Polyurethane prepolymers for making elastomers having improved d

Details Polyurethane prepolymers for making elastomers having improved d Polyurethane prepolymers for making elastomers having improved d

1997-01-24

1998-10-13

Cooney, Jr., John M.

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...

560 25, 560 26, 560115, 560158, 560330, 560355, 560358, 560359, 560360, C08G 1810, C07C26100

Patent

active

058213163

ABSTRACT:
An isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyisocyanate and a polyol composition consisting essentially of a polyether polyol of 350-2000 equivalent weight and a low molecular weight polyol of 62 to<300 molecular weight, in an equivalent ratio of low molecular weight polyol to polyether polyol of 0.25-2.7:1. A polyurethane-urea elastomer having good dynamic properties can be prepared by reacting the isocyanate-terminated prepolymer with an aromatic amine chain extender at an equivalent ratio of 0.9-1.1:1.

REFERENCES:
patent: 3963681 (1976-06-01), Kaneko et al.
patent: 4786703 (1988-11-01), Starner et al.
Chen, et al. "Proceedings Polyurethane World Congress 1993-Oct. 10-13, 1993", pp. 388-399.
Cliff, Susan M., "Designing Polyurethane Elastomers for Dynamic Applications" presented at the PMA Meeting, Oct. 1991.

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