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Method for preparing maleic anhydride-alkyl vinyl ether co-polymer

A technology of alkyl vinyl ether and methyl vinyl ether, which is applied in the field of organic chemical production and can solve the problems of high toxicity of solvents, etc.

Inactive Publication Date: 2009-06-17
锦西化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high solvent toxicity in the traditional solution polymerization method, and at the same time add a certain amount of isobutyl vinyl ether to methyl vinyl ether to modify the polymer to improve its processing performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Dissolve 98.0g maleic anhydride in 200g mixed solvent (the ratio of n-hexane and methyl ethyl ketone is 4:1, the same below), put it into a 1000mL high-pressure reactor with a stirring paddle, start stirring under the protection of nitrogen, and raise the temperature to 81°C , within 1 hour, a mixture of 34g mixed solvent, 55.1g methyl vinyl ether, 2.85g isobutyl vinyl ether, 0.04g peroxydicarbonate bis(2-ethyl-hexyl) ester was added dropwise to the reaction Kettle, maintained at 81 ° C for 7 hours of polymerization reaction to obtain a slurry copolymer solution, filtered and vacuum dried to finally obtain 150.3 g of white polymer powder with a yield of 96.4%. The analysis test results are shown in Table 1.

Embodiment 2

[0014] Dissolve 98.0g maleic anhydride in 200g mixed solvent (the ratio of n-hexane and methyl ethyl ketone is 4:1, the same below), put it into a 1000mL autoclave with a stirring paddle, start stirring under the protection of nitrogen, and raise the temperature to 85°C , within 1 hour, a mixture of 160g mixed solvent, 55.1g methyl vinyl ether, 5.0g isobutyl vinyl ether, and 0.16g peroxydicarbonate bis(2-ethyl-hexyl) ester was added dropwise to the reaction The kettle was kept at 85° C. for 6 hours for polymerization reaction to obtain a slurry copolymer solution, which was filtered and vacuum-dried to finally obtain 150.3 g of white polymer powder with a yield of 95.1%. The analysis test results are shown in Table 1.

Embodiment 3

[0016] Dissolve 98.0g maleic anhydride in 200g mixed solvent (the ratio of n-hexane to methyl ethyl ketone is 3:1, the same below), put it into a 1000mL autoclave with a stirring paddle, start stirring under the protection of nitrogen, and raise the temperature to 90°C , within 1 hour, a mixture of 160g mixed solvent, 55.1g methyl vinyl ether, 5.0g isobutyl vinyl ether, and 0.16g peroxydicarbonate bis(2-ethyl-hexyl) ester was added dropwise to the reaction The kettle was kept at 90° C. for 5 hours for polymerization reaction to obtain a slurry copolymer solution, which was filtered and vacuum-dried to finally obtain 148.1 g of white polymer powder with a yield of 93.7%. The analysis test results are shown in Table 1.

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PUM

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Abstract

The invention relates to a solution copolymerization method for preparing a maleic anhydride-alkyl vinyl ether alternate copolymer. The method is characterized in that the method comprises the following steps: carrying out the solution copolymerization reaction of the maleic anhydride and the alkyl vinyl ether in the mol ratio of 1:1 in the mixed solvent through the initiation of an initiator, setting the polymerization temperature between 81 and 90 DEG C and the reaction time between 5 and 7 hours, obtaining slurry copolymer solution, filtrating and drying the solution in vacuum, and finally obtaining the white polymer powder.

Description

technical field [0001] The invention belongs to the technical field of organic chemical production, and in particular relates to a solution copolymerization method of maleic anhydride, methyl vinyl ether and isobutyl vinyl ether terpolymer. Background technique [0002] Maleic anhydride-alkyl vinyl ether copolymer is a linear molecular structure, water-soluble electrolyte polymer, because it is non-toxic to the human body and has good chemical stability, adhesion, coalescence, water retention, and film-forming properties (The formed film is easy to peel off), and has been widely used in many fields such as medicine and chemical industry. It can be used as an additive for stabilizers, adhesives, preservatives, hair spray fixatives, builders for synthetic detergents, and tooth filling materials. In addition, the esterification product of the copolymer is also widely used in the above-mentioned fields. [0003] The research on maleic anhydride-alkyl vinyl ether copolymers beg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/06C08F216/18C08F2/06
Inventor 王绍民包永忠杨肃宁宋琳珩
Owner 锦西化工研究院有限公司
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