Polyisocyanurate

Details Polyisocyanurate Polyisocyanurate

1976-10-13

1979-10-02

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252431C, 252431N, 521902, C08G 1814, C08G 1822, C08G 1876, B01J 2304

Patent

active

041699211

ABSTRACT:
An improved polyisocyanurate comprising polymethylene polyphenylisocyanate having a functionality of 2.1 to 3.2 and having an equivalent weight between 120 and 180; a polyol having an equivalent weight between 30 and 100; certain tertiary amino phenols; an alkali metal carboxylate, and a blowing agent.
These compositions exhibit an advantageous cream time, firm time, tack free time, and a low friability.

REFERENCES:
patent: 3516950 (1970-06-01), Haggis
patent: 3644168 (1972-02-01), Bonk
patent: 3644232 (1972-02-01), Bernard
patent: 4129697 (1978-12-01), Schapel et al.

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