发明授权
- 专利标题： Process for the preparation of polyurethane powders
- 专利标题（中）： 制备聚氨酯粉末的方法
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申请号： US566017申请日： 1990-08-10
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公开(公告)号： US5061756A公开(公告)日： 1991-10-29
- 发明人: Tillmann Hassel , Hanns P. Muller , Hugo Vernaleken , Helmut Kipphardt , Rolf Dhein
- 申请人： Tillmann Hassel , Hanns P. Muller , Hugo Vernaleken , Helmut Kipphardt , Rolf Dhein
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX3928149 19890825
- 主分类号： C08J3/12
- IPC分类号： C08J3/12 ; C08G18/00 ; C08G18/08 ; C08G18/10
摘要：
The present invention is directed to an improved process for the direct preparation of polyurethane powders in a finely divided form by the reaction of polyisocyanates and isocyanate reactive compounds in a carrier phase, using interface active compounds, the improvement wherein the interface active compound used consists of at least one polymer of a urethane of (i) a long chain alkyl isocyanate and (ii) a hydroxyalkyl-acrylic or -metacrylic acid ester.