The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1993
Filed:
Jun. 30, 1992
Fujio Kakimi, Kanagawa, JP;
Makoto Yamada, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A light-sensitive material comprises a support and a light-sensitive layer provided thereon which contains silver halide, a reducing agent, a polymerizable compound, a color image forming substance and a base precursor. The silver halide, the reducing agent, the polymerizable compound, the color image forming substance and the base pre cursor are contained in microcapsules which are dispersed in the light-sensitive layer. According to the present invention, the color image forming substance is a coloredsubstance, namely a dye or a pigment, and the microcapsules further contain a polar compound such as an alcohol, an ether, an amide, an urea, an urethane and a sulfonamide. Most of the polar compounds preferably have a molecular weight in the range of 100 to 400. An exceptional polar compound is polyethylene glycol or its derivative, which preferably has a molecular weight in the range of 200 to 20,000. The polar compound has a function of preventing the base precursor from decomposition, which is accelerated by the dye or pigment. The polar compound is preferably attached on the surface of the particles of the base precursor.