Reaction injection molded polyurethane

Details Reaction injection molded polyurethane Reaction injection molded polyurethane

1979-05-23

1981-01-06

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264DIG83, 521112, 521126, 521127, 521129, 521131, 521133, 521914, C08G 1814, C08G 1848, C08G 1832

Patent

active

042437601

ABSTRACT:
Covers a polyurethane elastomer of improved moldability, particularly useful in RIM applications which comprises the reaction product of an aromatic polyisocyanate, a high molecular weight polyether triol containing an internal mixed propylene oxide-ethylene oxide segment comprising 2-35% ethylene oxide by weight and 65-98% by weight of propylene oxide and an ethylene oxide cap such that said polyol has a primary hydroxyl content greater than 50% and preferably greater than 90%, and a chain-extending agent. Also covers the method of making said elastomer.

REFERENCES:
patent: 3535307 (1970-10-01), Moss et al.
patent: 3630973 (1971-12-01), Ardis et al.
patent: 3857800 (1974-12-01), Fishbein et al.
patent: 4065410 (1977-12-01), Scheefer et al.
patent: 4125505 (1978-11-01), Critchfield et al.
patent: 4126742 (1978-11-01), Carleton et al.

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