High-modulus polyisocyanurate elastomers

Details High-modulus polyisocyanurate elastomers High-modulus polyisocyanurate elastomers

1978-05-15

1978-11-21

Cockeram, H.S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

428423, 528 44, 528 54, 528 67, 528905, 528906, C08G 1822, C08G 1876, C08G 1832

Patent

active

041267427

ABSTRACT:
Novel solid polyisocyanurate polymers are disclosed which comprises the reaction product of an organic polyisocyanate, a trimerization catalyst and a polyol combination comprising from about 0.025 to about 0.15 equivalent and about 0.05 to about 0.25 equivalent, per equivalent of polyisocyanate, respectively of an ethylene oxide capped polypropyleneoxy glycol having an equivalent weight of from about 750 to about 1500 and either 1,4-butanediol or diethylene glycol.
Although containing a higher proportion of polyurethane linkages than those polyisocyanurates containing the polypropyleneoxy glycol alone, the polymers of the invention are characterized by superior high temperature resistance and are particularly useful in the preparation of high modulus molded parts using reaction injection molding (RIM) techniques.

REFERENCES:
patent: 3620987 (1971-11-01), McLaughlin et al.
patent: 3745133 (1973-07-01), Communale et al.
patent: 3849349 (1974-11-01), Frisch et al.
patent: 3986991 (1976-10-01), Kolakowski et al.

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