Polyurethane elastomer with enhanced hydrolysis resistance

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/42 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2652297

Disclosed are polyester based polyurethane microcellular elastomers, suitable for shoe soles, with intrinsic hydrolytic stability prepared by the reaction of a polyisocyanate with and isocyanate reactive composition. The elastomers are produced from a polyisocyanate which is a prepolymer containing a polyester based on isomeric mixtures of 1,3- and 1,4-cyclohexane dimethanol, where the isocyanate reactive composition contains such a polyester or where the polyester based on mixtures of 1,3- and 1,4-cyclohexane dimethanol are present in both the prepolymer and isocyanate reactive composition.

L'invention concerne des élastomères microcellulaires de polyuréthanne à base de polyester, convenant à une utilisation pour des semelles de chaussures, présentant une stabilité hydrolytique intrinsèque, préparés par réaction d'un polyisocyanate avec une composition réactive avec les isocyanates. Les élastomères sont produits à partir d'un polyisocyanate qui est un prépolymère contenant un polyester à base de mélanges isomériques de 1,3- et 1,4-cyclohexane diméthanol, la composition réactive avec les isocyanates contenant un tel polyester ou le polyester à base de mélanges de 1,3- et 1,4-cyclohexane diméthanol étant présent à la fois dans le prépolymère et dans la composition réactive avec les isocyanates.

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