- 专利标题: Oligomeric formal diols of poly(tetramethylene ether) glycol and polyurethanes prepared therefrom
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申请号: US318946申请日: 1981-11-06
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公开(公告)号: US4355119A公开(公告)日: 1982-10-19
- 发明人: Engelbert Pechhold
- 申请人: Engelbert Pechhold
- 申请人地址: DE Wilmington
- 专利权人: E. I. DuPont de Nemours and Company
- 当前专利权人: E. I. DuPont de Nemours and Company
- 当前专利权人地址: DE Wilmington
- 主分类号: C07C43/315
- IPC分类号: C07C43/315 ; C08G4/00 ; C08G18/56 ; C08G18/14
摘要:
Oligomeric formal diols are prepared by coupling segments of PTMEG, each having a molecular weight of 1000-3000, with formaldehyde. The formal diols are useful in preparing polyurethanes.
公开/授权文献
- USD325283S Candy bar 公开/授权日:1992-04-14
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