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|
.alpha.-aminoacetophenone photoinitiators
| Details |
Inventors: Ohwa, Masaki; Yamoto, Hitoshi; Birbaum, Jean-Luc; Nakashima, Hiroko; Matsumoto, Akira; Oka, Hidetaka;
Assignee: Ciba Specialty Chemicals Corporation (Tarrytown, NY)
Primary Examiner: Berman; Susan W.
Assistant Examiner:
Attorney, Agent or Firm: Hall; Luther A. R., Crichton; David R.
Compounds of the formulae I, II, III and IV ##STR1## wherein Ar for example is a phenyl, biphenyl or benzoylphenyl group, which is unsubstituted or substituted; Ar.sub.1, for example, has the same meanings as Ar; Ar.sub.2 is inter alia phenyl; X may be a direct bond; Y hydrogen, etc.; R.sub.1 and R.sub.2 for example C.sub.1 -C.sub.8 alkyl; R.sub.3 inter alia hydrogen or C.sub.1 -C.sub.12 alkyl; R.sub.4 is inter alia C.sub.1 -C.sub.12 alkyl; or R.sub.3 and R.sub.4 together are C.sub.3 -C.sub.7 alkylene; R.sub.5 is for example C.sub.1 -C.sub.6 alkylene; and Z is a divalent radical; provided that at least one of the radicals Ar, Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 or Y is substituted by 1 to 5 SH groups, or provided that Y contains at least one --SS-- group, are photoinitiators for the polymerization of ethylenically unsaturated compounds. |
|
DETAILED DESCRIPTION What is claimed is: 1.
Compounds of the formula I, II, III or IV wherein a is an integer 1, 2 or 4; Ar is a phenyl, biphenyl or benzoylphenyl group, which is unsubstituted or substituted by 1 to 5 of the radicals halogen, C.
sub.
1 -C.
sub.
12 alkyl, C.
sub.
3 -C.
sub.
12 alkenyl, C.
sub.
5 -C.
sub.
6 cycloalkyl, phenyl-C.
sub.
1 -C.
sub.
3 alkyl, --COOH, --COO(C.
sub.
1 -C.
sub.
4 alkyl), --OR.
sub.
7, --SH, --SR.
sub.
8, --SOR.
sub.
8, --SO.
sub.
2 R.
sub.
8, --CN, --SO.
sub.
2 NH.
sub.
2, --SO.
sub.
2 NH(C.
sub.
1 -C.
sub.
4 alkyl), --SO.
sub.
2 --N(C.
sub.
1 -C.
sub.
4 alkyl).
sub.
2, --NR.
sub.
9 R.
sub.
10, --NHCOR.
sub.
9, or by a group of the formula V, ##STR47## or Ar is a group of the formula VI or VII ##STR48## Ar.
sub.
1 if a is 1 has the same meanings as Ar; if a is 2, Ar.
sub.
1 is a divalent aromatic radical of the formula VIII or VIIIa ##STR49## if a is 4, Ar.
sub.
1 is a tetravalent aromatic radical of the formula VIIIb ##STR50## Ar.
sub.
2 is ##STR51## these groups are unsubstituted or substituted by 1 to 5 of the radicals halogen, C.
sub.
1 -C.
sub.
12 alkyl, C.
sub.
3 -C.
sub.
12 alkenyl, C.
sub.
5 -C.
sub.
6 cycloalkyl, phenyl-C.
sub.
1 -C.
sub.
3 alkyl, --COOH, --COO(C.
sub.
1 -C.
sub.
4 alkyl), --OR.
sub.
7, --SH, --SR.
sub.
8, --SOR.
sub.
8, --SO.
sub.
2 R.
sub.
8, --CN, --SO.
sub.
2 NH.
sub.
2, --SO.
sub.
2 NH(C.
sub.
1 -C.
sub.
4 alkyl), --SO.
sub.
2 --N(C.
sub.
1 -C.
sub.
4 alkyl).
sub.
2, --NR.
sub.
9 R.
sub.
10, --NHCOR.
sub.
9, or by a group of the formula V as defined above, or Ar.
sub.
2 is a group of the formula VIa or VIIa ##STR52## X is a direct bond, --O--, --S-- or --N(R.
sub.
6)--; Y is hydrogen, C.
sub.
1 -C.
sub.
12 alkyl, which is unsubstituted or substituted by 1 to 5 OH, OR.
sub.
6, COOR.
sub.
6, SH, N(R.
sub.
6).
sub.
2 or halogen or substituted 1 to 5 times by a group of the formula Ia ##STR53## or Y is C.
sub.
2 -C.
sub.
20 alkyl, which is interrupted by 1 to 9 --O--, --N(R.
sub.
6)--, --S--, --SS--, --X--C(.
dbd.
O)--, --X--C(.
dbd.
S)--, --C(.
dbd.
O)--X--, --X--C(.
dbd.
O)--X--, --C(.
dbd.
S)--X--, ##STR54## wherein the interrupted C.
sub.
2 -C.
sub.
20 alkyl can further be substituted by 1 to 5 SH, or Y is benzyl which is unsubstituted or substituted once or twice by --CH
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