Polyalkoxysilyl-terminated polydiorganosiloxanes, methods for th

Details Polyalkoxysilyl-terminated polydiorganosiloxanes, methods for th Polyalkoxysilyl-terminated polydiorganosiloxanes, methods for th

1988-07-29

1989-09-05

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528 18, 528 21, 528 34, 524188, 524267, 524783, 524785, 524788, 524789, C08K 524

Patent

active

048639923

ABSTRACT:
Polyalkoxysilyl-terminated polydiorganosiloxanes which are relatively stable in viscosity over prolonged storage periods are prepared by endcapping a silanol-terminated polydiorganosiloxane in the presence of a catalytic amount of an acidic amine salt which subsequently decomposes to substantially inert products, preferably an amine salt of formic acid, and in the absence of silicon-nitrogen compounds and enoxysilanes normally used as catalyst quenchers and scavengers. The products are useful for the preparation of scavenger-free room temperature vulcanizable compositions, particularly when combined with certain N-alkoxy-silylalkyl-substituted compounds as adhesion promoters.

REFERENCES:
patent: 3888815 (1975-06-01), Bessmer et al.
patent: 4460739 (1984-07-01), Ashby
patent: 4483973 (1984-11-01), Lucas et al.
patent: 4506058 (1985-03-01), Ashby et al.
patent: 4515932 (1985-05-01), Chung
patent: 4517337 (1985-05-01), Lockhart et al.

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