Process for the preparation of foams characterized by isocyanura

Details Process for the preparation of foams characterized by isocyanura Process for the preparation of foams characterized by isocyanura

1977-03-10

1978-05-30

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AW, C08G 1814, C08G 1822

Patent

active

040922766

ABSTRACT:
Foams characterized by isocyanurate and urethane linkages are prepared by condensing: (a) an organic polyisocyanate with a polyol or (b) a quasi-prepolymer in the presence of a blowing agent and a catalytically effective amount of an alkali metal salt of an organic phosphinic acid. The catalysts of the invention offer the advantages of longer cream times and fully cured foams in acceptable times, thus, finding particular utility in pour-in-place and slab stock foaming applications.

REFERENCES:
patent: 2926147 (1960-02-01), Rappaport et al.
patent: 3450669 (1969-06-01), Nolen
patent: 3476933 (1969-11-01), Mendelsohn
patent: 3624179 (1971-11-01), Carroll
patent: 3634345 (1972-01-01), Diehr et al.
patent: 3637587 (1972-01-01), Cyba

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