B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
402/343, 18/798
B29B 13/02 (2006.01) C08G 75/02 (2006.01)
Patent
CA 1223394
Abstract of the Disclosure A method for stabilizing the Tmc of PPS subjected to heat treatment in a temperature range between 240°C and 320°C, particularly during the heating process of an extrusion operation, by increasing the temperature of the polymer through the 240°C-320°C range at a rate of at least about 20°C per minute or by subsequently raising the temperature of the polymer to at least 350°C for a time sufficient to stabilize the Tmc of the polymer.
452897
Osler Hoskin & Harcourt Llp
Philips Petroleum Company
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