发明名称 |
Polyurethane elastomers exhibiting improved demold, green strength, and water absorption, and haze-free polyols suitable for their preparation |
摘要 |
<p>Polyurethane elastomers exhibiting improved green strength while maintaining short demold times are prepared from ultra-low unsaturation polyoxypropylene polyols containing up to 20 weight percent internal random oxyethylene moieties. The elastomers adsorb less than 10 weight percent water at 0 DEG C. The internal polyoxyethylene moiety-containing polyoxypropylene polyols may be used to prepare ultra-low unsaturation polyoxyethylene capped polyols which are haze-free and which may be used to prepare haze-free 4,4'-MDI prepolymers. Multidisperse blends of monodisperse internal oxyethylene moiety-containing polyoxypropylene polyols of ultra-low unsaturation provide yet further improvements in elastomer processing.</p> |
申请公布号 |
EP1199323(A2) |
申请公布日期 |
2002.04.24 |
申请号 |
EP20010111133 |
申请日期 |
1996.06.12 |
申请人 |
BAYER ANTWERPEN N.V. |
发明人 |
ALLEN, GARY L.;ISAACS, BRUCE H.;BARKSBY, NIGEL;LANGSDORF, LEAH J;SENEKER, STEPHEN D. |
分类号 |
C08G65/12;C08G18/10;C08G18/48;C08G18/65;C08G18/66;C08G18/67;C08G18/76;C08G65/02;C08G65/26;(IPC1-7):C08G18/48 |
主分类号 |
C08G65/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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