Electrophotographically sensitive material for a litho printing plate
US4719162A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | May 28, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic litho printing plate material which has a high storage stability and is useful for providing litho printing plates having an enhanced high quality image-forming durability, an improved printing durability, and an excellent dimensional stability, comprises (A) a substrate sheet; (B) an intermediate coating layer comprising (a) wet ground white mica fine particles having an average size of 5 to 50 .mu.m, (b) a waterproofing agent comprising an organic silane compound of the formula (1): R.sub.n SiX.sub.4-n (1) wherein n=1 or 2, R=aliphatic, cycloaliphatic, aromatic or heterocyclic radical having 1 to 30 carbon atoms, at least one R being chemically reactive, and X=hydrolyzable substituent, and (c) a thermoplastic resin binder; and (C) a photoconductive coating layer containing photoconductive pigment particles and an electrically insulating polymeric binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.