Substituted benzophenones and their liquid mixtures suitable for use as photopolymerisation initiators
申请人:FRATELLI LAMBERTI S.p.A.
公开号:EP0209831A2
公开(公告)日:1987-01-28
As initiators for the photopolymerisation of ethylenically unsaturated compounds, the use of systems consisting of compounds of benzophenone type of formula I
In which R, R' and R2 are preferably alkyls of 1-4 carbon atoms, R3 and R4 are preferably hydrogen and Ar is preferably phenyl, in combination with donors of hydrogen or substances which determine the formation of labile photochemical complexes, such as alcohols, ethers and tertiary amines with hydrogens in the alpha position, and the use for the same purpose of mixtures of 2,4,6- trialkylbenzophenones and benzophenone and particularly of a mixture of 2,4,6-trimethylbenzophenone and benzophenone in a molar ratio of 1.155, which has the advantage of being liquid at temperatures exceeding 10°C and of possessing photochemical activity superior to that of benzophenone.
作为乙烯基不饱和化合物光聚合的引发剂,使用由式 I 的二苯甲酮类化合物组成的体系, 其中 R、R'和 R2 最好是 1-4 个碳原子的烷基,R3 和 R4 最好是氢,Ar 最好是苯基。
其中 R、R'和 R2 最好是 1-4 个碳原子的烷基,R3 和 R4 最好是氢,Ar 最好是苯基、为了同样的目的,使用 2,4,6-三烷基二苯甲酮和二苯甲酮的混合物,特别是 2,4,6-三甲基二苯甲酮和二苯甲酮的混合物,摩尔比为 1.155 的混合物,其优点是在温度超过 10°C 时呈液态,而且光化学活性优于二苯甲酮。