发明授权
US06780932B2 Graft polyols prepared by a continuous process 有权
通过连续方法制备的接枝多元醇

  • 专利标题: Graft polyols prepared by a continuous process
  • 专利标题(中): 通过连续方法制备的接枝多元醇
  • 申请号: US10146280
    申请日: 2002-05-15
  • 公开(公告)号: US06780932B2
    公开(公告)日: 2004-08-24
  • 发明人: Duane A. HeymanMao-Yao Huang
  • 申请人: Duane A. HeymanMao-Yao Huang
  • 主分类号: C08F1606
  • IPC分类号: C08F1606
Graft polyols prepared by a continuous process
摘要:
Disclosed is a process for preparation of final graft polyols via a continuous process. In, addition, a final graft polyol formed by the process is disclosed. The process includes the steps of reacting a plurality of ethylenically unsaturated monomers and a reaction moderator with a macromer having induced unsaturation in the presence of a carrier polyol, a free radical polymerization initiator, and a first graft polyol. The process provides for the preparation of a final graft polyol having a solids level of from 30 to 70% in a continuous process. The final graft polyol produced by the process has a lower viscosity over a range of solids levels, a reduced amount of very large irregularly shaped particles, a reduced viscosity change in response to a change in reaction temperature compared to a typical graft polyol, a reduced tendency to foul the continuous reactor, and a broader particle size distribution compared to an identical graft polyol prepared by a semi-batch process.
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