公开(公告)号：US4510186A

公开(公告)日：1985-04-09

申请号：US517437

申请日：1983-07-26

申请人： Katsumi Kuriyama ,  Isao Kondo ,  Iwao Misaizu

发明人： Katsumi Kuriyama ,  Isao Kondo ,  Iwao Misaizu

IPC分类号： B32B5/18 ,  C08J3/09 ,  C08J9/00 ,  C08J9/28 ,  C08L75/04 ,  C09D175/04 ,  D06M15/564 ,  D06N3/14 ,  B05D3/02

CPC分类号： C08J9/283 ,  C08J3/091 ,  C08L75/04 ,  C09D175/04 ,  D06M15/564 ,  D06N3/14 ,  D06N3/141 ,  C08J2375/04 ,  Y10S428/904 ,  Y10T428/31551

摘要： A process for preparing a porous sheet material, which comprises impregnating and/or coating on a substrate a water-in-oil type polyurethane emulsion (d) comprising a hydrophobic polyurethane (a), a hydrophilic polyurethane (b), and organic solvent (c) and water, and drying it, characterized in that said hydrophobic polyurethane (a) is a hydrophobic polyurethane dispersion (e) obtained by reacting a hydrophobic polyol, an organic diisocyanate and a chain extender is an organic solvent (c) which has a limited compatibility with water and in which the polyurethane thereby formed is substantially insoluble; said hydrophilic polyurethane (b) is a polyurethane containing about 20 to about 40% by weight, based on the total polymer, of polyoxyethylene groups; and the weight ratio of (a):(b) is about 90-99: about 10-1.

摘要翻译： 一种制备多孔片材的方法，其包括在基材上浸渍和/或涂布包含疏水性聚氨酯（a），亲水性聚氨酯（b）和有机溶剂（d）的油包水型聚氨酯乳液（d） c）和水，并干燥，其特征在于所述疏水性聚氨酯（a）是疏水性多元醇，有机二异氰酸酯和扩链剂通过使疏水性聚氨酯分散体（e）是有机溶剂（c） 与水的相容性受限，其中由此形成的聚氨酯基本上不溶; 所述亲水性聚氨酯（b）是聚氨酯，其占总聚合物的约20至约40重量％，聚氧乙烯基团; （a）：（b）的重量比为约90-99：约10-1。