申请人:——
公开号:US20020042022A1
公开(公告)日:2002-04-11
Compounds of the formula I
1
in which R
1
is C
1
-C
4
alkyl, R
2
is hydrogen, C
1
-C
4
alkyl or C
1
-C
4
alkoxy and R
3
, R
4
, R
6
and R
7
independently of one another are hydrogen, halogen, C
1
-C
20
alkyl, cyclopentyl, cyclohexyl, C
2
-C
12
alkenyl, C
2
-C
18
alkyl which is interrupted by one or more oxygen atoms, or are phenyl-substituted C
1
-C
4
alkyl, or are phenyl which is unsubstituted or is mono- or disubstituted by C
1
-C
4
alkyl and/or C
1
-C
4
alkoxy, with the provisos that at least one of the radicals R
3
, R
4
, R
5
, R
6
and R
7
is other than hydrogen and that, if R
1
and R
2
are methyl, R
3
and R
6
are not methyl, and mixtures of such compounds with &agr;-hydroxy ketones, benzophenones and &agr;-amino ketones, are suitable as photoinitiators.
化合物I1的公式为:其中R1为C1-C4烷基,R2为氢、C1-C4烷基或C1-C4烷氧基,R3、R4、R6和R7彼此独立地为氢、卤素、C1-C20烷基、环戊基、环己基、由一个或多个氧原子中断的C2-C18烷基,或为苯基取代的C1-C4烷基,或为未取代或被C1-C4烷基和/或C1-C4烷氧基单取代或双取代的苯基。但须满足至少有一个基团R3、R4、R5、R6和R7不是氢,如果R1和R2是甲基,则R3和R6不是甲基。这些化合物与α-羟基酮、苯甲酮和α-氨基酮的混合物适用于光引发剂。