CN114921179A - Environment-friendly high-temperature-resistant coating, preparation method and application thereof - Google Patents
Environment-friendly high-temperature-resistant coating, preparation method and application thereof Download PDFInfo
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- CN114921179A CN114921179A CN202210688628.XA CN202210688628A CN114921179A CN 114921179 A CN114921179 A CN 114921179A CN 202210688628 A CN202210688628 A CN 202210688628A CN 114921179 A CN114921179 A CN 114921179A
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- siloxane polymer
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- 238000000576 coating method Methods 0.000 title claims abstract description 91
- 239000011248 coating agent Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229920000642 polymer Polymers 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 39
- -1 anhydride compounds Chemical class 0.000 claims abstract description 37
- 239000011521 glass Substances 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000001023 inorganic pigment Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims description 14
- 150000008065 acid anhydrides Chemical class 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 239000010445 mica Substances 0.000 claims description 8
- 229910052618 mica group Inorganic materials 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 150000008064 anhydrides Chemical class 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 125000005647 linker group Chemical group 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 4
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- QDLZHJXUBZCCAD-UHFFFAOYSA-N [Cr].[Mn] Chemical compound [Cr].[Mn] QDLZHJXUBZCCAD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 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 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 235000011470 Adenanthera pavonina Nutrition 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical group [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 241000428378 Lopa Species 0.000 claims description 2
- SSWJHSASZZAIAU-BYPYZUCNSA-N [(3s)-2,5-dioxooxolan-3-yl] acetate Chemical compound CC(=O)O[C@H]1CC(=O)OC1=O SSWJHSASZZAIAU-BYPYZUCNSA-N 0.000 claims description 2
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052739 hydrogen Chemical group 0.000 claims description 2
- 239000001257 hydrogen Chemical group 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims 1
- 239000011253 protective coating Substances 0.000 claims 1
- 229920002379 silicone rubber Polymers 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- 230000004224 protection Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000003960 organic solvent Substances 0.000 abstract description 3
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 2
- 239000004917 carbon fiber Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 32
- 150000003839 salts Chemical class 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- 239000007921 spray Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 125000005462 imide group Chemical group 0.000 description 10
- 230000005855 radiation Effects 0.000 description 10
- 229920005573 silicon-containing polymer Polymers 0.000 description 8
- 238000005336 cracking Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 230000005587 bubbling Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000002845 discoloration Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000012855 volatile organic compound Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 2
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical group [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- FWHUTKPMCKSUCV-UHFFFAOYSA-N 1,3-dioxo-3a,4,5,6,7,7a-hexahydro-2-benzofuran-5-carboxylic acid Chemical compound C1C(C(=O)O)CCC2C(=O)OC(=O)C12 FWHUTKPMCKSUCV-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229920013822 aminosilicone Polymers 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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 application relates to the technical field of coatings, and particularly discloses an environment-friendly high-temperature-resistant coating, a preparation method and application thereof; the environment-friendly high-temperature-resistant coating comprises the following raw materials in percentage by mass: 25-75% of siloxane polymer; 3-35% of glass powder; 3-25% of inorganic pigment; 1-15% of a catalyst; wherein the siloxane polymer is prepared by reacting anhydride compounds and aminosiloxane in water bath, and then heating, dehydrating and polymerizing; the environment-friendly high-temperature-resistant coating does not contain an organic solvent, has the advantages of environmental protection, less pollution and the like, and can be applied to chimney, exhaust pipe, high-temperature reaction equipment, carbon fiber composite material surface temperature-resistant protection and torch surface temperature-resistant protection coatings in steel plants.
Description
Application No. 2022104422806 entitled "Silicone Polymer and Process for its preparation", an invention application having filing date 2022, 04/25.
Technical Field
The application relates to the technical field of coatings, in particular to an environment-friendly high-temperature-resistant coating, a preparation method and application thereof.
Background
With the rapid development of modern industry, more and more equipment needs to be used under high temperature conditions, and the protection of the equipment under high temperature conditions is very important. Compared with the thermal protection by using high-temperature alloy such as aluminum, titanium and the like, the cost of protection by using the high-temperature resistant coating is lower, and the construction is more convenient. The high-temperature resistant coating can bear the temperature of more than 200 ℃, so that the protected equipment can be normally used under the high-temperature condition.
The existing temperature-resistant coatings mainly comprise epoxy phenolic coatings and epoxy organosilicon coatings, the temperature resistance of the coatings is about 200 ℃, the coatings are easy to crack and even fall off when used for a long time at the temperature of more than 200 ℃, and on the other hand, the coatings have poor environmental weather resistance and are easy to crack or fall off when exposed to sunlight for a long time. And thus cannot satisfy scenes and outdoor use that need to withstand ultra-high temperatures. Such as a chimney and high-temperature reaction equipment of a steel plant, a torch exhaust pipe and the like.
In addition, such coatings generally require the use of organic solvents to increase their ductility, and therefore have high VOC (volatile organic compounds) content, which causes pollution to the external environment when the coatings are used in large areas.
Disclosure of Invention
In order to improve the weather resistance of the temperature-resistant coating at ultrahigh temperature and reduce the environmental pollution, the application provides an environment-friendly high-temperature-resistant coating, a preparation method and application thereof.
In a first aspect, the application provides an environment-friendly high temperature resistant coating, which adopts the following technical scheme:
the environment-friendly high-temperature-resistant coating comprises the following raw materials in percentage by mass: 25-75% of siloxane polymer; 3-35% of glass powder; 3-25% of inorganic pigment; 1-15% of a catalyst;
the siloxane polymer has the general formula:
wherein R1 is alkyl or alkoxy; r2 is a divalent linking group; r3 is a divalent linking group; r4 is an amino-containing group; r5 is alkyl, alkoxy or hydrogen; m is 10-1000; n is 0 to 700.
By adopting the technical scheme, the coating is introduced with the siloxane polymer with a siloxane bond main chain and an imide side chain, wherein the Si-O structure in the polysiloxane main chain is decomposed into silicon dioxide under a certain high-temperature condition, and the silicon dioxide is an inorganic oxide, so that the coating has the characteristics of high safety, no toxicity, no corrosiveness, high melting point, strong aging resistance and the like; the imide side chain has continuous high-temperature weather resistance, chemical solvent resistance and radiation resistance, so that the coating has the effects of high temperature resistance, ultraviolet ray resistance and weather resistance;
because the glass powder is used as the filling material, on one hand, the melting point of the glass powder is low, the glass powder melted by heating can be easily filled into a network structure in a silicon-oxygen chain, and on the other hand, the chemical property of the glass powder is stable, the glass powder has excellent acid resistance, and the rigidity and the weather resistance of the coating can be further improved;
the inorganic pigment is an environment-friendly pigment, and the color optimization of the coating and the low VOC component of the coating are both considered;
the catalyst is mainly used for polymerization reaction of siloxane bonds in the coating, so that the surface drying speed and the crosslinking density of the coating are improved, and the corrosion resistance and the protection capability of the coating are improved.
In addition, the coating prepared by the formula does not contain a solvent, VOC can be controlled below 120g/l, and VOC emission is reduced, so that the environmental protection performance index of the coating is improved.
Optionally, the coating comprises the following raw materials in percentage by mass: 30-70% of siloxane polymer; 5-40% of glass powder; 5-20% of an inorganic pigment; 1-10% of a catalyst.
By adopting the technical scheme, the adhesive force, heat resistance, salt mist resistance and ultraviolet irradiation resistance of the coating obtained by adopting the formula are remarkably improved compared with those of the existing temperature-resistant coating.
Optionally, the raw materials of the coating also comprise 1-10% by mass of a filler.
Optionally, the filler is one or a mixture of mica powder, pearl powder, talcum powder, silicon micropowder and activated clay.
By adopting the technical scheme, the filler with good dispersion performance can be used for effectively filling gaps formed by siloxane polymers, the permeability resistance of the coating can be improved, the water and other corrosive substances can be blocked, the cracking of the inorganic coating caused by the change of temperature can be reduced, and the raw material cost of the coating can be reduced.
Optionally, the glass powder has a particle size of 1-13 um and is formed by mixing glass powders with melting points within a range of 400-600 ℃; the inorganic pigment is one or more of copper chromium black, iron oxide black, manganese chromium black, titanium dioxide, lithopone and Lopa's; the catalyst is one of titanate n-butyl ester and poly-butyl titanate; the filler is one of mica powder, alumina fiber and silica micropowder.
By adopting the technical scheme, the glass powder with the particle size of 1-13 mu m is adopted, the particle size is small, the heating and melting efficiency is high, and the glass powder can be fully filled into a network structure in an organic silicon-oxygen chain, so that the cracking resistance of the coating at high temperature is improved, and the weather resistance of the coating is prolonged; the inorganic materials such as copper chromium black and the like have the characteristics of an environment-friendly pigment on one hand, and have the advantages of good heat resistance and no discoloration in a long-term high-temperature environment on the other hand; by adopting the titanate catalyst, the condensation of hydroxyl is promoted, so that the polymerization of the coating and the combination of the coating and the base material are accelerated, the maintenance period is shortened, the construction time is shortened, and the construction efficiency is improved.
Optionally, the siloxane polymer is prepared by reacting an anhydride compound with aminosiloxane and then dehydrating and polymerizing; the acid anhydride compound is intramolecular acid anhydride.
By adopting the technical scheme, intramolecular anhydride can be dehydrated to form an imide group through reaction with aminosiloxane, the imide group has excellent heat resistance, and the high temperature resistance and weather resistance of a silicon-oxygen bond main chain are further improved.
Optionally, the aminosilane is one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane and N- (beta-aminoethyl-gamma-aminopropyl) trimethoxysilane; the acid anhydride compound is one of trimellitic anhydride, 1,2, 4-cyclohexane tricarboxylic anhydride and (-) -O-acetyl-L-malic anhydride.
In a second aspect, the application also discloses a preparation method of the environment-friendly high-temperature-resistant coating, which comprises the following steps:
weighing siloxane polymer, glass powder, inorganic pigment and filler according to the proportion, adding the siloxane polymer, the glass powder, the inorganic pigment and the filler into a stirring tank, mixing and dispersing at a rotating speed of 300-600 rpm at a medium speed to prepare a mixture A;
and (3) catalytically weighing the catalyst in the proportion, adding the catalyst into the mixture A, and dispersing at the rotating speed of 300-600 rpm to prepare the environment-friendly high-temperature-resistant coating.
By adopting the technical scheme, the preparation process of the coating is simple and controllable, and is beneficial to large-scale mass production.
In a third aspect, the application also discloses the use of a coating.
The coating is applied to chimneys, exhaust pipes, high-temperature reaction equipment, carbon fiber composite material surface temperature-resistant protection coatings and torch surface temperature-resistant protection coatings of steel plants.
By adopting the technical scheme, the coating obtained by the application can be applied to chimneys, exhaust pipes, high-temperature reaction equipment and torch coatings of iron and steel plants, the service life of the base material can be prolonged, and the powder coating is convenient to construct, does not contain organic solvents, and reduces the influence of the construction process on personnel.
In summary, the present application has the following beneficial effects:
1. because the coating adopts the siloxane polymer with the siloxane main chain and the imide side chain, the siloxane main chain has the excellent characteristics of high safety, no toxicity, no corrosiveness, high melting point, strong aging resistance and the like, and the imide side chain has continuous high-temperature weather resistance, chemical solvent resistance and radiation resistance, thereby obtaining the effects of ultrahigh-temperature weather resistance and ultraviolet irradiation resistance.
2. The mica powder and the low-melting-point glass powder are preferably compounded as the filler, so that the hardness of the coating is improved, the mica powder and the glass powder are favorable for blocking oxygen and water vapor from entering, the heat resistance of the coating is improved, and the effect of ultrahigh-temperature weather resistance is obtained.
3. According to the preparation method of the siloxane polymer, the molar ratio of the anhydride compound to the aminosiloxane is adjusted, so that the siloxane polymer obtains an excellent adhesion effect.
Detailed Description
The present application will be described in further detail by way of examples. The special description is as follows: the following examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer, and the starting materials used in the following examples were obtained from ordinary commercial sources unless otherwise specified.
Preparation of Silicone Polymer
Preparation example 1
Weighing the acid anhydride compound and the aminosiloxane according to the molar ratio of 0.3:1.0, adding the mixture into a reactor kettle, carrying out ice bath at the temperature of 0 ℃, and stirring for 8 hours; obtaining siloxane imide acid monomer;
and (3) raising the temperature of the reaction kettle to 70 ℃, stirring the obtained imido acid siloxane monomer for 8 hours, and dehydrating and polymerizing to obtain a siloxane polymer, wherein the siloxane polymer is imidized polysiloxane.
The specific types of the acid anhydride compound and the aminosiloxane are shown in Table 1.
Preparation examples 2 to 11
The differences between the preparation examples 2-11 and the preparation example 1 are in the amount, type and reaction conditions of the acid anhydride compound and the aminosiloxane, which is specifically shown in table 1.
TABLE 1 preparation of Silicone Polymer raw Material types, amounts incorporated and reaction conditions
Wherein, A in the table 1 is 3-aminopropyltrimethoxysilane, B is 3-aminopropyltriethoxysilane, and C is N- (beta-aminoethyl-gamma-aminopropyl) trimethoxysilane.
Examples
A preparation method of an environment-friendly high-temperature-resistant coating comprises the following steps:
s1, weighing siloxane polymer, glass powder, inorganic pigment and filler according to the proportion in the table 2, adding the siloxane polymer, the glass powder, the inorganic pigment and the filler into a stirring tank, mixing, and dispersing at a middle speed of 450rpm for 60min to obtain a mixture A;
s2, adding the catalysts in the corresponding proportions in the table 2 into the mixture A, and dispersing at the rotating speed of 450rpm for 60min to prepare the environment-friendly high-temperature-resistant coating.
TABLE 2 preparation of the raw material components and blending amounts (in mass percent) of the environment-friendly high temperature resistant coatings of examples 1 to 16
The inorganic pigment used in embodiments 1 to 16 is copper-chromium black, and in other embodiments, the inorganic pigment may be one or a combination of manganese-chromium black, titanium dioxide, lithopone, laoney sulfur and iron oxide black.
The catalyst used in embodiments 1-16 is titanate n-butyl titanate, and in other embodiments, polybutyl titanate may also be used as a substitute;
in the embodiments 12 to 16, the filler is mica powder, and in other embodiments, one or more of pearl powder, talcum powder, silica powder and activated clay can be used as a substitute.
Comparative example
Comparative example 1
A preparation method of a long-time high-temperature-resistant heat-insulating organic silicon coating comprises the following steps: weighing 100 parts of epoxy machine silicone resin, 40 parts of nano silicon dioxide, 5 parts of anti-aging agent A, 3 parts of pigment and 20 parts of magnesium sulfate, adding a proper amount of xylene into a stirring tank, carrying out high-speed grinding at a grinding speed of 2500-3000 r/min and a discharge fineness of 40 microns, then adding a heat insulation filler, adding a proper amount of xylene to adjust viscosity, and uniformly stirring at a high speed to obtain the high-temperature resistant coating.
Comparative example 2
Comparative example 2 differs from example 16 in that the silicone polymer of preparation example 3 was incorporated at a mass fraction of 10%; the mass fractions of other components are respectively as follows: 45% of glass powder; 25% of copper chromium black; 15% of a catalyst; 5% of mica powder.
Comparative example 3
Comparative example 3 differs from example 16 in that the silicone polymer of preparation example 3 is incorporated at a mass fraction of 80%; the mass fractions of other components are respectively as follows: 5% of glass powder; 5% of copper chromium black; 5% of a catalyst; 5% of mica powder.
Comparative example 4
Comparative example 4 differs from example 16 in that the molar ratio of the acid anhydride-based compound to the aminosilicone of preparation example 3 was 0.25, comparative example 5
Comparative example 5 differs from example 16 in that the molar ratio of the acid anhydride-based compound to the aminosiloxane of preparation example 3 is 1.25.
Comparative example 6
Comparative example 6 differs from example 16 in that the reaction conditions of the aminosiloxane and the acid anhydride-based compound in preparation example 3 were a 15 ℃ cold water bath and stirring for 8 hours.
Performance test
After sand blasting treatment is carried out on a steel plate (150mm multiplied by 70mm multiplied by 1mm) serving as a base material, the coatings prepared in the examples 1 to 16 and the comparative examples 1 to 6 are sprayed on the surface of the steel plate, and the thickness of the coating is 350 to 400 microns. And after curing for a certain time, carrying out adhesion, high temperature resistance, salt spray resistance and QUV artificial aging test.
And (3) carrying out an adhesion test after the test board is maintained for 168 h: the test was performed with reference to GB/T9286-1998; the grade is 0-5, and the 0 grade adhesion is the best.
And (3) maintaining the test board for 168h, and then performing a high-temperature resistance test: GB/T1740-2007;
and (3) putting the cured test piece into a muffle furnace, programming to 600 ℃ for measuring temperature, keeping the temperature constant for 2 hours, naturally cooling to room temperature, taking out, observing the surface condition of the coating by using a 10-time magnifying lens, circulating for 5 times, and recording the result in a table 3.
And curing the test board for 168h, and then performing a salt spray resistance test: the test was performed with reference to JG/T224-,
spraying 5% sodium chloride aqueous solution in a test box at 35 ℃ to simulate an accelerated corrosion test of a seawater environment, wherein the test is divided into 3 grades, namely, the grade I-100 h bubbling and shedding are respectively carried out; stage II-500 h bubbling and shedding; grade III-1000 h bubbling and shedding.
And performing QUV artificial aging test after curing for 168 h: the test was performed with reference to JG/T224-2007; the paint is divided into 3 grades, i grade I-1000 h bubbling, peeling, powdering and discoloring; foaming, peeling, cracking, powdering and discoloring for II-2500 h; grade III-5000 h bubbling, peeling, cracking, powdering, discoloring.
TABLE 3 test results of examples 1 to 16 and comparative examples 1 to 6
Analysis of results
By combining the examples 1 to 16 and the comparative example 1 and combining the table 3, it can be seen that the high temperature weather resistance of the environment-friendly coating prepared in the examples 1 to 16 is improved, the appearance is peeled off after 5 times of circulation at 600 ℃, the percentage of cracking is low, and the gloss is not obviously changed; this is because the siloxane bond is stable against temperature at 600 ℃ while the epoxy group in the comparative example is degraded at high temperature to cause cracking of the coating film and powdering and loss of gloss. The coatings obtained in the embodiments 1 to 16 can be subjected to salt spray corrosion for 500 to 1000 hours at 35 ℃, and most embodiments have no foaming, cracking and discoloration phenomena, probably because imide bonds and a small amount of carboxyl groups on silicon-oxygen bonds can form excellent adhesion with a base material, and the compactness of a coating film can be remarkably improved. The ultraviolet radiation resistance is remarkably improved, and most of the ultraviolet radiation resistance is in class III, because: the silicon-oxygen bond and the imide bond in the embodiment have excellent ultraviolet resistance, and especially the silicon-oxygen bond energy which occupies one of the main components is far larger than the ultraviolet bond energy, so that the long-term ultraviolet irradiation has no obvious aging and degradation effect on the coating film.
The differences in the sources of the siloxane polymers are shown in the combination of examples 1-5. The coating prepared from example 3 with the siloxane polymer of preparation 3 has the best adhesion, high temperature resistance, salt spray resistance and ultraviolet radiation resistance, and in particular has a difference from 1,2,4 and 5 in terms of discoloration resistance at high temperature, because: the molar ratio of trimellitic anhydride to amino siloxane is 0.65:1, the content of imidized siloxane is 65%, the siloxane polymer has the best appearance stability under high temperature resistance, and imide groups have excellent temperature resistance, ultraviolet resistance, salt spray corrosion resistance and substrate adhesion capacity and can form an organic-inorganic hybrid system with excellent performance with a silicon-oxygen bond.
Comparing examples 3 and 6 to 7, examples 6 to 7 added the siloxane polymers obtained in preparation examples 6 to 7, except that the temperatures of the imide acid siloxane polymerization reaction were different. The adhesion, high temperature resistance, salt spray resistance and ultraviolet irradiation resistance of examples 6 to 7 are not significantly different from those of example 3, because the polyimide bond produced in the previous stage has stable performance and is very stable at the temperature, hydrolysis and decomposition do not occur, and in addition, the reaction temperature is increased to 85 ℃ and 100 ℃, which is beneficial to the acceleration of the reaction and shortens the reaction time, but the adhesion, high temperature resistance, salt spray resistance and ultraviolet irradiation resistance are the same as those of the reactant produced at 70 ℃.
Comparative examples 3 and 8 to 9, examples 8 to 9 were added to the siloxane polymers prepared in preparation examples 8 to 9, except that the siloxane polymer was replaced with a different aminosiloxane monomer. The adhesion, high temperature resistance, salt spray resistance and ultraviolet irradiation resistance of examples 8-9 are not significantly different from those of example 3, because aminosilanes with different structures react with trimellitic anhydride to produce polyimide acid, and the polyimide acid further reacts to generate the polyamide siloxane polymer.
In comparison with examples 3 and 10 to 11, examples 10 to 11 were added to the siloxane polymers obtained in preparation examples 10 to 11, except that the siloxane polymers were replaced with different acid anhydride monomers. Compared with the adhesive force, high temperature resistance, salt mist resistance and ultraviolet irradiation resistance of the embodiment 10-11, the temperature resistance and ultraviolet irradiation resistance of the material are obviously reduced; this is because anhydride side chains of this type carry longer organic groups and ultimately produce polyimidesiloxane polymers with longer organic branches, which are susceptible to color change and degradation upon aging upon exposure to high temperatures and ultraviolet light.
Comparative example 3 and examples 12 to 16, examples 12 to 16 are different in the ratio of each component and contain a filler. The reason why the coatings in examples 12-13 have poor adhesion and salt spray performance is that the adhesion of the coating to the base material is poor due to the fact that the content of siloxane polymers in the formula is small, and the salt spray corrosion resistance is poor due to the fact that the compactness of the coating is poor; examples 14-15 added excess siloxane polymer resulted in discoloration and loss of gloss of the coating film at high temperature, due primarily to slight decomposition of imide bonds in the side chains of the high level siloxane polymer upon prolonged exposure to 600 ℃. Example 16 has no significant change, indicating that the adjustment of reasonable filler proportions does not affect the main properties of the coating film.
Comparative example 16 is different from comparative examples 2 to 3 in that the ratio of the amount of the silicone polymer incorporated is different in comparative examples 2 to 3. Wherein comparative example 2 incorporates 10% by weight of a silicone polymer; the corresponding adhesive force, high temperature resistance and salt resistance are obviously reduced because the stable binding force with the base material and the compactness of the coating film cannot be formed due to the fact that the siloxane polymer is contained in the formula in too small amount.
Comparative example 3, in which a siloxane polymer was added in an amount of 80% by mass, corresponds to a slight decrease in resistance to high temperature and ultraviolet radiation, because imide groups in the siloxane polymer, although excellent in resistance to high temperature and ultraviolet radiation, are decomposed and aged by exposure of a large number of imide groups to high temperature of 600 c and strong ultraviolet radiation for a long period of time; therefore, it is necessary to design the high-temperature resistant coating by mixing the imide group-containing siloxane polymer and the functional inorganic filler according to a reasonable proportion.
Comparative example 16 and comparative examples 4 to 5 are different from those of comparative examples 4 to 5 in that the molar ratio of the acid anhydride-based compound to the aminosiloxane is different. Wherein the molar ratio of the acid anhydride compound to the aminosiloxane in comparative example 4 is 0.25, the corresponding high temperature resistance, salt fog resistance, and ultraviolet irradiation resistance are significantly reduced because the amino group in the aminosiloxane, which has not been completely reacted, is easily discolored and decomposed by long-term exposure to high temperature and ultraviolet irradiation, thereby affecting the appearance of the coating film.
The molar ratio of the acid anhydride compound to the aminosiloxane of comparative example 5 was 1.25, which corresponds to a significant reduction in the high temperature and uv and salt spray resistance, since at this ratio the aminosilane and anhydride did not react completely, and the excess anhydride groups reacted with later readily absorbing water in the air to produce carboxylic acids and condensation polymers which were susceptible to discoloration and degradation upon prolonged exposure to high temperature and uv light.
Comparative example 16 and comparative example 6 are different in the preparation of the silicone polymer in comparative example 6 in the reaction conditions of the acid anhydride-based compound and the aminosiloxane. Wherein the ice-bath condition of the acid anhydride compound and the aminosiloxane in the comparative example 5 is 15 ℃; the high temperature resistance and ultraviolet radiation resistance of the material are obviously reduced because the water generated by the reaction of the acid anhydride and the amino group is easy to react with the acid anhydride to generate a large amount of carboxyl under the reaction condition of more than 10 ℃, so that the formation of imine bonds is influenced, the higher the reaction temperature is, the more favorable the reaction of the water and the acid anhydride is to generate the carboxyl, and the generation of a large amount of carboxylic acid groups seriously influences the temperature resistance, ultraviolet radiation resistance and salt spray resistance of reactants.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. An environment-friendly high-temperature-resistant coating is characterized in that: the material comprises the following raw materials in percentage by mass: 25-75% of siloxane polymer; 3-35% of glass powder; 3-25% of inorganic pigment; 1-15% of a catalyst;
the siloxane polymer has the general formula:
wherein R1 is alkyl or alkoxy; r2 is a divalent linking group; r3 is a divalent linking group; r4 is an amino-containing group; r5 is alkyl, alkoxy or hydrogen; m is 10 to 1000; n is 0 to 700.
2. The coating of claim 1, characterized in that: the silicone rubber is prepared from the following raw materials in percentage by mass, and 30-70% of a siloxane polymer; 5-40% of glass powder; 5-20% of an inorganic pigment; 1-10% of a catalyst.
3. The paint according to claim 1 or 2, characterized in that: the raw materials also comprise 1-10% of fillers by mass.
4. The coating of claim 3, characterized in that: the filler is one or a mixture of mica powder, pearl powder, talcum powder, silicon micropowder and activated clay.
5. The coating of claim 1, characterized in that: the glass powder has the particle size of 1-13 um and is formed by mixing glass powder with the melting points within the range of 400-600 ℃;
the inorganic pigment is one or more of copper chromium black, iron oxide black, manganese chromium black, titanium dioxide, lithopone and Lopa sulfonic acid; the catalyst is one of titanate n-butyl titanate and poly-butyl titanate.
6. The coating of claim 1, characterized in that: the siloxane polymer is prepared by reacting an anhydride compound with aminosiloxane and then dehydrating and polymerizing; the acid anhydride compound is intramolecular acid anhydride.
7. The coating of claim 6, wherein: the aminosilane is one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane and N- (beta-aminoethyl-gamma-aminopropyl) trimethoxysilane; the acid anhydride compound is one of trimellitic anhydride, 1,2, 4-cyclohexane tricarbamic anhydride and (-) -O-acetyl-L-malic anhydride.
8. The coating of claim 6, wherein: the molar ratio of the acid anhydride compound to the aminosiloxane is 0.3-1.0: 1.0.
9. The preparation method of the environment-friendly high-temperature-resistant coating as claimed in claim 1, comprising the following steps:
weighing siloxane polymer, glass powder, inorganic pigment and filler according to the proportion, adding the siloxane polymer, the glass powder, the inorganic pigment and the filler into a stirring tank, mixing and dispersing at a rotating speed of 300-600 rpm at a medium speed to prepare a mixture A;
and (3) catalytically weighing the catalyst in the proportion, adding the catalyst into the mixture A, and dispersing at the rotating speed of 300-600 rpm to prepare the environment-friendly high-temperature-resistant coating.
10. The use of the coating according to any one of claims 1-2 and 4-8 or the coating prepared by the method according to claim 9 as a temperature-resistant protective coating for the surfaces of chimneys, exhaust pipes, high-temperature reaction equipment, carbon fiber composites and torches in steel and iron works.
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| CN202210690058.8A Pending CN114806406A (en) | 2022-04-25 | 2022-06-17 | Environment-friendly siloxane anti-corrosion temperature-resistant coating |
| CN202210690057.3A Pending CN114907773A (en) | 2022-04-25 | 2022-06-17 | Environment-friendly marine antifouling paint and preparation method thereof |
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| CN114907773A (en) | 2022-08-16 |
| CN114958199A (en) | 2022-08-30 |
| CN114806406A (en) | 2022-07-29 |
| CN114836129B (en) | 2022-12-27 |
| CN114957668A (en) | 2022-08-30 |
| CN114836129A (en) | 2022-08-02 |
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Application publication date: 20220819 |