Method for compounding a polymerized alpha-olefin resin

Details Method for compounding a polymerized alpha-olefin resin Method for compounding a polymerized alpha-olefin resin

B - Operations, Transporting

29

B

B29B 13/02 (2006.01) B29B 7/42 (2006.01) B29C 47/38 (2006.01) B29C 47/78 (2006.01)

Patent

CA 2133114

- 18- ABSTRACT A method for compounding at least one polymerized alpha-olefin resin in an extruder including a screw having a feeding section, a melting section, and a venting section, which method comprises: (1) introducing the resin and a heat transfer medium into the feeding section such that the resin is maintained at a temperature below its melting point; (2) transporting the resin and heat transfer medium to the melting section such that the resin is at a temperature which is at or just above its melting point by sublimation or vaporization of the heat transfer medium and kneading the resin at a temperature which is at or just above its melting point; (3) passing a resin melt of step (2) through a melt seal into a venting section wherein the heat transfer medium is released from the extruder; and (4) pumping the resin melt out of the extruder.

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