Process for the preparation of poly(diorganosiloxanes) with alko

Details Process for the preparation of poly(diorganosiloxanes) with alko Process for the preparation of poly(diorganosiloxanes) with alko

1986-06-11

1987-11-10

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...

524588, 524788, 524789, 524859, 528 21, 525474, C08L 8304

Patent

active

047058269

ABSTRACT:
A process for the preparation of triorganooxysilyl- or diorganooxyorganosilyl-terminated poly(diorganosiloxanes) or formulations containing such siloxanes comprising reacting .alpha.,.omega.-dihydroxypoly(diorganosiloxanes) with tetraorganyloxysilanes or triorganyloxyorganosilanes in the presence of an ammonium carbamate catalyst of the formula I ##STR1## wherein, R represents a hydrocarbon radical with 1-20 C atoms or an H atom, and where identical or different R radicals are in the molecule.
The products produced by this process can be employed in the preparation of one-component silicone paste which harden into elastomers in the presence of moisture.

REFERENCES:
patent: Re29760 (1978-09-01), Brown et al.
patent: 2909549 (1959-10-01), Bailey
patent: 3296195 (1967-01-01), Goossens
patent: 4486567 (1984-12-01), Bowman et al.
"Methoden der Organischen Chemie", Houben-Weyl, Band E4, 4th edition, 1983, p. 142.

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