Process for synthesis of silicone resin

US6395825B1 · kind B1 · utility

Assignees

• Dow Corning Corporation · US
• Dow Corning Asia Limited · JP

Inventors

• Gregory Scott Becker · Sanford, US
• Leslie Earl Carpenter, II · Midland, US
• Russell Keith King · Midland, US
• Tetsuyuki Michino · Chigasaki, JP
• Eric Scott Moyer · Midland, US
• Craig Rollin Yeakle · Midland, US

Key dates

• Filing date: Apr 28, 2000
• Grant date: May 28, 2002
• Expiry date: Apr 28, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for hydrolyzing chlorosilanes having at least three chlorine atoms bonded to each silicon atom to form silicone resins. The method comprises adding at least one of hydridotrichlorosilane, tetrachlorosilane, or organotrichlorosilane to a two-phase mixture comprising a non-polar organic solvent, an aqueous phase comprising 0 to about 43 weight percent hydrochloric acid, and a surface active compound selected from the group consisting of organosulfates described by formula R2SO4H and alkali metal salts thereof, where R2 is selected from the group consisting of alkyl groups comprising about 4 to 16 carbon atoms and alkylphenyl groups comprising 7 to about 22 carbon atoms.