Process for the production of thermoformable polyisocyanurate fo

Details Process for the production of thermoformable polyisocyanurate fo Process for the production of thermoformable polyisocyanurate fo

1977-02-04

1978-12-12

Cockeram, H.S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

428425, 521160, 521129, 521902, C08G 1814, C08G 1876, C08G 1865

Patent

active

041296974

ABSTRACT:
The invention relates to thermoformable polyisocyanurate foams which are produced by reacting a polymethylene polyphenyl polyisocyanate having a specified diisocyanate content with polyethers which have an OH number between 28 and 112 and dihydric alcohols which have a molecular weight between 62 and 200 in the presence of isocyanate trimerization catalysts, blowing agents and other foaming agents.

REFERENCES:
patent: 3644232 (1972-02-01), Bernard et al.
patent: 3676380 (1972-07-01), McLaughlin et al.
patent: 3745133 (1973-07-01), Comunale et al.
patent: 3836424 (1974-09-01), Reymore et al.
patent: 3857800 (1974-12-01), Fishbein et al.
patent: 3865762 (1975-02-01), Repiquet et al.
patent: 4009130 (1977-02-01), Zimmerman et al.

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