Lithographic printing plate precursors and stacks
US8383319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | May 14, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C2210/262
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Lithographic printing plate precursors have been designed so that they can be stored, shipped, and used in stacks without interleaf paper between individual precursors. This is achieved by incorporating polymeric particles having an average diameter of from about 3 to about 20 μm into the outermost precursor layer such as an imagable layer or topcoat. The polymeric particles comprise a core of a crosslinked polymer and have grafted hydrophilic polymeric surface groups that are grafted onto the particle surfaces by polymerizing hydrophilic monomers in the presence of the crosslinked polymeric particles. The lithographic printing plates can be either negative- or positive-working elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.