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为防止感光材料粘连,历来多在其表面涂布含有毛面剂或腊状物质的保护层。然而,它们有如下弊病:使用毛面剂时,加入量少,无防粘连效果;加入量多,则损害感光材料的透明度,影响照相性能。使用腊状物质,对照相性能的影响更坏,如灰雾增大、减感等等。上述保护层在高温、高湿环境下,无稳定的防粘连效果。本专利提供了能克服上述弊病的防粘连保护层。该保护层的主要成分是,分子侧链上带有胍代胺基或胍代亚胺基的聚合物。通式:
In order to prevent the photosensitive material from sticking, it has always been coated with a protective layer containing a matting agent or a wax-like substance on its surface. However, they have the following drawbacks: When using the matting agent, the amount added is small and there is no anti-blocking effect. When the amount is added, the transparency of the photosensitive material is impaired and the photographic performance is affected. The use of waxy materials, the performance of the photographic worse, such as increased fog, desensitization and so on. The protective layer in the high temperature, high humidity environment, no stable anti-adhesion effect. This patent provides an anti-blocking protective layer that overcomes the above drawbacks. The main component of the protective layer is a polymer having a guanidine group or a guanidinium group on the side chain of the molecule. general formula: