阅读说明：本技术 一种高稳定速干中性墨水及其生产工艺 (high-stability quick-drying gel ink and production process thereof ) 是由 邱智铭 于 2019-06-17 设计创作，主要内容包括：本发明公开了一种高稳定速干中性墨水及其生产工艺,该墨水由如下重量分数的材料构成：着色剂40-60％、超分散剂2-8％、助分散剂0.1-0.7％、消泡剂0.4-1％、增稠剂0.2-0.6％、水溶润滑剂0.2-0.8％、防腐剂0.02-0.2％、整合剂1-4％、余量为去离子水。本发明利用超分散剂的弱极性基团对墨水色料表面实施多点描固改性,形成化学键接,实现了颜料的位阻保护,从而使颜料维持稳定的分散状态,改变了传统技术中对于颜料越细性能越好的认知,对传统技术中国产中性墨水色泽暗淡、稳定性差,长时间放置后容易堵塞笔头、干燥时间差异较大的问题进行了有效的改善。通过超分散剂、增稠剂、PH调节剂配合使用,可以实现铺展速度和出墨量的均匀,从而达到书写后墨水速干的目的。(The invention discloses a high-stability quick-drying neutral ink and a production process thereof, wherein the ink is prepared from the following materials in parts by weight: 40-60% of colorant, 2-8% of hyperdispersant, 0.1-0.7% of auxiliary dispersant, 0.4-1% of defoaming agent, 0.2-0.6% of thickening agent, 0.2-0.8% of water-soluble lubricant, 0.02-0.2% of preservative, 1-4% of integrating agent and the balance of deionized water. The invention utilizes the weak polar group of the hyper-dispersant to carry out multi-point drawing modification on the surface of the ink pigment to form chemical bonding, thereby realizing the steric protection of the pigment, keeping the pigment in a stable dispersion state, changing the cognition that the finer the pigment is, the better the performance in the traditional technology, and effectively improving the problems of the traditional technology that the neutral ink produced in China has dull color and luster, poor stability, easy blockage of a pen point after long-time placement and larger difference of drying time. The super-dispersant, the thickener and the PH regulator are used in a matching way, so that the spreading speed and the ink output can be uniform, and the purpose of quickly drying the ink after writing is achieved.)

1. A high-stability quick-drying neutral ink is characterized in that:

the ink is composed of the following materials in parts by weight: 40-60% of colorant, 2-8% of hyperdispersant, 0.1-0.7% of auxiliary dispersant, 0.2-1% of pH regulator, 0.4-1% of defoamer, 0.2-0.6% of thickening agent, 0.2-0.8% of water-soluble lubricant, 0.02-0.2% of preservative, 1-4% of integrating agent and the balance of deionized water.

2. the high-stability quick-drying neutral ink according to claim 1, wherein:

the colorant is carbon black;

The auxiliary dispersing agent is one or a mixed solution of ethylene glycol and propylene glycol;

The defoaming agent is one or more of polyether modified polyether, organic silicon, polysiloxane and C7-C15 higher alcohol;

The water-soluble lubricant is phosphate;

The pH regulator is one or more of triethanolamine, diethanolamine, ethanolamine and 2-amino-2-methyl-1-propanol;

The thickening agent adopts one or more of oxhide gelatin and acrylate.

3. the high-stability quick-drying neutral ink according to claim 2, wherein: the ratio of the ethylene glycol/propylene glycol mixed solvent is 1:1, 1:2 or 2: 1.

4. The high-stability quick-drying neutral ink according to claim 1, wherein: the hyper-dispersant adopts one of benzidine sulfonic acid derivatives or polyester chains.

5. A production process of high-stability quick-drying neutral ink is characterized by comprising the following steps:

The process comprises the following steps:

s1, mixing the weight ratio of 5: heating 1 volume fraction of 12-hydroxystearic acid and inert solvent to 120-180 ℃, then taking out water formed in the polymerization reaction through distillation, and then distilling at the temperature of 140-150 ℃ for 4-16h to remove the solvent to obtain the polyhydroxyalkanoate hyperdispersant;

s2, placing the carbon black in a mortar for grinding, then carrying out vacuum drying for 12h at 80 ℃, taking out and placing in a dryer for later use;

S3, adding a certain amount of hyper-dispersant and thickener into deionized water, adding defoamer and dispersion aid, stirring at 3500-4500rpm by using a magnetic stirrer at the temperature of 10-30 ℃ to fully dissolve the dispersant, continuously stirring for 3-6h, adding preservative, and continuously stirring to prepare mixed solution;

s4, adding the pigment into the prepared mixed solution, heating and stirring the mixed solution in water bath at the temperature of 40-60 ℃ for 4-8h, standing the mixed solution for 1h after heating for 2h, and continuously heating the mixed solution, wherein the stirring speed is increased when stirring at intervals each time;

And S5, adding the premix into a pH regulator to adjust the pH value of the system to be more than 7, adding the premix into a medium ball mill, adjusting the filling ratio to be within 60-70%, adjusting the grinding speed to be 1300-1600rpm/min, and grinding for a certain time to obtain the quick-drying neutral ink.

6. the process for producing the high-stability quick-drying neutral ink according to claim 5, wherein: the inert solvent is one of hexane, cyclohexane, dimethyl caprylate and chloroalkyl esters.

7. The process for producing the high-stability quick-drying neutral ink according to claim 5, wherein: the grinding medium of the medium ball mill is yttrium-stabilized zirconia ceramic microspheres with the bead diameter of 0.2-0.4mm, the feeding pump speed of the medium ball mill is 30-40rpm, and the volume filling rate is 60-80%.

Technical Field

The invention relates to the technical field of neutral ink, in particular to high-stability quick-drying neutral ink and a production process thereof.

Background

The gel pen has the advantages of a fountain pen and an oil ball pen, is comfortable in writing hand feeling, low in ink viscosity, and added with easily-lubricated substances, and the viscosity of a writing medium is between that of water and oil, so that the gel pen is smoother than the common oil ball pen, and is an upgrading and updating product of the oil ball pen. Carbon black or organic pigment is generally used as a colorant for pigment type neutral ink, but because the pigment type neutral ink is water-insoluble pigment particles, the penetration on paper is slow, the drying time of stitches is longer than that of dye type neutral ink, and through years of development, although the sales of neutral pens in China is in the front of the world, the ink is imported, although a great deal of research is carried out on the preparation technology of neutral ink in China, the important dispersion problem in the neutral ink is still not solved, so that the produced neutral ink is dull in color and poor in stability, a pen point is easy to block after being placed for a long time, the size, the uniformity and the drying time of the stitches after being written are large and difficult to control, and therefore, a neutral ink which is quick to dry and high in stability is urgently needed to meet the demand.

Disclosure of Invention

the invention aims to solve the problem that the dispersion of the neutral ink is not well solved, and provides a high-stability quick-drying neutral ink and a production process thereof. In order to achieve the purpose, the invention adopts the following technical scheme:

A high-stability quick-drying neutral ink is composed of the following materials in parts by weight: 40-60% of colorant, 2-8% of hyperdispersant, 0.1-0.7% of auxiliary dispersant, 0.2-1% of pH regulator, 0.4-1% of defoamer, 0.2-0.6% of thickening agent, 0.2-0.8% of water-soluble lubricant, 0.02-0.2% of preservative, 1-4% of integrating agent and the balance of deionized water;

The colorant is carbon black;

The auxiliary dispersing agent is one or a mixed solution of ethylene glycol and propylene glycol;

The defoaming agent is one or more of polyether modified polyether, organic silicon, polysiloxane and C7-C15 higher alcohol;

The water-soluble lubricant is phosphate;

The pH regulator is one or more of triethanolamine, diethanolamine, ethanolamine and 2-amino-2-methyl-1-propanol;

The thickening agent adopts one or more of oxhide gelatin and acrylate.

In the neutral ink, the proportion of the ethylene glycol/propylene glycol mixed solvent is 1:1, 1:2 or 2: 1.

In the neutral ink, the hyper-dispersant adopts one of benzidine sulfonic acid derivative or polyester chain.

the invention also discloses a production process of the high-stability quick-drying neutral ink, which comprises the following steps:

s1, mixing the weight ratio of 5: heating 1 volume fraction of 12-hydroxystearic acid and inert solvent to 120-180 ℃, then taking out water formed in the polymerization reaction through distillation, and then distilling at the temperature of 140-150 ℃ for 4-16h to remove the solvent to obtain the polyhydroxyalkanoate hyperdispersant;

S2, placing the carbon black in a mortar for grinding, then carrying out vacuum drying for 12h at 80 ℃, taking out and placing in a dryer for later use;

S3, adding a certain amount of hyper-dispersant and thickener into deionized water, adding defoamer and dispersion aid, stirring at 3500-4500rpm by using a magnetic stirrer at the temperature of 10-30 ℃ to fully dissolve the dispersant, continuously stirring for 3-6h, adding preservative, and continuously stirring to prepare mixed solution;

S4, adding the pigment into the prepared mixed solution, heating and stirring the mixed solution in water bath at the temperature of 40-60 ℃ for 4-8h, standing the mixed solution for 1h after heating for 2h, and continuously heating the mixed solution, wherein the stirring speed is increased when stirring at intervals each time;

and S5, adding the premix into a pH regulator to adjust the pH value of the system to be more than 7, adding the premix into a medium ball mill, adjusting the filling ratio to be within 60-70%, adjusting the grinding speed to be 1300-1600rpm/min, and grinding for a certain time to obtain the quick-drying neutral ink.

In the above process, the inert solvent is one of hexane, cyclohexane, dimethyl caprylate and chloroalkyl esters.

in the process, the grinding medium of the medium ball mill is yttrium-stabilized zirconia ceramic microspheres with the bead diameter of 0.2-0.4mm, the feeding pump speed of the medium ball mill is 30-40rpm, and the volume filling rate is 60-80%.

The invention has the beneficial effects that:

The invention utilizes the weak polar group of the hyper-dispersant to carry out multi-point drawing modification on the surface of the ink pigment to form chemical bonding, thereby realizing the steric protection of the pigment, keeping the pigment in a stable dispersion state, changing the cognition that the finer the pigment is, the better the performance in the traditional technology, and effectively improving the problems of the traditional technology that the neutral ink produced in China has dull color and luster, poor stability, easy blockage of a pen point after long-time placement and larger difference of drying time. Through the cooperation of hyper-dispersant, thickener, PH regulator, can realize the even of spreading speed and ink output on the one hand to reach the purpose of writing back ink rapid-curing cutback, on the other hand has also avoided the easy problem of caking of traditional rapid-curing cutback ink.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.