Rigid foams with improved insulation properties and a process fo

Details Rigid foams with improved insulation properties and a process fo Rigid foams with improved insulation properties and a process fo

1996-10-23

1998-11-24

Foelak, Morton

Compositions

Preservative agents

Anti-corrosion

521 98, 521131, 521910, C08J 914, C08K 300, C08G 1800

Patent

active

058402128

ABSTRACT:
Rigid foams having improved insulation properties are made by reacting a polyisocyanate with an isocyanate-reactive material in the presence of a blowing agent mixture composed of from about 1 to about 30% by weight of at least one C.sub.2 -C.sub.5 polyfluoroalkane and from about 70 to about 99% by weight of an HCFC, preferably an HCFC selected from chlorodifluoromethane, 1,1-dichloro-1-fluoroethane, 1-chloro-1,1-difluoroethane and mixtures thereof.

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