Intumescent flexible polyurethane foam

Details Intumescent flexible polyurethane foam Intumescent flexible polyurethane foam

1980-10-24

1982-03-02

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521123, 521131, 521166, 521906, C08G 1814, C08G 1838

Patent

active

043178898

ABSTRACT:
Flexible, resilient, polyurethane foam having improved flame retardancy and intumescent properties is prepared from a reaction mixture comprising a polyester polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a melamine derivative wherein one or more hydrogens have been replaced by a methylol and/or lower alkoxymethyl group, a flame retardant, and hydrated alumina. In a preferred embodiment, the hydrated alumina is predispersed in a mixture comprising the melamine derivative, the flame retardant, and a low-viscosity linear polyester polyol.

REFERENCES:
patent: 3772222 (1973-11-01), Steward et al.
patent: 3909464 (1975-09-01), Anorga et al.
patent: 4147678 (1979-04-01), Mag et al.
patent: 4165411 (1979-08-01), Marans et al.
patent: 4210452 (1980-07-01), Nicholson et al.
patent: 4237182 (1980-12-01), Fulmer et al.

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