CN115160881A - Water-based flame-retardant damping coating and preparation method thereof - Google Patents
Water-based flame-retardant damping coating and preparation method thereof Download PDFInfo
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- CN115160881A CN115160881A CN202210986350.4A CN202210986350A CN115160881A CN 115160881 A CN115160881 A CN 115160881A CN 202210986350 A CN202210986350 A CN 202210986350A CN 115160881 A CN115160881 A CN 115160881A
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- 238000013016 damping Methods 0.000 title claims abstract description 112
- 238000000576 coating method Methods 0.000 title claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000011248 coating agent Substances 0.000 title claims abstract description 73
- 239000003063 flame retardant Substances 0.000 title claims abstract description 45
- 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 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims description 29
- 239000000839 emulsion Substances 0.000 claims abstract description 137
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 57
- 239000002562 thickening agent Substances 0.000 claims abstract description 21
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 239000013530 defoamer Substances 0.000 claims abstract description 3
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 88
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 44
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 40
- 239000003999 initiator Substances 0.000 claims description 38
- 239000003995 emulsifying agent Substances 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 35
- 239000003973 paint Substances 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 24
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 20
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 20
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 20
- 239000011787 zinc oxide Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 19
- 239000006185 dispersion Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 14
- 239000012752 auxiliary agent Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 239000002518 antifoaming agent Substances 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 11
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 10
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 claims description 10
- VFTKIWJJPDJBKD-UHFFFAOYSA-N OCCC[Na] Chemical compound OCCC[Na] VFTKIWJJPDJBKD-UHFFFAOYSA-N 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 10
- 125000005336 allyloxy group Chemical group 0.000 claims description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 10
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 10
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 10
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 claims description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 2
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010455 vermiculite Substances 0.000 claims description 2
- 229910052902 vermiculite Inorganic materials 0.000 claims description 2
- 235000019354 vermiculite Nutrition 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 5
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- 239000007864 aqueous solution Substances 0.000 description 42
- 230000001133 acceleration Effects 0.000 description 18
- 238000010438 heat treatment Methods 0.000 description 16
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 13
- 239000011258 core-shell material Substances 0.000 description 11
- 238000001035 drying Methods 0.000 description 11
- 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 description 10
- 239000002245 particle Substances 0.000 description 10
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical group CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 description 9
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical group [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 8
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- 229910052627 muscovite Inorganic materials 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 6
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 6
- 229920001778 nylon Polymers 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000004246 zinc acetate Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
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- 239000007788 liquid Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
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- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical group [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
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- 239000000243 solution Substances 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 2
- 229940007718 zinc hydroxide Drugs 0.000 description 2
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 2
- VPSXHKGJZJCWLV-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-(1-ethylpiperidin-4-yl)oxypyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OC1CCN(CC1)CC VPSXHKGJZJCWLV-UHFFFAOYSA-N 0.000 description 1
- 241000234282 Allium Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 235000019580 granularity Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- 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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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- 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
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- 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
- C09D7/43—Thickening agents
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- 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
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- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
Abstract
The invention discloses a water-based flame-retardant damping coating which comprises the following components in parts by weight: 30-60 parts of styrene-acrylic emulsion for high-damping coatings, 10-30 parts of filler, 10-20 parts of flame retardant, 0.2-0.8 part of dispersant, 0.2-0.8 part of defoamer, 1-2 parts of film-forming assistant, 1-1.5 parts of thickener and 0.5-1.5 parts of short fiber. According to the invention, the high polymer composition in the styrene-acrylic emulsion is adjusted, so that the damping peak is about 23 ℃ (the optimal loss factor reaches 2.0), the width of the peak is wider (-10-80 ℃, and the loss factor is more than 0.3), and the obtained damping coating solves the problems of narrower damping temperature range and low damping coefficient of the traditional water-based damping coating, and solves the problems of flame retardance and acid and alkali resistance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to styrene-acrylic emulsion for a high-damping coating and a preparation method thereof, and a water-based flame-retardant damping coating and a preparation method thereof.
Background
The damping coating has the advantages of convenience and safety in construction, environmental friendliness, high bonding strength and the like; and the damping material has smaller specific gravity, and can meet the requirement of material lightweight. When the damping material for the automobile is used on the outer parts of the automobile, such as a bottom plate, a mudguard, a wheel cover and the like, the damping material can effectively absorb energy generated by the impact of crushed stones and sand grains on the automobile in the driving process, and prevent the automobile from being damaged and rusted; when the material is used in the vehicle interior, the material can reduce the vibration generated by the vehicle engine and reduce the noise, and is a very widely applied material at present. With the change of environment, the requirements on the flame retardance, acid and alkali resistance and environmental protection performance of the damping coating are higher and higher in the application process of the damping coating.
Among all damping materials, the most studied and most widely used viscoelastic damping material, i.e. polymeric damping material, is mainly due to the following reasons: (1) The high polymer material has obvious viscoelasticity and large internal consumption, and can realize high damping; (2) The high molecular materials are various in types, and can be subjected to molecular design according to different requirements; (3) The polymer material has good processing performance and can be made into various shapes. The traditional water-based damping coating has the defects of narrow damping temperature range and low damping coefficient, and influences the practical application of the water-based damping coating. A water-based flame-retardant damping paint (20171042457637) disclosed that an acrylic monomer grafted in epoxy resin is used as a film-forming substance. Chinese patent water-based flame-retardant damping paint (2018105334755) discloses glass powder as a flame retardant and pure acrylic emulsion and the like as film-forming substances. The Chinese patent halogen-free high flame-retardant damping coating (2016109312826) discloses a coating mainly using antimony trioxide as a flame retardant and pure acrylic emulsion and the like as film forming substances. However, the method is high in cost and is not beneficial to industrial production. In the above invention, no high-damping-coefficient, wide-temperature-range polymer film-forming substance is used.
There is a polymer damping peak of 40.68 ℃ reported in documents (Jie, chen, wangkun, etc.. Preparation and performance research of styrene-acrylic emulsion for high damping coatings [ J ]. Coating industry, 2017,47 (10): 23-28.), and is not at a temperature of about 25 ℃ commonly used for damping materials.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides styrene-acrylic emulsion for a high-damping coating and a preparation method thereof, and a water-based flame-retardant damping coating and a preparation method thereof. The invention adjusts the macromolecule composition in the styrene-acrylic emulsion to make the damping peak at about 23 ℃ (the best loss factor reaches 2.0), and the width of the peak is wider (-10-80 ℃, and the loss factor is more than 0.3). The obtained damping coating solves the problems of narrow damping temperature range and low damping coefficient of the traditional water-based damping coating, and solves the problems of flame retardance and acid and alkali resistance of the coating.
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
(1) Adding 15-25 parts by weight of allyloxy hydroxypropyl sodium sulfonate, 3.8-5.8 parts by weight of sodium bicarbonate and 12-20 parts by weight of first emulsifier into 1000-1200 parts by weight of water, uniformly mixing, adjusting the temperature to 70-90 ℃, adding 110-130 parts by weight of first pre-emulsion and 21.2-25.5 parts by weight of 12-15% of first initiator, and reacting for 20-40min;
(2) Adjusting the temperature to 80-90 ℃, respectively adding 676-700 parts of first pre-emulsion, 57.2-69.2 parts of second initiator with the mass fraction of 4-6%, preserving the heat for 20-40min, respectively adding 1900-1980 parts of second pre-emulsion, 113.2-133.2 parts of third initiator with the mass fraction of 3.1-5.1%, preserving the heat for 5-20min, adding 10-20 parts of fourth initiator with the mass fraction of 5.1-8.1%, preserving the heat for 100-150min;
(3) Cooling to 55-65 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, cooling to below 40-50 ℃, and filtering to obtain the styrene-acrylic emulsion for the high-damping coating.
Preferably, in step (1) or step (2), the first pre-emulsion comprises: ethyl acrylate, butyl acrylate, a second emulsifier and water; the mass ratio of the ethyl acrylate to the butyl acrylate to the second emulsifier to the water is 310-330:195-205:6-10:275-285.
Preferably, in step (2), the second pre-emulsion comprises: butyl acrylate, hydroxymethyl acrylamide, styrene, hydroxyethyl acrylate, a silane coupling agent, a second emulsifier and water; the mass ratio of butyl acrylate, hydroxymethyl acrylamide, styrene, hydroxyethyl acrylate, a silane coupling agent, a second emulsifier to water is 590-610:55-60:550-570:35-45:30-34:6-10:575-585.
Preferably, in the step (2), the dropping speed of the first pre-emulsion is 10-13g/min, and the dropping speed of the second initiator is 0.8-1.2g/min; the dropping speed of the second pre-emulsion is 14.2-18.2g/min, and the dropping speed of the third initiator is 0.8-1.2g/min; the dropping speed of the fourth initiator is 0.8-1.2g/min.
Preferably, the first initiator, the second initiator, the third initiator and the fourth initiator are persulfate salts, preferably ammonium persulfate.
Preferably, in step (2), the time for dropping the second pre-emulsion and the third initiator is the same.
The preparation method of the styrene-acrylic emulsion for the high-damping coating comprises the following steps:
(1) Adding 15-25 parts by weight of allyloxy hydroxypropyl sodium sulfonate, 3.8-5.8 parts by weight of sodium bicarbonate and 12-20 parts by weight of first emulsifier into 1000-1200 parts by weight of water, uniformly mixing, adjusting the temperature to 70-90 ℃, adding 110-130 parts by weight of first pre-emulsion and 21.2-25.5 parts by weight of 12-15% of first initiator, and reacting for 20-40min;
(2) Adjusting the temperature to 80-90 ℃, respectively adding 676-700 parts of first pre-emulsion and 57.2-69.2 parts of second initiator with the mass fraction of 4-6%, preserving heat for 20-40min, respectively adding 1900-1980 parts of second pre-emulsion and 113.2-133.2 parts of third initiator with the mass fraction of 3.1-5.1%, preserving heat for 5-20min, adding 10-20 parts of fourth initiator with the mass fraction of 5.1-8.1%, preserving heat for 100-150min;
(3) Cooling to 55-65 deg.C, adding ammonia water to adjust pH to 7.5-8, heating to 75-85 deg.C, holding the temperature for 1-2h, cooling to below 45 deg.C, and filtering.
The invention adopts a semi-continuous method to synthesize the styrene-acrylic emulsion with the core-shell structure, firstly synthesizes nano-scale emulsion particles as seeds, then covers the surface layer by layer to form a structure similar to an onion, and then adds alkali to the obtained styrene-acrylic emulsion for neutralization, thereby improving the stability of the emulsion particles in the solution.
Preferably, step (1) further comprises: the active zinc oxide is added with sodium bicarbonate at the same time, and the mass ratio of the active zinc oxide to the sodium bicarbonate is (2-4): 3.8-5.8; the active zinc oxide is zinc oxide nano-particles loaded in a polyvinyl alcohol network mesh.
Preferably, the active zinc oxide is prepared by the following specific steps: adding polyvinyl alcohol into deionized water, stirring uniformly, adding zinc acetate, stirring at 80-90 ℃ for 1-2h, adjusting the pH value of the system to 7.2-8, continuing stirring for 1-2h, filtering, drying, heating at 150-170 ℃ for 10-30min in an oxygen atmosphere, and cooling to room temperature to obtain the activated zinc oxide.
The invention adopts the compounding of polyvinyl alcohol and zinc acetate, and the complexation of zinc ions and polyvinyl alcohol side chain groups to limit the zinc ions in polyvinyl alcohol network meshes, then the zinc ions are converted into zinc hydroxide seed crystals under the alkaline condition, and the zinc hydroxide seed crystals are heated and oxidized and decomposed at 150-170 ℃, so that the nano zinc oxide particles are uniformly combined and arranged in the polyvinyl alcohol network meshes.
Preferably, in the step of preparing the active zinc oxide, the mass ratio of the polyvinyl alcohol to the zinc acetate is 1-3:0.1-1.
The preparation method of the styrene-acrylic emulsion for the high-damping coating comprises the following steps:
(1) Adding 15-25 parts by weight of allyloxy hydroxypropyl sodium sulfonate, 3.8-5.8 parts by weight of sodium bicarbonate, 2-4 parts by weight of active zinc oxide and 12-20 parts by weight of first emulsifier into 1000-1200 parts by weight of water, uniformly mixing, adjusting the temperature to 70-90 ℃, adding 110-130 parts by weight of first pre-emulsion and 21.2-25.5 parts by weight of first initiator with the mass fraction of 12-15%, and reacting for 20-40min;
(2) Adjusting the temperature to 80-90 ℃, respectively adding 676-700 parts of first pre-emulsion, 57.2-69.2 parts of second initiator with the mass fraction of 4-6%, preserving the heat for 20-40min, respectively adding 1900-1980 parts of second pre-emulsion, 113.2-133.2 parts of third initiator with the mass fraction of 3.1-5.1%, preserving the heat for 5-20min, adding 10-20 parts of fourth initiator with the mass fraction of 5.1-8.1%, preserving the heat for 100-150min;
(3) Cooling to 55-65 deg.C, adding ammonia water to adjust pH to 7.5-8, heating to 75-85 deg.C, holding the temperature for 1-2h, cooling to below 45 deg.C, and filtering.
The activated zinc oxide obtained by the invention is combined with the styrene-acrylic emulsion, the affinity of the activated zinc oxide and the styrene-acrylic emulsion is excellent, the activated zinc oxide can be uniformly coated on the surface of the latex particles of the styrene-acrylic emulsion, and the activated zinc oxide is combined through electrostatic combination to form a product, so that not only is medium molecules not easy to permeate or diffuse into the particles in an acid-base environment, but also the damage of the medium molecules to the internal latex particles is effectively avoided, and the corrosion resistance stability of a system is further effectively improved due to the uniformly coated zinc oxide on the surface of the activated zinc oxide.
The styrene-acrylic emulsion for the high-damping coating is prepared by adopting the preparation method of the styrene-acrylic emulsion for the high-damping coating.
Preferably, the styrene-acrylic emulsion for the high-damping coating is of a core-shell structure.
The water-based flame-retardant damping coating comprises the following components in parts by weight: 30-60 parts of styrene-acrylic emulsion for the high-damping coating, 10-30 parts of filler, 10-20 parts of flame retardant, 0.2-0.8 part of dispersant, 0.2-0.8 part of defoaming agent, 1-2 parts of film-forming assistant, 1-1.5 parts of thickener and 0.5-1.5 parts of short fiber.
Preferably, the composition comprises the following components in parts by weight: 40-50 parts of styrene-acrylic emulsion for the high-damping coating, 15-25 parts of filler, 10-15 parts of flame retardant, 0.2-0.8 part of dispersant, 0.2-0.8 part of defoamer, 1-2 parts of film-forming assistant, 1-5 parts of multifunctional assistant, 1-1.5 parts of thickener and 0.5-1.5 parts of short fiber.
Preferably, the components also comprise: the mass ratio of the talcum powder to the flame retardant is 15-19:10-20.
Preferably, the filler is muscovite powder or/and sericite powder, and the particle size of the filler is 40-200 meshes. The filler with multiple granularities is mixed for use, which is helpful for improving the density and the mechanical strength of a dry film of the damping coating, is helpful for improving the drying speed of the coating, and is helpful for improving the damping factor of the damping coating.
Preferably, the fire retardant is at least one of vermiculite, hollow glass beads and aluminum hydroxide.
Preferably, the film forming auxiliary agent is at least one of propylene glycol butyl ether, propylene glycol methyl ether acetate and alcohol ester-12.
Preferably, the multifunctional adjuvant is AMP-95 multifunctional adjuvant.
Preferably, the thickener is an acrylic thickener or/and a polyurethane thickener.
Preferably, the staple fibers are fibers having a length of 5-9mm and a diameter of 1 mm.
The preparation method of the water-based flame-retardant damping paint is characterized by comprising the following steps:
(1) Continuously stirring the high-damping coating with styrene-acrylic emulsion at a stirring speed of 500r/min, adding a dispersing agent, a defoaming agent and short fibers, and stirring for 20-30min at a stirring speed of 800r/min to obtain a premix;
(2) Uniformly premixing the filler and the flame retardant, adding the premixed material for dispersing for 30-50min at the dispersion speed of 1500r/min, adding the multifunctional auxiliary agent and the film-forming auxiliary agent, and stirring for 30-50min to obtain a mixed solution system;
(3) And adding the thickening agent into the mixed solution system for dispersion for 20-30min at the dispersion speed of 1000r/min to obtain the water-based flame-retardant damping paint.
The invention adopts the water-based styrene-acrylic emulsion as a main film forming substance, the mechanical property of the damping coating is enhanced by adding the filler and the auxiliary agent for mixing, and the dispersing agent and the defoaming agent are added to ensure that the coating can be better mixed in the preparation process and obtain a compact product. Meanwhile, the thickening agent is added to achieve a good thickening effect, so that the bonding strength of the coating can be remarkably enhanced. The addition of the talcum powder and the film-forming additive makes the coating easier to construct and greatly shortens the surface drying and actual drying time.
The invention has the following prominent substantive characteristics and obvious advantages: the raw materials adopted by the invention are simple and easy to obtain, the preparation process is simple and easy to implement, and the preparation cost is low. Firstly, the damping coating has excellent water resistance, acid resistance and alkali resistance, and the service life of the coating can be effectively prolonged; secondly, as the adopted emulsion is water-based emulsion, the raw materials are green and environment-friendly and pollution-free, so that the prepared product has no toxic and harmful substances and is green and environment-friendly; thirdly, the damping coating has good cohesiveness, high surface drying and actual drying speed and simple preparation process, and is suitable for industrial production.
Drawings
FIG. 1 is a graph showing the damping properties of the styrene-acrylic emulsion obtained in example 3.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example 1
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
s1, adding 15g of a reactive emulsifier UCAN-1 (allyloxy hydroxypropyl sodium sulfonate), 3.8g of sodium bicarbonate and 12g of an emulsifier FS-935 into 1000 parts of water, uniformly mixing, heating to 73 ℃, adding 110g of a first pre-emulsion and 21.2g of an ammonium persulfate aqueous solution with the mass fraction of 12%, and reacting for 20min;
s2, adjusting the temperature to 83 ℃, and respectively adding 676g of the first pre-emulsion and 57.2g of an ammonium persulfate aqueous solution with the mass fraction of 4%, wherein the dropping speed of the first pre-emulsion is 10g/min, and the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 4% is 0.8g/min; preserving the heat for 20min;
keeping the temperature at 83 ℃, respectively adding 1901g of a second pre-emulsion and 113.2g of an ammonium persulfate aqueous solution with the mass fraction of 3.1%, wherein the dropping speed of the second pre-emulsion is 14.2g/min, the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 3.1% is 0.8g/min, and the second pre-emulsion and a third initiator are dropped simultaneously; keeping the temperature for 8min;
continuously maintaining the temperature at 83 ℃, adding 10g of 5.1 percent aqueous solution of ammonium persulfate, wherein the acceleration of 5.1 percent aqueous solution of ammonium persulfate drops is 0.8g/min; preserving the heat for 110min;
and S3, cooling to 58 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, cooling to 40 ℃, and filtering by using a 300-mesh nylon bag.
The first pre-emulsion comprises: 310g of ethyl acrylate, 195g of butyl acrylate, 4366g of emulsifier CO-and 275g of water.
The second pre-emulsion comprises: 590g of butyl acrylate, 115g of hydroxymethyl acrylamide with solid content of 48%, 550g of styrene, 35g of hydroxyethyl acrylate, 57030g of silane coupling agent, 4366g of emulsifier CO and 575g of water.
Example 2
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
s1, adding 25g of a reactive emulsifier UCAN-1 (allyloxy hydroxypropyl sodium sulfonate), 5.8g of sodium bicarbonate and 20g of an emulsifier FS-935 into 1200g of water, uniformly mixing, heating to 83 ℃, adding 130g of a first pre-emulsion and 25.5g of an ammonium persulfate aqueous solution with the mass fraction of 15%, and reacting for 40min;
s2, adjusting the temperature to 85 ℃, and respectively adding 700g of first pre-emulsion and 69.2g of 6% aqueous solution of ammonium persulfate by mass fraction, wherein the dropping speed of the first pre-emulsion is 13g/min, and the acceleration of 6% aqueous solution of ammonium persulfate by mass fraction is 1.2g/min; preserving the heat for 40min;
maintaining the temperature at 85 ℃, respectively adding 1979g of a second pre-emulsion and 133.2g of an ammonium persulfate aqueous solution with the mass fraction of 5.1%, wherein the dropping speed of the second pre-emulsion is 18.2g/min, the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 5.1% is 1.2g/min, and the second pre-emulsion and a third initiator are dropped simultaneously; keeping the temperature for 12min;
continuously maintaining the temperature at 85 ℃, adding 20g of 8.1 percent aqueous solution of ammonium persulfate, wherein the acceleration of 8.1 percent aqueous solution of ammonium persulfate drops is 1.2g/min; preserving the heat for 130min;
and S3, cooling to 62 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, cooling to 45 ℃, and filtering by using a 300-mesh nylon bag.
The first pre-emulsion comprises: 330g of ethyl acrylate, 205g of butyl acrylate, 43610g of emulsifier CO and 285g of water.
The second pre-emulsion comprises: 610g of butyl acrylate, 125g of hydroxymethyl acrylamide with the solid content of 48%, 570g of styrene, 45g of hydroxyethyl acrylate, 57034g of silane coupling agent, 43610g of emulsifier and 585g of water.
Example 3
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
s1, adding 20g of a reactive emulsifier UCAN-1 (allyloxy hydroxypropyl sodium sulfonate), 4.8g of sodium bicarbonate and 16g of an emulsifier FS-935 into 1171.77g of water, uniformly mixing, heating to 78 ℃, adding 120g of a first pre-emulsion and 23.2g of an ammonium persulfate aqueous solution with the mass fraction of 13.79%, and reacting for 30min;
s2, adjusting the temperature to 84 ℃, and respectively adding 688g of first pre-emulsion and 63.2g of aqueous solution of ammonium persulfate with the mass fraction of 5.06 percent, wherein the dropping speed of the first pre-emulsion is 12g/min, and the acceleration of the drop of the aqueous solution of ammonium persulfate with the mass fraction of 5.06 percent is 1g/min; preserving the heat for 30min;
maintaining the temperature at 84 ℃, respectively adding 1940g of a second pre-emulsion and 123.2g of an ammonium persulfate aqueous solution with the mass fraction of 2.60%, wherein the dropping speed of the second pre-emulsion is 16.2g/min, the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 2.60% is 1g/min, and the second pre-emulsion and a third initiator are dropped simultaneously; preserving the heat for 10min;
continuously maintaining the temperature at 84 ℃, adding 15g of ammonium persulfate aqueous solution with the mass fraction of 6.67 percent, wherein the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 6.67 percent is 1g/min; preserving the heat for 120min;
and S3, cooling to 60 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, cooling to 42 ℃, and filtering by using a 300-mesh nylon bag to obtain the styrene-acrylic emulsion for the high-damping coating with the solid content of 43%.
The first pre-emulsion comprises: 320g of ethyl acrylate, 200g of butyl acrylate, 4368g of emulsifier CO and 280g of water.
The second pre-emulsion comprises: 600g of butyl acrylate, 120g of hydroxymethyl acrylamide with the solid content of 48%, 560g of styrene, 40g of hydroxyethyl acrylate, KH57032g of silane coupling agent, 4368g of emulsifier and 580g of water.
The styrene-acrylic emulsion obtained in the embodiment is subjected to damping performance test, and specifically comprises the following steps: pouring the emulsion into a self-made rubber mold with the size of 8cm multiplied by 1cm, forming a film at room temperature, and then placing the film in a constant-temperature oven with the temperature of 60 ℃ for drying for 48 hours to prepare a sample strip with the thickness of 5 mm.
The damping performance of the styrene-acrylic emulsion adhesive film is tested by adopting a compression mode of DMAQ800 of American TA company, the testing temperature range is-50-100 ℃, the testing frequency is 1Hz, and the heating rate is 3 ℃/min.
As shown in figure 1, the maximum damping peak temperature of the obtained styrene-acrylic emulsion adhesive film is 23 ℃, the maximum loss factor reaches 2.0, the peak width is-10 ℃ to 80 ℃, and the loss factor is more than 0.3.
Example 4
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
s1, adding 20g of a reactive emulsifier UCAN-1 (allyloxy hydroxypropyl sodium sulfonate), 4.8g of sodium bicarbonate, 2g of active zinc oxide and 16g of an emulsifier FS-935 into 1171.77g of water, uniformly mixing, heating to 78 ℃, adding 120g of a first pre-emulsion and 23.2g of an ammonium persulfate aqueous solution with the mass fraction of 13.79%, and reacting for 30min;
s2, adjusting the temperature to 84 ℃, and respectively adding 688g of the first pre-emulsion and 63.2g of an ammonium persulfate aqueous solution with the mass fraction of 5.06%, wherein the dropping speed of the first pre-emulsion is 12g/min, and the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 5.06% is 1g/min; preserving the heat for 30min;
maintaining the temperature at 84 ℃, respectively adding 1940g of a second pre-emulsion and 123.2g of an ammonium persulfate aqueous solution with the mass fraction of 2.60%, wherein the dropping speed of the second pre-emulsion is 16.2g/min, the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 2.60% is 1g/min, and the second pre-emulsion and a third initiator are dropped simultaneously; preserving the heat for 10min;
continuously maintaining the temperature at 84 ℃, adding 15g of ammonium persulfate aqueous solution with the mass fraction of 6.67 percent, wherein the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 6.67 percent is 1g/min; preserving the heat for 120min;
and S3, cooling to 60 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, heating to 75 ℃, keeping the temperature for 1h, cooling to 42 ℃, and filtering by using a 300-mesh nylon bag.
The first pre-emulsion comprises: 320g of ethyl acrylate, 200g of butyl acrylate, 4368g of emulsifier CO and 280g of water.
The second pre-emulsion comprises: 600g of butyl acrylate, 120g of hydroxymethyl acrylamide with the solid content of 48%, 560g of styrene, 40g of hydroxyethyl acrylate, 57032g of silane coupling agent, CO-4368g of emulsifier and 580g of water.
The active zinc oxide is prepared by the following specific steps: adding 1g of polyvinyl alcohol into 10g of deionized water, uniformly stirring, adding 0.1g of zinc acetate, stirring for 1h at the temperature of 80 ℃, adjusting the pH value of the system to be 7.2-8, continuously stirring for 1h, filtering, drying, adding into a heating furnace, keeping the temperature at 150 ℃ for 10min in an oxygen atmosphere, and cooling to room temperature to obtain the activated zinc oxide.
Example 5
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
s1, adding 20g of a reactive emulsifier UCAN-1 (allyloxy hydroxypropyl sodium sulfonate), 4.8g of sodium bicarbonate, 4g of active zinc oxide and 16g of an emulsifier FS-935 into 1171.77g of water, uniformly mixing, heating to 78 ℃, adding 120g of a first pre-emulsion and 23.2g of an ammonium persulfate aqueous solution with the mass fraction of 13.79%, and reacting for 30min;
s2, adjusting the temperature to 84 ℃, and respectively adding 688g of the first pre-emulsion and 63.2g of an ammonium persulfate aqueous solution with the mass fraction of 5.06%, wherein the dropping speed of the first pre-emulsion is 12g/min, and the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 5.06% is 1g/min; preserving the heat for 30min;
maintaining the temperature at 84 ℃, respectively adding 1940g of a second pre-emulsion and 123.2g of an ammonium persulfate aqueous solution with the mass fraction of 2.60%, wherein the dropping speed of the second pre-emulsion is 16.2g/min, the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 2.60% is 1g/min, and the second pre-emulsion and a third initiator are dropped at the same time; preserving the heat for 10min;
continuously maintaining the temperature at 84 ℃, adding 15g of ammonium persulfate aqueous solution with the mass fraction of 6.67 percent, wherein the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 6.67 percent is 1g/min; preserving the heat for 120min;
and S3, cooling to 60 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, heating to 85 ℃, keeping the temperature for 2 hours, cooling to 42 ℃, and filtering by using a 300-mesh nylon bag.
The first pre-emulsion comprises: 320g of ethyl acrylate, 200g of butyl acrylate, 4368g of emulsifier CO and 280g of water.
The second pre-emulsion comprises: 600g of butyl acrylate, 120g of hydroxymethyl acrylamide with the solid content of 48%, 560g of styrene, 40g of hydroxyethyl acrylate, KH57032g of silane coupling agent, 4368g of emulsifier and 580g of water.
The active zinc oxide is prepared by the following specific steps: adding 3g of polyvinyl alcohol into 20g of deionized water, uniformly stirring, adding 1g of zinc acetate, stirring at the temperature of 90 ℃ for 2h, adjusting the pH value of the system to 7.2-8, continuously stirring for 2h, filtering, drying, adding into a heating furnace, keeping the temperature at 170 ℃ for 30min in an oxygen atmosphere, and cooling to room temperature to obtain the activated zinc oxide.
Example 6
A preparation method of styrene-acrylic emulsion for a high-damping coating comprises the following steps:
s1, adding 20g of a reactive emulsifier UCAN-1 (allyloxy hydroxypropyl sodium sulfonate), 4.8g of sodium bicarbonate, 3g of active zinc oxide and 16g of an emulsifier FS-935 into 1171.77g of water, uniformly mixing, heating to 78 ℃, adding 120g of a first pre-emulsion and 23.2g of an ammonium persulfate aqueous solution with the mass fraction of 13.79%, and reacting for 30min;
s2, adjusting the temperature to 84 ℃, and respectively adding 688g of first pre-emulsion and 63.2g of aqueous solution of ammonium persulfate with the mass fraction of 5.06 percent, wherein the dropping speed of the first pre-emulsion is 12g/min, and the acceleration of the drop of the aqueous solution of ammonium persulfate with the mass fraction of 5.06 percent is 1g/min; preserving the heat for 30min;
maintaining the temperature at 84 ℃, respectively adding 1940g of a second pre-emulsion and 123.2g of an ammonium persulfate aqueous solution with the mass fraction of 2.60%, wherein the dropping speed of the second pre-emulsion is 16.2g/min, the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 2.60% is 1g/min, and the second pre-emulsion and a third initiator are dropped simultaneously; preserving the heat for 10min;
continuously maintaining the temperature at 84 ℃, adding 15g of ammonium persulfate aqueous solution with the mass fraction of 6.67 percent, wherein the acceleration of the ammonium persulfate aqueous solution with the mass fraction of 6.67 percent is 1g/min; preserving the heat for 120min;
and S3, cooling to 60 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, heating to 80 ℃, keeping the temperature for 1.5h, cooling to 42 ℃, and filtering by using a 300-mesh nylon bag.
The first pre-emulsion comprises: 320g of ethyl acrylate, 200g of butyl acrylate, 4368g of emulsifier CO and 280g of water.
The second pre-emulsion comprises: 600g of butyl acrylate, 120g of hydroxymethyl acrylamide with the solid content of 48%, 560g of styrene, 40g of hydroxyethyl acrylate, KH57032g of silane coupling agent, 4368g of emulsifier and 580g of water.
The active zinc oxide is prepared by the following specific steps: adding 2g of polyvinyl alcohol into 15g of deionized water, uniformly stirring, adding 0.5g of zinc acetate, stirring at 85 ℃ for 1.5h, adjusting the pH value of the system to 7.2-8, continuously stirring for 1.5h, filtering, drying, adding into a heating furnace, keeping the temperature at 160 ℃ for 15min in an oxygen atmosphere, and cooling to room temperature to obtain the activated zinc oxide.
Example 7
The water-based flame-retardant damping coating comprises the following components in parts by weight: 40 parts of styrene-acrylic emulsion for a high-damping coating with a core-shell structure, 25 parts of muscovite powder, 10 parts of aluminum hydroxide, 0.4 part of dispersant BYK-20150.4 part, 0.4 part of Digao 825 defoaming agent, 2.5 parts of AMP-95 multifunctional auxiliary agent, 121.2 parts of alcohol ester-121.2 parts, 1 part of VA-3 series acrylic thickening agent, 0.5 part of glass fiber and 19 parts of talcum powder.
The preparation method of the water-based flame-retardant damping paint comprises the following steps:
I. at normal temperature, the styrene-acrylic emulsion for the high-damping coating with the core-shell structure, which is obtained in the embodiment 3, is added into a 500mL plastic cup and stirred under a dispersion machine, wherein the dispersion speed is 500r/min;
II. Then adding glass fiber, dispersant BYK-2015 and DIHONG 825 defoaming agent in sequence, and stirring at the speed of 1000 r/min;
III, mixing 40-mesh, 100-mesh and 200-mesh muscovite powder according to the weight ratio of 1:2:1, adding the mixture into the mixed solution obtained in the step II after uniformly mixing, sequentially adding aluminum hydroxide and talcum powder, and stirring for 30min at a dispersion speed of 1500r/min;
IV, adding the multifunctional auxiliary agent of the alcohol ester-12 and the AMP-95 into the mixed liquid obtained in the step III, and stirring for 30min;
v, adding the VA-3 acrylic acid thickening agent into the mixed liquid obtained in the step IV, and stirring at the speed of 1000r/min for 20min to obtain the water-based flame-retardant damping paint.
When the water-based flame-retardant damping paint is used, the viscosity of the paint can be adjusted by using a proper amount of water so as to meet the construction requirements.
Example 8
The water-based flame-retardant damping coating comprises the following components in parts by weight: 45 parts of styrene-acrylic emulsion for a high-damping coating with a core-shell structure, 20 parts of muscovite powder, 13 parts of aluminum hydroxide, 0.3 part of dispersant BYK-20150.3 part, 0.3 part of Digao 825 defoaming agent, 2.7 parts of AMP-95 multifunctional auxiliary agent, 121.5 parts of alcohol ester-121.5 parts, 1.2 parts of VA-2 series acrylic thickening agent, 1 part of glass fiber and 15 parts of talcum powder.
The preparation method of the water-based flame-retardant damping paint comprises the following steps:
I. at normal temperature, the styrene-acrylic emulsion for the high-damping coating with the core-shell structure, which is obtained in the example 3, is added into a 500mL plastic cup and stirred under a dispersion machine, wherein the dispersion speed is 500r/min;
II. Sequentially adding glass fiber, a dispersant BYK-2015 and a Digao 825 defoaming agent into the aqueous emulsion obtained in the step I, and stirring at the speed of 1000 r/min;
III, mixing 40-mesh, 100-mesh and 200-mesh muscovite powder according to the weight ratio of 1:2:1, adding the mixture into the mixed solution obtained in the step II after uniformly mixing, sequentially adding aluminum hydroxide and talcum powder, and stirring for 50min at a dispersion speed of 1500r/min;
IV, adding the multifunctional auxiliary agent of alcohol ester-12 and AMP-95 into the mixed solution obtained in the step III, and stirring for 50min;
v, adding the VA-2 acrylic acid thickening agent into the mixed liquid obtained in the step IV, and stirring at the speed of 1000r/min for 30min to obtain the water-based flame-retardant damping paint.
When the water-based flame-retardant damping paint is used, the viscosity of the paint can be adjusted by using a proper amount of water so as to meet the construction requirements.
Example 9
The water-based flame-retardant damping coating comprises the following components in parts by weight: 50 parts of styrene-acrylic emulsion for a high-damping coating with a core-shell structure, 15 parts of muscovite powder, 10 parts of aluminum hydroxide, 0.5 part of dispersant BYK-20150.5 part, 0.5 part of Digao 825 defoaming agent, 3 parts of AMP-95 multifunctional auxiliary agent, 122 parts of alcohol ester, 1.5 parts of polyurethane thickener, 1.5 parts of glass fiber and 16 parts of talcum powder.
The preparation method of the water-based flame-retardant damping paint comprises the following steps:
I. at normal temperature, the styrene-acrylic emulsion for the high-damping coating with the core-shell structure, which is obtained in the embodiment 3, is added into a 500mL plastic cup and stirred under a dispersion machine, wherein the dispersion speed is 500r/min;
II. Sequentially adding glass fiber, a dispersant BYK-2015 and a DIHONG 825 defoaming agent into the aqueous emulsion obtained in the step I, and stirring at the speed of 1000 r/min;
III, mixing 40-mesh, 100-mesh and 200-mesh muscovite powder according to the weight ratio of 1:2:1, adding the mixture obtained in the step II into the mixed solution obtained in the step II after uniformly mixing, and then sequentially adding aluminum hydroxide and talcum powder and stirring for 40min, wherein the dispersion speed is 1500r/min;
IV, adding the multifunctional auxiliary agent of alcohol ester-12 and AMP-95 into the mixed solution obtained in the step III, and stirring for 40min;
v, adding a polyurethane thickener into the mixed solution obtained in the step IV, and stirring at the speed of 1000r/min for 25min to obtain the water-based flame-retardant damping paint.
When the water-based flame-retardant damping paint is used, the viscosity of the paint can be adjusted by using a proper amount of water so as to meet the construction requirements.
A paint film with a thickness of 40 μm was coated on a tinplate with a thickness of 50X 120X 0.3mm by a coating method in examples 7-9, the paint film was dried at room temperature for 7 days, and various properties of the paint film were measured according to the national standard method and compared with a commercially available paint, and the results are shown in Table 1:
TABLE 1 Performance index of aqueous flame retardant damping coating
The test results show that the flame retardant and damping material has excellent flame retardant and damping performance, high damping performance in a wide temperature range, and drying time, impact resistance, cohesiveness, cold and heat exchange resistance, heat resistance and flame retardance all meet the national standard requirements.
Example 10
The water-based flame-retardant damping coating comprises the following components in parts by weight: 45 parts of styrene-acrylic emulsion for a high-damping coating with a core-shell structure, 20 parts of muscovite powder, 13 parts of aluminum hydroxide, 0.3 part of dispersant BYK-20150.3 part, 0.3 part of Digao 825 defoaming agent, 2.7 parts of AMP-95 multifunctional auxiliary agent, 121.5 parts of alcohol ester-121.5 parts, 1.2 parts of VA-2 series acrylic thickening agent, 1 part of glass fiber and 15 parts of talcum powder.
The preparation method of the water-based flame-retardant damping paint comprises the following steps:
I. at normal temperature, the styrene-acrylic emulsion for the high-damping coating with the core-shell structure, which is obtained in the embodiment 8, is added into a 500mL plastic cup and stirred under a dispersion machine, and the dispersion speed is 500r/min;
II. Sequentially adding glass fiber, a dispersant BYK-2015 and a DIHONG 825 defoaming agent into the aqueous emulsion obtained in the step I, and stirring at the speed of 1000 r/min;
III, mixing 40-mesh, 100-mesh and 200-mesh white mica powder according to the weight ratio of 1:2:1, adding the mixture obtained in the step II into the mixed solution obtained in the step II after uniformly mixing, and then sequentially adding aluminum hydroxide and talcum powder and stirring for 50min, wherein the dispersion speed is 1500r/min;
IV, adding the multifunctional auxiliary agent of alcohol ester-12 and AMP-95 into the mixed solution obtained in the step III, and stirring for 50min;
v, adding the VA-2 acrylic acid thickening agent into the mixed liquid obtained in the step IV, and stirring at the speed of 1000r/min for 30min to obtain the water-based flame-retardant damping paint.
When the water-based flame-retardant damping paint is used, the viscosity of the paint can be adjusted by using a proper amount of water so as to meet the construction requirements.
The corrosion resistance test was carried out again in examples 6 and 10, and referring to GB/T9274-1988, the tinplate coated with the paint film of the test specimen was placed in a corresponding corrosive medium, and the surface of the test specimen was observed for the occurrence of bubbling, peeling or rusting, and if one group of the above phenomena occurs, the test specimen was terminated, and the time was recorded.
| Example 8 | Example 10 | |
| 10％HCl | 168h | ＞168h |
| 10％NaOH | 276h | ＞168h |
| 5％NaCl | 360h | ＞360h |
As can be seen from the above table: compared with the acid and alkali corrosion resistance of the embodiment 8, the embodiment 10 is superior.
The reason is that in the embodiment 10, the styrene-acrylic emulsion for the high-damping coating with the core-shell structure obtained in the embodiment 6 is adopted, the activated zinc oxide can be combined with the styrene-acrylic emulsion, the affinity of the activated zinc oxide and the styrene-acrylic emulsion is excellent, the activated zinc oxide can be uniformly coated on the surfaces of latex particles of the styrene-acrylic emulsion, and the activated zinc oxide and the styrene-acrylic emulsion are combined through electrostatic combination to form a product, so that not only are the medium molecules not easy to permeate and diffuse into the particles in an acid-base environment, but also the damage of the medium molecules to the inner latex particles is effectively avoided, and meanwhile, the zinc oxide uniformly coated on the surfaces of the medium molecules further effectively improves the corrosion resistance and stability of the system.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The preparation method of the styrene-acrylic emulsion for the high-damping coating is characterized by comprising the following steps of:
(1) Adding 15-25 parts by weight of allyloxy hydroxypropyl sodium sulfonate, 3.8-5.8 parts by weight of sodium bicarbonate and 12-20 parts by weight of first emulsifier into 1000-1200 parts by weight of water, uniformly mixing, adjusting the temperature to 70-90 ℃, adding 110-130 parts by weight of first pre-emulsion and 21.2-25.5 parts by weight of 12-15% of first initiator, and reacting for 20-40min;
(2) Adjusting the temperature to 80-90 ℃, respectively adding 676-700 parts of first pre-emulsion, 57.2-69.2 parts of second initiator with the mass fraction of 4-6%, preserving the heat for 20-40min, respectively adding 1900-1980 parts of second pre-emulsion, 113.2-133.2 parts of third initiator with the mass fraction of 3.1-5.1%, preserving the heat for 5-20min, adding 10-20 parts of fourth initiator with the mass fraction of 5.1-8.1%, preserving the heat for 100-150min;
(3) Cooling to 55-65 ℃, adding ammonia water to adjust the pH value of the system to 7.5-8, cooling to below 40-50 ℃, and filtering to obtain the styrene-acrylic emulsion for the high-damping coating.
2. The method for preparing the styrene-acrylic emulsion for the high-damping coating according to claim 1, wherein in the step (1) or the step (2), the first pre-emulsion comprises: ethyl acrylate, butyl acrylate, a second emulsifier and water; the mass ratio of the ethyl acrylate to the butyl acrylate to the second emulsifier to the water is 310-330:195-205:6-10:275-285.
3. The method for preparing the styrene-acrylic emulsion for the high-damping coating according to claim 1, wherein in the step (2), the second pre-emulsion comprises: butyl acrylate, hydroxymethyl acrylamide, styrene, hydroxyethyl acrylate, a silane coupling agent, a second emulsifier and water; the mass ratio of butyl acrylate, hydroxymethyl acrylamide, styrene, hydroxyethyl acrylate, a silane coupling agent, a second emulsifier to water is 590-610:55-60:550-570:35-45:30-34:6-10:575-585.
4. The method for preparing styrene-acrylic emulsion for high damping coating according to claim 1, wherein the step (1) further comprises: the active zinc oxide is added with sodium bicarbonate at the same time, and the mass ratio of the active zinc oxide to the sodium bicarbonate is (2-4): 3.8-5.8; the active zinc oxide is zinc oxide nano-particles loaded in a polyvinyl alcohol network mesh.
5. The method for preparing the styrene-acrylic emulsion for the high damping coating according to claim 1, wherein in the step (2), the dropping speed of the first pre-emulsion is 10 to 13g/min, and the dropping speed of the second initiator is 0.8 to 1.2g/min; the dropping speed of the second pre-emulsion is 14.2-18.2g/min, and the dropping speed of the third initiator is 0.8-1.2g/min; the dropping speed of the fourth initiator is 0.8-1.2g/min.
6. The preparation method of the styrene-acrylic emulsion for the high-damping coating according to claim 1, wherein the first initiator, the second initiator, the third initiator and the fourth initiator are persulfates, preferably ammonium persulfate; preferably, in step (2), the time taken for the second pre-emulsion and the third initiator to be added dropwise is the same.
7. The styrene-acrylic emulsion for the high-damping coating is characterized by being prepared by the preparation method of the styrene-acrylic emulsion for the high-damping coating according to any one of claims 1 to 6.
8. The water-based flame-retardant damping coating is characterized by comprising the following components in parts by weight: 30-60 parts of styrene-acrylic emulsion for high-damping coatings as claimed in claim 7, 10-30 parts of filler, 10-20 parts of flame retardant, 0.2-0.8 part of dispersant, 0.2-0.8 part of defoamer, 1-2 parts of film-forming assistant, 1-1.5 parts of thickener and 0.5-1.5 parts of short fiber.
9. The water-based flame-retardant damping paint as claimed in claim 8, wherein the filler is white mica powder or/and sericite powder; the fire retardant is at least one of vermiculite, hollow glass beads and aluminum hydroxide; the film-forming auxiliary agent is at least one of propylene glycol butyl ether, propylene glycol methyl ether acetate and alcohol ester-12; the thickener is acrylic thickener or/and polyurethane thickener.
10. A method for preparing the water-based flame-retardant damping paint as claimed in claim 8 or 9, which comprises the following steps:
(1) Continuously stirring the high-damping coating with the styrene-acrylic emulsion as claimed in claim 7, and then adding the dispersing agent, the defoaming agent and the short fibers to mix to obtain a premix;
(2) Uniformly premixing the filler and the flame retardant, adding the premixed material for dispersion, adding the film-forming assistant, and stirring to obtain a mixed solution system;
(3) And adding a thickening agent into the mixed solution system for dispersion to obtain the water-based flame-retardant damping paint.
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