Patent · US Expired

Intumescent flexible polyurethane foam

US4374207A · kind A · utility

75Cited by

11References

36Claims

0Family size

Assignee

G.F.C. Foam Corporation · US

Inventors

Herman Stone · Hazleton, US
Peter D. Pauly · Smethport, US
Michael P. Pcolinsky, Jr. · Hazleton, US

Key dates

Filing date	Oct 24, 1980
Grant date	Feb 15, 1983
Priority date	—
Expiry date	Oct 24, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Flexible, resilient, polyurethane foam having improved flame retardancy and intumescent properties is prepared from a reaction mixture comprising a polyether polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a flame retardant, and hydrated alumina. Alternatively, the mixture also comprises a low-viscosity linear polyester. The hydrated alumina is predispersed in a mixture comprising flame retardant and low-viscosity linear polyester, and alternatively a char former and a fugitive viscosity modifier.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.