Triethanolamine salt negreinculate as dye black for thermal jet ink, and a thermal jet ink


C09B17/02 - of the benzene series

 

(57) Abstract:

Usage: for writing devices for various purposes. The inventive use triethanolamine salt negreinculate General formula Ar-SO-3N+(CH2CH2OH)3where Ar is the residue of nigrosine, as dye black for thermal jet ink. Thermal jet ink contains 20% aqueous solution triethanolamine salt negreinculate (25-35 wt. % ), diethylene glycol (25-55 wt.%) and the rest distilled water. Advanced thermal jet ink may contain 10-20 wt.% N-methylpyrrolidone. 2 S. and 1 C.p. f-crystals, 1 table.

The invention relates to the synthesis and application of organic dyes, in particular diatomovyh dyes, suitable for receiving ink compositions for writing devices for different purposes and structures thermal jet ink on the basis of them.

It is known that for these purposes up to the present time applied the dye nigrosine water soluble, which is the sodium salt of negreinculate solubility 90-100 g/l [1] the Dye is obtained by heating aniline, nitrobenzene hydrochloride and with ferric chloride at 170-180aboutWith posleduuschei sodium hydroxide at 70aboutC.

Also known nigrosine water soluble vysokolegirovannye in the form of sodium salt with a solubility of 160 g/l [2]

However, the production of ink for modern high-speed writing devices sodium salt of negreinculate does not ensure the stability of the solutions, the intensity of letters and adhesion to non-absorbent surfaces while maintaining other physical-chemical characteristics.

The aim of the invention is the finding of new dyes, black, high solubility, providing a high intensity letters, the ink adhesion on non-absorbent surfaces while maintaining other physical-chemical properties and range of applications, and the creation of new thermal jet ink, providing increased resource thermal jet printhead.

This goal is achieved by the synthesis of new triethanolamine salt negreinculate General formula Ar-SO3-N+(CH2CH2OH)3where Ar is the residue of nigrosine.

Triethanolamine salt negreinculate obtained as follows. Nigrosine sulferous in excess monohydrate concentration 100-101% in the ratio of 1:2,65 when temperature isaboutC.

P R I m m e R. Triethanolamine salt negreinculate.

34,0 g of nigrosine added to 90.0 g of monohydrate concentration 100-101% at a temperature of 90-95aboutC for 1 h, the Reaction mass is stirred for 1 h at 110-120aboutC and poured into 360 cm3water. The precipitate is washed with water until the pH of wash water at least 1.5. Next, prepare 15-18% suspension negreinculate in water, heated to 70-80aboutWith and add 14,55 g of triethanolamine in a period of 1.0 h, stirred for further 0.5 hours Receive a 20% aqueous solution of the dye, which is used to prepare an ink composition. The resulting dye solution is dried in a vacuum oven at 70-80aboutC. Get up 55.1 g of a black dye, the output 97,2% of the Dye has a solubility in water of 210 g/DM3so pl. 350aboutC. Found, 50,12; 50,00; N 8,81; 8,70; H 3,37; 3,40. IR-spectrum (KCl): 3380-3400 cm-1.

Known thermal jet ink containing a water-soluble nigrosine, ethylene or diethylene glycol and distilled water [3] Inks have high operational properties. However, the use of these ink does not provide a sufficiently high resource thermal jet printhead and a fairly high intenisty resource thermal jet print head and the color intensity.

This objective is achieved in that thermal jet ink comprising a water-soluble dye, diethylene glycol and distilled water, as a water-soluble dye containing 20% aqueous solution triethanolamine salt negreinculate in the following ratio, wt.

20% aqueous solution triethanolamine salt negreinculate 25-35 Diethylene glycol 25-55 distilled Water the Rest

To improve the stability of the ink during storage, they may additionally contain N-organic in the amount of 10-20 wt.

Ink for thermal jet printing was prepared as follows.

The estimated amount of the 20% aqueous solution triethanolamine salt negreinculate dissolved in diethylene glycol or a mixture of diethylene glycol and N-methylpyrrolidone and adjusted with distilled water to 100 g of the Mixture is heated at 60-80aboutC for 30 min, defend during the day and filtered. Get ink compositions containing different amounts of ingredients.

The table shows the proportion of ingredients and technological properties of the ink, depending on the composition.

1. Triacana/SUB>,

where Ar is the residue of nigrosine,

as dye black for thermal jet ink.

2. Thermal jet ink comprising a water-soluble dye, diethylene glycol and distilled water, characterized in that, to improve resource thermal jet printhead and color intensity, as a water-soluble dye they contain 20% aqueous solution triethanolamine salt negreinculate in the following ratio, wt.

20% Aqueous solution triethanolamine salt negreinculate 25 35

Diethylene glycol 25 55

Distilled water the Rest

3. Ink on p. 2, characterized in that, to increase the stability of the ink during storage, they additionally contain N-organic in the amount of 10 to 20 wt.

 

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