Method of improving light stability of flexographic printing plates featuring flat top dots
US10599035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2017 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Apr 15, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N1/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photocurable relief image printing blank comprising: (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: i) a binder; ii) one or more monomers; iii) an alpha-aminoketone photoinitiator; and optionally, iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. Upon exposure and development, the resulting relief image printing element does not degrade if left under ambient lights for an extended period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.