Rigid polyurethane foams

Details Rigid polyurethane foams Rigid polyurethane foams

1998-05-27

1999-12-07

Cooney, Jr., John M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521125, 521128, 521129, 521130, 521131, 521163, 521167, 521170, 521172, 521173, 521174, C08J 904

Patent

active

059984945

ABSTRACT:
Process for the preparation of rigid open celled polyurethane foams comprising the step of reacting an organic polyisocyanate with an isocyanate-reactive material in the presence of a blowing promotor which is an isocyanate-reactive cyclic carbonate or cyclic urea, and in the presence of an aminoalcohol catalyst.

REFERENCES:
patent: 4049931 (1977-09-01), Sandner et al.
patent: 5578656 (1996-11-01), Gillis et al.
patent: 5730896 (1998-03-01), Gillis et al.

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