首页> 外国专利> Lithographic printing plate mfr. - by forming protective hardened organo-polysiloxane layer on silicone layer, rendering unprotected areas oleophilic and removing protection

Lithographic printing plate mfr. - by forming protective hardened organo-polysiloxane layer on silicone layer, rendering unprotected areas oleophilic and removing protection

机译:平版印刷版。 -通过在有机硅层上形成保护性的硬化有机聚硅氧烷层,使未保护的区域变成亲油性并去除保护层

摘要

Process comprises (i) providing patterned protective layer, which is made of hardened layer of photohardening organopolysiloxane, on silicone layer coated on support; (ii) rendering specific areas of the silicone layer, where the protective layer is absent, oleophilic using active chemical species existing in plasma state; and (iii) peeling the protective layer off the silicone layer surface. Photohardening organopolysiloxane has surface tension of pref. 20-23 dyn/cm. Organopolysiloxane itself may have sensitive to light, or mixt. of silicone resin and light sensitive substance may be used for making protective layer. Thickness of protective layer is 1-5 mu m. Light sensitive organopolysiloxane is e.g. organopolysiloxane having siloxane unit to which maleimido, acryloxy, amido etc. is attached. Light sensitive substance to be mixed with silicone resin is e.g. azide, o-quinonediazide, cinnamic acid etc. Wettability of material for protecting layer to silicone layer is improved without lowering resolving power of light sensitive resin contained in the protective layer.
机译:方法包括:(i)在涂覆在载体上的有机硅层上提供由光硬化有机聚硅氧烷的硬化层制成的图案化保护层; (ii)使用存在于等离子体状态的活性化学物质,使缺少保护层的硅树脂层的特定区域具有亲油性; (iii)将保护层从硅树脂层表面剥离。光硬化有机聚硅氧烷的表面张力为优选。 20-23达因/厘米。有机聚硅氧烷本身可能对光或混合物敏感。可以使用有机硅树脂和光敏物质制成的保护层。保护层的厚度为1-5μm。光敏有机基聚硅氧烷是,例如。具有附接有马来酰亚胺,丙烯酰氧基,酰胺基等的硅氧烷单元的有机聚硅氧烷。与硅树脂混合的光敏物质是例如。叠氮化物,邻醌二叠氮化物,肉桂酸等。在不降低保护层中所含的光敏树脂的分辨能力的情况下,提高了用于保护层的材料对硅酮层的润湿性。

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