Radiation curable compositions for food packaging
US9550898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2014 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Sep 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/107
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An inkjet printing method includes the steps of jetting ink dots on a substrate of a plurality- of radiation curable inkjet inks having a viscosity of no more than 50 mPa·s at 25° C. and a shear rate of 90 s−1, the plurality of radiation curable inkjet inks including a) at least one non-polymerizable, non-polymeric bisacylphosphine oxide present in a concentration of no more than 4.0 wt % based on the total weight of radiation curable inkjet ink; b) at least one monomer including at least one vinyl ether group and at least one polymerizable group selected from the group consisting of an acrylate group -and a methacrylate group; and c) at least one polymerizable or polymeric thioxanthone, with the proviso that if the at least one polymerizable or polymeric thioxanthone contains no tertiary amine group that the radiation curable composition further includes at least one tertiary amine co-initiator selected from the group consisting of ethylhexyl-4-dimethylaminobenzoate, a polymerizable co-initiator containing a tertiary amine and a polymeric co-initiator containing a tertiary amine; and (2) fully curing the jetted ink dots using one or more UV LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.