CN111393941A - High-elasticity environment-friendly emulsion paint and preparation method thereof - Google Patents
High-elasticity environment-friendly emulsion paint and preparation method thereof Download PDFInfo
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- CN111393941A CN111393941A CN202010474417.7A CN202010474417A CN111393941A CN 111393941 A CN111393941 A CN 111393941A CN 202010474417 A CN202010474417 A CN 202010474417A CN 111393941 A CN111393941 A CN 111393941A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
- C09D5/028—Pigments; Filters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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Abstract
The invention relates to a novel high-elasticity environment-friendly latex paint which comprises the following components in parts by weight: 25-40 parts of water, 25-40 parts of modified acrylic emulsion, 15-30 parts of pigment, 5-8 parts of filler, 3-7 parts of washing kaolin, 15-30 parts of heavy calcium carbonate, 1-3 parts of dispersant, 0.2-0.6 part of defoamer and 1-3 parts of film-forming assistant. The invention has the beneficial effects that: (1) the acrylic emulsion modified by organosilicon and epoxy resin can effectively improve the elasticity of the emulsion paint, and increase the mechanical property and high and low temperature resistance; (2) the titanium dioxide coated by the alumina can effectively protect the photosensitivity of the titanium dioxide and improve the weather resistance of the emulsion paint; (3) the latex paint prepared by the invention has simple construction process, good film forming process, strong weather resistance and good elasticity, and can be widely used for indoor or outdoor decoration.
Description
Technical Field
The invention belongs to the technical field of emulsion paints, and particularly relates to a high-elasticity environment-friendly emulsion paint and a preparation method thereof.
Background
At present, the variety of coatings used in daily decoration is various, emulsion paint is one of the widely used wall decoration materials at present, along with the continuous improvement of the living standard, the requirements of people on the decoration materials are increased, the existing coatings are various, some coatings are not beneficial to construction, some properties can not meet the requirements, and the damage to human bodies is large. The elasticity of the latex paint film is an important property of the latex paint, and can directly influence the mechanical property of the latex paint film. Therefore, the coating performance of the latex paint is an important index for evaluating the comprehensive performance of the latex paint and is also an important factor for measuring the quality of the latex paint product.
Traditionally, the elasticity of latex paint is general, and in the process of latex paint drying, when the temperature changes, temperature cracks are generated due to thermal expansion and cold contraction, when the humidity changes, drying cracks are generated due to humidity expansion and drying shrinkage, which are phenomena caused by insufficient elasticity of latex paint, in addition, most of traditional paint has poor durability, and the phenomenon of falling off can be caused after long-term use. Chinese invention patent 201910698187.X discloses a preparation method of latex paint with strong durability and good elasticity, and the used raw materials comprise high titanium powder, talcum powder, nano anti-pollution auxiliary agent, acrylate, silicate solution, dispersing agent, sodium silicate, sodium lactate and nitric acid solution. However, the existing latex paints still have the problems of low elasticity and poor weather resistance, and the development of novel high-elasticity environment-friendly latex paints is urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a novel high-elasticity environment-friendly latex paint and a preparation method thereof. The emulsion paint comprises the following components in parts by weight: 25-40 parts of water, 25-40 parts of modified acrylic emulsion, 15-30 parts of pigment, 5-8 parts of filler, 3-7 parts of washing kaolin, 15-30 parts of heavy calcium carbonate, 1-3 parts of dispersant, 0.2-0.6 part of defoamer and 1-3 parts of film-forming assistant;
the modified acrylic emulsion is an organosilicon and epoxy resin copolymerization modified emulsion, and the comonomer comprises methyl methacrylate, styrene, acrylic acid, E-44 epoxy resin and vinyl triethoxysilane; after the acrylic emulsion modified by organic silicon and epoxy resin is formed into a film, the shrinkage rate is low, and the elasticity is better; the introduction of the organic silicon further improves the high and low temperature resistance;
the preparation method of the modified acrylic emulsion comprises the following steps: (1) uniformly mixing comonomers of methyl methacrylate, styrene, acrylic acid, E-44 epoxy resin and vinyl triethoxysilane according to a mass ratio to prepare a mixed monomer; (2) adding 40% of mixed monomer into a reaction kettle, starting stirring, slowly dropwise adding diethylene glycol butyl ether, stirring for 20-30min after dropwise adding, dropwise adding half amount of sodium persulfate solution, raising the temperature to 80-85 ℃ after dropwise adding, and carrying out heat preservation reaction for 2-3 h; (3) and then dropwise adding the rest mixed monomer, raising the temperature to 85-90 ℃ after dropwise adding, dropwise adding the rest sodium persulfate solution, keeping the temperature for reaction for 2-3h after dropwise adding, then reducing the temperature to 40-45 ℃, finally dropwise adding a small amount of ammonia water, and reducing the temperature to room temperature to obtain the acrylic emulsion modified by the organic silicon epoxy resin.
The pigment is modified titanium dioxide, and specifically a compact and continuous alumina film layer is formed on the surface of titanium dioxide under the conditions of high temperature and high pH value; an alumina film layer is formed on the surface of the modified titanium dioxide, and the film layer can effectively avoid the photochemical activity of titanium dioxide and improve the weather resistance of the titanium dioxide;
the preparation method of the modified titanium dioxide comprises the following steps: (1) mixing TiCl4Preparing slurry with the concentration of 450 g/L by using titanium dioxide particles subjected to gas phase oxidation, adding a sodium hexametaphosphate solution according to the mass fraction of 0.2 percent of the titanium dioxide content to adjust the pH value to 10.0, introducing the slurry into a sand mill, sanding for 10min, then adding the mixture into a reaction kettle, raising the temperature to 70 ℃ under high-speed stirring, (2) pouring a sodium metaaluminate solution (100 g/L) with the mass number of 2 percent of the titanium dioxide into the reaction kettle, then pumping aluminum sulfate (100 g/L) into the reaction kettle by using a peristaltic pump at the flow rate of 1.5m L/min, and stopping adding the aluminum sulfate when the pH value reaches 8, (3) preserving the temperature and aging for 1-2h under stirring, then washing, press filtering, drying and crushing to obtain the modified titanium dioxide.
The filler is composite powder consisting of fumed silica and wollastonite powder according to the weight ratio of 1-3: 1, the average particle size is 0.2-1 mu m, and the composite powder can effectively improve the color and the construction performance of the emulsion paint;
the washed kaolin is high-neck soil which is washed and dried by 0.5% of dilute nitric acid, and the 0.5% of dilute nitric acid can effectively clean metal oxides on the surface of the kaolin, so that the purity is improved, and the construction performance and the stability of the product are further improved;
the average grain diameter of the heavy calcium carbonate is 1-3 mu m;
the dispersing agent is at least one of sodium dodecyl sulfate, methyl amyl alcohol, polyacrylamide, sodium tripolyphosphate or water glass;
the defoaming agent is an organic silicon defoaming agent and comprises at least one of polydimethylsiloxane, fluorosilicone and ethylene glycol siloxane; the surface tension of the defoaming agent, water and modified acrylic emulsion is minimum, and the defoaming effect is best;
the film-forming additive is a composition of alcohol ester twelve and propylene glycol monobutyl ether, the mass ratio of the alcohol ester twelve and the propylene glycol monobutyl ether is 1: 1-1.5, the composition makes full use of hydroxyl and ether groups of the propylene glycol monobutyl ether, and has better film-forming property and better mechanical property;
the preparation method of the novel high-elasticity environment-friendly latex paint specifically comprises the following steps:
(1) adding water, modified acrylic emulsion and a defoaming agent in corresponding parts by mass into a reaction kettle, and fully stirring and mixing to obtain a base slurry;
(2) adding pigment, filler, washing kaolin, heavy calcium carbonate, dispersant, defoamer and film-forming assistant into the slurry in sequence; raising the temperature to 40-50 ℃, stirring and mixing for 2-3h, then cooling to room temperature, adding a pH regulator to regulate the pH to be neutral, and continuously stirring for 20-30min to obtain the high-elasticity environment-friendly latex paint.
The pH regulator is at least one of ammonia water, triethylamine, ethanolamine and diethanolamine.
The invention has the beneficial effects that: (1) the acrylic emulsion modified by organosilicon and epoxy resin can effectively improve the elasticity of the emulsion paint, and increase the mechanical property and high and low temperature resistance; (2) the titanium dioxide coated by the alumina can effectively protect the photosensitivity of the titanium dioxide and improve the weather resistance of the emulsion paint; (3) the latex paint prepared by the invention has simple construction process, good film forming process, strong weather resistance and good elasticity, and can be widely used for indoor or outdoor decoration.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
The modified acrylic emulsion used in the embodiment of the invention is self-made organosilicon and epoxy resin copolymerization modified emulsion, and the comonomer comprises methyl methacrylate, styrene, acrylic acid, E-44 epoxy resin and vinyl triethoxysilane;
the pigment used in the embodiment of the invention is self-made modified titanium dioxide, and specifically, a compact and continuous alumina film layer is formed on the surface of titanium dioxide under the conditions of high temperature and high pH value;
the filler used in the embodiment of the invention is composite powder consisting of fumed silica and wollastonite powder according to the weight ratio of 2.4: 1, the average particle size is 0.56 mu m, and the composite powder can effectively improve the color and the construction performance of the latex paint;
the washing kaolin used in the embodiment of the invention is the high-collar soil which is soaked in 0.5% dilute nitric acid for 12h and then washed and dried;
the average grain diameter of the heavy calcium carbonate used in the embodiment of the invention is 1.5 μm;
the film-forming assistant composite film-forming agent is a composition of alcohol ester twelve and propylene glycol monobutyl ether, and the mass ratio of the alcohol ester twelve to the propylene glycol monobutyl ether is 1: 1.2.
The preparation method of the modified acrylic emulsion comprises the following specific steps of (1) sequentially adding 400g of comonomer methyl methacrylate, 230g of styrene, 350g of acrylic acid, 30g of E-44 epoxy resin and 130g of vinyl triethoxysilane into a reaction kettle, (2) adding 456g of 40% mixed monomer into the reaction kettle, starting stirring, slowly dropwise adding 32g of diethylene glycol butyl ether, stirring for 20-30min after dropwise adding, then dropwise adding a half amount of sodium persulfate (10%, 50m L) solution, raising the temperature to 80-85 ℃ after dropwise adding, carrying out heat preservation reaction for 2-3h, and (3) dropwise adding 684g of the rest mixed monomer, raising the temperature to 85-90 ℃ after dropwise adding, then dropwise adding the rest of sodium persulfate solution (10%, 50m L), carrying out heat preservation reaction for 2-3h, then lowering the temperature to 40-45 ℃, finally dropwise adding a small amount of ammonia water, adjusting the pH value to be neutral, and lowering the temperature to room temperature to obtain the acrylic emulsion modified by the organosilicon epoxy resin.
The preparation of the modified titanium dioxide comprises the following specific preparation steps: (1) mixing TiCl4Preparing slurry with the concentration of 450 g/L by using titanium dioxide particles subjected to gas phase oxidation, adding a sodium hexametaphosphate solution according to the mass fraction of 0.2 percent of the titanium dioxide content to adjust the pH value to 10.0, introducing the slurry into a sand mill, sanding for 10min, then adding the mixture into a reaction kettle, raising the temperature to 70 ℃ under high-speed stirring, (2) pouring a sodium metaaluminate solution (100 g/L) with the mass number of 2 percent of the titanium dioxide into the reaction kettle, then pumping aluminum sulfate (100 g/L) into the reaction kettle by using a peristaltic pump at the flow rate of 1.5m L/min, and stopping adding the aluminum sulfate when the pH value reaches 8, (3) preserving the temperature and aging for 1-2h under stirring, then washing, press filtering, drying and crushing to obtain the modified titanium dioxide.
The present invention will be described in detail below with reference to the above-mentioned raw materials,
example 1:
the embodiment provides a novel high-elasticity environment-friendly latex paint which comprises the following components in parts by weight: 40 parts of water, 30 parts of modified acrylic emulsion, 18 parts of modified titanium dioxide, 6 parts of composite filler, 6 parts of washing kaolin, 21 parts of heavy calcium carbonate, 1.8 parts of sodium dodecyl sulfate, 0.3 part of dimethyl siloxane defoamer and 2.1 parts of composite film-forming assistant.
The preparation method of the environment-friendly latex paint comprises the following specific steps:
(1) adding 400g of water, 300g of modified acrylic emulsion and 3g of defoaming agent in corresponding parts by mass into a reaction kettle in sequence, and fully stirring and mixing to obtain base slurry;
(2) adding 180g of modified titanium dioxide, 60g of composite filler, 60g of washed kaolin, 210g of ground calcium carbonate, 18g of sodium dodecyl sulfate, 3g of dimethyl siloxane and 21g of composite film-forming aid into the base slurry in sequence; raising the temperature to 40-50 ℃, stirring and mixing for 2-3h, then cooling to room temperature, adding ammonia water to adjust the pH value to be neutral, and continuously stirring for 20-30min to obtain the high-elasticity environment-friendly latex paint.
Example 2:
the embodiment provides a novel high-elasticity environment-friendly latex paint which comprises the following components in parts by weight: 35 parts of water, 35 parts of modified acrylic emulsion, 24 parts of modified titanium dioxide, 7 parts of composite filler, 5 parts of washing kaolin, 18 parts of heavy calcium carbonate, 2 parts of sodium tripolyphosphate, 0.5 part of dimethyl siloxane defoamer and 2 parts of composite film-forming assistant.
The preparation method is the same as that of the example 1, and only equivalent substitution is carried out on the corresponding mixture ratio.
Example 3:
the embodiment provides a novel high-elasticity environment-friendly latex paint which comprises the following components in parts by weight: 30 parts of water, 30 parts of modified acrylic emulsion, 18 parts of modified titanium dioxide, 6 parts of composite filler, 4 parts of washing kaolin, 17 parts of heavy calcium carbonate, 2 parts of water glass, 0.5 part of fluorosilicone defoamer and 2 parts of composite film-forming assistant.
The preparation method is the same as that of the example 1, and only equivalent substitution is carried out on the corresponding mixture ratio.
In order to verify the technical effect of the invention, the performance of the latex paint prepared in the embodiment of the invention is tested, the performance of the latex paint is tested according to the JG/T172-2005 elastic building coating standard, and the test result is compared with the prior patent technology CN201910698187.X, and the specific test result is shown in Table 1.
TABLE 1 mechanical Properties of the emulsion paints
As can be seen from the data in Table 1, the mechanical properties of the latex paint prepared by the invention are remarkably improved. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A novel high-elasticity environment-friendly latex paint comprises the following components in parts by weight: 25-40 parts of water, 25-40 parts of modified acrylic emulsion, 15-30 parts of pigment, 5-8 parts of filler, 3-7 parts of washing kaolin, 15-30 parts of heavy calcium carbonate, 1-3 parts of dispersant, 0.2-0.6 part of defoamer and 1-3 parts of film-forming assistant;
the modified acrylic emulsion is an organosilicon and epoxy resin copolymerization modified emulsion, and the comonomer comprises methyl methacrylate, styrene, acrylic acid, E-44 epoxy resin and vinyl triethoxysilane;
the pigment is modified titanium dioxide, and particularly a compact and continuous alumina film layer is formed on the surface of titanium dioxide under the conditions of high temperature and high pH value.
2. The novel high-elasticity environment-friendly latex paint as claimed in claim 1, wherein the filler is composite powder consisting of fumed silica and wollastonite powder in a weight ratio of 1-3: 1, and the average particle size is 0.2-1 μm.
3. The novel high-elasticity environment-friendly latex paint as claimed in claim 1, wherein the water-washed kaolin is kaolin which is subjected to water washing and drying by using 0.5% dilute nitric acid.
4. The novel high-elasticity environment-friendly latex paint as claimed in claim 1, wherein the average particle size of the heavy calcium carbonate is 1-3 μm; the dispersing agent is at least one of sodium dodecyl sulfate, methyl amyl alcohol, polyacrylamide, sodium tripolyphosphate or water glass; the defoaming agent is an organic silicon defoaming agent and comprises at least one of polydimethylsiloxane, fluorosilicone and ethylene glycol siloxane; the film-forming additive is a composition of alcohol ester twelve and propylene glycol monobutyl ether, and the mass ratio of the alcohol ester twelve to the propylene glycol monobutyl ether is 1: 1-1.5.
5. The method for preparing a modified acrylic emulsion according to claim 1, comprising the steps of: (1) uniformly mixing comonomers of methyl methacrylate, styrene, acrylic acid, E-44 epoxy resin and vinyl triethoxysilane according to a mass ratio to prepare a mixed monomer; (2) adding 40% of mixed monomer into a reaction kettle, starting stirring, slowly dropwise adding diethylene glycol butyl ether, stirring for 20-30min after dropwise adding, dropwise adding half amount of sodium persulfate solution, raising the temperature to 80-85 ℃ after dropwise adding, and carrying out heat preservation reaction for 2-3 h; (3) and then dropwise adding the rest mixed monomer, raising the temperature to 85-90 ℃ after dropwise adding, dropwise adding the rest sodium persulfate solution, keeping the temperature for reaction for 2-3h after dropwise adding, then reducing the temperature to 40-45 ℃, finally dropwise adding a small amount of ammonia water, and reducing the temperature to room temperature to obtain the acrylic emulsion modified by the organic silicon epoxy resin.
6. The preparation method of the modified titanium dioxide according to claim 1, characterized by comprising the following steps: (1) mixing TiCl4Preparing slurry with the concentration of 450 g/L by using titanium dioxide particles subjected to gas phase oxidation, adding a sodium hexametaphosphate solution according to the mass fraction of 0.2 percent of the titanium dioxide content to adjust the pH value to 10.0, introducing the slurry into a sand mill, sanding for 10min, then adding the mixture into a reaction kettle, raising the temperature to 70 ℃ under high-speed stirring, (2) pouring a sodium metaaluminate solution (100 g/L) with the mass number of 2 percent of the titanium dioxide into the reaction kettle, then pumping aluminum sulfate (100 g/L) into the reaction kettle by using a peristaltic pump at the flow rate of 1.5m L/min, and stopping adding the aluminum sulfate when the pH value reaches 8, (3) preserving the temperature and aging for 1-2h under stirring, then washing, press filtering, drying and crushing to obtain the modified titanium dioxide.
7. A preparation method of novel high-elasticity environment-friendly latex paint specifically comprises the following steps:
adding water, modified acrylic emulsion and a defoaming agent in corresponding parts by mass into a reaction kettle, and fully stirring and mixing to obtain a base slurry;
adding pigment, filler, washing kaolin, heavy calcium carbonate, dispersant, defoamer and film-forming assistant into the slurry in sequence; raising the temperature to 40-50 ℃, stirring and mixing for 2-3h, then cooling to room temperature, adding a pH regulator to regulate the pH to be neutral, and continuously stirring for 20-30min to obtain the high-elasticity environment-friendly latex paint.
8. The method for preparing novel high-elasticity environment-friendly latex paint according to claim 7, wherein the pH regulator is at least one of ammonia water, triethylamine, ethanolamine and diethanolamine.
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| CN113603362A (en) * | 2021-06-25 | 2021-11-05 | 吴江南玻玻璃有限公司 | Water-based environment-friendly white glaze with high adhesion and high weather resistance for photovoltaic back plate glass and preparation method thereof |
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| CN114106652A (en) * | 2022-01-10 | 2022-03-01 | 刘新霞 | Environment-friendly latex paint and preparation method thereof |
| CN115124174A (en) * | 2022-06-27 | 2022-09-30 | 一汽解放汽车有限公司 | Paint mist coagulant, and preparation method and application thereof |
| CN118388997A (en) * | 2024-07-01 | 2024-07-26 | 浙江华宝油墨有限公司 | Weather-resistant water-based polyurethane ink and preparation method thereof |
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| CN114106652A (en) * | 2022-01-10 | 2022-03-01 | 刘新霞 | Environment-friendly latex paint and preparation method thereof |
| CN115124174A (en) * | 2022-06-27 | 2022-09-30 | 一汽解放汽车有限公司 | Paint mist coagulant, and preparation method and application thereof |
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