Thermoset polyurethane elastomers and polyurea elastomers made u

Details Thermoset polyurethane elastomers and polyurea elastomers made u Thermoset polyurethane elastomers and polyurea elastomers made u

1990-09-28

1992-05-26

Kight, III., John

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...

528 44, 528 76, 528 77, 526120, 502169, 428458, C08L 7504

Patent

active

051169312

ABSTRACT:
This invention relates to a method of fabricating a thermoset elastomer which comprises the steps of: (a) fabricating a polyol having a molecular weight of between about 400 and about 15,000 and having a level of end group unsaturation of not greater than 0.04 milliequivalents per gram of polyol, said polyol being fabricated in the presence of a double metal cyanide catalyst, (b) reacting said polyol with a polyisocynate to produce an isocyanate-terminated prepolymer, and (e) reacting said isocyanate-terminated prepolymer with a chain extender other than ethylene glycol in a mold in order to produce the elastomer. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.

REFERENCES:
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patent: 4242490 (1980-12-01), Emerson et al.
patent: 4335188 (1982-06-01), Igi et al.
patent: 4472560 (1984-09-01), Kuyper et al.
patent: 4477589 (1984-10-01), van der Hulst et al.
patent: 4985491 (1991-01-01), Reisch

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