CN112300640A - Plant environment-friendly mildew-proof antibacterial coating and preparation method thereof - Google Patents
Plant environment-friendly mildew-proof antibacterial coating and preparation method thereof Download PDFInfo
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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
- C09D125/00—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 an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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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
- C09D131/00—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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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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
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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Abstract
The invention relates to a plant environment-friendly mildew-proof antibacterial coating and a preparation method thereof, wherein the plant environment-friendly mildew-proof antibacterial coating comprises the following raw materials: the anti-mildew and anti-bacterial agent comprises water, hydroxyethyl cellulose, a water-based dispersing agent, a pH regulator, a water-based wetting agent, a natural plant anti-bacterial and anti-mildew agent, titanium dioxide, calcined kaolin, calcium carbonate, diatomite, superfine zinc oxide, an emulsion, an anti-freezing agent, a film forming auxiliary agent and a water-based defoaming agent, wherein natural plant components are used for performing anti-mildew and anti-bacterial, and in addition, the superfine zinc oxide powder is added to perform anti-mildew and anti-bacterial cooperation, so that indoor formaldehyde can be efficiently removed, and the effect of purifying the indoor environment is jointly; the natural plant components and the inorganic nano material are utilized to perform mildew prevention, antibiosis and aldehyde removal, so that the coating is healthier and more environment-friendly.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a plant environment-friendly mildew-proof antibacterial coating and a preparation method thereof.
Background
In recent years, with the continuous development of social economy and the continuous improvement of living standard, people have higher requirements on life quality, and the rise of indoor decoration causes a series of air pollution problems, thereby causing wide attention of people.
The decoration materials such as plates and adhesives used in the decoration of new houses and the newly purchased furniture and cabinets are often the source of formaldehyde. In addition, the antibacterial components in the existing paint are isothiazolinone, benzimidazole, formaldehyde slow-release agents and the like, and the antibacterial agents can effectively kill bacteria, but have irritation to skin, have strict requirements on the addition amount, and can be slowly decomposed over time. Therefore, the prepared healthy environment-friendly coating can effectively remove indoor formaldehyde, and meanwhile, the mildew-proof, antibacterial and formaldehyde-removing effects of a paint film need to be improved, so that a healthy and environment-friendly indoor environment is created.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems in the prior art, the invention provides an environment-friendly plant mildew-proof antibacterial coating and a preparation method thereof, which utilize natural plant components for mildew-proof and antibacterial, and in addition, the addition of superfine zinc oxide powder not only can synergistically perform mildew-proof and antibacterial functions, but also can efficiently remove indoor formaldehyde, and jointly realize the effect of purifying indoor environment; the natural plant components and the inorganic nano material are utilized to perform mildew prevention, antibiosis and aldehyde removal, so that the coating is healthier and more environment-friendly.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
an environment-friendly plant mildew-proof antibacterial coating comprises the following raw materials in parts by weight: 24-30 parts of water, 0.3-0.5 part of hydroxyethyl cellulose, 0.5-0.8 part of water-based dispersing agent, 0.1-0.3 part of pH regulator, 0.1-0.3 part of water-based wetting agent, 0.2-2 parts of natural plant antibacterial mildew preventive, 15-20 parts of titanium dioxide, 7-10 parts of calcined kaolin, 10-15 parts of calcium carbonate, 6-15 parts of diatomite, 1-3 parts of superfine zinc oxide, 18-25 parts of emulsion, 0.5-1 part of antifreeze, 0.5-1 part of film-forming additive and 0.4-0.7 part of water-based defoamer.
Furthermore, the hydroxyethyl cellulose is nonionic water-soluble cellulose ether, and the viscosity of the slurry is increased.
Further, the aqueous dispersant is a polyacrylic acid sodium salt.
Further, the natural plant antibacterial and antifungal agent is a green tea extract and a lemon extract, the ratio of the green tea extract to the lemon extract is 1: 5-5: 1, the main component of the green tea extract is epigallocatechin gallate, and the main component of the lemon extract is citral.
Further, the defoaming agent is a silicone defoaming agent.
Further, the emulsion is one or more of styrene-acrylic emulsion, silicone-acrylic emulsion, pure acrylic emulsion and vinyl acetate-acrylic emulsion.
Further, the film-forming assistant is alcohol ester.
Further, the green tea extract and the lemon extract are respectively prepared by drying green tea and lemon peel at low temperature, crushing and sieving to prepare dry powder, and the green tea dry powder and the lemon peel dry powder are mixed according to the proportion of 1:1 to obtain mixed dry powder; then mixing the components in a weight ratio of 1: 10, refluxing and extracting the mixed dry powder of the green tea and the lemon peel for 8 hours at the temperature of 60-100 ℃ by using an acetone aqueous solution with the volume fraction of 50% to obtain an extracting solution; distilling the extractive solution, and freeze drying.
A preparation method of plant environment-friendly mildew-proof antibacterial coating comprises the following specific steps:
step S1: sequentially adding water, hydroxyethyl cellulose and a pH regulator into the reaction kettle at a rotating speed of less than 600rpm for dispersing for 2-4 min;
step S2: keeping the rotating speed of the reaction kettle unchanged, adding a natural plant antibacterial mildew preventive, and dispersing for 2-5 min;
step S3: increasing the rotating speed of the reaction kettle to 600-class 1000rpm, sequentially adding a water-based wetting agent, a water-based dispersing agent, a defoaming agent, titanium dioxide, calcined kaolin, calcium carbonate, diatomite and superfine zinc oxide, increasing the rotating speed of the reaction kettle to 1200-class 1500rpm, and dispersing for 15-25 min;
step S4: regulating the rotating speed of the reaction kettle to 700 plus 1000rpm, sequentially adding the emulsion, the antifreeze and the film-forming additive, and continuously stirring for 10-15min to obtain a finished product.
(III) advantageous effects
The invention has the beneficial effects that: 1. the antibacterial mildew preventive is prepared from natural plant components, and can efficiently remove bacteria and mildew.
2. The antibacterial mildew preventive is derived from natural plant components, and does not contain preservatives such as isothiazolinone and formaldehyde slow-release agents, so that the coating is healthier and more environment-friendly.
3. The added superfine zinc oxide can generate electron-hole pairs under the illumination condition, can effectively remove indoor formaldehyde, and can cooperate with natural plant components to realize mildew prevention and antibiosis, so as to achieve the long-acting mildew prevention and antibiosis effects.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
An environment-friendly plant mildew-proof antibacterial coating comprises the following raw materials in parts by weight: 24-30 parts of water, 0.3-0.5 part of hydroxyethyl cellulose, 0.5-0.8 part of water-based dispersing agent, 0.1-0.3 part of pH regulator, 0.1-0.3 part of water-based wetting agent, 0.2-2 parts of natural plant antibacterial mildew preventive, 15-20 parts of titanium dioxide, 7-10 parts of calcined kaolin, 10-15 parts of calcium carbonate, 6-15 parts of diatomite, 1-3 parts of superfine zinc oxide, 18-25 parts of emulsion, 0.5-1 part of antifreeze, 0.5-1 part of film-forming additive and 0.4-0.7 part of water-based defoamer.
Furthermore, the hydroxyethyl cellulose is nonionic water-soluble cellulose ether, and the viscosity of the slurry is increased.
Further, the aqueous dispersant is a polyacrylic acid sodium salt.
Further, the natural plant antibacterial mildew inhibitor is a green tea extract and a lemon extract, and the ratio of the green tea extract to the lemon extract is 1: 5-5: 1; the green tea extract mainly contains epigallocatechin gallate, and the lemon extract mainly contains citral.
Further, the defoaming agent is a silicone defoaming agent.
Further, the emulsion is one or more of styrene-acrylic emulsion, silicone-acrylic emulsion, pure acrylic emulsion and vinyl acetate-acrylic emulsion.
Further, the film-forming assistant is alcohol ester.
Further, the green tea extract and the lemon extract are respectively prepared by drying green tea and lemon peel at low temperature, crushing and sieving to prepare dry powder, and the green tea dry powder and the lemon peel dry powder are mixed according to the proportion of 1:1 to obtain mixed dry powder; then mixing the components in a weight ratio of 1: 10, refluxing and extracting the mixed dry powder of the green tea and the lemon peel for 8 hours at the temperature of 60-100 ℃ by using an acetone aqueous solution with the volume fraction of 50% to obtain an extracting solution; distilling the extractive solution, and freeze drying; the preparation process of other mixing ratios of the extract is similar, and only the adding ratio of the dry powder needs to be changed. The extraction operation is conventional.
A preparation method of plant environment-friendly mildew-proof antibacterial coating comprises the following specific steps:
step S1: sequentially adding water, hydroxyethyl cellulose and a pH regulator into the reaction kettle at a rotating speed of less than 600rpm for dispersing for 2-4 min;
step S2: keeping the rotating speed of the reaction kettle unchanged, adding a natural plant antibacterial mildew preventive, and dispersing for 2-5 min;
step S3: increasing the rotating speed of the reaction kettle to 600-class 1000rpm, sequentially adding a water-based wetting agent, a water-based dispersing agent, a defoaming agent, titanium dioxide, calcined kaolin, calcium carbonate, diatomite and superfine zinc oxide, increasing the rotating speed of the reaction kettle to 1200-class 1500rpm, and dispersing for 15-25 min;
step S4: regulating the rotating speed of the reaction kettle to 700 plus 1000rpm, sequentially adding the emulsion, the antifreeze and the film-forming additive, and continuously stirring for 10-15min to obtain a finished product.
The performance of the plant environment-friendly mildew-proof antibacterial coating obtained by the invention has the advantages that the antibacterial rate to escherichia coli and staphylococcus aureus reaches more than 99.9%, the resistance reaches more than 95%, the mildew-proof effect to moulds such as Asterina graminiformis mould and Penicillium funiculosum is 0 grade, and the existence of VOC (volatile organic Compounds) cannot be detected.
The plant environment-friendly mildew-proof antibacterial aldehyde-removing coating disclosed by the invention utilizes natural plant components as an antibacterial mildew preventive, so that the coating is efficient in mildew prevention and antibiosis and is healthier and more environment-friendly. The electron-hole pair generated by the zinc oxide nano material can effectively remove indoor formaldehyde and can be used for long-acting mildew prevention and antibiosis in cooperation with the natural plant antibacterial mildew preventive. The coating disclosed by the invention is more excellent in aldehyde removal performance, and the mildew-proof and antibacterial performance of the coating is also excellent under the condition that antibacterial and mildewproof agents such as isothiazolinone, benzimidazole and formaldehyde slow-release agents are not used, so that the generation of VOC (volatile organic Compounds) can not be detected.
The invention uses natural plant components as the antibacterial mildew preventive, which can efficiently remove bacteria and mould; the antibacterial mildew preventive is derived from natural plant components and does not contain preservatives such as isothiazolinone and formaldehyde slow-release agents, so that the coating is healthier and more environment-friendly; the added superfine zinc oxide can generate electron-hole pairs under the illumination condition, can effectively remove indoor formaldehyde, and can cooperate with natural plant components to realize mildew prevention and antibiosis, so as to achieve the long-acting mildew prevention and antibiosis effects.
Example 1
Adjusting the rotating speed of a reaction kettle to 500rpm, adding 28 parts of water, 0.4 part of hydroxyethyl cellulose, 0.5 part of water-based dispersing agent, 0.2 part of water-based wetting agent, 1 part of natural plant antibacterial mildew preventive and 0.2 part of water-based defoaming agent, increasing the rotating speed of the reaction kettle to 1000rpm, respectively adding 18 parts of titanium dioxide, 9 parts of kaolin, 15 parts of calcium carbonate, 13 parts of diatomite and 2 parts of superfine zinc oxide, continuously adjusting the rotating speed of the reaction kettle to 1300rpm, stirring for 20min, uniformly mixing, reducing the rotating speed of the reaction kettle to 1000rpm, continuously adding 22 parts of emulsion, 0.5 part of antifreezing agent, 0.8 part of film-forming auxiliary agent and 0.3 part of water-based defoaming agent, and stirring for 15min to obtain the product.
Example 2
Adjusting the rotating speed of a reaction kettle to 600rpm, adding 30 parts of water, 0.4 part of hydroxyethyl cellulose, 0.5 part of water-based dispersing agent, 0.2 part of water-based wetting agent, 1.5 parts of natural plant antibacterial mildew preventive and 0.2 part of water-based defoaming agent, increasing the rotating speed of the reaction kettle to 900rpm, respectively adding 16 parts of titanium dioxide, 8 parts of kaolin, 13 parts of calcium carbonate, 15 parts of diatomite and 1.5 parts of superfine zinc oxide, continuously adjusting the rotating speed of the reaction kettle to 1300rpm, stirring for 15min, uniformly mixing, reducing the rotating speed of the reaction kettle to 1000rpm, continuously adding 23 parts of emulsion, 0.5 part of antifreezing agent, 0.8 part of film-forming assistant and 0.3 part of water-based defoaming agent, and stirring for 12 min. The product is obtained.
Example 3
Adjusting the rotating speed of a reaction kettle to 500rpm, adding 29 parts of water, 0.4 part of hydroxyethyl cellulose, 0.5 part of water-based dispersing agent, 0.2 part of water-based wetting agent, 1.8 parts of natural plant components and 0.2 part of water-based defoaming agent, increasing the rotating speed to 900rpm, respectively adding 19 parts of titanium dioxide, 7 parts of kaolin, 15 parts of calcium carbonate, 10 parts of diatom and 1.5 parts of superfine zinc oxide, continuously adjusting the rotating speed of the reaction kettle to 1300rpm, stirring for 15min, uniformly mixing, reducing the rotating speed of the reaction kettle to 1000rpm, continuously adding 23 parts of emulsion, 0.5 part of antifreezing agent, 0.8 part of film-forming assistant and 0.3 part of water-based defoaming agent, and stirring for 15min to obtain the product.
Comparative example 1
Adjusting the rotating speed of a reaction kettle to 500rpm, adding 29 parts of water, 0.4 part of hydroxyethyl cellulose, 0.5 part of water-based dispersing agent, 0.2 part of water-based wetting agent, 0.5 part of preservative and 0.2 part of water-based defoaming agent, increasing the rotating speed to 1000rpm, respectively adding 18 parts of titanium dioxide, 9 parts of kaolin, 15 parts of calcium carbonate and 11 parts of diatomite, continuously increasing the rotating speed of the reaction kettle to 1300rpm, stirring for 15min, uniformly mixing, reducing the rotating speed of the reaction kettle to 1000rpm, continuously adding 23 parts of emulsion, 0.5 part of antifreezing agent, 0.9 part of film-forming auxiliary agent, 0.3 part of water-based defoaming agent and 0.6 part of antibacterial agent, and stirring for 15min to obtain a comparative product.
The examples 1-3 of the invention and the comparative example 1 are compared in performance, wherein the low-temperature stability, the low-temperature film-forming property, the alkali resistance and the scrub resistance are referred to the national standard GB/T9756-2018; the formaldehyde purification efficiency refers to JC/T1074-.
Table 1 compares the performance of the environment-friendly type mildew-proof antibacterial coating for plants of the present invention with that of the comparative example.
In the table, a is bacteria tested for antibacterial activity, including Escherichia coli, Staphylococcus aureus; the moulds for the mildew resistance test comprise: chaetomium globosum, Paecilomyces variotii, Penicillium funiculosum and Aspergillus niger.
And (4) conclusion: compared with the comparative example 1, the coatings of the examples 1 to 3 of the invention are more excellent in aldehyde removal performance, and the coatings are also excellent in mildew-proof and antibacterial performance without using antibacterial and mildewproof agents such as isothiazolinone, benzimidazole and formaldehyde slow-release agents, and the generation of VOC can not be detected.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (9)
1. An environment-friendly plant mildew-proof antibacterial coating is characterized by comprising the following raw materials in parts by weight: 24-30 parts of water, 0.3-0.5 part of hydroxyethyl cellulose, 0.5-0.8 part of water-based dispersing agent, 0.1-0.3 part of pH regulator, 0.1-0.3 part of water-based wetting agent, 0.2-2 parts of natural plant antibacterial mildew preventive, 15-20 parts of titanium dioxide, 7-10 parts of calcined kaolin, 10-15 parts of calcium carbonate, 6-15 parts of diatomite, 1-3 parts of superfine zinc oxide, 18-25 parts of emulsion, 0.5-1 part of antifreeze, 0.5-1 part of film-forming additive and 0.4-0.7 part of water-based defoamer.
2. The environment-friendly plant mildew-proof and antibacterial coating of claim 1, wherein the hydroxyethyl cellulose is nonionic water-soluble cellulose ether, and increases the viscosity of the slurry.
3. The plant environment-friendly type mildew-proof and antibacterial coating material as claimed in claim 1, wherein the aqueous dispersant is polyacrylic acid sodium salt.
4. The environment-friendly plant mildew-proof and antibacterial coating as claimed in claim 1, wherein the natural plant antibacterial and antifungal agent is green tea extract and lemon extract, and the ratio of the green tea extract to the lemon extract is 1: 5-5: 1.
5. The environment-friendly type plant mildew-proof and antibacterial coating of claim 1, wherein the defoaming agent is an organic silicon defoaming agent.
6. The environment-friendly plant mildew-proof and antibacterial coating of claim 1, wherein the emulsion is one or more of styrene-acrylic emulsion, silicone-acrylic emulsion, acrylic emulsion and vinyl acetate-acrylic emulsion.
7. The plant environment-friendly type mildew-proof and antibacterial coating of claim 1, wherein the film forming aid is an alcohol ester.
8. The environment-friendly plant mildew-proof antibacterial coating as claimed in claim 4, wherein the green tea extract and the lemon extract are respectively prepared by drying green tea and lemon peel at low temperature, crushing, sieving and preparing dry powder, and the green tea dry powder and the lemon peel dry powder are mixed in a ratio of 1:1 to obtain mixed dry powder; then mixing the components in a weight ratio of 1: 10, refluxing and extracting the mixed dry powder of the green tea and the lemon peel for 8 hours at the temperature of 60-100 ℃ by using an acetone aqueous solution with the volume fraction of 50% to obtain an extracting solution; distilling the extractive solution, and freeze drying.
9. A preparation method of the plant environment-friendly type mildew-proof antibacterial coating as claimed in any one of claims 1-8, characterized by comprising the following steps:
step S1: sequentially adding water, hydroxyethyl cellulose and a pH regulator into the reaction kettle at a rotating speed of less than 600rpm for dispersing for 2-4 min;
step S2: keeping the rotating speed of the reaction kettle unchanged, adding a natural plant antibacterial mildew preventive, and dispersing for 2-5 min;
step S3: increasing the rotating speed of the reaction kettle to 600-class 1000rpm, sequentially adding a water-based wetting agent, a water-based dispersing agent, a defoaming agent, titanium dioxide, calcined kaolin, calcium carbonate, diatomite and superfine zinc oxide, increasing the rotating speed of the reaction kettle to 1200-class 1500rpm, and dispersing for 15-25 min;
step S4: regulating the rotating speed of the reaction kettle to 700 plus 1000rpm, sequentially adding the emulsion, the antifreeze and the film-forming additive, and continuously stirring for 10-15min to obtain a finished product.
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