JPS6112394A - Thermal transfer coloring material - Google Patents

Abstract

PURPOSE:To obtain a yellowish-hue thermal transfer coloring material excellent in various kinds of fastness such as light fastness, having an excellent color value, favorable in thermal stability required at the time of transferring and having favorable transferring speed, by using a coloring material of a specified formula. CONSTITUTION:A coloring material of general formula( I ), wherein each of R<1> and R<2> is independently a lower alkyl or a lower alkoxyalkyl, is used. In a method of using the coloring material for thermal transfer type recording, the coloring material is finely dispersed or dissolved in a liquid, the resultant liquid is applied to a thin base to produce a color sheet, and by using the sheet, images can be transfer recorded on a printing paper by a thermal head.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a compound of the general formula (I) [wherein R and R each independently represent a lower alkyl group or a lower alkoxyalkyl group]. ]Relating to a yellow coloring material for thermal transfer.

The thermal transfer coloring material according to the present invention can be applied to a transfer printing method for synthetic fibers [Reference K, written by VENKATARAMAN].
The Chemistry of 5ynthetic
[References 6 Nikkei Electronics Spa, February 13, 1984 issue, Journal of the Institute of Image Electronics Engineers, Vol. 12, No. 1, p. 18] , 6 Journal of the Television Society”
Vol. 37, No. 7, p. 527] is a yellow coloring material useful as a coloring material, and its characteristics include good fastness to light and various other fastnesses, and a clear image upon transfer.

Gou J
, Pyrazole dyes represented by formulas (3) and (4) [References: JP-A-51-139869, JP-A-53-107
78, etc.], pyridone dyes [Reference, Japanese Patent Application Laid-open No. 1983-1973, etc. are known.

It has also been suggested that Color Index Disperse Yellow 54 (Formula (6)) or the like can be used as a coloring material for information recording.

When yellow coloring materials are used for synthetic fibers or recording materials using a thermal transfer method, the important qualities are various fastnesses including light fastness and color value. The material did not have sufficient fastness and color value. Also, the color tone was not clear.

Means for Solving the Problems In order to solve the above problems, the inventors of the present invention have conducted intensive studies and found that
It has been found that the coloring material represented by the general formula (I) has excellent color fastness including light fastness, and has a variety of color values. Further, the coloring material of the present invention has good heat resistance stability and transfer speed required during transfer.

A method for transfer printing synthetic fiber materials using this colorant is described, for example, in French Patent No. 1'223330 and German Patent Application No. 1769757, and dyes, preparations and auxiliary carriers for this purpose are It is known from the specifications of Patent Application Publication No. 1771813 and Patent Application Publication No. 177181.2, and the coloring material of formula (I) according to the present invention can also be used by a known method.

Further, as a method of using the coloring material of the present invention in thermal transfer type recording for information recording, the above-mentioned Nikkei Electronics 1984
Using the method described in the February 13, 2008 issue, for example, a color sheet in which a colorant is finely dispersed or dissolved and coated on a thin base agent can be used to transfer the colorant onto printing paper using a thermal head to form an image.

Examples will be shown below, in which "part" and "chi" mean weight.

[Example-1] Printing on paper by flexographic printing method using a coloring material of the following formula consisting of 10 parts of a coloring material, 5 parts of ethyl cellulose, 70 parts of ethyl alcohol, 20 parts of ethyl acetate, and 5 parts of ethyl glycol. Dry. When this paper print was placed on a polyester knitted fabric and passed together through a calendar at 200° C. for 30 seconds, the coloring material was transferred onto the knitted fabric, resulting in a yellow print on a white background.

[Example-2] 5 parts of coloring material, 20 parts of styrene polymer, and 8 parts of toluene
A colorant consisting of 0 parts is used to print on paper using the copper gravure printing process and the print is dried. The paper print pattern was then transferred onto the polyacrylonitrile fabric at 190° C. for 25 seconds in the same manner as in Example 1, resulting in a yellow print on a white background.

[Example-3] 20 parts of dye, 380 parts of water, 400 parts of 10% locust bean powder ether thickener, and 20 parts of 10% starch ether thickener
A colorant consisting of 0 parts is used to print on paper by rotary film printing and the print is dried. Next, Example-1
The paper print pattern was transferred onto a polyester fabric at 210° C. for 30 seconds in a manner similar to the method described in 2007, yielding a yellow print on a white background.

[Example-4] 10 parts of the coloring material of the following formula, and the composition was 40 parts of phenol-modified colophoeum resin, 20 parts of vegetable drying oil, 10 parts of long-oil alkyd resin, 25 parts of mineral oil, and 10 parts of Aerosil.
The desired pattern is printed on transfer paper by offset printing using a coloring material consisting of 90 parts of varnish and 2 parts of cobalt desiccant.

The printed side of the dried print was placed on a polyacrylonitrile fabric and processed on a sheet-fed press for 25 seconds at 205°C to give a yellow-on-white print with light and wet fastness.

[Example-5] Using 10 parts of the coloring material and 90 parts of a varnish whose composition is 10 parts of ethyl cellulose, 75 parts of ethyl alcohol, 20 parts of ethyl acetate, and 5 parts of ethyl glycol,
Print on paper using the intaglio printing method. Place the printed side of the dried print on the polyester fabric and place them together for 20 minutes.
Calendar for 30 seconds at 0°C. At this time, the coloring material migrated onto the polyester fabric, resulting in a yellow print on a white background that was fast to light and fast to washing.

[Example-6] Using a colorant consisting of 20 parts of the colorant, 280 parts of water, and 700 parts of 8% locust bean powder ether thickener, print on paper by rotary film printing method, and dry the print. . The paper print pattern was then transferred onto a polyester fabric in a manner analogous to the method of Example 2 at 210° C. for 20 seconds, resulting in a yellow-on-white print with wet fastness.

[Example 7] A ribbon was prepared by printing on paper using the coloring material prepared in Example 1 and drying it. Paper coated with polyester
By passing a ribbon between the heating element and the heating element, pressing the heating element onto the ribbon and transferring the coloring material to the coating paper, clear characters and images were reproduced on the coating paper.

Claims (1)

[Claims] (1) General formula (I) ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) [In the formula, R and R are each independently a lower alkyl group or
Represents a lower alkoxyalkyl group. ] Color material for thermal transfer.