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Water-based durable erasable ink and preparation method thereof

An ink and long-lasting technology, applied in the field of water-based long-lasting erasable ink and its preparation, can solve the problem of writing trace reproduction and other problems, and achieve the effect of bright writing and high storage stability

Active Publication Date: 2021-06-25
SHANGHAI NNW NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the erasable ink in the prior art must use matching rubber and the writing marks will reappear at low temperature, the present invention provides a water-based durable erasable ink Ink and its preparation method. The ink can be written on ordinary paper, the surface of furniture and wood, and even on the wall. The pen using the ink is bright in color after writing, can be easily wiped off with an ordinary eraser, and is durable and erasable. After at least one month Wipe again and still leave no trace

Method used

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  • Water-based durable erasable ink and preparation method thereof
  • Water-based durable erasable ink and preparation method thereof
  • Water-based durable erasable ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Red ink

[0046] (a) Add 2% glycerin, 19% peelable resin PRIMAL PC-25, 4% dispersant DISPERBYK-2080 and 70% deionized water to the reaction kettle at the same time, then stir at room temperature for 10 minutes, Then add 2% GW-G25, and continue stirring for 1.5 hours;

[0047] (b) Under the condition of stirring, add 1% xanthan gum and 1% fumed silica successively, stir at room temperature for 1 hour, transfer to a sand mill after stirring, and grind until the average particle diameter is 600nm , D90 is 900nm.

[0048] (c) Under the condition of stirring, finally add 1% of wetting and leveling agent BYK-346, and stir at room temperature for 1 hour. Water-based ink that can be wiped on paper can be obtained by filtering with a 400-mesh filter cloth.

Embodiment 2

[0049] Example 2: Green ink

[0050] (a) Add 2.5% glycerin, 30% peelable resin PRIMAL PC-25, 4% dispersant DISPERBYK-2096 and 56.7% deionized water into the reaction kettle at the same time, stir at room temperature for 10 minutes, and then Add 4% GW-G21, and continue stirring for 1.5 hours;

[0051](b) Under the condition of stirring, add 0.8% xanthan gum and 1.2% fumed silica successively, stir at room temperature for 1 hour, transfer to a sand mill after stirring and grind until the average particle diameter is 580nm , D90 is 950nm.

[0052] (c) Under the condition of stirring, finally add 0.8% of wetting and leveling agent BYK-348, and stir at room temperature for 1 hour. Water-based ink that can be wiped on paper can be obtained by filtering with a 400-mesh filter cloth.

Embodiment 3

[0053] Embodiment 3: yellow ink

[0054] (a) 2% propylene glycol, 40% peelable resin NeoPac E-251, 5% dispersant DISPERBYK-2096 and 42.5% deionized water were simultaneously added to the reactor, then stirred at room temperature for 10 minutes, Then add 6% GW-G22, and continue stirring for 1.5 hours;

[0055] (b) Under stirring conditions, add 1.5% xanthan gum and 1.5% silicon dioxide successively, stir at room temperature for 1 hour, transfer to a sand mill after stirring and grind until the average particle size is 550nm, D90 is 880nm.

[0056] (c) Under the condition of stirring, finally add 1.5% of wetting and leveling agent BYK-348, and stir at room temperature for 1 hour. Water-based ink that can be wiped on paper can be obtained by filtering with a 400-mesh filter cloth.

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Abstract

The invention discloses water-based durable erasable ink and a preparation method thereof. A peelable resin selected by the invention can form an erasable film on the paper, and by matching with the fluorescent pigment with a relatively large particle size, the pigment can be wrapped before the pigment permeates into the paper and an erasable colored film is formed, so that an excellent erasable effect is obtained. In addition, xanthan gum and fumed silica are anti-settling agents and can keep ink uniform all the time, a dispersing agent can keep pigment stable, and a wetting leveling agent can help resin to isolate paper to form a uniform film. The ink is easy to erase, the erasability of the ink does not change along with the change of temperature, and the problem that writing traces reappear along with the reduction of the temperature does not occur.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a water-based durable erasable ink and a preparation method thereof. Background technique [0002] Some erasable inks are disclosed in the prior art. For example, the Chinese Patent Publication No. is that the patent application of CN97107744.4 discloses a writing ink that can be wiped off and not soaked. The ink is composed of vat dyes, chlorides, hydrogen peroxide, starch, and water. The characteristic of this erasable ink is that it can be wiped off freely within 5-10 minutes after writing, and it is very firm and does not fade after 5-10 minutes. Chinese Patent Publication No. CN95197637.0 patent application discloses an erasable ink composition, which contains a water-insoluble polymer dye, which is obtained through the polymerization of at least two co-reacted multifunctional monomers. Chinese patent application number is 98126115.9 The formula of the erasable i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/16
CPCC09D11/16
Inventor 李飞虎钱炜钱皓
Owner SHANGHAI NNW NEW MATERIALS TECH
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