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Dye type gel ink and preparation thereof

A neutral ink and dye technology, applied in orange, blue black, green five dye-based inks, yellow, red fields, can solve the problems of poor light fastness and water fastness, improvement of ink water resistance, not obvious, etc., to achieve good The effect of light fastness

Inactive Publication Date: 2008-11-12
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dye-based ink can be dissolved in water, the production process is simple, and the water is smooth; however, the light resistance and water resistance of the written handwriting are poor. To improve its performance, a certain amount of thickener and water-resistant agent should be added to the formula. , making the ink system unstable, uneven writing, and even clogging the nib
[0003] Chinese Patent Publication No. CN 1583899A discloses a high-viscosity water-based black ink, in which a polysaccharide condensed by glucose, formaldehyde, acetic acid and water is added to the water-based black ink composition to improve the viscosity and stability of the ink; But this polysaccharide is only a thickener, and there is no direct condensation reaction with the dye
Therefore, the improvement of the water resistance of the ink is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The specific formula of red dye type neutral ink:

[0028] Direct Acid Resistant Scarlet 4BS 81g

[0029] Condensing agent 68mL

[0030] Copolymer solution 29mL

[0031] Glycerin 125mL

[0032] Triethyl Phosphate 16mL

[0033] Triethanolamine 22mL

[0034] Distilled water 606mL

[0035] Preparation:

[0036] The first step of condensing agent preparation: use a graduated cylinder to measure 5 mL of concentrated sulfuric acid, 60 mL of formaldehyde, and 420 mL of distilled water, stir evenly at room temperature, and set aside;

[0037] Preparation of the second step copolymerization solution: weigh 15g of sulfosalicylic acid, measure 15mL of distilled water, stir to dissolve, then add 10mL of formaldehyde, 5mL of glacial acetic acid, stir and react at 50-60°C for 2.5h, set aside;

[0038] Step 3 Preparation of red neutral ink: (1) First weigh 81g of direct acid-resistant scarlet 4BS, measure 606mL of distilled water with a graduated cylinder, heat and stir to diss...

Embodiment 2

[0040] The specific formula of yellow dye neutral ink:

[0041] Direct Yellow 3GX 38g

[0042] Condensing agent 39mL

[0043] Copolymer solution 28mL

[0044] Glycerin 74mL

[0045] Triethyl Phosphate 24mL

[0046] Triethanolamine 14mL

[0047] Distilled water 749mL

[0048] Preparation:

[0049] The preparation of the first step condensation agent is with embodiment 1;

[0050] The preparation of the second step copolymerization liquid is with embodiment 1;

[0051] Step 3 Preparation of yellow neutral ink: (1) First weigh 38g of Direct Yellow 3GX, measure 749mL of distilled water with a graduated cylinder, heat and stir to dissolve it; (2) when the temperature rises to 70°C, add condensing agent 39mL and copolymer solution 28mL, reflux reaction for 2h, and the obtained product was left to cool; (3) continue to add 74mL of glycerin and 24mL of triethyl phosphate, and stir while adding; finally add 14mL of triethanolamine, continue to stir to make the ink system unifor...

Embodiment 3

[0053] The specific formula of blue-black dye-based neutral ink:

[0054] Direct Fast Blue 3RL 33g

[0055] Acid Green GB 25g

[0056] Condensing agent 50mL

[0057] Copolymer solution 20mL

[0058] Glycerin 65mL

[0059] Triethyl phosphate 15mL

[0060] Triethanolamine 22mL

[0061] Distilled water 738mL

[0062] Preparation:

[0063] The preparation of the first step condensation agent is with embodiment 1;

[0064] The preparation of the second step copolymerization liquid is with embodiment 1;

[0065] The third step is the preparation of blue-black neutral ink: (1) First weigh 33g of direct light-fast blue 3RL, 25g of acid green GB, measure 738mL of distilled water with a graduated cylinder, heat and stir to dissolve it; (2) when the temperature rises to At 75°C, add 50mL of condensing agent and 20mL of copolymerization solution, reflux for 1 hour, and let it cool; (3) continue to add 65mL of glycerin and 15mL of triethyl phosphate, and stir while adding; finally...

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PUM

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Abstract

The invention provides a dye type neutral ink. The dye type neural ink comprises five colors of red, yellow, blue back, orange and green; the dye type neutral ink comprises the compositions of water-solubility dye, condensing agent, copolymerization liquid, glycerin, lubricant, hygroscopic agent and distilled water. The preparation method comprises the following steps that: concentrated sulphuric acid, formaldehyde and water are adopted and mixed to prepare the condensing agent; salicylsulfonic acid is adopted and added with the distilled water for dissolution, then the formaldehyde and acetic acid are added and condensed to prepare a copolymerization liquid; the water-solubility dye, the formaldehyde in the condensing agent and the copolymerization liquid have condensation reaction under the acid action to form a macromolecule dye, and the other compositions are added to prepare the dye type neutral ink. The method has simple preparation process and low cost; the prepared dye type neutral ink is smooth in writing, does not block a pen and has stable performance, good light fastness and water resisting property.

Description

1. Technical field [0001] The invention relates to an ink composition for writing, which specifically belongs to five dye-based inks of red, yellow, blue-black, orange and green suitable for neutral ballpoint pens. 2. Background technology [0002] The ink in the neutral ballpoint pen refill can be divided into dye type and pigment type. The handwriting written with pigment type ink has excellent light resistance and water resistance, but it is a big problem to solve the dispersion and stability of the pigment, and the cost is relatively high. Dye-based ink can be dissolved in water, the production process is simple, and the water is smooth; however, the light resistance and water resistance of the written handwriting are poor. To improve its performance, a certain amount of thickener and water-resistant agent should be added to the formula. , so that the ink system is unstable, the writing is uneven, and even the nib is blocked. [0003] Chinese Patent Publication No. CN 1...

Claims

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Application Information

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IPC IPC(8): C09D11/18
Inventor 郝利玲林培华李笃信宋胜梅韩静董川
Owner SHANXI UNIV
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