CN113625535A - Ink powder capable of printing durable handwriting and preparation method thereof - Google Patents

Abstract

The invention discloses a toner capable of printing durable handwriting, which comprises the following specific components: the ink powder comprises resin, pigment, antioxidant, interfacial compatilizer, surface modifier, light stabilizer, charge regulator, wax and surface additive, wherein the ink powder comprises the following components in parts by weight: 70-95 parts of resin, 1-10 parts of pigment, 0.1-5 parts of antioxidant, 0.1-5 parts of interfacial compatilizer, 0.1-5 parts of surface modifier, 0.1-5 parts of light stabilizer, 0.5-5 parts of charge regulator, 1-10 parts of wax and 1-5 parts of surface additive. The invention also discloses a preparation method of the ink powder capable of printing durable writings. The invention can not only effectively reduce the thermal oxidation and photo-oxidation reaction speed of the color toner, improve the heat resistance and the light resistance of the color toner, delay the degradation and the aging process of the color toner, but also improve the interface compatibility between the color toner and paper fibers, improve the bonding firmness of the color toner and the paper and delay the falling off of the color toner of printed writing.

Description

Ink powder capable of printing durable handwriting and preparation method thereof

Technical Field

The invention relates to the field of production and preparation of ink powder for laser printers and digital copiers, in particular to ink powder capable of printing durable handwriting and a preparation method thereof.

Background

In image forming apparatuses such as electrophotographic apparatuses, electrostatic recording apparatuses, and electrostatic printing apparatuses, an electrostatic latent image formed on a photoreceptor is developed with a toner to form a desired image, and with the development of high-speed and energy-saving photocopiers and printers, the toner is required to have higher performance, be melted at a lower temperature, and be rapidly solidified after being melted. However, after the existing printing toner is fixed, the toner on the existing printing toner is easy to fall off after a period of time, and the stability of the toner cannot be maintained for a long time, so that the printed handwriting cannot be durably stable.

Chinese patent: the polyester resin for printing carbon powder and the preparation method and application (CN108395525B) thereof, the carbon powder prepared by the polyester resin disclosed in the patent scheme can reduce the fixing temperature so as to improve the stability of the carbon powder and keep the stability of the carbon powder printing handwriting. However, in the scheme, the problem of interface compatibility still exists between the resin component of the carbon powder and the fibers of the printing paper, the resin component and the fibers cannot be firmly adhered in a physical adhesion mode, and the carbon powder of the print of the printing product is easy to reduce the physical adhesion force along with the time, so that the carbon powder falls off, the color is faded, and finally the problem that the print is fuzzy and cannot be identified is caused.

Therefore, the carbon powder in the prior art needs to be further perfected and improved in the two directions, one is to improve the heat resistance and light resistance of the resin component in the toner, delay the degradation and aging processes of the resin material and prolong the storage life of the printed product; the second is to improve the interface compatibility between the ink powder component and the paper fiber, and improve the combination firmness of the ink powder component and the paper fiber by utilizing physical adhesion and partial chemical bonding, delay the falling of the ink powder of the printed writing and improve the durability of the printed writing.

Disclosure of Invention

The invention discloses a toner capable of printing durable writings and a preparation method thereof, and mainly aims to overcome the defects and shortcomings in the prior art.

The technical scheme adopted by the invention is as follows:

the ink powder capable of printing durable writing consists of the following specific components: the toner comprises resin, a pigment, an antioxidant, an interfacial compatilizer, a surface modifier, a light stabilizer, a charge regulator, wax and a surface additive, wherein the toner comprises the following components in parts by weight: 70-95 parts of resin, 1-10 parts of pigment, 0.1-5 parts of antioxidant, 0.1-5 parts of interfacial compatilizer, 0.1-5 parts of surface modifier, 0.1-5 parts of light stabilizer, 0.5-5 parts of charge regulator, 1-10 parts of wax and 1-5 parts of surface additive.

Further, the toner is composed of the following components in parts by weight: 70 parts of resin, 5 parts of pigment, 2 parts of antioxidant, 0.1 part of interfacial compatilizer, 0.9 part of surface modifier, 4 parts of light stabilizer, 3 parts of charge regulator, 10 parts of wax and 5 parts of surface additive.

Furthermore, the resin is one or more of a copolymer of a styrene monomer and acrylic ester, a copolymer of a styrene monomer and methacrylic ester, a vinyl polymer and a copolymer thereof, a styrene copolymer, polyvinyl ether, polyvinyl ketone, polyether amine, polyurethane, rubbers, epoxy resin, polyvinyl butyral rosin, modified rosin, phenolic resin and polyester (saturated polyester resin, unsaturated polyester resin and styrene-acrylic-polyester copolymerized resin).

Furthermore, the antioxidant comprises a main antioxidant, an antioxidant compounded by the main antioxidant and the auxiliary antioxidant (the auxiliary antioxidant is not used independently), an organic hindered amine antioxidant and a sulfide antioxidant, wherein the main antioxidant is an organic hindered phenol antioxidant (antioxidant 1010 and antioxidant 1076), and the auxiliary antioxidant is a phosphite antioxidant (antioxidant 168).

Furthermore, the interfacial compatilizer is one or more of maleic anhydride grafted polylactic acid, maleic anhydride grafted polybutylene succinate and maleic anhydride grafted polyhydroxyalkanoate.

Furthermore, the surface modifier is one or more of silane coupling agent (aminosilane coupling agent KH-550, epoxy silane coupling agent KH-560 or azido silane coupling agent S-3046), titanate coupling agent and stearic acid.

Furthermore, the light stabilizer is one or more of hindered amine light stabilizer, ultraviolet absorbent (benzophenone, benzotriazole, salicylate, triazine, substituted acrylonitrile), and light shielding agent (titanium dioxide, zinc oxide, carbon black).

Still further, the charge-modulating agents include an electronegative CCA and an electropositive CCA, wherein the electronegative CCA has: electronegative polymers, metal salicylic acid complexes, monoazo metal complexes or chelates, and organic metal complexes of aromatic hydroxycarboxylic acids or aromatic dicarboxylic acids; positive CCA has: fatty acid metal salts, tributylbenzylammonium-1-hydroxy-4-naphthol sulfonate, tetrabutylammonium tetrafluoroborate, styrene-acrylic acid-methacrylate copolymer resins, and electropositive polymers.

Further, the wax is one or more of hydrocarbon waxes such as polypropylene wax, polyethylene wax, maleic anhydride-modified polyethylene wax, copolyolefin wax, Fischer-Tropsch wax, paraffin wax, oxidized paraffin wax, microcrystalline wax, ester waxes such as behenic acid behenyl ester, stearyl stearate, carnauba wax, montanic acid ester wax, pentaerythritol stearate, and higher fatty acid amide waxes such as oleic acid amide and stearic acid amide.

Still further, the surface additive is one or more of fumed silica, titanium dioxide, metal oxides (alumina, zinc oxide, cerium oxide, etc.), titanates, metal stearates, polymer particles.

Furthermore, the pigment is one or the combination of an organic pigment or an inorganic pigment, and the raw material type of the pigment is not limited and can be freely selected according to the actual requirement.

A preparation method of ink powder capable of printing durable writings comprises the following specific steps:

the method comprises the following steps: premixing, namely uniformly mixing the resin, the antioxidant, the light stabilizer, the charge regulator, the wax and the pigment by a mixer to obtain a premixed mixture;

step two: melt extrusion, namely melting and mixing the premixed mixture obtained in the step one through a mixing roll, extruding, cooling and tabletting to obtain a melt extrusion sheet;

step three: coarse crushing, namely crushing the melt extrusion sheet obtained in the step two by using mechanical crushing equipment to obtain crushed coarse particles, and finishing coarse crushing treatment;

step four: performing jet milling and grading, namely performing jet milling on the coarse particles obtained in the step three through a jet mill, and then grading to obtain an intermediate product;

step five: modification treatment, namely adding an interface compatilizer and a surface modifier into the intermediate product obtained in the step four for reaction treatment to obtain a modified intermediate product;

step six: and (5) post-treatment, namely adding a surface additive into the modified intermediate product obtained in the step five to obtain a finished product of the ink powder, and finishing the preparation of the ink powder.

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the antioxidant and the light stabilizer are added in the formula of the toner, so that the thermal oxidation and photo-oxidation reaction speeds of the color toner can be effectively resisted or reduced, the heat resistance and the light resistance of the color toner are improved, the degradation and aging processes of the color toner can be delayed, the storage life of a printed product is prolonged, and the appearance glossiness and the color reproducibility of a printed writing are improved.

2. According to the invention, the produced intermediate product is modified by adding the interface compatilizer and the surface modifier, so that the interface compatibility between the color toner and paper fibers is improved, the combination firmness of the color toner and the paper is improved through physical adhesion and partial chemical bonding, and the phenomena of falling off of the color toner, adhesion of paper, fading of colors and indistinct handwriting of a printed product are delayed.

Drawings

FIG. 1 is a production flow diagram of the manufacturing method of the present invention.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

Example one

As shown in FIG. 1, the toner capable of printing durable writings comprises the following specific components: the toner comprises resin, a pigment, an antioxidant, an interfacial compatilizer, a surface modifier, a light stabilizer, a charge regulator, wax and a surface additive, wherein the toner comprises the following components in parts by weight:

70 parts of resin, 5 parts of pigment, 2 parts of antioxidant, 0.1 part of interfacial compatilizer, 0.9 part of surface modifier, 4 parts of light stabilizer, 3 parts of charge regulator, 10 parts of wax and 5 parts of surface additive.

Furthermore, the resin is one or more of a copolymer of a styrene monomer and acrylic ester, a copolymer of a styrene monomer and methacrylic ester, a vinyl polymer and a copolymer thereof, a styrene copolymer, polyvinyl ether, polyvinyl ketone, polyether amine, polyurethane, rubbers, epoxy resin, polyvinyl butyral rosin, modified rosin, phenolic resin and polyester (saturated polyester resin, unsaturated polyester resin and styrene-acrylic-polyester copolymerized resin).

Furthermore, the antioxidant comprises a main antioxidant, an antioxidant compounded by the main antioxidant and the auxiliary antioxidant (the auxiliary antioxidant is not used independently), an organic hindered amine antioxidant and a sulfide antioxidant, wherein the main antioxidant is an organic hindered phenol antioxidant (antioxidant 1010 and antioxidant 1076), and the auxiliary antioxidant is a phosphite antioxidant (antioxidant 168).

Furthermore, the interfacial compatilizer is one or more of maleic anhydride grafted polylactic acid, maleic anhydride grafted polybutylene succinate and maleic anhydride grafted polyhydroxyalkanoate.

Furthermore, the surface modifier is one or more of silane coupling agent (aminosilane coupling agent KH-550, epoxy silane coupling agent KH-560 or azido silane coupling agent S-3046), titanate coupling agent and stearic acid.

Furthermore, the light stabilizer is one or more of hindered amine light stabilizer, ultraviolet absorbent (benzophenone, benzotriazole, salicylate, triazine, substituted acrylonitrile), and light shielding agent (titanium dioxide, zinc oxide, carbon black).

Still further, the charge-modulating agents include an electronegative CCA and an electropositive CCA, wherein the electronegative CCA has: electronegative polymers, metal salicylic acid complexes, monoazo metal complexes or chelates, and organic metal complexes of aromatic hydroxycarboxylic acids or aromatic dicarboxylic acids; positive CCA has: fatty acid metal salts, tributylbenzylammonium-1-hydroxy-4-naphthol sulfonate, tetrabutylammonium tetrafluoroborate, styrene-acrylic acid-methacrylate copolymer resins, and electropositive polymers.

Further, the wax is one or more of hydrocarbon waxes such as polypropylene wax, polyethylene wax, maleic anhydride-modified polyethylene wax, copolyolefin wax, Fischer-Tropsch wax, paraffin wax, oxidized paraffin wax, microcrystalline wax, ester waxes such as behenic acid behenyl ester, stearyl stearate, carnauba wax, montanic acid ester wax, pentaerythritol stearate, and higher fatty acid amide waxes such as oleic acid amide and stearic acid amide.

Still further, the surface additive is one or more of fumed silica, titanium dioxide, metal oxides (alumina, zinc oxide, cerium oxide, etc.), titanates, metal stearates, polymer particles.

Furthermore, the pigment is one or the combination of an organic pigment or an inorganic pigment, and the raw material type of the pigment is not limited and can be freely selected according to the actual requirement.

A preparation method of ink powder capable of printing durable writings comprises the following specific steps:

the method comprises the following steps: premixing, namely uniformly mixing the resin, the antioxidant, the light stabilizer, the charge regulator, the wax and the pigment by a mixer to obtain a premixed mixture;

step two: melt extrusion, namely melting and mixing the premixed mixture obtained in the step one through a mixing roll, extruding, cooling and tabletting to obtain a melt extrusion sheet;

step three: coarse crushing, namely crushing the melt extrusion sheet obtained in the step two by using mechanical crushing equipment to obtain crushed coarse particles, and finishing coarse crushing treatment;

step four: performing jet milling and grading, namely performing jet milling on the coarse particles obtained in the step three through a jet mill, and then grading to obtain an intermediate product;

step five: modification treatment, namely adding an interface compatilizer and a surface modifier into the intermediate product obtained in the step four for reaction treatment to obtain a modified intermediate product;

step six: and (5) post-treatment, namely adding a surface additive into the modified intermediate product obtained in the step five to obtain a finished product of the ink powder, and finishing the preparation of the ink powder.

Example two

The difference between this embodiment and the first embodiment is: the toner of the embodiment comprises the following components in parts by weight: 80 parts of resin, 2 parts of pigment, 2 parts of antioxidant, 1 part of interfacial compatilizer, 2 parts of surface modifier, 2 parts of light stabilizer, 3 parts of charge regulator, 5 parts of wax and 3 parts of surface additive. Other preparation methods are the same as the first embodiment, and are not repeated here.

EXAMPLE III

The difference between this embodiment and the first embodiment is: the toner of the embodiment comprises the following components in parts by weight: 75 parts of resin, 3 parts of pigment, 3 parts of antioxidant, 2 parts of interfacial compatilizer, 3 parts of surface modifier, 3 parts of light stabilizer, 3 parts of charge regulator, 5 parts of wax and 3 parts of surface additive. Other preparation methods are the same as the first embodiment, and are not repeated here.

Comparative example:

there is no modification treatment of intermediate products, and no antioxidant and light stabilizer are added to the printing toner.

And (3) performance testing:

the ink powder handwriting is respectively tested under different environmental conditions of dry heat, ultraviolet illumination, water immersion, acid, alkali and the like:

1. three test points are selected from each testable area of the test sample.

2. The initial color difference value DeltaEl is measured by a color difference meter and recorded.

3. Accelerated aging tests were conducted according to the conditions listed in Table 1 below.

TABLE 1

4. The conditions listed were individually subjected to accelerated aging tests.

5. And measuring and recording the color difference value delta E2 after accelerated aging by using a color difference meter.

6. The durability index of the toner writing was compared according to table 2 below.

TABLE 2

And (3) judging:

(1) and after accelerated aging of the handwriting, if the measured delta E is not more than the data listed in I1, the handwriting material is determined to be a durable handwriting material.

(2) The writing was considered to be relatively durable when Δ E was measured between I1 and I2 (including a value equal to I2) after accelerated aging of the writing.

(3) When the measured delta E after accelerated aging of the handwriting is larger than the data listed in I2, the handwriting material is determined to be non-durable handwriting material.

(4) After the accelerated aging of the handwriting, the color of the handwriting is obviously changed, and the durability is not determined no matter how the data is.

The results of the experiments are shown in table 3 below,

TABLE 3

As can be seen from the comparative data in the table, the addition of the antioxidant and the light stabilizer in the formula of the toner can effectively reduce the thermal oxidation and photo-oxidation reaction speeds of the color toner, improve the heat resistance and the light resistance of the color toner, delay the degradation and aging processes of the color toner, prolong the storage life of a printed product, and improve the appearance glossiness and the color reproducibility of a printed writing. Meanwhile, the interface compatibility between the color ink powder and paper fibers is improved by carrying out modification process treatment on the intermediate product, the combination firmness of the color ink powder and the paper is improved by physical adhesion and partial chemical bonding, and the phenomena of falling off of the color ink powder, adhesion of paper sheets, fading of colors and illegibility of writing of printed matters are delayed.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications of the present invention using this concept shall fall within the scope of infringing the present invention.

Claims (9)

1. An ink powder capable of printing durable writing, characterized in that: the toner is composed of the following specific components: the toner comprises resin, a pigment, an antioxidant, an interfacial compatilizer, a surface modifier, a light stabilizer, a charge regulator, wax and a surface additive, wherein the toner comprises the following components in parts by weight: 70-95 parts of resin, 1-10 parts of pigment, 0.1-5 parts of antioxidant, 0.1-5 parts of interfacial compatilizer, 0.1-5 parts of surface modifier, 0.1-5 parts of light stabilizer, 0.5-5 parts of charge regulator, 1-10 parts of wax and 1-5 parts of surface additive.

2. The toner of claim 1, wherein the toner comprises: the toner is composed of the following components in parts by weight: 70 parts of resin, 5 parts of pigment, 2 parts of antioxidant, 0.1 part of interfacial compatilizer, 0.9 part of surface modifier, 4 parts of light stabilizer, 3 parts of charge regulator, 10 parts of wax and 5 parts of surface additive.

3. The toner of claim 1, wherein the toner comprises: the resin is one or more of a copolymer of a styrene monomer and acrylic ester, a copolymer of a styrene monomer and methacrylic ester, a vinyl polymer and a copolymer thereof, a styrene copolymer, polyvinyl ether, polyvinyl ketone, polyether amine, polyurethane, rubbers, epoxy resin, polyvinyl butyral rosin, modified rosin, phenolic resin and polyester.

4. The toner of claim 1, wherein the toner comprises: the antioxidant comprises a main antioxidant, an antioxidant compounded by the main antioxidant and an auxiliary antioxidant, an organic hindered amine antioxidant and a sulfide antioxidant, wherein the main antioxidant is an organic hindered phenol antioxidant, and the auxiliary antioxidant is a phosphite antioxidant.

5. The toner of claim 1, wherein the toner comprises: the interfacial compatilizer is one or more of maleic anhydride grafted polylactic acid, maleic anhydride grafted polybutylene succinate and maleic anhydride grafted polyhydroxyalkanoate.

6. The toner of claim 1, wherein the toner comprises: the surface modifier is one or more of silane coupling agent, titanate coupling agent and stearic acid.

7. The toner of claim 1, wherein the toner comprises: the light stabilizer is one or more of hindered amine light stabilizer, ultraviolet absorbent and light shielding agent.

8. The toner of claim 1, wherein the toner comprises: the charge-modulating agents include electronegative CCAs and electropositive CCAs.

9. A method for preparing a toner for printing durable writings according to any one of claims 1 to 8, characterized in that: the preparation method comprises the following specific steps:

the method comprises the following steps: premixing, namely uniformly mixing the resin, the antioxidant, the light stabilizer, the charge regulator, the wax and the pigment by a mixer to obtain a premixed mixture;

step two: melt extrusion, namely melting and mixing the premixed mixture obtained in the step one through a mixing roll, extruding, cooling and tabletting to obtain a melt extrusion sheet;

step three: coarse crushing, namely crushing the melt extrusion sheet obtained in the step two by using mechanical crushing equipment to obtain crushed coarse particles, and finishing coarse crushing treatment;

step four: performing jet milling and grading, namely performing jet milling on the coarse particles obtained in the step three through a jet mill, and then grading to obtain an intermediate product;

step five: modification treatment, namely adding an interface compatilizer and a surface modifier into the intermediate product obtained in the step four for reaction treatment to obtain a modified intermediate product;

step six: and (5) post-treatment, namely adding a surface additive into the modified intermediate product obtained in the step five to obtain a finished product of the ink powder, and finishing the preparation of the ink powder.

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