Polaroid Corporation

Other

Parag G Mehta

Eric S Kolb

Russell A Gaudiana

Richard A Minns

Richard T Ingwall

Lloyd D Taylor

Pradeep K Dhal

David A Waldman

Agota F Fehervari

John C Warner

William J Cumming

Howard G Schild

Michael Glenn Horner

Electroluminescent devices have, as the active layer, a polymer comprising a poly(3-substituted thiophene), the 3-substituent of which is an alkyl, cycloalkyl, alkoxy, cycloalkoxy, alkoxyalkyl, fluorocarbon, siloxyl or heteroorganic group, the poly(3-substituted thiophene) having a head-to-tail ratio of at least about 80 percent. Such devices give better electroluminescent performance than similar devices using a poly(3-substituted thiophene) having a lower head-to-tail ratio.

Electroluminescent devices and processes using polythiophenes

A holographic recording medium comprises an acid generator capable of producing an acid upon exposure to actinic radiation; a binder; and at least one monomer or oligomer capable of undergoing cationic polymerization initiated by the acid produced from the acid generator. This recording medium is not subject to the disadvantages (for example, oxygen sensitivity) associated with radical-polymerized prior art holographic recording media.

Holographic medium and process for use thereof

An electroluminescent device comprises first and second electrodes, a layer of an electroluminescent polymer disposed between the electrodes; and a hole injection layer disposed between the first electrode and the layer of electro-luminescent polymer. The hole injection layer is formed from a polymer having a main chain and a plurality of sidechains each attached at one of its ends to the main chain, at least some of the sidechains containing an electron-donating substituent such that the oxidation potential of the polymer is less positive than about +1.6 V, and is desirably in the range of about +0.4 to about +0.8 V. Preferred electron-donating groups are di- and triphenylamino groups.

Electroluminescent device with polymeric charge injection layer

An imaging process uses an imaging medium comprising a polymer having a plurality of first groups. This polymer is imagewise contacted with an imaging reagent comprising a plurality of second groups, thus causing, in the areas of the medium exposed to the imaging reagent, the second groups to react with the first groups and form a colored material, and thereby forming an image on the imaging medium. One of the first and second groups comprises a benzotriazinone or benzothiatriazine-4,4-dioxide benzotriazinone moiety and the other comprises a naphthol or a pyrazalone moiety.

Imaging medium and process

An electroluminescent polymer comprises a main chain and a plurality of side chains, each of the side chains comprising an electroluminescent group and a flexible spacer connecting the electroluminescent group to the main chain, the spacers and the main chain being such that the electroluminescent groups are not conjugated with one another. The nature of the main chain and the spacer groups can be varied to enhance solubility, film-forming ability and other characteristics of the polymer, without significantly changing the electroluminescent properties of the polymer.

Electroluminescent polymers, processes for their use, and

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Peabody, MA, United States of America

Parag G Mehta