Dual curing silicone, method of preparing same and...

Details Dual curing silicone, method of preparing same and... Dual curing silicone, method of preparing same and...

C - Chemistry, Metallurgy

08

L

402/25, 400/5325

C08L 83/07 (2006.01)

Patent

CA 1234445

ABSTRACT Novel dual curing silicones are terminated with acrylic functional dialkoxy or diaryloxy silyl groups. They are prepared by condensation of a silanol terminated silicone having a viscosity of bettween 500 and 50,000cps, (mPas) with a silane represented by the formula Image where R3 is alkyl or aryl, R4 is H or C1-5 alkyl and R5 is alkylene, the ratio of silane to silanol silicone being between about 2.1 and 6.1. Compositions of the novel silicones with moisture cure catalysts, photoinitiators and optionally up to 70% trimethyl silyl terminated silicone oils, are both moisture and UV curable and produce soft gel or rubbery cured materials suitable for electronic potting appli- cations.

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