Method for producing soft to semi-rigid polyurethane integral foamed materials

US6590003B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Norbert Eisen · Hanerau-Hademarschen, DE
• Daniel Seidlitz · Sankt Goarshausen, DE

Key dates

• Filing date: Jun 6, 2002
• Grant date: Jul 8, 2003
• Expiry date: Jun 6, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for the production of flexible to semi-rigid polyurethane shaped articles with a compacted edge zone of given hardness and a significantly more flexible cell core, so-called integral foams, in which non-combustible mixtures of fluoroalkanes which comprise 1,1,1,3,3-pentafluorobutane (R 365mfc) are employed as physical blowing agents.