Minnesota Mining and Manufacturing Company

Samsung Electronics Co., Ltd.

3m Innovative Properties Company

David T Ask

Zbigniew Tokarski

Kam Wah Law

Thomas J Ludemann

Ronald J Moudry

Jiayi Zhu

Nusrallah Jubran

James A Baker

Kumars Sakizadeh

Gary E LaBelle

John T Blair

Valentas Gaidelis

Edmundas Montrimas

Jonas Sidaravicius

Kristy A Gillette

Eric D Shockey

Jeffrey W Hagen

Kristine A Fordahl

A coating composition includes a first polymer and a second polymer that are incompatible and non-reactive with one another. The absolute value of the difference between the refractive index of the first polymer and the refractive index of the second polymer is about 0 to about 0.01. The first polymer and the second polymer are soluble in a carrier liquid that is a good solvent for the first polymer and a poor solvent for the second polymer. The carrier liquid is removed from the coating layer to spinodally decompose the mixture of the first polymer and the second polymer in an amount sufficient to form a substantially continuous first phase with a predominant amount of the first polymer and a substantially discontinuous second phase with a predominant amount the second polymer. At least 70% of the second phase includes droplets with an aspect ratio, when viewed in the plane of the surface of the substrate, of less than about 3.

Textured coating for optical products

A matte coat having a first major surface, the matte coat comprising a first layer defining the first major face of the matte coat and comprising a polymeric matrix and a plurality of forming bodies entrained therein, wherein index of refraction of the forming bodies is similar to that of the polymeric matrix and the first major surface has a plurality of protuberances corresponding to forming bodies entrained within. Also, optical assemblies comprising such matte coats and methods for making such matte coats.

Low sparkle matte coats and methods of making

An electrophotographic article having a complex of charge generating material and at least one transfer material selected from the group consisting of electron transfer material and hole transfer material is formed by admixing the charge generating material, at least one transfer material, and an organic binder in a solvent to form a coatable dispersion comprising a complex of charge generating material and said at least one transfer material; and coating said coatable dispersion onto a conductive substrate to form a charge transfer layer on the electrophotoconductive article. A novel S-form titanyl oxyphthalocyanine is also preferred, the novel form displaying major peaks of Bragg's 2theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5&#xb1;0.2 degrees, 9.7&#xb1;0.2 degrees, 11.7&#xb1;0.2 degrees, 13.5&#xb1;0.2 degrees, (optionally at 21&#xb1;0.2 degrees and/or 23.5&#xb1;0.2 degrees,) 24.1&#xb1;0.2 degrees, 26.4&#xb1;0.2 degrees, and 27.3&#xb1;0.2 degrees group. Additional peaks, approaching or equivalent to major peaks, may also be present as 15.0, 15.3 and 16.0&#xb1;0.2 degrees.

Photoconductor materials based on complex of charge generating material

A photoreceptor with good mechanical and physical properties is provided with an overcoat layer comprising a copolymer of an &#x3b1;,&#x3b2;-ethylenically unsaturated carboxylic acid and an &#x3b1;,&#x3b2;-ethylenically unsaturated monomer wherein the weight percent of the &#x3b1;,&#x3b2;-ethylenically unsaturated carboxylic-acid is at least 25% up to 99% of the copolymer. The copolymer may comprise an &#x3b1;,&#x3b2;-ethylenically unsaturated carboxylic acid and an &#x3b1;,&#x3b2;-ethylenically unsaturated monomer wherein the copolymer has an acid value of at least 150 mg KOH/g the copolymer. The copolymer may be present in a blend with a second polymer or copolymer comprised of units derived from a second &#x3b1;,&#x3b2;-ethylenically unsaturated monomer that is different from the an &#x3b1;,&#x3b2;-ethylenically unsaturated carboxylic acid and/or the &#x3b1;,&#x3b2;-ethylenically unsaturated monomer. The copolymer or the copolymer blend may be present in a layer that is crosslinked or crosslinkable, the crosslinking being effected through a distinct crosslinking agent that reacts with group(s) on the an &#x3b1;,&#x3b2;-ethylenically unsaturated carboxylic acid or the &#x3b1;,&#x3b2;-ethylenically unsaturated monomer.

Electrophotographic photoreceptors with novel overcoats

A crystalline phase of titanyl oxyphthalocyanine, referred to herein as the S-phase, has an internal blend of lattice arrangements is provided by treatment of the gamma-form of titanyl oxyphthalocyanine. The S-phase is a truly new phase, and not a mixture of particles of various phases (e.g., combinations of the beta-phase and the gamma-phase), with internal lattice distributions of atoms and molecules forming a new, non-continuous, non-uniform lattice structure. The x-ray spectrum shows a blend of diffraction peaks, having peaks that have previously been distinctly present only collectively among various crystalline forms of titanyl oxyphthalocyanine, but can now be provided in a single crystalline form. The visible spectra show significant absorption differences. The novel S-form titanyl oxyphthalocyanine is also used in a photoconductor displaying major peaks of Bragg's 2 theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5&plusmn;0.2 degrees, 9.7&plusmn;0.2 degrees, 11.7&plusmn;0.2 degrees, 13.5&plusmn;0.2 degrees, (optionally at 21&plusmn;0.2 degrees and/or 23.5&plusmn;0.2 degrees,) 24.1&plusmn;0.2 degrees, 26.4&plusmn;0.2 degrees, and 27.3&plusmn;0.2 degrees group. Additional peaks, approaching or equivalent to major peaks, may also be present as 15.0, 15.3 and 16.0&plusmn;0.2 degrees.

Photoconductor materials based on new phase of titanyl phthalocyanine

Post-processing stabilizers for photothermographic, silver imaging media are disclosed. The stabilizers are represented by the following general formulae: ##STR1## wherein: R.sup.1, R.sup.2, and R.sup.3 are independently H, halogen, an alkyl group, an alkoxy group, a thioalkyl group, a cycloalkyl group, a perhalogenated alkyl group, or taken together form a cycloaliphatic group. Compounds of formula (I) may be used as stabilizer precursors in photothermographic silver imaging media to provide post-processing stability without significantly adversely affecting desired properties of the photothermographic material.

Post-processing stabilizers for photothermographic articles

The use of polymers and polymer blends having defined resistance changes during heating are particularly useful in resistively heated photothermographic elements.

Resistively heatable photothermographic element

The use of a reflective white substrate comprising a polymeric film containing both vesicles and white pigment provides a good background layer for photothermographic emulsions which improves image properties.

Growing community of inventors

Somerset, WI, United States of America

David T Ask