发明授权
- 专利标题: Hydrophilic polyurethane/polyurea sponge
- 专利标题(中): 亲水性聚氨酯/聚脲海绵
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申请号: US875453申请日: 1986-06-17
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公开(公告)号: US4738992A公开(公告)日: 1988-04-19
- 发明人: Wayne K. Larson , Steven T. Hedrick
- 申请人: Wayne K. Larson , Steven T. Hedrick
- 申请人地址: MN St. Paul
- 专利权人: Minnesota Mining and Manufacturing Company
- 当前专利权人: Minnesota Mining and Manufacturing Company
- 当前专利权人地址: MN St. Paul
- 主分类号: C08G18/08
- IPC分类号: C08G18/08 ; C08G18/14
摘要:
A water-absorbing sponge comprises at least one of a pendent sulfo-group containing polyurea and polyurethane, the polymer containing at least one sulfonate equivalent per 20,000 molecular weight units.
公开/授权文献
- US4241390A System for illuminating an annular field 公开/授权日:1980-12-23
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