Whitening type composite modifier as well as preparation method and application thereof
By preparing a whitening composite modifier, the problems of insignificant modification effect and poor stability of inorganic powders were solved, and the performance of inorganic powders in the fields of plastics, coatings and ceramics was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-03-31
AI Technical Summary
Existing inorganic powder modification methods are not effective, have poor stability, and are environmentally unfriendly, which limits their application in the industrial field.
A whitening composite modifier, including titanium dioxide, fluorescent whitening agent, aluminate coupling agent, titanate coupling agent, stearic acid, and dispersant, is used to improve the whiteness and dispersibility of inorganic powders and enhance their compatibility and stability with organic matrices through a mixing and drying process.
It significantly improves the whiteness and dispersibility of inorganic powders, enhances their application performance in plastics, coatings and ceramics, and improves product quality.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of inorganic material modification technology, and in particular to a whitening composite modifier, its preparation method, and its application. Background Technology
[0002] Inorganic powders have wide applications in many industrial fields, such as plastics, rubber, coatings, and ceramics. However, many inorganic powders have limited whiteness, which to some extent restricts their application effects and product quality. To improve the whiteness and performance of inorganic powders, effective modification treatment is necessary.
[0003] Currently, common methods for modifying inorganic powders have some shortcomings, such as insignificant modification effects, poor stability, and environmental unfriendliness. Therefore, developing a high-efficiency, environmentally friendly, and high-performance whitening composite modifier for inorganic powder modification has significant practical importance and application value. Summary of the Invention
[0004] The purpose of this invention is to provide a whitening composite modifier, its preparation method and application. This composite modifier can significantly improve the whiteness of inorganic powders, improve their dispersibility and stability, and expand their application in related fields.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides a whitening composite modifier, comprising the following raw materials in parts by weight: 55-65 parts titanium dioxide, 2-5 parts fluorescent whitening agent, 15-25 parts aluminate coupling agent, 5-10 parts titanate coupling agent, 10-20 parts stearic acid, 2-5 parts dispersant, and 1-2 parts antioxidant.
[0006] Preferably, the titanium dioxide is composed of anatase titanium dioxide.
[0007] Preferably, the fluorescent whitening agent is one or more of benzoxazole fluorescent whitening agents and stilbene fluorescent whitening agents.
[0008] Preferably, the dispersant comprises polyethylene glycol or sodium polyacrylate.
[0009] Preferably, the antioxidant includes butylated hydroxytoluene or tert-butylhydroquinone.
[0010] This invention provides a method for preparing the whitening composite modifier described in the above technical solution, comprising the following steps: Stearic acid, aluminate coupling agent and titanate coupling agent are mixed to obtain the first mixed slurry; The first mixed slurry is mixed with a fluorescent whitening agent to obtain a second mixed slurry; The second mixed slurry is mixed with titanium dioxide and a dispersant to obtain a third mixed slurry; The third mixed slurry is mixed with an antioxidant and then dried to obtain a whitening composite modifier.
[0011] This invention provides the application of the whitening composite modifier described in the above technical solution or the whitening composite modifier prepared by the preparation method described in the above technical solution in the modification of inorganic powders.
[0012] Preferably, the inorganic powder includes calcium carbonate, magnesium hydroxide, barium sulfate, talc, or kaolin.
[0013] Preferably, the method of application includes: mixing inorganic powder with a whitening composite modifier and modifying it to obtain modified inorganic powder.
[0014] Preferably, the mass ratio of the whitening composite modifier to the inorganic powder is 3~8:100; the modification temperature is 80~120℃, and the time is 15~30min.
[0015] This invention provides a whitening composite modifier using titanium dioxide as a carrier. It employs a fluorescent whitening agent to improve whiteness, and utilizes aluminate coupling agents, titanate coupling agents, and stearic acid to enhance the compatibility and dispersibility of the powder with the organic matrix. Stearic acid also acts as a solvent to improve the dispersion and compatibility of the components. Simultaneously, antioxidants are added to improve the stability of the composite modifier and reduce the oxidation reaction of the additives at high temperatures. This invention ensures good dispersion and compatibility by using the above-mentioned components, allowing each component to exert its specific modifying effect individually and synergistically. The whitening composite modifier provided by this invention can be applied to the modification of various inorganic powders. Inorganic powders treated with this whitening composite modifier show significantly improved whiteness, dispersibility, and stability.
[0016] Inorganic powders modified with the whitening composite modifier of this invention can effectively improve the gloss and mechanical properties of plastic products when used in plastics; enhance the hiding power and weather resistance of coatings when used in coatings; and help improve the whiteness and quality of ceramic products in the ceramics field. Detailed Implementation
[0017] Unless otherwise specified, all raw materials or reagents used in this invention are commercially available products well known in the art.
[0018] This invention provides a whitening composite modifier, comprising the following raw materials in parts by weight: 55-65 parts titanium dioxide, 2-5 parts fluorescent whitening agent, 15-25 parts aluminate coupling agent, 5-10 parts titanate coupling agent, 10-20 parts stearic acid, 2-5 parts dispersant, and 1-2 parts antioxidant.
[0019] The raw materials for preparing the whitening composite modifier provided by this invention, by weight, include 55-65 parts of titanium dioxide, more preferably 56-62 parts, and even more preferably 59-60 parts. The titanium dioxide is anatase titanium dioxide. In this invention, titanium dioxide serves as the carrier of the composite modifier.
[0020] Based on the mass fraction of the titanium dioxide, the raw materials for preparing the whitening composite modifier provided by the present invention include 2-5 parts of fluorescent whitening agent, more preferably 3-4 parts, wherein the fluorescent whitening agent is preferably one or more of benzoxazole fluorescent whitening agents and stilbene fluorescent whitening agents. When the fluorescent whitening agent is two or more of the above-mentioned types, the present invention does not have a special limitation on the ratio of different types of fluorescent whitening agents, and any ratio is acceptable.
[0021] The present invention does not specifically limit the model of the benzoxazole fluorescent whitening agent and the stilbene fluorescent whitening agent, and any corresponding type of fluorescent whitening agent well known in the art is acceptable; in the embodiments of the present invention, the model of the benzoxazole fluorescent whitening agent is preferably Subang OB; the model of the stilbene fluorescent whitening agent is preferably Chuanhua VBL.
[0022] Based on the mass fraction of the titanium dioxide, the raw materials for preparing the whitening composite modifier provided by the present invention include 15-25 parts of aluminate coupling agent, more preferably 16-22 parts, and even more preferably 18-20 parts. The present invention does not specifically limit the type of aluminate coupling agent; commercially available products well-known in the art are acceptable. In the embodiments of the present invention, the aluminate coupling agent specifically originates from Jiangxi Juxing Composite Materials Co., Ltd., and is model AB-4.
[0023] Based on the mass fraction of the titanium dioxide, the raw materials for preparing the whitening composite modifier provided by the present invention include 5-10 parts of titanate coupling agent, more preferably 6-8 parts. The present invention does not specifically limit the type of titanate coupling agent; any commercially available product well-known in the art is acceptable. In the embodiments of the present invention, the titanate coupling agent is specifically TMC-980, sourced from Anhui Tianchang Green Chemical Additives Factory.
[0024] In this invention, the aluminate coupling agent and titanate coupling agent are used to improve the compatibility and dispersibility of the powder with the organic matrix (organic polymer matrix, such as thermoplastic polymer, thermosetting polymer or rubber).
[0025] Based on the mass fraction of the titanium dioxide, the raw materials for preparing the whitening composite modifier provided by the present invention include 10-20 parts of stearic acid, more preferably 12-18 parts, and even more preferably 15-16 parts. In the present invention, stearic acid serves to improve the compatibility and dispersibility of the powder with the organic matrix, and acts as a solvent during the preparation of the composite modifier to better disperse and compatibility with other components.
[0026] Based on the mass fraction of titanium dioxide, the raw materials for preparing the whitening composite modifier provided by the present invention include 2-5 parts of dispersant, more preferably 2-3 parts, wherein the dispersant preferably includes polyethylene glycol or sodium polyacrylate. In the present invention, the role of the dispersant is to promote better dispersion and compatibility of the components.
[0027] Based on the mass fraction of the titanium dioxide, the raw materials for preparing the whitening composite modifier provided by this invention include 1-2 parts of antioxidant, preferably butylated hydroxytoluene or tert-butylhydroquinone. In this invention, the antioxidant serves to improve the stability of the composite modifier and reduce the oxidation reaction of the additives at high temperatures.
[0028] This invention provides a method for preparing the whitening composite modifier described in the above technical solution, comprising the following steps: Stearic acid, aluminate coupling agent and titanate coupling agent are mixed to obtain the first mixed slurry; The first mixed slurry is mixed with a fluorescent whitening agent to obtain a second mixed slurry; The second mixed slurry is mixed with titanium dioxide and a dispersant to obtain a third mixed slurry; The third mixed slurry is mixed with an antioxidant and then dried to obtain a whitening composite modifier.
[0029] In this invention, stearic acid, aluminate coupling agent, and titanate coupling agent are sequentially added to a reactor at 100°C. After complete melting, the mixture is stirred for 10 minutes to obtain a first mixed slurry. A fluorescent whitening agent is then uniformly added to the first mixed slurry and stirred for 10 minutes to obtain a second mixed slurry. Titanium dioxide is then uniformly added to the second mixed slurry and stirred until homogeneous. A dispersant is then added, and stirring continues for 40 minutes to obtain a third mixed slurry. An antioxidant is then uniformly added to the third mixed slurry and stirred for 10 minutes. The reaction product is then pumped into a sprayer and cooled and dried with cold air to obtain a composite modifier. This invention does not impose specific limitations on the stirring and cooling / drying conditions; adjustments can be made according to actual needs.
[0030] This invention provides the application of the whitening composite modifier described in the above technical solution or the whitening composite modifier prepared by the preparation method described in the above technical solution in the modification of inorganic powders.
[0031] In this invention, the inorganic powder preferably includes calcium carbonate, magnesium hydroxide, barium sulfate, talc, or kaolin.
[0032] In this invention, the preferred method of application includes: mixing inorganic powder with a whitening composite modifier and modifying it to obtain modified inorganic powder.
[0033] In this invention, the mass ratio of the whitening composite modifier to the inorganic powder is preferably 3~8:100, more preferably 4~6:100, and even more preferably 5:100; the modification temperature is preferably 80~120℃, more preferably 90~110℃, and even more preferably 100℃; the modification time is preferably 15~30min, and even more preferably 20~25min; the modification is preferably carried out under grinding or stirring conditions. This invention does not have any special limitations on the grinding or stirring, and can be carried out according to processes well known in the art.
[0034] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.
[0035] Titanium dioxide is sourced from Longbai Group Co., Ltd. Benzooxazole fluorescent whitening agent is Subang OB; stilbene fluorescent whitening agent is Chuanhua VBL; The aluminate coupling agent, model AB-4, is sourced from Jiangxi Juxing Composite Materials Co., Ltd. The titanate coupling agent is specifically TMC-980, which comes from Tianchang Green Chemical Additives Factory in Anhui Province. Stearic acid is sourced from Hangzhou Zanyu Oils & Fats Technology Co., Ltd. Dispersant: Polyethylene glycol, molecular weight 200~500; Sodium polyacrylate, model AB-2, molecular weight 3000-5000, sourced from Jiangxi Juxing Polymer Materials Co., Ltd. Antioxidants: Butylated hydroxytoluene and tert-butylhydroquinone are sourced from Zhejiang Shengxiao Chemical Co., Ltd. Example 1 The whitening composite modifier provided in this embodiment is composed of the following raw materials in parts by weight: 59 parts titanium dioxide, 2 parts Subang OB, 15 parts aluminate coupling agent AB-4, 5 parts titanate coupling agent TMC-980, 15 parts stearic acid, 2 parts polyethylene glycol, and 2 parts butylated hydroxytoluene.
[0036] Preparation method: Stearic acid, aluminate coupling agent, and titanate coupling agent are added to a reactor at 100℃ and completely melted. After stirring for 10 minutes, a first mixed slurry is obtained. Plastic OB is uniformly added to the first mixed slurry and stirred for 10 minutes to obtain a second mixed slurry. Titanium dioxide is uniformly added to the second mixed slurry and stirred until homogeneous. Polyethylene glycol is added and stirring is continued for 40 minutes to obtain a third mixed slurry. Butylated hydroxytoluene is uniformly added to the third mixed slurry and stirred for 10 minutes to obtain the product. The reacted product is pumped into a sprayer and cooled and dried with cold air to obtain a composite modifier.
[0037] Example 2
[0038] The whitening composite modifier provided in this embodiment is composed of the following raw materials in parts by weight: 65 parts titanium dioxide, 2 parts Transfar VBL, 15 parts aluminate coupling agent AB-4, 5 parts titanate coupling agent TMC-980, 10 parts stearic acid, 2 parts sodium polyacrylate, and 1 part butylated hydroxytoluene.
[0039] The preparation method is the same as in Example 1.
[0040] Example 3
[0041] The whitening composite modifier provided in this embodiment is composed of the following raw materials in parts by weight: 55 parts titanium dioxide, 1 part Subang OB, 1 part Chuanhua VBL, 15 parts aluminate coupling agent AB-4, 5 parts titanate coupling agent TMC-980, 20 parts stearic acid, 2 parts polyethylene glycol, and 1 part tert-butylhydroquinone.
[0042] The preparation method is the same as in Example 1.
[0043] Comparative Example 1
[0044] Jiangxi Guangyuan Chemical Co., Ltd. produces unmodified calcium carbonate, model CC-3000.
[0045] Comparative Example 2
[0046] Jiangxi Guangyuan Chemical Co., Ltd. produced unmodified magnesium hydroxide, model GY-3000.
[0047] Comparative Example 3
[0048] Jiangxi Guangyuan Chemical Co., Ltd. produced unmodified barium sulfate, model GY-3000.
[0049] Comparative Example 4
[0050] The only difference from Example 1 is that the composition of the raw materials used in the preparation is as follows: 10 parts of aluminate coupling agent AB-4 and 5 parts of titanate coupling agent TMC-980 were used, and the rest were the same as in Example 1.
[0051] Application Example 1
[0052] The composite modifier prepared in Example 1 was used to modify calcium carbonate powder (calcium carbonate CC-3000 in Comparative Example 1). The composite modifier and calcium carbonate were treated at 100°C for 30 min under high-speed mixing with a mass ratio of 5:100 to obtain the modified powder.
[0053] Application Example 2
[0054] The composite modifier prepared in Example 2 was used to modify magnesium hydroxide (magnesium hydroxide GY-3000 in Comparative Example 2). The composite modifier and magnesium hydroxide were treated at 100°C for 30 min under high-speed mixing with a mass ratio of 5:100 to obtain the modified powder.
[0055] Application Example 3
[0056] The composite modifier prepared in Example 3 was used to modify barium sulfate (barium sulfate GY-3000 in Comparative Example 3). The composite modifier and barium sulfate were treated at 100°C for 30 min under high-speed mixing with a mass ratio of 5:100 to obtain the modified powder.
[0057] Application Example 4
[0058] The composite modifier prepared in Comparative Example 4 was used to modify barium sulfate (barium sulfate GY-3000 in Comparative Example 3). The composite modifier and barium sulfate were treated at 100°C for 30 min under high-speed mixing with a mass ratio of 5:100 to obtain the modified powder.
[0059] Performance testing
[0060] The whiteness and oil absorption value of the modified inorganic powders in Application Examples 1-4 were tested, and the whiteness and oil absorption value of the unmodified powders in Comparative Examples 1-3 were also tested. The whiteness was tested according to the method of standard GB / T23774-2009, and the oil absorption value was tested according to the method of standard GB / T 19281-2014. The specific test results are shown in Table 1.
[0061] Table 1. Test results of modified powders in Application Examples 1-4 and unmodified powders in Comparative Examples 1-3.
[0062] Table 1 shows that the whiteness of calcium carbonate powder modified with the composite modifier of the present invention increased by 2% and the oil absorption value decreased; the whiteness of modified magnesium hydroxide increased by 1.8% and the oil absorption value decreased; and the whiteness of modified barium sulfate increased by 3% and the oil absorption value decreased. This indicates that the composite modifier of the present invention can improve the whiteness of inorganic powders, reduce the oil absorption value, and minimize moisture changes, indicating improved dispersibility and stability.
[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A whitening composite modifier, characterized in that, The preparation raw materials include the following parts by weight: 55-65 parts titanium dioxide, 2-5 parts fluorescent whitening agent, 15-25 parts aluminate coupling agent, 5-10 parts titanate coupling agent, 10-20 parts stearic acid, 2-5 parts dispersant, and 1-2 parts antioxidant.
2. The whitening composite modifier according to claim 1, characterized in that, The titanium dioxide is composed of anatase titanium dioxide.
3. The whitening composite modifier according to claim 1, characterized in that, The fluorescent whitening agent is one or more of benzoxazole fluorescent whitening agents and stilbene fluorescent whitening agents.
4. The whitening composite modifier according to claim 1, characterized in that, The dispersant includes polyethylene glycol or sodium polyacrylate.
5. The whitening composite modifier according to claim 1, characterized in that, The antioxidants include butylated hydroxytoluene or tert-butylhydroquinone.
6. A method for preparing the whitening composite modifier according to any one of claims 1 to 5, characterized in that, Includes the following steps: Stearic acid, aluminate coupling agent and titanate coupling agent are mixed to obtain the first mixed slurry; The first mixed slurry is mixed with a fluorescent whitening agent to obtain a second mixed slurry; The second mixed slurry is mixed with titanium dioxide and a dispersant to obtain a third mixed slurry; The third mixed slurry is mixed with an antioxidant and then dried to obtain a whitening composite modifier.
7. The application of the whitening composite modifier according to any one of claims 1 to 5 or the whitening composite modifier prepared by the preparation method according to claim 6 in the modification of inorganic powders.
8. The application according to claim 7, characterized in that, The inorganic powder includes calcium carbonate, magnesium hydroxide, barium sulfate, talc, or kaolin.
9. The application according to claim 7 or 8, characterized in that, The method of application includes: mixing inorganic powder with a whitening composite modifier, modifying it, and obtaining modified inorganic powder.
10. The application according to claim 9, characterized in that, The mass ratio of the whitening composite modifier to the inorganic powder is 3~8:100; the modification temperature is 80~120℃ and the time is 15~30min.