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Polymeric sensitizers for photopolymer composition
| Details |
Inventors: Dueber, Thomas E.; Monroe, Bruce M.;
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
Photopolymerizable composition consisting essentially of (A) at least one ethylenically unsaturated monomeric compound, (B) at least one 2,4,5-triarylimidazolyl dimer, (C) sensitizing amount of at least one polymeric sensitizer, weight average molecular weight 10,000 to 300,000, which is the reaction product of (1) a reactive photosensitizer and (2) a reactive polymer as defined herein, and (D) optionally an organic polymeric binder. The compositions are useful in photoresists, chemical milling, toning films and printing plates. |
|
DETAILED DESCRIPTION We claim: 1.
A photopolymerizable composition consisting essentially of (A) at least one nongaseous ethylenically unsaturated compound having at least one terminal ethylenically unsaturated group, a boiling point above 100.
degree.
C.
at normal atmospheric pressure and being capable of addition polymerization; (B) at least one 2,4,5-triarylimidazolyl dimer consisting of two lophine radicals bound together by a single covalent bond; (C) at least one polymeric sensitizer sensitive to ultraviolet or visible radiation and having a weight average molecular weight in the range of 10,000 to 300,000, the polymeric sensitizer being the reaction product of (1) a reactive sensitizer moiety of the formula: ##STR11## wherein R.
sub.
1 is alkyl of 1 to 12 carbon atoms: R.
sub.
2 is alkyl of 1 to 12 carbon atoms, --CH.
sub.
2 CH.
sub.
2 Cl; R.
sub.
3 is H, and with the proviso that when R.
sub.
2 is not --CH.
sub.
2 CH.
sub.
2 Cl, R.
sub.
3 can be one of --O(CH.
sub.
2 CH.
sub.
2 O).
sub.
n --CH.
sub.
2 CH.
sub.
2 OH, --O(CH.
sub.
2 CH.
sub.
2 CH.
sub.
2 O).
sub.
n --CH.
sub.
2 CH.
sub.
2 CH.
sub.
2 OH wherein n is 0 to 10, --OCH.
sub.
2 CH.
sub.
2 NH.
sub.
2, --(CH.
sub.
2).
sub.
n OH, --(CH.
sub.
2).
sub.
n NH.
sub.
2 wherein n is 1 to 12; and R.
sub.
4 is H, and with the proviso that when R.
sub.
2 is not --CH.
sub.
2 CH.
sub.
2 Cl and R.
sub.
3 is H, R.
sub.
4 is one of --O(CH.
sub.
2 CH.
sub.
2 O).
sub.
n --CH.
sub.
2 CH.
sub.
2 OH, --O(CH.
sub.
2 CH.
sub.
2 CH.
sub.
2 O).
sub.
n --CH.
sub.
2 CH.
sub.
2 CH.
sub.
2 OH wherein n is 0 to 10, --OCH.
sub.
2 CH.
sub.
2 NH.
sub.
2, --(CH.
sub.
2).
sub.
n OH, --(CH.
sub.
2).
sub.
n NH.
sub.
2 wherein n is 1 to 12; ##STR12## wherein Z is --CH.
sub.
2 --; --CH.
sub.
2 CH.
sub.
2 --; --CH.
sub.
2 O-- with oxygen bonded to the aromatic ring; R.
sub.
5 is alkyl of 1 to 12 carbon atoms; R.
sub.
6 is alkyl of 1 to 12 carbon atoms, --CH.
sub.
2 CH.
sub.
2 Cl; R.
sub.
7 is H, --OCH.
sub.
3, and with the proviso that when R.
sub.
6 is not --CH.
sub.
2 CH.
sub.
2 Cl, R.
sub.
7 can be one of --O(CH.
sub.
2 CH.
sub.
2 O).
sub.
n --CH.
sub.
2 CH.
sub.
2 OH, --O(CH.
sub.
2 CH.
sub.
2 CH.
sub.
2 O).
sub
|
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