Process for preparing polyurea or polyurethane/urea foams

Details Process for preparing polyurea or polyurethane/urea foams Process for preparing polyurea or polyurethane/urea foams

1989-09-27

1992-10-13

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521163, 521167, 528 53, 528 48, 528 76, 528 77, 564393, C08G 1800, C08G 1806

Patent

active

051551420

ABSTRACT:
A process for preparing polyurea or polyurethane/urea foams from a polyamine or aminated polyether polyol is provided. The process comprises reacting the above component with a polyisocyanate (e.g. TDI, MDI etc.), a blowing agent (e.g. water) and a carboxylic acid or carboxylate acid salt. The function of the carboxylic acid or carboxylic acid salt is to slow down the reaction between the amine and the isocyanate so that effective foaming can take place before the reaction is completed.

REFERENCES:
patent: 3256213 (1966-06-01), Gmittor
patent: 4136241 (1979-01-01), Ammann
patent: 4645630 (1987-02-01), Rasshofer et al.
patent: 4732919 (1988-03-01), Grigsby, Jr. et al.
patent: 4758603 (1988-07-01), Carswell
patent: 4931487 (1990-06-01), Priester, Jr. et al.
patent: 4959499 (1990-09-01), Harris

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