首页>
外国专利>
Thermoset polyurethane elastomers and polyurea elastomers made using high functionality, low unsaturation level polyols prepared with double metal cyanide catalysts
Thermoset polyurethane elastomers and polyurea elastomers made using high functionality, low unsaturation level polyols prepared with double metal cyanide catalysts
This invention relates to a method of fabricating a thermoset elastomer which comprises the steps of: (a) fabricating a polyol having a molecular weight of between about 400 and about 15,000 and having a level of end group unsaturation of not greater than 0.04 milliequivalents per gram of polyol, said polyol being fabricated in the presence of a double metal cyanide catalyst, (b) reacting said polyol with a polyisocynate to produce an isocyanate-terminated prepolymer, and (e) reacting said isocyanate-terminated prepolymer with a chain extender other than ethylene glycol in a mold in order to produce the elastomer. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.
展开▼