CN114773910B - Offset ink with high anti-emulsifying property and preparation method thereof - Google Patents

Offset ink with high anti-emulsifying property and preparation method thereof Download PDF

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CN114773910B
CN114773910B CN202210439025.6A CN202210439025A CN114773910B CN 114773910 B CN114773910 B CN 114773910B CN 202210439025 A CN202210439025 A CN 202210439025A CN 114773910 B CN114773910 B CN 114773910B
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agent
oil
alkyd resin
ink
emulsifying
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CN114773910A (en
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闫继芳
徐天平
杨晓
王银磊
高建
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Beijing Jinyinlian International Supply Chain Management Co ltd
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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
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C09D11/104—Polyesters
    • C09D11/105—Alkyd resins
    • 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
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • 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
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent

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  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The application relates to the technical field of offset printing ink, and particularly discloses offset printing ink with high anti-emulsifying property and a preparation method thereof, wherein the offset printing ink comprises pigment, medium oil alkyd resin, filler, dispersing wetting agent, flatting agent, wear-resisting agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil; the formula is scientific, the proportion is strict, and the prepared offset ink is ensured to have excellent stability, solvent release and printability by controlling the selection of raw materials. The application also provides a preparation method of the offset printing ink with high anti-emulsifying property, which comprises the steps of taking part of medium-oil alkyd resin and solvent oil, adding pigment, stirring to obtain slurry, adding filler, an antiwear agent, a dispersing wetting agent, a leveling agent and an anti-emulsifying agent into the slurry, pre-dispersing, grinding, adding the rest raw materials, uniformly dispersing, filtering, and canning; the method is simple, and the obtained offset printing ink has excellent anti-emulsifying property, so that the generation frequency of ink piling problems in the offset printing process can be effectively reduced.

Description

Offset ink with high anti-emulsifying property and preparation method thereof
Technical Field
The application relates to the technical field of offset printing ink, in particular to offset printing ink with high anti-emulsifying property and a preparation method thereof.
Background
Ink is the most important printing material for information reproduction, and has good printability during printing. The offset printing ink is mainly composed of colored pigment (dye, etc.), binder, filler, auxiliary agent, etc., which are mixed and stirred according to a certain proportion according to the printing requirement during the preparation process, and the offset printing ink is prepared by a rolling and inking process. In recent years, with the development of the Chinese printing industry, the development pace of the domestic ink industry is also accelerated, and the quality requirements on printed matters and ink are also higher.
The ink emulsification is that the ink and the fountain solution are dispersed into fine particles under the pressure of printing pressure, and the fine particles are dissolved and mixed into emulsion according to a certain proportion, and the emulsion is kept relatively stable, so that the layout can be ensured to obtain enough milky ink. When offset printing is performed, the ink is contacted with a fountain solution to absorb moisture, so that the fluidity and the transferability of the ink are increased, but excessive absorption of moisture causes excessive emulsification of the ink. The hydrophilicity of the ink is a direct cause of excessive emulsification of the ink, and pigments, resins and fillers in the ink have better hydrophilicity, especially the red pigment has strong hydrophilicity, so that the phenomena of piling ink and the like in printing are easy to occur frequently.
Excessive emulsification of the ink can cause the problems of volume increase, color fade, viscosity reduction, saturation reduction, affinity reduction, adhesion reduction and the like of the ink, thereby causing printing phenomena such as ink piling and the like of the blanket; and once the ink is excessively emulsified, the ink can only be replaced by new ink, and the ink waste is very easy to cause.
Disclosure of Invention
In order to effectively avoid the problem of excessive emulsification of the offset ink in the offset printing process, the application provides the offset ink with high anti-emulsification performance and a preparation method thereof.
In a first aspect, the present application provides an offset ink with high anti-emulsifying performance, which adopts the following technical scheme:
an offset ink with high anti-emulsifying property comprises the following raw materials in percentage by weight: 18-22% of pigment, 4-8% of medium oil alkyd resin, 3-7% of filler, 0.8-1.5% of dispersing wetting agent, 0.8-1.5% of leveling agent, 0.5-1% of wear-resistant agent, 0.1-0.3% of anti-emulsifying agent, 0.5-1% of drying agent, 0.05-0.12% of antioxidant and the balance solvent oil;
the solvent oil is prepared by compounding colloid oil, resin oil, mineral oil and vegetable oil according to the mass ratio of 62.5:100:7.5:1.
Preferably, the offset ink with high anti-emulsifying property comprises the following raw materials in percentage by weight: 19-21% of pigment, 5-7% of medium oil alkyd resin, 4-6% of filler, 1-1.4% of dispersing wetting agent, 1-1.4% of leveling agent, 0.6-0.9% of wear-resistant agent, 0.15-0.25% of anti-emulsifying agent, 0.6-0.8% of drying agent, 0.08-0.11% of antioxidant and the balance of solvent oil.
Preferably, the offset ink with high anti-emulsifying property comprises the following raw materials in percentage by weight: 20% of pigment, 5% of medium oil alkyd resin, 5% of filler, 1% of dispersing wetting agent, 1% of leveling agent, 0.6% of wear-resistant agent, 0.2% of anti-emulsifying agent, 0.7% of drying agent, 0.1% of antioxidant and the balance of solvent oil.
By adopting the technical scheme, the colloid oil, the resin oil, the mineral oil and the vegetable oil are compounded to be used as the solvent oil of the offset printing ink, and the obtained solvent oil has excellent dispersing, dissolving, diluting and other functions, has good compatibility, can effectively disperse other raw materials in the formula of the offset printing ink, and ensures that the offset printing ink finally prepared has excellent fluidity, transmissibility and transferability; the offset ink has the advantages of simple raw material selection, scientific formula, strict proportion, good viscosity, excellent anti-emulsifying property and excellent stability, solvent release and printability by controlling the raw material selection.
Preferably, the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin in a mass ratio of 4-7:1.
By adopting the technical scheme, the medium oil alkyd resin has good dryness, and the addition of the medium oil alkyd resin can improve the glossiness and weather resistance of the offset ink; the inventor discovers that the isophthalic alkyd resin and the phthalic alkyd resin are compounded to be added as medium-oil alkyd resin, so that the wettability and the water resistance of the finally prepared offset ink can be obviously improved besides the performances, and the compatibility of the compounded medium-oil alkyd resin and other raw materials of the formula is better.
Preferably, the filler is at least one of nano calcium carbonate, fumed silica or superfine talcum powder.
Preferably, the dispersing wetting agent is at least one of HX-5030, HX-5042 and HX-5041.
Preferably, the leveling agent is at least one of DKX leveling agent, TEGO432 leveling agent and TEGO450 leveling agent.
Preferably, the wear-resistant agent is a compound of polyethylene wax and polytetrafluoroethylene wax in a mass ratio of 3-8:1.
By adopting the technical scheme, the polyethylene wax and the polytetrafluoroethylene wax are compounded for adding the offset printing ink, so that the viscosity, the lubricity and the fluidity of the offset printing ink can be effectively improved, the wear resistance, the corrosion resistance, the oxidation resistance and the like of the offset printing ink are improved, the frequency of occurrence of ink piling problems in the offset printing process can be effectively reduced, and the obtained offset printing ink is excellent in printability.
Preferably, the anti-emulsifying agent is prepared by the following method: grinding propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding, mixing uniformly, heating to 75-88 ℃, carrying out heat preservation for 1-4h, and finishing heat preservation to obtain the required anti-emulsifying agent; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 8-12:5-7:1-3:1-2.
By adopting the technical scheme, the anti-emulsifying agent is prepared by mixing propylene oxide, polyethylene glycol, citric acid and 3-glycidoxypropyl triethoxysilane for reaction, and the prepared anti-emulsifying agent has excellent anti-emulsifying performance, can change the interfacial tension of oil/water, and thus realizes the function of rapid water diversion.
Preferably, the drying agent is at least one of cobalt iso-octoate, manganese iso-octoate and zirconium iso-octoate.
Preferably, the antioxidant is at least one of butanone oxime, butyraldehyde oxime and methyl ethyl ketone oxime.
Preferably, the gum oil is 584-1 gum oil; the resin oil is 218 resin oil; the mineral oil is kerosene; the vegetable oil is linseed oil.
By adopting the technical scheme, the inventor finds that under the condition that the preferable ratio of the colloid oil to the resin oil to the mineral oil to the vegetable oil is 62.5:100:7.5:1, 584-1 colloid oil is used as the colloid oil, 218 resin oil is used as the resin oil, kerosene is used as the mineral oil, and linseed oil is used as the vegetable oil, the comprehensive performance of the solvent oil obtained by compounding is optimal, and the final offset ink has the best fluidity, transmissibility and transferability.
In a second aspect, the present application provides a method for preparing an offset ink with high anti-emulsifying performance, which adopts the following technical scheme:
the preparation method of the offset printing ink with high anti-emulsifying property comprises the steps of mixing pigment, medium-oil alkyd resin, filler, dispersing wetting agent, flatting agent, wear-resisting agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage.
Preferably, the preparation method of the offset ink with high anti-emulsifying property specifically comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 1/2 mass of medium-oil alkyd resin and 3/4 mass of solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, heating to 115-125 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding the filler, the wear-resisting agent, the dispersing wetting agent, the leveling agent and the anti-emulsifying agent into the slurry obtained in the step S2, stirring until the surface of the slurry is free of dry powder, and continuing to accelerate stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, and grinding and dispersing the slurry by the three-roller machine until the particle size of the slurry is smaller than 7 mu m to obtain base ink;
and S5, adding medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
Preferably, the stirring rotation speed before acceleration in the step S3 is 30-120r/min, and the stirring rotation speed after acceleration is 300-800r/min.
Preferably, the grinding temperature in the step S4 is 40-80 ℃, and the grinding pressure is 10-50pa/cm 2 。
According to the technical scheme, in the preparation process, solvent oil and medium oil alkyd resin are divided into two parts, one part of the solvent oil and medium oil alkyd resin is firstly taken to disperse pigment, then filler, an antiwear agent, a dispersing wetting agent, a leveling agent and an anti-emulsifying agent are sequentially added to disperse, the pre-dispersed slurry is ground, and then the rest raw materials are added to stir and disperse uniformly, so that the required offset printing ink is prepared; in the preparation process, the water evaporation and phase change are realized by controlling the temperature rise in the step S2 under the condition of guaranteeing the stability of the mixing performance of the raw materials; by controlling the stirring speed, the fully wetting and dispersing of additives such as filler, wear-resisting agent and the like in the solvent oil are realized; by controlling the grinding parameters, the prepared offset ink is ensured to have low fineness, good viscosity, excellent emulsification resistance and the like; the preparation method is simple, the preparation conditions are mild, the obtained offset ink has excellent anti-emulsifying property, the generation frequency of ink piling problems in the offset printing process can be effectively reduced, and the printability of the obtained offset ink is excellent.
In summary, the present application has the following beneficial effects:
the preparation method adopts compound solvent oil with good dispersion, dissolution, dilution and compatibility as a main material, and prepares the required offset printing ink through adding pigment, filler and other auxiliary agents, and dispersing and grinding; by controlling the selection and the proportion of the raw materials, the viscosity, the wettability and the anti-emulsifying property of the prepared offset ink are ensured to be excellent; the fineness of the prepared offset printing ink is ensured to be small, the dispersion is uniform, and the stability is good by controlling the mixing mode and the processing parameters of raw materials in the preparation process; the offset printing ink prepared by the method has excellent emulsification resistance and printability, and can effectively avoid the problem of excessive emulsification of the offset printing ink in the offset printing process, thereby reducing the frequency of occurrence of the problems of piling and the like.
Detailed Description
The present application is described in further detail below with reference to examples.
Preparation examples 1-5 provide methods for preparing the anti-emulsifying agent.
Preparation example 1
The anti-emulsifying agent is prepared by the following method: grinding and mixing propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding and mixing uniformly, heating to 75 ℃, preserving heat for 4 hours, and obtaining the required anti-emulsifying agent after the heat preservation is finished; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 8:5:1:1.
Preparation example 2
The anti-emulsifying agent is prepared by the following method: grinding and mixing propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding and mixing uniformly, heating to 78 ℃, preserving heat for 3.5h, and finishing heat preservation to obtain the required anti-emulsifying agent; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 9:5.5:1.5:1.2.
Preparation example 3
The anti-emulsifying agent is prepared by the following method: grinding and mixing propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding and mixing uniformly, heating to 82 ℃, preserving heat for 3 hours, and obtaining the required anti-emulsifying agent after the heat preservation is finished; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 10:6:2:1.5.
Preparation example 4
The anti-emulsifying agent is prepared by the following method: grinding and mixing propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding and mixing uniformly, heating to 85 ℃, preserving heat for 2 hours, and obtaining the required anti-emulsifying agent after the heat preservation is finished; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 11:6.5:2.5:1.8.
Preparation example 5
The anti-emulsifying agent is prepared by the following method: grinding and mixing propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding and mixing uniformly, heating to 88 ℃, preserving heat for 1h, and obtaining the required anti-emulsifying agent after the heat preservation is finished; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 12:7:3:2.
Examples 1-5 provide a high anti-emulsifying property offset ink and a preparation method thereof.
Example 1
An offset ink with high anti-emulsifying property comprises the following raw materials: 18Kg of pigment, 4Kg of medium oil alkyd resin, 3Kg of filler, 0.8Kg of dispersing wetting agent, 0.8Kg of flatting agent, 0.5Kg of wear-resistant agent, 0.1Kg of anti-emulsifying agent, 0.5Kg of drying agent, 0.05Kg of antioxidant and 72.25Kg of solvent oil;
wherein the solvent oil is compounded by 584-1 colloid oil, 218 resin oil, paraffin oil and soybean oil according to the mass ratio of 62.5:100:7.5:1;
the pigment is Lixol red pigment;
the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin according to the mass ratio of 4:1;
the filler is nano calcium carbonate;
the dispersing wetting agent is HX-5030;
the leveling agent is DKX450 leveling agent;
the antiwear agent is a compound of polyethylene wax and polytetrafluoroethylene wax with the mass ratio of 3:1;
the anti-emulsifying agent is the anti-emulsifying agent prepared in preparation example 1;
the drying agent is cobalt iso-octoate;
the antioxidant is butanone oxime;
the preparation method of the offset printing ink with high anti-emulsifying property comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 2Kg of medium-oil alkyd resin and 50Kg of solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, then heating to 115 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding the filler, the wear-resisting agent, the dispersing wetting agent, the leveling agent and the anti-emulsifying agent into the slurry in the step S2, stirring at a rotating speed of 30r/min until the surface of the slurry is free of dry powder, and continuously accelerating until the stirring rotating speed is 300r/min, stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, controlling the grinding temperature to be 40 ℃ and the grinding pressure to be 10pa/cm 2 Grinding and dispersing the slurry to the particle size of 6 mu m by a three-roller machine to obtain base ink;
and S5, adding the residual medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
Example 2
An offset ink with high anti-emulsifying property comprises the following raw materials: 19Kg of pigment, 5Kg of medium oil alkyd resin, 4Kg of filler, 1Kg of dispersing wetting agent, 1Kg of flatting agent, 0.6Kg of wear-resistant agent, 0.15Kg of anti-emulsifying agent, 0.6Kg of drying agent, 0.08Kg of antioxidant and 68.57Kg of solvent oil;
wherein the solvent oil is compounded by 584-1 colloid oil, 289 resin oil, paraffin oil and linseed oil according to the mass ratio of 62.5:100:7.5:1;
the pigment is Lixol red pigment;
the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin in a mass ratio of 5:1;
the filler is fumed silica;
the dispersing wetting agent is HX-5042;
the leveling agent is TEGO432 leveling agent;
the antiwear agent is a compound of polyethylene wax and polytetrafluoroethylene wax with the mass ratio of 4:1;
the anti-emulsifying agent is the anti-emulsifying agent prepared in preparation example 2;
the drying agent is manganese iso-octoate;
the antioxidant is butyraldehyde oxime;
the preparation method of the offset printing ink with high anti-emulsifying property comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 3Kg of medium-oil alkyd resin and 48Kg of solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, heating to 118 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding a filler, an antiwear agent, a dispersing wetting agent, a leveling agent and an anti-emulsifying agent into the slurry obtained in the step S2, stirring at a rotating speed of 50r/min until the surface of the slurry is free of dry powder, and continuously accelerating until the stirring rotating speed is 400r/min, stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained by the pre-dispersion treatment in the step S3Transferring to a three-roll mill, controlling the grinding temperature to 50 ℃ and the grinding pressure to 20pa/cm 2 Grinding and dispersing the slurry to the grain size of 5 mu m by a three-roller machine to obtain base ink;
and S5, adding the residual medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
Example 3
An offset ink with high anti-emulsifying property comprises the following raw materials in percentage by weight: 20Kg of pigment, 5Kg of medium oil alkyd resin, 5Kg of filler, 1Kg of dispersing wetting agent, 1Kg of flatting agent, 0.6Kg of wear-resistant agent, 0.2Kg of anti-emulsifying agent, 0.7Kg of drying agent, 0.1Kg of antioxidant and 66.4Kg of solvent oil;
wherein the solvent oil is compounded by 584-1 colloid oil, 218 resin oil, kerosene and linseed oil according to the mass ratio of 62.5:100:7.5:1;
the pigment is Lixol red pigment;
the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin according to the mass ratio of 5.5:1;
the filler is a mixture of nano calcium carbonate and aerosil with the mass ratio of 2:1;
the dispersing wetting agent is HX-5041;
the leveling agent is TEGO450 leveling agent;
the antiwear agent is a compound of polyethylene wax and polytetrafluoroethylene wax with the mass ratio of 5:1;
the anti-emulsifying agent is the anti-emulsifying agent prepared in preparation example 3;
the drying agent is zirconium isooctanoate;
the antioxidant is methyl ethyl ketoxime;
the preparation method of the offset printing ink with high anti-emulsifying property comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 3Kg of medium-oil alkyd resin and 50Kg of solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, then heating to 120 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding the filler, the wear-resisting agent, the dispersing wetting agent, the leveling agent and the anti-emulsifying agent into the slurry in the step S2, stirring at a rotating speed of 70r/min until the surface of the slurry is free of dry powder, and continuously accelerating until the stirring rotating speed is 500r/min, stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, controlling the grinding temperature to be 60 ℃ and the grinding pressure to be 30pa/cm 2 Grinding and dispersing the slurry to the particle size of 4 mu m by a three-roller machine to obtain base ink;
and S5, adding the residual medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
Example 4
An offset ink with high anti-emulsifying property comprises the following raw materials in percentage by weight: 21Kg of pigment, 7Kg of medium oil alkyd resin, 6Kg of filler, 1.4Kg of dispersing wetting agent, 1.4Kg of flatting agent, 0.9Kg of wear-resistant agent, 0.25Kg of anti-emulsifying agent, 0.8Kg of drying agent, 0.11Kg of antioxidant and 61.14Kg of solvent oil;
wherein the solvent oil is prepared by compounding 588-1 colloid oil, 218 resin oil, kerosene and soybean oil according to the mass ratio of 62.5:100:7.5:1;
the pigment is Lixol red pigment;
the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin in a mass ratio of 4-7:1;
the filler is superfine talcum powder;
the dispersing wetting agent is HX-5041;
the leveling agent is DKX450 leveling agent;
the antiwear agent is a compound of polyethylene wax and polytetrafluoroethylene wax with the mass ratio of 6:1;
the anti-emulsifying agent is the anti-emulsifying agent prepared in preparation example 4;
the drying agent is zirconium isooctanoate;
the antioxidant is methyl ethyl ketoxime;
the preparation method of the offset printing ink with high anti-emulsifying property comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 4Kg medium-oil alkyd resin and 45Kg solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, then heating to 122 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding a filler, an antiwear agent, a dispersing wetting agent, a leveling agent and an anti-emulsifying agent into the slurry in the step S2, stirring at a rotating speed of 100r/min until the surface of the slurry is free of dry powder, and continuously accelerating until the stirring rotating speed is 700r/min, stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, controlling the grinding temperature to be 70 ℃ and the grinding pressure to be 40pa/cm 2 Grinding and dispersing the slurry to the particle size of 6 mu m by a three-roller machine to obtain base ink;
and S5, adding the residual medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
Example 5
An offset ink with high anti-emulsifying property comprises the following raw materials in percentage by weight: 22Kg of pigment, 8Kg of medium oil alkyd resin, 7Kg of filler, 1.5Kg of dispersing wetting agent, 1.5Kg of flatting agent, 1Kg of wear-resistant agent, 0.3Kg of anti-emulsifying agent, 1Kg of drying agent, 0.12Kg of antioxidant and 57.58Kg of solvent oil;
wherein the solvent oil is prepared by compounding 588-1 colloid oil, 289 resin oil, kerosene and linseed oil according to the mass ratio of 62.5:100:7.5:1;
the pigment is Lixol red pigment;
the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin according to the mass ratio of 7:1;
the filler is fumed silica;
the dispersing wetting agent is HX-5042;
the leveling agent is TEGO432 leveling agent;
the antiwear agent is a compound of polyethylene wax and polytetrafluoroethylene wax with the mass ratio of 8:1;
the anti-emulsifying agent is the anti-emulsifying agent prepared in preparation example 5;
the drying agent is cobalt iso-octoate;
the antioxidant is butanone oxime;
the preparation method of the offset printing ink with high anti-emulsifying property comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 4Kg medium-oil alkyd resin and 45Kg solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, then heating to 125 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding the filler, the wear-resisting agent, the dispersing wetting agent, the leveling agent and the anti-emulsifying agent into the slurry in the step S2, stirring at a rotating speed of 120r/min until the surface of the slurry is free of dry powder, and continuously accelerating until the stirring rotating speed is 800r/min, stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, controlling the grinding temperature to be 80 ℃ and the grinding pressure to be 50pa/cm 2 Grinding and dispersing the slurry to the grain size of 5 mu m by a three-roller machine to obtain base ink;
and S5, adding the residual medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
Example 6
The difference from example 3 is only that: the solvent oil is compounded by 584-1 colloid oil, 218 resin oil, paraffin oil and soybean oil according to the mass ratio of 62.5:100:7.5:1.
Example 7
The difference from example 3 is only that: the solvent oil is prepared by compounding 584-1 colloid oil, 289 resin oil, paraffin oil and linseed oil according to the mass ratio of 62.5:100:7.5:1.
Example 8
The difference from example 3 is only that: the solvent oil is prepared by compounding 588-1 colloid oil, 218 resin oil, kerosene and soybean oil according to the mass ratio of 62.5:100:7.5:1.
Example 9
The difference from example 3 is only that: the solvent oil is prepared by compounding 588-1 colloid oil, 289 resin oil, kerosene and linseed oil according to the mass ratio of 62.5:100:7.5:1.
Example 10
The difference from example 3 is only that: the filler is nano calcium carbonate.
Example 11
The difference from example 3 is only that: in the step S2 of the preparation method, 2.5Kg medium-oil alkyd resin and 49.8Kg solvent oil are added into a stirrer, pigments are added and stirred to an oil-water separation state, then the temperature is raised to 122 ℃, and the mixture is stirred until water volatilizes, so that slurry is obtained.
To verify the performance of the high anti-emulsifying property flexographic inks provided herein, applicants set comparative examples 1-7, wherein:
comparative example 1
The difference from example 3 is only that: the solvent oil is prepared by compounding 584-1 colloid oil, 218 resin oil and kerosene according to the mass ratio of 62.5:100:7.5.
Comparative example 2
The difference from example 3 is only that: the solvent oil is compounded by 584-1 colloid oil, 218 resin oil and linseed oil according to the mass ratio of 62.5:100:1.
Comparative example 3
The difference from example 3 is only that: the medium oil alkyd resin is isophthalic alkyd resin.
Comparative example 4
The difference from example 3 is only that: the medium oil alkyd resin is phthalic acid alkyd resin.
Comparative example 5
The difference from example 3 is that: the wear-resistant agent is polyethylene wax.
Comparative example 6
The difference from example 3 is that: the wear-resistant agent is polytetrafluoroethylene wax.
Comparative example 7
The difference from example 3 is that: the anti-emulsifying agent is anti-emulsifying agent D114.
Comparative example 8
The difference with example 3 is that the preparation method of the offset ink with high anti-emulsifying property comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding medium-oil alkyd resin and solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, heating to 120 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding the filler, the wear-resisting agent, the dispersing wetting agent, the leveling agent and the anti-emulsifying agent into the slurry in the step S2, stirring at a rotating speed of 70r/min until the surface of the slurry is free of dry powder, and continuously accelerating until the stirring rotating speed is 500r/min, stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, controlling the grinding temperature to be 60 ℃ and the grinding pressure to be 30pa/cm 2 Grinding and dispersing the slurry to the particle size of 4 mu m by a three-roller machine to obtain base ink;
s5, adding a drying agent and an antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering, and canning to obtain the required offset printing ink.
The properties of the high-demulsification performance flexographic inks prepared in examples 1 to 11 and comparative examples 1 to 8, respectively, were examined to give the results shown in Table 1 below:
wherein, according to the national standard: GB/T1724-2019 detects fineness of offset ink;
according to the national standard: GB/T14624.5-1993 detects offset ink viscosity;
viscosity: testing with a rotational viscometer;
according to the national standard: GB/T13217.4-2020 detects the fluidity of offset ink;
detecting the tinting strength of the offset printing ink according to the national standard GB/T14624.2-2008;
emulsification rate: detecting by using an emulsion rate tester, adding 50g of offset ink sample into a testing cup of the emulsion rate tester, adding 50g of prepared fountain solution, stirring at the speed of 200r/min for 10min, removing excessive free water, and calculating the mass percentage of water absorbed by the ink.
Table 1:
Figure 527630DEST_PATH_IMAGE002
as can be seen from the data shown in table 1: the high-demulsification-performance offset ink prepared in examples 1 to 11 of the application has low fineness, proper viscosity and viscosity, good tinting strength, excellent fluidity and demulsification, and the combination property of the high-demulsification-performance offset ink prepared in examples 1 to 11 of the application is far better than that of the high-demulsification-performance offset ink prepared in comparative examples 1 to 8.
From example 3 and examples 6 to 9, it is clear that: under the condition that the preferable proportion of the colloid oil, the resin oil, the mineral oil and the vegetable oil is 62.5:100:7.5:1, 584-1 colloid oil is selected as the colloid oil, 218 resin oil is selected as the resin oil, kerosene is selected as the mineral oil, and linseed oil is selected as the vegetable oil, the comprehensive performance of the solvent oil obtained by compounding is optimal, and the final offset ink has the best fluidity, transmissibility and transferability.
As can be seen from examples 3 and 10, the combination property of the offset ink prepared by using the composite filler nano calcium carbonate and the fumed silica is improved compared with the offset ink prepared by using the filler nano calcium carbonate alone.
From example 3 and example 11, it can be seen that: in the application, the offset ink is prepared by adding the medium-oil alkyd resin and the solvent oil in two parts, and the viscosity, the fluidity, the emulsifying property and other performances of the prepared offset ink can be effectively adjusted by controlling the proportion of the medium-oil alkyd resin and the solvent oil added in different preparation procedures.
From example 3 and comparative examples 1 to 2, it can be seen that: the solvent oil compound has excellent dispersing, dissolving, diluting and other functions, has good compatibility, can effectively disperse other raw materials in the formula, and ensures that the finally prepared offset printing ink has excellent fluidity, transmissibility and transferability.
From example 3 and comparative examples 3 to 4, it is understood that: the isophthalic acid alkyd resin and the phthalic acid alkyd resin are compounded to be added as medium-oil alkyd resin, so that the comprehensive performance of the finally prepared offset ink is better than that of independently adding the isophthalic acid alkyd resin or the phthalic acid alkyd resin;
as can be seen from example 3 and comparative examples 5 and 6: the polyethylene wax and the polytetrafluoroethylene wax are compounded and used for adding the offset ink, so that the viscosity, the lubricity and the fluidity of the offset ink can be effectively improved, and the comprehensive performance of the offset ink is improved.
From example 3 and comparative example 7, it can be seen that: the emulsion inhibitor prepared by the method has excellent anti-emulsifying performance, and can change the interfacial tension of oil/water, thereby realizing the function of rapid water diversion; compared with the anti-emulsifying agent D114, the anti-emulsifying agent has better anti-emulsifying performance.
From example 3 and comparative example 8, it can be seen that: the offset ink is prepared by adding the medium-oil alkyd resin and the solvent oil in two parts, and the finally prepared offset ink has better fluidity, transmissibility, transferability and emulsifying property compared with the one-time addition in the comparative example 8.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims (6)

1. The offset ink with high anti-emulsifying property is characterized by comprising the following raw materials in percentage by weight: 18-22% of pigment, 4-8% of medium oil alkyd resin, 3-7% of filler, 0.8-1.5% of dispersing wetting agent, 0.8-1.5% of leveling agent, 0.5-1% of wear-resistant agent, 0.1-0.3% of anti-emulsifying agent, 0.5-1% of drying agent, 0.05-0.12% of antioxidant and the balance solvent oil;
the medium oil alkyd resin is prepared by compounding isophthalic alkyd resin and phthalic alkyd resin in a mass ratio of 4-7:1;
the wear-resistant agent is a compound of polyethylene wax and polytetrafluoroethylene wax with the mass ratio of 3-8:1;
the anti-emulsifying agent is prepared by the following method: grinding propylene oxide and polyethylene glycol, adding citric acid and 3-glycidoxypropyl triethoxysilane, continuously grinding, mixing uniformly, heating to 75-88 ℃, carrying out heat preservation for 1-4h, and finishing heat preservation to obtain the required anti-emulsifying agent; wherein the mass ratio of the propylene oxide to the polyethylene glycol to the citric acid to the 3-glycidoxypropyl triethoxysilane is 8-12:5-7:1-3:1-2;
the solvent oil is prepared by compounding 584-1 colloid oil, 218 resin oil, kerosene and linseed oil according to the mass ratio of 62.5:100:7.5:1.
2. The high-demulsification-performance offset ink as claimed in claim 1, comprising the following raw materials in weight percentage: 19-21% of pigment, 5-7% of medium oil alkyd resin, 4-6% of filler, 1-1.4% of dispersing wetting agent, 1-1.4% of leveling agent, 0.6-0.9% of wear-resistant agent, 0.15-0.25% of anti-emulsifying agent, 0.6-0.8% of drying agent, 0.08-0.11% of antioxidant and the balance of solvent oil.
3. The high-demulsification-performance offset ink as claimed in claim 1, comprising the following raw materials in weight percentage: 20% of pigment, 5% of medium oil alkyd resin, 5% of filler, 1% of dispersing wetting agent, 1% of leveling agent, 0.6% of wear-resistant agent, 0.2% of anti-emulsifying agent, 0.7% of drying agent, 0.1% of antioxidant and the balance of solvent oil.
4. A method for preparing the offset printing ink with high anti-emulsifying property according to any one of claims 1 to 3, which is characterized in that pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, anti-wear agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil are mixed according to weight percentage.
5. The method for preparing the offset ink with high anti-emulsifying property according to claim 4, which comprises the following steps:
s1, weighing pigment, medium oil alkyd resin, filler, dispersing wetting agent, leveling agent, wear-resistant agent, anti-emulsifying agent, drying agent, antioxidant and solvent oil according to weight percentage for later use;
s2, adding 1/2 mass of medium-oil alkyd resin and 3/4 mass of solvent oil into a stirrer, adding pigment, stirring to an oil-water separation state, heating to 115-125 ℃, and stirring until water volatilizes to obtain slurry;
s3, sequentially adding the filler, the wear-resisting agent, the dispersing wetting agent, the leveling agent and the anti-emulsifying agent into the slurry obtained in the step S2, stirring until the surface of the slurry is free of dry powder, and continuing to accelerate stirring and dispersing until the dry powder is fully wetted;
s4, transferring the slurry obtained through the pre-dispersion treatment in the step S3 to a three-roller machine, and grinding and dispersing the slurry by the three-roller machine until the particle size of the slurry is smaller than 7 mu m to obtain base ink;
and S5, adding medium-oil alkyd resin, solvent oil, drying agent and antioxidant into the base ink obtained in the step S4, stirring and dispersing uniformly, filtering and canning to obtain the required offset printing ink.
6. The method for preparing high-demulsification-performance offset ink according to claim 5, wherein the stirring rotation speed before acceleration in the step S3 is 30-120r/min, and the stirring rotation speed after acceleration is 300-800r/min.
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