Minnesota Mining and Manufacturing Company

George H Crawford, Jr

Sharon M Rozzi

Kenneth L Hanzalik

David J Scanlan

Edward J Downing

Roy G Schlemmer

Richard S Fisch

Nicholas Kowanko

A photographic emulsion containing: a photosensitive silver halide; a light-insensitive, reducible silver source; a reducing agent for the light-insensitive, reducible silver source; and a binder consisting essentially of poly(vinyl butyral) having a poly(vinyl alcohol) content of about 17.5 to 21.0 wt. % and at least one solvent selected from the group consisting of: toluene, methyl ethyl ketone, acetone, tetrahydrofuran, and 1,4-dioxane. Additionally, a process for coating a substrate involving applying at least one layer of a molten thermoreversible organogel layer; causing it to gel; and removing residual solvent.

Thermoreversible organogels for photothermographic elements

Process for the simultaneous application of at least two molten, thermoreversible organogel layers to a substrate. The organogel layers can optionally contain dispersed additive ingredients, such as pigments. The organogel layers are coated onto a suitable substrate and then rapidly cooled or chilled to form a gel. Residual solvent is then removed. Multilayer coated films are thus formed with minimal interlayer mixing or interlayer diffusion of the additive ingredients.

Process for simultaneously coating multiple layers of thermoreversible

Most processes for the generation of metal oxide or metal sulfide films involved oxidation of existing metal layers or direct vapor deposition of the oxide or sulfide layer. These processes do not provide efficient control of film integrity, optical properties, and bonding. The use of a metal vapor deposition process in which a controlled amount of oxygen or sulfur containing gas or vapor is introduced into the metal vapor stream or portions enables formation of metal oxide or metal sulfide films with excellent control over the film properties.

Metal/metal oxide coating

Imaging materials are disclosed which comprise a substrate having a metal/ (metal oxide or sulfide) coating with an optical density of at least 0.2 on one surface of the substrate and a photoresist layer over said coating.

Imageable film containing a metal oxide opacifying layer

Metal/metal oxide coatings

A process for the production of polyhalocarbon oxides not requiring the use of light is disclosed. This process involves introducing into a reaction zone perhaloolefin and ozone. The polymers obtained are substantially free of oxidizing linkages. The polyhalocarbon oxides and hydrolyzed products obtained therefrom are useful as intermediates for stabilized materials useful, for instance, as heat transfer media and lubricants, and for cured materials useful, for instance, in sealant systems and adhesive systems.

Growing community of inventors

White Bear Lake, MN, United States of America

George H Crawford, Jr