Fluorocarbon elastomer silicone vulcanizates

US7173092B2 · kind B2 · utility

Assignee

• Dow Corning Corporation · US

Inventors

• Gerald A. Gornowicz · Midland, US
• Igor Chorvath · Midland, US
• Lauren Tonge · Sanford, US
• Yung K. Kim · Midland, US
• David Romenesko · Midland, US
• Kermit S. Kwan · Cumming, US
• Stephen Warren · Midland, US

Key dates

• Filing date: Jun 6, 2003
• Grant date: Feb 6, 2007
• Expiry date: Aug 6, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2383/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method is disclosed for preparing an elastomeric base composition comprising: (I) mixing (A) a fluorocarbon elastomer with (B) a compatibilizer, (C) an optional catalyst, (II) mixing the product of step (I) with (D) a silicone base comprising a curable organopolysiloxane, (E), an optional crosslinking agent, (F) a cure agent in an amount sufficient to cure said organopolysiloxane; and (III) dynamically vulcanizing the organopolysiloxane, wherein the weight ratio of fluorocarbon elastomer (A) to silicone base (B) in the elastomeric base composition ranges from 95:5 to 30:70. The cured rubber compositions obtained from the elastomeric base compositions herein have good fuel resistance properties.