Titanium dioxide with good dispersibility and preparation method thereof
Through the combination of rutile titanium dioxide, antioxidant, dispersant, coupling agent and leveling agent, the problems of poor dispersion and high energy consumption of titanium dioxide are solved, and high dispersion and low energy consumption of titanium dioxide suitable for coatings and plastics are prepared.
Patent Information
- Application Number
- CN202510556155.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2025-08-22
AI Technical Summary
In actual applications, traditional titanium dioxide has poor dispersion, high production energy consumption and unfriendly environment, and photocatalytic activity may trigger photodegradation of polymer substrates, limiting its application in areas with strict weather resistance.
Combined rutile titanium dioxide with antioxidants, dispersants, coupling agents, stabilizers and leveling agents are used to prepare composite titanium dioxide through stirring and drying processes to improve its dispersion and stability and reduce energy consumption.
The prepared titanium dioxide has good dispersion, whiteness and hiding power, is suitable for large-scale production, and is environmentally friendly. It is suitable for coatings and plastics industries.
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of titanium dioxide, and particularly relates to titanium dioxide with good dispersibility and a preparation method thereof. Background Art
[0002] Titanium dioxide, scientifically known as titanium dioxide, is the world's most widely used white pigment. With its excellent hiding power, tinting strength, chemical stability, and weather resistance, it occupies an important position in coatings, plastics, papermaking, inks, chemical fibers, and other fields. However, traditional titanium dioxide still has significant limitations in practical applications: First, titanium dioxide particles have a high surface energy and are prone to agglomeration, resulting in poor dispersion, especially in organic systems where uniform distribution is difficult, directly affecting its optical properties and efficiency. Second, titanium dioxide production relies on titanium resources, while high-grade titanium ore reserves are limited. Traditional sulfuric acid or chlorination processes consume high energy and generate large amounts of waste, increasing environmental pressure. Third, the photocatalytic activity of titanium dioxide itself may trigger photodegradation of polymer substrates, limiting its application in areas with stringent weather resistance requirements.
[0003] Therefore, the development of a composite titanium dioxide with high dispersibility, low cost and environmental friendliness has become an urgent need in the industry. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a titanium dioxide with good dispersibility, which has high whiteness, strong hiding power and good stability; another technical problem to be solved by the present invention is to provide a method for preparing titanium dioxide with good dispersibility, which has a simple production process, low energy consumption and is suitable for large-scale production.
[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:
[0006] A titanium dioxide with good dispersibility is composed of the following components by weight: 80-100 parts of rutile titanium dioxide, 0.5-1.0 parts of antioxidant, 1-2 parts of dispersant, 4-6 parts of coupling agent, 0.2-0.4 parts of stabilizer, 0.2-0.5 parts of leveling agent and 90-100 parts of water.
[0007] Furthermore, the composition by weight is as follows: 90 parts of rutile titanium dioxide, 0.8 parts of antioxidant, 1.5 parts of dispersant, 5 parts of coupling agent, 0.3 parts of stabilizer, 0.4 parts of leveling agent, and 100 parts of water.
[0008] Furthermore, the antioxidant is selected from one or more of butylated hydroxytoluene and dilauryl thiodipropionate.
[0009] Furthermore, the dispersant is selected from one or more of sodium pyrophosphate dodecahydrate, sodium dodecylbenzenesulfonate, and triethanolamine.
[0010] Furthermore, the coupling agent is KH-550.
[0011] Furthermore, the stabilizer is selected from one or more of magnesium stearate and calcium stearate.
[0012] Furthermore, the leveling agent is polydimethylsiloxane.
[0013] Furthermore, the preparation method of the titanium dioxide with good dispersibility and the preparation method thereof comprises the following steps:
[0014] (1) mixing an antioxidant, a stabilizer, a leveling agent, and water to obtain a first mixture;
[0015] (2) Mixing rutile white powder with a dispersant and a coupling agent, adding the first mixture after mixing evenly, mixing and stirring, and drying to obtain composite titanium dioxide.
[0016] Furthermore, in step (1), the stirring speed is 500 r / min and the stirring time is 5-10 min.
[0017] Furthermore, in step (2), the stirring speed is 1000 r / min and the stirring time is 30 min.
[0018] Compared with the prior art, the present invention has the following advantages:
[0019] (1) The present invention uses rutile titanium dioxide, which has uniform particles and good stability and glossiness. Adding a dispersant for dispersion can further improve the stability, dispersibility and glossiness of titanium dioxide.
[0020] (2) The coupling agent used in the present invention can effectively improve the adhesion of titanium dioxide, and the leveling agent used PDMS can reduce surface tension, promote leveling, and at the same time improve scratch resistance. In combination with the antioxidant, it can give titanium dioxide better weather resistance and gloss.
[0021] (3) The production process of the present invention is simple and has low energy consumption. The coupling agent and dispersant are used together to prevent the powder from agglomerating, which affects the whiteness and hiding power of the final product and leads to poor product performance. At the same time, the titanium dioxide prepared by this application can be used in the coating industry or the plastics industry. DETAILED DESCRIPTION
[0022] The present invention will be further illustrated below with reference to specific examples. The examples are implemented based on the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.
[0023] In the following examples, the particle size of rutile titanium dioxide is 0.2-0.4 μm, and the particle size of anatase titanium dioxide is 0.1-0.3 μm.
[0024] Example 1
[0025] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0026] (1) 0.5 parts of butylated hydroxytoluene, 0.2 parts of magnesium stearate, 0.2 parts of polydimethylsiloxane, and 90 parts of water were mixed, added to a blender, and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0027] (2) 80 parts of rutile titanium dioxide, 1.5 parts of triethanolamine and 4 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0028] Example 2
[0029] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0030] (1) 0.5 parts of butylated hydroxytoluene, 0.5 parts of dilauryl thiodipropionate, 0.2 parts of magnesium stearate, 0.2 parts of calcium stearate, 0.5 parts of polydimethylsiloxane and 110 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0031] (2) 100 parts of rutile titanium dioxide, 2 parts of triethanolamine and 6 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0032] Example 3
[0033] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0034] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0035] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0036] Example 4
[0037] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0038] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0039] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium dodecylbenzenesulfonate and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0040] Example 5
[0041] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0042] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0043] (2) 90 parts of rutile titanium dioxide, 1.5 parts of triethanolamine and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0044] Example 6
[0045] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0046] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0047] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 4 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0048] Example 7
[0049] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0050] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.3 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0051] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0052] Example 8
[0053] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0054] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.3 parts of magnesium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0055] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0056] Comparative Example 1
[0057] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0058] (1) 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane, and 100 parts of water were mixed, added to a blender, and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0059] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0060] Comparative Example 2
[0061] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0062] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0063] (2) After 90 parts of rutile titanium dioxide and 5 parts of KH-550 are mixed evenly, the mixture is added to the first mixture and stirred continuously at a stirring speed of 1000 r / min for 30 min. The mixture is dried at 70° C. for 1 h to obtain composite titanium dioxide.
[0064] Comparative Example 3
[0065] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0066] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.4 parts of polydimethylsiloxane, and 100 parts of water were mixed, added to a blender, and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0067] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0068] Comparative Example 4
[0069] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0070] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate and 100 parts of water were mixed, and the mixture was added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0071] (2) 90 parts of rutile titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0072] Comparative Example 5
[0073] A method for preparing titanium dioxide with good dispersibility comprises the following steps:
[0074] (1) 0.5 parts of butylated hydroxytoluene, 0.3 parts of dilauryl thiodipropionate, 0.15 parts of magnesium stearate, 0.15 parts of calcium stearate, 0.4 parts of polydimethylsiloxane and 100 parts of water were mixed, added to a blender and stirred at a stirring speed of 500 r / min for 5-10 minutes to obtain a first mixture;
[0075] (2) 90 parts of anatase titanium dioxide, 1.5 parts of sodium pyrophosphate dodecahydrate, and 5 parts of KH-550 were mixed evenly, and then added to the first mixture and continued to stir at a stirring speed of 1000 r / min for 30 minutes. The mixture was dried at 70°C for 1 hour to obtain composite titanium dioxide.
[0076] The performance parameters of the composite titanium dioxide prepared in Examples 1-6 and Comparative Examples 1-5 are shown in Table 1 below.
[0077] Table 1 Performance parameters of composite titanium dioxide prepared in Examples 1-6 and Comparative Examples 1-4
[0078]
[0079]
[0080] As can be seen from Table 1, the main application properties of the composite titanium dioxide prepared in Examples 1-8 of the present application, including whiteness, sieve residue, oil absorption, hiding power, 105° volatile matter, and dispersibility, are better than those of Comparative Examples 1-4, indicating that the titanium dioxide has good whiteness, sieve residue, oil absorption, hiding power, 105° volatile matter, and dispersibility.
[0081] Comparing Example 3 with Comparative Example 2, it can be seen that after the addition of the dispersant, the dispersibility and whiteness of the titanium dioxide are increased, indicating that the dispersant can improve the dispersion degree of titanium dioxide; comparing Examples 1-8 with Comparative Example 1, it can be seen that after the addition of the antioxidant and the dispersant, the hiding power is significantly increased, indicating that the antioxidant and the dispersant work synergistically to increase the gloss and hiding power of titanium dioxide; rutile titanium dioxide is selected as the titanium dioxide, because it has good gloss and whiteness itself, and has better whiteness after being combined with the stabilizer and the dispersant; comparing Example 3 with Comparative Example 3, it can be seen that the addition of the stabilizer helps to enhance the whiteness and hiding power of titanium dioxide; comparing Example 3 with Comparative Example 5, it can be seen that anatase titanium dioxide has more surface hydroxyl groups, may be easier to agglomerate, and has worse dispersibility than rutile type, and anatase titanium dioxide has stronger photocatalytic activity, which may lead to an increase in volatile matter content.
[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A titanium dioxide with good dispersibility, characterized by: The composition is as follows by weight: 80-100 parts of rutile titanium dioxide, 0.5-1.0 parts of antioxidant, 1-2 parts of dispersant, 4-6 parts of coupling agent, 0.2-0.4 parts of stabilizer, 0.2-0.5 parts of leveling agent and 90-110 parts of water.
2. The titanium dioxide with good dispersibility according to claim 1, characterized in that: The composition by weight is as follows: 90 parts of rutile titanium dioxide, 0.8 parts of antioxidant, 1.5 parts of dispersant, 5 parts of coupling agent, 0.3 parts of stabilizer, 0.4 parts of leveling agent, and 100 parts of water.
3. The titanium dioxide with good dispersibility according to claim 1, characterized in that: The antioxidant is selected from one or more of butylated hydroxytoluene and dilauryl thiodipropionate.
4. The titanium dioxide with good dispersibility according to claim 1, characterized in that: The dispersant is selected from one or more of sodium pyrophosphate dodecahydrate, sodium dodecylbenzenesulfonate, and triethanolamine.
5. The titanium dioxide with good dispersibility according to claim 1, characterized in that: The coupling agent is KH-550.
6. The titanium dioxide with good dispersibility according to claim 1, characterized in that: The stabilizer is selected from one or more of magnesium stearate and calcium stearate.
7. The titanium dioxide with good dispersibility according to claim 1, characterized in that: The leveling agent is polydimethylsiloxane.
8. The method for preparing the titanium dioxide with good dispersibility according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) mixing an antioxidant, a stabilizer, a leveling agent, and water to obtain a first mixture; (2) Mixing rutile titanium dioxide with a dispersant and a coupling agent, adding the first mixture after mixing evenly, mixing, stirring, and drying to obtain composite titanium dioxide.
9. The method for preparing titanium dioxide with good dispersibility according to claim 8, characterized in that: In the step (1), the stirring speed is 500 r / min and the stirring time is 5-10 min.
10. The method for preparing titanium dioxide with good dispersibility according to claim 8, characterized in that: In the step (2), the stirring speed is 1000 r / min and the stirring time is 30 min.