发明名称 |
Polyurethane latexes from NCO prepolymers chain extended with polyepoxides, polyanhydrides or polyaldehydes, and layered products |
摘要 |
A latex suitable for forming improved water-resistant polyurethane products. The latex is prepared in an aqueous system by reacting an NCO-terminated, quaternized, preferably linear, polyurethane prepolymer with water and chain-extending the resulting polyurethane-urea with a difunctional or polyfunctional reagent containing groups reactive with primary amino groups, such as epoxy groups, anhydrides and aldehydes, thus increasing the molecular weight of said polyurethane-urea. The latex thus formed can be dried into highly water-resistant films, coatings, and the like.
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申请公布号 |
US4160065(A) |
申请公布日期 |
1979.07.03 |
申请号 |
US19760750476 |
申请日期 |
1976.12.14 |
申请人 |
WITCO CHEMICAL CORPORATION |
发明人 |
LOEWRIGKEIT, PETER;VAN DYK, KENNETH A.;MCGIMPSEY, THOMAS T. |
分类号 |
C08G18/08;C09J175/04;(IPC1-7):C08G12/06;C08G18/34;C08G18/32;C08G18/30 |
主分类号 |
C08G18/08 |
代理机构 |
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