Manufacture of cellular polymers and compositions therefor

Details Manufacture of cellular polymers and compositions therefor Manufacture of cellular polymers and compositions therefor

1992-11-10

1993-08-31

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521114, 521121, 521129, 521131, 521132, 521155, 521163, 521170, 264 455, C08J 934, C08J 912, C08J 914

Patent

active

052409651

ABSTRACT:
A method for the preparation of a flexible foam, an integral skin foam or a microcellular elastomer by reacting an organic polyisocyanate and an isocyanate-reactive composition comprising at least one isocyanate-reactive compound of molecular weight of 1000 to 10000 and a functionality of 2 to 4 in the presence of a blowing agent, characterised in that the reaction is conducted in the presence of an inert, insoluble, organic liquid which has a boiling point of at least 60.degree. C. at 1 bar. CFC-free foams and elastomers of good quality are obtainable.

REFERENCES:
patent: 4972002 (1990-11-01), Volkert
patent: 4981879 (1991-01-01), Snider
patent: 5001164 (1991-03-01), Smits et al.
patent: 5034424 (1991-07-01), Wenning et al.

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