| 摘要 |
<p>Thioxanthone derivatives of the general formula I <CHEM> wherein R<1> wherein R<1> represents a halogen atom or a C1-10 alkoxy group, R<2> and R<4> each represent a hydrogen atom, a halogen atom or a C1-C6 alkyl group, X represents oxygen or sulphur, and R<3> represents a C1-C10 alkyl group optionally substituted by a hydroxy group which hydroxy group may be alkylated by an optionally substituted C1-6 alkyl, C1-6 alkenyl or a benzyl group or acylated by a C1-8 alkanoyl or C1-8 alkenoyl group, a C1-10 alkenyl group, a C3-C6 cycloalkyl group, a C1-C8 alkanoyl group, a C1-8 alkenoyl group, an optionally substituted phenyl group, an optionally substituted benzyl group or an optionally substituted benzoyl group. Process for the preparation of the above thioxanthones, their use as photoinitiators, photopolymerisable compositions containing them, the use of such compositions for the production of photocured surface coating and products on which these photocured compositions have been applied.</p> |
