Electrophotographic lithographic printing plate
US4427754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1982 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Mar 4, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed an electrophotographic lithographic printing plate having a precoat layer having improved water resistance and organic solvent resistance and an improved photoconductive layer which comprises: PA1 (1) a paper base; PA1 (2) a precoat layer on one side of said paper base, which precoat layer contains at least PA2 (a) 10% by weight or less (based on total solids) of a film-forming water-soluble polymer, PA2 (b) about 30 to about 80% by weight (based on total solids content) of a water-dispersible resin, and PA2 (c) an inorganic pigment; PA1 (3) a photoconductive layer provided on said precoat layer, which photoconductive layer contains PA2 (a) photoconductive zinc oxide, and PA2 (b) at least 2 binder resins different in acid value from each other by 5 or more, said mixed binder resins in the photoconductive layer having an average acid value of 5 to 30; and PA1 (4) a conductive back-coat layer on the other side of said paper base, which back-coat contains at least PA2 (a) 10% by weight or less (based on total solids) of a film-forming water-soluble polymer, PA2 (b) a water-dispersible resin, and PA2 (c) a conductive agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.