CN113025123A - Water-based ink with alcohol resistance and preparation method thereof - Google Patents
Water-based ink with alcohol resistance and preparation method thereof Download PDFInfo
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- CN113025123A CN113025123A CN201911253877.0A CN201911253877A CN113025123A CN 113025123 A CN113025123 A CN 113025123A CN 201911253877 A CN201911253877 A CN 201911253877A CN 113025123 A CN113025123 A CN 113025123A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
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Abstract
The invention provides a water-based ink with alcohol resistance and a preparation method thereof, and the water-based ink with alcohol resistance comprises the following components: water, polymer latex emulsion, hydroxyl acrylate monomer, functional assistant and pigment added according to the color requirement of the ink. A method for preparing aqueous ink with alcohol resistance includes such steps as adding hydroxy acrylic acid monomer to the aqueous ink containing water and latex emulsion of polymer latex. The problem of insufficient tolerance of aqueous ink alcohol solvents is solved, and the resistance of the ink-jet printing product to the alcohol solvents is effectively improved by adding the hydroxyl-containing acrylic monomer into the ink composition.
Description
Technical Field
The invention relates to water-based ink, in particular to water-based ink with alcohol resistance and a preparation method thereof.
Background
Inkjet printing is a fast, variable printing method. With the reduction of cost of printing equipment and the improvement of printing speed, resolution and printing quality, inkjet printers have been widely used in home, office and commercial printing, and have rapidly increased in large-format advertising and industrial printing. The ink-jet printing has the advantages of wide adaptability of base materials and non-contact printing.
There are a variety of ink types for inkjet printing, and industrial inkjet printing typically prints solvent-based and UV-curable inks from piezojets. Solvent-based inks are relatively low in cost and have good printability, but release large amounts of Volatile Organic Compounds (VOCs) that are considered hazardous air pollutants in applications.
UV inkjet inks have good adhesion on a variety of substrates and have low VOC content. However, UV inks often have an unpleasant odor and are irritating to the skin and eyes. Images printed using UV inks have a certain relief, which greatly affects the smoothness of the web and the stacked prints and is difficult to apply.
Aqueous inkjet inks are used primarily in the home and office environment. Many commercial inkjet printers use aqueous latex inks, such as wide format inkjet printers by hewlett-packard using thermal inkjet technology. Compared with solvent and UV ink, the water-based ink has better environmental protection property and is more suitable for printing products in buildings.
Through performance optimization, the water-based latex ink achieves better adhesion and durability on a plastic substrate, and can be used for printing of advertising rolls. Aqueous latex inks generally have some resistance to water after drying, but no resistance to alcoholic solvents. In some industrial applications, the printed matter is required to be resistant to cleaning by alcohol solvents, and ordinary aqueous latex ink cannot meet the requirements.
Disclosure of Invention
The invention provides an aqueous ink with alcohol resistance and a preparation method thereof, solves the problem of insufficient tolerance of an alcohol solvent of the aqueous ink, and effectively improves the resistance of an ink-jet printing product to the alcohol solvent by adding a hydroxyl-containing acrylic monomer into an ink composition.
The object of the invention is achieved in the following way: an aqueous ink having alcohol resistance comprising: water, polymer latex emulsion, hydroxyl acrylate monomer, functional assistant and pigment added according to the color requirement of the ink.
The hydroxyl acrylate monomer is at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate and hydroxybutyl methacrylate.
The weight of the hydroxyl acrylate monomer in the aqueous ink is more than 0% and less than or equal to 20%, preferably more than 0.2% and less than or equal to 10%, and more preferably more than 0.5% and less than or equal to 5%.
The hydroxyl acrylate monomer accounts for more than 0% and less than or equal to 50% of the weight of the polymer latex; preferably, the hydroxy acrylate monomer is greater than 0.5% and less than or equal to 20% by weight of the polymer latex; more preferably, the hydroxy acrylate monomer is greater than 2% and less than or equal to 10% by weight of the polymer latex.
The functional assistant is at least one of cosolvent, wetting agent, flatting agent, dispersant and emulsifier. Cosolvents such as propylene glycol, diethylene glycol, glycerol, dipropylene glycol ethers, and the like, such as BYK330 and BYK348, can be used as wetting agents and leveling agents, dispersants such as Disponer W-18, and the like, emulsifiers such as span 80, and the like.
The pigment types commonly used for the water-based ink are as follows: pigment blue 15:3, a mixture of pigment Red 202 and pigment Violet 19, pigment Red 122, pigment yellow 155, pigment yellow 74, carbon black, and the white pigment titanium dioxide.
A method for preparing aqueous ink with alcohol resistance includes such steps as adding hydroxy acrylic acid monomer to the aqueous ink containing water and latex emulsion of polymer latex.
A method of making an aqueous ink having alcohol resistance comprising the steps of, (1) first completing a latex encapsulation of pigment particles; (2) adding water, functional auxiliary agent and hydroxyethyl acrylate into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink with alcohol resistance suitable for ink-jet printing.
The invention has the following beneficial effects: the water-based ink can effectively improve the resistance of an ink-jet printing product to alcohol solvents, and is used for alcohol cleaning or process application using an alcohol-containing auxiliary agent. Compared with the invention, in the comparative example 2 of the application, in the preparation of the polymer latex emulsion, the hydroxy acrylate monomer is added for copolymerization, so that the obtained polymer latex has excessively strong surface hydrophilicity, increased viscosity, large action with pipelines and cavities of an ink-jet printing head, reduced ejection performance and ink break problem when the ink-jet frequency is higher, and the high-speed printing (5 kHz) printing performance is poor.
Detailed Description
An aqueous ink with alcohol resistance comprises water, pigment particles, acrylic polymer latex emulsion, hydroxyl acrylate monomer, functional auxiliary agent and the like.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex encapsulation of the pigment particles is accomplished first, and the advantages and technical solutions of this operation are well known in the art (particularly in the field of ink jet printing). The latex encapsulation can be carried out in situ polymerization (surface polymerization of monomers after pigment modification), or can be carried out by mixing the polymer latex emulsion with pigment particles under mechanical action such as ball milling, dispersion and the like after being independently prepared in advance. These solutions, when reasonably optimized, allow the complete or uniform encapsulation of the pigment particles by the polymer latex.
(2) Adding water and functional additives (cosolvent, wetting agent, flatting agent, dispersing agent and the like) into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing.
In the invention, the hydroxyl acrylate monomer can be added in the ink preparation process or after the ink preparation is finished, and the functions and effects of the ink are not obviously different.
Example 1
The water-based ink with alcohol resistance comprises the following raw materials in percentage by weight: 1.5% of pigment (black), 15% of polymer latex emulsion, 1.5% of hydroxypropyl acrylate, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex encapsulation of the pigment particles can be accomplished by in situ polymerization, which is well known in the art (particularly in the field of ink jet printing) to achieve complete or uniform encapsulation of the pigment particles by the polymer latex.
(2) Adding water, propylene glycol, dipropylene glycol DPG and a BYK330 flatting agent into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing;
(3) and (3) adding hydroxypropyl acrylate into the aqueous ink obtained in the step (2) to obtain the aqueous ink with alcohol resistance suitable for ink-jet printing.
Example 2
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (black), 15% of polymer latex emulsion, 1% of hydroxyethyl acrylate, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex encapsulation of the pigment particles can be accomplished by in situ polymerization, which is well known in the art (particularly in the field of ink jet printing) to achieve complete or uniform encapsulation of the pigment particles by the polymer latex.
(2) Adding water, propylene glycol, dipropylene glycol DPG, a BYK330 flatting agent and hydroxyethyl acrylate into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink with alcohol resistance suitable for ink-jet printing.
Example 3
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (black), 15% of polymer latex emulsion, 0.5% of hydroxypropyl methacrylate, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex is firstly used for encapsulating pigment particles, and the polymer latex emulsion and the pigment particles are mixed under the mechanical action of ball milling, dispersion and the like, so that the operation has the advantages and technical schemes that the polymer latex is used for completely or uniformly encapsulating the pigment particles is well known in the industry (particularly in the field of ink-jet printing).
(2) Adding water, propylene glycol, dipropylene glycol DPG and a BYK330 flatting agent into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing;
(3) and (3) adding hydroxypropyl methacrylate into the aqueous ink obtained in the step (2) to obtain the aqueous ink with alcohol resistance suitable for ink-jet printing.
Example 4
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (black), 15% of polymer latex emulsion, 2% of hydroxybutyl acrylate, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex is firstly used for encapsulating pigment particles, and the polymer latex emulsion and the pigment particles are mixed under the mechanical action of ball milling, dispersion and the like, so that the operation has the advantages and technical schemes that the polymer latex is used for completely or uniformly encapsulating the pigment particles is well known in the industry (particularly in the field of ink-jet printing).
(2) Adding water, propylene glycol, dipropylene glycol DPG, a BYK330 flatting agent and hydroxybutyl acrylate into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink with alcohol resistance suitable for ink-jet printing.
Example 5
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (red), 15% of polymer latex emulsion, 0.2% of hydroxybutyl methacrylate, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex encapsulation of the pigment particles can be accomplished by in situ polymerization, which is well known in the art (particularly in the field of ink jet printing) to achieve complete or uniform encapsulation of the pigment particles by the polymer latex.
(2) Adding water, propylene glycol, dipropylene glycol DPG and a BYK330 flatting agent into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing;
(3) and (3) adding hydroxybutyl methacrylate into the aqueous ink obtained in the step (2) to obtain the aqueous ink with alcohol resistance suitable for ink-jet printing.
Example 6
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (red), 25% of polymer latex emulsion, 5% of hydroxyethyl methacrylate, 11% of propylene glycol, 3% of dipropylene glycol DPG6%, 3% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex encapsulation of the pigment particles can be accomplished by in situ polymerization, which is well known in the art (particularly in the field of ink jet printing) to achieve complete or uniform encapsulation of the pigment particles by the polymer latex.
(2) Adding water, propylene glycol, dipropylene glycol DPG, a BYK330 flatting agent and hydroxyethyl methacrylate into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink with alcohol resistance suitable for ink-jet printing.
Example 7
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (red), 30% of polymer latex emulsion, 5% of hydroxybutyl acrylate, 5% of hydroxyethyl acrylate, 11% of propylene glycol, 7% of dipropylene glycol DPG, 3% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex is firstly used for encapsulating pigment particles, and the polymer latex emulsion and the pigment particles are mixed under the mechanical action of ball milling, dispersion and the like, so that the operation has the advantages and technical schemes that the polymer latex is used for completely or uniformly encapsulating the pigment particles is well known in the industry (particularly in the field of ink-jet printing).
(2) Adding water, propylene glycol, dipropylene glycol DPG and a BYK330 flatting agent into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing;
(3) and (3) adding hydroxybutyl acrylate into the aqueous ink obtained in the step (2) to obtain the aqueous ink with alcohol resistance suitable for ink-jet printing.
Example 8
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (red), 40% of polymer latex emulsion, 10% of hydroxyethyl acrylate, 4% of hydroxypropyl acrylate, 6% of hydroxybutyl methacrylate, 13% of propylene glycol, 8% of dipropylene glycol DPG, 3% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex is firstly used for encapsulating pigment particles, and the polymer latex emulsion and the pigment particles are mixed under the mechanical action of ball milling, dispersion and the like, so that the operation has the advantages and technical schemes that the polymer latex is used for completely or uniformly encapsulating the pigment particles is well known in the industry (particularly in the field of ink-jet printing).
(2) Adding water, propylene glycol, dipropylene glycol DPG, a BYK330 flatting agent and hydroxyethyl acrylate into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink with alcohol resistance suitable for ink-jet printing.
Example 9
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (red), 30% of polymer latex emulsion, 0.06% of hydroxypropyl acrylate, 12% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex encapsulation of the pigment particles can be accomplished by in situ polymerization, which is well known in the art (particularly in the field of ink jet printing) to achieve complete or uniform encapsulation of the pigment particles by the polymer latex.
(2) Adding water, propylene glycol, dipropylene glycol DPG and a BYK330 flatting agent into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing;
(3) and (3) adding hydroxypropyl acrylate into the aqueous ink obtained in the step (2) to obtain the aqueous ink with alcohol resistance suitable for ink-jet printing.
Example 10
An aqueous ink having alcohol resistance comprising: 1.5% of pigment (red), 20% of polymer latex emulsion, 0.01% of hydroxyethyl acrylate, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
The preparation method of the water-based ink with the alcohol resistance comprises the following steps:
(1) the latex is firstly used for encapsulating pigment particles, and the polymer latex emulsion and the pigment particles are mixed under the mechanical action of ball milling, dispersion and the like, so that the operation has the advantages and technical schemes that the polymer latex is used for completely or uniformly encapsulating the pigment particles is well known in the industry (particularly in the field of ink-jet printing).
(2) Adding water, propylene glycol, dipropylene glycol DPG and a BYK330 flatting agent into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink suitable for ink-jet printing;
(3) and (3) adding hydroxyethyl acrylate into the aqueous ink obtained in the step (2) to obtain the aqueous ink with alcohol resistance suitable for ink-jet printing.
Comparative example 1 (without hydroxy acrylate monomer)
An aqueous ink comprising: 1.5% of pigment (black), 15% of polymer latex emulsion, 10% of propylene glycol, 5% of dipropylene glycol DPG, 2% of BYK330 leveling agent and the balance of water.
Comparative example 2
The formulation is the same as example 1, except that in the preparation method: the method comprises the steps of copolymerizing hydroxypropyl acrylate with polymer latex in advance to form hydroxyl-containing acrylate polymer latex emulsion, then completing latex encapsulation of pigment particles as in example 1, adding water, propylene glycol, dipropylene glycol DPG and a BYK330 leveling agent into the latex emulsion encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink.
Results the following Table 1
TABLE 1
Alcohol resistance measurement: and soaking the printed matter in isopropanol at room temperature for 8 hours, wherein the tested image is complete and qualified and is marked as 'V', and the tested image is incomplete and unqualified and is marked as 'X'.
Experiments show that when the frequency of the ink jet printing head is increased to 5kHz, the inks of the samples of examples 1-10 and comparative example 1 can be normally ejected, while the ink of comparative example 2 cannot be continuously ejected when the nozzle prints at high frequency due to high viscosity, and printing fails.
Comparative example 1 the alcohol resistance of examples 1-10 according to the present invention could not be achieved without the process according to the present invention.
In conclusion, the aqueous ink with alcohol resistance provided by the invention solves the problem of insufficient alcohol solvent resistance of the aqueous ink, and has good high-speed printing (5 kHz) performance.
The invention is characterized in that the hydroxyl acrylate monomer is added into the water-based latex ink composition, thereby effectively improving the alcohol tolerance of the printed matter and expanding the application range. The method is not limited to the water-based ink-jet ink, and can effectively improve the alcohol tolerance when being used for water-based ink, paint and the like of a latex system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (9)
1. An aqueous ink having alcohol resistance, characterized in that: the method comprises the following steps: water, polymer latex emulsion, hydroxyl acrylate monomer, functional assistant and pigment added according to the color requirement of the ink.
2. The aqueous ink having alcohol resistance according to claim 1, wherein: the hydroxyl acrylate monomer is at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate and hydroxybutyl methacrylate.
3. The aqueous ink having alcohol resistance according to claim 1, wherein: the weight of the hydroxyl acrylate monomer accounts for more than 0% and less than or equal to 20% of the weight of the water-based ink.
4. The aqueous ink having alcohol resistance according to claim 1 or 3, wherein: the hydroxyl acrylate monomer accounts for more than 0% and less than or equal to 50% of the weight of the polymer latex.
5. The aqueous ink having alcohol resistance according to claim 4, wherein: the hydroxyl acrylate monomer accounts for 0.2-10% of the weight of the water-based ink, and the hydroxyl acrylate monomer accounts for more than 0.5% and less than or equal to 20% of the weight of the polymer latex.
6. The aqueous ink having alcohol resistance according to claim 5, wherein: the hydroxyl acrylate monomer accounts for 0.5-5% of the weight of the water-based ink, and the hydroxyl acrylate monomer accounts for more than 2% and less than or equal to 10% of the weight of the polymer latex.
7. The aqueous ink having alcohol resistance according to claim 1, wherein: the functional assistant is at least one of cosolvent, wetting agent, flatting agent, dispersant and emulsifier.
8. A method of preparing an aqueous ink having alcohol resistance, characterized by: comprising the step of adding a hydroxyacrylic monomer to an aqueous ink containing water and a polymer latex emulsion.
9. A method of preparing an aqueous ink having alcohol resistance, characterized by: comprising the steps of (1) first completing the latex encapsulation of pigment particles; (2) adding water, functional auxiliary agent and hydroxyethyl acrylate into the latex emulsion for encapsulating the pigment particles, uniformly mixing, and filtering to obtain the water-based ink with alcohol resistance suitable for ink-jet printing.
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