Abstract: A thermal recording material having both of excellent coloring property and storage stability with a low cost is provided. The thermal recording material contains a leuco dye and a developer in a coloring layer, and the developer contains 2,4?-dihydroxydiphenylsulfone and 4,4?-dihydroxydiphenylsulfone with a specific ratio, and the above-mentioned two kinds of the dihydroxydiphenylsulfones are made a material obtained by sequentially undergoing a separating step for heightening the weight ratio of a 2,4? material from a dichlorodiphenylsulfone mixture containing the 2,4? material and a 4,4? material, a reaction step of hydrolyzing the mixture to obtain a dihydroxydiphenylsulfone mixture, and a post-treatment step of subjecting to decolorization and purification.

Abstract: A thermal recording material having both of excellent coloring property and storage stability with a low cost is provided. The thermal recording material contains a leuco dye and a developer in a coloring layer, and the developer contains 2,4?-dihydroxydiphenylsulfone and 4,4?-dihydroxydiphenylsulfone with a specific ratio, and the above-mentioned two kinds of the dihydroxydiphenylsulfones are made a material obtained by sequentially undergoing a separating step for heightening the weight ratio of a 2,4? material from a dichlorodiphenylsulfone mixture containing the 2,4? material and a 4,4? material, a reaction step of hydrolyzing the mixture to obtain a dihydroxydiphenylsulfone mixture, and a post-treatment step of subjecting to decolorization and purification.

Abstract: A cleaning agent or a rinsing agent having no flash point which comprises a chlorine-free fluorine-containing compound have a vapor pressure at 20° C. of 1.33×103 Pa or more and one or more components having a vapor pressure at 20° C. less than 1.33×103 Pa and optionally an additive such as an antioxidant; a method for cleaning which comprises cleaning with the cleaning agent and rinsing and/or vapor cleaning utilizing a vapor being generated by boiling the cleaning agent or a condensate thereof; a method for separating a soil which comprises contacting a cleaning agent in a cleaning tank with a condensate of the vapor of the cleaning agent in a soil separating tank, to thereby continuously separate and remove a soil contained in the cleaning agent; and a cleaning apparatus.

Abstract: A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula: 10?(A+B)?3 wherein each of A and B is an integer of 1 or more.

Abstract: A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula: 10?(A+B)?3 wherein each of A and B is an integer of 1 or more.

Abstract: A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula: 10?(A+B)?3 wherein each of A and B is an integer of 1 or more.

Abstract: A cleaning agent or a rinsing agent having no flash point which comprises a chlorine-free fluorine-containing compound have a vapor pressure at 20° C. of 1.33×103 Pa or more and one or more components having a vapor pressure at 20° C. less than 1.33×103 Pa and optionally an additive such as an antioxidant; a method for cleaning which comprises cleaning with the cleaning agent and rinsing and/or vapor cleaning utilizing a vapor being generated by boiling the cleaning agent or a condensate thereof; a method for separating a soil which comprises contacting a cleaning agent in a cleaning tank with a condensate of the vapor of the cleaning agent in a soil separating tank, to thereby continuously separate and remove a soil contained in the cleaning agent; and a cleaning apparatus.

Abstract: A cleaning agent or a rinsing agent having no flash point which comprises a chlorine-free fluorine-containing compound having a vapor pressure at 20° C. of 1.33×103 Pa or more and one or more components having a vapor pressure at 20° C. less than 1.33×103 Pa and optionally an additive such as an antioxidant; a method for cleaning which comprises cleaning with the cleaning agent and rinsing and/or vapor cleaning utilizing a vapor being generated by boiling the cleaning agent or a condensate thereof; a method for separating a soil which comprises contacting a cleaning agent in a cleaning tank with a condensate of the vapor of the cleaning agent in a soil separating tank, to thereby continuously separate and remove a soil contained in the cleaning agent; and a cleaning apparatus.

Abstract: A cleaning agent or a rinsing agent having no flash point which comprises a chlorine-free fluorine-containing compound having a vapor pressure at 20° C. of 1.33×103 Pa or more and one or more components having a vapor pressure at 20° C. less than 1.33×103 Pa and optionally an additive such as an antioxidant; a method for cleaning which comprises cleaning with the cleaning agent and rinsing and/or vapor cleaning utilizing a vapor being generated by boiling the cleaning agent or a condensate thereof; a method for separating a soil which comprises contacting a cleaning agent in a cleaning tank with a condensate of the vapor of the cleaning agent in a soil separating tank, to thereby continuously separate and remove a soil contained in the cleaning agent; and a cleaning apparatus.

Abstract: A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula:

Abstract: A recording material wherein a color forming system comprising (a) a fluorene compound as a dye precursor, (b) a color developer, (c) an isocyanate compound, and (d) in imido compound, gives a developed color image having an absorption at near infrared portion and excellent image storability.

Abstract: This invention relates to a thermal printing material comprising a substrate and a thermal printing layer formed thereon containing an aromaticity-possessing isocyanate compound, an imino compound having at least one>C.dbd.NH group which reacts with said aromaticity-possessing isocyanate compound on heating to produce color, and one or more aniline derivatives having at least one amino group, said thermal printing layer being intended to improve the image storage properties, in particular, the storage properties of color-undeveloped portion (ground), and it can be utilized in recorders for measurements, facsimiles, printers, terminals of computers, labels, and automatic ticket vending machines.

Abstract: A recording material wherein a color forming system comprising (a) a fluorene compound as a dye precursor, (b) a color developer, (c) an isocyanate compound, and (d) an imino compound, gives a developed color image having an absorption at near infrared portion and excellent image storability.

Abstract: Disclosed is a method for coloring an article to be colored, which comprises contacting and reacting, in the article to be colored, (a) at least one aromatically bonded isocyanate compound with (b) at least imino compound being capable of forming a color by the reaction with the isocyanate compound and having at least one>C.dbd.NH group to effect the color formation, and a color-forming material comprising the compounds (a) and (b), at least one of which is supported on an article to be colored. A color or colored image formed by the reaction between the compounds (a) and (b) is excellent in chemical and light resistance.