Latex replacement polyurethane foams with improved flame retardancy

US6740687B2 · kind B2 · utility

Assignee

• FOAMEX L.P. · US

Inventors

• Beat Niederoest · Medford Lakes, US
• Andrew Thompson · West Chester, US
• Joseph W. Lovette · Newark, US
• Chiu Y. Chan · Wilmington, US

Key dates

• Filing date: Aug 14, 2002
• Grant date: May 25, 2004
• Expiry date: Aug 14, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethane foams formed under vacuum (below atmospheric pressure) conditions using toluene diisocyanate or a specific mixture of polyisocyanates with a specific mixture of polyether and graft polyols produces a foam with lower density and better flame retardancy than latex foam, but with equally high resiliency. The foam-forming ingredients are mixed together and foamed under controlled pressures in the range 0.6 to 0.95 bar (absolute), preferably 0.8 to 0.95 bar (absolute). The resulting foam has a ball rebound above about 65 percent.