Patent · US Expired

Process for the production of new polysiloxane-polyoxyalkylene copolymers with reduced burning properties

US4163830A · kind A · utility

7Cited by

0References

3Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Erwin Windemuth
Manfred Dahm · Leverkusen, DE
Manfred Dietrich · Leverkusen, DE
Peter Muller · Leverkusen, DE

Key dates

Filing date	Mar 13, 1978
Grant date	Aug 7, 1979
Priority date	—
Expiry date	Mar 13, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2483/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.