| 摘要 |
The present invention relates to thioxanthone-4-carboxylates, a method for the preparation of the compounds, photoinitiator compositions and use of them as photoinitiators. The compounds of the invention have a structure according to Formula ( I ) below:
in which:
each R 1 is independently selected from the group consisting of H, halogen, C 1 -C 12 alkyl, C 3 -C 6 cycloalkyl or C 1 -C 12 alkoxy;
R 2 and R 3 are independently selected from the group consisting of H, halogen, C 1 -C 18 alkyl, C 3 -C 6 cycloalkyl or C 1 -C 18 alkoxy;
Y is independently selected from the group consisting of C 1 -C 18 alkoxy or small molecular compounds containing 2-6 hydroxyl group;
m is a number from 1 to 6; and
X is
or
wherein R 4 and R 5 are each independently selected from the group consisting of H, halogen, C 1 -C 6 alkyl; a is a number from 1 to 6; b, d, e respectively represent a number from 1 to 25, c is a number from 1 to 5. The invention provides the compounds with the characters of low extraction, low migration and low volatility and use of them as photoinitiators in photo-polymerization, or package materials of medicine or food. As well, the raw materials of the invention are easily got, and the process of the invention is simple, so thioxanthone-4-carboxylate derivatives are suitable for industrial production.
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