Light stable elastomers having good dynamic properties

Details Light stable elastomers having good dynamic properties Light stable elastomers having good dynamic properties

C - Chemistry, Metallurgy

08

G

C08G 18/24 (2006.01) C08G 18/10 (2006.01) C08G 18/22 (2006.01) C08G 18/75 (2006.01)

Patent

CA 2206146

This invention relates to novel light stable elastomers which exhibit good dynamic properties, and a process for their preparation. These elastomers comprise the reaction product of an isocyanate prepolymer, a chain extender, and a catalyst selected from i) solid delayed action catalysts having a melting point of greater than about 60°C, ii) alkyl substituted organotin catalysts containing alkylmercaptide ligands, and which are liquid at room temperature, and iii) alkyl substituted organotin catalysts containing sulfur bridging groups, and which are liquid at room temperature.

La présente invention est reliée aux nouveaux élastomères légers et stables ayant de bonnes propriétés dynamiques, ainsi qu'à leur procédé de préparation. Ces élastomères comprennent le produit de la réaction d'un prépolymère d'isocyanate, un allongeur de chaîne, et un catalyseur choisi à partir de i) catalyseurs solides à action retardée ayant un point de fusion supérieur à environ 60 degrés C, ii) catalyseurs d'organo-étain substitués à l'alkyle contenant du mercaptide d'alkyle ligand, qui sont liquides à température ambiante, et iii) catalyseurs d'organo-étain substitués à l'alkyle contenant des groupes sulfuriques de formation de ponts, qui sont liquides à température ambiante.

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