Kraton Polymers U.S. LLC

Eleanor Meyer De Groot

Bing Yang

David Ralph Stewart

A process for pelletizing elastomeric anionically polymerized polymers which comprises subjecting the polymer to solid state extrusion in a single screw extruder with a length to diameter ratio of 10:1 or less wherein the barrel of the extruder has longitudinal grooves and transversally extending pins to increase mixing wherein the temperature in the extruder is sufficient to agglomerate or melt the polymer but be lower than the degradation temperature of the polymer and the speed of the extruder screw is from 30 to 100 rpm.

Conversion of sticky elastomeric polymer crumb into pellets without polymer degradation

A process for finishing a hydrogenated diene polymer by producing porous pellets from a water slurry of the hydrogenated block copolymer. The process comprises adjusting the water content of the slurry to from 9 to 16 percent by weight, moving the slurry through a mechanical two-stage extruder dryer, drying the slurry at a temperature of 100 to 180&deg; C., and recovering porous copolymer pellets having a moisture content of 0.2 to 3.0 percent by weight.

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Friendswood, TX, United States of America

Eleanor Meyer De Groot