JPS6112393A - Yellowish-hue 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 high 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 compounds of the general formula (I) [wherein W and t are each independently a lower alkyl group or
Represents a lower alkoxyalkyl group. ]Relating to a yellow coloring material for thermal transfer.

The coloring material for thermal transfer according to the present invention is described in the transfer printing method for synthetic fibers [References K, V, T, and 6 The Chem.
istry of 5ynthetic Dyes"■
Volume 191] or transfer type thermal recording method which is a means of recording information [Reference “Nikkei Electronics” 19
February 13, 1984 issue, 'Image Electronics Society Journal' Volume 12, No. 1
No. 18, 6 Journal of the Television Society, Vol. 37, No. 7, 52
It is a yellow coloring material useful as a coloring material used in [Page 7], and its characteristics include good fastness to light and various other fastnesses, and a clear image upon transfer.

Conventional technology Conventionally, as a dye for yellow transfer printing, a styryl dye represented by formula (2) [Reference: Japanese Patent Publication No. 54-5029
), pyrazole dyes represented by formulas (3) and (4) [References: JP-A-51-139869, JP-A-53-10
778, etc.], pyridone dyes represented by formula (5) [reference document JP-A-54-237S2], and the like 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 paper using a thermal transfer method, the important qualities are color fastness, including light fastness, and color value. Not enough fastness was obtained, and the color value was not long enough.

Also, the color tone was not clear.

Means to Solve 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 CI) has excellent color fastness including light fastness, and has a variety of color values. Furthermore, the coloring material of the present invention has good heat resistance stability and transfer speed required during transfer.

The method for transfer printing synthetic fiber materials using this coloring material is as follows:
For example, according to French Patent No. 1223330 and German Patent Application No. 1769757,
The dyes, preparations and auxiliary carriers for this purpose are known in the specifications of German Patent Application No. 1771813 and German Patent Application No. 1771812, and the coloring material 2) according to the present invention can also be used by known methods. I can do it.

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, 2013 issue, for example, a color sheet in which a coloring material is finely dispersed or dissolved and coated on a thin base agent can be used to transfer the coloring material to a printing paper using a thermal head to form an image.

Examples will be shown below, and parts and parts in the examples 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. Place the printed side of this paper on a polyester knitted fabric and heat them together for 30 minutes at 200°C.
After passing through a calendar for seconds, the coloring material transfers onto the knitted fabric,
A yellow print on a white background was obtained.

[Example-2] 5 parts of coloring material, 20 parts of styrene polymer, and 8 parts of dolol
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 coloring material, 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 colophonium resin, 20 parts of vegetable drying oil, 10 parts of long-oil alkyd resin, 25 parts of mineral oil, and 10 parts of Aerosil.
A desired pattern is printed on transfer paper by an offset printing method using a coloring material consisting of 90 parts of varnish and 1 part of Kobal-based drying agent to 2 parts of drying agent.

The printed side of the dried print was placed on a polyacrylonitrile fabric and processed at 205° C. for 25 seconds on a sheet-fed sheet to give a yellow-on-white pudding 1- with light and wet fastness properties. .

[Example-5] Using a coloring material consisting of 10 parts of shin2shiuub6fu3 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] Printing was carried out on paper by a rotary film printing method using a coloring material consisting of 20 parts of a coloring material of the following formula, 280 parts of water, and 700 parts of an 8% locust bean powder ether thickener. dry. The paper print pattern was then transferred onto a polyester fabric at 210 DEG C. for 20 seconds as in Example 2, resulting in a yellow-on-white print with wet fastness.

[Example 7] Paper was printed using the coloring material prepared in Example 1, dried, and a ribbon was prepared. By passing a ribbon between the polyester-coached paper and the heating element, pressing the heating element onto the ribbon and transferring the coloring material to the coating paper, clear letters and artists 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 each independently represent a lower alkyl group or a lower alkoxyalkyl group. ] A yellow coloring material for thermal transfer.