Storage-stable prepolymers sprayable from a pressure vessel

Details Storage-stable prepolymers sprayable from a pressure vessel Storage-stable prepolymers sprayable from a pressure vessel

1979-03-28

1981-03-24

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521164, 521167, 521917, 521160, C08G 1814, C08G 1876, C08G 1848

Patent

active

042581400

ABSTRACT:
A process for the manufacture of dimensionally stable polyurethane foams by releasing, and curing by interaction with the atmosphere, a mixture, which is under pressure, of prepolymers, containing isocyanate groups, and blowing agents, with or without assistants and additives, wherein the prepolymers, containing isocyanate groups, are obtained by reaction of organic polyisocyanates with difunctional to octafunctional polyester-polyols and/or polyether-polyols, containing chemically bonded tertiary amino groups in the polymer chain, or, preferably, with mixtures of such polyester-polyols and/or polyether-polyols and nitrogen-free polyester-polyols and/or polyether-polyols.

REFERENCES:
patent: 3029208 (1962-04-01), Khawam
patent: 3112281 (1963-11-01), Gromacki et al.
patent: 3640997 (1972-02-01), Fijal
patent: 3830760 (1974-08-01), Bengtson

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