Method for accurately synthesizing epoxy polysiloxane at low temperature

By using organophosphazene catalysts to catalyze the ring-opening polymerization of tetracyclooxytetrasiloxane monomers with other cyclosiloxane monomers, the problems of weak adhesion of silicone rubber and inaccurate control of epoxy content were solved. This enabled the efficient introduction and precise control of epoxy groups, simplified the process, improved polymerization efficiency, and reduced energy consumption.

CN121699154APending Publication Date: 2026-03-20QINGDAO UNIV OF SCI & TECH
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Patent Information

Application Number
CN202610066687.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-19
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

In existing technologies, silicone rubber has weak adhesive strength, and the methods for introducing epoxy groups are complex and the epoxy content is not precisely controlled, resulting in a complex process flow.

Method used

The ring-opening polymerization or copolymerization of tetracyclooxytetrasiloxane monomers with other cyclosiloxane monomers was catalyzed by organophosphoric nitrile catalysts. The epoxy content was precisely controlled within the range of 0.5 ~ 25 mol% by controlling the feed ratio. The low-temperature polymerization process was adopted, and the reaction was terminated by using end-capping agents and terminators to prepare epoxy-based polysiloxanes.

Benefits of technology

It achieves efficient introduction and precise control of epoxy groups, simplifies the process, improves polymerization efficiency, reduces energy consumption, and the preparation method is simple and low-cost.

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Abstract

The invention discloses a method for accurately synthesizing epoxy polysiloxane with controllable epoxy content by efficiently catalyzing ring-opening polymerization of cyclosiloxane monomers by adopting an organic phosphazene base catalyst. A siloxane copolymer with controllable epoxy siloxane group content can be accurately synthesized at 10-50 DEG C. The invention also discloses a preparation method of the epoxy polysiloxane with controllable epoxy content. The polymer preparation method has the obvious advantages that the polymerization process is simple, the polymerization efficiency is high, the reaction temperature is mild, polysiloxane containing methyl, ethyl, phenyl and vinyl side groups can be prepared, and the polymer preparation method has very high practical application value.
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