Patent ID: 6998431
Filing Date: 2006-02-14
Classification: C08K

Abstract:
1. In the production and treatment of an alpha olefin polymer, the process comprising: a. operating a polymerization reactor for the reaction of an alpha olefin supplied to said reactor to produce a thermoplastic polymer product comprising a homopolymer or copolymer of said alpha olefin; b. withdrawing a product stream containing said therimoplastic polymer product from said polymerization reactor; c. supplying an oxidized hindered amine light stabilizer which is effective to retard thermal degradation and the degeneration of said polymer product in the presence of electromagnetic variation in the visible light or ultraviolet range oxidizing said hindered amine light stabilizer being the product of admixing an oxidizing agent with a hindered amine light stabilizer under conditions effective to convert at least a portion of the amine groups in said hindered amine light stabilizer to nitroxyl groups; d. recovering said polymer product from said product stream; and e. heating said recovered polymer product and thereafter processing said heated polymer product to produce said polymer product in a granular or pelletized form.