| 摘要 |
Sulphonium salts of the formula …<IMAGE>… in which R<1>, R<2> and R<3> are identical to or different from one another and represent aliphatic and/or aromatic radicals which may contain heteroatoms, or two of the radicals R<1> to R<3> are linked to one another to form a ring, with the proviso that at least one of the radicals R<1> to R<3> contains at least one grouping cleavable by acid or one of the radicals R<1> to R<3> is linked to one or more further sulphonium salt radicals, if desired via groupings cleavable by acid, and X<(-)> denotes a non-nucleophilic counterion… are suitable as photoinitiators for cationic polymerisation. |
