Copolymers useful for the preparation of thermal digital lithographic printing plates
申请人:Kodak Polychrome Graphics Company Ltd.
公开号:EP1506983A2
公开(公告)日:2005-02-16
A thermally imageable element is disclosed. The element made up of a substrate and a composite layer structure composed of two layer coatings. Preferably, the first layer of the composite is composed of an aqueous developable polymer mixture containing a solubility inhibiting material and a photothermal conversion material which is contiguous to the hydrophilic substrate. The second layer of the composite is insoluble in the aqueous solution, is ink receptive, and is composed of one or more non-aqueous soluble polymers which are soluble or dispersible in a solvent which does not dissolve the first layer. The second layer may also contain a photothermal conversion material. Alternatively, the composite layer may be free of photothermal conversion material when thermal imaging is carried out using a thermal printing head.
本发明公开了一种热成像元件。该元件由基底和由两层涂层组成的复合层结构构成。复合材料的第一层最好由水性可显影聚合物混合物组成,该混合物含有溶解性抑制材料和光热转换材料,与亲水性基底相邻。复合材料的第二层不溶于水溶液,可接受油墨,由一种或多种非水溶性聚合物组成,这些聚合物可溶于或分散于不溶解第一层的溶剂中。第二层也可以包含光热转换材料。或者,在使用热打印头进行热成像时,复合层可以不含光热转换材料。