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A kind of styrene-acrylic emulsion with excellent freeze-thaw stability and its preparation method and application

A technology of freeze-thaw stability and styrene-acrylic emulsion, applied in latex paint, etc., can solve the problems of increasing the VOC content of paint products, poor freeze-thaw stability, and poor freeze-thaw resistance, so as to promote freeze-thaw stability and stabilize the polymerization process , the effect of high conversion rate

Active Publication Date: 2016-05-18
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Styrene-acrylic emulsions and their coatings have the disadvantage of poor freeze-thaw resistance because they use water as the dispersion medium, that is, during transportation and storage in low-temperature environments, they often deteriorate due to the inability to restore fluidity after freezing and thawing. cause huge economic losses
At present, the problem of poor freeze-thaw stability is mainly solved by adding antifreeze agents (see patents US20090186968A1, US6933415B2 and CN103205172A, etc.), but the added antifreeze agents are generally high VOC solvents, which will inevitably increase the VOC content of coating products

Method used

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  • A kind of styrene-acrylic emulsion with excellent freeze-thaw stability and its preparation method and application
  • A kind of styrene-acrylic emulsion with excellent freeze-thaw stability and its preparation method and application
  • A kind of styrene-acrylic emulsion with excellent freeze-thaw stability and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A styrene-acrylic emulsion with excellent freeze-thaw stability. The styrene-acrylic emulsion is prepared by a core-shell emulsion polymerization method. The raw material components and amounts used are as follows:

[0038] Polymerization main monomer: 60g styrene (St), 40g butyl acrylate (BA);

[0039] Other materials: 2g methacrylic acid (MAA), 0.2g functional polymerized monomer (COPS-2), 0.75g anion-nonionic composite emulsifier (KL-70), 0.5g ammonium persulfate (APS), 0.4g carbonic acid Sodium hydrogen, 100g deionized water;

[0040] Among them, the functional polymerized monomer (COPS-2) is a functional polymerized monomer conforming to the general structural formula IV, and the specific structural formula is:

[0041] Anion-nonionic composite emulsifier (KL-70) is an anion-nonionic composite emulsifier conforming to the general structural formula III. The specific structural formula is:

[0042] The preparation method of the styrene-acrylic emulsion with excellent freez...

Embodiment 2

[0048] A styrene-acrylic emulsion with excellent freeze-thaw stability. The styrene-acrylic emulsion is prepared by a core-shell emulsion polymerization method. The raw material components and amounts used are as follows:

[0049] Polymerization main monomer: 60g styrene (St), 40g butyl acrylate (BA);

[0050] Other materials: 2g methacrylic acid (MAA), 0.6g functional polymerized monomer (COPS-2), 0.75g anion-nonionic composite emulsifier (KL-70), 0.5g ammonium persulfate (APS), 0.4g Sodium bicarbonate, 100g deionized water;

[0051] Wherein, the functional polymerized monomer (COPS-2) is the same functional polymerized monomer as described in Example 1;

[0052] The anionic-nonionic composite emulsifier (KL-70) is the same anionic-nonionic composite emulsifier as described in Example 1.

[0053] The preparation method of the styrene-acrylic emulsion with excellent freeze-thaw stability is as follows:

[0054] (1) Add sodium bicarbonate, anionic-nonionic composite emulsifier (KL-70), 2...

Embodiment 3

[0059] A styrene-acrylic emulsion with excellent freeze-thaw stability. The styrene-acrylic emulsion is prepared by a core-shell emulsion polymerization method. The raw material components and amounts used are as follows:

[0060] Polymerization main monomer: 60g styrene (St), 40g butyl acrylate (BA);

[0061] Other materials: 2g methacrylic acid (MAA), 1g functional polymerized monomer (COPS-2), 0.75g anion-nonionic composite emulsifier (KL-70), 0.5g ammonium persulfate (APS), 0.4g carbonic acid Sodium hydrogen, 100g deionized water;

[0062] Wherein, the functional polymerized monomer (COPS-2) is the same functional polymerized monomer as described in Example 1;

[0063] The anionic-nonionic composite emulsifier (KL-70) is the same anionic-nonionic composite emulsifier as described in Example 1.

[0064] The preparation method of the styrene-acrylic emulsion with excellent freeze-thaw stability is as follows:

[0065] (1) Add sodium bicarbonate, anionic-nonionic composite emulsifier (...

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Abstract

The invention belongs to the field of coatings, and discloses a styrene-acrylic emulsion with excellent freeze-thaw stability as well as a preparation method and an application thereof. The styrene-acrylic emulsion contains an anion-nonionic compound emulsifier of a specific type and content and a functional polymerization monomer, and also has a glass-transition temperature of a particle shell layer within a specific range. The styrene-acrylic emulsion is prepared by adopting a core-shell emulsion polymerization method, wherein the excellent freeze-thaw stability of the styrene-acrylic emulsion with is realized by controlling the usage amount and the adding mode of the functional polymerization monomer and controlling the core forming mode of emulsion particles. The styrene-acrylic emulsion has the excellent freeze-thaw stability, and a high-PVC (Poly Vinyl Chloride) interior wall coating product prepared by utilizing the styrene-acrylic emulsion also has the excellent freeze-thaw stability under the condition that no antifreeze agent is added.

Description

Technical field [0001] The invention belongs to the field of coatings, and specifically relates to a styrene-acrylic emulsion with excellent freeze-thaw stability, and a preparation method and application thereof. Background technique [0002] Paint is a decorative material closely related to people’s daily life. Interior wall paint is an important part of paint. However, volatile organic compounds (VOC) in paint are an important type of environmental pollutant that poses a great impact on human health. Threatened. The Chinese national standard GB18582-2008 "Interior Decoration Materials-Limits of Hazardous Substances in Interior Wall Coatings" defines VOC as "any organic compound with an initial boiling point lower than or equal to 250°C under a standard pressure of 101.3kPa." At present, zero-VOC or low-VOC interior wall coatings have become mainstream coating products in European and American countries. The European Indoor Air Quality Joint Action Committee has formulated ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F220/58C08F2/26C08F2/30C09D125/14C09D5/02
Inventor 沈慧芳沈大谱杨之卓刘薇薇
Owner SOUTH CHINA UNIV OF TECH
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