A kind of salt spray resistant vinylidene chloride copolymer latex

A technology of copolymer latex and vinylidene chloride, which is applied in the field of copolymer latex of vinylidene chloride, vinyl chloride, acrylate and acrylamide, which can solve the problem of not being able to keep transparent and colorless for a long time, poor color stability, easy film Discoloration and other problems, to achieve the effect of improving storage stability, strong adhesion, and uniform particle size

Active Publication Date: 2018-01-05
贝尔(深圳)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above patents all involve comonomers to modify polyvinylidene chloride, but the latex still has dehydrochlorination reaction, which is easy to change color and has poor color stability. The coated film is easy to change color and foam, and cannot remain transparent for a long time Colorless state, the prior art has not been able to solve this problem well

Method used

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  • A kind of salt spray resistant vinylidene chloride copolymer latex
  • A kind of salt spray resistant vinylidene chloride copolymer latex
  • A kind of salt spray resistant vinylidene chloride copolymer latex

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Add 500g of deionized water and emulsifier (10g of octylphenol polyoxyethylene ether (X-100)) into a 2L reaction kettle, start stirring, and replace the residual air in the system with high-purity nitrogen until the oxygen content in the kettle is lower than 30ppm; Add 90g of vinyl chloride monomer, 0.2g of potassium persulfate and 3g of sodium bicarbonate into the kettle, and stir for pre-dispersion at room temperature for 25min; Acrylic acid-2-ethylhexyl monomer and 0.8g potassium persulfate, keep the reaction pressure of the reactor at ±0.01MPa of the set polymerization pressure; then add 10g of N-methylolacrylamide monomer dropwise to control the reaction The temperature is 60°C; when the polymerization reaction pressure drops by 0.2 MPa, add 1 g of n-dodecyl mercaptan, stop stirring, lower the reaction temperature, release the remaining gas in the reactor, and discharge to obtain vinylidene chloride copolymer latex. The performance parameters of the prepared vinyli...

Embodiment 2

[0034] Add 500g of deionized water and (10g of octylphenol polyoxyethylene ether (X-100)) into the 2L reaction kettle, start stirring, and replace the residual air in the system with high-purity nitrogen until the oxygen content in the kettle is lower than 30ppm; Add 90g of vinyl chloride monomer, 0.2g of potassium persulfate and 3g of sodium bicarbonate, stir and pre-disperse at room temperature for 25min; the temperature of the reaction kettle is raised to 60°C, increase the stirring speed of the reaction kettle, and add 325g of vinylidene chloride monomer and 76g of acrylic acid- 2-Ethylhexyl ester monomer and 0.8g potassium persulfate, keep the reaction pressure of the reactor at ±0.01MPa of the set polymerization pressure; then add 10g of N-methylolacrylamide monomer dropwise, and control the reaction temperature at 60 °C; when the polymerization reaction pressure drops by 0.2 MPa, add 1 g of n-dodecyl mercaptan, stop stirring, lower the reaction temperature, release the r...

Embodiment 3

[0036] Add 500g of deionized water and emulsifier (10g of octylphenol polyoxyethylene ether (X-100)) into a 2L reaction kettle, start stirring, and replace the residual air in the system with high-purity nitrogen until the oxygen content in the kettle is lower than 30ppm; Add 90g of vinyl chloride monomer, 0.1g of potassium persulfate and 3g of sodium bicarbonate into the kettle, stir and pre-disperse for 25min at room temperature; the temperature of the reaction kettle is raised to 60°C, increase the stirring speed of the reaction kettle, and add 334g of vinylidene chloride monomer and 50g of Acrylic acid-2-ethylhexyl monomer and 0.9g potassium persulfate, keep the reaction pressure of the reactor at ±0.01MPa of the set polymerization pressure; then add 24g of N-methylolacrylamide monomer dropwise to control the reaction The temperature is 60°C; when the polymerization reaction pressure drops by 0.2 MPa, add 1 g of n-dodecyl mercaptan, stop stirring, lower the reaction tempera...

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Abstract

The invention discloses vinyl chloride copolymer latex with salt fog resistance. The polymeric monomer formula, the emulgator formula, polymerization reaction temperature and time, the charging mode and other factors influencing the polymerization reaction are optimized, so that a polymerization method is optimized. The vinyl chloride copolymer latex prepared through the method has excellent storage stability, and is even in grain size distribution and high in adhesive force, and a product coated with the vinyl chloride copolymer latex has excellent water resistance and salt fog resistance.

Description

technical field [0001] The invention relates to a vinylidene chloride copolymer latex, in particular to a salt spray-resistant copolymer latex of vinylidene chloride, vinyl chloride, acrylate and acrylamide. Background technique [0002] In 1932, DOW Chemical Company of the United States began the research on the polymerization of vinylidene chloride, but the softening temperature of vinylidene chloride homopolymer is very close to the decomposition temperature, and it is a crystalline polymer. In order to improve the softening temperature and crystallinity of vinylidene chloride homopolymer, copolymers containing vinyl chloride, acrylate, acrylonitrile, etc. have been successively obtained. In the 1950s, partial chlorine copolymer resins and latexes had their application reports. At that time, latex was mainly used for dip coating paper and coatings. [0003] At present, vinylidene chloride copolymer latex coatings are widely used in food packaging, automobile industry, fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/08C08F214/06C08F220/18C08F220/58C08F2/30C08F2/26C08F2/38
CPCC08F2/26C08F2/30C08F2/38C08F214/08C08F214/06C08F220/1808C08F220/58
Inventor 揭伟
Owner 贝尔(深圳)新材料有限公司
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