Process for producing a polyurethane elastomer by reaction injec

Details Process for producing a polyurethane elastomer by reaction injec Process for producing a polyurethane elastomer by reaction injec

1983-12-20

1985-06-25

Anderson, Philip

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 264 455, 264 53, 264 54, 2643286, 264DIG83, 521 51, B29D 2700

Patent

active

045254915

ABSTRACT:
A process for producing a shaped article of a non-cellular or microcellular polyurethane elastomer by reaction injection molding by using at least two components of (A) a polyol component comprising a high molecular weight polyol and a chain extender as essential ingredients and (B) an isocyanate component comprising a polyisocyanate compound as essential ingredient, characterized in that substantially all or at least 80% by weight of said high molecular weight polyol is composed of a polyoxyalkylene polyol, and the polyoxyalkylene polyol is a single or mixed polyoxyalkylene polyol which has an average hydroxyl number of from 2.0 to 3.5 and an average hydroxyl value of from 15 to 60 and contains at least 5% by weight, in an average, of oxyethylene groups at the terminal portions of the oxyalkylene chain and in which the total oxyethylene group content is, in an average, less than 21% by weight and the average unsaturated monool content is at most 0.085 meq/g.

REFERENCES:
patent: 3393243 (1968-07-01), Cuscurida
patent: 3427256 (1969-02-01), Milgrom
patent: 3427334 (1969-02-01), Belner
patent: 3427335 (1969-02-01), Herold
patent: 4220727 (1980-09-01), Godlewski
patent: 4440705 (1984-04-01), Nissen et al.

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