Photopolymerizable compositions having acyl or diacyl phosphine oxide and a fluorescent optical brightner
AssigneeBayer Aktiengesellschaft
InventorWojciech A. Wilczak
Life of this patent
Estimating the term…
Abstract
The present invention relates a photopolymerizable composition which comprises: A) one or more ethylenically unsaturated, free-radical polymerizable monomers; B) one or more organic binders; and C) one or more photoinitiators, wherein the photoinitiator is an acyl or diacyl phosphine oxide, in combination with a fluorescent optical brightener; and a process for producing such a photopolymerizable composition.
Claims23
A photopolymerizable composition which comprises:
- A) one or more ethylenically unsaturated, free-radical polymerizable monomers;
- B) one or more organic binders;
- and
- C) one or more photoinitiators, wherein the photoinitiator is an acyl or diacyl phosphine oxide, in combination with a fluorescent optical brightener selected from the group consisting of 2,2'-(thiophenediyl)-bis-(t-butyl benzoxazole);
- 2-(stibyl-4")-(naphtho-1',2',4,5)-1,2,3-triazole-2"-sulfonic acid phenyl ester;
- 7-(4'-chloro-6"-diethylamino-1',3',5'-triazine-4'-yl)amino-3-phenyl coumarin;
- wherein said optical brightener is present in an amount sufficient to enhance the photosensitivity of the acyl or diacyl phosphine oxide.
A process for enhancing the photosensitivity of a photopolymerizable composition which composition comprises an admixture of:
- A) one or more ethylenically unsaturated, free-radical polymerizable monomers;
- B) one or more organic binders;
- and
- C) an acyl or diacyl phosphine oxide compound, the process comprising combining with said admixture a fluorescent optical brightener selected from the group consisting of 2,2'-(thiophenediyl)-bis-(t-butyl benzoxazole);
- 2-(stibyl-4")-(naphtho-1',2',4,5)-1,2,3-triazole-2"-sulfonic acid phenyl ester;
- 7-(4'-chloro-6"-diethylamino-1',3',5'-triazine-4'-yl)amino-3-phenyl coumarin;
- wherein said optical brightener is present in an amount sufficient to enhance the photosensitivity of the acyl or diacyl phosphine oxide.
A process for enhancing the photosensitivity of an acyl or diacyl phosphine oxide compound comprising combining with said acyl or diacyl phosphine oxide compound a fluorescent optical brightener selected from the group consisting of 2,2'-(thiophenediyl)-bis-(t-butyl benzoxazole);
- 2-(stibyl-4")-(naphtho-1',2',4,5)-1,2,3-triazole-2"-sulfonic acid phenyl ester;
- and 7-(4'-chloro-6"-diethylamino-1',3',5'-triazine-4'-yl)amino-3-phenyl coumarin, wherein said optical brightener is present in an amount sufficient to enhance the photosensitivity of the acyl or diacyl phosphine oxide.
Dependencies are inferred from the claim text.