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Preparation method of vinyl chloride-vinyl acetate-butyl acrylate copolymer

A technology of butyl acrylate and vinyl acetate, applied in the field of vinyl chloride copolymer synthesis, can solve the problems of environmental pollution of emulsifiers, increasing difficulty of water treatment, etc.

Active Publication Date: 2021-02-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the latex particles of the terpolymer formed by emulsion polymerization have emulsifier molecules adsorbed on the surface to maintain the stability in the water phase. The existence of this layer of emulsifier molecules makes the vinyl chloride-vinyl acetate-butyl acrylate terpolymer The copolymer emulsion can only be used in the coating industry, which limits the application of the terpolymer in other fields; on the other hand, the residual emulsifier brings pollution to the environment and increases the difficulty of water treatment

Method used

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  • Preparation method of vinyl chloride-vinyl acetate-butyl acrylate copolymer
  • Preparation method of vinyl chloride-vinyl acetate-butyl acrylate copolymer

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Experimental program
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Effect test

Embodiment 1

[0067] According to the mass ratio of feed intake vinyl chloride: vinyl acetate: butyl acrylate=85:1:14, the monomer concentration is 25% by mass, 0.1g vinyl acetate, 1.4g butyl acrylate, and 0.5% azobisiso Heptanonitrile and 30 g of n-hexane were added to the reactor, and argon was filled for 15 minutes to replace the air in the reactor; then 8.5 g of vinyl chloride was introduced into the reactor, and the temperature was raised to 56° C. to start polymerization. After reacting for 12 hours, stop the reaction, recover the unreacted vinyl chloride monomer, wash the polymer product with a large amount of solvent, and dry it in vacuum to obtain a vinyl chloride-vinyl acetate-butyl acrylate terpolymer.

[0068] Sample preparation and various performance tests were carried out according to the evaluation method, and the experimental data are shown in Table 1 below.

Embodiment 2

[0070] According to the mass ratio of feed intake vinyl chloride: vinyl acetate: butyl acrylate=70:10:20, the monomer concentration is 25% by mass, 1g vinyl acetate, 2g butyl acrylate, and 0.5% azobisisoheptanonitrile , 30g of n-hexane was added to the reactor, and argon was filled for 15 minutes to replace the air in the reactor; then 7g of vinyl chloride was introduced into the reactor, and the temperature was raised to 56°C to start polymerization. After reacting for 12 hours, stop the reaction, recover the unreacted vinyl chloride monomer, wash the polymer product with a large amount of solvent, and dry it in vacuum to obtain a vinyl chloride-vinyl acetate-butyl acrylate terpolymer.

[0071] Sample preparation and various performance tests were carried out according to the evaluation method, and the experimental data are shown in Table 1 below.

Embodiment 3

[0073] According to the mass ratio of feed intake vinyl chloride: vinyl acetate: butyl acrylate=70:20:10, the monomer concentration is 25% by mass, 2g vinyl acetate, 1g butyl acrylate, and 0.5% azobisisoheptanonitrile , 30g of n-hexane was added to the reactor, and argon was filled for 15 minutes to replace the air in the reactor; then 7g of vinyl chloride was introduced into the reactor, and the temperature was raised to 56°C to start polymerization. After reacting for 12 hours, stop the reaction, recover the unreacted vinyl chloride monomer, wash the polymer product with a large amount of solvent, and dry it in vacuum to obtain a vinyl chloride-vinyl acetate-butyl acrylate terpolymer.

[0074] Sample preparation and various performance tests were carried out according to the evaluation method, and the experimental data are shown in Table 1 below.

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Abstract

The invention relates to a preparation method of a vinyl chloride-vinyl acetate-butyl acrylate terpolymer. The preparation method comprises a step of carrying out precipitation co-polymerization reaction on monomers: vinyl chloride, vinyl acetate and butyl acrylate, and comprises the following steps: 1) adding an initiator, vinyl chloride, vinyl acetate, butyl acrylate and a reaction medium into areaction kettle at one time, and introducing inert gas to replace air in the reaction kettle; 2) starting to stir, pre-stirring for 10-40 minutes at the room temperature, then heating to 30-80 DEG C,and carrying out polymerization reaction; and 3) stopping the reaction after polymerizing for 6-72 hours, recovering unreacted vinyl chloride, and washing, centrifuging and drying the polymerizationproduct by using a reaction medium to obtain the vinyl chloride-vinyl acetate-butyl acrylate terpolymer.

Description

technical field [0001] The invention relates to the field of vinyl chloride copolymer synthesis, in particular to a preparation method of vinyl chloride-vinyl acetate-butyl acrylate copolymer. Background technique [0002] Polyvinyl chloride (PVC) resin is a thermoplastic high polymer formed by free radical polymerization of vinyl chloride monomer (VC). It is one of the five general-purpose resins. Plastic variety. However, due to the molecular structure characteristics of polyvinyl chloride, such as the strong polarity of the C-Cl bond in the molecular chain, PVC is difficult to dissolve in common organic solvents; Defects such as poor heat resistance limit the further application of PVC. [0003] Copolymerization with other monomers is an important means to improve the application performance of PVC. Vinyl chloride-vinyl acetate-butyl acrylate copolymer, due to the introduction of vinyl acetate and butyl acrylate segments into the PVC chain, the terpolymer has good film...

Claims

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Application Information

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IPC IPC(8): C08F214/06C08F218/08C08F220/18C08F2/06
CPCC08F214/06C08F218/08C08F220/1804C08F2/06
Inventor 杨万泰宋长统张先宏
Owner BEIJING UNIV OF CHEM TECH