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Hot melt ink comprising a mixture of dyes

A technology of dyes and compositions, applied in inks, household utensils, applications, etc., can solve the problems of color imprinting and discoloration

Inactive Publication Date: 2008-01-23
OCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A disadvantage of known hot-melt inks is that the color imprint of printed full-color images using this ink becomes discolored, even if the receiving material on which the ink is deposited is kept in a dark place

Method used

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  • Hot melt ink comprising a mixture of dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1 is an ink composition of the present invention.

Embodiment 2

[0009] Example 2 is another ink composition of the present invention.

Embodiment 3

[0010] Example 3 is the preparation of the binder used in the carrier composition.

[0011] Example 1

[0012] The hot melt ink of the present invention is based on a carrier composition comprising 65% by weight of a diester formed from the reaction of 1,4-dimethanol-transcyclohexane with 2 molar equivalents of orthotoluic acid. This compound, known as Cyclo-2T, is known from EP1067157 (compound 17 in Table 2, D). The carrier composition also contained 35% by weight of an amorphous component, which is a mixture of different compounds. Example 3 describes how to obtain this amorphous component. The dyes added were 1.125 g CI Solvent Red 172 and 1.125 g CI Solvent Red 149 per 100 g of carrier composition. CI solvent red 172 was purchased from Messrs Buckeye under the trade name LambdaPlast RedL2B. The dyes are known as Morplus Magenta36 and Xindasol Red 172. CI Solvent Red 149 was purchased from MessrsBuckeye under the trade name LambdaPlast FL Red FGA. The dye is known by...

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Abstract

The invention relates to an ink composition which is solid at room temperatu re and liquid at a higher temperature, comprising a non-aqueous carrier composition and tw o compatible dyes, one of which is fluorescent and one non-fluorescent, wherei n the said dyes are of the same type. In one embodiment, the dyes in the ink are both o f the anthraquinone type.

Description

technical field [0001] The present invention relates to an ink composition, which is solid at room temperature and liquid at higher temperatures, comprising a non-aqueous carrier composition and two compatible dyes, one dye is a fluorescent dye and the other species are non-fluorescent. Background technique [0002] Ink compositions of this type (also called hot melt inks) are known from US Pat. No. 5,507,864. This patent describes hot melt inks containing compositions based on fatty acid amide compounds, especially tetraamide compounds, as carriers. In order to obtain an ink of sufficient color saturation, two different types of dyes, fluorescent dyes and non-fluorescent dyes, are used. From the Color Index (C.I.), it is a simple matter to determine whether the dyes are of different types. For example, an ink containing a combination of C.I. Solvent Red 172 (a non-fluorescent dye of the anthraquinone type) and C.I. Solvent Red 49 (a fluorescent rhodamine dye of the xanth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/00C09D11/02
CPCC09D11/34C09D11/328C09D11/02
Inventor M·P·L·胡恩克
Owner OCE TECH
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