Patent ID: 6723769
Filing Date: 2004-04-20
Classification: C08F,C08K,Y10T

Abstract:
In the production and treatment of a stereoregular propylene polymer, the method comprising:a. operating a polymerization reactor for the reaction of propylene supplied to said reactor to produce a stereoregular propylene polymer fluff; b. withdrawing a product stream containing unreacted propylene and said propylene polymer fluff from said polymerization reactor; c. separating at least a portion of said unreacted propylene from said product stream; d. heating said propylene polymer fluff to a temperature sufficient to melt said propylene polymer fluff; e. incorporating into said propylene polymer fluff in an amount within the range of 0.01-0.08 wt. % a tertiary amine characterized by the formula: wherein R is an aliphatic group containing from 8-18 carbon atoms and Râ€² and Râ€³ are each independently a hydroxyalkyl group containing from 1 to 3 carbon atoms; andf. subsequent to said heating and incorporation of said tertiary amine, extruding said heated polymer fluff containing said tertiary amine to produce particles of said amine treated propylene polymer.