Rigid insulating polyurethane foams prepared from ternary blowin

Details Rigid insulating polyurethane foams prepared from ternary blowin Rigid insulating polyurethane foams prepared from ternary blowin

1993-10-08

1994-06-07

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521126, 521127, 521128, 521174, C08J 912, C08J 914

Patent

active

053189965

ABSTRACT:
Polyurethane foams blown with a mixture of water, HCFC-22 or HCFC-141b, and a perfluorinated hydrocarbon having from 3 to 8 carbon atoms yields polyurethane and polyisocyanurate foams having exceptional physical properties, i.e., small and uniform cells, low initial K-factor, low aged K-factor, and high tensile strength. The low initial and aged K-factors are most unexpected when it is considered that significant amounts of water are used to blow the foam.

REFERENCES:
patent: 3375212 (1968-03-01), Bonner, Jr.
patent: 5254400 (1993-10-01), Bonner, Jr. et al.
patent: 5277834 (1994-01-01), Bivens

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