JPS60253595A - Sublimable transfer body - Google Patents

Abstract

PURPOSE:To enable the sublimation transfer of a magenta color having good sublimability, by using one or more of coloring matter having a specific structural formula. CONSTITUTION:In a sublimable transfer body according to a sublimable transfer recording system, one or more of coloring matter represented by formula wherein X is a chlorine atom or a bromine atom. The sublimable transfer body is prepared by applying the ink containing said coloring matter to a transfer substrate. The ink containing the coloring matter is usually constituted of sublimable coloring matter, a binder and a compound having absorption in the oscillation wavelength of laser when laser is used as a heat source and prepared by dissolving said components in a solvent or finely pulverizing the same in the 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 uses heat to sublimate dye to form an image, and is currently attracting attention as a method for obtaining color hard copies from televisions, CRT color displays, color facsimiles, magnetic cameras, etc. .

As the heat source, a heating element such as a thermal head or a laser, especially a semiconductor laser, is used.The amount of dye sublimed can be controlled by the heat energy it generates, making it possible to record gradations. be.

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, which shortens the life of the heat source and reduces the practicality of the recording device. The problem was that it would disappear. 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.

An object of the present invention is to provide a magenta sublimation transfer material having good sublimation properties.

That is, the present invention provides a sublimation transfer material using the 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, and is provided by the following general formula +Il (wherein, X is chloride). This invention relates to a sublimation transfer material characterized in that it uses one or more kinds of dyes represented by (representing an atom or a bromine atom).

The dye represented by the general formula (Il) can be prepared by a known method, for example,
It is synthesized using the reaction formula below.

OH (In the formula, X represents the above meaning.) A sublimation transfer material is manufactured by applying a pigment ink onto a transfer substrate. Generally, the transfer substrate is capacitor paper,
Cellophane, polyimide resin, polyester resin, polyether sulfone resin, or a ribbon or film obtained by treating these resins to improve heat resistance and/or smoothness are 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

As a binder, natural resins such as dammar, gum arabic, tragantham, dextrin or casein or their modified resins, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxy cellulose, cellulose resins such as nitrocellulose, polyvinyl alcohol Alternatively, one type or a mixture of two or more types of vinyl resins such as polyvinyl acetate may be 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 chlorine-based solvents such as hydrogen, dichloroethane, trichlorethylene, and perchlorethylene, and acetate esters such as ethyl acetate, butyl acetate, and ethoxyethyl acetate are used.

Carbon black, phthalocyanine dyes, dithiol rings, naphthoquinones, etc. 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 6 parts of ethylcellulose, l-amino-2-bromo-4-
After thoroughly kneading an ink composition containing 5 parts of hydroxyanthraquinone, 71.2 parts of xylene, and 17.8 parts of n-butanol using a paint conditioner, it was applied to a 10 μm thick condenser paper using a bar coater. A sublimation transfer material was obtained by drying. When this transfer body was placed opposite paper coated with polyethylene terephthalate resin and heated with a heating element, a clear magenta image with high density was obtained on the paper.

The dye used in this example was synthesized as follows.

200 parts of l-aminoanthraquinone in 160 parts of 96% sulfuric acid
part by volume and 180 parts by volume of 20% fuming sulfuric acid, heated to 40°C, dissolved, cooled to 25°C, and then discharged to 200 parts of 7 kg.

At 25° C., 159 parts of bromine are added, followed by 65 parts of chlorine over 7 hours. Thereafter, the temperature was raised to 50°C over 8 hours using steam, and the temperature was kept at the same temperature for 2 hours. Thereafter, the temperature was raised to 80°C over 2 hours and kept at the same temperature for 1 hour. After adding 10 parts of sodium sulfite solution to eliminate excess bromine, the mixture was filtered, washed with water, and dried to obtain 882 parts of l-amino-2,4-dibromoanthraquinone.

Next, 85 parts of boric acid was added to 2500 parts of 8-5% oleum.
The l-amino-2,4-
Add 250 parts of dibromoanthraquinone and gradually reduce to 100 parts
Raise the temperature to ℃ and keep at the same temperature for 1 hour. After that, 120
Raise the temperature to ℃ and keep at the same temperature for 6 hours. After the generation of bromine or hydrogen bromide is completed, it is cooled to 60°C and water 17
After adding 50 parts, the mixture was filtered, washed with water, and dried to obtain 189 parts of 1-amino-2-bromo-4-hydroxyanthraquinone.

mp 288-b Sublimation start temperature 156°C Example 2 6 parts of ethyl cellulose, l-amino-2-chloro-4-
After thoroughly kneading an ink composition containing 6 parts of hydroxyanthraquinone, 71.2 parts of xylene, and 17.8 parts of n-butanol using a paint conditioner, it was applied to a 10 μm thick condenser paper using a percoater and dried. A sublimation transfer material was obtained. When this transfer body was placed opposite paper coated with polyethylene terephthalate resin and heated with a heating element, a clear magenta image with high density was obtained on the paper.

The dye used in this example was synthesized as follows.

228 parts of l-aminoanthraquinone are dissolved in 948 parts of dimethylformamide and cooled to 0-5°C. At the same temperature, 149 parts of chlorine are introduced over a period of 4 hours. Next, the temperature is raised to 60 to 65°C over 1 hour or more, and kept at the same temperature for 1 hour. Thereafter, it was cooled to room temperature, filtered, washed with water, dried, and 1-amino-2,4-dichloroanthraquinone 262
part was obtained.

Next, 88 parts of boric acid was added to 2500 parts of 3-5% total 5% acid.
The l-amino-2,4-
Add 192 parts of dichloroanthraquinone and gradually reduce to 100 parts.
Raise the temperature to ℃ and keep at the same temperature for 1 hour. After that, 120
Raise the temperature to ℃ and keep at the same temperature for 5 hours. After the generation of chlorine or hydrogen chloride has finished, cool it to 60°C and add water 17
After adding 50 parts, the mixture was filtered, washed with water, and dried to obtain 145 parts of l-amino-2-chloro-4-hydroxyanthraquinone.

Example 8 An ink composition of 6 parts of ethylcellulose, 2 parts of l-amino-2-promoanthraquinone, 2 parts of l-amino-2-chloroanthraquinone, 70 parts of toluene and 20 parts of Impropatol was mixed into a paint conditioner. After thorough kneading, it was coated on a polyethylene terephthalate film with a thickness of 1 Oum using a bar coater, and dried to obtain a sublimation transfer body.This transfer body was placed opposite a paper coated with polyethylene terephthalate resin, and was coated with a heating element. When heated, a dense, clear magenta image was obtained on the paper.

Claims (1)

[Scope of Claims] A sublimation transfer body of a sublimation transfer recording system in which a dye is sublimated by heat from an ink layer provided on a substrate to form an image on printing paper, is a sublimation transfer body having the following general formula (I) 0H (wherein, X represents a chlorine atom or a bromine atom.) A sublimation transfer material characterized by using one or more kinds of dyes represented by