Method for the preparation of silicone-modified polyoxyalkylene

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...

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528 14, 528 15, 528 17, 528 18, 528 21, 528 22, 528 23, 528 25, 528 31, 528 34, 528901, 556444, 524864, 524865, 524863, C08L 9100

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043234887

ABSTRACT:
The present invention provides a novel room temperature-curable composition based on a polyoxyalkylene polyether, e.g. polyoxypropylene, admixed with a curing agent which is very stable when kept in a dry atmosphere or in a hermetically sealed condition but is readily cured when exposed to atmospheric air containing moisture into a rubber-like elastomer. The polyoxyalkylene polyether is terminated at both molecular chain ends with organosilyl groups having alkenyloxy groups bonded to the silicon atoms and can be prepared by the addition reaction of an allyl-terminated polyoxyalkylene polyether with an organosilane or organopolysiloxane compound having at least one silicon-bonded hydrogen atom and at least one silicon-bonded alkenyloxy group in a molecule in the presence of a platinum catalyst.

REFERENCES:
patent: 3218344 (1965-11-01), Bailey
patent: 3887602 (1975-06-01), Thurn et al.
patent: 3892707 (1975-01-01), Itoh et al.

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