Process for the production of new polysiloxane-polyoxyalkylene c

Details Process for the production of new polysiloxane-polyoxyalkylene c Process for the production of new polysiloxane-polyoxyalkylene c

1978-03-13

1979-08-07

Marquis, Melvyn I.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

2604482B, 521155, 521159, 521163, 521172, C08J 900

Patent

active

041638301

ABSTRACT:
The invention relates to a method of making branched polysiloxane-polyoxyalkylene copolymers and to their use as stabilizers in the production of polyurethane foam plastics. The copolymers are made by reacting specified organopolysiloxanes with polyisocyanates, heat treating the NCO--containing addition products to cause branching and reacting the branched NCO--containing addition products with monofunctional polyethers. The copolymers can be used to stabilize polyurethane foam reaction mixtures.

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