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Carboxyl-containing vinyl chloride copolymer resin and preparation method thereof

A vinyl chloride and copolymer technology, applied in the field of polymer synthesis, can solve the problems of increasing the difficulty of low-molecular-weight carboxy-based PVC copolymer resins and increasing polymerization costs, etc.

Active Publication Date: 2021-03-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current emulsion polymerization or suspension polymerization mainly synthesizes low-molecular-weight polyvinyl chloride copolymer resins by adding chain transfer agents or high-temperature methods, which increases the difficulty of synthesizing low-molecular-weight carboxy-based PVC copolymer resins and increases the polymerization cost.

Method used

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  • Carboxyl-containing vinyl chloride copolymer resin and preparation method thereof
  • Carboxyl-containing vinyl chloride copolymer resin and preparation method thereof
  • Carboxyl-containing vinyl chloride copolymer resin and preparation method thereof

Examples

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preparation example Construction

[0057]

[0058] The preparation method of carboxyl vinyl chloride copolymer resin of the present invention, it comprises following two steps:

[0059] 1) adding a free radical initiator, vinyl chloride, monomers represented by formula (2) and compositions thereof, and a reaction medium into the reactor, and performing free radical precipitation copolymerization under mechanical stirring;

[0060] 2) The obtained polymer product is subjected to centrifugation, washing and drying.

[0061] The precipitation polymerization method of the present invention is a heterogeneous polymerization method. Specifically, it means that the monomer and initiator can be dissolved in the reaction medium, but the generated polymer cannot be dissolved in the reaction medium, so the generated polymer precipitates out from the reaction system to form particles.

[0062] The selection principle of the reaction medium of the present invention is: the reaction medium has good dissolving ability to t...

Embodiment

[0074] The present invention will be specifically described by the following examples, but the present invention is not limited to these examples.

[0075]

[0076] Composition ratio, particle size and morphology, solubility, number average molecular weight, etc. of each structural unit of carboxyl-containing vinyl chloride copolymer resin.

[0077] (composition ratio)

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Abstract

The present invention relates to a carboxyl-containing vinyl chloride copolymer resin. This carboxyl-containing vinyl chloride copolymer resin has a chemical structure represented by formula (1): avinyl chloride based structural unit (a) and a structural unit (b) based on a monomer represented by a formula (2) are included, CR1R2=CR3R4COOH (2) (in formula (2), R1 is selected from hydrogen, methyl,benzene ring, R2 is selected from hydrogen, methyl, a linear or branched alkyl group having 1-15 carbon atoms, R3 is selected from hydrogen and methyl, and R4 is selected from linear or branched alkyl or alkylene with the carbon number of 0-15. The content of the structural unit (b) is 1-20% by mass relative to the total mass of the carboxyl-containing vinyl chloride copolymer resin.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and relates to a vinyl chloride copolymer and a method for preparing the vinyl chloride copolymer. More precisely, it relates to a carboxyl-containing vinyl chloride copolymer and a method for preparing carboxyl-containing vinyl chloride copolymer resin by radical precipitation polymerization. Background technique [0002] Polyvinyl chloride (PVC) is a polymer variety with excellent performance, low price, wide application and large market capacity. The polymer obtained by copolymerizing vinyl chloride monomer with one or more other monomers is called vinyl chloride copolymer. Through copolymerization with other monomers, the processability, solubility and heat resistance of polyvinyl chloride can be improved. sex etc. Among them, vinyl chloride copolymers containing carboxyl groups have a wide range of applications, for example, in inks and coatings, they can be used as blended resins to impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F220/06C08F2/06
CPCC08F214/06C08F220/06C08F2/06
Inventor 杨万泰宋长统张先宏舒泓艺马育红
Owner BEIJING UNIV OF CHEM TECH
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