C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/24 (2006.01) C08G 75/02 (2006.01) C08G 75/14 (2006.01)
Patent
CA 2071516
2071516 9109072 PCTABS00005 A process for preparation of a copoly(arylene sulfide) which has an increased amount of disulfide radicals and corresponds to the structure [(-A-S-)1-x(-A-S-S-)x]n, wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.50 to 0.005 and n is at least 50, comprising contacting a disulfide radical increasable copoly(arylene sulfide) corresponding to the structure [(-A-S-)1-x(-A-S-S-)x]n, wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.45 to 0.001 and n is at least 25, in the melt phase with elemental sulfur for a sufficient period of time and at a temperature above 250 degrees C to increase the molecular weight of the copoly(arylene sulfide).
Fagerburg David R.
Lawrence Paul B.
Rule Mark
Watkins Joseph J.
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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