Preparation method of epoxy phenyl silicone rubber

A technology of phenyl silicone rubber and epoxidized benzene, which is applied in the field of silicone rubber, can solve problems such as corrosion of metal reactors and troublesome construction of industrial production lines, and achieve the effects of improving efficiency, shortening reaction time, and mild reaction process
CN110358091AActive Publication Date: 2019-10-22BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2019-10-22

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Abstract

The invention discloses a preparation method of epoxy phenyl silicone rubber. The method includes the steps that (1) chlorobenzene and phenyl silicone rubber are added into a reaction kettle, and stirring is conducted until the phenyl silicone rubber is completely dissolved; and (2) meta-chloroperoxybenzoic acid is added for reaction, and then precipitation, washing and drying are carried out, wherein the mole ratio of the double-bond content in the meta-chloroperoxybenzoic acid to the double-bond content in the phenyl silicone rubber is 1 to (1.1-1.5). The phenyl silicone rubber with the vinyl content being 5-40% can be efficiently and successfully epoxidized, and the epoxidation conversion rate can reach 90% or above. Compared with existing phenyl silicone rubber epoxidation modificationprocesses, the reaction time is successfully shortened by 25%, the dissolution concentration of the phenyl silicone rubber is successfully increased, and efficiency is greatly improved. More importantly, using of a trichloromethane dissolvent which is highly toxic and can corrode metal containers is omitted, and possibility is provided for industrialization of phenyl silicone rubber epoxidation.The reaction process is mild, and less side reaction occurs.
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Description

technical field

[0001] The invention relates to the technical field of silicone rubber, in particular to a preparation method of epoxidized phenyl silicone rubber. Background technique

[0002] After the epoxidation functional group is introduced into the side chain structure of phenyl silicone rubber, it can destroy the low-temperature crystallization of silicone rubber itself, improve its low-temperature performance, increase the rigidity of the main chain of silicone rubber, and increase the thermal stability of silicone rubber in a nitrogen atmosphere. Decomposition temperature, improve its high temperature resistance. At the same time, the introduction of epoxidized functional groups can also endow epoxidized phenyl silicone rubber with better interfacial interaction with fumed silica and improve its physical and mechanical properties. Most importantly, as the degree of epoxidation increases, the polarity of phenyl silicone rubber also increases, which improves the oil...

Claims

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