Process for preparing waterless printing masters comprising copolymer of siloxane and crystallized thermoplastic blocks
US4096294A · kind A · utility
7Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Apr 4, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N1/003
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing a waterless printing master having a minimum background ink reflection density comprises coating a master substrate with an ink releasing block copolymer comprising elastomeric ink releasing siloxane blocks and isothermally crystallizable thermoplastic organic blocks. Thereafter, the thermoplastic blocks are isothermally crystallized and the siloxane blocks are preferably cross-linked. The printing master is imaged by depositing ink accepting particulate imaging material on the copolymer coating and heating and cooling the thermoplastic blocks to bond the particulate imaging material thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.