CN116120811A - Water-based acrylic resin composite modified aerogel heat-insulating fireproof coating and preparation method thereof - Google Patents
Water-based acrylic resin composite modified aerogel heat-insulating fireproof coating and preparation method thereof Download PDFInfo
- Publication number
- CN116120811A CN116120811A CN202310242502.4A CN202310242502A CN116120811A CN 116120811 A CN116120811 A CN 116120811A CN 202310242502 A CN202310242502 A CN 202310242502A CN 116120811 A CN116120811 A CN 116120811A
- Authority
- CN
- China
- Prior art keywords
- aerogel
- water
- fireproof
- composite modified
- acrylic resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004964 aerogel Substances 0.000 title claims abstract description 138
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 72
- 239000011248 coating agent Substances 0.000 title claims abstract description 56
- 238000000576 coating method Methods 0.000 title claims abstract description 56
- 239000004925 Acrylic resin Substances 0.000 title claims abstract description 53
- 229920000178 Acrylic resin Polymers 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003063 flame retardant Substances 0.000 claims abstract description 45
- 239000003973 paint Substances 0.000 claims abstract description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 40
- 239000010703 silicon Substances 0.000 claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 239000003822 epoxy resin Substances 0.000 claims abstract description 27
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 230000002195 synergetic effect Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000003094 microcapsule Substances 0.000 claims abstract description 12
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000009835 boiling Methods 0.000 claims abstract description 10
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 10
- 239000011737 fluorine Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- -1 alkoxy silane Chemical compound 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- 229910000077 silane Inorganic materials 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 60
- 239000002904 solvent Substances 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 12
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 8
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 8
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 8
- 238000004821 distillation Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 229920000877 Melamine resin Polymers 0.000 claims description 7
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 7
- 229920002050 silicone resin Polymers 0.000 claims description 7
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 239000000413 hydrolysate Substances 0.000 claims description 6
- HPEUJPJOZXNMSJ-UHFFFAOYSA-N Methyl stearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC HPEUJPJOZXNMSJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 4
- IBDVWXAVKPRHCU-UHFFFAOYSA-N 2-(2-methylprop-2-enoyloxy)ethyl 3-oxobutanoate Chemical compound CC(=O)CC(=O)OCCOC(=O)C(C)=C IBDVWXAVKPRHCU-UHFFFAOYSA-N 0.000 claims description 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- 239000011162 core material Substances 0.000 claims description 3
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 claims description 3
- 229960004624 perflexane Drugs 0.000 claims description 3
- ZJIJAJXFLBMLCK-UHFFFAOYSA-N perfluorohexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ZJIJAJXFLBMLCK-UHFFFAOYSA-N 0.000 claims description 3
- YVBBRRALBYAZBM-UHFFFAOYSA-N perfluorooctane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F YVBBRRALBYAZBM-UHFFFAOYSA-N 0.000 claims description 3
- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 claims description 2
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- GWFGDXZQZYMSMJ-UHFFFAOYSA-N Octadecansaeure-heptadecylester Natural products CCCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCCCC GWFGDXZQZYMSMJ-UHFFFAOYSA-N 0.000 claims description 2
- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 claims description 2
- 125000002511 behenyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 claims description 2
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 claims description 2
- CAMHHLOGFDZBBG-UHFFFAOYSA-N epoxidized methyl oleate Natural products CCCCCCCCC1OC1CCCCCCCC(=O)OC CAMHHLOGFDZBBG-UHFFFAOYSA-N 0.000 claims description 2
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 2
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 2
- 230000003301 hydrolyzing effect Effects 0.000 claims description 2
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 2
- NKBWPOSQERPBFI-UHFFFAOYSA-N octadecyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCCCC NKBWPOSQERPBFI-UHFFFAOYSA-N 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 claims description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 2
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 239000004566 building material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000002209 hydrophobic effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011490 mineral wool Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical class CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 1
- 206010000369 Accident Diseases 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004965 Silica aerogel Substances 0.000 description 1
- JLFZXEWJEUGNQC-UHFFFAOYSA-N [methyl-(silylamino)silyl]methane Chemical compound C[SiH](C)N[SiH3] JLFZXEWJEUGNQC-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- 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
- C09D5/002—Priming paints
-
- 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
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
Abstract
The invention provides a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating and a preparation method thereof, wherein the structure of the water-based acrylic resin composite modified aerogel heat-insulating fireproof coating comprises the following components: waterborne epoxy resin tackifying primer and composite modified aerogel fireproof finish paint. The water-based epoxy resin tackifying primer comprises water-based acrylic resin and temperature-controlled microcapsule powder, and is prepared by stirring, mixing and dispersing; the composite modified aerogel fireproof finish paint comprises organic silicon resin sealing modified fireproof aerogel and high-viscosity water-based acrylate resin. The organic silicon closed modified fireproof aerogel is prepared by introducing alkoxy silane coupling, low-viscosity organic silicon resin, P-C-N source synergistic flame retardant and low-boiling point fluorine-containing flame retardant in the synthesis process of the aerogel. The finally prepared coating has good adhesive force, water resistance and excellent flame retardance and fire resistance.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating and a preparation method thereof.
Background
The current fire accident is frequent, and serious harm is caused to lives and properties of people. How to improve the heat insulation and fire prevention safety performance of building materials becomes urgent. The use of fire-proof paint is an effective solution, and the fire-proof paint is coated on building materials, can prevent the spread of fire, or isolate the fire source to prolong the firing time of the base material, or increase the heat-insulating property to delay the structural damage time of the building materials, and has great application prospect.
The resin-based heat-insulating fireproof paint is generally prepared from high-temperature-resistant resin serving as a main material by adding fillers for reducing density, reducing heat conductivity and improving high temperature resistance. The silicon resin has excellent thermal oxidation stability, the water resistance and the heat resistance are far better than those of common organic resin, and the silicon resin is one of important resin matrixes for preparing ablation-resistant heat insulation coating, but the mechanical strength and the bonding property of the coating prepared from the silicon resin are poor, so that the application of the silicon resin is seriously influenced. SiO (SiO) 2 Because of the microscopic hole structure of the aerogel, the aerogel has excellent fireproof heat insulation performance, has good prospect when being used as a filler in fireproof heat insulation coating, but has large brittleness and is easy to break and crack, and the aerogel is soaked in some organic solvents to cause collapse of the aerogel holes, so that the heat insulation performance of the aerogel is seriously reduced, and the aerogel is difficult to directly apply in resin coating.
The water-based acrylic resin paint is a paint which is developed rapidly and has wide application at present, meets the environmental protection requirement, and can be modified according to the use condition to prepare the multi-performance water-based paint. The acrylic resin is prepared by polymerization reaction of acrylic monomers, and has the advantages of excellent stability of a resin matrix, excellent solvent resistance, good film forming property of a paint film, excellent mechanical property, high corrosion resistance and weather resistance and the like; the preparation process is easy to control, the materials are sufficient and low, water is used as dilution and cleaning agent, the environment-friendly and safe flame-retardant coating is safe, and the construction performance is good, so the coating is favored by the coating industry. Although the water-based acrylic resin has a plurality of excellent performances, the water-based acrylic resin also has a plurality of defects as a heat-insulating fireproof coating, for example, the acrylic resin has weaker high-temperature resistance and can burn, and in addition, the water-based acrylic resin coating has a certain hydrophilic group, so that the water resistance is easy to be poor in practical application.
For example, CN 114804729 reports a steel structure fireproof protection board containing silica aerogel, which is prepared from the following raw materials in mass ratio: 20-40% of water glass, 50-60% of expanded vermiculite, 5-15% of kaolin, 5-10% of perlite, 5-10% of aluminum hydroxide, 4-10% of reinforcing fiber and 1-2% of sodium fluosilicate early strength agent, wherein in the method, modified micron-sized silicon dioxide heat insulation filler, organosilicon modified acrylic ester and organosilicon modified water glass are adopted for chemical crosslinking copolymerization, so that the water resistance and heat insulation property are remarkably improved. However, the method can not be used as a coating because the fireproof plate can not be used as a coating after being heated and dried by a microwave kiln, and the application range is severely limited.
In addition, 8 to 11.2 percent of ammonium polyphosphate (phosphorus source), 5 to 7 percent of melamine (nitrogen source) and 10 to 14 percent of pentaerythritol (carbon source) are added into the acrylic ester emulsion to form the P-C-N synergistic intumescent flame retardant system in CN 115537099. In addition, the water-soluble polyvinyl alcohol fiber is used as a binder, so that microcracks inside and outside the foaming tissue of the fireproof coating can be effectively reduced. The steel slag micropowder is used as a film forming base material, so that the later strength of the paint can be improved, and the defect that the cement-based paint is easy to crack can be overcome. Wollastonite powder can improve physical and chemical properties of the paint and enhance the expansion capacity and corrosion resistance of the paint. The quartz powder can improve the weather resistance of the fireproof paint. The polyacrylate emulsion and epoxy resin emulsion mixture as film forming emulsion can improve the flexibility and impact resistance of the coating film. However, the direct addition of the P-C-N to the aqueous acrylic resin has a certain influence on the stability and strength of the acrylic resin by using the ammonium polyphosphate as an acid source, and in addition, the solvent and the acrylic polymer in the emulsion are easy to infiltrate the aerogel, so that the pore structure of the aerogel is collapsed or blocked, and the heat insulation performance of the aerogel is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating and a preparation method thereof, and the specific technical scheme is as follows:
the first aspect of the invention provides a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating, which comprises a water-based epoxy resin tackifying primer and a composite modified aerogel fireproof finish;
the composite modified aerogel fireproof finish paint comprises organic silicon resin sealing modified fireproof aerogel and high-viscosity water-based acrylate resin.
Specifically, the dry film thickness of the aqueous epoxy resin tackifying primer is 10-100 mu m; the dry film thickness of the composite modified aerogel fireproof finish paint is 100 mu m-10 mm.
The second aspect of the invention provides a preparation method of the organic silicon resin closed modified fireproof aerogel, which comprises the following steps:
(1) Tetraethyl orthosilicate, water, ethanol and hydrochloric acid are added according to the mass ratio of 1:4:14:10 -4 Hydrolyzing to obtain tetraethyl orthosilicate hydrolysate;
(2) Rapidly stirring, adding alkali solution, adjusting pH to 4-6, and solidifying to obtain gel;
(3) Crushing the solidified gel into small particles, then placing the particles in an ethanol solvent for solvent replacement, adding a micromolecular silane coupling agent containing alkoxy silane into ethanol after multiple solvent replacement, heating and stirring for reacting for a period of time to obtain alkoxy end-capped modified aerogel;
(4) After removing the solvent, adding an ethanol solution of the P-C-N source synergistic flame retardant, removing the ethanol solvent through reduced pressure distillation in the stirring and dispersing process, gradually precipitating and retaining the P-C-N source synergistic flame retardant in the aerogel and on the surface, and further drying to obtain composite gel powder;
(5) Adding the composite gel powder into a low-boiling point fluorine-containing flame retardant, stirring and dispersing completely, adding low-viscosity organic silicon resin, heating until the organic silicon resin and alkoxy on the aerogel surface react completely, separating and drying to obtain the organic silicon resin closed modified fireproof aerogel.
Specifically, the micromolecular silane coupling agent containing the alkoxy silane in the step (3) is one or more of methyltrimethoxysilane, methyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and gamma- (2, 3-glycidoxy) propyltriethoxysilane; the P-C-N source synergistic flame retardant is a mixture of ammonium polyphosphate, dipentaerythritol and melamine, and the mixing proportion is not particularly limited.
Specifically, the low-boiling point fluorine-containing flame retardant in the step (5) is one or more of perfluoro hexanone, perfluoro octane and perfluoro hexane; the low-viscosity silicone resin is a low-viscosity silicone resin which is commercially available or self-made and alkoxy-terminated.
Preferably, the water-based epoxy resin tackifying primer further comprises temperature-controlled microcapsule powder, wherein the powder content is 10-30%, and the water-based epoxy resin tackifying primer is prepared by stirring, mixing and dispersing the water-based epoxy resin.
Specifically, the temperature-control microcapsule powder is a commercially available or self-made phase-change microcapsule, the particle size of the microcapsule powder is 1-20 mu m, the core material is one or more of behenyl, stearyl, methyl stearate and stearyl stearate, and the phase-change point is 20-40 ℃.
The third aspect of the invention provides a preparation method of any one of the aqueous acrylic resin composite modified aerogel heat-insulating fireproof coating, comprising the following steps:
(1) Spraying water-based epoxy resin tackifying primer on the substrate;
(2) Mixing high molecular water-based acrylic resin and prepared organic silicon resin sealing modified fireproof aerogel to obtain composite modified aerogel fireproof finish paint, and spraying the composite modified aerogel fireproof finish paint onto the surface of the water-based epoxy resin tackifying primer;
(3) And drying and curing to obtain the water-based acrylic resin composite modified aerogel heat-insulating fireproof composite coating.
Specifically, the mixing ratio of the high-molecular water-based acrylic resin to the organic silicon resin sealing modified fireproof aerogel is 1:1-10.
Specifically, the high molecular water-based acrylic resin in the step (2) has a molecular weight selected from 5000-200000; the type is selected from one or more of hydroxyethyl acrylate (HEA), methacrylic acid (MMA), acrylamide (AM), glycidyl Methacrylate (GMA), ethylene glycol dimethacrylate (EDGMA), allyl methacrylate, diacetone acrylamide (DAAM), adipic Acid Dihydrazide (ADH) and acetoacetoxyethyl methacrylate (AAEM) aqueous acrylic resin; the solid content is selected from 80% -100%.
Compared with the prior art, the invention has the following beneficial effects:
(1) In the invention, the water-based epoxy resin is used as the tackifying primer, and the adhesive force of the composite coating to the base material is improved by utilizing the advantage of high adhesive strength of the epoxy resin. In addition, a temperature-control phase-change microcapsule is added into the water-based epoxy resin tackifying primer, and the indoor temperature of a building is controlled to be at a proper temperature through heat absorption and heat release of core material phase change in the microcapsule, so that the water-based epoxy resin tackifying primer is energy-saving and environment-friendly; meanwhile, in the early stage of fire, the phase-change microcapsule can reduce the probability of fire occurrence and reduce the fire hazard through heat absorption.
(2) According to the invention, the P-C-N source synergistic flame retardant solid (ammonium polyphosphate, dipentaerythritol and melamine) is introduced into the aerogel by a solution precipitation method, so that on one hand, the influence of the direct addition of the flame retardant on the performance of the water-based acrylate resin is avoided, and the mechanical performance and stability are obviously improved. On the other hand, in the solvent volatilization process, a layer of solid flame retardant mixture is precipitated and attached in the inner holes of the aerogel, so that the aerogel holes are supported. In addition, the flame-retardant principle of the P-C-N source synergistic flame retardant is that flame-retardant gas is decomposed at high temperature, meanwhile, an acid source (containing a P compound) reacts with a C source, an expanded carbon layer with a certain thickness is formed inside aerogel holes, the aerogel holes are released and increased, the internal hole structure of the aerogel is maintained to a large extent, and the heat insulation capacity is improved. And because the aerogel has good fire resistance and heat insulation performance, the P-C-N source synergistic flame retardant reacts and releases heat at high temperature in the aerogel, and the organic resin with poor external fire resistance is not affected, so that the flame retardant effect is improved.
(3) According to the invention, the P-C-N source synergistic flame retardant and the low-boiling point fluorine-containing flame retardant are filled into the aerogel, when the initial temperature of a fire disaster is low, the externally-sealed organic silicon resin and the water-based acrylic acid are burnt and corroded by the fire, the low-boiling point fluorine-containing flame retardant is gasified, on one hand, the holes in the aerogel are filled with flame-retardant gas, the heat insulation capability of the aerogel is greatly improved, and on the other hand, the released flame-retardant gas plays a role in extinguishing the fire disaster. When the temperature is higher in the later stage of fire, the P-C-N source in the aerogel is cooperated with the flame retardant to produce flame retardant gas through endothermic decomposition at high temperature, and the flame retardant gas has better flame retardant effect by being matched with the aerogel with high heat resistance and high heat insulation performance.
(4) In the preparation process of the composite modified aerogel fireproof finish paint, the aerogel is sealed by the organic silicon resin, high-molecular water-based acrylic resin is used, and an organic solvent is not used, so that the damage of the organic solvent and the low-molecular polymer infiltrated aerogel to the aerogel structure is further prevented. The fireproof heat-insulating coating is manufactured by using the heat-insulating coating, so that the coating has the functions of blocking heat diffusion layer by layer, indirectly prolonging the heat conduction path and providing longer reaction time for building materials after firing.
(5) According to the invention, the organic silicon resin and aerogel with excellent water resistance and heat resistance are introduced to modify the water-based acrylate resin with poor water resistance and heat resistance, so that the advantages of good mechanical property and film forming property of the water-based acrylate resin are maintained, and the water resistance and heat resistance of the coating are improved.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be further illustrated, but is not limited, by the following examples.
Example 1
1. Preparing the organic silicon resin sealing modified fireproof aerogel:
1) In an inert gas-shielded reactor, the molar ratio is 1:4:14:10 -4 Adding tetraethyl orthosilicate, water, ethanol and hydrochloric acid for hydrolysis to obtain tetraethyl orthosilicate hydrolysate;
2) Adding an alkali solution into the obtained mixed solution by rapid stirring to adjust the pH of the system to 5, and solidifying to obtain gel;
3) Crushing the solidified gel into small particles, then placing the particles in an ethanol solvent for solvent replacement, adding methyltrimethoxy (silane coupling agent and aerogel with mass ratio of 1:1) into ethanol after 4 times of solvent replacement, heating and stirring for reacting for 48 hours to obtain alkoxy end-capped modified aerogel;
4) After liquid is removed by suction filtration and separation, adding ammonium polyphosphate, dipentaerythritol and melamine to form an ethanol solution of the P-C-N source synergistic flame retardant, removing an ethanol solvent by reduced pressure distillation in the stirring and dispersing process, removing the ethanol solvent by reduced pressure distillation, gradually separating out and retaining the P-C-N source synergistic flame retardant in the aerogel and on the surface of the aerogel, and further drying the composite gel by a vacuum drying box;
5) Adding the composite gel powder obtained in the previous step into perfluorinated hexanone, stirring and dispersing completely, adding alkoxy-terminated low-viscosity organic silicon resin, heating and stirring to react for 48 hours, completely reacting the organic silicon resin with the alkoxy on the aerogel surface, and sealing the low-boiling point fluorine-containing flame retardant inside; separating out liquid, and drying at low temperature to obtain the organic silicon resin closed modified fireproof aerogel.
2. Preparation of a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating sample plate:
1) Spraying water-based epoxy resin tackifying primer on the rock wool board substrate layer to be 30 mu m;
2) 30 parts of organic silicon resin sealing modified fireproof aerogel is dissolved in 70 parts of high-viscosity water-based acrylate resin, and the mixture is stirred and mixed uniformly to form composite modified aerogel fireproof finish paint slurry;
3) Before the tackifying primer is dried, spraying the composite modified aerogel fireproof finish paint slurry on the surface of the primer until the dry film thickness of the composite modified aerogel fireproof finish paint is 200 mu m;
4) And (3) drying to obtain the aerogel heat-insulating fireproof composite coating, wherein the dry film thickness is 200 mu m, and curing for 7 days and testing.
Example 2
1. Preparing the organic silicon resin sealing modified fireproof aerogel:
1) In an inert gas-shielded reactor, the molar ratio is 1:4:14:10 -4 Adding tetraethyl orthosilicate, water, ethanol and hydrochloric acid for hydrolysis to obtain tetraethyl orthosilicate hydrolysate;
2) Adding an alkali solution into the obtained mixed solution by rapid stirring to adjust the pH of the system to 5, and solidifying to obtain gel;
3) Crushing the solidified gel into small particles, then placing the particles in an ethanol solvent for solvent replacement, adding methyltrimethoxy, gamma- (2, 3-glycidoxy) propyl trimethoxy silane (the mass ratio of the silane coupling agent to the aerogel is 1:2) into ethanol after 4 times of solvent replacement, and heating and stirring the mixture for reacting for 48 hours to obtain alkoxy end-capped modified aerogel;
4) After liquid is removed by suction filtration and separation, adding ammonium polyphosphate, dipentaerythritol and melamine to form an ethanol solution of the P-C-N source synergistic flame retardant, removing an ethanol solvent by reduced pressure distillation in the stirring and dispersing process, removing the ethanol solvent by reduced pressure distillation, gradually separating out and retaining the P-C-N source synergistic flame retardant in the aerogel and on the surface of the aerogel, and further drying the composite gel by a vacuum drying box;
5) Adding the composite gel powder in the previous step into perfluorohexane, stirring and dispersing completely, adding alkoxy-terminated low-viscosity organic silicon resin, heating and stirring to react for 48 hours, completely reacting the organic silicon resin with the alkoxy on the aerogel surface, and sealing the low-boiling point fluorine-containing flame retardant inside; separating out liquid, and drying at low temperature to obtain the organic silicon resin closed modified fireproof aerogel.
2. Preparation of a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating sample plate:
1) Spraying water-based epoxy resin tackifying primer on the rock wool board substrate layer to be 20 mu m;
2) 40 parts of organic silicon resin sealing modified fireproof aerogel is dissolved in 60 parts of high-viscosity water-based acrylate resin, and the mixture is stirred and mixed uniformly to form composite modified aerogel fireproof finish paint slurry;
3) Before the tackifying primer is dried, spraying the composite modified aerogel fireproof finish paint slurry on the surface of the primer until the dry film thickness of the composite modified aerogel fireproof finish paint is 3mm;
4) And (3) drying to obtain the aerogel heat-insulating fireproof composite coating, wherein the dry film thickness is 3mm, and curing for 7 days and testing.
Example 3
1. Preparing the organic silicon resin sealing modified fireproof aerogel:
1) In an inert gas-shielded reactor, the molar ratio is 1:4:14:10 -4 Adding tetraethyl orthosilicate, water, ethanol and hydrochloric acid for hydrolysis to obtain tetraethyl orthosilicate hydrolysate;
2) Adding an alkali solution into the obtained mixed solution by rapid stirring to adjust the pH of the system to 6, and solidifying to obtain gel;
3) Crushing the solidified gel into small particles, then placing the particles in an ethanol solvent for solvent replacement, adding dimethyl dimethoxy, gamma- (2, 3-glycidoxy) propyl trimethoxy silane (the mass ratio of the silane coupling agent to the aerogel is 1:1) into the ethanol after 4 times of solvent replacement, and heating and stirring the mixture for reacting for 48 hours to obtain alkoxy end-capped modified aerogel;
4) After liquid is removed by suction filtration and separation, adding ammonium polyphosphate, dipentaerythritol and melamine to form an ethanol solution of the P-C-N source synergistic flame retardant, removing an ethanol solvent by reduced pressure distillation in the stirring and dispersing process, removing the ethanol solvent by reduced pressure distillation, gradually separating out and retaining the P-C-N source synergistic flame retardant in the aerogel and on the surface of the aerogel, and further drying the composite gel by a vacuum drying box;
5) Adding the composite gel powder in the previous step into perfluorooctane, stirring and dispersing completely, adding alkoxy-terminated low-viscosity organic silicon resin, heating and stirring to react for 48 hours, completely reacting the organic silicon resin with the alkoxy on the aerogel surface, and sealing the low-boiling point fluorine-containing flame retardant inside; separating out liquid, and drying at low temperature to obtain the organic silicon resin closed modified fireproof aerogel.
2. Preparation of a water-based acrylic resin composite modified aerogel heat-insulating fireproof coating sample plate:
1) Spraying water-based epoxy resin tackifying primer on the rock wool board substrate layer to be 50 mu m;
2) 40 parts of organic silicon resin sealing modified fireproof aerogel is dissolved in 60 parts of high-viscosity water-based acrylate resin, and the mixture is stirred and mixed uniformly to form composite modified aerogel fireproof finish paint slurry;
3) Before the tackifying primer is dried, spraying the composite modified aerogel fireproof finish paint slurry on the surface of the primer until the dry film thickness of the composite modified aerogel fireproof finish paint is 5mm;
4) And (5) drying to obtain the aerogel heat-insulating fireproof composite coating, wherein the dry film thickness is 5mm, and curing for 7 days and testing.
Comparative example 1
Compared with the example 1, the common hydrophobic aerogel which is not subjected to fireproof modification is adopted to replace the organic silicon resin sealing modified fireproof aerogel in the comparative example 1, and the common hydrophobic aerogel is not subjected to further modification, and the specific steps are as follows:
1. preparation of a common hydrophobic aerogel:
1) The molar ratio is 1:4:14:10 -4 Adding tetraethyl orthosilicate, water, ethanol and hydrochloric acid for hydrolysis to obtain tetraethyl orthosilicate hydrolysate;
2) Adding an alkali solution into the obtained mixed solution by rapid stirring to adjust the pH of the system to 4-6, and solidifying to obtain a composite gel;
3) Crushing the solidified gel into small particles, then placing the particles in an ethanol solvent for solvent replacement, and replacing the solvent in the aerogel by water after 4 times of solvent replacement;
4) Then placing the composite gel subjected to solvent replacement in dimethyl disilazane with the mass 2 times of that of the composite gel for modification for 48 hours;
5) Separating out liquid, and then grading and drying the composite gel under nitrogen hot air to obtain the common hydrophobic aerogel powder.
2. Preparation of aerogel thermal insulation fireproof coating sample plate:
1) Spraying water-based epoxy resin tackifying primer on the rock wool board substrate layer to be 30 mu m;
2) Dissolving 30 parts of common hydrophobic aerogel in 70 parts of high-viscosity water-based acrylate resin, and uniformly stirring and mixing to form aerogel fireproof finish paint slurry;
3) Before the tackifying primer is dried, spraying the aerogel fireproof finish paint slurry on the surface of the primer until the dry film thickness of the aerogel fireproof finish paint is 200 mu m;
4) And (3) drying to obtain the aerogel heat-insulating fireproof composite coating, wherein the dry film thickness is 200 mu m, and curing for 7 days and testing.
Comparative example 2
Compared with example 1, the non-tackifying primer is specifically as follows:
1) 30 parts of organic silicon resin sealing modified fireproof aerogel is taken and dissolved in 70 parts of high-viscosity water-based acrylate resin, and the mixture is stirred and mixed uniformly to form aerogel fireproof finish paint slurry;
2) Spraying aerogel fireproof finish paint slurry on a rock wool board substrate layer until the dry film thickness is 200 mu m;
3) And (3) drying to obtain the aerogel heat-insulating fireproof composite coating, wherein the dry film thickness is 200 mu m, and curing for 7 days and testing.
Comparative example 3
Compared with example 1, the thickness of the finishing paint is the sum of the thicknesses of the finishing paints in comparative example 1, wherein the finishing paint is prepared by using only the tackifying primer and the high-viscosity water-based acrylate resin, and not using the silicone resin for sealing and modifying the fireproof aerogel as a coating filler.
The sample performance tests provided in the examples of the present invention and comparative examples are shown in table 1:
as can be seen from the data in table 1, the present invention significantly improves the adhesion of the composite coating (the adhesion is improved from 1A in comparative example 2 to 5A in example 2) by using the epoxy resin having strong adhesion to the substrate as the primer through the special coating design; and as can be seen from the flame-retardant time of examples 1 and 2, the flame-retardant time is obviously prolonged as the thickness of the fireproof finish paint increases; in addition, the composite fireproof modification and filling of the aerogel can enable the coating to have the function of blocking heat diffusion layer by layer, release and decomposition of the flame retardant at high temperature can keep the pore structure in the aerogel, the thermal conductivity is reduced after expansion at high temperature, the heat insulation property is improved, the flame retardant time of the coating is greatly prolonged, and longer reaction time is provided for building materials after ignition (the flame retardant time of comparative examples 1 and 3 is greatly lower than that of example 1). It can also be seen from the water resistance test results of comparative example 3 and example 1 that the aerogel and silicone resin incorporated in the coating significantly improved the water resistance of the coating.
Table 1 results of sample performance tests prepared in examples and comparative examples
Claims (10)
1. The water-based acrylic resin composite modified aerogel heat-insulating fireproof coating is characterized by comprising a water-based epoxy resin tackifying primer and a composite modified aerogel fireproof finish paint; the composite modified aerogel fireproof finish paint comprises organic silicon resin sealing modified fireproof aerogel and high-viscosity water-based acrylate resin.
2. The aqueous acrylic resin composite modified aerogel heat insulation fireproof coating according to claim 1, wherein the dry film thickness of the aqueous epoxy resin tackifying primer is 10-100 μm; the dry film thickness of the composite modified aerogel fireproof finish paint is 100 mu m-10 mm.
3. The aqueous acrylic resin composite modified aerogel thermal insulation fire protection coating of claim 1, wherein the preparation of the silicone resin closed modified fire protection aerogel comprises the following steps:
(1) The tetraethyl orthosilicate, water, ethanol and hydrochloric acid are added according to the mass ratio of 1:4:14:10 -4 Hydrolyzing to obtain tetraethyl orthosilicate hydrolysate;
(2) Rapidly stirring, adding alkali solution, adjusting pH to 4-6, and solidifying to obtain gel;
(3) Crushing the solidified gel into small particles, then placing the particles in an ethanol solvent for solvent replacement, adding a micromolecular silane coupling agent containing alkoxy silane into ethanol after multiple solvent replacement, heating and stirring for reacting for a period of time to obtain alkoxy end-capped modified aerogel;
(4) After removing the solvent, adding an ethanol solution of the P-C-N source synergistic flame retardant, removing the ethanol solvent through reduced pressure distillation in the stirring and dispersing process, gradually precipitating and retaining the P-C-N source synergistic flame retardant in the aerogel and on the surface, and further drying to obtain composite gel powder;
(5) Adding the composite gel powder into a low-boiling point fluorine-containing flame retardant, stirring and dispersing completely, adding low-viscosity organic silicon resin, heating until the organic silicon resin and alkoxy on the aerogel surface react completely, separating and drying to obtain the organic silicon resin closed modified fireproof aerogel.
4. The water-based acrylic resin composite modified aerogel heat-insulating fireproof coating according to claim 3, wherein the micromolecular silane coupling agent containing alkoxy silane in the preparation step (3) is one or more of methyltrimethoxysilane, methyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and gamma- (2, 3-glycidoxy) propyltriethoxysilane; the P-C-N source synergistic flame retardant is a mixture of ammonium polyphosphate, dipentaerythritol and melamine.
5. The aqueous acrylic resin composite modified aerogel heat-insulating fireproof coating according to claim 3, wherein the low-boiling point fluorine-containing flame retardant in the preparation step (5) is one or more of perfluoro hexanone, perfluoro octane and perfluoro hexane; the low viscosity silicone resin is an alkoxy-terminated low viscosity silicone resin.
6. The aqueous acrylic resin composite modified aerogel heat-insulating fireproof coating according to claim 1, wherein the aqueous epoxy resin tackifying primer further comprises temperature-control microcapsule powder, the powder content is 10-30%, and the aqueous epoxy resin composite modified aerogel heat-insulating fireproof coating is prepared by stirring, mixing and dispersing the aqueous epoxy resin tackifying primer and the aqueous epoxy resin.
7. The water-based acrylic resin composite modified aerogel heat-insulating fireproof coating according to claim 1, wherein the temperature-control microcapsule powder is phase-change microcapsule, the particle size of the phase-change microcapsule is 1-20 mu m, the core material is one or more of behenyl, stearyl, methyl stearate and stearyl stearate, and the phase-change point is 20-40 ℃.
8. A method for preparing the aqueous acrylic resin composite modified aerogel heat-insulating fireproof coating according to any one of claims 1 to 7, which is characterized by comprising the following steps:
(1) Spraying water-based epoxy resin tackifying primer on the substrate;
(2) Mixing high molecular water-based acrylic resin and prepared organic silicon resin sealing modified fireproof aerogel to obtain composite modified aerogel fireproof finish paint, and spraying the composite modified aerogel fireproof finish paint onto the surface of the water-based epoxy resin tackifying primer;
(3) And drying and curing to obtain the water-based acrylic resin composite modified aerogel heat-insulating fireproof composite coating.
9. The method for preparing the water-based acrylic resin composite modified aerogel heat-insulating fireproof composite coating according to claim 8, wherein the mixing ratio of the high-molecular water-based acrylic resin to the prepared organic silicon resin closed modified fireproof aerogel is 1:1-10.
10. The preparation method of the water-based acrylic resin composite modified aerogel heat-insulating fireproof composite coating according to claim 8, wherein the molecular weight of the high-molecular water-based acrylic resin in the step (2) is selected from 5000-200000, and is one or more of hydroxyethyl acrylate, methacrylic acid, acrylamide, glycidyl methacrylate, ethylene glycol dimethacrylate, allyl methacrylate, diacetone acrylamide, adipic acid dihydrazide and acetoacetoxyethyl methacrylate water-based acrylic resins; the solid content is 80-100%.
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| CN116785637A (en) * | 2023-06-12 | 2023-09-22 | 浙江岩谷科技有限公司 | Efficient aerogel fire extinguishing agent and preparation method thereof |
| CN116850522A (en) * | 2023-05-26 | 2023-10-10 | 广东黑卫防火技术有限公司 | Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device |
| CN117430372A (en) * | 2023-11-08 | 2024-01-23 | 武汉中科先进材料科技有限公司 | Dispersible aerogel particles and preparation method and application thereof |
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| CN116850522B (en) * | 2023-05-26 | 2024-04-23 | 广东黑卫防火技术有限公司 | Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device |
| CN116785637A (en) * | 2023-06-12 | 2023-09-22 | 浙江岩谷科技有限公司 | Efficient aerogel fire extinguishing agent and preparation method thereof |
| CN116785637B (en) * | 2023-06-12 | 2024-03-29 | 浙江岩谷科技有限公司 | Efficient aerogel fire extinguishing agent and preparation method thereof |
| CN117430372A (en) * | 2023-11-08 | 2024-01-23 | 武汉中科先进材料科技有限公司 | Dispersible aerogel particles and preparation method and application thereof |
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