Impregnated soft substance gasket

US4741965A · kind A · utility

Assignee

• Goetze GmbH · DE

Inventors

• Hans-Rainer Zerfass · Burscheid, DE
• Franz-Josef Giesen · Rommerskirchen, DE

Key dates

• Filing date: Dec 11, 1986
• Grant date: May 3, 1988
• Expiry date: Dec 11, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2926
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A soft substance gasket material preferably made of a metal reinforced fiber mat is impregnated with a silicone impregnating agent comprising a mixture of a polysiloxane having reactive hydrogen groups such as a polyhydrogen siloxane, an addition cross-linking polysiloxane such as a methyl vinyl siloxane, and cross-linking catalysts, preferably in the form of only one organic metal compound. In spite of having small quantities of addition cross-linking polysiloxane and cross-linking catalysts, the impregnated seals are not tacky after cross-linking, they are easy and inexpensive to manufacture, and they evidence improved functional characteristics such as improved resistance to hot media, temperature and aging when compared with seals impregnated with only one type of polysiloxane.