Patent ID: 9598527
Date: 2017-03-21
CPC Classifications: B32B,C08G,C09D,Y10T

Claim:
1. An article comprising a polyurethane comprising a reaction product of components comprising: (a) about 1 equivalent of at least one polyisocyanate; (b) about 0.05 to about 0.9 equivalents of at least one branched polyol having 3 to 18 carbon atoms and at least 3 hydroxyl groups; and (c) about 0.1 to about 0.95 equivalents of sorbitol, mannitol, and/or at least one diol having 2 to 18 carbon atoms, wherein the reaction product components comprise less than about 5 weight percent of polyester polyol, polycarbonate polyol or polyether polyol and less than about 2 weight percent of amine curing agent on a basis of total weight of the components, wherein, upon mixing, the reaction components are maintained at a reaction temperature of at least 110° C. for at least about 10 minutes, degassed, and reacted at a temperature of about 100° C. to about 140° C. for at least about 6 hours, and wherein the article is cured at a temperature of from about 120° C. to about 150° C. for a curing time period of from about 0.5 to about 72 hours, and wherein the article has a Gardner Impact strength of from about 100 in-lb (11 Joules) to about 640 in-lb (72 Joules) according to ASTM-D 5420-04, wherein the Gardner Impact strength is measured after the curing time period.