公开(公告)号：US4778781A

公开(公告)日：1988-10-18

申请号：US936308

申请日：1986-12-01

申请人： Shintarou Washizu ,  Keiso Saeki ,  Sumitaka Tatsuta

发明人： Shintarou Washizu ,  Keiso Saeki ,  Sumitaka Tatsuta

IPC分类号： B01J13/16 ,  B01J13/18 ,  B01J13/22 ,  B41M5/165 ,  B01J13/02 ,  B41M5/22

CPC分类号： B01J13/16 ,  B01J13/18 ,  B01J13/22 ,  B41M5/165 ,  Y10S428/914 ,  Y10T428/2985

摘要： Microcapsules, a process for preparing the same, and a pressure-sensitive recording paper containing the same are disclosed. The microcapsules are prepared by a process which comprises polymerizing melamine and formaldehyde, or polymerizing initial condensates of melamine and formaldehyde, around hydrophobic oil droplets containing a polyisocyanate or a prepolymer of polyisocyanate, wherein a polyhydroxy compound is incorporated into said hydrophobic oil droplets prior to microencapsulation, thereby producing a sturdy double wall made of of polyurethaneurea film (inner wall) and melamine/formaldehyde resin film (outer wall).

摘要翻译： 公开了微胶囊，其制备方法和含有该微胶囊的压敏记录纸。 通过包括聚合三聚氰胺和甲醛或聚合三聚氰胺和甲醛的初始缩合物的方法在包含多异氰酸酯或多异氰酸酯的预聚物的疏水性油滴之下的方法制备微胶囊，其中在微胶囊化之前将多羟基化合物并入所述疏水性油滴中 ，由此生成由聚氨酯脲膜（内壁）和三聚氰胺/甲醛树脂膜（外壁）构成的坚固的双壁。