CN112831228A - Preparation method of water-based damping coating suitable for baking at 140 DEG C - Google Patents
Preparation method of water-based damping coating suitable for baking at 140 DEG C Download PDFInfo
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- CN112831228A CN112831228A CN202110023390.4A CN202110023390A CN112831228A CN 112831228 A CN112831228 A CN 112831228A CN 202110023390 A CN202110023390 A CN 202110023390A CN 112831228 A CN112831228 A CN 112831228A
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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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- 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
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- 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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to a preparation method of a water-based damping coating suitable for being baked at 140 ℃, which is characterized by comprising the following steps: preparing the following components in parts by weight: acrylic resin emulsion: 20-30 parts of; deionized water: 3-6; defoaming agent: 0.1-0.4; 0.4-0.9 of dispersant; calcium carbonate powder or mica powder: the grain size range is 15-50 μm, 50-80; thickening agent: 0.01-0.02; microsphere foaming agent: 0.1-0.5; color paste: 0.5; polyether polyol: 1-2; modified starch: 1-2; placing acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, and starting a stirrer to stir; adding calcium carbonate powder or mica powder with the particle size range of 15-50 mu m and modified starch filler into a stirring container, and starting a stirrer for stirring; adding the color paste into a stirring container, starting a stirrer for stirring, adding the thickening agent into the stirring container, and starting the stirrer for stirring; and adding the defoaming agent into the stirring container, starting the stirrer and stirring to obtain the damping coating.
Description
Technical Field
The invention relates to the field of coatings, in particular to a preparation method of a water-based damping coating suitable for baking at 140 ℃.
Background
Along with the application of most of the existing domestic water-based damping coatings in the fields of rail transit vehicles, ships and the like, the curing time at normal temperature is usually more than 24 hours, the curing speed of the coating cannot meet the requirement of the application of automobiles with continuous production beats, the curing time can be accelerated by high-temperature baking, but when the coating of the water-based coating is thick, the surface of the coating is baked at the temperature of more than 100 ℃ and is dried to form a film, and the internal water vapor is boiled and cannot penetrate out of the coating to cause bulging or cracking, so that the appearance defect is formed.
Disclosure of Invention
The invention aims to provide a preparation method of a water-based damping coating suitable for baking at 140 ℃, the prepared coating is environment-friendly and nontoxic, the peak value of the composite loss factor is 0.18-0.25 at-10-50 ℃, and the coating does not bubble and crack under the baking at 140 ℃ of 120-.
In order to achieve the above purpose, the invention adopts the technical scheme that: a preparation method of water-based damping paint suitable for being baked at 140 ℃ comprises the following steps:
1) preparing the following components in parts by weight: acrylic resin emulsion: 20-30, the glass transition temperature Tg is-10-20 ℃; deionized water: 3-6; defoaming agent: 0.1-0.4; 0.4-0.9 of dispersant; calcium carbonate powder or mica powder: the grain size range is 15-50 μm, 60-70; thickening agent: 0.01-0.02; microsphere foaming agent: 0.1-0.5; color paste: 0.5; polyether polyol: 1-2; modified starch: 1-2;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 450-;
3) adding calcium carbonate powder or mica powder with the particle size range of 15-50 mu m and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 800-1200rpm for stirring for 8-12 minutes;
4) adding the color paste into a stirring container, starting the stirrer, and regulating the speed to 800-
5) Adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1300-;
6) adding the defoaming agent into a stirring container, starting the stirrer, and regulating the speed to 700 and 900rpm for stirring for 8-12 minutes to obtain the damping coating.
Preferably, the acrylic resin emulsion is pure acrylic emulsion or a mixture of pure acrylic and styrene-acrylic, the pure acrylic accounts for not less than 30% of the whole emulsion, and the solid content of the emulsion is 50%.
Preferably, the pure acrylic emulsion calcium comprises butyl acrylate, methyl acrylate and methacrylic acid, and the ionic stability of the pure acrylic emulsion calcium meets the calcium ionic stability of 0.2-0.5% cacl2 concentration; i.e., poor calcium ion stability relative to conventional emulsions and relatively slow film formation upon baking.
Preferably, the styrene-acrylic emulsion main monomer is styrene and butyl acrylate.
Preferably, the defoamer is a mineral oil type defoamer.
Preferably, the dispersant is a carboxylic acid copolymer type dispersant.
Preferably, the thickener is a non-associative alkali swelling thickener, the main component of which is polyacrylate, ASE for short, and belongs to an anionic thickener.
Preferably, the microsphere foaming agent is of a core-shell structure, the shell is a thermoplastic acrylic resin polymer, and the core is spherical plastic particles consisting of alkane gas.
Preferably, the polyether polyol is a polyether polyol having a boiling point of 187 to 233 ℃.
Mineral oil antifoam, which is an emulsion that disperses in water to become reasonably stable; effective under both acidic and basic conditions; can be used for architectural coatings, institutional, architectural, ACE coatings, printing inks, adhesives, emulsion polymerization, etc., such as mineral oil type defoamers from Federal and New Yoghurt, etc.
The dispersant is carboxylic acid copolymer type dispersant (also called carboxylate dispersant and polycarboxylate dispersant).
The thickener is a non-associative alkali swelling thickener, the main component of which is polyacrylate, ASE for short, and belongs to an anionic thickener, the polyacrylate is a decisive factor for thickening, and the non-associative alkali swelling thickener is mainly characterized in that a molecular chain of the thickener is spirally extended into a rod shape through the same-polarity electrostatic repulsion of carboxylate ions.
The shell is a thermoplastic acrylic resin polymer, the inner core is spherical plastic particles consisting of alkane gas, when the microsphere foaming agent is heated to a certain temperature, the thermoplastic acrylic resin shell is softened, the gas of the inner core expands in a short time, so that the volume of the inner core is increased to dozens of times of the volume of the inner core, and meanwhile, the core-shell structure cannot be damaged, so that the foaming purpose is achieved.
The high-boiling-point polyether polyol is polyether polyol with the boiling point of 187-233 ℃, can reduce the surface curing speed of the coating, and can improve the swelling and cracking phenomena of the coating under the baking conditions of 120-140 ℃ to a certain extent.
The modified starch generates gelatinization effect during high-temperature baking, can slow down the aggregation of latex particles, and can effectively improve the cracking and bulging phenomena.
Drawings
FIG. 1 is a graph showing the test results of the product obtained in example 12;
FIG. 2 is a graph showing a test of a product obtained in comparative example 18;
FIG. 3 is a graph showing a test of a product obtained in comparative example 19;
FIG. 4 is a graph showing the test results of example 20, item No. one;
FIG. 5 is a graph showing the test results of example 20, item No. two;
FIG. 6 is a test chart of a product obtained in example 20, number three;
FIG. 7 is a graph showing the test results of the product obtained in EXAMPLE 20, number four;
FIG. 8 is a graph showing the results of a test on a product obtained in EXAMPLE 20 # V.
Detailed Description
The present invention is described in detail below for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Comparative example 1
Preparing the following components in parts by weight: acrylic resin emulsion: 10, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Comparative example 2
1) Preparing the following components in parts by weight:
acrylic resin emulsion: 15, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 3
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 4
1) Preparing the following components in parts by weight: acrylic resin emulsion: 25, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of-10 ℃; deionized water: 3; defoaming agent: 0.4; dispersant 1: 0.4; mica powder: phi is 15-50 mu m, 65; thickening agent: 0.02; microsphere foaming agent: 0.1; color paste: 0.5; polyether polyol: 2; modified starch: 1;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 400rpm for stirring for 7 minutes;
3) adding mica powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 800rpm for stirring for 12 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 800rpm to stir for 12 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1300rpm to stir for 12 minutes;
6) and adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 700rpm, and stirring for 12 minutes to obtain the damping coating.
Example 5
1) Preparing the following components in parts by weight:
acrylic resin emulsion: 30, the acrylic resin emulsion preferably contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 20 ℃; deionized water: 6; defoaming agent: 0.1; 0.9 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 60; thickening agent: 0.01; microsphere foaming agent: 0.5; color paste: 0.5; polyether polyol: 1; modified starch: 2;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 600rpm for stirring for 4 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1200rpm for stirring for 8 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1200rpm to stir for 8 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1700rpm to stir for 8 minutes;
6) and adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 900rpm, and stirring for 8 minutes to obtain the damping coating.
Comparative example 6
1) Preparing the following components in parts by weight: acrylic resin emulsion: 35, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of-10 ℃; deionized water: 6; defoaming agent: 0.1; 0.9 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 60; thickening agent: 0.01; microsphere foaming agent: 0.5; color paste: 0.5; polyether polyol: 1; modified starch: 2; 2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 600rpm for stirring for 4 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1200rpm for stirring for 8 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1200rpm to stir for 8 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1700rpm to stir for 8 minutes;
6) and adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 900rpm, and stirring for 8 minutes to obtain the damping coating.
Comparative example 7
1) Preparing the following components in parts by weight: acrylic resin emulsion: 40, wherein the acrylic resin emulsion contains 30 percent of pure acrylic emulsion and has a glass transition temperature Tg of-10 ℃; deionized water: 6; defoaming agent: 0.1; 0.9 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 60; thickening agent: 0.01; microsphere foaming agent: 0.5; color paste: 0.5; polyether polyol: 1; modified starch: 2; 2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 600rpm for stirring for 4 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1200rpm for stirring for 8 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1200rpm to stir for 8 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1700rpm to stir for 8 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 900rpm, and stirring for 8 minutes to prepare the damping coating, wherein the following components in parts by weight are prepared.
Comparative example 8
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 0% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Comparative example 9
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 15% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Comparative example 10
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 20% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Comparative example 11
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 25% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 12
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 6; defoaming agent: 0.3; 0.5 of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 65; thickening agent: 0.015, microsphere foaming agent: 0.4; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 13
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 35% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 14
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 40% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 15
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 45% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting the stirrer, regulating the speed to 1000rpm, and stirring for 10 minutes
5) Adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 16
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 50% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
Example 17
1) Preparing the following components in parts by weight: acrylic resin emulsion: 20, wherein the acrylic resin emulsion contains 100% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 5; defoaming agent: 0.3; 0.6 parts of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 70; thickening agent: 0.015, microsphere foaming agent: 0.3; color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
The above examples and comparative examples were tested for bake performance and the results are shown in table 1:
| sample number | Temperature (. degree.C.) | Results |
| Comparative example 1 | 140 | Cracking of coating without bubbling |
| Example two | 140 | Cracking of coating without bubbling |
| EXAMPLE III | 140 | No cracking and bubbling of the coating |
| Example four | 140 | No cracking and bubbling of the coating |
| Comparative example five | 140 | No cracking and bubbling of the coating |
| Comparative example six | 140 | Bubbling and cracking of the coating |
| Comparative example seven | 140 | Bubbling and cracking of the coating |
| Comparative example eight | 140 | Bubbling and cracking of the coating |
| Comparative example No. nine | 140 | Bubbling and cracking of the coating |
| Comparative example ten | 140 | Bubbling and cracking of the coating |
| Comparative example eleven | 140 | Bubbling and cracking of the coating |
| Example twelve | 140 | No cracking and bubbling of the coating |
| EXAMPLE thirteen | 140 | No cracking and bubbling of the coating |
| Example fourteen | 140 | No cracking and bubbling of the coating |
| Example fifteen | 140 | No cracking and bubbling of the coating |
| Example sixteen | 140 | No cracking and bubbling of the coating |
| Example seventeen | 140 | No cracking and bubbling of the coating |
TABLE 1
The damping performance of the above examples and comparative examples was tested, and the test results are shown in table 2:
according to the test detection, when the proportion of the emulsion to the filler is more than 30:60, the damping coating prepared by the method is extremely easy to bulge in the baking process, the perfect baking effect cannot be achieved, and when the proportion of the total content of the emulsion to the filler is less than 20:70, cracks are formed in the baking and curing process due to the fact that the resin is difficult to coat the filler; different degrees of bulging or cracking also occur during baking when the acrylic emulsion content in the emulsion is less than or greater than 30% of the total emulsion content.
Therefore, the damping coating has extremely high requirements on materials, and the water-based damping coating with perfect baking result and good damping performance can be obtained only by accurate proportion.
Comparative example 18
1) Preparing the following components in parts by weight: acrylic resin emulsion: 25, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 6; defoaming agent: 0.3; 0.5 of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 65; thickening agent: 0.015, microsphere foaming agent: 0.4; color paste: 0.5; polyether polyol: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
As shown in FIG. 1 and FIG. 2, the test graphs of the products of the water-based damping paint obtained in example 12 and comparative example 18 after the 140 degree baking test are respectively shown, it is obvious from the graphs that the products after the test in example 12 have no bulge cracking, while the test products in comparative example 18 have obvious cracking, and the test products in comparative example 18 bulge about 35 times in the area of 150 x 80mm by statistics, so that the modified starch is an essential component of the water-based damping paint of the invention.
Comparative example 19
1) Preparing the following components in parts by weight: acrylic resin emulsion: 25, wherein the acrylic resin emulsion contains 30% of pure acrylic emulsion and has a glass transition temperature Tg of 0 ℃; deionized water: 6; defoaming agent: 0.3; 0.5 of a dispersant; calcium carbonate powder: phi is 15-50 mu m, 65; thickening agent: 0.015, color paste: 0.5; polyether polyol: 1.5; modified starch: 1.5;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 500rpm for stirring for 5 minutes;
3) adding calcium carbonate powder and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
4) adding the color paste into a stirring container, starting a stirrer, and regulating the speed to 1000rpm for stirring for 10 minutes;
5) adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1500rpm to stir for 10 minutes;
6) adding the defoaming agent into a stirring container, starting a stirrer, regulating the speed to 800rpm, and stirring for 10 minutes to obtain the damping coating.
As shown in FIG. 1 and FIG. 3, the product test charts of the 140 degree baking test of the water-based damping coating products obtained in example 12 and comparative example 19 are shown respectively, and it is obvious from the product test charts that the product after the test of example 12 has no bulge cracking, and the product after the test of comparative example 19 has a certain cracking condition, so that the microsphere foaming agent is a necessary raw material in the application.
Example 20
The filler is calcium carbonate, the ratio of the acrylic resin emulsion to the filler is 20:70-30:60, the water-based damping coating is prepared according to the first technical scheme, the product test graphs shown in figures 4-8 are obtained by changing the particle size of the filler, and the results are counted in the following table 3,
| serial number | Particle size (um) | Experimental results |
| A | 10 | Bulge |
| II | 15 | Without bulge cracking |
| III | 35 | Without bulge cracking |
| Fourthly | 50 | Without bulge cracking |
| Five of them | 65 | Cracking of |
The tests show that the particle size of the filler also influences the baking performance of the water-based damping coating, and the particle size is too small, so that the swelling occurs, and the cracking occurs when the particle size is too large.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been described herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention; the foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (9)
1. A preparation method of water-based damping paint suitable for being baked at 140 ℃ is characterized by comprising the following steps:
1) preparing the following components in parts by weight: acrylic resin emulsion: 20-30, the glass transition temperature Tg is-10-20 ℃; deionized water: 3-6; defoaming agent: 0.1-0.4; 0.4-0.9 of dispersant; calcium carbonate powder or mica powder: the grain size range is 15-50 μm, 50-80; thickening agent: 0.01-0.02; microsphere foaming agent: 0.1-0.5; color paste: 0.5; polyether polyol: 1-2; modified starch: 1-2;
2) placing the acrylic resin emulsion, deionized water, a defoaming agent, a foaming agent, a dispersing agent and polyether polyol into a stirring container, starting a stirrer, and regulating the speed to 450-;
3) adding calcium carbonate powder or mica powder with the particle size range of 15-50 mu m and modified starch filler into a stirring container, starting a stirrer, and regulating the speed to 800-1200rpm for stirring for 8-12 minutes;
4) adding the color paste into a stirring container, starting the stirrer, and regulating the speed to 800-
5) Adding the thickening agent into a stirring container, starting a stirrer, and regulating the speed to 1300-;
6) adding the defoaming agent into a stirring container, starting the stirrer, and regulating the speed to 700 and 900rpm for stirring for 8-12 minutes to obtain the damping coating.
2. The method for preparing the water-based damping paint suitable for being baked at 140 ℃ as claimed in claim 1, wherein the acrylic resin emulsion is pure acrylic emulsion or a mixture of pure acrylic and styrene-acrylic, the proportion of pure acrylic is not less than 30% of the whole emulsion content, and the solid content of the emulsion is 50%.
3. The preparation method of the water-based damping paint suitable for being baked at 140 ℃ as claimed in claim 2, wherein the pure acrylic emulsion calcium comprises butyl acrylate, methyl acrylate and methacrylic acid, and the ionic stability of the pure acrylic emulsion calcium meets the calcium ionic stability of 0.2% -0.5% cacl2 concentration.
4. The preparation method of the water-based damping paint suitable for being baked at 140 ℃ as claimed in claim 3, wherein the styrene-acrylic emulsion main monomer is styrene or butyl acrylate.
5. The method for preparing the water-based damping coating suitable for being baked at 140 ℃ according to claim 1, wherein the defoaming agent is a mineral oil type defoaming agent.
6. The preparation method of the water-based damping paint suitable for being baked at 140 ℃ as claimed in claim 1, wherein the dispersant is a carboxylate copolymer type dispersant.
7. The preparation method of the water-based damping paint suitable for being baked at 140 ℃ as claimed in claim 1, wherein the thickener is a non-associative alkali swelling thickener, the main component of which is polyacrylate, ASE for short, and belongs to an anionic thickener.
8. The method for preparing the waterborne damping coating suitable for being baked at 140 ℃ as claimed in claim 1, wherein the microsphere foaming agent has a core-shell structure, the shell is a thermoplastic acrylic resin polymer, and the core is spherical plastic particles consisting of alkane gas.
9. The method for preparing the water-based damping paint suitable for being baked at 140 ℃ as claimed in claim 1, wherein the polyether polyol is polyether polyol with a boiling point of 187-233 ℃.
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