Process for the preparation of organopolysiloxane-polyether copo

Details Process for the preparation of organopolysiloxane-polyether copo Process for the preparation of organopolysiloxane-polyether copo

1976-05-04

1978-01-24

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604482E, 2604482P, C07F 704, C07F 718

Patent

active

040703860

ABSTRACT:
A method for the preparation of organopolysiloxane-polyether copolymers where the polysiloxane blocks are linked to the polyether blocks through SiOC linkages is disclosed wherein a mixture of organo halogen silanes and organopolysiloxanes are equilibrated using a novel mixed catalyst of a hydrogen halide acid and a peralkylated acid amide. The process produces copolymers having improved shelf life which produce polyurethane foams having excellent stability and other advantages.

REFERENCES:
patent: 2421653 (1947-06-01), Sauer
patent: 3048499 (1962-08-01), Jellinek
patent: 3115512 (1963-12-01), Rossmy et al.
patent: 3299113 (1967-01-01), Haluska
patent: 3661962 (1972-05-01), Geipel

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