Rigid polyurethane and polyisocyanurate foams

Details Rigid polyurethane and polyisocyanurate foams Rigid polyurethane and polyisocyanurate foams

1991-01-14

1992-04-07

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521166, C08G 1814

Patent

active

051029235

ABSTRACT:
Novel rigid polyurethane and/or polyisocyanurate foams are disclosed which have fine cell structure, low K-factor, and flame retardance. These foams are prepared by the reaction of a polyisocyanate with heterocyclic nitrogen containing polybeta-hydroxy urethane functional polyols which act as chemically bound flame retardants. Also disclosed are novel modified poly-beta-hydroxyalkyl carbamylalkylated heterocyclic nitrogen containing polyols useful for the formation of rigid foams.

REFERENCES:
patent: 4708984 (1987-11-01), Forgione et al.

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