Process for rim elastomers with superior high temperature dimens

Details Process for rim elastomers with superior high temperature dimens Process for rim elastomers with superior high temperature dimens

1980-02-11

1981-10-27

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521174, 528 65, 528 66, 528 67, 528 77, 528503, C08G 1814, C08G 1876, C08G 1810, C08G 1882

Patent

active

042974445

ABSTRACT:
The invention is a method for making reaction injection molded polyurethane of improved properties. The product ccomprises the reaction product of a high molecular weight polyhydric polyether, a low molecular weight active hydrogen containing compound of at least two functionality and a polyisocyanate wherein at least about 30% of the high molecular weight polyether is first mixed and allowed to react with the polyisocyanate and then the remaining polyhydric polyether and low molecular weight active hydrogen containing compound are added to the polyether and polyisocyanate mixture and allowed to react. Reaction injection molded elastomers are useful as molded articles of commerce including, but not limited to, vehicle body parts.

REFERENCES:
patent: 4048105 (1977-09-01), Salisbury
patent: 4065410 (1977-12-01), Schaefer et al.
patent: 4190711 (1980-02-01), Zarahala et al.
patent: 4218543 (1980-08-01), Weber et al.

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