Patent · US Active

Preparation of organosiloxane polymers

US8487037B2 · kind B2 · utility

2Cited by

85References

12Claims

0Family size

Assignee

Dow Corning Corporation · US

Inventors

Andreas Stammer · Thiméon, BE
Andreas Wolf · Gauting, DE

Key dates

Filing date	Mar 18, 2010
Grant date	Jul 16, 2013
Priority date	—
Expiry date	Mar 18, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K3/1018
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A method of making a polysiloxane containing polymer is described. The method comprises the steps of: i) Preparing a polysiloxane containing polymer by the polycondensation of siloxane containing monomers and/or oligomers which comprise at least 2 condensable groups per molecule, in the presence of (a) one or more condensation catalysts and optionally one or both of (b) a diluent (a plasticizer and/or extender) and/or an end-blocking agent; and ii) Where required quenching the polymerization process. The diluent, when present, is substantially retained within the resulting diluted polysiloxane containing polymer and the process takes place at a pressure of at least 75×105 Pa (0.75 MPa).

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