Room temperature curable resin compositions and articles

A room-temperature curable resin composition using organic polymers with hydrolyzable silyl groups and cyclic ketone leaving compounds, along with titanium or bismuth catalysts, addresses health and environmental concerns, achieving safe and effective curing with superior adhesion and durability.

JP7831496B2Active Publication Date: 2026-03-17SHIN ETSU CHEMICAL CO LTD
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Patent Information

Application Number
JP2023570925
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-12-27
Filing Date
2022-12-22
Publication Date
2026-03-17
Estimated Expiration
2042-12-22

AI Technical Summary

Technical Problem

Existing room-temperature curable resin compositions using organopolysiloxane-based polymers face health hazards due to toxic leaving compounds like methanol and oxime, and environmental concerns due to tin catalysts, with inferior curability compared to de-oxime types.

Method used

A room-temperature curable resin composition using organic polymers with hydrolyzable silyl or hydroxysilyl groups and a cyclic ketone compound as a leaving group, along with titanium or bismuth-based catalysts, to achieve safe and effective curing without toxic by-products.

Benefits of technology

The composition provides a safe, environmentally friendly rubber cured product with excellent adhesion and durability, equivalent to compositions using tin catalysts, while eliminating health and environmental risks.

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Abstract

A room-temperature-curing resin composition, which contains in specific ratios (A) an organic polymer in which molecular chain ends are capped by hydrolyzable silyl groups and / or hydroxysilyl groups and (B) a hydrolyzable organosilane compound represented in general formula (1) below and / or a partially hydrolyzed condensate thereof (where R1 is a monovalent hydrocarbon group having a carbon number of 1-10, n is 1-8, and m is 3 or 4), has equivalent or superior curing properties compared to conventional alcohol-release or oxime-release room-temperature-curing resin compositions even if various catalysts are used, can reduce harmful effects on humans and environmental load, and can provide a cured rubber product after curing having favorable rubber properties, adhesion, and durability.
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