Solvent-resistant acrylic emulsion and preparation method thereof

An acrylic emulsion and solvent-resistant technology, applied in the field of solvent-resistant acrylic emulsion and its preparation, can solve the problems of difficult solvent resistance of water-based acrylic emulsion, increase the distance between polymer segments, reduce the entanglement of segments, etc. Scrub resistance and solvent resistance, improve solvent resistance, and improve the effect of product cost performance

Inactive Publication Date: 2018-09-04
佛山市顺德区巴德富实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The film-forming mechanism of water-based acrylic emulsion is formed by the accumulation and extrusion deformation of latex particles. After the emulsion film is formed, when the polar solvent is dropped on the emulsion film, the polar small molecule solvent enters the polymer network. In the middle, it will increase the segment spacing between polymers, reduce the entanglement of the segments, increase the mobility of the segments, and cause the volume change of the system. Therefore, when a large amount of polar small molecule solvent enters the dense polymer material In the interior, the polymer material itself will swell or dissolve, so that the original structure will be destroyed, cracks or deformation will occur, which will eventually affect the performance of the emulsion
[0003] Therefore, it is necessary to develop a solvent-resistant acrylic emulsion. There is currently no product with this function on the market. The solvent resistance of water-based acrylic emulsion is a technical problem in the emulsion industry.

Method used

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  • Solvent-resistant acrylic emulsion and preparation method thereof

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[0031] In addition, the present invention also provides a method for preparing the solvent-resistant acrylic emulsion, which specifically includes the following steps:

[0032] 1) Pre-emulsification: under normal temperature and pressure, mix the anionic emulsifier and 30-40 parts of water in the pre-emulsification tank, fully stir and dissolve, and then add the styrene, butyl acrylate and acrylic acid in the formula to obtain pre-emulsion;

[0033] 2) Polymerization: add 120-170 parts of water to the bottom of the reaction kettle, heat up to 80-90°C, stir for 20-40 minutes, take 5%-10% of the pre-emulsion obtained in step 1) as the seed emulsion, and put it in at one time At the bottom of the reaction kettle, take 0.1-0.2 parts of the initiator, put it into the bottom of the kettle at one time, react and keep it warm for 10-30 minutes, after the seed emulsion is formed, add the pre-emulsion obtained in the remaining step 1) and 0.05-0.6 parts Initiator, the dropping time is ...

Embodiment 1

[0038] A solvent-resistant acrylic emulsion, comprising the following components in parts by mass: 180 parts of water, 50 parts of styrene, 40 parts of butyl acrylate, 0.5 parts of acrylic acid, 1 part of anionic emulsifier, 1 part of functional monomer, and initiator 0.2 parts, 0.1 parts of oxidizing agent, and 0.1 parts of reducing agent.

[0039] The anionic emulsifier is sodium lauryl sulfate.

[0040] The functional monomer is vinyltrimethoxysilane.

[0041] The initiator is sodium persulfate.

[0042] The oxidizing agent adopts organic peroxide.

[0043] The reducing agent is sodium binitrite.

[0044] In addition, the present invention also provides a method for preparing the solvent-resistant acrylic emulsion, which specifically includes the following steps:

[0045] 1) Pre-emulsification: Under normal temperature and pressure, mix the anionic emulsifier and 30 parts of water in the pre-emulsification tank, fully stir and dissolve, and add the styrene, butyl acryla...

Embodiment 2

[0055] A solvent-resistant acrylic emulsion, comprising the following components in parts by mass: 220 parts of water, 55 parts of styrene, 45 parts of butyl acrylate, 3 parts of acrylic acid, 3 parts of anionic emulsifier, 3 parts of functional monomer, initiator 0.6 parts, 0.3 parts of oxidizing agent, and 0.3 parts of reducing agent.

[0056] The anionic emulsifier is sodium dodecylbenzenesulfonate.

[0057] The functional monomer is methacryloxytrimethoxysilane.

[0058] The initiator is ammonium persulfate.

[0059] The oxidizing agent adopts organic peroxide.

[0060] The reducing agent is vitamin C.

[0061] In addition, the present invention also provides a method for preparing the solvent-resistant acrylic emulsion, which specifically includes the following steps:

[0062] 1) Pre-emulsification: Under normal temperature and pressure, mix the anionic emulsifier and 35 parts of water in the pre-emulsification tank, fully stir and dissolve, and add the styrene, butyl...

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Abstract

The invention discloses a solvent-resistant acrylic emulsion, belonging to the field of acrylic emulsions. The solvent-resistant acrylic emulsion comprises 180-260 parts of water, 50-60 parts of styrene, 40-50 parts of butyl acrylate, 0.5-5 parts of acrylic acid, 1-5 parts of an anionic emulsifier, 1-5 parts of a functional monomer, 0.2-1 part of an initiator, 0.1-0.5 part of an oxidant and 0.1-0.5 part of a reducing agent. The preparation method for the solvent-resistant acrylic emulsion comprises the following steps: 1) pre-emulsification; 2) polymerization; and 3) post-elimination. The solvent-resistant acrylic emulsion provided by the invention is improved in scrub resistance and solvent resistance while having the basic performance of good adhesion, hardness, water resistance, salt water resistance, salt spray resistance, scrub resistance and the like, so the application scope of the acrylic emulsion is broadened, the application properties of the coating are enhanced, the basic performance of the emulsion is substantively improved, and the cost performance of the emulsion is greatly improved.

Description

technical field [0001] The invention relates to an acrylic emulsion, in particular to a solvent-resistant acrylic emulsion and a preparation method thereof, belonging to the field of acrylic emulsion. Background technique [0002] The film-forming mechanism of water-based acrylic emulsion is formed by the accumulation and extrusion deformation of latex particles. After the emulsion film is formed, when the polar solvent is dropped on the emulsion film, the polar small molecule solvent enters the polymer network. In the middle, it will increase the segment spacing between polymers, reduce the entanglement of the segments, increase the mobility of the segments, and cause the volume change of the system. Therefore, when a large amount of polar small molecule solvent enters the dense polymer material When it is inside, the polymer material itself will swell or dissolve, so that the original structure will be destroyed, cracks or deformation will occur, which will eventually affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F230/08C08F2/26
CPCC08F2/26C08F212/08C08F220/1804C08F220/06C08F230/08
Inventor 成煬霈李晨鸽罗志斌
Owner 佛山市顺德区巴德富实业有限公司
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