Patent · US Active

Process for preparing linear organopolysiloxanes having Si-H groups

US7396894B2 · kind B2 · utility

2Cited by

4References

12Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Gilbert Geisberger · Altötting, DE
Tassilo Lindner · Mehring, DE
Frank Baumann · Mehring, DE

Key dates

Filing date	Apr 19, 2005
Grant date	Jul 8, 2008
Priority date	—
Expiry date	Jun 2, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention provides a process for preparing linear organopolysiloxanes (P) having diorganosiloxy units and Si—H groups, in which, in a first step, diorganodichlorosilanes (A) and monochlorosilanes (B) and optionally dichlorosilanes (C), at least one of the monochlorosilanes (B) or dichlorosilanes (C) containing Si—H groups, are reacted with at most 0.5 mol of water per mole of hydrolyzable chlorine to give a partial hydrolyzate (T) and gaseous hydrogen chloride, and, in a second step, the SiCl groups still present in the partial hydrolyzate (T) are removed by treating with water to form hydrochloric acid, and a hydrolyzate (H) containing the organopolysiloxanes (P) is obtained.

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