Ultraviolet curable inkjet ink
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United States of America Patent
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Jan 9, 2024
Grant Date -
Jan 5, 2023
app pub date -
Aug 11, 2021
filing date -
Dec 25, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
By use of an ultraviolet curable inkjet ink comprising a colorant, a polymerizable monomer having a specific structure, ethoxyphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, and at least one type selected from the group consisting of an acylphosphine oxide photopolymerization initiator different than the ethoxyphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, a benzophenone photopolymerization initiator, and an indane photopolymerization initiator, wherein the ratio of the content of the polymerizable monomer having the specific structure and the content of the ethoxyphenyl(2,4,6-trimethylbenzoyl)phosphine oxide is 2:1 to 8.5:1 by mass ratio, the content of a monofunctional monomer in the ultraviolet curable inkjet ink is 25% by mass or less, a printed matter having curability and coating film flexibility can be obtained regardless of the amount applied to a recording medium, and the discharge stability is also excellent.
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