A high-temperature resistant pigment and its preparation method
By treating pigments with modified titanium dioxide and rare earth oxides, and combining them with dispersants and modifiers, the problem of poor heat resistance of pigments during high-temperature heating was solved, thereby improving the high-temperature stability and dispersibility of pigments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG JINYI TECH CO LTD
- Filing Date
- 2023-05-19
- Publication Date
- 2026-05-26
AI Technical Summary
Pigment powder has poor heat resistance during high-temperature heating, resulting in a low coloring rate and affecting the performance of plastic products.
The color powder was modified with modified titanium dioxide and rare earth oxides and then uniformly distributed on the surface of the color powder with a dispersant. The color powder was modified with maleic anhydride grafted polypropylene, tetraethyl orthosilicate and silica sol, and a coupling agent was added to improve compatibility and stability.
It significantly improves the high-temperature stability and dispersibility of pigments, and enhances their high-temperature resistance and weather resistance.
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Figure BDA0004238424210000081
Abstract
Description
Technical Field
[0001] This invention relates to the field of color powder, and in particular to a high-temperature resistant color powder and its preparation method. Background Technology
[0002] Color powder is a colored powder substance that, when mixed with plastic pigments, is heated and injection molded into plastic products of various colors.
[0003] In the plastics industry, color powder is commonly used to color plastics. The plastic raw materials and color powder are mixed and then melt-blended and colored using mixing equipment such as a twin-screw extruder. However, during the production process, the color powder needs to be heated at high temperatures. The color powder has poor heat resistance during the coloring process, resulting in a low coloring rate, which to some extent affects the performance of the product. Summary of the Invention
[0004] To improve the high-temperature resistance of pigments, this application provides a high-temperature resistant pigment and its preparation method.
[0005] Firstly, the high-temperature resistant colorant provided in this application adopts the following technical solution:
[0006] A high-temperature resistant pigment is made from the following raw materials in parts by weight: 20-60 parts pigment; 10-20 parts modified titanium dioxide; 2-8 parts rare earth oxides; 5-15 parts dispersant; 2-6 parts coupling agent; and 10-20 parts water. The modified titanium dioxide is made from titanium dioxide, maleic anhydride-grafted polypropylene, tetraethyl orthosilicate, silica sol, and ethanol.
[0007] By adopting the above technical solution, this application modifies the color powder using modified titanium dioxide and rare earth oxides. Both modified titanium dioxide and rare earth oxides have good heat resistance. As stabilizers, the rare earth oxides and modified titanium dioxide are uniformly distributed on the surface of the color powder under the action of the dispersant, which can significantly improve the stability and dispersibility of the color powder. Simultaneously, it increases the interaction force between the modified titanium dioxide and rare earth oxides and the surface of the color powder, making it less likely for them to detach from the color powder surface and improving steric hindrance. The alkoxy groups in the coupling agent can protect the anhydride groups of maleic anhydride grafted onto polypropylene in the modified titanium dioxide, thereby improving the compatibility between the modified titanium dioxide and the color powder, giving the color powder good high-temperature stability.
[0008] Preferably, the modified titanium dioxide is prepared by mixing 15-20 parts by weight of titanium dioxide with 5-10 parts by weight of tetraethyl orthosilicate and 10-20 parts by weight of silica sol, stirring evenly, and then drying; then mixing with 10-20 parts by weight of maleic anhydride-grafted polypropylene and 20-40 parts by weight of ethanol, stirring, allowing to stand, drying and calcining to obtain the modified titanium dioxide.
[0009] By adopting the above technical solution, titanium dioxide is modified by grafting maleic anhydride onto polypropylene, tetraethyl orthosilicate, and silica sol. Titanium dioxide is immersed in a mixture of maleic anhydride-grafted polypropylene, tetraethyl orthosilicate, and silica sol, which causes tetraethyl orthosilicate to adhere to the surface of titanium dioxide, thereby reducing the specific surface area and pore volume of titanium dioxide. The anhydride groups of maleic anhydride-grafted polypropylene can improve the dispersibility of tetraethyl orthosilicate, thus serving as a bridge to enhance the adhesion and compatibility between titanium dioxide and tetraethyl orthosilicate.
[0010] Preferably, the maleic anhydride-grafted polypropylene is pretreated maleic anhydride-grafted polypropylene. The pretreated maleic anhydride-grafted polypropylene is prepared by mixing 20-40 parts by weight of maleic anhydride-grafted polypropylene, 2-6 parts by weight of antioxidant and 10-20 parts by weight of iron black, and then extruding and granulating the mixture to obtain the pretreated maleic anhydride-grafted polypropylene.
[0011] By adopting the above technical solution, this application pretreats maleic anhydride-grafted polypropylene, mixes maleic anhydride-grafted polypropylene with iron black, and combines iron black with antioxidants to give maleic anhydride-grafted polypropylene good resistance to thermo-oxidative aging. This further improves the heat resistance of modified titanium dioxide when maleic anhydride-grafted polypropylene modifies titanium dioxide. Iron black is attached to titanium dioxide through maleic anhydride-grafted polypropylene, and modified titanium dioxide is then mixed with rare earth oxides and attached to the pigment. The mixture of multiple metal oxides can significantly improve the high temperature resistance and weather resistance of the pigment.
[0012] Preferably, the dispersant comprises one of polyvinyl alcohol and polyethylene wax.
[0013] By adopting the above technical solution and selecting a suitable dispersant, the pigment, modified titanium dioxide and rare earth oxide can be kept in a relatively stable dispersion in the composition, making it difficult for the particles to aggregate.
[0014] Preferably, the particle size range of the modified titanium dioxide is 20-40 μm.
[0015] By adopting the above technical solution, controlling the particle size range of modified titanium dioxide can better disperse the modified titanium dioxide on the color powder, and better adhere the modified titanium dioxide to the color powder, thereby improving the modification effect of the color powder, improving the stability of the color powder, and giving the color powder good high temperature resistance.
[0016] Preferably, the rare earth oxide includes one of lanthanum oxide and europium oxide.
[0017] Preferably, the weight ratio of the color powder, modified titanium dioxide, and rare earth oxide is 1:(0.42-0.45):(0.06-0.11).
[0018] By adopting the above technical solution, when the pigment, modified titanium dioxide, and rare earth oxides are mixed in a specific weight ratio, and a suitable rare earth oxide is selected, the modified titanium dioxide and rare earth oxides adhere to the surface of the pigment, improving the density of the pigment. The rare earth oxides and modified titanium dioxide form a fine-grained structure, which protects the pigment and makes it difficult for ultraviolet rays to come into contact with the pigment, thus giving the obtained pigment good weather resistance.
[0019] Preferably, the grafting rate of the maleic anhydride-grafted polypropylene is 1.45-1.89%.
[0020] By adopting the above technical solution, this application limits the grafting rate of maleic anhydride-grafted polypropylene, so that maleic anhydride-grafted polypropylene has more grafted branches, which is beneficial for iron black to adhere to maleic anhydride-grafted polypropylene, thereby making the adhesion between modified titanium dioxide and iron black higher, and thus improving the high temperature resistance of the pigment.
[0021] Secondly, this application provides a method for preparing high-temperature resistant pigments using the following technical solution:
[0022] A method for preparing a high-temperature resistant pigment includes the following steps:
[0023] S1. Mix the coupling agent and water evenly, then add modified titanium dioxide and rare earth oxides and stir evenly to obtain a mixture; S2. Add dispersant and color powder to the mixture and stir evenly, then grind and dry to obtain high temperature resistant color powder.
[0024] By adopting the above technical solution and the above method, the pigment prepared can have good high temperature resistance.
[0025] Preferably, the temperature during the stirring process in step S2 is 70-90℃.
[0026] By adopting the above technical solution and controlling the temperature during stirring, the color powder, modified titanium dioxide and rare earth oxides can be mixed and dispersed more evenly, thereby improving the high temperature resistance of the color powder.
[0027] In summary, this application has the following beneficial effects:
[0028] 1. This application modifies the pigment powder using modified titanium dioxide and rare earth oxides. Both modified titanium dioxide and rare earth oxides have good heat resistance. As stabilizers, the rare earth oxides and modified titanium dioxide are uniformly distributed on the pigment powder surface under the action of a dispersant, which can significantly improve the stability and dispersibility of the pigment powder. Simultaneously, it increases the interaction force between the modified titanium dioxide and rare earth oxides and the pigment powder surface, making it less likely for them to detach from the pigment powder surface and improving steric hindrance. The alkoxy groups in the coupling agent can protect the anhydride groups of maleic anhydride grafted onto polypropylene in the modified titanium dioxide, thereby improving the compatibility between the modified titanium dioxide and the pigment powder, giving the pigment powder good high-temperature stability.
[0029] 2. Titanium dioxide was modified by grafting maleic anhydride onto polypropylene, tetraethyl orthosilicate, and silica sol. Titanium dioxide was immersed in a mixture of maleic anhydride-grafted polypropylene, tetraethyl orthosilicate, and silica sol, which allowed tetraethyl orthosilicate to adhere to the surface of titanium dioxide, reducing the specific surface area and pore volume of titanium dioxide. The anhydride groups of maleic anhydride-grafted polypropylene can improve the dispersibility of tetraethyl orthosilicate, thus acting as a bridge to enhance the adhesion and compatibility between titanium dioxide and tetraethyl orthosilicate.
[0030] 3. This application pretreats maleic anhydride-grafted polypropylene, mixes it with iron black, and combines the iron black with an antioxidant to give the maleic anhydride-grafted polypropylene good resistance to thermo-oxidative aging. This further improves the heat resistance of modified titanium dioxide when the maleic anhydride-grafted polypropylene modifies it. The iron black is attached to the titanium dioxide through the maleic anhydride-grafted polypropylene, and the modified titanium dioxide is then mixed with rare earth oxides and attached to the pigment. The mixture of multiple metal oxides can significantly improve the high temperature resistance of the pigment. Detailed Implementation
[0031] The present application will be further described in detail below with reference to embodiments and comparative examples.
[0032] Preparation Example
[0033] Preparation Example 1
[0034] A method for preparing pretreated maleic anhydride-grafted polypropylene:
[0035] 20 kg of maleic anhydride-grafted polypropylene, 2 kg of antioxidant 1010 and 10 kg of iron black were added to a mixer and stirred for 20 min at 80℃; then fed into a screw extruder for extrusion granulation at 180℃ to obtain pretreated maleic anhydride-grafted polypropylene.
[0036] Preparation Example 2
[0037] A method for preparing pretreated maleic anhydride-grafted polypropylene:
[0038] 40 kg of maleic anhydride-grafted polypropylene, 6 kg of antioxidant 1010 and 20 kg of iron black were added to a mixer and stirred for 20 min at 80℃; then fed into a screw extruder for extrusion granulation at 180℃ to obtain pretreated maleic anhydride-grafted polypropylene.
[0039] Preparation Example 3
[0040] A method for preparing pretreated maleic anhydride-grafted polypropylene:
[0041] 30 kg of maleic anhydride-grafted polypropylene, 4 kg of antioxidant 1010 and 15 kg of iron black were added to a mixer and stirred for 20 min at 80℃; then fed into a screw extruder for extrusion granulation at 180℃ to obtain pretreated maleic anhydride-grafted polypropylene.
[0042] Example
[0043] Example 1
[0044] A method for preparing high-temperature resistant pigment:
[0045] S1. Add 2kg of coupling agent and 10kg of water into a mixing pot and mix evenly for 10min at a temperature of 60℃ and a speed of 600rpm. Then add 10kg of modified titanium dioxide and 2kg of rare earth oxide and stir for 5min at a temperature of 70℃ and a speed of 800rpm to obtain a mixture.
[0046] S2. Add 5 kg of dispersant and 20 kg of color powder to the mixture and stir for 10 min at 70 °C and 800 rpm. Transfer to a nano-sand mill and grind until D95 < 0.2 μm. Dry at 90 °C for 2 h to obtain high-temperature resistant color powder.
[0047] The rare earth oxide is lanthanum oxide, the dispersant is polyethylene glycol with a molecular weight of 200, and the coupling agent is titanate coupling agent 201.
[0048] The preparation method of modified titanium dioxide is as follows:
[0049] 15 kg of titanium dioxide was stirred with 5 kg of tetraethyl orthosilicate and 10 kg of silica sol at 60 °C for 30 min, and then dried at 80 °C for 2 h. Then it was mixed with 10 kg of maleic anhydride-grafted polypropylene and 20 kg of ethanol, stirred at 60 °C for 5 min, allowed to stand and soak for 2 h, dried at 120 °C for 24 h, and then transferred to a calcining kiln and calcined at 600 °C for 2 h to obtain modified titanium dioxide.
[0050] The titanium dioxide has a particle size of 20 μm, the maleic anhydride-grafted polypropylene has a grafting rate of 1.45%, and the silica sol has a viscosity of 3.0.
[0051] Example 2
[0052] A method for preparing high-temperature resistant pigment:
[0053] S1. Add 6 kg of coupling agent and 20 kg of water into a mixing pot and mix evenly for 10 min at a temperature of 60℃ and a speed of 600 rpm. Then add 20 kg of modified titanium dioxide and 8 kg of rare earth oxides and stir for 5 min at a temperature of 70℃ and a speed of 800 rpm to obtain a mixture.
[0054] S2. Add 15 kg of dispersant and 60 kg of color powder to the mixture and stir for 10 min at 70 °C and 800 rpm. Transfer to a nano-sand mill and grind until D95 < 0.2 μm. Dry at 90 °C for 2 h to obtain high-temperature resistant color powder.
[0055] The rare earth oxide is lanthanum oxide, the dispersant is polyethylene glycol with a molecular weight of 200, and the coupling agent is titanate coupling agent 201.
[0056] The preparation method of modified titanium dioxide is as follows:
[0057] 15 kg of titanium dioxide was stirred with 5 kg of tetraethyl orthosilicate and 10 kg of silica sol at 60 °C for 30 min, and then dried at 80 °C for 2 h. Then it was mixed with 10 kg of maleic anhydride-grafted polypropylene and 20 kg of ethanol, stirred at 60 °C for 5 min, allowed to stand and soak for 2 h, dried at 120 °C for 24 h, and then transferred to a calcining kiln and calcined at 600 °C for 2 h to obtain modified titanium dioxide.
[0058] The titanium dioxide has a particle size of 40 μm, the maleic anhydride-grafted polypropylene has a grafting rate of 1.89%, and the silica sol has a viscosity of 3.0.
[0059] Example 3
[0060] A method for preparing high-temperature resistant pigment:
[0061] S1. Add 4 kg of coupling agent and 15 kg of water into a mixing pot and mix evenly for 10 min at a temperature of 60℃ and a speed of 600 rpm. Then add 15 kg of modified titanium dioxide and 5 kg of rare earth oxide and stir for 5 min at a temperature of 70℃ and a speed of 800 rpm to obtain a mixture.
[0062] S2. Add 10 kg of dispersant and 40 kg of color powder to the mixture and stir for 10 min at 70 °C and 800 rpm. Transfer to a nano-sand mill and grind until D95 < 0.2 μm. Dry at 90 °C for 2 h to obtain high-temperature resistant color powder.
[0063] The rare earth oxide is lanthanum oxide, the dispersant is polyethylene glycol with a molecular weight of 200, and the coupling agent is titanate coupling agent 201.
[0064] The preparation method of modified titanium dioxide is as follows:
[0065] 15 kg of titanium dioxide was stirred with 5 kg of tetraethyl orthosilicate and 10 kg of silica sol at 60 °C for 30 min, and then dried at 80 °C for 2 h. Then it was mixed with 10 kg of maleic anhydride-grafted polypropylene and 20 kg of ethanol, stirred at 60 °C for 5 min, allowed to stand and soak for 2 h, dried at 120 °C for 24 h, and then transferred to a calcining kiln and calcined at 600 °C for 2 h to obtain modified titanium dioxide.
[0066] The titanium dioxide has a particle size of 30 μm, the maleic anhydride-grafted polypropylene has a grafting rate of 1.45%, and the silica sol has a viscosity of 3.0.
[0067] Example 4
[0068] A method for preparing a high-temperature resistant pigment differs from Example 3 in that the preparation method of the modified titanium dioxide is different: 20 kg of titanium dioxide, 10 kg of tetraethyl orthosilicate, and 20 kg of silica sol are stirred at 60°C for 30 min and then dried at 80°C for 2 h; then it is mixed with 20 kg of maleic anhydride-grafted polypropylene and 40 kg of ethanol, stirred at 60°C for 5 min, allowed to stand and soak for 2 h, dried at 120°C for 24 h, and then transferred to a calcining kiln and calcined at 600°C for 2 h to obtain modified titanium dioxide.
[0069] Example 5
[0070] A method for preparing a high-temperature resistant pigment differs from Example 3 in that the preparation method of the modified titanium dioxide is different: 17.5 kg of titanium dioxide, 7.5 kg of tetraethyl orthosilicate, and 15 kg of silica sol are stirred at 60°C for 30 min and then dried at 80°C for 2 h; then it is mixed with 15 kg of maleic anhydride-grafted polypropylene and 30 kg of ethanol, stirred at 60°C for 5 min, allowed to stand and soak for 2 h, dried at 120°C for 24 h, and then transferred to a calcining kiln and calcined at 600°C for 2 h to obtain modified titanium dioxide.
[0071] Example 6
[0072] A method for preparing a high-temperature resistant pigment differs from Example 5 in that maleic anhydride-grafted polypropylene is replaced in an equal amount with the maleic anhydride-grafted polypropylene obtained in Preparation Example 1.
[0073] Example 7
[0074] A method for preparing a high-temperature resistant pigment differs from Example 5 in that maleic anhydride-grafted polypropylene is replaced in an equal amount with the maleic anhydride-grafted polypropylene obtained in Preparation Example 2.
[0075] Example 8
[0076] A method for preparing a high-temperature resistant pigment differs from Example 5 in that maleic anhydride-grafted polypropylene is replaced in an equal amount with the maleic anhydride-grafted polypropylene obtained in Preparation Example 3.
[0077] Example 9
[0078] A method for preparing a high-temperature resistant pigment differs from Example 8 in that the rare earth oxide is lanthanum oxide, the amount of pigment added is 40 kg, the amount of modified titanium dioxide added is 16.8 kg, and the amount of rare earth oxide added is 2.4 kg.
[0079] Example 10
[0080] A method for preparing a high-temperature resistant pigment differs from Example 8 in that the rare earth oxide is lanthanum oxide, the amount of pigment added is 40 kg, the amount of modified titanium dioxide added is 18 kg, and the amount of rare earth oxide added is 4.2 kg.
[0081] Example 11
[0082] A method for preparing a high-temperature resistant pigment differs from Example 8 in that the rare earth oxide is europium oxide, the amount of pigment added is 40 kg, the amount of modified titanium dioxide added is 18 kg, and the amount of rare earth oxide added is 4.2 kg.
[0083] Example 12
[0084] A method for preparing a high-temperature resistant pigment differs from Example 8 in that the rare earth oxide is praseodymium oxide, the amount of pigment added is 40 kg, the amount of modified titanium dioxide added is 18 kg, and the amount of rare earth oxide added is 4.2 kg.
[0085] Example 13
[0086] A method for preparing a high-temperature resistant pigment differs from Example 8 in that the rare earth oxide is yttrium oxide, the amount of pigment added is 40 kg, the amount of modified titanium dioxide added is 18 kg, and the amount of rare earth oxide added is 4.2 kg.
[0087] Example 14
[0088] A method for preparing a high-temperature resistant pigment differs from Example 8 in that the rare earth oxide is europium oxide, the amount of pigment added is 40 kg, the amount of modified titanium dioxide added is 15 kg, and the amount of rare earth oxide added is 5 kg.
[0089] Comparative Example
[0090] Comparative Example 1
[0091] A method for preparing a high-temperature resistant pigment differs from Example 1 in that the modified titanium dioxide is replaced with an equal amount of titanium dioxide.
[0092] Comparative Example 2
[0093] A method for preparing a high-temperature resistant pigment differs from Example 1 in that the modified titanium dioxide is replaced with an equal amount of aluminum oxide.
[0094] Comparative Example 3
[0095] A method for preparing high-temperature resistant pigment differs from Example 1 in that, in the method for preparing modified titanium dioxide, titanium dioxide is replaced with an equal amount of aluminum oxide, while other components and amounts remain unchanged.
[0096] Comparative Example 4
[0097] A method for preparing high-temperature resistant pigments differs from Example 1 in that rare earth oxides are not added.
[0098] Comparative Example 5
[0099] A method for preparing a high-temperature resistant pigment differs from Example 1 in that the modified titanium dioxide is replaced with an equal amount of iron oxide.
[0100] Performance testing:
[0101] High temperature resistance: The high temperature resistant color powders prepared in Examples 1-14 and Comparative Examples 1-5 were sprayed onto PVC sheets, and the PVC sheets were heated in water at 100°C for 4 hours. After being removed, they were dried at 100°C for 2 hours, and the color change of the PVC sheets was observed.
[0102] The high-temperature resistant color powders prepared in Examples 1-14 and Comparative Examples 1-5 were sprayed onto PE sheets, and the PE sheets were heated in water at 100°C for 4 hours. After being removed, they were dried at 100°C for 2 hours, and the color change of the PE sheets was observed.
[0103] Weather resistance test: The high-temperature resistant color powders prepared in Examples 1-14 and Comparative Examples 1-5 were sprayed onto PVC sheets, and the PVC sheets were exposed to low sunlight for 3 days. The color change of the PVC sheets was then observed.
[0104] Based on the color change of the pigment on the surface of PVC and PE sheets, they are divided into four levels: Level I: no color change; Level II: basically no color change; Level III: slight color change on the surface; Level IV: significant color change on the surface; and Level V: complete color change on the surface.
[0105]
[0106] Based on the data comparison of Examples 1-3 and Comparative Examples 1-5, it can be seen that this application modifies the color powder by modifying titanium dioxide and rare earth oxides. Both modified titanium dioxide and rare earth oxides have good heat resistance. As stabilizers, rare earth oxides and modified titanium dioxide are uniformly distributed on the surface of the color powder under the action of dispersants, which can significantly improve the stability and dispersibility of the color powder. At the same time, it increases the interaction force between modified titanium dioxide and rare earth oxides and the surface of the color powder, making it less likely for modified titanium dioxide and rare earth oxides to fall off the surface of the color powder, thus improving the steric hindrance effect. The alkoxy groups in the coupling agent can protect the anhydride groups of maleic anhydride grafted onto polypropylene in modified titanium dioxide, thereby improving the compatibility between modified titanium dioxide and color powder, giving the color powder good high-temperature stability.
[0107] Based on the data comparison of Examples 3-5, it can be seen that modifying titanium dioxide by grafting maleic anhydride with polypropylene, tetraethyl orthosilicate, and silica sol, and immersing titanium dioxide in a mixture of maleic anhydride-grafted polypropylene, tetraethyl orthosilicate, and silica sol, allows tetraethyl orthosilicate to adhere to the surface of titanium dioxide, thereby reducing the specific surface area and pore volume of titanium dioxide. The anhydride groups of maleic anhydride-grafted polypropylene can improve the dispersibility of tetraethyl orthosilicate, thus serving as a bridge to enhance the adhesion and compatibility between titanium dioxide and tetraethyl orthosilicate.
[0108] According to the data comparison of Examples 5-8, this application pre-treats maleic anhydride-grafted polypropylene, mixes maleic anhydride-grafted polypropylene with iron black, and combines iron black with antioxidants to give maleic anhydride-grafted polypropylene good resistance to thermo-oxidative aging. This further improves the heat resistance of modified titanium dioxide when maleic anhydride-grafted polypropylene modifies titanium dioxide. Iron black is attached to titanium dioxide through maleic anhydride-grafted polypropylene, and modified titanium dioxide is then mixed with rare earth oxides and attached to the pigment. The mixture of multiple metal oxides can significantly improve the high temperature resistance and weather resistance of the pigment.
[0109] According to the data comparison of Examples 8-14, when the pigment, modified titanium dioxide and rare earth oxide are mixed in a specific weight ratio, the modified titanium dioxide and rare earth oxide adhere to the surface of the pigment, protecting it and making it difficult for ultraviolet rays to come into contact with the pigment, thus giving the pigment good weather resistance.
[0110] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A toner resistant to high temperature of 100°C, characterized by: It is made from the following raw materials in parts by weight: 20-60 parts color powder; 10-20 parts modified titanium dioxide; 2-8 parts rare earth oxides; Dispersant 5-15 parts; Coupling agent 2-6 parts; 10-20 parts water; the rare earth oxide includes one of lanthanum oxide and europium oxide; The modified titanium dioxide is prepared by mixing 15-20 parts by weight of titanium dioxide with 5-10 parts by weight of tetraethyl orthosilicate and 10-20 parts by weight of silica sol, stirring evenly, and then drying; then mixing with 10-20 parts by weight of maleic anhydride-grafted polypropylene and 20-40 parts by weight of ethanol, stirring, allowing to stand, drying and calcining to obtain the modified titanium dioxide. The maleic anhydride-grafted polypropylene is a pretreated maleic anhydride-grafted polypropylene. The preparation method of the pretreated maleic anhydride-grafted polypropylene is as follows: 20-40 parts by weight of maleic anhydride-grafted polypropylene, 2-6 parts by weight of antioxidant and 10-20 parts by weight of iron black are mixed and stirred, and then extruded and granulated to obtain the pretreated maleic anhydride-grafted polypropylene.
2. The toner of claim 1, wherein: The dispersant includes one of polyvinyl alcohol and polyethylene wax.
3. The toner of claim 1, wherein: The weight ratio of the 100℃ high-temperature resistant pigment, modified titanium dioxide, and rare earth oxide is 1:(0.42-0.45):(0.06-0.11).
4. The toner of claim 1, wherein: The particle size range of the modified titanium dioxide is 20-40 μm.
5. The toner of claim 1, wherein: The grafting rate of the maleic anhydride-grafted polypropylene is 1.45-1.89%.
6. A method for preparing a toner resistant to high temperature of 100°C, characterized by: The preparation of a high-temperature resistant color powder according to any one of claims 1-5 comprises the following steps: S1. Mixing coupling agent and water evenly, then adding modified titanium dioxide and rare earth oxide and stirring evenly to obtain a mixture; S2. Adding dispersant and color powder to the mixture and stirring evenly, then grinding and drying to obtain a high-temperature resistant color powder.
7. The method for preparing the toner powder resistant to 100℃ high temperature according to claim 6, characterized in that: The temperature during the stirring process in step S2 is 70-90℃.