CN116396652B - Building waterproof coating composition and preparation method thereof - Google Patents
Building waterproof coating composition and preparation method thereof Download PDFInfo
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- CN116396652B CN116396652B CN202310660514.9A CN202310660514A CN116396652B CN 116396652 B CN116396652 B CN 116396652B CN 202310660514 A CN202310660514 A CN 202310660514A CN 116396652 B CN116396652 B CN 116396652B
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- acrylic emulsion
- aqueous acrylic
- mixed monomer
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- waterproof coating
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- 239000008199 coating composition Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000000839 emulsion Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 239000008367 deionised water Substances 0.000 claims abstract description 18
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 150000001875 compounds Chemical class 0.000 claims abstract description 14
- 239000003365 glass fiber Substances 0.000 claims abstract description 13
- 239000010445 mica Substances 0.000 claims abstract description 13
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims abstract description 10
- 239000013530 defoamer Substances 0.000 claims abstract 2
- 239000000178 monomer Substances 0.000 claims description 30
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 17
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 14
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 14
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 14
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 12
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 239000003999 initiator Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 7
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 claims description 3
- SWRGUMCEJHQWEE-UHFFFAOYSA-N ethanedihydrazide Chemical compound NNC(=O)C(=O)NN SWRGUMCEJHQWEE-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- PFIOPNYSBSJFJJ-UHFFFAOYSA-M sodium;2-octylbenzenesulfonate Chemical compound [Na+].CCCCCCCCC1=CC=CC=C1S([O-])(=O)=O PFIOPNYSBSJFJJ-UHFFFAOYSA-M 0.000 claims description 2
- 238000005406 washing Methods 0.000 abstract description 30
- 238000010276 construction Methods 0.000 abstract description 10
- 239000000945 filler Substances 0.000 abstract description 7
- 239000003431 cross linking reagent Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 description 37
- 238000005187 foaming Methods 0.000 description 30
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 18
- 239000003973 paint Substances 0.000 description 18
- 230000005587 bubbling Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 238000009472 formulation Methods 0.000 description 7
- 238000004925 denaturation Methods 0.000 description 6
- 230000036425 denaturation Effects 0.000 description 6
- 238000005201 scrubbing Methods 0.000 description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical group [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229940125904 compound 1 Drugs 0.000 description 3
- 229940125782 compound 2 Drugs 0.000 description 3
- 229940126214 compound 3 Drugs 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000011414 polymer cement Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 241000870659 Crassula perfoliata var. minor Species 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- REAYFGLASQTHKB-UHFFFAOYSA-N [2-[3-(1H-pyrazol-4-yl)phenoxy]-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound N1N=CC(=C1)C=1C=C(OC2=NC(=CC(=C2)CN)C(F)(F)F)C=CC=1 REAYFGLASQTHKB-UHFFFAOYSA-N 0.000 description 1
- SAHIZENKTPRYSN-UHFFFAOYSA-N [2-[3-(phenoxymethyl)phenoxy]-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound O(C1=CC=CC=C1)CC=1C=C(OC2=NC(=CC(=C2)CN)C(F)(F)F)C=CC=1 SAHIZENKTPRYSN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
- C09D133/12—Homopolymers or copolymers of methyl methacrylate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a building waterproof coating composition and a preparation method thereof, and belongs to the technical field of coatings. The building waterproof coating composition is prepared from the following raw materials in percentage by weight: 45-50% of aqueous acrylic emulsion, 4-10% of hydrazide compound, 17.5-20% of mica powder, 10-12.5% of shell powder, 2.5-5% of glass fiber, 1-2% of dispersing agent, 0.1-0.5% of thickener, 0.1-0.5% of defoamer and the balance of deionized water. The invention prepares the single-component building waterproof coating by taking the aqueous acrylic emulsion and the filler as main raw materials and the hydrazide compound as the cross-linking agent, and has convenient construction; the invention can form a coating with excellent water resistance, temperature resistance and washing resistance on the outer wall of a building by regulating the proportion of each component.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a building waterproof coating composition and a preparation method thereof.
Background
The building paint (paint for building) is one that is coated on building surface, can adhere well to building material and form complete protecting film. The existing building waterproof paint mainly comprises polyurethane waterproof paint, polymer cement-based waterproof paint, polymer emulsion waterproof paint and the like.
The polyurethane waterproof paint is prepared by taking isocyanate, polyether and the like as main raw materials and adding various auxiliary agents (such as a catalyst, an organic solvent and the like); the waterproof paint has poor adhesion performance with a base material and is not easy to construct; and volatile organic solvents (such as benzene solvents with toxicity) can be released during the construction process, so that pollution is caused. The polymer cement-based waterproof paint is prepared by taking high molecular polymer emulsion as a main raw material, such as polyacrylate, polyvinyl acetate and styrene-butadiene rubber emulsion, and adding various additives; although the waterproof paint can achieve better waterproof effect, the waterproof paint needs to strictly control the proportion of liquid components and powder components during construction, and also needs to be stirred on site, so that the construction is inconvenient, and bubbles are easily introduced in the stirring process on site to influence the performance of the paint. The polymer emulsion waterproof paint is a single-component paint prepared from high polymer emulsion and auxiliary agents, the single-component paint does not need on-site stirring operation, the construction is convenient, and the single-component paint is a focus of research in the field of the existing building waterproof paint. However, the water resistance, temperature denaturation resistance and wash resistance of such waterproof coatings are to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a building waterproof coating composition and a preparation method thereof.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a construction waterproof coating composition comprising the following components in weight percent: 40-60% of aqueous acrylic emulsion, 4-10% of hydrazide compound, 21-38% of filler, 1-2% of dispersing agent, 0.1-0.5% of thickening agent, 0.1-0.5% of defoaming agent and the balance of deionized water.
The invention prepares the single-component building waterproof coating by taking the aqueous acrylic emulsion and the filler as main raw materials and the hydrazide compound as the cross-linking agent, and has convenient construction; the prepared coating composition can form a coating with excellent water resistance, temperature resistance denaturation and washing resistance on the outer wall of a building by regulating the proportion of each component.
According to the research, the ratio of the hydrazide compound in the composition is controlled to be 4-10%, and the building waterproof coating composition disclosed by the invention can be stored for a long time and is stored for 30 days in an environment of 50 ℃ and does not generate phenomena such as turbidity and layering. If the hydrazide compound is present in the composition at too high a ratio, the storability of the coating composition may be adversely affected.
As a preferred embodiment of the present invention, the architectural waterproof coating composition comprises the following components in weight percent: 45-50% of aqueous acrylic emulsion, 4-10% of hydrazide compound, 32.5-35% of filler, 1-2% of dispersing agent, 0.1-0.5% of thickening agent, 0.1-0.5% of defoaming agent and the balance of deionized water. It has been found that the composition of the building waterproof coating has better comprehensive properties when the components meet the conditions.
As a preferred embodiment of the present invention, the filler includes at least one of mica powder, shell powder and glass fiber.
Further, the filler comprises 15-25% by weight of mica powder, 5-15% by weight of shell powder and 1-5% by weight of glass fiber in the building waterproof coating composition.
Further, in the building waterproof coating composition, the weight percentage of mica powder is 17.5-20%, the weight percentage of shell powder is 10-12.5%, and the weight percentage of glass fiber is 2.5-5%. According to the research, when the proportion of the mica powder, the shell powder and the glass fiber in the coating composition meets the conditions, the addition of the mica powder, the shell powder and the glass fiber can effectively reduce the internal stress of the coating composition, so that the internal stress distribution of the coating is more uniform, the flexibility of the coating is improved, and the temperature change resistance and the washing resistance of the coating are improved.
As a preferred embodiment of the present invention, the hydrazide compound is any one of butyric dihydrazide, oxalic dihydrazide and adipic dihydrazide.
As a preferred embodiment of the present invention, the aqueous acrylic emulsion comprises the following components in weight percent: 1-5% of an emulsifier, 26-35% of a first mixed monomer, 18-25% of a second mixed monomer, 5-15% of an initiator, 1-5% of a neutralizer and the balance of deionized water; the first mixed monomer comprises the following components in percentage by weight: 14-25% of methyl methacrylate, 42-67% of ethyl acrylate, 5-10% of N-butyl methacrylate, 10-15% of acrylic acid and 4-8% of N, N-methylene bisacrylamide; the second mixed monomer comprises the following components in percentage by weight: 46-66% of methyl methacrylate, 5-12% of ethyl acrylate, 15-24% of n-butyl methacrylate and 14-18% of styrene.
Further, the aqueous acrylic emulsion comprises the following components in percentage by weight: 3% of an emulsifier, 28-30% of a first mixed monomer, 20-24% of a second mixed monomer, 10% of an initiator, 2% of a neutralizer and the balance of deionized water; the first mixed monomer comprises the following components in percentage by weight: 16-22% of methyl methacrylate, 50-58% of ethyl acrylate, 7-9% of N-butyl methacrylate, 12-14% of acrylic acid and 5-6% of N, N-methylene bisacrylamide; the second mixed monomer comprises the following components in percentage by weight: 54-62% of methyl methacrylate, 6-9% of ethyl acrylate, 18-21% of n-butyl methacrylate and 14-16% of styrene.
Further, the initiator is ammonium persulfate solution, and the mass fraction of ammonium persulfate in the ammonium persulfate solution is 10%.
Further, the neutralizer is ammonia water, and the mass fraction of the ammonia water is 25-28%.
Further, the emulsifier comprises at least one of sodium dodecyl sulfate, octanol polyoxyethylene ether and sodium octyl benzene sulfonate.
As a preferred embodiment of the present invention, the method for preparing the aqueous acrylic emulsion comprises the steps of:
mixing methyl methacrylate, ethyl acrylate, N-butyl methacrylate, acrylic acid and N, N-methylene bisacrylamide to obtain a first mixed monomer; mixing methyl methacrylate, ethyl acrylate, n-butyl methacrylate and styrene to obtain a second mixed monomer; mixing an emulsifier and deionized water, heating, and simultaneously dripping the first mixed monomer and an initiator accounting for 50% of the total volume into a reaction kettle at a constant speed; then, the second mixed monomer and the rest initiator are simultaneously dripped into a reaction kettle at a constant speed; and after the dripping is finished, continuing to keep the temperature and stir for 1-3 hours, cooling to room temperature, adding a neutralizing agent and uniformly mixing to obtain the aqueous acrylic emulsion.
In a second aspect, the present invention provides a method for preparing the building waterproof paint according to the first aspect, comprising the following steps:
mixing the aqueous acrylic emulsion with deionized water, sequentially adding a hydrazide compound, a dispersing agent, a thickening agent and a defoaming agent, mixing, adding mica powder, shell powder and glass fiber, and mixing to obtain the building waterproof coating.
Compared with the prior art, the invention has the beneficial effects that:
the invention prepares the single-component building waterproof coating by taking the aqueous acrylic emulsion and the filler as main raw materials and the hydrazide compound as the cross-linking agent, and has convenient construction;
the invention can form a coating with excellent water resistance, temperature resistance and washing resistance on the outer wall of a building by regulating the proportion of each component.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
The materials used in the examples and comparative examples are as follows:
the preparation method of the acrylic emulsion 1-6 comprises the following steps: mixing methyl methacrylate, ethyl acrylate, N-butyl methacrylate, acrylic acid and N, N-methylene bisacrylamide to obtain a first mixed monomer; mixing methyl methacrylate, ethyl acrylate, n-butyl methacrylate and styrene to obtain a second mixed monomer; dissolving ammonium persulfate in deionized water to prepare ammonium persulfate solution; adding sodium dodecyl sulfate and deionized water into a reaction kettle with a stirrer and a heater, starting stirring and heating, and simultaneously and uniformly dropwise adding a first mixed monomer and ammonium persulfate solution with the total volume of 50% into the reaction kettle after heating to 85 ℃ for 2 hours; then, the second mixed monomer and the rest ammonium persulfate solution are simultaneously added into a reaction kettle at a constant speed for 2 hours; after the dripping is finished, the mixture is continuously stirred for 1h under heat preservation, cooled to room temperature (25 ℃), and ammonia water is added for uniform mixing, thus obtaining the aqueous acrylic emulsion.
The raw material formulations of the aqueous acrylic emulsions 1 to 6 are shown in table 1 below.
TABLE 1
| Raw materials (weight percent,%) | Aqueous acrylic emulsion 1 | Aqueous acrylic emulsion 2 | Aqueous acrylic emulsion 3 | Aqueous acrylic emulsion 4 | Aqueous acrylic emulsion 5 | Aqueous acrylic emulsion 6 |
| First mixed monomer | 28 | 35 | 26 | 30 | 30 | 30 |
| Second mixed monomer | 24 | 18 | 25 | 20 | 22 | 22 |
| Ammonium persulfate solution | 10 | 10 | 10 | 10 | 10 | 10 |
| Sodium dodecyl sulfate | 3 | 3 | 3 | 3 | 3 | 3 |
| Ammonia water | 2 | 2 | 2 | 2 | 2 | 2 |
| Water and its preparation method | 33 | 32 | 34 | 35 | 33 | 33 |
In the table, the mass concentration of ammonium persulfate in the ammonium persulfate solution is 10%, and the mass concentration of ammonia water is 25-28%.
The raw material formulation of the first mixed monomer in the aqueous acrylic emulsion 1 to 6 is shown in the following table 2.
TABLE 2
| Raw materials of the first Mixed monomer (weight percent,%) | Aqueous acrylic emulsion 1 | Aqueous acrylic emulsion 2 | Aqueous acrylic emulsion 3 | Aqueous acrylic emulsion 4 | Aqueous acrylic emulsion 5 | Aqueous acrylic emulsion 6 |
| Methyl methacrylate | 21 | 14 | 25 | 18 | 16 | 22 |
| Acrylic acid ethyl ester | 55 | 67 | 42 | 56 | 58 | 50 |
| N-butyl methacrylate | 7 | 5 | 10 | 9 | 8 | 8 |
| Acrylic acid | 12 | 10 | 15 | 12 | 12 | 14 |
| N, N-methylenebisacrylamide | 5 | 4 | 8 | 5 | 6 | 6 |
The raw material formulation of the second mixed monomer in the aqueous acrylic emulsion 1 to 6 is shown in the following table 3.
TABLE 3 Table 3
| Raw materials of the second mixed monomer (weight percent,%) | Aqueous acrylic emulsion 1 | Aqueous acrylic emulsion 2 | Aqueous acrylic acidEmulsion 3 | Aqueous acrylic emulsion 4 | Aqueous acrylic emulsion 5 | Aqueous acrylic emulsion 6 |
| Methyl methacrylate | 54 | 46 | 66 | 60 | 62 | 56 |
| Acrylic acid ethyl ester | 9 | 12 | 5 | 7 | 6 | 8 |
| N-butyl methacrylate | 21 | 24 | 15 | 18 | 18 | 20 |
| Styrene | 16 | 18 | 14 | 15 | 14 | 16 |
Hydrazide compound 1: adipic acid dihydrazide;
hydrazide compound 2: oxalic acid dihydrazide;
hydrazide compound 3: butyric dihydrazide;
mica powder: model BZ-1508;
shell powder: the specification is 800 meshes;
glass fiber: model 584;
dispersing agent: sodium hexametaphosphate;
and (3) a thickening agent: hydroxyethyl cellulose ether;
defoaming agent: the model is BYK-024.
The raw materials in the present invention are commercially available unless otherwise specified.
Examples 1 to 17
Examples of the building waterproof coating composition of the invention, the formulation of the building waterproof coating composition of the examples is shown in table 1, and the preparation method is as follows:
stirring the aqueous acrylic emulsion and deionized water for 10min at a rotating speed of 1000r/min, sequentially adding a hydrazide compound, a dispersing agent, a thickening agent and a defoaming agent under the condition that the rotating speed is 1500r/min, and continuously stirring for 10min after adding; and adding mica powder, shell powder and glass fiber, and stirring at a rotating speed of 2000r/min for 20min to obtain the building waterproof coating.
Comparative examples 1 to 3
The formulations of comparative examples 1 to 3 are shown in Table 4, and the preparation method is the same as that of example 1.
TABLE 4 Table 4
| Raw materials (weight percent,%) | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 |
| Aqueous acrylic emulsion 1 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | |||
| Aqueous acrylic emulsion 2 | 45 | |||||||||
| Aqueous acrylic emulsion 3 | 45 | |||||||||
| Aqueous acrylic emulsion 4 | 45 | |||||||||
| Aqueous acrylic emulsion 5 | ||||||||||
| Aqueous acrylic emulsion 6 | ||||||||||
| Hydrazide compound 1 | 4 | 6 | 8 | 10 | 6 | 6 | 6 | 6 | 6 | 6 |
| Hydrazide compound 2 | ||||||||||
| Hydrazide compound 3 | ||||||||||
| Mica powder | 20 | 20 | 20 | 20 | 17.5 | 15 | 25 | 20 | 20 | 20 |
| Shell powder | 10 | 10 | 10 | 10 | 12.5 | 15 | 5 | 10 | 10 | 10 |
| Glass fiber | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Dispersing agent | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Thickening agent | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Defoaming agent | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Deionized water | 13.5 | 11.5 | 9.5 | 7.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 |
| Raw materials (weight percent,%) | Example 11 | Example 12 | Example 13 | Example 14 | Example 15 | Example 16 | Example 17 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Aqueous acrylic emulsion 1 | 45 | 45 | 40 | 50 | 60 | 45 | 45 | 45 | ||
| Aqueous acrylic emulsion 2 | ||||||||||
| Aqueous acrylic emulsion 3 | ||||||||||
| Aqueous acrylic emulsion 4 | ||||||||||
| Aqueous acrylic emulsion 5 | 45 | |||||||||
| Aqueous acrylic emulsion 6 | 45 | |||||||||
| Hydrazide compound 1 | 6 | 6 | 4 | 6 | 10 | 6 | 6 | 6 | ||
| Hydrazide compound 2 | 6 | |||||||||
| Hydrazide compound 3 | 6 | |||||||||
| Mica powder | 20 | 20 | 20 | 20 | 30 | 20 | 15 | 35 | ||
| Shell powder | 10 | 10 | 10 | 10 | 3 | 10 | 5 | 35 | ||
| Glass fiber | 5 | 5 | 5 | 5 | 5 | 2.5 | 1 | 35 | ||
| Dispersing agent | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 |
| Thickening agent | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.2 | 0.5 | 0.2 | 0.2 | 0.2 |
| Defoaming agent | 0.3 | 0.3 | 0.3 | 0.3 | 0.1 | 0.3 | 0.5 | 0.3 | 0.3 | 0.3 |
| Deionized water | 11.5 | 11.5 | 11.5 | 11.5 | 16.8 | 9 | 6 | 11.5 | 11.5 | 11.5 |
Comparative example 4
This comparative example provides a construction waterproofing coating composition which differs from example 1 only in that the formulation of this comparative example has a hydrazide compound 1 of 2% by weight and deionized water of 15.5% by weight.
Comparative example 5
This comparative example provides a construction waterproofing coating composition which differs from example 1 only in that the formulation of this comparative example has a hydrazide compound 1 of 12% by weight and deionized water of 5.5% by weight.
Effect example 1
The coating compositions obtained in examples 1 to 17 and comparative examples 1 to 5 were tested as follows:
(1) Storage stability: the coating composition is put into a transparent glass bottle, sealed and then placed into a drying oven at 50 ℃, and after being stored for 30 days, the appearance change is observed;
(2) Water resistance: according to the specification of the standard GB/T9755-2014, taking a cement flat plate without asbestos as a substrate, brushing two coating compositions on the substrate, wherein the first coating composition is 120 mu m, the second coating composition is 80 mu m, baking for 2 hours at 80 ℃ to form a coating, soaking water, and observing whether the coating has the phenomena of foaming, falling and cracking;
(3) Temperature resistance denaturation: according to the specification of the standard GB/T9755-2014, taking a cement flat plate without asbestos as a substrate, brushing two coating compositions on the substrate, wherein the first coating composition is 120 mu m, and the second coating composition is 80 mu m and baked for 2 hours at 80 ℃ to form a coating; soaking in water at 23+ -2deg.C for 18 hr, freezing at-20+ -2deg.C for 3 hr, and oven drying at 50+ -2deg.C for 3 hr; repeating the soaking-freezing-hot drying process for 3 times, and observing whether the coating has the phenomena of foaming, falling, cracking and the like;
(4) Resistance to washing: according to the specification of the standard GB/T9755-2014, a PVC plastic sheet is used as a substrate, a gap wet film preparation machine with the specification of 200 mu m is used for knife coating, and the coating is formed by baking for 2 hours at 80 ℃; taking an n-dodecyl benzene sulfonate aqueous solution with the concentration of 2.5g/L as a scrubbing medium, uniformly coating the scrubbing medium on the coating by using a paint brush before testing, repeatedly scrubbing the coating for 1min, dropwise adding the scrubbing medium at the speed of 0.04mL/s during scrubbing to keep the scrubbing surface moist, and observing whether the coating is damaged;
the above water resistance, temperature denaturation resistance and washfastness were all tested within 3 days after the completion of the preparation of the coating composition.
TABLE 5
| Project | Storage stability | Water resistance | Temperature resistance denaturation | Resistance to washing |
| Example 1 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 2 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 3 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 4 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 5 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 6 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, foaming, and having microcrack | After 2000 times of washing, there are cracks |
| Example 7 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, foaming, and having microcrack | After 2000 times of washing, there are cracks |
| Example 8 | No change | For 96 hours, foam | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, part of the material falls off and has cracks |
| Example 9 | No change | For 96 hours, foam | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, part of the material falls off and has cracks |
| Example 10 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 11 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 12 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 13 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 14 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 15 | No change | Foaming and cracking for 96 hours | Repeating for 3 times, foaming, and having cracks | After 2000 times of washing, part of the material falls off and has cracks |
| Example 16 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
| Example 17 | No change | Foaming and cracking for 96 hours | Repeating for 3 times, foaming, and having cracks | After 2000 times of washing, part of the material falls off and has cracks |
| Comparative example 1 | No change | Foaming and cracking for 96 hours | Repeating for 3 times, foaming, and having cracks | After 2000 times of washing, part of the material falls off and has cracks |
| Comparative example 2 | No change | Foaming and cracking for 96 hours | Repeating for 3 times, foaming, and having cracks | After 200 times of washing, part of the product falls off and has cracks |
| Comparative example 3 | No change | 96 hours, no bubbling, falling off and cracking phenomena | Repeating for 3 times, foaming, and having cracks | After 2000 times of washing, part of the material falls off and has cracks |
| Comparative example 4 | No change | Foaming and severe cracking for 96h | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, part of the material falls off and has cracks |
| Comparative example 5 | Turbidity occurs | For 96 hours, foam and slightly crack | Repeating for 3 times, and no foaming, falling off and cracking phenomenon | After 2000 times of washing, no damage is caused |
As can be seen from Table 5, the coating formed by the building waterproof coating composition provided by the invention has excellent water resistance, temperature denaturation resistance and washing resistance, the foaming, falling and cracking phenomena are avoided after soaking, freezing and heat drying for 3 times, and the coating is not damaged after 2000 times of washing, so that the building waterproof coating composition provided by the invention can be suitable for being applied to building external walls.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. The building waterproof coating composition is characterized by being prepared from the following raw materials in percentage by weight: 45-50% of aqueous acrylic emulsion, 4-10% of hydrazide compound, 17.5-20% of mica powder, 10-12.5% of shell powder, 2.5-5% of glass fiber, 1-2% of dispersing agent, 0.1-0.5% of thickener, 0.1-0.5% of defoamer and the balance of deionized water; the aqueous acrylic emulsion comprises the following components in percentage by weight: 3% of an emulsifier, 28-30% of a first mixed monomer, 20-24% of a second mixed monomer, 10% of an initiator, 2% of a neutralizer and the balance of deionized water; the first mixed monomer consists of the following components in percentage by weight: 16-22% of methyl methacrylate, 50-58% of ethyl acrylate, 7-9% of N-butyl methacrylate, 12-14% of acrylic acid and 5-6% of N, N-methylene bisacrylamide; the second mixed monomer consists of the following components in percentage by weight: 54-62% of methyl methacrylate, 6-9% of ethyl acrylate, 18-21% of n-butyl methacrylate and 14-16% of styrene;
the preparation method of the aqueous acrylic emulsion comprises the following steps:
mixing methyl methacrylate, ethyl acrylate, N-butyl methacrylate, acrylic acid and N, N-methylene bisacrylamide to obtain a first mixed monomer; mixing methyl methacrylate, ethyl acrylate, n-butyl methacrylate and styrene to obtain a second mixed monomer; mixing an emulsifier and deionized water, heating, and simultaneously dripping the first mixed monomer and 50% of initiator in total volume into a reaction kettle at a constant speed; then, the second mixed monomer and the rest initiator are simultaneously dripped into a reaction kettle at a constant speed; and after the dripping is finished, continuing to keep the temperature and stir for 1-3 hours, cooling to room temperature, adding a neutralizing agent and uniformly mixing to obtain the aqueous acrylic emulsion.
2. The architectural waterproof coating composition according to claim 1, wherein the hydrazide compound is any one of oxalic acid dihydrazide and adipic acid dihydrazide.
3. The architectural waterproof coating composition according to claim 1, wherein the emulsifier comprises at least one of sodium dodecyl sulfate, octanol polyoxyethylene ether, and sodium octyl benzenesulfonate.
4. A method for preparing the building waterproof coating composition according to any one of claims 1 to 3, comprising the steps of:
mixing the aqueous acrylic emulsion with deionized water, sequentially adding a hydrazide compound, a dispersing agent, a thickening agent and a defoaming agent, mixing, adding mica powder, shell powder and glass fiber, and mixing to obtain the building waterproof coating.
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