Process for producing flame-retardant flexible polyurethane foams

US6380273B1 · kind B1 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Christian Eilbracht · Herne, DE
• Martin Sicken · Cologne, DE

Key dates

• Filing date: Jun 9, 2000
• Grant date: Apr 30, 2002
• Expiry date: Jun 9, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for the production of flame-resistant flexible polyurethane foams having a low susceptibility to core discoloration, which comprises using hydroxyalkyl phosphonates as halogen-free flame retardants and as core discoloration inhibitors. The invention furthermore relates to the use of hydroxyalkyl phosphonates as halogen-free flame retardants for the production of flame-resistant flexible polyurethane foams having a low susceptibility to core discoloration. Finally the invention also relates to a flame resistant flexible polyurethane foam having a low susceptibility to core discoloration which comprises hydroxyalkyl phosphonates as halogen-free flame retardants and as core discoloration inhibitor.