A process for preparing pressure-sensitively adhesive polyacrylates by free-radical addition polymerization, characterized in that mercapto-functionalized photoinitiators of the general formula (I) and/or (II).
H—S—R (I)
R—S—S—R′ (II)
are added to the monomer mixture or to the reaction mixture, R and R′ being chosen independently of one another from the following groups:
a) benzophenone, acetophenone, benzil, benzoin, hydroxyalkylphenone, phenylcyclohexyl ketone, anthraquinone, thioxanthone, triazine, or fluorenone radicals, it being possible for each of these radicals to be substituted by one or more halogen atoms and/or one or more alkoxy groups and/or one or more amino groups or hydroxyl groups,
b) radicals which comprise one or more of the substituted or unsubstituted radicals specified under a).
一种通过自由基加成聚合制备压敏粘合剂聚
丙烯酸酯的方法,其特征在于向单体混合物或反应混合物中添加通式(I)和/或(II)的巯基功能化光
引发剂。其中R和R'分别独立地选择以下基团:a)苯基酮,
乙酰苯,苯并二酮,苯并
酚,羟基烷基苯酮,苯基环己基酮,
蒽醌,
噻吩酮,三嗪或
芴酮基团,每个基团都可以被一个或多个卤素原子和/或一个或多个烷氧基团和/或一个或多个
氨基或羟基团取代,b)包括在a)中指定的一个或多个取代或未取代基团的基团。