Eastman-kodak Company

Lal C Vishwakarma

Hwei-Ling Yau

Glenn M Brown

Anthony Adin

Tienteh M Chen

Samir Y Farid

Annabel A Muenter

Paul A Zielinski

Jerome Robert Lenhard

Ian R Gould

Stephen A Godleski

Jerome J Looker

Victor LaVonne Mylroie

Barry Francis Briffa

Chin H Chen

Edward Schofield

Tien-Teh Chen

Thomas R Dobles

Louis F Valente

Tienteh T Chen

A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula:

Silver halide light sensitive emulsion layer having enhanced photographic sensitivity

A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula: ##STR1## wherein A is a silver halide adsorptive group that contains at least one atom of N, S, Se, or Te that promotes adsorption to silver halide, and Z is a light absorbing group including for example cyanine dyes, complex cyanine dyes, merocyanine dyes, complex merocyanine dyes, homopolar cyanine dyes, styryl dyes, oxonol dyes, hemioxonol dyes, and hemicyanine dyes, and XY is an fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein:

Silver halide light sensitive emulsion layer having enhanced

An ultraviolet absorbing compound of formula (I) below, and photographic elements containing such a compound as an ultraviolet absorber: ##STR1## wherein: R.sub.1 -R.sub.4 independently is a hydrogen atom, a halogen atom such as fluoro, chloro, bromo, iodo or a combination thereof; a carbalkoxy group having at least one asymmetric carbon or asymmetric silicon atom; an alkoxy group having at least one asymmetric carbon or asymmetric silicon atom, with the proviso that R.sub.2 or R.sub.3, or both R.sub.2 and R.sub.3 are other than hydrogen;

Benzotriazole-based novel UV absorbers and photographic elements

This invention relates to a photographic element containing a polymeric ultraviolet absorbing polymer fromed from an ultraviolet absorbing monomer of formula (I): ##STR1## where X is a bivalent linking group, and Y contains an ethylenically unsaturated functional group.

Photographic element containing ultraviolet absorbing polymer

A process for the preparation of photographic binary sensitizing dyes, which comprise two separate, nonconjugated chromophores, one of which has the capability of adsorbing to a silver halide grain surface, the other of which is substantially non-adsorbing to silver halide. The process comprises reacting two dye compounds in a solvent in the presence of a 2-halo-1-alkylpyridinium salt and a 4-dialkylaminopyridine.

Process for the preparation of binary sensitizing dyes

A method for preparing a compound of formula (III): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, L, Z and p are as defined in the specification; said process preferably comprising either a noble metal catalyzed hydrogenation or a non-catalytic reductive ring closure of an azo dye compound of formula (IV): ##STR2## where R11 is as defined in the specification, thereby performing a reductive ring closure and selective O-deacylation in a single process step.

Method of synthesizing tert-amido-substituted 2-(2'-hydroxyphenyl)

An ultraviolet absorbing compound of formula (I) below, and photographic elements containing such a compound as an ultraviolet absorber: ##STR1## wherein: R.sub.4 is a substituted alkyl group, R.sub.4 may be further joined to either L or A* forming a ring and the benzo or phenyl ring shown may be further substituted or unsubstituted;

Benzotriazole-based UV absorbers and photographic elements containing

A photographic element comprising a light sensitive portion and an ultraviolet absorbing polymer comprising repeating units of a 2'-hydroxphenyl benzotriazole with a 5- or 6-substituent selected from halogen, cyano, carboxy or a sulfonyl, and a 4'-alkoxy group in which the alkylene portion of the alkoxy is linked, in sequence through a first optional bivalent linking group, then an oxygen, sulfur or amino group, then a second optional bivalent linking group, to the polymer chain, provided that the 3'-position is unsubsituted and the 4'-substituent does not have any --NH--, --OH or --SH substituents.

2-hydroxyphenyl benzotriazole based UV absorbing polymers with

2-(2'-Hydroxyphenyl)-2H-benzotriazoles of formula (I): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and Z are defined in the specification, are prepared by catalytic hydrogenation of a suitable o-nitroazo dye compound in the presence of a PtS, Pt, Pd, Pt/Pd or other noble metal hydrogenation catalyst, in the presence of a base, an acid and a hydroxylic solvent.

Process for the preparation of benzotriazole derivatives

A method for preparing a compound of formula (VII): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and X are defined in the specification; the method comprising:

Method of synthesizing 2-(2'-hydroxyphenyl) benzotriazole compounds

An ultraviolet absorbing polymer, and photographic elements containing such a polymer, which polymer includes units formed from monomers of the structure of formula (II): A photographic element containing an ultraviolet absorbing polymer which includes units formed from monomers of the structure of formula (I): ##STR1## wherein: p and q are, independently, 0 or 1;

2'-hydroxyphenyl benzotriazole based UV absorbing polymers and

Ultraviolet absorbing compounds of formula (I) and photographic elements containing such compounds: ##STR1## wherein: R.sub.4 is a bivalent linking group; the benzo or phenyl ring shown may be further substituted or unsubstituted;

Benzotriazole based UV absorbing compounds and photographic elements

An ultraviolet absorbing monomer of formula (A): ##STR1## wherein: R.sub.4 and R5 are, independently, a substituted or unsubstituted alkylene with or without intervening oxygen, sulfur or nitrogen atoms; R.sub.6 is H or a substituted or unsubstituted methyl; and the benzo ring, the hydroxy substituted phenyl ring and the phenyl ring of the styryl group may be further substituted or unsubstituted. A method of making such monomers and photographic elements containing UV absorbing polymers formed from such monomers are also provided.

Benzotriazole based uv absorbing monomers and photographic elements

An ultraviolet absorbing compound of formula (I) below, and photographic elements containing such a compound as an ultraviolet absorber: ##STR1## wherein: R.sub.4 is H or an alkyl group, and the benzo or phenyl ring shown may be further substituted or unsubstituted;

Benzotriazole based UV absorbers and photographic elements containing

An ultraviolet absorbing monomer of formula (A): ##STR1## wherein: R.sub.4 and R.sub.5 are, independently, a substituted or unsubstituted alkylene with or without intervening oxygen, sulfur or nitrogen atoms; R.sub.6 is H or a substituted or unsubstituted methyl; and the benzo ring, the hydroxy substituted phenyl ring and the phenyl ring of the styryl group may be further substituted or unsubstituted. A method of making such monomers and photographic elements containing UV absorbing polymers formed from such monomers are also provided.

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Rochester, NY, United States of America

Lal C Vishwakarma