CN104893420A - Colored ink for light-colored teaching board and preparation method of colored ink - Google Patents

Abstract

The invention discloses a color ink used for light-color teaching boards and a preparation method thereof. The ink components are by weight: 0.3-10% of dye, 0.5-15% of color developer, 0.5-10% of film-forming agent, Film-forming aid 0.1-6%, surfactant 0.05-7%, drier 0.01-5%, stripping agent 0.2-10%, lubricant 1-8%, plasticizer 0.1-5%, antifreeze 1 ~5%, solvent 40-85%. Preparation: (1) Take the solid material according to the proportion, add solvent, stir at room temperature to dissolve it completely; (2) Add other liquid materials according to the proportion, stir for 3-9 hours; place it for 1-3 days, and wait for the foam to subside completely Just fill the pen. The invention solves the problem that the ink on the light-colored teaching board cannot be wiped and written immediately. The ink not only writes smoothly, does not block the tip of the pen, but also fades when wiped or washed with water; and the handwriting written with the ink can be quickly dried and wetted Write dry erase, which can realize instant erasing and writing.

Description

A kind of color ink that can be used for light-color teaching board and its preparation method

technical field

The present invention relates to ink, in particular to a color ink that can be used for light-colored teaching boards and a preparation method thereof, in particular to a color ink that can be wiped/washed with water and faded, wet-written and dry-erased, and can be used for light-colored teaching boards Color ink and preparation method thereof.

Background technique

Chalk blackboard is a traditional teaching blackboard product, but the dust of chalk seriously pollutes the teaching environment and endangers the health of teachers and students. Many light-colored teaching boards and matching inks have appeared on the market at present to replace traditional chalk blackboards.

At present, the inks used in light-colored teaching boards on the market can be divided into two types according to the colorants used: one type uses pigments as colorants. , Long-term storage is prone to precipitation, and the color will become light or no color when writing again. In addition, because the pigment has a certain particle size, it is easy to clog the tip of the pen, and it will not be possible to write words when it is used after a long period of storage. The other type uses dyes as coloring agents. This ink is a solution system and is not easy to clog the pen tip. However, once the ink of these two colorant types is rubbed on the body or hands, it is difficult to wash off.

Chinese patent CN 102964924 B discloses a color ink that can be hydrolyzed and faded. The ink is prepared from dye-type colorants, binders, color developers, dispersants, solvents and spices. It has the advantages of simple preparation process and ink writing Smooth, handwriting can be washed with water to fade, dust-free and environmental protection and other advantages. Once the ink is rubbed on clothes or hands, it can be removed by scrubbing with water.

However, this type of ink has a fatal weakness, that is, after the written handwriting is erased, it cannot be written again until the board is dry. The phenomenon that the handwriting is shallow, that is, the problem that instant erasing and writing cannot be realized. This is exactly the problem that this type of ink cannot be promoted in the market so far.

Contents of the invention

The purpose of the present invention is to provide a kind of color ink that can be used for light-colored teaching boards and its preparation method for the problem that the existing light-colored teaching board inks cannot realize instant erasing and writing. The ink not only writes smoothly, does not block the tip of the pen, and can be faded with water rubbing/washing; moreover, the handwriting written with this ink can be dried quickly, can be wet written and dry erased, and can be erased and written immediately.

A kind of color ink that can be used for light-colored teaching board provided by the invention, component comprises by weight percentage:

The dyes are 3,3-bis(N-octyl-2-methylindole) phthalide, 6-dimethylamino-3,3-bis(4-dimethylaminophenyl) Phthalide, 3'-biphenylamino-6'-diphenylaminospiro[isobenzofuran-1,9'-oxyanthracene]-3-one, 3-(4-methylethylaminophenyl)-3- (4-Dimethylaminophenyl)-6-dimethylaminophthalide, 2'-(dibenzylamino)-6'-(diethylamino)fluorane, 3-dibutylamino-6-methyl-7 -anilinofluoran, 3-diethylamino-6-methyl-7-anilinofluoran, 2-(2',4'-dimethylanilino)-3-methyl-6-diethylamino Fluorane, 9-(2-methylanilino)benzofluorane or N,N-dimethyl-4-(2-(2-(octyloxy)phenyl)-6-phenylpyridine- 4-yl)aniline.

The developer is an organic acid, such as citric acid, oxalic acid, tartaric acid, formic acid, acetic acid, benzoic acid, or phthalic acid;

The film-forming agent is an alcohol-soluble resin or an alcohol-soluble polymer, such as an alcohol-soluble phenolic resin, acrylic resin, urea-formaldehyde resin, polyvinyl acetate resin, polyurethane, or polyvinyl butyral;

The film-forming aids are aliphatic ethers, higher aliphatic or aromatic esters, such as polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene cetyl ether, polyoxyethylene alkyl aryl ether , polyoxyethylene stearate, polyoxyethylene glyceride, or polyethylene glycol ester;

Described surfactant is common surfactant, as OP (OP-4, OP-7, OP-10), Tween (such as Tween 60, Tween 80), or Span (such as Span 60, span80);

The drier is cobalt naphthenate, zinc naphthenate, calcium naphthenate, manganese naphthenate, rare earth naphthenate, cobalt isooctanoate, zinc isooctanoate, calcium isooctanoate, manganese isooctanoate, dilaurate dibutyltin nitrate, or cobalt acetylacetonate;

The release agent used is at least one of organosilicon compound, small molecular polymer, such as silwet-7608, silwet-7607, silwet-7606, polyethylene glycol, polypropylene glycol, and polyglycerol;

Described lubricant is simethicone, poly(methoxysiloxane), n-butyl stearate, stearic acid, liquid paraffin, polyoxyethylene polymethylsiloxane, polyoxyethylene polyoxygen At least one of acrylic polymethylsiloxane;

Described plasticizer is phthalates, here specially used nontoxic and non-irritating environmental protection plasticizer diethylene glycol dibenzoate;

Described antifreezing agent is ethylene glycol, propylene glycol, glycerol, ethylene glycol butyl ether, propylene glycol butyl ether or ethylene glycol butyl ether acetate;

The solvent is ethanol and isopropanol in a volume ratio of 60-85:15-40; or ethanol and ethyl acetate in a volume ratio of 55-70:30-45.

The preparation method of ink, comprises the steps:

(1) Take the solid material according to the proportion, add solvent, stir at room temperature to make it all dissolve;

(2) Add other liquid materials according to the ratio, stir for 3-9 hours; leave it for 1-3 days, and fill the pen after all the foam subsides.

Compared with the prior art, the colored ink of the present invention is prepared by using dyes as coloring agents, together with film-forming agents, film-forming aids, surfactants, driers, stripping agents, lubricants and plasticizers. The handwriting written with the colored ink of the present invention can be dried quickly, and when the ink handwriting is erased, the spherical or rod-shaped film is rolled off, and the surface of the writing board can be kept clean and dry without affecting the secondary writing; if the ink is accidentally stained On hands or clothes, it can be removed by wiping or washing with water, and it is easy to clean; the ink will not clog the nib, and will not produce precipitation after a long time; the preparation process of the color ink is simple, no special equipment is required, and the raw materials are easy to obtain and the price is cheap .

Detailed ways

In the following examples:

The red dye is 3,3-bis(N-octyl-2-methylindole)phthalide;

Blue dye 1 is 6-dimethylamino-3,3-bis(4-dimethylaminophenyl)phthalide,

Blue dye 2 is 3'-biphenylamino-6'-diphenylaminospiro[isobenzofuran-1,9'-oxyanthracene]-3-one,

Blue dye 3 is 3-(4-methylethylaminophenyl)-3-(4-dimethylaminophenyl)-6-dimethylaminophthalide;

The green dye is 2'-(dibenzylamino)-6'-(diethylamino)fluoran;

Black dye 1 is 3-dibutylamino-6-methyl-7-anilinofluoran,

Black dye 2 is 3-diethylamino-6-methyl-7-anilinofluoran,

Black dye 3 is 2-(2',4'-dimethylanilino)-3-methyl-6-diethylaminofluoran;

The purple dye is 9-(2-methylanilino)benzofluorane;

The yellow dye is N,N-dimethyl-4-(2-(2-(octyloxy)phenyl)-6-phenylpyridin-4-yl)aniline.

Example 1

1. A red ink formula that can be wiped/washed and faded with water, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: add red dye, citric acid, polyvinyl butyral, polyoxyethylene cetyl ether and cobalt acetylacetonate into a 250mL beaker according to the weighed mass; then add a good volume of ethanol and isopropyl Alcohol, stir at room temperature until completely dissolved; then add other liquid components according to the formula, stir for 6 hours until the system is uniform, leave it for 2 days, and the pen can be used.

Example 2

1. A green ink formula that can be wiped/washed and faded with water, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add green dye, oxalic acid, alcohol-soluble polyurethane, polyoxyethylene alkyl aryl ether and manganese isooctanoate into a 250mL beaker according to the weighed mass, then add a good volume of ethanol and isopropanol, and stir at room temperature until it is completely dissolved; then add other liquid components according to the formula, stir for 5.5 hours until the system is uniform, leave it for 1 day, and the pen can be used.

Example 3

1. A blue ink formula that can be wiped/washed and faded with water, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add blue dye 1, formic acid, alcohol-soluble acrylate, polyoxyethylene lauryl ether, calcium naphthenate and n-butyl stearate into a 250mL beaker according to the weighed mass; then add a good volume of Ethanol and ethyl acetate, stirred at room temperature until completely dissolved; then add other liquid components according to the formula. Stir for 4 hours until the system is uniform, let it stand for 3 days, and the pen can be used.

Example 4

1. A blue ink formula that can be wiped/washed and faded with water, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add blue dye 2, oxalic acid, polyvinyl butyral, polyoxyethylene oleyl ether, zinc naphthenate and n-butyl stearate into a 250mL beaker according to the weight; Volume of ethanol and ethyl acetate, stirred at room temperature until completely dissolved; then add other liquid components according to the formula. Stir for 4 hours until the system is uniform, let it stand for 3 days, and the pen can be used.

Example 5

1. A blue ink formula that can be wiped/washed and faded with water, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add blue dye 3, citric acid, polyvinyl butyral, polyoxyethylene lauryl ether, calcium isooctanoate and n-butyl stearate into a 250mL beaker according to the weight; Volume of ethanol and ethyl acetate, stirred at room temperature until completely dissolved; then add other liquid components according to the formula. Stir for 5 hours until the system is uniform, leave it for 2 days, and the pen can be used.

Example 6

1. A purple ink formula that can be wiped/washed and faded, wet-written and dry-erased, and can be used on light-colored teaching boards:

2. Preparation process: Add purple dye, acetic acid, alcohol-soluble phenolic resin, polyoxyethylene oleyl ether, cobalt isooctanoate, n-butyl stearate and stearic acid into a 250mL beaker according to the weighed mass; volume of ethanol and ethyl acetate, stir at room temperature until completely dissolved; then add other liquid components according to the formula, and stir for 3 hours until the system is uniform. Placed for 1 day, the pen can be used.

Example 7

1. A black ink formula that can be wiped/washed and faded, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add black dye 1, benzoic acid, alcohol-soluble urea-formaldehyde resin, polyoxyethylene stearate, zinc naphthenate and n-butyl stearate into a 250mL beaker by mass; A good volume of ethanol and ethyl acetate was stirred at room temperature until completely dissolved; then the other liquid components were added in the recipe amounts. Stir for 8 hours until the system is uniform, let it stand for 3 days, and the pen can be used.

Example 8

1. A black ink formula that can be wiped/washed and faded, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add black dye 2, oxalic acid, polyvinyl butyral, polyoxyethylene stearate, zinc naphthenate and n-butyl stearate into a 250mL beaker according to mass; A good volume of ethanol and ethyl acetate was stirred at room temperature until completely dissolved; then the other liquid components were added in the recipe amounts. Stir for 7 hours until the system is uniform, leave it for 3 days, and the pen can be used.

Example 9

1. A black ink formula that can be wiped/washed and faded, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add black dye 3, tartaric acid, polyvinyl butyral, polyoxyethylene stearate, cobalt isooctanoate and n-butyl stearate into a 250mL beaker according to mass; Volume of ethanol and ethyl acetate, stirred at room temperature until completely dissolved; then add other liquid components according to the formula. Stir for 9 hours until the system is uniform, leave it for 3 days, and the pen can be used.

Example 10

1. A yellow ink formula that can be wiped/washed and faded, wet-written and dry-erased, and can be used for light-colored teaching boards:

2. Preparation process: Add yellow dye, oxalic acid, alcohol-soluble polyvinyl acetate resin, polyoxyethylene glyceride, Span-60, and dibutyltin dilaurate into a 250mL beaker according to the weighed mass, and then add a good amount Volume of ethanol and isopropanol, stir at room temperature until completely dissolved, then add other liquid components according to the formula, stir for 9 hours until the system is uniform, leave it for 2 days, and the pen can be used.

With the colored inks prepared in Examples 1-10, the handwriting can be dried quickly, and when the ink handwriting is erased, the spherical or rod-shaped film is rolled off, and the surface of the writing board remains dry, which does not affect the secondary writing; Precipitation will not clog the tip of the pen; smooth writing, bright colors, easy to erase, if it accidentally sticks to clothes or hands, it can be removed by wiping or washing with water; it is also very easy to clean the writing board regularly, the board eraser is stained with a little water Simply wipe away.

Claims (10)

1. a color inks for light-color teaching board use, it is characterized in that, components based on weight percentage comprises:

Described dyestuff is 3, two (N-octyl group-2 methyl indole) the O-phthalic lactone of 3-, 6-dimethylamino-3, two (4-dimethylaminophenyl) phthalide of 3-, 3 '-benzidino--6 '-two p-totuidine base spiral shell [isobenzofuran-1, 9 '-Oxidation Anthracene]-3-ketone, 3-(4-methylethylamino phenyl)-3-(4-dimethylamino phenyl)-6-dimethylamino phthalide, 2'-(dibenzyl is amino)-6'-(diethylin) fluorane, 3-dibutylamino-6-methyl-7-anilinfluorane, 3-diethylin-6-methyl-7-anilinfluorane, 2-(2 ', 4 '-xylidino)-3-methyl-6-diethylin fluorane, 9-(2-methylphenylamino) benzo fluorane or N, N-dimethyl-4-(2-(2-(octyl group oxygen base) phenyl)-6-phenylpyridine-4-base) aniline.

2. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described developer is organic acid.

3. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described membrane-forming agent is spirit-soluble resin or alcohol soluble macromolecular polymkeric substance; Described film coalescence aid is fatty ether, higher aliphatic or aromatic ester.

4. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described tensio-active agent is OP, tween or this Pan.

5. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described siccative is cobalt naphthenate, zinc naphthenate, calcium naphthenate, manganese naphthenate, naphthenic acid rare earth, cobalt iso-octoate, isocaprylic acid zinc, calcium iso-octoate, manganese iso-octoate, dibutyl tin laurate or acetylacetone cobalt.

6. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described stripper is at least one in silwet-7608, silwet-7607, silwet-7606, polyoxyethylene glycol, polypropylene glycol, polyglycerol.

7. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described lubricant is at least one in dimethyl silicone oil, poly-(methoxyl group siloxanes), n-butyl stearate, stearic acid, whiteruss, polyoxyethylene polymethyl siloxane, polyoxyethylene polyoxypropylene polymethyl siloxane.

8. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described softening agent is diethylene glycol dibenzoate.

9. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described frostproofer is ethylene glycol, propylene glycol, glycerol, butyl glycol ether, propandiol butyl ether or 2-Butoxyethyl acetate.

10. the color inks of a kind of light-color teaching board use as claimed in claim 1, it is characterized in that, described solvent is ethanol and the Virahol of 60-85 ︰ 15-40 by volume; Or the ethanol of 55-70 ︰ 30-45 and ethyl acetate by volume.