A blue toner with water vapor-induced color change performance and preparation method thereof

Abstract

The invention discloses a blue toner with water vapor color-changing performance and a preparation method thereof. The blue toner with water vapor color-changing performance is composed of the following components: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of gas-phase silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene type niobium carbide, and 3-6 parts of cobalt stearate; the above materials are pre-mixed, mixed, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed, and finally sieved and packaged to prepare the toner product. The invention adds water vapor color-changing material to the toner, and after being prepared into toner, the toner has the performance of changing color when it comes into contact with water without affecting the printing effect. After being configured into printing toner, the printer prints clear text, the amount of waste toner is small, and the water vapor content in the environment can be detected.

Description

Technical Field

[0001] The invention relates to a blue toner with water vapor color-changing performance and a preparation method thereof, belonging to the technical field of developing toners. Background Art

[0002] Toner is a powdered substance used in laser printers to form images on paper. The main requirements for toner products are bright and pure colors. After being configured into printing toner, the toner particles should have uniform particle size distribution, moderate size and regular and uniform shape.

[0003] With the continuous improvement of printing technology, new toners with higher image density and fixing fastness and less waste toner generation are the main materials of toner. The fixing fastness of toners in the prior art will be affected and the performance will also change under the condition of high air humidity. Toners in the prior art cannot detect the water content in the air, so they are easily damaged and ineffective under the condition of high air humidity. Summary of the invention

[0004] The purpose of the present invention is to provide a blue toner with water vapor color change performance, which can effectively detect the water vapor content ratio in the air, promote the storage space to maintain a certain degree of dryness, prolong the storage time of the goods, and play an important role in economic benefits. At the same time, the present invention also provides a preparation method of the toner.

[0005] The blue toner with water vapor color-changing properties of the present invention adopts the following technical scheme: a blue toner with water vapor color-changing properties, which is mixed by the following materials in parts by weight: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of fumed silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene type niobium carbide, and 3-6 parts of cobalt stearate.

[0006] The method for preparing a blue toner having a water vapor-induced color change property of the present invention comprises the following steps: (1) raw material preparation: weighing the following materials in parts by weight: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of fumed silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene-type niobium carbide, and 3-6 parts of cobalt stearate; (2) premixing: putting the weighed styrene-propylene polymer resin, polyester fiber, wax, blue pigment, charge control agent, MXene-type niobium carbide, and cobalt stearate into a mixer and mixing them uniformly; (3) kneading: kneading the premixed materials in a continuous kneading machine. ; (4) Cooling: The mixed material is cooled and crushed into flake materials by steel belt rolling; (5) Coarse grinding: The flake materials are placed in a coarse grinding machine for grinding, and the particle size of the materials after grinding is controlled within 1.5 mm; (6) Air flow grinding: The coarsely ground materials are placed in an air flow grinding machine for grinding, and the particle size of the materials is controlled within 5 to 10 μm; (7) Spheroidization: The air flow-ground materials are subjected to surface spheroidization treatment by a micro powder surface modification treatment machine; (8) External addition and mixing: The material obtained in step (7) is placed in a mixer together with weighed fumed silica and titanium dioxide for mixing; (9) Screening and packaging: The mixed material obtained in step (8) is screened by a vibrating screen and packaged according to specifications.

[0007] The premixing in step (2) is carried out by using a high-speed mixer. The materials are added to the mixer and first mixed at a low speed for 60 seconds, then mixed at a high speed for 120 seconds, paused for 60 seconds, and the above steps are repeated twice.

[0008] The external addition mixing in step (8) is carried out by using a high-speed mixer. The materials are added to the mixer and first mixed at a low speed for 60 seconds, then mixed at a high speed for 120 seconds, paused for 60 seconds, and the above steps are repeated twice.

[0009] The speed of the high-speed mixer for low-speed mixing is 60-80 rpm, and the speed of the high-speed mixing is 150-180 rpm.

[0010] In step (9), the screen mesh of the vibrating screen machine used is 120 mesh.

[0011] The beneficial effects of the present invention are as follows: the present invention adopts a MXene-type niobium carbide and cobalt stearate complex as an innovation point, and its advantages are: (1) the layered structure of MXene has a large specific surface area, and therefore has good adsorption performance, which is beneficial to improving the adhesion between the toner and the paper, thereby improving the fixing fastness of the toner; (2) the MXene layered structure has a small molar volume, good electrical conductivity, and excellent structural stability under applied strain and temperature, so it can further improve the dispersibility, reduce the amount of waste powder, make the toner melt at a uniform temperature at high temperature, and the printed product of the toner has good image quality, long shelf life, and a fixing fastness of more than 97%; (3) cobalt stearate is a cobalt salt, which changes color when it comes into contact with water, and thus has a water vapor color-changing property, which can detect the water content in the air.

[0012] The present invention adds a water vapor-induced color-changing material to the coloring agent, and after being prepared into a toner, the toner has the property of changing color when it comes into contact with water without affecting the printing effect. The blue coloring agent made of the complex of cobalt stearate and MXene-type niobium carbide can obviously reflect the water vapor-induced color-changing effect. The main reason is that: the layered structure of MXene has a large specific surface area, so it has good adsorption performance, and cobalt stearate can be adsorbed into the MXene layered structure through physical and chemical interactions, so that the product performance is stable; cobalt stearate is a common cobalt salt, which can change from blue to red when it comes into contact with water, and is suitable for detecting the amount of water content in the air. The combination of these two materials can further improve the image density and fixing firmness, reduce the amount of waste powder, and improve the adhesion and glossiness of the toner. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 These are the test results of color, image effects and fixing fastness of Examples 1-9 and Comparative Examples 1-3. DETAILED DESCRIPTION

[0014] The content of the present invention can be more easily understood by referring to the following preferred implementation cases of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood in the field to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0015] For example, the term "prepared from" as used herein is synonymous with "comprising". As used herein, "comprising", "including", "having" or any other variation thereof, is intended to cover a non-exclusive inclusion. For example, a composition, step, method, or apparatus comprising a listed element is not limited to only those elements but includes other elements not expressly listed or inherent elements.

[0016] When an amount, concentration or other value is expressed as a range, a preferred range or a range limited by a series of upper and lower limits, it should be understood that all ranges formed by any pairing of any range upper and lower limits or preferred values ​​are specifically disclosed, regardless of whether the range is disclosed separately. For example, when the disclosed range is "1 to 5", the described range should be understood to include the range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", etc. When a numerical range is described in this article, unless otherwise stated, the range is intended to include its end values ​​and all integers and fractions within the range.

[0017] In addition, the indefinite articles "a" and "an" before the elements or components of the present invention have no limitation on the quantity requirements of the elements or components. Therefore, "a" and "an" should be interpreted as including one or at least one, and the elements or components in the singular form also include the plural form, unless the number obviously represents the singular form.

[0018] A method for preparing a blue toner having hydrochromic properties according to an embodiment of the present invention comprises the following steps:

[0019] (1) Raw material preparation: weigh the following materials in parts by weight: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of fumed silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene-type niobium carbide, and 3-6 parts of cobalt stearate;

[0020] (2) Premixing: The weighed styrene propylene polymer resin, polyester fiber, wax, blue pigment, charge control agent, MXene type niobium carbide, and cobalt stearate are put into a mixer and mixed evenly. Specifically, a high-speed mixer is used for mixing. The materials are added to the mixer, first mixed at a low speed for 60 seconds, then mixed at a high speed for 120 seconds, paused for 60 seconds, and the above steps are repeated twice; the speed of the high-speed mixer for low-speed mixing is 60-80 rpm, and the speed of the high-speed mixing is 150-180 rpm;

[0021] (3) Mixing: Mixing the premixed materials by a continuous mixer;

[0022] (4) Cooling: The mixed material is cooled by steel belt rolling and crushed into flake materials;

[0023] (5) Coarse grinding: the above-mentioned flaky materials are placed in a coarse grinder for grinding, and the particle size of the materials after grinding is controlled within 1.5 mm;

[0024] (6) Airflow pulverization: The coarsely pulverized material is placed in an airflow pulverizer for pulverization to control the particle size of the material to 5 to 10 μm;

[0025] (7) Spheroidization treatment: The above-mentioned air flow crushed material is subjected to surface spheroidization treatment by a micro powder surface modification treatment machine;

[0026] (8) External addition and mixing: the material obtained in step (7) is placed in a mixer together with weighed fumed silica and titanium dioxide for mixing. Specifically, a high-speed mixer is used for mixing. The material is added to the mixer, first mixed at a low speed for 60 seconds, then mixed at a high speed for 120 seconds, paused for 60 seconds, and then repeated twice. The speed of the high-speed mixer for low-speed mixing is 60-80 rpm, and the speed of the high-speed mixing is 150-180 rpm.

[0027] (9) Screening and packaging: The mixed material obtained in step (8) is screened using a vibrating screen machine and then packaged according to specifications, wherein the screen of the vibrating screen machine is 120 mesh.

[0028] The blue toner with water vapor-induced color change properties prepared according to the above method is mixed by the following materials in parts by weight: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of fumed silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene-type niobium carbide, and 3-6 parts of cobalt stearate.

[0029] The blue toner with water vapor color change performance of the present invention is described from a specific example. In the following embodiments, the manufacturer of styrene-propylene polymer resin is Guangzhou Dolphin New Materials Co., Ltd., model: H-941; the manufacturer of polyester fiber is Nanjing Jiaoke Ruilu Co., Ltd., model: LURA high-strength polyester fiber; the manufacturer of wax is Nanjing Tianshi New Materials Technology Co., Ltd., model: D-103; the manufacturer of blue pigment is Henan Huamei Chengde Pigment Co., Ltd., model: Royal Blue La90-410; the manufacturer of charge control agent is German Clariant Chemical Co., Ltd., the manufacturer of fumed silica is Hubei Huifu Nanomaterial Co., Ltd., model: A-200; the manufacturer of titanium dioxide is Langfang Boma Chemical Co., Ltd., model: R-298; the manufacturer of niobium carbide MXene is Guangzhou Sanxin Metal Technology Co., Ltd., model: 12011-99-3; the manufacturer of cobalt stearate is Shandong Xuchen Chemical Technology Co., Ltd., model: 1002-88-6. In the following embodiments, each material component is measured by weight.

[0030] Example 1

[0031] Ingredients: 65 parts of styrene propylene polymer resin, 15 parts of polyester fiber, 5 parts of wax, 5 parts of blue pigment, 1 part of charge control agent, 2 parts of fumed silica, 1 part of titanium dioxide, 3 parts of niobium carbide MXene, and 3 parts of cobalt stearate.

[0032] The materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0033] Example 2

[0034] Ingredients: 65 parts of styrene propylene polymer resin, 15 parts of polyester fiber, 4 parts of wax, 5 parts of blue pigment, 2 parts of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, 3 parts of niobium carbide MXene, and 4 parts of cobalt stearate.

[0035] The materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0036] Example 3

[0037] Ingredients: 67 parts of styrene propylene polymer resin, 13 parts of polyester fiber, 4 parts of wax, 5 parts of blue pigment, 1 part of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, 3 parts of niobium carbide MXene, and 5 parts of cobalt stearate.

[0038] The materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0039] Example 4

[0040] Ingredients: 66 parts of styrene propylene polymer resin, 13 parts of polyester fiber, 4 parts of wax, 5 parts of blue pigment, 1 part of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, 3 parts of niobium carbide MXene, and 6 parts of cobalt stearate.

[0041] The materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0042] Example 5

[0043] Ingredients: 65 parts of styrene propylene polymer resin, 16 parts of polyester fiber, 5 parts of wax, 5 parts of blue pigment, 1 part of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, 2 parts of niobium carbide MXene, and 4 parts of cobalt stearate.

[0044] The materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0045] Example 6

[0046] Ingredients: 63 parts of styrene propylene polymer resin, 14 parts of polyester fiber, 5 parts of wax, 5 parts of blue pigment, 3 parts of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, 4 parts of niobium carbide MXene, and 4 parts of cobalt stearate.

[0047] The above materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0048] Example 7

[0049] Ingredients: 63 parts of styrene propylene polymer resin, 14 parts of polyester fiber, 4 parts of wax, 5 parts of blue pigment, 1 part of charge control agent, 3 parts of fumed silica, 1 part of titanium dioxide, 5 parts of niobium carbide MXene, and 4 parts of cobalt stearate.

[0050] The above materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, externally added and mixed according to the above preparation method, and finally sieved and packaged to prepare a toner product.

[0051] Example 8

[0052] Ingredients: 60 parts of styrene propylene polymer resin, 18 parts of polyester fiber, 6 parts of wax, 7 parts of blue pigment, 2.5 parts of charge control agent, 1 part of fumed silica, 0.5 parts of titanium dioxide, 2 parts of niobium carbide MXene, and 3 parts of cobalt stearate.

[0053] Example 9

[0054] Ingredients: 70 parts of styrene propylene polymer resin, 13 parts of polyester fiber, 3 parts of wax, 4 parts of blue pigment, 1 part of charge control agent, 2 parts of fumed silica, 2 parts of titanium dioxide, 2 parts of niobium carbide MXene, and 3 parts of cobalt stearate.

[0055] Comparative Example 1

[0056] Ingredients: 68 parts of styrene-acrylic polymer resin, 17 parts of polyester fiber, 5 parts of wax, 5 parts of blue pigment, 2 parts of charge control agent, 2 parts of fumed silica, and 1 part of titanium dioxide.

[0057] Steps: premixing, kneading, cooling, coarse crushing, air flow crushing, spheroidizing, and finally screening and packaging the above materials to prepare the toner product.

[0058] Comparative Example 2

[0059] Ingredients: 67 parts of styrene propylene polymer resin, 16 parts of polyester fiber, 5 parts of wax, 5 parts of blue pigment, 2 parts of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, and 3 parts of niobium carbide MXene.

[0060] Steps: The first 7 materials are pre-mixed, kneaded, cooled, roughly crushed, air flow crushed, spheroidized, and then added with niobium carbide MXene, and finally sieved and packaged to prepare a toner product.

[0061] Comparative Example 3

[0062] Ingredients: 66 parts of styrene-acrylic polymer resin, 16 parts of polyester fiber, 5 parts of wax, 5 parts of blue pigment, 2 parts of charge control agent, 1 part of fumed silica, 1 part of titanium dioxide, and 4 parts of cobalt stearate.

[0063] Steps: premix, knead, cool, coarsely crush, air flow crush, spheroidize the first 7 materials, add cobalt stearate to the mixture, and finally sieve and package to prepare the toner product.

[0064] The performance of the blue toners with water vapor color change properties prepared in Examples 1-9 and Comparative Examples 1-3 was evaluated as follows:

[0065] 1. Fixing fastness: Use a copier to copy the toner product onto copy paper to form a copy, cut the copy into 2cm wide strips, measure the density of the strips with a reflection densitometer, and then put the sample on the MC-1 friction tester to rub it back and forth twice, measure the density after friction, and calculate the fixing fastness according to the following formula:

[0066] Fixing firmness = D 后 / D 前 ×100%

[0067] Among them, D 前 is the density value before friction, D 后 is the density value after rubbing twice.

[0068] Comparing Examples 1-9 with Comparative Examples 1-3, the comparison results are as follows Figure 1 As shown in the table, Figure 1 It can be analyzed that after adding cobalt stearate and MXene-type niobium carbide complex in Example 1-9, the fixing firmness of the product is improved to a certain extent and the amount of waste powder is reduced.

[0069] 2. Produce water vapor-induced discoloration: Use a copier to copy the toner product onto copy paper to form a copy, cut the copy into 2 cm wide strips, put the 2 cm wide strip sample into water, and after standing for 10 seconds, the color can be observed to change from blue to purple. Take it out and let it dry in the air, and the color of the paper will turn blue again.

[0070] Comparing Examples 1-9 with Comparative Examples 1-3, after adding cobalt stearate and MXene-type niobium carbide complex, the product will change color in a relatively humid environment, so the products of Examples 1-9 can be used to detect humidity in the air.

[0071] 3. Color and image effects:

[0072] The products prepared in Examples 1-9 and Comparative Examples 1-3 were printed on a HP color laser printer and used in a 90% humidity environment. The color and image effects were as follows: Figure 1 The products of Examples 1-9 are all superior to the products of Comparative Examples 1-3.

[0073] The present invention adds a water vapor-induced color-changing material to the coloring agent, and after being prepared into a toner, the toner has the property of changing color when it comes into contact with water without affecting the printing effect. The blue coloring agent made of the complex of cobalt stearate and MXene-type niobium carbide can obviously reflect the water vapor-induced color-changing effect. The main reason is that: the layered structure of MXene has a large specific surface area, so it has good adsorption performance, and cobalt stearate can be adsorbed into the MXene layered structure through physical and chemical interactions, so that the product performance is stable; cobalt stearate is a common cobalt salt, which can change from blue to red when it comes into contact with water, and is suitable for detecting the amount of water content in the air. The combination of these two materials can further improve the image density and fixing firmness, reduce the amount of waste powder, and improve the adhesion and glossiness of the toner.

[0074] The blue toner with water vapor color-changing properties of the present invention refers to a material that changes color when it encounters water molecules due to the cobalt element contained therein. As the water content increases, the product gradually changes from blue to purple, and when the water content decreases, the color is restored. It is a toner with reversible function.

[0075] The foregoing embodiments are merely illustrative and are used to explain some features of the present invention. The appended claims are intended to claim the widest possible range that can be imagined. Therefore, it is the applicant's intention that the appended claims are not limited by the selection of examples that illustrate the features of the present invention. Some numerical ranges used in the claims also include sub-ranges within them, and changes in these ranges may also be interpreted as being covered by the appended claims.

Claims

1. A blue toner having water vapor-induced color change properties, characterized in that: The invention is prepared by mixing the following materials in parts by weight: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of fumed silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene-type niobium carbide and 3-6 parts of cobalt stearate.

2. A method for preparing a blue toner having water vapor-induced color change properties, characterized in that: It includes the following steps: (1) Raw material preparation: weigh the following materials in parts by weight: 60-70 parts of styrene-propylene polymer resin, 13-18 parts of polyester fiber, 3-6 parts of wax, 4-7 parts of blue pigment, 1-3 parts of charge control agent, 1-3 parts of fumed silica, 0.5-2 parts of titanium dioxide, 2-5 parts of MXene-type niobium carbide, and 3-6 parts of cobalt stearate; (2) Premixing: put the weighed styrene-propylene polymer resin, polyester fiber, wax, blue pigment, charge control agent, MXene-type niobium carbide, and cobalt stearate into a mixer and mix them evenly; the premixing of step (2) is carried out by a high-speed mixer. The materials are added to the mixer, first mixed at a low speed for 60 seconds, then mixed at a high speed for 120 seconds, paused for 60 seconds, and the above steps are repeated twice; (3) Mixing: The premixed materials are mixed by a continuous mixer; (4) Cooling: The mixed materials are passed through a steel mixer. Belt rolling cooling and crushing into flake materials; (5) coarse grinding: the flake materials are placed in a coarse grinding machine for grinding, and the particle size of the materials after grinding is controlled within 1.5 mm; (6) air flow grinding: the coarsely ground materials are placed in an air flow grinding machine for grinding, and the particle size of the materials is controlled within 5 to 10 μm; (7) spheroidization treatment: the air flow-pulverized materials are subjected to surface spheroidization treatment by a micro powder surface modification treatment machine; (8) external addition mixing: the material obtained in step (7) is placed in a mixer together with weighed fumed silica and titanium dioxide for mixing; the external addition mixing in step (8) is mixed by a high-speed mixer, the materials are added to the mixer, first mixed at a low speed for 60 seconds, then mixed at a high speed for 120 seconds, paused for 60 seconds, and the above steps are repeated twice; (9) screening and packaging: the mixed material obtained in step (8) is screened by a vibrating screen and packaged according to specifications.

3. The method for preparing a blue toner having hydrochromic properties according to claim 2, characterized in that: The speed of the high-speed mixer for low-speed mixing is 60-80 rpm, and the speed of the high-speed mixing is 150-180 rpm.

4. The method for preparing a blue toner having hydrochromic properties according to claim 2, characterized in that: In step (9), the screen mesh of the vibrating screen machine used is 120 mesh.

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