发明授权
US5328981A Recovery of poly(arylene sulfide ketone) and poly(arylene sulfide
diketone) resins
失效
回收聚(亚芳基硫醚酮)和聚(亚芳基硫醚二酮)树脂
- 专利标题: Recovery of poly(arylene sulfide ketone) and poly(arylene sulfide diketone) resins
- 专利标题(中): 回收聚(亚芳基硫醚酮)和聚(亚芳基硫醚二酮)树脂
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申请号: US794768申请日: 1991-11-19
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公开(公告)号: US5328981A公开(公告)日: 1994-07-12
- 发明人: Afif M. Nesheiwat , Jon F. Geibel
- 申请人: Afif M. Nesheiwat , Jon F. Geibel
- 专利权人: Nesheiwat Afif M,Geibel Jon F
- 当前专利权人: Nesheiwat Afif M,Geibel Jon F
- 主分类号: C08G75/02
- IPC分类号: C08G75/02 ; C08G85/00 ; C08G2/00 ; C08F6/00 ; C08J3/00
摘要:
A poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin having improved handling characteristics is prepared by a process comprising preparing in a first enclosed vessel a slurry comprising a solid poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin and a liquid polar organic compound, and optionally water; then substantially liquifying the resin to form a mixture comprising substantially liquified resin and polar organic compound; then flashing the mixture into a second vessel having a pressure lower than the first vessel, thereby removing a portion of the polar organic compound and solidifying the resin.When the slurry further comprises water, the invention method optionally includes a venting step prior to the substantial liquification of the resin and/or a concentration step after the substantial liquification of the resin.