Eastman-kodak Company

Donald H Wadsworth

George L Fletcher, Jr

Steven L Bender

Charles H Weidner

Harold T Thomas

Jean E Jones

Richard S Vinal

Oxoindolizine and oxoindolizinium dyes are novel compounds useful in imaging, such as laser recording and reading. These dyes are formed by (1) the reaction of a cyclopropenone and a pyridine compound, (2) by reaction of (a) color-forming couplers with (b) reaction products from the reaction of cyclopropenones with pyridine compounds, or (3) by condensation reactions of indolizinols, indolizinones, and indolizinium ions.

Oxoindolizine and oxoindolizinium compounds useful as dyes

There are disclosed dyes, compositions, imaging elements, and methods of forming images, wherein cyclopropenones are reacted with di- or tri-halogenated compounds in the presence of pyridine to form said dyes. In areas exposed to activating radiation, the cyclopropenone decomposes and prevents the dye reaction from occurring.

Indolizinone dyes and compositions, elements and methods using same

Oxoindolizine and oxoindolizinium dyes are useful as radiation absorptive materials in recording elements.

Recording and information record elements comprising oxoindolizine and

Oxoindolizine and oxoindolizinium dyes are useful in photographic materials and processes as image dyes. These dyes are formed in unexposed areas of photographic materials, especially photothermographic materials, by the reaction of a photosensitive cyclopropenone with a pyridine compound. Oxoindolizine and oxoindolizinium dyes are alternatively formed by (1) reaction of a photosensitive cyclopropenone with a pyridine compound and (2) reaction of the resulting product with a color forming coupler. The photographic material is imagewise exposed and then heated to a processing temperature to form a dye image. Alternatively, the oxoindolizine and oxoindolizinium dyes are produced by imbibing at least one of the reactants into the photographic material comprising a photosensitive cyclopropenone.

Photographic materials and processes comprising oxoindolizine and

A photographic vesicular imaging composition, element and process are provided using a binder having a suitable gas impermeability, a cyclopropenone vesiculating agent, and optionally a spectral sensitizing compound.

Cyclopropenone vesicular imaging composition, element and process

Process for preparing mono- and diaryl ethers of bis(hydroxymethyl) ether by reaction of the dialkyl esters of polyoxymethylene glycols with phenol or substituted phenol. In a preferred embodiment the reaction is carried out in the presence of a catalyst.

Growing community of inventors

Rochester, NY, United States of America

Donald H Wadsworth