| 摘要 |
Microcapsules containing at least one leuco dye, at least one photopolymerisation initiator and at least one photopolymerisable monomer corresponding to the following formula A(-NHCO-X-L1-(OCO-CR1=CH2)1)m wherein A stands for a 3- to 6-valent organic group having the following meanings: a) a saturated hydrocarbon group having 5 to 25 carbon atoms or b) (* CHEMICAL STRUCTURE *) or c) (* CHEMICAL STRUCTURE *) wherein A1, A2, R3, R4, o and p have the meanings indicated in the description, X denotes O or NR2, L1 denotes a divalent or trivalent aliphatic hydrocarbon group whose carbon chain may be interrupted by 1 to 3 oxygen atoms, R1 denotes hydrogen or methyl, R2 denotes hydrogen or C1-C4-alkyl, l denotes 1 or 2 and m denotes a number from 3 to 6, are distinguished by improved sensitivity.
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