Polyurethane elastomers having improved green strength and...

Details Polyurethane elastomers having improved green strength and... Polyurethane elastomers having improved green strength and...

C - Chemistry, Metallurgy

08

G

C08G 18/66 (2006.01) A43B 13/04 (2006.01) C08G 18/10 (2006.01) C08G 18/12 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 65/26 (2006.01) C08L 71/02 (2006.01)

Patent

CA 2178139

Elastomers exhibiting decreased demold times and improved green strength are prepared by reacting a di- or polyisocyanate with a monodisperse polyoxypro- pylene diol having ultra-low unsaturation, and prefera- bly prepared by the double metal cyanide-t-butyl alcohol catalyzed polymerization of propylene oxide. Further improved demold times and elevated elastomer physical properties are made possible by the use of multidisperse polyoxyalkylene polyether polyol blends having an overall unsaturation of less than 0.010 meq/g and a polydispersity of about 1.4 or greater.

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