Process for preparing cross-linking maleic anhydride-styrene copolymer

A technology of styrene copolymer and cross-linked styrene is applied in the field of polymerization for preparing cross-linked maleic anhydride-styrene polymer particles, and can solve the problem of not mentioning the preparation method of cross-linked maleic anhydride-styrene copolymer particles , The degree of cross-linking of microspheres cannot be continuous, and the degree of cross-linking of microspheres is high, achieving the effects of controllable morphology, narrow size distribution and fast reaction rate

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

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Problems solved by technology

This method needs to add higher divinylbenzene as a cross-linking agent and reactive monomer, the degree of cross-linking of the obtained microspheres is high and the degree of cross-linking of the microspheres cannot be continuously adjusted artificially
[0005] The method for preparing maleic anhydride-styrene linear copolymer particle dispersion system without any surfactant or stabilizer condition is not mentioned in the preparation method of the maleic anhydride-styrene copolymer mentioned in the literature, more No mention of a method for the preparation of cross-linked maleic anhydride-styrene copolymer particles

Method used

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  • Process for preparing cross-linking maleic anhydride-styrene copolymer
  • Process for preparing cross-linking maleic anhydride-styrene copolymer
  • Process for preparing cross-linking maleic anhydride-styrene copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] MAn 2.452g, St 2.6g; initiator is azobisisobutyronitrile (AINN), 0.02529g; crosslinking agent DVB, 0.04g; medium is isoamyl acetate, 45mL. Adopt water-bath heating, react 2 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn), dispersion coefficient (U) and polymerization yield (C) of cross-linked PMS copolymer microspheres 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

[0036] MAn 2.452g, St 2.6g; initiator is azobisisoheptanonitrile, 0.0329g; crosslinking agent DVB, 0.06g; medium is butyl acetate, 45mL. Adopt water-bath heating, react 6 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn), dispersion coefficient (U) and polymerization yield (C) of cross-linked PMS copolymer microspheres p ), the results are shown in Table 1

Embodiment 3

[0038] MAn 2.452g, St 2.6g; initiator is dibenzoyl peroxide, 0.05052g; crosslinking agent DVB, 0.0975g; medium is ethyl butyrate, 45mL. Adopt water-bath heating, react 24 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn), dispersion coefficient (U) and polymerization yield (C) of cross-linked PMS copolymer microspheres 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. At present, the research on maleic anhydride-vinyl acetate copolymers mostly focuses on the polymerization research of linear polymers. The invention introduces a monomer, cross linking agents and initiators into medium to dissolve under the condition of nitrogen protection, and reacts for 2 to 24 hours under the temperature of 60 DEG C to 90 DEG C; the monomer is maleic anhydride Man and styrene St, the mol ratio is 1:1, and the mass concentration in the polymerization system is 5 percent to 45 percent; the initiators are organic peroxides or azo compounds, and are 0.05 percent to 1 percent of the total mass of the monomers; the cross linking agents are polyfunctionality alkene organic compounds, and are 0.08 percent to 8.8 percent of the total mass of the reactions system, and the rest is the alkyl ester of medium organic acid. The invention does not use surface active agents or stabilizers, can realize the adjustment and control of crosslinking polymer particle size, appearance and chemical physical properties through the adjustment of the addition amount of the cross linking agents.

Description

technical field [0001] The invention relates to a polymerization method for preparing crosslinked maleic anhydride (MAn)-styrene (St) 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] The research on maleic anhydride (MAn)-styrene (St) copolymers mostly focuses on the polymerization of linear polymers. Styrene (St)-maleic anhydride (MAn) copolymer is a new polymer material with excellent performance and low price. It is widely used in water treatment agents, latex coatings, adhesive modifiers, and pigment dispersions. agent, emulsifier for floor polishing, emulsifier for pesticide, curing agent for epoxy resin, etc. [0003] At present, the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/08C08F212/08C08F212/36C08F222/20C08F222/14C08F2/14
Inventor 邓建元刘振杰杨万泰
Owner BEIJING UNIV OF CHEM TECH
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