公开(公告)号：US20040072940A1

公开(公告)日：2004-04-15

申请号：US10672413

申请日：2003-09-26

申请人： Ferrania, S.p.A., Recordation

发明人： Paola Franceschini

IPC分类号： C08J003/00

CPC分类号： G03C7/3029 ,  C08F2/24 ,  G03C1/7614 ,  G03C1/95 ,  G03C2001/7635

摘要： The present invention relates to a process for synthesizing a particulate copolymer comprising: providing a reaction mixture comprising a reaction medium, a polymerization stabilizer, a water-insoluble ethylenically unsaturated monomer and an ethylenically unsaturated monomer containing hydrophilic functionality, said reaction mixture having a viscosity value of at least 10 cps measured at 40null C., and polymerizing the water-insoluble ethylenically unsaturated monomer and the ethylenically unsaturated monomer containing hydrophilic functionality. The polymerization reaction is preferably conducted at a temperature lower than 100null C. and activated by a polymerization catalyst. The resulting particulate copolymer dispersion comprises copolymer particles showing a weight average diameter size in the range of microns and absence of defects, such as coagulant or agglomerates. The present invention also provides a dispersion of a particulate copolymer obtained by using the process described above and a photographic material comprising a support and at least one layer containing a particulate copolymer obtained by using the process described above. The photographic material presents improved physical and optical performance.

摘要翻译： 本发明涉及一种合成颗粒状共聚物的方法，包括：提供包含反应介质，聚合稳定剂，不溶于水的烯键式不饱和单体和含有亲水性官能团的烯属不饱和单体的反应混合物，所述反应混合物具有粘度值 在40℃下测量至少10cps，并且聚合水不溶性烯键式不饱和单体和含有亲水官能团的烯属不饱和单体。 聚合反应优选在低于100℃的温度下进行，并通过聚合催化剂活化。 所得到的颗粒状共聚物分散体包括共聚物颗粒，其显示重量平均直径尺寸在微米范围内并且没有缺陷，例如凝结剂或附聚物。 本发明还提供了通过使用上述方法获得的颗粒状共聚物的分散体和包含载体和至少一层含有通过使用上述方法获得的颗粒状共聚物的照相材料的分散体。 照相材料具有改善的物理和光学性能。