Patent · US Active

Method for improving the color index of organopolysiloxanes

US8481775B2 · kind B2 · utility

0Cited by

6References

12Claims

0Family size

Assignee

DSM IP ASSETS B.V. · NL

Inventors

Friedhelm Nickel · Essen, DE
Peter Will · Gomaringen, DE

Key dates

Filing date	Nov 27, 2009
Grant date	Jul 9, 2013
Priority date	—
Expiry date	Dec 19, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to method for improving the color index of organopolysiloxanes functionalized with at least one UV-light absorbing group said method comprising the step of contacting said group carrying organopolysiloxanes with a hydroxy carboxylic acid or a cyclic ester thereof in an organic solvent.

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