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A kind of high solid content polyvinyl acetate emulsion and preparation method thereof

A technology of polyvinyl acetate and high solid content, which is applied in the field of high solid content polyvinyl acetate emulsion and its preparation, which can solve the problems that the special requirements cannot be realized, and the solid content of the product is difficult to exceed 65%, so as to achieve fast drying and curing speed , Improved water resistance, slow viscosity response

Active Publication Date: 2020-09-15
SINOPEC SICHUAN VINYLON FACTORY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent has a certain effect on improving the solid content of polyvinyl acetate emulsion with low solid content, the solid content of the final product is also difficult to break through 65%, and some special requirements in the industry cannot be realized (such as rapid coating, etc.)

Method used

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  • A kind of high solid content polyvinyl acetate emulsion and preparation method thereof
  • A kind of high solid content polyvinyl acetate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 27.1 parts of hydroxyethyl cellulose aqueous solution with a dissolved concentration of 4% into the reactor, start stirring, and add 2.8 parts X-305 (nonylphenol polyoxyethylene ether) and 0.3 parts of zinc formaldehyde sulfoxylate, and start to cool down at the same time. When the temperature of the reaction kettle drops to 40°C, add 3 parts of vinyl acetate monomer, and then heat up; when the temperature reaches 52°C, add 0.6 parts of oxidant, and then the reaction temperature begins to rise due to the exothermic polymerization, when the temperature reaches 80°C, Start to add 57 parts of monomer and 2 parts of oxidant dropwise, and the dropping time is 60 minutes. After the continuous addition of monomers, continue to drop 1.4 parts of oxidizing agent, and the dropping time is 20 minutes. After completion, the temperature of the reactor is raised to 85°C Heat preservation for 30 minutes; after the heat preservation is completed, the temperature of the reaction ke...

Embodiment 2

[0053] Add 26.5 parts of dissolved hydroxymethylcellulose aqueous solution with a concentration of 3.4% into the reactor, start stirring, add 2 parts of octylphenol polyoxyethylene ether and 0.25 part of sodium ascorbate, and start to cool down at the same time. When the temperature of the reaction kettle drops to 40°C, add 1.12 parts of vinyl acetate monomer, and then raise the temperature; when the temperature reaches 58°C, add 0.35 parts of oxidant, and then the reaction temperature begins to rise due to the exothermic polymerization. When the temperature reaches 80°C, Start to add 54.88 parts of monomer and 1.75 parts of oxidizing agent dropwise, and the dropping time is 70 minutes. After the continuous addition of monomers, continue to drop 1.4 parts of oxidizing agent, and the dropping time is 20 minutes. After completion, the temperature of the reactor is raised to 85°C Heat preservation for 30 minutes; after the heat preservation is completed, the temperature of the rea...

Embodiment 3

[0058] Add 29.2 parts of 4% hydroxypropyl cellulose aqueous solution into the reactor, start stirring, add 2.2 parts of fatty alcohol polyoxyethylene ether and 0.35 part of zinc formaldehyde sulfoxylate, and start to cool down at the same time. When the temperature of the reaction kettle drops to 40°C, add 5.04 parts of vinyl acetate monomer, and then raise the temperature; when the temperature reaches 50°C, add 0.9 parts of oxidant, and then the reaction temperature begins to rise due to the exothermic polymerization. When the temperature reaches 80°C, Start to add 57.96 parts of monomer and 2.7 parts of oxidizing agent dropwise, and the dropping time is 60 minutes. After the continuous addition of monomers, continue to drop 0.9 parts of oxidizing agent, and the dropping time is 20 minutes. After completion, the temperature of the reactor is raised to 85°C Heat preservation for 30 minutes; after the heat preservation is completed, the temperature of the reaction kettle is lowe...

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Abstract

The present invention discloses a high solid content polyvinyl acetate emulsion, which is prepared from vinyl acetate, a protection colloid, an emulsifier, an oxidizing agent, a reducing agent, a pH value adjuster, deionized water and a plasticizer. According to the present invention, the high solid content polyvinyl acetate emulsion has the solid content of 66-70%, has the viscosity of less than 3000 mPa.s, has advantages of rapid drying and curing rate and good water resistance, and is widely used in the manufacturing fields of paper processing, coating material decoration, wood processing, nonwoven fabrics, carpets, and the like; and by adding the plasticizer, the viscosity response is slow, such that the product is especially used for high-speed cigarette glues and high-speed laminating. The invention further discloses a preparation method of the emulsion, wherein the method has characteristics of simple operation and easily available raw materials, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a polyvinyl acetate emulsion, in particular to a polyvinyl acetate emulsion with high solid content and a preparation method thereof. Background technique [0002] The spherical particle emulsion obtained by ordinary emulsion polymerization has a solid content of up to 74% in theory. At present, the solid content of domestic polyvinyl acetate emulsion is generally 30%-50%, and the viscosity is mostly above 10000mPa·s. Generally, when the solid content exceeds 50%, the emulsion will increase the number of latex particles and enhance the interaction between particles due to the increase of solid content, resulting in a sharp increase in the viscosity of the emulsion, even reaching hundreds of thousands. High solid content emulsion can increase the curing speed of the emulsion and reduce the transportation cost, but as the viscosity of the emulsion increases, some application properties of the emulsion will be affected, such as r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F118/08C08F2/30
CPCC08F2/30C08F118/08
Inventor 曹勇罗丽华刘斌张波邱萱
Owner SINOPEC SICHUAN VINYLON FACTORY
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