Quick-drying core-shell structure hydroxy acrylic emulsion, preparation method and application thereof

A technology of structural hydroxyacrylic acid and methyl methacrylate, which is applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of high VOC content, high curing agent price, and complicated preparation process, and achieve gloss and vivid image The effect of high strength, faster drying speed and simple production process

Active Publication Date: 2020-04-07
广州化工研究设计院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the coating prepared by emulsion type hydroxypropyl resin contains more hydrophilic substances (such as: emulsifier, dispersant, wetting agent, etc.), and the latent heat of evaporation of water is relatively high, which makes the drying speed of the coating film very slow. slow
At present, the methods for improving the drying speed of coatings mainly include the following two methods: 1) increasing the amount of isocyanate curing agent added, but the price of curing agent is very high, and the increase in the amount of the curing agent will lead to a substantial increase in th

Method used

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  • Quick-drying core-shell structure hydroxy acrylic emulsion, preparation method and application thereof
  • Quick-drying core-shell structure hydroxy acrylic emulsion, preparation method and application thereof
  • Quick-drying core-shell structure hydroxy acrylic emulsion, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A quick-drying core-shell structure hydroxyacrylic acid emulsion, which is obtained by performing two consecutive emulsion polymerizations of core layer monomers and shell layer monomers with a mass ratio of 1:1;

[0046] The composition of the nuclear layer monomer is shown in the following table:

[0047] Table 1 Composition of nuclear layer monomers

[0048] raw material Mass percentage (%) Methyl methacrylate 61 Styrene 15 Butyl acrylate 22.8 Ethylene glycol diacrylate 1.2

[0049] The composition of the shell monomer is shown in the table below:

[0050] Table 2 Composition table of shell monomer

[0051] raw material Mass percentage (%) Methyl methacrylate 6 Styrene 15 Butyl acrylate 44 Methacrylate 4 Hydroxyethyl methacrylate 23 Isobornyl Acrylate 8

[0052] The preparation method of the above-mentioned quick-drying type core-shell structure hydroxyacrylic acid emulsion c...

Embodiment 2

[0062] A quick-drying core-shell structure hydroxyacrylic acid emulsion, which is obtained by performing two consecutive emulsion polymerizations of core layer monomers and shell layer monomers with a mass ratio of 1:9;

[0063] The composition of the nuclear layer monomer is shown in the following table:

[0064] Table 3 Composition of nuclear layer monomers

[0065] raw material Mass percentage (%) Methyl methacrylate 94 Butyl acrylate 6

[0066] The composition of the shell monomer is shown in the table below:

[0067] The composition table of table 4 shell monomer

[0068] raw material Mass percentage (%) Methyl methacrylate 36.1 Butyl acrylate 38.8 acrylic acid 0.6 Hydroxypropyl Acrylate 16.7 Hydroxyethyl Acrylate 5.6 Isobornyl Methacrylate 2.2

[0069] The preparation method of the above-mentioned quick-drying type core-shell structure hydroxyacrylic acid emulsion comprises the following ste...

Embodiment 3

[0079] A quick-drying type core-shell structure hydroxyacrylic acid emulsion, which is obtained by two consecutive emulsion polymerizations of core layer monomers and shell layer monomers with a mass ratio of 3:7;

[0080] The composition of the nuclear layer monomer is shown in the following table:

[0081] Table 5 Composition of nuclear layer monomers

[0082] raw material Mass percentage (%) Methyl methacrylate 77.7 Styrene 6.6 Butyl acrylate 14.7 Ethylene glycol diacrylate 1

[0083] The composition of the shell monomer is shown in the table below:

[0084] The composition table of table 6 shell monomer

[0085]

[0086]

[0087] The preparation method of the above-mentioned quick-drying type core-shell structure hydroxyacrylic acid emulsion comprises the following steps:

[0088] 1) uniformly dispersing the core layer monomer and the alkylphenol polyoxyethylene ether sulfate with water to obtain a pre-emulsion A;

[0089] 2...

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Abstract

The invention discloses a quick-drying core-shell structure hydroxy acrylic emulsion, a preparation method and application thereof. The quick-drying core-shell structure hydroxy acrylic emulsion is obtained by two continuous emulsion polymerization on a core layer monomer and a shell layer monomer in a mass ratio of 1:(1-9), the core layer monomer is composed of methyl methacrylate, styrene, butylacrylate and ethylene glycol diacrylate, and the shell layer monomer is composed of methyl methacrylate, styrene, butyl acrylate, acrylic acid or/and methacrylic acid, hydroxypropyl acrylate or/and hydroxyethyl methacrylate, hydroxyethyl acrylate, isobornyl acrylate or/and isobornyl methacrylate or/and cyclohexyl acrylate or/and cyclohexyl methacrylate. A paint prepared from the hydroxyl acrylicemulsion provided by the invention has high drying speed, a formed paint film has high compactness, good corrosion resistance, and high glossiness and distinctness of image, and the emulsion can be applied to quick-drying acrylic polyurethane paint.

Description

technical field [0001] The invention relates to a quick-drying type core-shell structure hydroxyacrylic acid emulsion and its preparation method and application. Background technique [0002] Two-component acrylic polyurethane coatings have good decorative properties and anti-corrosion properties, and are widely used in heavy-duty anti-corrosion coatings, automotive coatings, wood coatings and other fields. In recent years, under the pressure of environmental protection, water-based acrylic polyurethane coatings have gradually replaced solvent-based acrylic polyurethane coatings, and have been widely promoted and applied. [0003] The two-component water-based acrylic polyurethane coating is composed of water-based hydroxyl acrylic resin (referred to as "hydroxypropyl resin") and isocyanate curing agent. Waterborne hydroxypropyl resin includes water dispersion type and emulsion type. Water dispersion type hydroxypropyl resin is a water dispersion formed by dispersing acryli...

Claims

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Application Information

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IPC IPC(8): C08F265/06C08F220/18C08F220/20C09D175/04C08G18/62
CPCC08F265/06C09D175/04C08G18/6254C08F220/20
Inventor 张小平李坚
Owner 广州化工研究设计院有限公司
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