Halogenated elastomeric compositions having enhanced viscosity.U.S. patent: 7,019,058 Issued: March 28, 2006 Inventors: Hsien-Chang Wang, Andy H. Tsou, Ilan Duvdevani and Michael K. Lyon Assigned: ExxonMobil Chemical Key statement: The invention provides a method for increasing the viscosity of [C.sub.4]-[C.sub.7] isoolefin copolymers including halomethylstyrene derived units by mixing the copolymer copolymer: see polymer. with a hindered amine Hindered amines are chemical compounds conatining an amine functional group surrounded by a crowded steric environment. They have uses such as gas scrubbing, as stabilizers against light-induced degradation of polymers, and as reagents for organic synthesis. or phosphine phosphine 1. PH3, a toxic war gas called hydrogen phosphide. 2. a coal tar dye; called Philadelphia yellow. . |
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