Nitrocellulose-free gas-generating composition

US6893517B2 · kind B2 · utility

Assignee

• TRW Airbag Systems GmbH & Co. KG · DE

Inventors

• Siegfried Zeuner · Hersbruck, DE
• Roland Schropp · Tegernheim, DE
• Achim Hofmann · Polling, DE
• Karl-Heinz Rodig · Waldkraiburg, DE

Key dates

• Filing date: Jul 9, 2002
• Grant date: May 17, 2005
• Expiry date: Aug 27, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C06D5/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A nitrocellulose-free, gas-generating composition for use in vehicle occupant restraint systems, in particular in a belt tensioner gas generator, substantially consists of at least one nitrogen-containing organic fuel in a proportion of 55 to 70% by weight, an inorganic oxidator in a proportion of 30 to 45% by weight, at least one combustion moderator in a proportion of up to 10% by weight and up to 5% by weight conventional adjuvants and additives, each in relation to the overall weight of the composition. The composition has a pressure exponent of less than 0.35 and a combustion rate at 200 bar of at least 40 mm/s.