Radiation curable compositions
AssigneeAgfa Graphics NV
InventorsJohan Loccufier, Luc Vanmaele, Jaymes Van Luppen, Roland Claes, Yu Chen, Holger Frey
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Abstract
A novel polymeric initiator is disclosed comprising a dendritic polymer core with at least one initiating functional group as an end group. The dendritic polymeric core is preferably a hyperbranched polymer. The polymeric initiators are useful in radiation curable compositions such as varnishes, lacquers and printing inks and are especially useful in radiation curable inkjet inks.
Claims11
The radiation curable composition comprising a radiation curable compound and a polymeric initiator comprising a dendritic polymer core with at least one initiating functional group as an end group and wherein the radiation curable composition is a radiation curable inkjet ink, wherein the at least one initiating functional group is selected from the group consisting of benzoinethers, benzil ketals, α,α-dialkoxyacetophenones, α-hydroxyalkylphenones, α-aminoalkylphenones, acylphosphine oxides, acylphosphine sulfides, α-haloketones, α-halosulfones, α-halophenylglyoxalates, benzophenones, thioxanthones, 1,2-diketones and anthraquinones, and wherein said dendritic polymer core is a polymer mer core.
A process for polymerization of monomers, oligomers and/or prepolymers comprising the steps of:
- a) providing a polymeric initiator, and
- b) mixing the said polymeric initiator with monomers, oligomers and/or prepolymers, wherein said polymeric initiator comprises a dendritic polymer core with at least one initiating functional group, wherein the at least one initiating functional group is selected from the group consisting of benzoinethers, benzil ketals, α,α-dialkoxyacetophenones, α-hydroxyalkylphenones, α-aminoalkylphenones, acylphosphine oxides, acylphosphine sulfides, α-haloketones, α-halosulfones, α-halophenylglyoxalates, benzophenones, thioxanthones, 1,2-diketones and anthraquinones, and wherein said dendritic polymer core is a hyperbranched polymer core.
A process for providing an imaged article comprising the steps of:
- a) providing a radiation curable inkjet ink,
- b) jetting said radiation curable inkjet ink on an ink jet recording element selected from the group consisting of paper, coated paper, polyolefin coated paper, cardboard, wood, composite boards, plastic, coated plastic, canvas, textile, metal, glasses, plant fibre products, leather, magnetic materials and ceramics,
- wherein said imaged article contains a polymeric initiator having a dendritic polymer core with at least one initiating functional group, wherein the at least one initiating functional group is selected from the group consisting of benzoinethers, benzil ketals, α,α-dialkoxyacetophenones, α-hydroxyalkylphenones, α-aminoalkylphenones, acylphosphine oxides, acylphosphine sulfides, α-haloketones, α-halosulfones, α-halophenylglyoxalates, benzophenones, thioxanthones, 1,2-diketones and anthraquinones, and wherein said dendritic polymer core is a hyperbranched polymer core.
Dependencies are inferred from the claim text.