CN108276830A - A kind of ceramic ink jet printing water-based ink and preparation method thereof - Google Patents

Abstract

The invention relates to a water-based ink for ceramic ink-jet printing, which is prepared from the following raw materials in parts by weight: 20-50 parts of ceramic colorant, 2-7 parts of dispersant, 2-5 parts of surfactant, resin-bonded 2 to 3 parts of agent, 2 to 6 parts of regulator, 0.1 to 0.5 parts of auxiliary agent, and 100 parts of water. The water-based ink of the invention does not contain toxic organic solvents, is processed through a mechanical dispersion process, reaches certain physical and chemical indicators, has excellent comprehensive performance, low cost, strong practicability, and can adapt to most inkjet printers on the market.

Description

Water-based ink for ceramic inkjet printing and preparation method thereof

technical field

The invention relates to the technical field of ceramic inkjet printing, in particular to an ink used in ceramic inkjet printing.

Background technique

With the development of market economy and computer technology, the existing traditional ceramic decoration methods can no longer meet the needs of the market. The introduction of modern computer technology is an inevitable trend in the future development of ceramic product design. At present, the new process inkjet printing technology for moldless molding is becoming a research hotspot worldwide, and various ceramic inks matching it have also appeared one after another. Inkjet printing is a very potential decoration technology. The method is to make colorants into multi-color inks for ceramic surface decoration, and print multi-color inks directly onto the ceramic surface for decoration through a computer-controlled printer.

One of the keys to ceramic inkjet technology lies in the development of ceramic inks. Most of the solvent-based ceramic inks currently used in mainstream applications are esters, hydrocarbons, etc., which have high production costs, contain volatile toxic substances, and are harmful to the environment. Water-based ink, on the other hand, uses water as the carrier of pigment particles, does not contain volatile and toxic organic solvents, is an environmentally friendly ink, conforms to the future development trend of ceramic inks, and can reduce costs and enhance product competitiveness. However, due to the formula and process of the existing water-based ink, after printing on the glaze surface, the drying speed of the center and the surrounding area is different, and ink bleeding occurs, resulting in a decrease in pattern resolution and color uniformity.

Contents of the invention

The object of the present invention is to provide a water-based ink for ceramic inkjet printing, which is prepared from the following raw materials in parts by weight: 20-50 parts of ceramic colorant, 2-7 parts of dispersant, 2-5 parts of surfactant, 2-3 parts of resin binder, 2-6 parts of regulator, 0.1-0.5 parts of auxiliary agent, and 100 parts of water.

The ceramic ink produced by using the above formula does not contain volatile toxic substances, is an environmentally friendly ink, and has a low cost. It solves the problems of ink bleeding, low pattern resolution, and poor color uniformity in the application of water-based inks. Strong hair color and good stability.

Preferably, the ceramic coloring material is cobalt blue, reddish brown, cobalt black, praseodymium yellow, wrapped yellow, wrapped red or zircon iron red;

Further preferably, the ceramic colorant is prepared by a hydrothermal method, a precipitation method or a solid phase method.

Preferably, the dispersant is one or more of adducts of fatty acid and ethylene oxide, polyethyleneimine derivatives, acrylic acid copolymer ammonium salt or polyacrylamide; preferably acrylic acid copolymer ammonium salt (GA40, purchased from Dispex).

Preferably, sodium dodecylbenzenesulfonate, sodium α-alkenylsulfonate or sodium fatty alcohol polyoxyethylene ether sulfate.

Preferably, the resin binder is a water-soluble acrylic modified resin; preferably styrene modified acrylic emulsion or epoxy resin modified acrylate.

Preferably, the regulator is a preparation obtained by mixing 1,2-propanediol and diethylene glycol at a volume ratio of 1:0.5-5.

Preferably, the auxiliary amount is one or more of defoamers, conductivity regulators, and preservatives.

As preferred scheme, aqueous ink of the present invention is prepared from by the raw material of following weight part:

35-42 parts of ceramic pigments, 3.5-4.6 parts of dispersants, 3.7-4.5 parts of surfactants, 2.3-2.8 parts of resin binders, 4.4-5.5 parts of regulators, 0.2-0.4 parts of additives, and 100 parts of water;

The ceramic pigment is cobalt blue, red brown, cobalt black, praseodymium yellow, wrapped yellow, wrapped red or zirconium iron red prepared by hydrothermal method, precipitation method or solid phase method, and the dispersant is acrylic acid copolymerized ammonium salt, the surfactant is sodium dodecylbenzene sulfonate, sodium α-alkenyl sulfonate or fatty alcohol polyoxyethylene ether sodium sulfate, and the resin binder is styrene-modified acrylic emulsion or ring Oxygen resin modified acrylate; the regulator is a preparation obtained by mixing 1,2-propanediol and diethylene glycol at a volume ratio of 1:1.5 to 3.3; the additives are defoamers, conductivity regulators, and preservatives one or more of them.

The present invention also provides the preparation method of water-based ink described in the application, comprises the steps:

1) Add the dispersant to the water and stir evenly, then add the ceramic colorant and stir evenly, then add the surfactant, resin binder and regulator, and then pre-grind with a ball mill for 2-5 hours after stirring evenly, the grinding medium is zirconia balls , the size is between 3mm-5mm, and then it is ground by a horizontal sand mill. The temperature is between 30°C and 55°C, and the particle size D50 is between 0.30-0.70μm, and the D100 is less than 1.5μm;

2) Add additives to the above-mentioned mixed liquid after grinding, adjust the solid content of the mixed liquid to 20-50wt%, the viscosity to 16-24mPa·s (40°C), the electrical conductivity to greater than 100ms/m, and the surface tension to 20-30mN/m , pH 7-9, the water-based ink is obtained by filtering through the filter core in one to three stages.

The ink prepared by the above process has a narrow particle size distribution, no large particles, good ink stability, and smooth inkjet printing process, which greatly reduces the problems of nozzle clogging and wire pulling during the inkjet process.

Water-based ink of the present invention has the following beneficial effects:

The water-based ink of the present invention does not contain toxic organic solvents. Its ingredients include ceramic pigments, dispersants, surfactants, conductivity regulators, defoamers, pure water, etc. After the mechanical dispersion process, it reaches a certain physical and chemical index, good stability and strong color development, which solves the problems of water-based ink bleeding, low pattern resolution, and poor color uniformity in the application. The ink particle size distribution is narrow and stable. Good performance, strong color development ability, low cost, and can adapt to most inkjet printers on the market.

Detailed ways

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Example 1

This embodiment relates to a water-based ink for ceramic inkjet printing, which is prepared from the following raw materials in parts by weight:

40 parts of praseodymium yellow ceramic pigment, 4.6 parts of dispersant acrylic acid copolymer ammonium salt (GA40), 3.7 parts of surfactant sodium dodecylbenzene sulfonate, 2.8 parts of resin binder styrene-modified acrylic emulsion, 4.4 parts of regulator part, the regulator is made by mixing 1,2-propanediol and diethylene glycol in a volume ratio of 1:1.5, 0.3 part of auxiliary agent, the auxiliary agent consists of defoamer (simethicone), conductivity regulator (1 % sodium sulfate solution), preservative (Nordes C15 bactericidal preservative) mixed in a weight ratio of 2:1:3, and 100 parts of water are added.

The water-based ink described in the present embodiment is prepared by the following method:

1) Add the dispersant to the water and stir evenly, then add the ceramic pigment and stir evenly, then add the surfactant, resin binder and regulator, and then pre-grind for 3 hours with a ball mill, the grinding medium is zirconia balls, the size 3mm, and then use a horizontal sand mill to grind, the grinding medium is zirconia balls, the size is 0.6mm, the filling degree of the grinding medium is between 60%, the cooling water is circulated, the temperature is controlled between 30°C and 55°C, and the grinding is until the particle size D50 is 0.45μm, D100 is 0.9μm;

2) Add additives to the above-mentioned ground mixed solution, adjust the viscosity of the mixed solution to 19mPa·s (40°C), conductivity to 1320ms/m, surface tension to 24mN/m, pH=7.9, and filter through three stages, namely Obtain the water-based ink.

The water-based ink prepared in this example has good stability, can print normally, and does not bleed ink. It is calcined in a furnace at 1130°C and kept for 30 minutes. The pattern resolution is high, and the chromaticity value L=90.34, a=-13.35, b=58.9 , good hair color, no harm to the environment, and low cost.

Example 2

35 parts of cobalt blue ceramic pigment, 3.5 parts of dispersant acrylic acid copolymer ammonium salt (GA40), 4.5 parts of surfactant α-alkenyl sulfonate sodium, 2.3 parts of resin binder styrene-modified acrylic emulsion, 5.5 parts of regulator , the regulator is mixed with 1,2-propanediol and diethylene glycol at a volume ratio of 1:2 and the auxiliary agent is 0.3 parts, and the auxiliary agent is composed of defoamer (simethicone oil), preservative (NordesC15 bactericidal preservative) by weight It is made by mixing at a ratio of 2:3, and the water makes up 100 parts.

The water-based ink described in the present embodiment is prepared by the following method:

1) Add the dispersant to the water and stir evenly, then add the ceramic colorant and stir evenly, then add the surfactant, resin binder and regulator, and pre-grind with a ball mill for 2.5 hours after stirring evenly, the grinding medium is zirconia balls, the size 3mm, and then use a horizontal sand mill to grind, the grinding medium is zirconia balls, the size is 0.3mm, the filling degree of the grinding medium is between 60%, the cooling water is circulated, the temperature is controlled between 30°C and 55°C, and the grinding is until the particle size D50 is 0.45μm, D100 is 0.9μm;

2) Add additives to the above-mentioned mixed liquid after grinding, adjust the viscosity of the mixed liquid to 21mPa·s (40°C), the electrical conductivity to 1220ms/m, the surface tension to 27mN/m, pH=7.8, and filter through the filter element for one stage, That is, the water-based ink is obtained.

The water-based ink prepared in this example has good stability, can print normally, and does not bleed. It is calcined in a furnace at 1130°C and kept for 30 minutes. The pattern resolution is high, and the chromaticity value L=40.54, a=12.51, b=-34.20 , good hair color, no harm to the environment, and low cost.

Example 3

This embodiment relates to a water-based ink for ceramic inkjet printing, which is prepared from the following raw materials in parts by weight:

42 parts of wrapped red ceramic colorant, 4.2 parts of dispersant acrylic acid copolymer ammonium salt (GA40), 3.7 parts of surfactant fatty alcohol polyoxyethylene ether sodium sulfate, 2.8 parts of resin binder epoxy resin modified acrylic emulsion, regulator 4.8 parts, the regulator is made by mixing 1,2-propanediol and diethylene glycol in a volume ratio of 1:3.3, the auxiliary agent is 0.3 parts, the auxiliary agent consists of defoamer (simethicone), preservative (Nordes C15 antiseptic agent) by mixing at a weight ratio of 1:2, and make up 100 parts of water.

The water-based ink described in the present embodiment is prepared by the following method:

1) Add the dispersant to the water and stir evenly, then add the ceramic pigment and stir evenly, then add the surfactant, resin binder and regulator, and then pre-grind for 3 hours with a ball mill, the grinding medium is zirconia balls, the size 3mm, horizontal sand mill for grinding, the grinding medium is zirconia balls, the size is 0.3mm, the filling degree of the grinding medium is 60%, the cooling water is circulated, the temperature is controlled between 30°C and 55°C, and the grinding is until the particle size D50 is 0.63μm, D100 1.2μm;

2) Add additives to the above-mentioned ground mixed solution, adjust the mixed solution viscosity to 21mPa·s (40°C), electrical conductivity to 1460ms/m, surface tension to 26mN/m, pH=8.1, and filter to obtain the water-based ink . Then enter the furnace for calcination at 1130°C and keep the temperature for 30 minutes.

The water-based ink prepared in this example has better stability, does not block the nozzle, does not pull the thread, can print normally, does not smear ink, has high pattern resolution, chromaticity value L=60.62, a=38.43, b=36.09, color development Good, no harm to the environment, and low cost.

Comparative example 1

This embodiment relates to a water-based ink for ceramic inkjet printing. Compared with Example 1, the difference is that the dispersant is polyethylene glycol 200, and the water-based ink prepared in this embodiment has general stability and does not clog The nozzle can print normally, but there is ink bleeding, the pattern resolution is low, the chromaticity value L=92.65, a=-13.15, b=46.32, and the color development is poor.

Comparative example 2

This embodiment relates to a water-based ink for ceramic inkjet printing. Compared with Example 1, the difference is that the regulator is glycerin, and the water-based ink prepared in this embodiment has poor stability and slight ink bleeding. Chromaticity value L==90.73, a=-13.21, b=54.36.

Comparative example 3

This embodiment relates to a water-based ink for inkjet printing of ceramics. Compared with Example 1, the difference lies in that the preparation method is to directly use a horizontal sand mill for grinding after stirring evenly. It is a zirconia ball with a size of 0.3mm and a filling degree of 65%. The prepared ink has average stability, and there are cases of blocked nozzles and wires. The chromaticity value L==90.81, a=-13.19, b=57.36.

Although, the present invention has been described in detail with general description, specific implementation and test above, but on the basis of the present invention, some modifications or improvements can be made to it, which will be obvious to those skilled in the art . Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (9)

1. a kind of ceramic ink jet printing water-based ink, which is characterized in that be prepared by the raw material including following parts by weight：Pottery 20~50 parts of porcelain color, 2~7 parts of dispersant, 2~5 parts of surfactant, 2~3 parts of resinoid bond, 2~6 parts of conditioning agent help 0.1~0.5 part of agent, water supplies 100 parts.

2. water-based ink according to claim 1, which is characterized in that the ceramic pigment is cobalt blue, reddish brown, cobalt black, praseodymium Yellow, package Huang, the red or zirconium-iron pink pigment of package；Preferably, the ceramic pigment is prepared by hydro-thermal method, the precipitation method or solid phase method It obtains.

3. water-based ink according to claim 1 or 2, which is characterized in that the dispersant is aliphatic acid and ethylene oxide One or more of addition product, polyethylenimine derivates, acrylic copolymer ammonium salt or polyacrylamide；Preferably third Olefin(e) acid copolymer ammonium salt.

4. water-based ink according to claim 1 or 3, which is characterized in that the surfactant is detergent alkylate sulphur Sour sodium, α-sodium olefin sulfonate or sodium sulfate of polyethenoxy ether of fatty alcohol.

5. water-based ink according to claim 1 or 4, which is characterized in that the resinoid bond is water-soluble acrylic Modified resin；Optimization styrene modified acrylic acid emulsion or epoxy resin modification acrylate.

6. water-based ink according to claim 1 or 5, which is characterized in that the conditioning agent is sweet by 1,2-PD and two Alcohol by volume 1：0.5~5 preparation being mixed to get.

7. water-based ink according to claim 1 or 6, which is characterized in that the amount of auxiliary is antifoaming agent, conductivity adjusting One or more of agent, preservative.

8. according to claim 1~7 any one of them water-based ink, which is characterized in that by including as follows by following parts by weight Raw material be prepared：35~42 parts of ceramic pigment, 3.5~4.6 parts of dispersant, 3.7~4.5 parts of surfactant, resin knot 2.3~2.8 parts of mixture, 4.4~5.5 parts of conditioning agent, 0.2~0.4 part of auxiliary agent, water supplies 100 parts；

The ceramic pigment is the cobalt blue being prepared by hydro-thermal method, the precipitation method or solid phase method, reddish brown, cobalt black, praseodymium yellow, package Yellow, the red or zirconium-iron pink pigment of package, the dispersant are acrylic copolymer ammonium salt, and the surfactant is detergent alkylate Sodium sulfonate, α-sodium olefin sulfonate or sodium sulfate of polyethenoxy ether of fatty alcohol, the resinoid bond are styrenated acrylic Lotion or epoxy resin modification acrylate；The conditioning agent is 1,2- propylene glycol and diethylene glycol (DEG) by volume 1：1.5~3.3 is mixed Close obtained preparation；The auxiliary agent is one or more of antifoaming agent, conductivity conditioning agent, preservative.

9. the preparation method of any one of claim 1~8 water-based ink, which is characterized in that include the following steps：

1) dispersant is added to the water and is stirred evenly, ceramic pigment is then added and stirs evenly, add surfactant, tree Fat bonding agent and conditioning agent, using ball mill pre-grinding 2-5 hours after stirring evenly, it is zirconia ball that mill, which is situated between, and size is between 3mm- 5mm；Then it is ground using horizontal sand mill, it is zirconia ball that mill, which is situated between, and size grinds Jie's compactedness between 0.3mm-1.5mm Between 50%-80%, cooling water circulation, between controlling 30 DEG C -55 DEG C of temperature, be ground to granularity D50 between 0.30-0.70 μm it Between, D100 is less than 1.5 μm；

2) auxiliary agent is added into the mixed liquor after above-mentioned grinding, adjusts the solid content 20-50wt% of mixed liquor, viscosity 16- 24mPas40 DEG C, conductivity is more than 100ms/m, surface tension 20-30mN/m, pH7-9, filters to get the aqueous ink Water.