发明公开
EP0505873A1 A process for sealing and/or priming concrete with aqueous polyisocyanate dispersions and the concrete obtained by this process
失效
一种用于密封和/或使用多异氰酸酯的水性分散体和由此制得的混凝土的混凝土灌注方法。
- 专利标题： A process for sealing and/or priming concrete with aqueous polyisocyanate dispersions and the concrete obtained by this process
- 专利标题（中）： 一种用于密封和/或使用多异氰酸酯的水性分散体和由此制得的混凝土的混凝土灌注方法。
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申请号： EP92104480.6申请日： 1992-03-16
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公开(公告)号： EP0505873A1公开(公告)日： 1992-09-30
- 发明人: Markusch, Peter H. , Cibulas, William , Tirpak, Robin E.
- 申请人： Bayer Corporation
- 申请人地址： One Mellon Center 500 Grant Street Pittsburgh, PA 15219-2502 US
- 专利权人： Bayer Corporation
- 当前专利权人： Bayer Corporation
- 当前专利权人地址： One Mellon Center 500 Grant Street Pittsburgh, PA 15219-2502 US
- 代理机构： Klimiuk-Japadita, Meike
- 优先权： US676678 19910328
- 主分类号： C04B41/63
- IPC分类号： C04B41/63 ; C08G18/80 ; C08G18/28 ; C08G18/70
摘要：
The present invention is directed to a process for sealing and/or priming concrete by applying to concrete an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by
a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and
b) optionally reacting the dispersed polyisocyanate with
i) a primary or secondary monoamine containing at least one hydroxyl group in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or
ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0,
provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
The present invention is also directed to the primed and sealed concrete obtained in accordance with this process.
a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and
b) optionally reacting the dispersed polyisocyanate with
i) a primary or secondary monoamine containing at least one hydroxyl group in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.7:1.0 and/or
ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0:1.0 to 0.4:1.0,
provided that when components i) and ii) are both reacted with the dispersed polyisocyanate, component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0.
The present invention is also directed to the primed and sealed concrete obtained in accordance with this process.
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