公开(公告)号：US5281629A

公开(公告)日：1994-01-25

申请号：US15728

申请日：1993-02-10

申请人： Wieland Hovestadt ,  Lothar Kahl ,  Juergen Meixner ,  Christian Wamprecht ,  Volker Schneider ,  Manfred Schoenfelder

发明人： Wieland Hovestadt ,  Lothar Kahl ,  Juergen Meixner ,  Christian Wamprecht ,  Volker Schneider ,  Manfred Schoenfelder

IPC分类号： B05B15/04 ,  C08G18/00 ,  C08G18/08 ,  C08G18/82 ,  C08J11/00 ,  C08J11/04 ,  C09D5/03 ,  C09D5/46 ,  C09D7/00 ,  C09D7/14 ,  C09D175/00 ,  C09D175/04 ,  C08G18/14

CPC分类号： C09D7/008 ,  C08J11/00

摘要： The present invention relates to a process for recovering and recycling the organic binder components accumulating during the spraying of a solvent-containing, two-component polyurethane coating or a solvent-containing, moisture-curing one-component polyurethane coating byi) forming a coatings slurry containing the organic binder components, water and a coagulating agent,ii) mixing the coatings slurry, optionally after removing a portion of the water, with an organic solvent which is inert towards isocyanate groups,iii) reacting the free isocyanate groups present in the mixture obtained in step (ii) with a compound containing one isocyanate-reactive group which is more reactive with isocyanate groups than both water and the isocyanate-reactive component of the two-component polyurethane coating, if present, andiv) removing any remaining water and insoluble components from the organic phase accumulating in step (iii) and recovering the organic phase containing the organic binder components.

摘要翻译： 本发明涉及一种在含有溶剂的双组分聚氨酯涂层或含溶剂的湿固化单组分聚氨酯涂层中积累的有机粘合剂组分的回收和再循环方法，该方法为：i）形成涂层 含有有机粘合剂组分的浆料，水和凝结剂，ii）任选地在除去一部分水之后将涂料浆料与对异氰酸酯基团呈惰性的有机溶剂混合，iii）使存在于 （ii）中得到的混合物与含有一个与异氰酸酯基反应的异氰酸酯反应性基团的化合物比双组分聚氨酯涂层的水和异氰酸酯反应性组分（如果存在）和iv）除去任何剩余的水 和来自步骤（iii）中积累的有机相的不溶性组分，并回收含有有机粘合剂的有机相 贱人