公开(公告)号：US4822770A

公开(公告)日：1989-04-18

申请号：US63100

申请日：1987-06-17

申请人： Arun Sud ,  Sankar K. Paul

发明人： Arun Sud ,  Sankar K. Paul

IPC分类号： B41M5/132 ,  B41M5/14 ,  B41M5/22

CPC分类号： B41M5/132 ,  Y10S428/914 ,  Y10T428/2984 ,  Y10T428/2985 ,  Y10T428/2987

摘要： Carbonless copy paper is prepared by placing a first sheet of paper coated on one side with a hydrophilic colloid solution in which are dispersed microcapsules of oil droplets containing a colorless electron donor dye into contact with a second sheet of paper coated with an absorbent and an electron accepting color developer compound. The heat resistance and moisture resistance of the copy paper is substantially improved by adding to the hydrophilic colloid solution a graft copolymer having a backbone of carboxymethyl cellulose or gum arabic and side chains of polyacrylic acid or polymethacrylic acid. The image response time of the second sheet can be improved by adding pectin or sulfated starch to the coating.

摘要翻译： 无碳复写纸是通过将一面涂布在其上的第一张纸与亲水胶体溶液一起制备的，其中分散有包含无色电子供体染料的油滴的微胶囊与涂覆有吸收剂和电子的第二张纸接触 接受彩色显影剂复合物。 通过向亲水胶体溶液中加入具有羧甲基纤维素或阿拉伯胶主链和聚丙烯酸或聚甲基丙烯酸侧链的接枝共聚物，可显着提高复印纸的耐热性和耐湿性。 可以通过向涂层中加入果胶或硫酸化淀粉来改善第二片的图像响应时间。