A silicone rubber containing a benzocyclobutene group and a method for producing the same

By using heated crosslinking and ring-opening polymerization of silicone rubber containing benzocyclobutene groups, the problems of scorching, toxicity, and equipment requirements of existing silicone rubber crosslinking systems have been solved, achieving an efficient and safe crosslinking process and excellent resistance to high and low temperatures and mechanical properties.

CN118930908BActive Publication Date: 2026-06-02DONGHUA UNIV
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGHUA UNIV
Filing Date
2024-08-26
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing silicone rubber crosslinking systems suffer from drawbacks such as scorching, crosslinking agent toxicity, long crosslinking time, and high equipment requirements, making it difficult to meet the demands for efficient, safe, and controllable crosslinking.

Method used

Silicone rubber with a siloxane backbone was prepared by using silicone rubber containing benzocyclobutene groups, crosslinking was achieved through heating, avoiding the use of initiators and producing no small molecule byproducts, and ring-opening polymerization was carried out using an alkaline catalyst and a polar solvent.

Benefits of technology

It achieves controllable crosslinking of silicone rubber, avoids the generation of small molecule impurities, has good high and low temperature resistance and mechanical properties, and simplifies the production process.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN118930908B_ABST
    Figure CN118930908B_ABST
Patent Text Reader

Abstract

The application relates to a silicon rubber containing a benzocyclobutene group and a preparation method thereof, wherein after plasticizing and mixing raw silicon rubber, curing cross-linking is carried out to obtain a cured product, i.e. the silicon rubber containing the benzocyclobutene group; the raw silicon rubber has a siloxane main chain containing a benzocyclobutene group directly connected with a silicon atom; the proportion of the repeating unit containing the benzocyclobutene group in the siloxane main chain is 0.1-5%; the glass transition temperature of the prepared silicon rubber containing the benzocyclobutene group is -110+ / -5 DEG C, the 5% thermal weight loss temperature is 450+ / -10 DEG C, the tensile strength is 5.0-6.9 MPa, and the tear strength is 35.34-40.12 kN / m. The preparation method is simple, small molecule impurities are not introduced, and low molecular by-products are not generated in the reaction process; the silicon rubber containing the benzocyclobutene group has good high and low temperature resistance and mechanical properties.
Need to check novelty before this filing date? Find Prior Art