Modified fluorosilicone polymer, two-component silicone sealant and preparation method of two-component silicone sealant

By preparing modified fluorosilicone polymer under the action of palladium-carbon catalyst and used to prepare two-component silicone sealant, the lack of performance of traditional silicone sealant in high and low temperatures and humid environments is solved, and higher bond strength, heat resistance and water resistance are achieved.

CN119751880AActive Publication Date: 2025-04-04GUANGZHOU BAIYUN CHEM IND +1
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Patent Information

Application Number
CN202411893297.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-04-04
Estimated Expiration
2044-12-20

AI Technical Summary

Technical Problem

Traditional two-component silicone sealants have poor performance in high and low temperature and humid environments, and are difficult to meet the application requirements under strict conditions.

Method used

By dehydrocondensation reaction of α,ω-terminal hydroxypolymethyltrifluoropropylsiloxane and dimethoxyphenylsilane under the action of palladium carbon catalyst, a modified fluorosilomer with polyphenyl ring pendant was prepared, and used as the base polymer to prepare two-component silicone sealant.

Benefits of technology

The high and low temperature bonding strength, heat resistance and water resistance of two-component silicone sealant are improved, and the problem of performance degradation under high temperature and immersion conditions is solved.

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Abstract

The invention discloses a modified fluorosilicone polymer, a two-component silicone sealant and a preparation method of the two-component silicone sealant. The structural formula of the modified fluorosilicone polymer is shown in the specification. The preparation raw materials of the two-component silicone sealant contain the modified fluorosilicone polymer. The modified fluorosilicone polymer provided by the invention is used as a basic polymer to replace conventional simethicone, and is matched with alpha, omega-dihydroxy polydimethylsiloxane, a cross-linking agent, a coupling agent and other components to prepare a two-component silicone sealant which has relatively high normal-temperature and low-temperature strength and also has very good heat resistance and water resistance; the defect that the performance of an existing silicone sealant is reduced under the conditions of high temperature and water immersion is overcome. # imgabs0 #
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