Preparation of polydiorganosiloxanes having terminal triorganosi

Details Preparation of polydiorganosiloxanes having terminal triorganosi Preparation of polydiorganosiloxanes having terminal triorganosi

1982-09-13

1984-03-27

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 37, 556462, C08G 7706

Patent

active

044395922

ABSTRACT:
The present invention relates to a process for the preparation of trioganosilyl-terminated polydiorganosiloxanes by basic polymerization of cyclic diorganopolysiloxanes and triorganosilyl-terminated siloxanes, wherein, before the polymerization, a part of the cyclic diorganosiloxane is distilled off in the presence of the polymerization catalyst at a temperature which is at least 10.degree. C. below the polymerization temperature.

REFERENCES:
patent: 3779787 (1973-12-01), Haslam et al.
patent: 3779987 (1973-12-01), Razzano et al.
patent: 3978104 (1976-08-01), Razzano
patent: 4341888 (1982-07-01), Razzano

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