Minnesota Mining and Manufacturing Company

Robert D Lowrey

Mao-Jin J Chern

Sanford Cobb, Jr

George Van Dyke Tiers

Russell R Isbrandt

Arthur A Wegwerth

Donna M Koeck

Howard D Nelson

Synergistic combinations for use in stabilizing thermographic imaging systems comprise (1) one or more aromatic compounds which form quinones, diimines, or quinonimines upon oxidation in combinaton with (2) 1-phenyl-3-pyrazolidinone, or derivatives or 1-phenyl-3-pyrazolidinone. When used in a thermographic imaging system comprising a nitrate salt, and a leuco dye in a binder these stabilizing combinations prevent oxidation and premature reaction of the leuco dye.

Stabilizer combination for dye oxidation

A composition comprising a photopolymerizable epoxy-containing material which is useful to provide a hermetically sealed liquid crystal display cell. The photocured seal is chemically resistant to the contents of the liquid crystal cell. Adhesion of the photopolymerizable epoxy material to the glass plates of the liquid crystal cell is improved by addition of glycidoxypropyl triethoxy silane or its precondensate.

Liquid crystal display and photopolymerizable sealant therefor

A thermographic imaging system comprising a single layer and capable of providing a stable dark to black image upon localized heating is disclosed. The single layer comprises a polymeric binder, a combination of at least two leuco dyes, and a nitrate salt.

Black image from a thermographic imaging system

A method of making a liquid crystal display cell wherein the planar glass plates of the cell are bonded together with a photopolymerizable epoxy-containing material to form a hermetically sealed cell and wherein the photocured seal is chemically resistant to the contents of the liquid crystals cell. Adhesion of the photopolymerizable epoxy material to the glass plates of the liquid crystal cell is improved by addition of glycidoxypropyl triethoxy silane or its precondensate.

A skivable billet having improved uniform heat absorptive ability in which layers of enhanced optical density comprise water soluble polyazo direct dyes such as Formanil Black G and finely divided silica.

Growing community of inventors

Aitkin, MN, United States of America

Robert D Lowrey