Polysiloxane-polyoxyalkylene block copolymers with different pol

Details Polysiloxane-polyoxyalkylene block copolymers with different pol Polysiloxane-polyoxyalkylene block copolymers with different pol

1993-10-29

1994-06-14

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 15, 528 29, C08G 7760

Patent

active

053210514

ABSTRACT:
Polysiloxane-polyoxyalkylene block copolymers, which are intended for the production of polyurethane foams, are prepared. The foams obtained have an improved, finer cell structure and the collapse of the foams is reduced. It is essential for the invention that a mixture of polyoxyalkylene groups is present in the polysiloxane-polyoxyalkylene block copolymers. Further particulars are laid down for selecting the different polyoxyalkylene groups with regard to the respective molecular weights and the ratio of polyoxyalkylene groups to one another.

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