发明名称 |
Production of granular poly(arylene sulfide) polymers containing reduced amounts of oligomers |
摘要 |
A method for removing oligomers and non-polymeric impurities from poly(arylene sulfide) polymers and producing the polymers in easily recoverable granular form is provided in which a poly(arylene sulfide) polymer associated with oligomers and non-polymeric impurities is contacted with a solvent, water, and optionally, a base, at a sufficient temperature to substantially dissolve the polymer, oligomers and impurities; then the solution is cooled to a temperature at which the poly(arylene sulfide) precipitates while oligomers and impurities remain in solution, then the precipitated polymer is separated from the solution containing the oligomers and impurities. A polymer product produced by this method is also disclosed.
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申请公布号 |
US5374709(A) |
申请公布日期 |
1994.12.20 |
申请号 |
US19920965833 |
申请日期 |
1992.10.23 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
CLARK, JR., EARL;SCOGGINS, LACEY E.;KILE, GLENN F. |
分类号 |
C08G75/02;C08G75/06;(IPC1-7):C08G75/16 |
主分类号 |
C08G75/02 |
代理机构 |
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代理人 |
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地址 |
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