CN116535927B - Coating for building and preparation method thereof - Google Patents
Coating for building and preparation method thereof Download PDFInfo
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- CN116535927B CN116535927B CN202310716871.2A CN202310716871A CN116535927B CN 116535927 B CN116535927 B CN 116535927B CN 202310716871 A CN202310716871 A CN 202310716871A CN 116535927 B CN116535927 B CN 116535927B
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- 238000000576 coating method Methods 0.000 title claims abstract description 59
- 239000011248 coating agent Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 239000000839 emulsion Substances 0.000 claims abstract description 151
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 113
- 239000011258 core-shell material Substances 0.000 claims abstract description 56
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910003023 Mg-Al Inorganic materials 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 23
- -1 dodecanol ester Chemical class 0.000 claims abstract description 15
- LQZZUXJYWNFBMV-UHFFFAOYSA-N ethyl butylhexanol Natural products CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000080 wetting agent Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 80
- 238000003756 stirring Methods 0.000 claims description 73
- 238000002156 mixing Methods 0.000 claims description 64
- 239000000243 solution Substances 0.000 claims description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 40
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 23
- 239000000084 colloidal system Substances 0.000 claims description 23
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 22
- MFUVDXOKPBAHMC-UHFFFAOYSA-N magnesium;dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MFUVDXOKPBAHMC-UHFFFAOYSA-N 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 239000012266 salt solution Substances 0.000 claims description 22
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 21
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 16
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 16
- 229940068918 polyethylene glycol 400 Drugs 0.000 claims description 14
- 239000013530 defoamer Substances 0.000 claims description 12
- GLISOBUNKGBQCL-UHFFFAOYSA-N 3-[ethoxy(dimethyl)silyl]propan-1-amine Chemical compound CCO[Si](C)(C)CCCN GLISOBUNKGBQCL-UHFFFAOYSA-N 0.000 claims description 11
- XNDZQQSKSQTQQD-UHFFFAOYSA-N 3-methylcyclohex-2-en-1-ol Chemical compound CC1=CC(O)CCC1 XNDZQQSKSQTQQD-UHFFFAOYSA-N 0.000 claims description 11
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 11
- 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 claims description 11
- JMGZBMRVDHKMKB-UHFFFAOYSA-L disodium;2-sulfobutanedioate Chemical compound [Na+].[Na+].OS(=O)(=O)C(C([O-])=O)CC([O-])=O JMGZBMRVDHKMKB-UHFFFAOYSA-L 0.000 claims description 11
- 229920000193 polymethacrylate Polymers 0.000 claims description 11
- 239000011734 sodium Substances 0.000 claims description 11
- 229910052708 sodium Inorganic materials 0.000 claims description 11
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 10
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 10
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000032683 aging Effects 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- MWMFMCTUGUZSJJ-UHFFFAOYSA-N 3-methyladamantan-1-amine Chemical compound C1C(C2)CC3CC1(C)CC2(N)C3 MWMFMCTUGUZSJJ-UHFFFAOYSA-N 0.000 claims description 5
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 3
- ITOMRKOKARKBEP-UHFFFAOYSA-N tris[[dimethyl-[3-(oxiran-2-ylmethoxy)propyl]silyl]oxy]-phenylsilane Chemical compound C1OC1COCCC[Si](C)(C)O[Si](C=1C=CC=CC=1)(O[Si](C)(C)CCCOCC1OC1)O[Si](C)(C)CCCOCC1CO1 ITOMRKOKARKBEP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 19
- 239000003973 paint Substances 0.000 abstract description 16
- 239000003063 flame retardant Substances 0.000 abstract description 10
- 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 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 239000011159 matrix material Substances 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 239000006087 Silane Coupling Agent Substances 0.000 abstract description 2
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 22
- 150000004692 metal hydroxides Chemical class 0.000 description 22
- 239000010410 layer Substances 0.000 description 21
- 239000000779 smoke Substances 0.000 description 15
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 11
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 10
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 10
- 238000009413 insulation Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 241001133760 Acoelorraphe Species 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 6
- 239000005909 Kieselgur Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 4
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 4
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 4
- 229910001701 hydrotalcite Inorganic materials 0.000 description 4
- 229960001545 hydrotalcite Drugs 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZPZDIFSPRVHGIF-UHFFFAOYSA-N 3-aminopropylsilicon Chemical compound NCCC[Si] ZPZDIFSPRVHGIF-UHFFFAOYSA-N 0.000 description 2
- FEIQOMCWGDNMHM-UHFFFAOYSA-N 5-phenylpenta-2,4-dienoic acid Chemical compound OC(=O)C=CC=CC1=CC=CC=C1 FEIQOMCWGDNMHM-UHFFFAOYSA-N 0.000 description 2
- 241000238367 Mya arenaria Species 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical group [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- RQNARBHBAKRUSJ-UHFFFAOYSA-N bis[[dimethyl-[3-(oxiran-2-ylmethoxy)propyl]silyl]oxy]-[3-(oxiran-2-ylmethoxy)propyl]-phenylsilane Chemical compound C1OC1COCCC[Si](C=1C=CC=CC=1)(O[Si](C)(C)CCCOCC1OC1)O[Si](C)(C)CCCOCC1CO1 RQNARBHBAKRUSJ-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012796 inorganic flame retardant Substances 0.000 description 2
- GRVDJDISBSALJP-UHFFFAOYSA-N methyloxidanyl Chemical group [O]C GRVDJDISBSALJP-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N Adamantane Natural products C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002562 thickening agent Substances 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
- 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
- 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
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
Abstract
The invention relates to the field of paint, and in particular discloses a building paint and a preparation method thereof, wherein the building paint comprises the following raw materials: modified core-shell styrene-acrylic emulsion, diatomite or functional modified diatomite, wetting agent, leveling agent, defoaming agent and dodecanol ester; the Mg-Al layered double hydroxide loaded on the shell of the modified core-shell styrene-acrylic emulsion is modified by a silane coupling agent and is matched with diatomite or functional modified diatomite, so that the core-shell styrene-acrylic emulsion matrix can be promoted to form carbon, a molten carbon layer is formed, the strength of the carbon layer is enhanced, and the aim of flame retardance is fulfilled. The building coating disclosed by the invention has excellent flame-retardant and fireproof effects and damping and sound-insulating effects.
Description
Technical Field
The invention relates to the field of coatings, in particular to a coating for building and a preparation method thereof.
Background
The damping paint for building is generally used for absorbing vibration energy through viscoelasticity of high molecular material and converting the vibration energy to realize vibration reduction and noise reduction, and the raw materials mainly comprise solvent, organic and inorganic fillers, and are widely applied to the fields of civil electrical appliances, engineering machinery and the like. However, most of the polymer materials are inflammable, have poor fireproof performance, generate a large amount of smoke during combustion, have flame propagation, and have certain potential safety hazards. Chinese patent CN105670406a discloses a preparation method of sound insulation styrene-acrylic emulsion based composite coating, comprising the following steps: soaking the palm leaves in water, taking out, soaking in a composite solution, taking out, soaking in a softener solution, and opening to obtain crude palm leaf fibers; adding the crude palm leaf fibers into a sodium hydroxide solution for heating, adding water for soaking after centrifugal dealkalization, and drying to obtain alkalized crude palm leaf fibers; grinding the alkalized palm leaf crude fibers, transferring into a micro-jet nano homogenizer for treatment, and drying to obtain the palm leaf fibers; the styrene-acrylic emulsion is added with the coupling agent and stirred uniformly, and the filler, the flame retardant, the palm fiber, the water, the film-forming auxiliary agent and the thickening agent are added and stirred uniformly and ground, so that the coating prepared by the invention is environment-friendly and harmless and has certain sound insulation performance, but the preparation method is complicated, the performance is limited, and further improvement and optimization are needed.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a coating for building and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
the building coating comprises the following raw materials in parts by mass:
80-85 parts of modified core-shell styrene-acrylic emulsion, 5-10 parts of diatomite or functional modified diatomite, 2-4 parts of wetting agent PE-100, 0.1-0.5 part of flatting agent, 0.1-0.5 part of defoamer NXZ and 5-6 parts of dodecanol ester.
Most of the coatings with damping function contain a large amount of organic high molecular polymers, which also causes that the damping coatings are easy to burn, the smoke density is high during burning, and once fire disasters occur, potential safety hazards are brought to lives and properties of people. Improving the burnable properties of damping coatings by adding flame retardants is a very effective way. However, the damping paint is effective in sound insulation because the transmission of sound waves is slowed down by the vibration of the organic high molecular polymer. Therefore, the inorganic flame retardant material has the problems of larger particle size, incompatibility, poor dispersibility and the like of the organic high molecular polymer, and the like, and the inorganic flame retardant material is added into the damping coating, so that the damping performance of the coating is reduced to a certain extent. Therefore, how to realize the improvement of the flame retardant property of the coating without affecting or even improving the damping property of the coating is a challenging research direction.
According to the invention, firstly, the acrylic acid monomer and the styrene are used as raw materials to synthesize the styrene-acrylic emulsion, and compared with pure acrylic acid, the styrene-acrylic emulsion has more excellent high temperature resistance and is easy to carbonize under the high temperature condition to form a compact carbon layer, so that the generation of smoke is reduced. However, the styrene-acrylic polymer has high molecular chain hardness and weak consumption ability for vibration waves. Therefore, the invention adopts butyl acrylate and isooctyl acrylate to polymerize, forms a layer of soft shell with more branched chains on the surface of the styrene-acrylic acid polymer, and finally obtains the organic high polymer emulsion which has better damping performance, is high temperature resistant, can form a compact carbon layer and reduces the generation of smoke.
The preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.3-0.6 part of sodium bicarbonate, 1.5-2 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 0.5-1.5 parts of methacrylic acid, 13-15 parts of butyl acrylate, 11-12 parts of styrene, 1-2 parts of methyl methacrylate and 19-21 parts of water according to parts by mass, and stirring for 20-40min at 300-400r/min to obtain a pre-emulsion; mixing 0.2-0.3 part of ammonium persulfate and 6-7 parts of water, and stirring at 300-400r/min for 10-20min to obtain ammonium persulfate solution; mixing 0.6-1 part of sodium polymethacrylate and 5-10 parts of water, and stirring for 10-20min at 300-400r/min to obtain a protective colloid solution; mixing 10-15 parts of pre-emulsion, 5-10 parts of protective colloid solution and 2-4 parts of ammonium persulfate solution, and stirring at 300-400r/min for 120-180min at 70-80 ℃ in nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 18-20 parts of butyl acrylate, 15-16 parts of isooctyl acrylate and 0.01-0.05 part of ammonium persulfate according to the weight parts, and stirring for 20-40min at 300-400r/min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the rate of 0.4-0.8mL/min at the temperature of 70-80 ℃ in a nitrogen atmosphere, and continuing to react for 120-180min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1-2 parts by mass of magnesium nitrate hexahydrate, 1-2 parts by mass of aluminum nitrate nonahydrate, 1-2 parts by mass of a regulating agent and 10-20 parts by mass of water, and stirring for 1-2 hours at 300-400r/min to obtain a metal salt solution; then, adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.1-0.2mol/L at the rate of 0.4-0.8mL/min, adjusting the pH value to 9-10, and aging for 10-20 hours at room temperature to obtain the Mg-Al layered double hydroxide loaded styrene-acrylic emulsion;
and (2) adding 1-2 parts by mass of (3-aminopropyl) dimethyl ethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step (N3), stirring at 300-400r/min in a nitrogen atmosphere, and carrying out ultrasonic treatment for 12-24 hours to obtain the modified core-shell styrene-acrylic emulsion.
The power of the ultrasonic wave in the step N4 is 50-70W, and the frequency is 70-90kHz.
The regulator is at least one of sodium dodecyl benzene sulfonate and polyethylene glycol 400; preferably, the regulator is prepared from sodium dodecyl benzene sulfonate and polyethylene glycol 400 according to the mass ratio of (1-2): (1-2) and mixing.
The flame retardant performance of the core-shell styrene-acrylic emulsion-based coating is improved compared with that of the pure acrylic emulsion-based coating, but the flame retardant performance is still not ideal based on the properties of the organic high molecular polymer. Therefore, the invention further adopts magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to prepare metal salt solution, the metal salt solution is added into the prepared core-shell type styrene-acrylic emulsion, metal ions are fully adsorbed on the shell of the styrene-acrylic emulsion, the metal ions are regulated and controlled by a regulator, and then the pH is regulated and controlled by dropwise adding alkali liquor to form the Mg-Al layered double metal hydroxide. The Mg-Al layered double hydroxide obtained in this way has good dispersibility in styrene-acrylic emulsion. In addition, the sodium dodecyl benzene sulfonate and the polyethylene glycol 400 serving as the regulating agent can promote the generation of Mg-Al layered double metal hydroxide on the styrene-acrylic emulsion shell, and experiments prove that the sodium dodecyl benzene sulfonate and the polyethylene glycol 400 can also promote the carbonization of the styrene-acrylic emulsion, thereby playing the roles of flame retardance and reducing the generation of smoke. In addition, the Mg-Al layered double metal hydroxide is a layered inorganic nano filler, and in the heating process, free water between layers is heated and decomposed firstly, and takes away part of heat, then the layered double metal hydroxide is heated, and the combined water between hydrotalcite laminates is removed, so that part of heat is taken away. In the subsequent combustion process, due to dehydration, interlayer bond energy is reduced, the laminated plate collapses, the lamellar structure is dissociated in the middle of the fireproof paint, at the moment, sodium dodecyl benzene sulfonate and polyethylene glycol 400 playing a role in regulation and control promote the matrix to form a molten carbonaceous layer, and the collapsed hydrotalcite lamellar structure is dissociated in the carbonaceous layer to strengthen the strength of the carbonaceous layer, thereby playing a role in isolating fire and heat, protecting the matrix, enabling the matrix not to be decomposed continuously and achieving the aim of flame retardance. In addition, the acting force between the Mg-Al layered double hydroxide layers is weak, and when vibration is transmitted, the Mg-Al layered double hydroxide can consume energy through plane sliding, so that the transmission of sound waves is weakened. Thus, the flame retardant property of the coating is greatly enhanced, and the damping property of the coating is also improved to a certain extent.
Still further, the invention treats the Mg-Al layered double metal hydroxide on the surface of the core-shell type styrene-acrylic emulsion by (3-aminopropyl) dimethylethoxysilane, grafts the aminopropyl silane on the surface of the Mg-Al layered double metal hydroxide by methoxyl hydrolysis, plays a role of connecting the core-shell type styrene-acrylic emulsion and the Mg-Al layered double metal hydroxide, and reduces the polymerization of the Mg-Al layered double metal hydroxide.
In order to adjust the consistency of the damping coating and further improve its flame resistance, the invention adds diatomaceous earth as a filler. Diatomite is siliceous rock and has chemical components of SiO 2 Mainly, siO can be used 2 ·nH 2 O represents that the alkalinity of the paint can be neutralized, and a silicon dioxide colloid is formed, and the structure is fine, loose, light and porous, and has certain sound insulation performance. The carbon-carbon composite material is used as a filler of a coating, and can be combined with a carbonaceous layer along with the combustion process to form a stable silicon-carbon structure, so that the ignition point of the carbon-carbon composite material is further improved, and the generation of smoke is reduced.
The leveling agent is at least one of carboxymethyl cellulose and hydroxyethyl cellulose; preferably, the leveling agent is hydroxyethyl cellulose.
Preferably, the preparation method of the functional modified diatomite comprises the following steps:
adding 20-30 parts of diatomite and 1-4 parts of tris (glycidoxypropyl dimethylsilyloxy) phenylsilane into 100-130 parts of acetone, uniformly mixing, stirring for 1-3 hours at 200-500r/min, filtering, washing and drying to obtain pretreated diatomite; adding 10-15 parts of pretreated diatomite into 70-100 parts of cyclohexane, performing ultrasonic dispersion for 10-30min, then adding 3-5 parts of 1-amino-3-methyladamantane, placing the mixture in a nitrogen atmosphere at 100-110 ℃ and stirring for 5-7h at 200-500r/min, filtering, washing and drying to obtain the functional modified diatomite.
Wherein the ultrasonic power is 50-70W and the frequency is 70-90kHz.
The invention further modifies the diatomite function, on one hand, is beneficial to improving the defect of poor compatibility of inorganic diatomite in the organic styrene-acrylic emulsion, so that the inorganic diatomite is better dispersed in a coating matrix and better plays roles of sound insulation and flame retardance; on the other hand, the adamantane alkyl structure with stable structure is connected to the surface of the diatomite, so that the stability of the coating can be effectively improved, and the comprehensive properties of the coating such as mechanics and the like can be improved.
The preparation method of the building coating comprises the following steps:
according to the mass parts, 80-85 parts of modified core-shell styrene-acrylic emulsion, 5-10 parts of diatomite or functional modified diatomite, 2-4 parts of wetting agent PE-100, 0.1-0.5 part of flatting agent, 0.1-0.5 part of defoamer NXZ and 5-6 parts of dodecanol ester are mixed, and stirred for 10-30min at the rotating speed of 300-400r/min, so that the building coating is obtained.
The invention has the beneficial effects that: the building coating disclosed by the invention has good flame retardance and fireproof performance and good damping and sound insulation performance. The modified core-shell styrene-acrylic emulsion prepared by taking styrene-acrylic polymer as a core and acrylic polymer as a shell is loaded with Mg-Al layered double metal hydroxide, modified by a silane coupling agent and then matched with diatomite or functional modified diatomite, so that the core-shell styrene-acrylic emulsion matrix can be promoted to form carbon, a molten carbonaceous layer is formed, the strength of the carbon layer is enhanced, and the fireproof and smoke-suppressing effects are enhanced.
Detailed Description
Diatomaceous earth, particle size: 325 mesh, lingshu county abundant mineral products processing factory.
Hydroxyethyl cellulose, viscosity 70mpa.s, south Beijing bermuda biotechnology limited.
Alkylphenol ether sulfosuccinate sodium sulfonate, cat: kns2022070495, yikang chemical (Hubei) Co., ltd.
Sodium polymethacrylate, cat No.: WD3013, hubei Wanzhen chemical Co., ltd.
Dodecanol ester, CAS number: 25265-77-4.
(3-aminopropyl) dimethylethoxysilane, CAS number: 18306-79-1.
Tris (glycidoxypropyl dimethylsiloxy) phenylsilane, CAS:90393-83-2.
1-amino-3-methyladamantane, CAS:78056-28-7.
Example 1
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of styrene-acrylic emulsion, 10 parts of diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and the mixture is stirred for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the styrene-acrylic emulsion comprises the following steps: mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution are mixed, and the mixture is placed at 75 ℃ and in a nitrogen atmosphere and stirred for 160min at 400r/min, so that the styrene-acrylic emulsion is obtained.
Example 2
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of core-shell styrene-acrylic emulsion, 10 parts of diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and stirring is carried out for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; and (2) dropwise adding the acrylic emulsion into the styrene-acrylic emulsion obtained in the step (N1) at the speed of 0.6mL/min at the temperature of 75 ℃ in a nitrogen atmosphere, and continuing to react for 160min after the dropwise adding is finished to obtain the core-shell styrene-acrylic emulsion.
Example 3
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of styrene-acrylic emulsion loaded by Mg-Al layered double hydroxide, 10 parts of diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and stirred for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the Mg-Al layered double hydroxide supported styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the speed of 0.6mL/min in a nitrogen atmosphere at the temperature of 75 ℃, and continuing to react for 160min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1.5 parts by mass of magnesium nitrate hexahydrate, 1.5 parts by mass of aluminum nitrate nonahydrate, 1 part by mass of regulator and 15 parts by mass of water, and stirring at 400r/min for 1.5 hours to obtain a metal salt solution; and then adding the metal salt solution into the core-shell styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.2mol/L at the rate of 0.06mL/min, adjusting the pH value to 10, and aging for 12 hours at room temperature to obtain the Mg-Al layered double hydroxide supported styrene-acrylic emulsion.
The regulator is prepared by mixing sodium dodecyl benzene sulfonate and polyethylene glycol 400 according to a mass ratio of 1:1.
Example 4
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of modified core-shell styrene-acrylic emulsion, 10 parts of diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and stirring is carried out for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the speed of 0.6mL/min in a nitrogen atmosphere at the temperature of 75 ℃, and continuing to react for 160min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1.5 parts by mass of magnesium nitrate hexahydrate, 1.5 parts by mass of aluminum nitrate nonahydrate, 1 part by mass of regulator and 15 parts by mass of water, and stirring at 400r/min for 1.5 hours to obtain a metal salt solution; then, adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.2mol/L at the rate of 0.06mL/min, adjusting the pH value to 10, and aging for 12 hours at room temperature to obtain the Mg-Al layered double metal hydroxide loaded styrene-acrylic emulsion;
and (2) adding 1.5 parts by mass of (3-aminopropyl) dimethylethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step (N3), stirring at 400r/min in a nitrogen atmosphere, and performing ultrasonic treatment for 12 hours to obtain the modified core-shell styrene-acrylic emulsion.
The power of the ultrasonic wave in the step N4 is 60W, and the frequency is 80kHz.
The regulator is prepared by mixing sodium dodecyl benzene sulfonate and polyethylene glycol 400 according to a mass ratio of 1:1.
Example 5
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of modified core-shell styrene-acrylic emulsion, 10 parts of diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and stirring is carried out for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the speed of 0.6mL/min in a nitrogen atmosphere at the temperature of 75 ℃, and continuing to react for 160min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1.5 parts by mass of magnesium nitrate hexahydrate, 1.5 parts by mass of aluminum nitrate nonahydrate, 1 part by mass of regulator and 15 parts by mass of water, and stirring at 400r/min for 1.5 hours to obtain a metal salt solution; then, adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.2mol/L at the rate of 0.06mL/min, adjusting the pH value to 10, and aging for 12 hours at room temperature to obtain the Mg-Al layered double metal hydroxide loaded styrene-acrylic emulsion;
and (2) adding 1.5 parts by mass of (3-aminopropyl) dimethylethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step (N3), stirring at 400r/min in a nitrogen atmosphere, and performing ultrasonic treatment for 12 hours to obtain the modified core-shell styrene-acrylic emulsion.
The power of the ultrasonic wave in the step N4 is 60W, and the frequency is 80kHz.
The regulator is sodium dodecyl benzene sulfonate.
Example 6
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of modified core-shell styrene-acrylic emulsion, 10 parts of diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and stirring is carried out for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the speed of 0.6mL/min in a nitrogen atmosphere at the temperature of 75 ℃, and continuing to react for 160min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1.5 parts by mass of magnesium nitrate hexahydrate, 1.5 parts by mass of aluminum nitrate nonahydrate, 1 part by mass of regulator and 15 parts by mass of water, and stirring at 400r/min for 1.5 hours to obtain a metal salt solution; then, adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.2mol/L at the rate of 0.06mL/min, adjusting the pH value to 10, and aging for 12 hours at room temperature to obtain the Mg-Al layered double metal hydroxide loaded styrene-acrylic emulsion;
and (2) adding 1.5 parts by mass of (3-aminopropyl) dimethylethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step (N3), stirring at 400r/min in a nitrogen atmosphere, and performing ultrasonic treatment for 12 hours to obtain the modified core-shell styrene-acrylic emulsion.
The power of the ultrasonic wave in the step N4 is 60W, and the frequency is 80kHz.
The regulator is polyethylene glycol 400.
Example 7
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of modified core-shell styrene-acrylic emulsion, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and the mixture is stirred for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the speed of 0.6mL/min in a nitrogen atmosphere at the temperature of 75 ℃, and continuing to react for 160min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1.5 parts by mass of magnesium nitrate hexahydrate, 1.5 parts by mass of aluminum nitrate nonahydrate, 1 part by mass of regulator and 15 parts by mass of water, and stirring at 400r/min for 1.5 hours to obtain a metal salt solution; then, adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.2mol/L at the rate of 0.06mL/min, adjusting the pH value to 10, and aging for 12 hours at room temperature to obtain the Mg-Al layered double metal hydroxide loaded styrene-acrylic emulsion;
and (2) adding 1.5 parts by mass of (3-aminopropyl) dimethylethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step (N3), stirring at 400r/min in a nitrogen atmosphere, and performing ultrasonic treatment for 12 hours to obtain the modified core-shell styrene-acrylic emulsion.
The power of the ultrasonic wave in the step N4 is 60W, and the frequency is 80kHz.
The regulator is formed by mixing sodium dodecyl benzene sulfonate and polyethylene glycol 400 according to the mass ratio of 1:1.
Example 8
A preparation method of a coating for a building comprises the following steps:
according to the mass parts, 85 parts of modified core-shell styrene-acrylic emulsion, 10 parts of functional modified diatomite, 3 parts of wetting agent PE-100, 0.4 part of flatting agent, 0.3 part of defoamer NXZ and 5 parts of dodecanol ester are mixed, and the mixture is stirred for 20 minutes at a rotating speed of 400r/min, so that the building coating is obtained.
The leveling agent is hydroxyethyl cellulose.
The preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 0.5 part of sodium bicarbonate, 1.8 parts of alkylphenol ether sulfosuccinate sodium sulfonate, 1 part of methacrylic acid, 14 parts of butyl acrylate, 11.6 parts of styrene, 1.4 parts of methyl methacrylate and 20 parts of water according to parts by mass, and stirring at 400r/min for 30min to obtain a pre-emulsion; mixing 0.2 part of ammonium persulfate and 6.5 parts of water, and stirring at 400r/min for 15min to obtain an ammonium persulfate solution; mixing 0.8 part of sodium polymethacrylate and 8 parts of water, and stirring at 400r/min for 15min to obtain a protective colloid solution; mixing 14 parts of pre-emulsion, 7 parts of protective colloid solution and 3 parts of ammonium persulfate solution, and stirring at 400r/min for 160min at 75 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 19 parts of butyl acrylate, 15.6 parts of isooctyl acrylate and 0.03 part of ammonium persulfate according to parts by weight, and stirring at 400r/min for 30min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at the speed of 0.6mL/min in a nitrogen atmosphere at the temperature of 75 ℃, and continuing to react for 160min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1.5 parts by mass of magnesium nitrate hexahydrate, 1.5 parts by mass of aluminum nitrate nonahydrate, 1 part by mass of regulator and 15 parts by mass of water, and stirring at 400r/min for 1.5 hours to obtain a metal salt solution; then, adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, dropwise adding a sodium hydroxide aqueous solution with the concentration of 0.2mol/L at the rate of 0.06mL/min, adjusting the pH value to 10, and aging for 12 hours at room temperature to obtain the Mg-Al layered double metal hydroxide loaded styrene-acrylic emulsion;
and (2) adding 1.5 parts by mass of (3-aminopropyl) dimethylethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step (N3), stirring at 400r/min in a nitrogen atmosphere, and performing ultrasonic treatment for 12 hours to obtain the modified core-shell styrene-acrylic emulsion.
The power of the ultrasonic wave in the step N4 is 60W, and the frequency is 80kHz.
The regulator is prepared by mixing sodium dodecyl benzene sulfonate and polyethylene glycol 400 according to a mass ratio of 1:1.
The preparation method of the functional modified diatomite comprises the following steps:
adding 25 parts of diatomite and 3 parts of tris (glycidoxypropyl dimethylsilyloxy) phenylsilane into 120 parts of acetone, uniformly mixing, stirring for 2.5 hours at 300r/min, filtering, washing and drying to obtain pretreated diatomite; adding 12 parts of pretreated diatomite into 80 parts of cyclohexane, performing ultrasonic dispersion for 20min, wherein the ultrasonic power is 60W, the frequency is 80kHz, then adding 4 parts of 1-amino-3-methyladamantane, placing the mixture in a nitrogen atmosphere at 105 ℃ and stirring at 300r/min for 5.5h, filtering, washing and drying to obtain the functional modified diatomite.
Example 8 architectural coatings have a limiting oxygen resistance (LOI) of 37.0% and a Smoke Density Rating (SDR) of 21.05%.
Test example 1
The smoke density level was determined with reference to GB/T8627-2007 method for smoke density test for combustion or decomposition of building materials.
Test instrument: NANJING Jiang Ning analytical instrument factory JCY-2 type building material smoke density NBS box.
Sample preparation: the architectural paint prepared in each example was poured into a form, naturally dried at room temperature for 48 hours, and then dried in an oven at 60℃for 24 hours to prepare a spline having dimensions of 2.5 cm. Times.2.5 cm. Times.0.6 cm.
Test conditions: the gas flow rate is 0.1MPa, the test temperature is room temperature, and the test time is 4min.
The limiting oxygen index was determined by reference to the room temperature experimental section in GB/T2406.1-2008 section 1 for determination of Combustion behavior by oxygen index method for plastics.
The model is that a critical oxygen index determinator of Tex detection instrument science and technology Co is adopted: TTech-GBT2406-1, sample size is: 12 cm. Times.1 cm. Times.0.4 cm.
Table 1: flame retardant capability test
As can be seen from Table 1, the architectural coating prepared in example 4 of the present invention had the best flame retardant properties with the greatest limiting oxygen resistance and the lowest smoke density rating, indicating the least flammable and least amount of smoke released by combustion. This is probably because the invention synthesizes styrene-acrylic emulsion with acrylic acid monomer and styrene as raw materials first, and compared with pure acrylic acid, it has more excellent high temperature resistance, and is easy to carbonize under high temperature condition to form compact carbon layer, thus reducing the generation of smoke. Then, magnesium nitrate hexahydrate and aluminum nitrate nonahydrate are adopted to prepare metal salt solution, the metal salt solution is added into the prepared core-shell type styrene-acrylic emulsion, metal ions are fully adsorbed on the shell of the styrene-acrylic emulsion, the metal ions are regulated and controlled by a regulator, and then the pH value is regulated and controlled by dropwise adding alkali solution to form the Mg-Al layered double metal hydroxide. The Mg-Al layered double hydroxide obtained in this way has good dispersibility in styrene-acrylic emulsion. In addition, the sodium dodecyl benzene sulfonate and the polyethylene glycol 400 used as the regulating agent not only can promote the generation of the Mg-Al layered double hydroxide on the styrene-acrylic emulsion shell, but also have the experiment that proves that the sodium dodecyl benzene sulfonate and the polyethylene glycol 400 can promote carbonization of the styrene-acrylic emulsion, thereby playing the roles of flame retardance and reducing smoke generation. In addition, the Mg-Al layered double metal hydroxide is a layered inorganic nano filler, and in the heating process, free water between layers is heated and decomposed firstly, and takes away part of heat, then the layered double metal hydroxide is heated, and the combined water between hydrotalcite laminates is removed, so that part of heat is taken away. In the subsequent combustion process, due to dehydration, interlayer bond energy is reduced, the laminated plate collapses, the lamellar structure is dissociated in the middle of the fireproof paint, at the moment, sodium dodecyl benzene sulfonate and polyethylene glycol 400 playing a role in regulation and control promote the matrix to form a molten carbonaceous layer, and the collapsed hydrotalcite lamellar structure is dissociated in the carbonaceous layer to strengthen the strength of the carbonaceous layer, thereby playing a role in isolating fire and heat, protecting the matrix, enabling the matrix not to be decomposed continuously and achieving the aim of flame retardance. Then, the invention treats the Mg-Al layered double metal hydroxide on the surface of the core-shell styrene-acrylic emulsion by (3-aminopropyl) dimethylethoxysilane, grafts the aminopropyl silane on the surface of the Mg-Al layered double metal hydroxide by methoxyl hydrolysis, plays a role of connecting the core-shell styrene-acrylic emulsion and the Mg-Al layered double metal hydroxide, and reduces the polymerization of the Mg-Al layered double metal hydroxide. Finally, the present invention adds diatomaceous earth thereto as a filler. Diatomite is siliceous rock and has chemical components of SiO 2 Mainly, siO can be used 2 ·nH 2 O represents that the alkalinity of the paint can be neutralized, and a silicon dioxide colloid is formed, and the structure is fine, loose, light and porous, and has certain sound insulation performance. The carbon-carbon composite material is used as a filler of a coating, and can be combined with a carbonaceous layer along with the combustion process to form a stable silicon-carbon structure, so that the ignition point of the carbon-carbon composite material is further improved, and the generation of smoke is reduced. The prepared building paint has high fireproof performance while maintaining excellent sound isolating performance, and solves the problem of inorganic fireproof stuffing affecting the sound isolating performance of the paint.
Test example 2
The architectural paint prepared in each example was poured into a form, naturally dried at room temperature for 48 hours, and then dried in an oven at 60℃for 24 hours to prepare a 20 mm. Times.6.50 mm. Times.1.50 mm spline.
Damping performance the architectural paint prepared by the detection embodiment of DMTAQ800 dynamic mechanical property instrument is set in the detection process: and selecting a stretching mode for carrying out, wherein the strain is conditioned to be 1% of strain, the test frequency is 1Hz, the temperature interval is-100-60 ℃ during the test, and the temperature raising speed is 3 ℃ per minute.
Table 2: DMA test data
The damping performance of the material is generally represented by a loss factor (Tan delta), and the larger the Tan delta value is, the better the damping performance of the material is indicated, and the stronger the corresponding capability of the material for absorbing and consuming sound vibration energy is; the material with Tandelta more than or equal to 0.3 is an effective damping material.
As can be seen from Table 2, the architectural coatings prepared in examples 1 to 7 of the present invention have a wide temperature range and exhibit good soundproof effects in a room temperature range. Wherein the maximum loss factor and the temperature range of the building coating prepared in the example 1 are obviously smaller than those of the building coating prepared in the example 2. This is because the styrene-acrylic polymer used in example 1 has a high molecular chain hardness and a weak consumption ability for vibration waves. In the embodiment 2, butyl acrylate and isooctyl acrylate are polymerized to form a layer of soft shell with more branched chains on the surface of the styrene-acrylic acid polymer, so that the capability of consuming vibration waves is obviously improved. Example 3A layer of Mg-Al layered double hydroxide is generated on the surface of the prepared core-shell styrene-acrylic emulsion, so that the coating has excellent flame retardance and further improves the damping performance. The invention supposedly adopts magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to prepare metal salt solution, and the metal salt solution is added into the prepared core-shell type styrene-acrylic emulsion to enable metal ions to be fully adsorbed on the shell of the styrene-acrylic emulsion, the metal ions are regulated and controlled by a regulator, and then the pH is regulated and controlled by dropwise adding alkali solution to form the Mg-Al layered double metal hydroxide. The Mg-Al layered double hydroxide obtained in this way has good dispersibility in styrene-acrylic emulsion. In addition, the acting force between the Mg-Al layered double hydroxide layers is weak, and when vibration is transmitted, the Mg-Al layered double hydroxide can consume energy through plane sliding, so that the transmission of sound waves is weakened. Furthermore, sodium dodecyl benzene sulfonate used as a regulator may displace nitrate ions between mg—al layered double hydroxide layers to some extent, so that interlayer spacing thereof is enlarged, sliding occurs more easily, and thus acoustic waves are converted into mechanical energy. Example 5 the damping properties of sodium dodecylbenzenesulfonate alone, as a modulator, are very similar to those of example 4, to a certain extent corroborating the above. Example 7 did not add diatomaceous earth to the architectural coating, and its maximum loss factor increased, but the temperature range was narrowed. This demonstrates that diatomaceous earth itself has sound-insulating properties that can block the propagation of sound waves to some extent, which is advantageous for widening the temperature range of the paint, but itself is not easily converted into mechanical energy, which also blocks the paint's ability to consume sound waves to some extent. In conclusion, the flame retardant modification of the coating disclosed by the invention has no influence on the sound insulation performance, and the sound insulation performance of the coating is improved to a certain extent.
Claims (4)
1. The coating for the building is characterized by comprising the following raw materials in parts by mass: 80-85 parts of modified core-shell styrene-acrylic emulsion, 5-10 parts of functional modified diatomite, 2-4 parts of wetting agent, 0.1-0.5 part of flatting agent, 0.1-0.5 part of defoamer and 5-6 parts of dodecanol ester;
the preparation method of the modified core-shell styrene-acrylic emulsion comprises the following steps:
mixing 10-15 parts of pre-emulsion, 5-10 parts of protective colloid solution and 2-4 parts of ammonium persulfate solution according to parts by weight, and stirring for 120-180min at 70-80 ℃ in a nitrogen atmosphere to obtain styrene-acrylic emulsion;
mixing 18-20 parts of butyl acrylate, 15-16 parts of isooctyl acrylate and 0.01-0.05 part of ammonium persulfate according to the parts by weight, and stirring for 20-40min to obtain an acrylic emulsion; dropwise adding acrylic emulsion into the styrene-acrylic emulsion obtained in the step N1 at 70-80 ℃ in a nitrogen atmosphere, and continuing to react for 120-180min after the dropwise adding is completed to obtain core-shell styrene-acrylic emulsion;
mixing 1-2 parts by mass of magnesium nitrate hexahydrate, 1-2 parts by mass of aluminum nitrate nonahydrate, 1-2 parts by mass of a regulating agent and 10-20 parts by mass of water, and stirring for 1-2 hours to obtain a metal salt solution; adding the metal salt solution into the core-shell type styrene-acrylic emulsion prepared in the step N2, then dropwise adding a sodium hydroxide aqueous solution to adjust the pH to 9-10, and aging for 10-20 hours at room temperature to obtain a Mg-Al layered double hydroxide loaded styrene-acrylic emulsion;
adding 1-2 parts by mass of (3-aminopropyl) dimethylethoxysilane into the Mg-Al layered double hydroxide supported styrene-acrylic emulsion prepared in the step N3, stirring in a nitrogen atmosphere, and performing ultrasonic treatment for 12-24 hours to obtain the modified core-shell styrene-acrylic emulsion;
the regulator is at least one of sodium dodecyl benzene sulfonate and polyethylene glycol 400;
the preparation method of the pre-emulsion comprises the following steps: mixing 0.3-0.6 part of sodium bicarbonate, 1.5-2 parts of alkylphenol ether sulfosuccinate sodium salt, 0.5-1.5 parts of methacrylic acid, 13-15 parts of butyl acrylate, 11-12 parts of styrene, 1-2 parts of methyl methacrylate and 19-21 parts of water according to parts by mass, and stirring for 20-40min to obtain the pre-emulsion.
2. The architectural coating according to claim 1, wherein the method for preparing the functionally modified diatomaceous earth comprises the steps of:
adding 20-30 parts of diatomite and 1-4 parts of tris (glycidoxypropyl dimethylsilyloxy) phenylsilane into 100-130 parts of acetone, uniformly mixing, stirring for 1-3 hours, filtering, washing and drying to obtain pretreated diatomite; adding 10-15 parts of pretreated diatomite into 70-100 parts of cyclohexane, performing ultrasonic dispersion for 10-30min, then adding 3-5 parts of 1-amino-3-methyladamantane, placing the mixture in a nitrogen atmosphere at 100-110 ℃ and stirring for 5-7h, filtering, washing and drying to obtain the functional modified diatomite.
3. The architectural coating according to claim 1, wherein the ammonium persulfate solution is prepared by a process comprising: mixing 0.2-0.3 part of ammonium persulfate and 6-7 parts of water according to parts by mass, and stirring for 10-20min to obtain an ammonium persulfate solution; the preparation method of the protective colloid solution comprises the following steps: mixing 0.6-1 part of sodium polymethacrylate and 5-10 parts of water according to parts by mass, and stirring for 10-20min to obtain a protective colloid solution.
4. A method of preparing a coating for construction according to any one of claims 1 to 3, comprising the steps of: according to the mass parts, 80-85 parts of modified core-shell styrene-acrylic emulsion, 5-10 parts of functional modified diatomite, 2-4 parts of wetting agent, 0.1-0.5 part of flatting agent, 0.1-0.5 part of defoamer and 5-6 parts of dodecanol ester are mixed, and the mixture is stirred for 10-30min at the rotating speed of 300-400r/min, so that the coating for the building is obtained.
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| CN103333366A (en) * | 2013-06-24 | 2013-10-02 | 西南科技大学 | Layered double metal hydroxide based antiflaming smoke suppressant, preparation method thereof and antiflaming smoke suppressing compound material modified by using antiflaming smoke suppressant |
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