination of the active rust-proof pigment, the active rust-proof pigment generates active ions to carry out complex reactions such as phosphating and passivation on the rust after hydrolysis reaction, so that the active rust is converted into indissolvable chelate, and the aim of stabilizing the rust is fulfilled;
(3) The preparation process has no organic solvent introduction, and the effective components can reach 100%, thereby meeting the technical requirements of low carbon and environmental protection;
(4) By controlling the amount of the organosilicon intermediate, the silicon-oxygen bond is ensured to be more than 15%, the weather resistance is excellent, the finish paint is not required to be applied after rust coating, the paint can be used as a primer-topcoat paint, and the construction cost is reduced;
(5) The amino silane oligomer is matched as a curing agent, and the amino silane oligomer in the curing agent and the acrylic acid containing double bonds react with the amino groups in the double amino silane oligomer under the action of a catalyst, meanwhile, the amino groups in the curing agent react with epoxy groups in a ring opening manner, the double amino silane oligomer reacts with an organosilicon intermediate in a hydrolysis manner, the influence of outdoor temperature fluctuation on the reaction speed of the raw materials is small, and the reaction curing speed of the rust layer is accelerated due to the existence of water vapor and crystal water;
(6) The bisaminosilane oligomer used as the curing agent can improve the moisture crosslinking curing rate of the paint in the rust layer, improve the adhesive force in a wet state, improve the tensile strength and the modulus and have excellent weather resistance. The synergistic effect of the components generates organic-inorganic hybridization reaction, and the interpenetrating polymer network structure ensures that the rusted coating has the chemical stability and inertness of inorganic matters, and has the flexibility and ductility of organic matters, and the coating has excellent corrosion resistance.
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Some reagent models and purchasers in the following embodiments of the present invention are as follows:
methyl phenyl silicone oligomer: DOWSILTM3074, dow
Aminosilane oligomer: winning Dynasylan 1146
Organobismuth catalyst: borchers
Kat315EU
Hydrogenated epoxy resin: ai Dike 4080E
325 mesh flake zinc-aluminum alloy powder: hunan Jin science and technology ZNAL20-1
Example 1
This example also provides a low surface treatment polysiloxane coating, wherein the coating compositions of examples 1-3 are shown in Table 1
TABLE 1
| Raw material (Unit: kg) | Example 1 | Example 2 | Example 3 |
| Mass (kg) of main agent and curing agent | 50:10 | 40:10 | 60:10 |
| Methylphenyl silicone oligomers | 29 | 30 | 25 |
| 1, 6-hexanediol diacrylate (HDDA) | 15 | / | / |
| Tripropylene glycol diacrylate (TPGDA) | / | 15 | / |
| Trimethylolpropane trimethacrylate (TMPTMA) | / | 3 | 15 |
| Hydrogenation ringOxygen resin | 15 | 10 | 10 |
| Organic modified bentonite SD-1 | 1.5 | / | / |
| Hydrogenated castor oil ST | / | 1.8 | / |
| Hydrophobic fumed silica | / | / | 2 |
| Alkyl ammonium salt emulsion of polycarboxylic acid | 0.2 | 0.1 | / |
| Phosphoric acid esters | / | 0.1 | / |
| Modified polyurethane block copolymers | / | / | 0.2 |
| Zinc phosphate | 21 | / | / |
| Molybdate salt | / | 10 | 20 |
| Borates | / | 12 | 10 |
| 325 mesh flake zinc-aluminum alloy powder | 18.3 | 18 | 17.8 |
| Bis-aminosilane oligomers | 90 | 95 | 92 |
| Organobismuth catalysts | 10 | 5 | 8 |
This example provides a method for preparing a low surface treatment polysiloxane coating,
adding an organosilicon intermediate, an acrylic acid monomer and epoxy resin into a reaction kettle A, and uniformly stirring at 1000rpm to obtain a mixture a;
1.5 parts of thixotropic agent and 0.2 part of dispersing agent are added into the mixture a in proportion under the stirring state of 500rpm, the stirring speed is regulated to 1500rpm, and active rust-proof pigment and zinc-aluminum alloy powder are added into the mixture a under the stirring speed of 1500rpm to disperse until the fineness is less than or equal to 60 mu m, and the mixture a is filtered to obtain a main agent;
adding an aminosilane oligomer and a catalyst into a reaction kettle B, uniformly mixing, and filtering to obtain a curing agent;
and uniformly mixing the main agent and the curing agent according to the weight ratio to obtain the polysiloxane coating with low surface treatment.
Example 2
This example provides a method for preparing a low surface treatment polysiloxane coating,
adding an organosilicon intermediate, an acrylic acid monomer and epoxy resin into a reaction kettle A, and uniformly stirring at 700rpm to obtain a mixture a;
1.5 parts of thixotropic agent and 0.2 part of dispersing agent are added into the mixture a in proportion under the stirring state of 600rpm, the stirring speed is regulated to 2000rpm, and active rust-proof pigment and zinc-aluminum alloy powder are added under the stirring speed of 2000rpm to disperse until the fineness is less than or equal to 60 mu m, and the main agent is obtained after filtration;
adding an aminosilane oligomer and a catalyst into a reaction kettle B, uniformly mixing, and filtering to obtain a curing agent;
and uniformly mixing the main agent and the curing agent according to the weight ratio to obtain the polysiloxane coating with low surface treatment.
Example 3
This example provides a method for preparing a low surface treatment polysiloxane coating,
adding an organosilicon intermediate, an acrylic acid monomer and epoxy resin into a reaction kettle A, and uniformly stirring at 1200rpm to obtain a mixture a;
1.5 parts of thixotropic agent and 0.2 part of dispersing agent are added into the mixture a in proportion under the stirring state of 300rpm, the stirring speed is regulated to 1300rpm, and active rust-proof pigment and zinc-aluminum alloy powder are added into the mixture a under the stirring speed of 1300rpm to be dispersed until the fineness is less than or equal to 60 mu m, and the mixture a is filtered to obtain a main agent;
adding an aminosilane oligomer and a catalyst into a reaction kettle B, uniformly mixing, and filtering to obtain a curing agent;
and uniformly mixing the main agent and the curing agent according to the weight ratio to obtain the polysiloxane coating with low surface treatment.
Comparative example 1
The comparative example provides an epoxy low surface treatment coating, which comprises a main agent and a curing agent, wherein the weight ratio of the main agent to the curing agent is 6:1, the preparation method comprises the following steps:
preparing a main agent: adding 47.5 parts of liquid epoxy E51,2.5 parts of active diluent AGE into a reaction kettle, adding 1.5 parts of organic bentonite under uniform stirring for high-speed dispersion for 15 minutes, adding 0.2 part of dispersing agent, 15 parts of rutile type titanium pigment, 20 parts of zinc phosphate, 5 parts of aluminum tripolyphosphate and 3.3 parts of 800-mesh barium sulfate under uniform stirring, dispersing 5 parts of dimethylbenzene for 30 minutes to fineness less than 60 mu m at high speed, filtering, discharging and packaging to obtain a main agent;
preparing a curing agent: adding 80 parts of cardanol modified polyamide and 20 parts of dimethylbenzene into a reaction kettle, and uniformly mixing the materials to obtain a curing agent;
and during construction operation, the main agent and the curing agent are mixed and stirred uniformly according to a proportion, and the epoxy low-surface treatment coating is obtained.
Comparative example 2.
The comparative example provides a single-component polyurethane resin low-surface treatment coating, which is prepared by the following steps:
introducing nitrogen into a reaction kettle, adding 50 parts of aromatic polyisocyanate, 0.5 part of dispersing agent, 1.5 parts of hydrophobic fumed silica, 15 parts of rutile type titanium dioxide, 20 parts of zinc phosphate, 7 parts of barium sulfate and 6 parts of butyl acetate under low-speed stirring, dispersing at high speed for 30mins until the fineness is less than 50 mu m, and filtering and packaging to obtain the polyurethane foam.
During construction operation, the viscosity of the paint is regulated by propylene glycol methyl ether acetate.
Comparative example 3.
The comparative example provides a single-component alkyd resin low-surface treatment coating, which is prepared by the following steps:
50 parts of long-oil alkyd resin, 0.5 part of dispersing agent, 1.5 parts of hydrophobic fumed silica, 12 parts of rutile type titanium white powder, 15 parts of zinc phosphate, 7 parts of barium sulfate and 13 parts of dimethylbenzene are added into a reaction kettle, dispersed at a high speed for 30 minutes until the fineness is less than 50 mu m, and then 1 part of isooctanoic acid drier is added, uniformly stirred at a low speed, filtered and packaged to obtain the modified alkyd resin.
During construction operation, the paint can be operated by adjusting the viscosity with dimethylbenzene.
Comparative example 4
The comparative example provides a single component acrylic low surface treatment coating prepared as follows:
50 parts of thermoplastic acrylic resin, 0.5 part of dispersing agent, 1.5 parts of hydrophobic fumed silica, 12 parts of rutile type titanium white powder, 15 parts of zinc phosphate, 7 parts of barium sulfate and 14 parts of dimethylbenzene are added into a reaction kettle, dispersed at high speed for 30 minutes until the fineness is less than 50 mu m, and filtered and packaged to obtain the high-performance high-strength thermoplastic acrylic resin.
During construction operation, the paint can be operated by adjusting the viscosity with dimethylbenzene.
Comparative example 5
This comparative example also provides a low surface treatment polysiloxane coating and a preparation method thereof, wherein the coating and the preparation method are the same as those of example 1, and only the methylphenylsilicone oligomer of example 1 is replaced with the methyl silicate oligomer,
comparative example 6
This comparative example also provides a low surface treatment polysiloxane coating and a preparation method thereof, wherein the coating and preparation method are the same as in example 1, and only the hydrogenated epoxy resin in example 1 is replaced with bisphenol A epoxy resin
Test example:
experimental tests were carried out on the coatings of low surface treatment polysiloxane coatings examples 1,2, 3 and comparative examples 1-4;
the low surface treatment polysiloxane coating is obtained by uniformly stirring a main agent and a curing agent according to the mass ratio during construction operation of the coating in the embodiments 1,2 and 3, and is tested according to the test standard, wherein the test standard refers to HG/T4564-2013, HG/T4755-2014 and GB/T50393-2017 annex A, and the inspection result is shown in Table 2:
TABLE 2
From the above results, the viscosity of the coatings of examples 1 to 3 was between 72 and 75ku on the premise that the effective fraction reached 99.9%, the wettability and permeability to the old paint film and rust layer were excellent, the pull-off adhesion was between 16.3mpa and 18.6mpa, the pull-off adhesion was 3.1mpa and 11.3mpa relative to the pull-off adhesion of comparative examples 1 to 4, and the adhesion advantages of examples 1 to 3 on rust layer were obvious; comparative examples 3 to 4 had poor tolerance to the old paint film and too low crosslinking density, and problems such as undercut and paint drop occurred during the double coating test.
In comparative example 5, only the methyl phenyl silicone oligomer in example 1 was replaced with the methyl silicate oligomer, the methyl silicate oligomer had poor compatibility with the modified toughening resin, had poor permeability to rust layers during permeation, and had incomplete reaction with a curing agent, resulting in an incomplete drying of the paint film, and the paint film was poor in resistance, adhesion, and the like.
In comparative example 6, the hydrogenated epoxy resin of example 1 was merely replaced with bisphenol a epoxy resin, and the permeability to rust layer was reduced as compared with example one, and the pull-apart adhesion was significantly different as compared with example one, because bisphenol a epoxy resin had a larger molecular weight. And because bisphenol A epoxy resin contains aromatic ether bond, the cured product is easy to degrade and break under the irradiation of solar ultraviolet rays, so that a paint film is chalked and shined, the problems of light loss, color change and the like occur only after 600 hours of artificial accelerated aging in comparative example 6, and the obvious difference exists between the results of 3000 hours of color change and light loss < 1 grade in example 1.
From the above data, it is clear that the coating layer of the present example was excellent in shielding against rust in the rust-carrying substrate, and the salt spray effect was better than in comparative example 1 for 2000 hours without abnormality under the same addition amount of the resin and the active rust inhibitive pigment. In the embodiment, because of the existence of main chain silicon-oxygen bonds and higher chemical bond energy, the artificial accelerated aging is better up to 3000h, the color-changing light-losing level is less than 1, and the epoxy coating of comparative example 1 is subjected to artificial acceleration for 48h, so that serious color-changing light-losing pulverization occurs;
from the above data, it is also known that the curing in this example is an organic-inorganic hybridization reaction, and is in a structure of an interpenetrating network, and the wet penetration of the coating film and the complex reaction such as phosphating passivation of the active ions released by the active rust-inhibiting pigment and rust occur, so that the polysiloxane coating characteristic presented by the coating layer is excellent in chemical properties such as acid, alkali and salt resistance. The comparative example has the defects of single crosslinking structure, low crosslinking density and the like, and has the defects of poor wettability and permeability of the coating to the rust layer, poor chemical resistance, poor ageing resistance, high VOC content and the like due to the fact that the coating cannot be effectively combined with the rust layer for conversion.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The low-surface-treatment polysiloxane coating is characterized by mainly comprising a main agent and a curing agent, wherein the weight ratio of the main agent to the curing agent is 20-25:4-6;
the main agent is mainly prepared from the following raw materials in parts by weight: 25-35 parts of organosilicon intermediate, 10-20 parts of acrylic acid monomer, 10-15 parts of epoxy resin, 1.2-2.5 parts of auxiliary agent, 21-32 parts of active rust-proof pigment and 15-21 parts of zinc-aluminum alloy powder;
the curing agent is mainly prepared from the following raw materials in parts by weight: 90-95 parts of aminosilane oligomer and 5-10 parts of catalyst.
2. The low surface treated polysiloxane coating of claim 1, wherein the silicone intermediate comprises a methylphenyl silicone oligomer.
3. The low surface treatment polysiloxane coating of claim 1, wherein the acrylic monomer comprises at least one of 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate and trimethylolpropane trimethacrylate.
4. The low surface treated polysiloxane coating of claim 1, wherein the epoxy resin comprises a hydrogenated epoxy resin.
5. The low surface treated polysiloxane coating of claim 1, wherein the active rust inhibitive pigment comprises at least one of phosphate, molybdate, borate, and zinc oxide.
6. The low surface treatment polysiloxane coating of claim 1, wherein the catalyst is at least one of an organotin and organobismuth based catalyst.
7. The low surface treatment polysiloxane coating according to claim 1, wherein the auxiliary agent comprises a dispersant and a thixotropic agent.
8. The low surface treatment polysiloxane coating according to claim 7, characterized in that,
the thixotropic agent comprises at least one of hydrogenated castor oil, bentonite and gaseous carbon dioxide silicon;
the dispersant includes at least one of an alkyl ammonium salt emulsion of a polycarboxylic acid, a phosphate ester, and a modified polyurethane block copolymer.
9. A method of preparing a low surface treatment polysiloxane coating according to any one of claims 1 to 8, characterized in that the method comprises the steps of:
adding an organosilicon intermediate, an acrylic acid monomer and epoxy resin into a container A in proportion, and uniformly stirring at medium speed to prepare a mixture a;
adding the auxiliary agent into the mixture a in proportion under the low-speed stirring state, stirring uniformly, adjusting to high-speed stirring, adding the active rust-proof pigment and the zinc-aluminum alloy powder under the high-speed stirring state, dispersing until the fineness is less than or equal to 60 mu m, and filtering to obtain a main agent;
adding an aminosilane oligomer and a catalyst into a container B according to a certain proportion, uniformly mixing, and filtering to obtain a curing agent;
and uniformly mixing the main agent and the curing agent according to the weight ratio to obtain the polysiloxane coating with low surface treatment.
10. The method according to claim 9, wherein the low-speed stirring speed is 300 to 600rpm, the medium-speed stirring speed is 700 to 1200rpm, and the high-speed stirring speed is 1300 to 2000rpm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004051943A (en) * | 2002-02-18 | 2004-02-19 | Kansai Paint Co Ltd | Coating composition |
| CN114316647A (en) * | 2020-09-30 | 2022-04-12 | 庞贝捷涂料（昆山）有限公司 | Polysiloxane-based coating composition |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004051943A (en) * | 2002-02-18 | 2004-02-19 | Kansai Paint Co Ltd | Coating composition |
| CN114316647A (en) * | 2020-09-30 | 2022-04-12 | 庞贝捷涂料（昆山）有限公司 | Polysiloxane-based coating composition |
Non-Patent Citations (1)
| Title |
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| 张洪斌: ""新型重防腐蚀涂料-锌铝合金鳞片涂料"", 《氯碱工业》, no. 6, pages 26 - 29 * |
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