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Process for preparing cross-linking maleic anhydride-vinyl acetate copolymer

A technology of vinyl acetate and maleic anhydride, which is applied in the polymerization field of preparing crosslinked maleic anhydride-vinyl acetate polymer particles, can solve the problems that the preparation method has not been reported, and achieve fast reaction rate, simple process system, easy separation effect

Inactive Publication Date: 2009-01-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of cross-linked maleic anhydride-vinyl acetate cross-linked copolymer particles has not been reported so far

Method used

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  • Process for preparing cross-linking maleic anhydride-vinyl acetate copolymer
  • Process for preparing cross-linking maleic anhydride-vinyl acetate copolymer
  • Process for preparing cross-linking maleic anhydride-vinyl acetate copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061]MAn 4.903g, VAc4.3045g; Initiator is dibenzoyl peroxide (BPO), 0.0969g; Crosslinking agent diethylene glycol dimethacrylate (EGDMA), 0.0991g; Medium is butyl acetate, 43mL. Adopt water-bath heating, react 4 hours under the temperature of 80 ℃, obtain the average particle diameter (Dn) of crosslinked PMV copolymer microsphere, dispersion coefficient (U) and polymerization yield (C p ), the results are shown in Table 1, and the scanning electron micrographs of cross-linked polymers are as follows figure 1 shown.

Embodiment 2

[0063] MAn 4.903g, VAc4.3045g; initiator is di-tert-butyl peroxide, 0.0018g; crosslinking agent diethylene glycol diethyl acrylate, 0.2973g; medium is amyl acetate, 22mL. Adopt water-bath heating, react 8 hours under the temperature of 80 ℃, obtain the average particle diameter (Dn) of crosslinked PMV copolymer microsphere, dispersion coefficient (U) and polymerization yield (C p ), the results are shown in Table 1

Embodiment 3

[0065] MAn 4.903g, VAc4.3045g; initiator is dicumyl peroxide, 0.00469g; crosslinking agent diethylene glycol diethyl acrylate, 0.4955g; medium is ethyl butyrate, 43mL. Adopt water-bath heating, react 6 hours under the temperature of 80 ℃, obtain the average particle diameter (Dn) of cross-linked PMV copolymer microsphere, dispersion coefficient (U) and polymerization yield (C p ), the results are shown in Table 1

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Abstract

A cross linking maleic anhydride-vinyl acetate copolymer preparation method belongs to the field of copolymers. The invention is characterized in that a polymerization reaction system comprises a reactive monomer, cross linking agents, initiators and medium; the reactive monomer is maleic anhydride and acetate vinyl, and the mol ratio is from 1:9 to 9:1; the mass concentration of the monomer in the polymerization system is from 0.45 percent to 45 percent; the cross linking agents being used are polyfunctionality organic molecules; the initiators being used are organic peroxides or azo compounds; the mass of the initiator is 0.02 percent to 1 percent of the total monomers; the rest is the medium; the copolymerization lasts 4 to 24 hours. The invention does not use stabilizers, does not introduce impurities such as surface active agents, etc. into the surfaces of particles to affect the surface properties of the particles; the preparation process is simple and is easy to control, and the invention can save the cost and is environment-friendly.

Description

technical field [0001] The invention relates to a polymerization method for preparing crosslinked maleic anhydride (MAn)-vinyl acetate (VAc) polymer particles, in particular to a polymerization method for forming a self-stabilizing crosslinked polymer particle dispersion system after the polymerization reaction is completed . The method can not only prepare cross-linked polymer particles with different shapes, but also maintain active anhydride groups on the surface of the polymer particles. Background technique [0002] Polymaleic anhydride-vinyl acetate (PMV), the lower-line product of the copolymerization of MAn and VAc, is an important polymer fine chemical, widely used as a dispersant, water quality stabilizer, drilling mud thinner, leather retanning agent etc. Regarding the copolymerization of MAn and VAc, the traditional methods mainly include solution polymerization, emulsion polymerization and precipitation polymerization, and these methods are mainly used for the...

Claims

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Application Information

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IPC IPC(8): C08F222/06C08F218/08C08F222/20C08F212/36C08F212/34C08F2/14
Inventor 邓建元刘振杰杨万泰
Owner BEIJING UNIV OF CHEM TECH
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