The invention relates to novel photoinitiators of formula (I) wherein A is —O—, —CH
2−
, CH(CH
3
)— or —C(CH
3
)
2−
, and R is methyl or trimethylsilyl, and R may in addition be hydrogen when A is simultaneously the group —C(CH
3
)
2−
. The invention relates also to compositions comprising (A) at least one ethylenically unsaturated compound, (B) a photoinitiator of formula (I), (C) optionally further binders or additives, (D) optionally further photoinitiators or co-initiators. Compositions comprising (A) an ethylenically unsaturated compound that contains at least one aminoacrylate, (B) a photoinitiator of formula (II) or (III), (C) optionally further binders or additives, (D) optionally further photoinitiators or co-initiators.
本发明涉及式(I)的新型光
引发剂,其中A为—O—、—
CH2−、CH(
CH3)—或—C( )2−,R为甲基或三甲基
硅基,当A同时为基团—C( )2−时,R还可以是氢。本发明还涉及包括(A)至少一种
乙烯基不饱和化合物、(B)式(I)的光
引发剂、(C)可选的进一步粘合剂或添加剂、(D)可选的进一步光
引发剂或共同
引发剂的组合物。包括(A)至少一种含有至少一个
氨基
丙烯酸酯的
乙烯基不饱和化合物、(B)式(II)或(III)的光
引发剂、(C)可选的进一步粘合剂或添加剂、(D)可选的进一步光
引发剂或共同
引发剂的组合物。