Polyisocyanurate resin and process for making the same

Details Polyisocyanurate resin and process for making the same Polyisocyanurate resin and process for making the same

1980-07-17

1981-11-10

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521174, 521176, 528 75, 528 76, 528 77, C08G 1814

Patent

active

042999243

ABSTRACT:
High-density polyisocyanurate resins having improved rigidity, heat resistance and/or impact resistance can be obtained by reacting a polyisocyanate with a polymer polyol derived from a polyol having a molecular weight of at least 4500, and optionally a crosslinker, in the presence of trimerization catalyst, using isocyanate index of 200-5000.

REFERENCES:
patent: 3383351 (1968-05-01), Stamberger
patent: 4092276 (1978-05-01), Narayan
patent: 4129693 (1978-12-01), Cenker et al.
patent: 4129697 (1978-12-01), Schapel et al.
Buist (ed), Advances in Polyurethane-1, Applied Science, London, 1978, pp. 128-130.
Frisch et al., (ed), Advances in Urethane Science & Technology, Technomic, Westport, Conn., 1976, pp. 132, 133, 156, 157.

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