Polyisocyanurate compositions and foams of improved friability a

Details Polyisocyanurate compositions and foams of improved friability a Polyisocyanurate compositions and foams of improved friability a

1975-08-25

1977-07-05

Rzucidlo, Eugene C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AB, 260 25AC, 260 304N, 260 775AB, 260 775NC, C08G 1814

Patent

active

040339084

ABSTRACT:
In a process of preparing a polyisocyanurate foam, which process comprises: reacting a polyisocyanate in the presence of a trimerization catalyst and an expanding amount of an inert blowing agent to provide a polyisocyanurate foam, the improvement which comprises: carrying out the reaction in the presence of a plasticizing amount of a nonvolatile liquid carbonate to produce a polyisocyanurate foam having improved friability and dimensional stability properties.

REFERENCES:
patent: 3074894 (1963-01-01), Loew et al.
patent: 3703520 (1972-11-01), Carleton et al.
patent: 3736298 (1973-05-01), Schmit et al.
patent: 3751392 (1973-08-01), Olstowski
patent: 3759916 (1973-09-01), Pitts et al.
patent: 3817939 (1974-06-01), Allen et al.
patent: 3919128 (1975-11-01), Baldino et al.
Journal of Organic Chemistry, vol. 25, No. 6, pp. 1009-1012, (1960) Tsuzuki et al.

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