Black ink for gel pen and preparation method thereof

A gel pen and black technology, which is applied in the field of black ink for gel pen and its preparation, can solve the problems that the stability needs to be further improved, cannot be applied on a large scale, and the ink discharges unevenly, etc., and achieves stable and constant viscosity and Good compatibility, solve the problem of ink penetration, and smooth writing effect

Active Publication Date: 2011-12-07
杭州华大海天科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic gel pen inks cannot be used on a large scale due to their shortcomings in stability and fluency
However, the matching between imported ink and domestically produced nibs is poor, and domestically produced gel pen inks still have some problems due to technical reasons: 1. Poor stability, short shelf life, and stratification after long-term storage 1. Precipitation phenomenon, when writing, there will be problems such as disconnection and clogging of the pen head; 2. Poor temperature resistance, when the temperature changes, the ink will be spit out unevenly, and ink leakage or line breakage will easily occur; 3. The cap removal time is short
The neutral pen ink has simple process, low cost, bright color and excellent writing performance, but its stability needs to be further improved

Method used

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  • Black ink for gel pen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of carbon black slurry: (1) Dissolve 0.1g sodium polystyrene sulfonate (Aldrich company, molecular weight is ~ 70000) in 59.3g deionized water, adjust the pH value to 8 with ammonia water to obtain an aqueous solution of anionic dispersant, then add 35g carbon black is in the anionic dispersant aqueous solution, high speed (rotating speed is 400 rev / mins) stirs 0.5 hour and carbon black is fully wetted, then adds 0.1g polydimethyl diallyl ammonium chloride salt cation (Aldrich company, Molecular weight is 100,000-200,000), high-speed (400 rpm) stirring for 0.5 hours to obtain a product, and complete an electric double layer assembly;

[0045] (2) Add 5g of anionic polyacrylic acid grinding resin U.S. Johnson (Johnson) J678 to the primary product in step (1), and 0.5g organosiloxane defoamer (German Bicker's defoamer, BYK -019), after stirring and mixing evenly, sand mill for 4 hours to obtain 100g carbon black slurry.

[0046] Preparation of neutral ink: a....

Embodiment 2

[0051] Preparation of carbon black slurry: (1) Dissolve 3g sodium polystyrene sulfonate (Sigma company, molecular weight is ~ 70000) in 36.5g deionized water, adjust the pH value to 8 with ammonia water to obtain an aqueous solution of anionic dispersant, then add 45g Carbon black is in the anionic dispersant aqueous solution, and high speed (rotating speed is 600 rev / mins) stirs 0.5 hour and carbon black is fully wetted, then adds 3g polydimethyl diallyl ammonium chloride salt cation (Aldrich company, molecular weight is 100000~200000), high-speed (600 rpm) stirring for 0.5 hours to obtain a product and complete an electric double layer assembly;

[0052] (2) Add 12g of anionic polyacrylic acid grinding resin U.S. Johnson (Johnson) J678 in the primary product in step (1), and 0.5g organosiloxane defoamer (Bick company defoamer of Germany, BYK -019), after stirring and mixing evenly, sand mill for 4 hours to obtain 100g carbon black slurry.

[0053] Preparation of neutral ink...

Embodiment 3

[0058] Preparation of carbon black slurry: (1) Dissolve 0.5g of fatty alcohol polyoxyethylene ether sodium sulfate (South Africa Sasol AES270N) in 55.5g of deionized water, adjust the pH value to 9.5 with ammonia water to obtain an aqueous solution of anionic dispersant, and then add 35g Add carbon black to the aqueous solution of anionic dispersant, stir at high speed (1000 rpm) for 0.5 hours to fully wet the carbon black, then add 0.5g polymethacryloyloxyethyl N-butyl, N, N-di Methyl ammonium bromide cation (molecular weight 10000-50000), high-speed (1000 rpm) stirring for 0.5 hours to obtain a product, complete an electric double layer assembly;

[0059] (2) Add 8g of anionic polyacrylic acid grinding resin Rohm & Haas (Rohm&Haas) M-101 to the primary product in step (1), and 0.5g of organosiloxane defoamer (Bick, Germany defoamer) agent, BYK-019), after stirring and mixing evenly, sand milling for 4 hours to obtain 100g of carbon black slurry.

[0060] Neutral ink prepara...

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Abstract

The invention discloses a black ink for a gel-ink pen and a preparation method thereof. The black ink comprises the following raw materials by weight percent: 30%-40% of carbon black slurry, 5%-30% of organosilicon modified acrylic resin emulsion, 10%-30% of solvent, 0.3%-0.8% of thickening agent, 1%-3% of pH regulator, 0.2%-2.0% of lubricant, 0.3%-2.0% of antirust additive, 0.2%-2.0% of preservative, 0.02%-0.5% of defoamer and the balance of deionized water. The ink has the advantages of uniform dispersion, appropriate viscosity, high system stability, good high-low temperature resistance and the like; and the prepared gel-ink pen is smoothly used for writing without leakage, has long uncapping time and can be used for normally writing under the environment of minus 20 DEG C-60 DEG C. The invention also discloses the preparation method of the ink. The preparation method has the characteristics that the process is easy to control and convenient for regulation.

Description

technical field [0001] The invention relates to the field of ink and its preparation, in particular to a black ink for a gel pen and a preparation method thereof. Background technique [0002] Gel pen (that is, neutral ink pen) has become the most popular in the world because of its smooth and lubricated writing, clear writing, good color, quick-drying, non-stick, water-resistant, light-resistant, and long shelf life. a writing instrument. The viscosity of the ink used in the gel pen is between the viscosity of the oily ballpoint pen ink (1000-20000mPa·s) and the viscosity of the water-based ballpoint pen ink (<10mPa·s), and has good thixotropy. The ink for the gel pen is stored in When in the pen tube, the ink is in a high viscosity state to prevent the ink from leaking through the nib; when writing, when the ball in the nib slides, the shear force generated will thin the ink and reduce the viscosity, so that the ink can flow through the nib for writing. [0003] my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/16C09D11/18
Inventor 吴起林贤福吕德水
Owner 杭州华大海天科技股份有限公司
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