Ultraviolet hardening type ink compositions with a temperature-sensitive color change property
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United States of America Patent
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Dec 28, 1999
Grant Date -
N/A
app pub date -
Nov 18, 1997
filing date -
Nov 25, 1996
priority date (Note) -
Expired
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Abstract
[Problem] To provide ultraviolet hardening type ink compositions with a temperature-sensitive color change property, which has both the hardening property and the printing strength of UV ink and also has an excellent light resistance. [Solution] Ultraviolet hardening type ink compositions comprising microcapsules with a temperature-sensitive color change property and a photopolymerization initiator, wherein said microcapsules contain no ultraviolet absorber and have the mean diameter of 0.5-50 .mu.m whereas said photopolymerization initiator comprises at least one of the compounds selected from ace tophenone type compounds and benzophenone type compounds.
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