A conductive sheet supports an interlayer and a photoconductive photoreceptive layer in that order, with the interlayer containing at least one colloidal substance selected from colloidal silica and colloidal alumina, and an organic solvent soluble resin which is composed of
(A) a polymer having an acid value of from 10 to 100 and containing repeating units represented by formula (I) and (II)
wherein R1 represents H or CH3; R2 represents H, -CH3, - C2H5, or a chloromethyl group; and n represents an integer of 1 to 10;
wherein R3 represents H or-CH3; and
(B) at least one polymer selected from a homopolymer and a plural copolymer having a glass transition point (Tg) offrom -70 to 20 °C. It can be utilized as a lithographic printing material having long press life.
导电片依次支撑着中间层和光电导光敏层,中间层含有至少一种从胶体
二氧化硅和胶体氧化铝中选出的胶体物质,以及一种有机溶剂可溶
树脂,该
树脂由以下部分组成
(A) 酸值为 10 至 100 且含有式(I)和(II)所代表的重复单元的聚合物; (B) 酸值为 10 至 100 且含有式(I)和(II)所代表的重复单元的聚合物。
其中 R1 代表 H 或
CH3;R2 代表 H、- 、-
C2H5 或
氯甲基;n 代表 1 至 10 的整数;
其中 R3 代表 H 或- ;以及
(B) 至少一种选自均聚物和多元共聚物的聚合物,其
玻璃化转变点(Tg)为 -70 至 20°C。它可用作平版印刷材料,印刷寿命长。