Patent · US Active

Polysiloxane-polyorgano block copolymers

US8829140B2 · kind B2 · utility

2Cited by

12References

16Claims

0Family size

Assignee

Momentive Performance Materials GmbH · US

Inventors

John Huggins · Nevada City, US
Hubertus Eversheim · Wermelskirchen, DE

Key dates

Filing date	May 16, 2012
Grant date	Sep 9, 2014
Priority date	—
Expiry date	Sep 7, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/14
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Disclosed herein is a process for the production of a polysiloxane-polyorgano block copolymer. The process includes reacting a reaction mixture containing (a) an ester-functional polydiorganosiloxane and (b) a bisphenolic compound or a bisphenolic compound oligomer. This process has the advantage of yielding block copolymers with controlled block structures and avoiding the impurities that may be carried over from the conventional hydroxyaryloxy-terminated-polydiorganosiloxanes.

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