Process for the preparation of carbodiimide-isocyanurate foams

Details Process for the preparation of carbodiimide-isocyanurate foams Process for the preparation of carbodiimide-isocyanurate foams

1977-12-05

1979-08-28

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521117, 521124, 521125, 521126, 521127, 521901, 521902, 521903, C08G 1814, C08G 1822, C08G 1818, C08G 1820

Patent

active

041661648

ABSTRACT:
Rigid foams characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting compound and (b) certain C.sub.1 -C.sub.8 alkali metal carboxylates as trimerization catalysts.

REFERENCES:
patent: 3252942 (1966-05-01), France et al.
patent: 3622577 (1971-11-01), Pedersen
patent: 3657161 (1972-04-01), Bernard et al.
patent: 3717596 (1973-02-01), Kan et al.
patent: 3806475 (1974-04-01), Narayan
patent: 3931065 (1976-01-01), Ashida
patent: 3940517 (1976-02-01), DeLeon
patent: 3969288 (1976-07-01), Cenker
patent: 4051082 (1977-09-01), Cenker
patent: 4054546 (1977-10-01), Narayan

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