Patent · US Expired

Preparation of polydiorganosiloxanes

US6998437B2 · kind B2 · utility

3Cited by

11References

20Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Michael Stepp · Braunau am Inn, AT
Wolfgang Keller · Munich, DE

Key dates

Filing date	May 29, 2003
Grant date	Feb 14, 2006
Priority date	—
Expiry date	Jan 12, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/08
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polydiorganosiloxanes of the general formulaR1—(OSiR2)nOH (I)are prepared by reacting hexaorganocyclotrisiloxanes of the formula(R2SiO)3 (II)with alcohols of the formulaR1—OH (III)where each R is the same or different and is a monovalent, optionally substituted hydrocarbon radical,

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