发明授权
US4200728A Manufacture of polyethers from bis-(4-hydroxyphenyl)-sulfone and bis-(4-chlorophenyl)-sulfone in N-methylpyrrolidone using an alkali metal carbonate as catalysts 失效
使用碱金属碳酸盐作为催化剂在N-甲基吡咯烷酮中制备双 - (4-羟基苯基) - 砜和双 - (4-氯苯基) - 砜的聚醚

  • 专利标题: Manufacture of polyethers from bis-(4-hydroxyphenyl)-sulfone and bis-(4-chlorophenyl)-sulfone in N-methylpyrrolidone using an alkali metal carbonate as catalysts
  • 专利标题(中): 使用碱金属碳酸盐作为催化剂在N-甲基吡咯烷酮中制备双 - (4-羟基苯基) - 砜和双 - (4-氯苯基) - 砜的聚醚
  • 申请号: US912176
    申请日: 1978-06-05
  • 公开(公告)号: US4200728A
    公开(公告)日: 1980-04-29
  • 发明人: Gerd BlinneClaus Cordes
  • 申请人: Gerd BlinneClaus Cordes
  • 申请人地址: DEX
  • 专利权人: BASF Aktiengesellschaft
  • 当前专利权人: BASF Aktiengesellschaft
  • 当前专利权人地址: DEX
  • 优先权: DEX2731816 19770714
  • 主分类号: C08G65/40
  • IPC分类号: C08G65/40 C08G75/23
Manufacture of polyethers from bis-(4-hydroxyphenyl)-sulfone and
bis-(4-chlorophenyl)-sulfone in N-methylpyrrolidone using an alkali
metal carbonate as catalysts
摘要:
Polyethers, preferably containing sulfone groups, are obtained by a multi-stage condensation process at from 100.degree. to 230.degree. C. from substantially equivalent amounts of bis-(4-hydroxyphenyl)-sulfone and a dichlorobenzene compound in a polar aprotic solvent in the presence of an anhydrous alkali metal carbonate, with or without the addition of a compound which forms an azeotrope.
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