Urethane elastomers prepared from polyethers having a certain mo

Details Urethane elastomers prepared from polyethers having a certain mo Urethane elastomers prepared from polyethers having a certain mo

1974-06-27

1976-06-15

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775AP, C08G 1848

Patent

active

039636810

ABSTRACT:
Polyether urethane elastomer composition having improved mechanical properties has been prepared by using polyfunctional isocyanate, curing agent and polyether having active hydrogen terminal groups, wherein the weight average molecular weight of said polyether is within the range of 1,000 to less than 4,500 and the molecular weight distribution curve of said polyether has at least two peaks, at least one of which is located in the higher molecular weight region and at least another one of which is located in the lower molecular weight region than the rheological critical molecular weight of said polyether and wherein the equivalent ratio (d) of active hydrogen of a curing agent to the isocyanate group of said polyfunctional isocyanate is in the range of 0.9<d<1.2.

REFERENCES:
patent: 3798200 (1974-03-01), Kaneko et al.

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