JPS61262190A - Sublimable transfer body - Google Patents

Abstract

PURPOSE:To provide not only good sublimability but also excellent properties even in light fastness, by using a specific dye in the ink layer of a sublimable transfer body using a magenta dye excellent in sublimability. CONSTITUTION:As the dye in a sublimation transfer recording type sublimable transfer body wherein the dye is sublimed from the ink layer provided on a substrate by heat and an image is formed on print paper, the dye represented by formula VI is used. The dye represented by the formula VI can be synthesized, for example, according to reaction formula. The sublimable transfer body is prepared by applying dye ink. The dye ink is generally constituted of the sublimable dye and a binder or both components and a compound having absorption in the oscillation wavelength of laser when laser is used as a heat source and prepared by dissolving or finely pulverizing said components in a solvent by using a ball mill or a paint conditioner.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sublimation transfer material characterized by using a magenta dye having excellent sublimation properties.

The sublimation transfer image recording method is a method in which an image is formed by sublimating dye using heat, and is currently used in televisions, CRTs, etc.
It is attracting attention as a method of obtaining color hard copies from color displays, color facsimiles, magnetic cameras, etc. As the heat source, a heating element such as a thermal head or a laser, particularly a semiconductor laser, is used, and the amount of dye sublimed can be controlled by the heat energy provided, so that gradation recording can be obtained.

Currently, magenta dyes for sublimation transfer are selected from dyes that are mainly used as disperse dyes and are close to magenta, but all of them either have insufficient sublimation properties or the hue is not true. It has the disadvantage that it is not magenta in color. In particular, the low sublimability means that it is necessary to increase the output of the heating element or laser used as a heat source to sublimate these dyes, and as a result,
This has caused a problem in that the life of the heat source is shortened, making the recording device impractical. For this reason, there is a strong desire to develop a dye that has good sublimation properties and has hues of the three primary colors, cyan, magenta, and yellow, through subtractive mixing.

As a result of intensive studies, the present inventors found that it has good sublimability,
We have completed the present invention, which is a sublimation transfer material using a magenta dye that has excellent performance in terms of fastness such as light resistance.

That is, the present invention uses a dye represented by the following formula (I) in a sublimation transfer material using a sublimation transfer recording method in which a dye is sublimated by heat from an ink layer provided on a substrate to form an image on printing paper. This is a sublimation transfer material characterized by the following.

The dye represented by formula (I) can be synthesized by a known method, for example, according to the reaction formula below.

The U 0 sublimation transfer body is manufactured by coating a dye ink onto a transfer substrate. Transfer substrates are generally capacitor paper, cellophane, polyimide resin, polyester resin, polyethersulfone resin, or these resins with improved heat resistance and/or
Alternatively, a ribbon-like or film-like material that has been treated to improve smoothness is used.

Dye ink generally consists of a sublimable dye, a binder, and, if a laser is used as a heat source, a compound that absorbs at the laser's oscillation wavelength, and is dissolved or atomized in a solvent using a ball mill or paint conditioner. Manufactured by

Binders include natural resins or modified resins such as dammar, gum arabic, gum tragacanth, dextrin or casein, cellulosic resins such as methylcellulose, ethylcellulose, hydroxyethylcellulose, x-y-hydroxycellulose or nitrocellulose, polyvinyl alcohol or One type or a mixture of two or more types of vinyl resins such as polyvinyl acetate are used.

Solvents for dissolving or dispersing dyes and binders include water, alcohols such as ethanol, propatool, and butanol, ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone, and aromatic carbons such as toluene, xylene, and monochlorobenzene. One or a mixture of two or more of hydrogens, chlorine solvents such as dichloroethane, trichlorethylene, and perchlorethylene, and acetate esters such as ethyl acetate, butyl acetate, and ethoxyethyl acetate are used.

Carbon black, phthalocyanine dyes, dithiol complexes, naphthoquinones, and the like are used as compounds that absorb at the laser oscillation wavelength.

The dye ink obtained in this way can be used with a bar coater,
A sublimation transfer material is manufactured by applying the dye onto a transfer substrate using a roll coater, knife coater, screen printing, gravure printing, or the like.

Printing paper can be paper coated with polyester resin or polyamide resin, synthetic paper such as polypropylene, polyvinyl chloride, or polyester, or synthetic paper that has been treated to improve heat resistance, etc., as necessary. Those coated with polyester resin, polyamide resin, etc., which have a strong affinity with dyes, are used.

Hereinafter, the present invention will be described in detail with reference to Examples. In the examples, parts represent parts by weight.

Example 1 After thoroughly kneading an ink composition containing 6 parts of ethyl cellulose, 5 parts of l-amino-4-hydroxyanthraquinone, 71.2 parts of xylene, and 17.8 parts of n-butanol using a paint conditioner, a bar coater was used to coat the ink composition. It was coated on a 10 IIm capacitor paper and dried to obtain a sublimation transfer material. When this transfer body was placed opposite paper coated with polyethylene terephthalate resin and heated with a heating element, a clear magenta color image with high density was obtained on the paper.

Further, when the obtained image was subjected to a light resistance test (carbon arc lamp), there was almost no discoloration after 40 hours of irradiation.

The dye used in this example was synthesized as follows.

350 parts of 1-aminoanthraquinone to 5 parts of nitrobenzene
50 parts of the solution, and 180 parts of benzoyl chloride was added thereto at 125° C. over a period of 1.5 hours. After stirring at the same temperature for 1 hour, the mixture was cooled, 20 parts of 96% sulfuric acid was added at 30°C, and then 1000 parts of sulfuryl chloride was added over 1 hour.

The temperature was raised to 60°C in 3 hours, and the mixture was stirred at the same temperature for 20 hours.

The mixture was filtered at 20°C, washed with nitrobenzene and then with water, and then dried to obtain 410 parts of 1-benzoylamino-4-chloroanthraquinone.

Next, 52 parts of boric acid was added to 910 parts of 20% fuming sulfuric acid and 400 parts of 96% sulfuric acid, and dissolved at 100°C.
Cool to 0°C, add 1-benzoylamino-4-
225 parts of chloranthraquinone was added. 14 in 1 hour
The temperature was raised to 0℃, stirred at the same temperature for 4 hours, and then heated to 80℃.
900 parts of water was added, and the mixture was filtered at 20°C. 78
% sulfuric acid and then with water, and then dried to obtain 138 parts of ■-amino-4-hydroxyanthraquinone.

Claims (1)

[Claims] In a sublimation transfer body of a sublimation transfer recording method in which a dye is sublimated by heat from an ink layer provided on a substrate to form an image on printing paper, the following formula (I)▲mathematical formula, chemical formula, table ▼A sublimation transfer material characterized by using the dye shown in (I).