Anti-ultraviolet carbon black color paste as well as preparation method and application thereof

Abstract

The invention relates to the field of pigment chemical industry and discloses uvioresistant carbon black color paste. The uvioresistant carbon black color paste comprises the following components in parts by weight: 20-30 parts of carbon black, 35-40 parts of xylene, 10-15 parts of lignin, 6-10 parts of a catalyst, 15-25 parts of oleoresin, 50-80 parts of an organic solvent, 4-6 parts of a silane coupling agent, 5-10 parts of an uvioresistant auxiliary agent, 3-6 parts of a wetting agent and 5-10 parts of a dispersing agent. The silane coupling agent is used for modifying the carbon black lignin composite particles, hydrophilic groups are combined with the surfaces of the composite particles, hydrophobic groups face outwards, a hydrophobic covering layer is formed, and therefore the hydrophobicity of the composite particles is improved. In addition, the anti-ultraviolet additive further improves the anti-ultraviolet property of the color paste and also improves the stability of the carbon black color paste, so that the prepared carbon black color paste is coated on the surface of the artificial leather, and the anti-ultraviolet property and the waterproof property of the artificial leather can be obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pigment chemical industry, and particularly to an anti-ultraviolet carbon black paste, a preparation method and application thereof. BACKGROUND

[0002] Lignin is a kind of electron-rich polyaromatic organic compound, which is usually formed by bonding of three phenylpropylene monomers (p-hydroxyphenylpropylene, m-hydroxyphenylpropylene and m-methyl-p-hydroxyphenylpropylene). It has stable structure, rich aromatic ring and hydroxyl structure, which endows it with strong biological activity. As one of the naturally abundant renewable polymers, lignin has attracted much attention due to its unique properties. In recent years, lignin-based anti-ultraviolet functional materials have attracted much attention due to their different degrees of methoxyl-rich aromatic structure, high-efficiency ultraviolet absorption capacity and excellent antioxidant performance. These characteristics make lignin an excellent protective material, which can be used in various fields, including building materials, paint coatings, plastic products and textiles, etc. It shows great potential in resisting ultraviolet radiation, prolonging the service life of materials, protecting human health, etc.

[0003] Carbon black is an amorphous carbon, which is obtained by incomplete combustion or thermal decomposition of natural gas, heavy oil, fuel oil and other organic matters under insufficient air. According to the use, there are two major categories of pigment carbon black and rubber carbon black. As an important chemical raw material and black pigment, carbon black has been widely used in rubber, ink, paint, plastic, dry battery and chemical fiber fields, which can improve the strength, anti-ultraviolet, light shielding, anti-static, conductive and other properties of the base material.

[0004] Color paste is a high-concentration pigment solution, which is commonly used for formulating ink, paint and pigment products. Its main components include pigment, solvent and dispersant. Pigment is responsible for providing the desired color effect, solvent is used to dissolve pigment and adjust the concentration, and dispersant ensures uniform dispersion of pigment in the solution. The role of color paste is to ensure that the pigment can be uniformly dispersed in the base material to achieve the consistency and stability of product color. Through color paste, precise formulation of various colors and shades can be achieved to meet the color requirements of different products.

[0005] Artificial leather, also known as synthetic leather or imitation leather, is a synthetic material designed to mimic the appearance and texture of natural leather. It is usually composed of various synthetic materials such as polyurethane, polyvinyl chloride, polyester, etc., processed through special techniques. Artificial leather has good softness, wear resistance and stain resistance, and is relatively easy to clean, commonly used in the production of shoes, bags, sofas, clothing and other products. Compared with natural leather, the production process of artificial leather is more environmentally friendly, the cost is lower, and more styles and color choices can be achieved, but the existing artificial leather has poor anti-ultraviolet property and waterproof property. SUMMARY

[0006] To address the problems mentioned in the background art, the present invention aims to provide an anti-ultraviolet carbon black paste, its preparation method, and its application, thereby greatly improving the anti-ultraviolet and waterproof properties of the artificial leather prepared therefrom.

[0007] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: an anti-ultraviolet carbon black paste, characterized in that it comprises the following components in parts by weight: 20-30 parts carbon black, 35-40 parts xylene, 10-15 parts lignin, 6-10 parts catalyst, 15-25 parts oily resin, 50-80 parts organic solvent, 4-6 parts silane coupling agent, 5-10 parts anti-ultraviolet additive, 3-6 parts wetting agent, and 5-10 parts dispersant.

[0008] According to claim 1, the UV-resistant carbon black paste is characterized in that the carbon black is obtained by thermal cracking of natural gas and oil, with a carbon content (%) ≥ 98.5 and a particle size of 130-470 nm.

[0009] As an improvement, the catalyst is one or more of concentrated sulfuric acid, phosphoric acid, and copper sulfate;

[0010] As an improvement, the oily resin is one or more of polyurethane resin, polyacrylic acid resin, and polyamide resin;

[0011] As an improvement, the organic solvent is one or more of xylene, acetone, methyl pyruvate, propanol, and naphtha;

[0012] As an improvement, the silane coupling agent is one or more of vinyltriethoxysilane, methoxytrimethoxysilane, propoxytrimethoxysilane, and polymethylsiloxane;

[0013] As an improvement, the UV-resistant additive is one or more of zinc oxide, titanium dioxide, aluminum oxide, zirconium dioxide, and vanadium pentoxide, with a particle size of 30-50 nm.

[0014] As an improvement, the wetting agent is one or more of dimethicone, methyl methacrylate, and propanolamine, and the dispersant is one or more of sodium dodecylbenzenesulfonate, sodium xylenesulfonate, and stearic acid.

[0015] A method for preparing an anti-UV carbon black paste, characterized by comprising the following steps:

[0016] S1. Carbon black particles are added to xylene and ultrasonically dispersed at room temperature for 20 minutes to ensure uniform dispersion of carbon black particles in xylene, thus preparing a carbon black dispersion.

[0017] S2. Add lignin and catalyst to the carbon black dispersion in S1. Stir magnetically at 800 rpm for 6-10 hours at 60-80℃. During the heating and stirring process, the hydroxyl groups on the surface of the carbon black particles and the carboxyl groups in the lignin undergo a condensation reaction to form stable ester bonds, achieving a tight composite of lignin and carbon black particles. This reaction utilizes the chemical affinity between the hydroxyl groups on the surface of the carbon black particles and the carboxyl groups in the lignin, thereby forming a strong chemical bond between the two. Subsequently, the mixture is separated by centrifugation, washed with anhydrous ethanol, and dried at 50-70℃ for 24 hours to obtain core-shell structured carbon black-lignin composite particles.

[0018] S3. Centrifuge the mixture in S2, wash with anhydrous ethanol, and dry at 50-70℃ for 24 hours to obtain core-shell structured carbon black lignin composite particles.

[0019] S4. The oily resin and organic solvent are first wetted under stirring conditions to obtain the first wetted slurry;

[0020] S5. The first wetting slurry is mixed with carbon black lignin composite particles, silane coupling agent, UV stabilizer, wetting agent and dispersant under stirring conditions to obtain the second wetting slurry.

[0021] S6. The second wetting slurry is added to the high-pressure homogenizer for third wetting to obtain the third wetting slurry.

[0022] S7. Grind the third wetting slurry to obtain an anti-ultraviolet carbon black slurry.

[0023] The application of an anti-UV carbon black paste in artificial leather involves coating the surface of the artificial leather with the prepared carbon black paste. After the carbon black paste is coated, the artificial leather is placed in a well-ventilated place to dry and cure, so as to ensure that the carbon black paste adheres firmly to the surface of the artificial leather and forms a uniform and stable coating.

[0024] The beneficial effects of this invention are as follows: Carbon black paste prepared from carbon black lignin composite particles modified with silane coupling agents exhibits improved hydrophobicity and UV resistance. Simultaneously, the UV-absorbing functional groups in lignin, such as phenols, ketones, and conjugated double bonds, enhance the UV resistance of the carbon black paste. Furthermore, the addition of UV-resistant additives further improves the UV resistance and stability of the carbon black paste, extending its shelf life. These carbon black lignin composite particles play a crucial role in the preparation of carbon black paste, endowing it with excellent UV resistance and hydrophobic properties. These improved properties make it more suitable for applications in various outdoor and high-humidity environments. Therefore, using this novel carbon black paste to coat artificial leather broadens the application range of artificial leather. Such artificial leather can resist UV radiation and moisture erosion and can be used in multiple fields such as automotive interiors, outdoor furniture, and footwear. Detailed Implementation

[0025] The present invention is illustrated below with specific embodiments, which are not intended to limit the scope of the invention.

[0026] Example 1

[0027] The components, by weight fraction, are as follows: 20 parts carbon black, 35 parts xylene, 15 parts lignin, 8 parts catalyst, 20 parts oily resin, 50 parts organic solvent, 5 parts silane coupling agent, 10 parts UV stabilizer, 5 parts wetting agent, and 5 parts dispersant.

[0028] The specific steps are as follows:

[0029] (1) Add 20 parts of carbon black particles with a particle size of 150 nm to 35 parts of xylene and ultrasonically disperse for 20 minutes to make the carbon black particles uniformly dispersed in xylene to obtain a carbon black dispersion.

[0030] (2) Add 15 parts of lignin and 8 parts of catalyst to the carbon black dispersion in (1), and magnetically stir at 800 rpm for 10 hours at 80°C. After the composite is completed, centrifuge at 4000 rpm 3-5 times until solid-liquid separation, wash several times with anhydrous ethanol until the upper layer solution is clear, and then place the sample in an environment of 60°C to dry for 24 hours. Grind to obtain core-shell structured carbon black@lignin composite particles.

[0031] (3) The prepared carbon black@lignin composite particles are mixed with 20 parts of oily resin, 50 parts of organic solvent, 5 parts of silane coupling agent, 10 parts of UV-resistant additive with a particle size of 30nm, 5 parts of wetting agent and 5 parts of dispersant to prepare UV-resistant carbon black paste.

[0032] (4) Finally, apply the UV-resistant carbon black paste to the surface of the artificial leather. After the carbon black paste is applied, place the artificial leather in a well-ventilated place to dry and cure, and obtain UV-resistant artificial leather.

[0033] Example 2:

[0034] The components are as follows by weight: 20 parts carbon black, 35 parts xylene, 15 parts lignin, 8 parts catalyst, 20 parts oily resin, 50 parts organic solvent, 5 parts silane coupling agent, 5 parts wetting agent, and 5 parts dispersant.

[0035] The specific steps are as follows:

[0036] 20 parts of carbon black particles with a particle size of 150 nm were added to 35 parts of xylene and ultrasonically dispersed for 20 minutes to ensure that the carbon black particles were uniformly dispersed in xylene, thus obtaining a carbon black dispersion.

[0037] 15 parts of lignin and 8 parts of catalyst were added to the carbon black dispersion in (1), and the mixture was magnetically stirred at 800 rpm for 10 hours at 80°C. After the composite was completed, the mixture was centrifuged at 4000 rpm 3-5 times until solid-liquid separation was achieved. The mixture was washed several times with anhydrous ethanol until the upper layer was clear. The sample was then dried at 60°C for 24 hours and ground to obtain core-shell structured carbon black@lignin composite particles.

[0038] The prepared carbon black@lignin composite particles were mixed with 20 parts of oily resin, 50 parts of organic solvent, 5 parts of silane coupling agent, 5 parts of wetting agent, and 5 parts of dispersant to prepare an anti-ultraviolet carbon black paste.

[0039] Finally, the UV-resistant pigment is coated onto the surface of the artificial leather. After the carbon black pigment is coated, the artificial leather is placed in a well-ventilated place to dry and cure, resulting in UV-resistant carbon black artificial leather.

[0040] Example 3:

[0041] The components are as follows by weight: 20 parts carbon black, 35 parts xylene, 5 parts silane coupling agent, 20 parts oily resin, 50 parts organic solvent, 10 parts UV stabilizer, 5 parts wetting agent, and 5 parts dispersant.

[0042] The specific steps are as follows:

[0043] Twenty parts of carbon black particles with a particle size of 150 nm were added to 35 parts of xylene and ultrasonically dispersed for 20 minutes to ensure uniform dispersion of the carbon black particles in the xylene. Then, 5 parts of silane coupling agent were gradually added, and the mixture was magnetically stirred at 800 rpm for 2 hours at 90-100°C to obtain a carbon black dispersion.

[0044] The carbon black dispersion was centrifuged 3-5 times until solid-liquid separation was achieved. The sample was washed several times with anhydrous ethanol until the upper layer was clear. The sample was then dried at 60°C for 24 hours to obtain modified carbon black particles.

[0045] The prepared modified carbon black particles were mixed with 20 parts of oily resin, 50 parts of organic solvent, 10 parts of UV-resistant additive with a particle size of 30 nm, 5 parts of wetting agent, and 5 parts of dispersant to prepare UV-resistant carbon black paste.

[0046] Finally, apply the UV-resistant carbon black paste to the surface of the artificial leather. After the carbon black paste is applied, place the artificial leather in a well-ventilated place to dry and cure, thus obtaining UV-resistant artificial leather.

[0047] UV resistance test

[0048] Examples 1 and 2, and Comparative Examples 3 were tested using a UV-1000F fabric UV protection tester to measure T(UVA)AV and UPF. The standard used was GB / T18830-2009. When the UPF of a sample is greater than 40 and T(UVA)AV is less than 5%, it can be called a UV protection product. The test results are shown in Table 1.

[0049] Waterproofing test

[0050] Examples 1, 2, and 3 were placed in a testing apparatus consisting of a spray device, a metal nozzle, and a sample holder for waterproofing testing. The standard used was GB / T40936-2021, with five levels. The higher the level, the better the waterproofing. The test results are shown in Table 1.

[0051] Table 1 Performance Test Table for Artificial Leather

[0052]

[0053] Compared to Examples 2 and 3, this invention proposes a novel method. This method first uses carbon black particles as the core, then coats them with a layer of lignin to obtain carbon black-lignin composite particles. By modifying the carbon black-lignin composite particles with a silane coupling agent, not only is the compatibility between the carbon black particles and lignin improved, but the hydrophobicity of the composite particles is also enhanced. Lignin itself contains functional groups that absorb ultraviolet light, giving the prepared carbon black-lignin composite particles higher UV resistance. Furthermore, the addition of metal oxide UV-resistant additives during the preparation of the carbon black paste further improves the UV resistance of the carbon black paste. Therefore, the UV resistance and water resistance of the artificial leather coated with UV-resistant carbon black paste are significantly improved, meeting the required standards. This innovative method provides an effective way to improve the performance of artificial leather and lays the foundation for its wider application.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Within the technical scope disclosed in the present invention, any person skilled in the art can make equivalent substitutions or changes based on the technical solutions and innovative ideas of the present invention, and these changes and substitutions should be considered to be included within the scope of protection of the present invention.

Claims

1. A UV-resistant carbon black paste, characterized in that, The components, by weight, are as follows: 20-30 parts carbon black, 35-40 parts xylene, 10-15 parts lignin, 6-10 parts catalyst, 15-25 parts oily resin, 50-80 parts organic solvent, 4-6 parts silane coupling agent, 5-10 parts UV stabilizer, 3-6 parts wetting agent, and 5-10 parts dispersant.

2. The UV-resistant carbon black paste according to claim 1, characterized in that, The carbon black is obtained by thermal cracking of natural gas and oil, with a carbon content (%) ≥ 98.5 and a particle size of 130-470 nm.

3. The UV-resistant carbon black paste according to claim 1, characterized in that, The catalyst is one or more of concentrated sulfuric acid, phosphoric acid, and copper sulfate.

4. The UV-resistant carbon black paste according to claim 1, characterized in that, The oily resin is one or more of polyurethane resin, polyacrylic acid resin, and polyamide resin.

5. The UV-resistant carbon black paste according to claim 1, characterized in that, The organic solvent is one or more of xylene, acetone, methyl pyruvate, propanol, and naphtha.

6. The UV-resistant carbon black paste according to claim 1, characterized in that, The silane coupling agent is one or more of vinyltriethoxysilane, methoxytrimethoxysilane, propoxytrimethoxysilane, and polymethylsiloxane.

7. The UV-resistant carbon black paste according to claim 1, characterized in that, The UV-resistant additive is one or more of zinc oxide, titanium dioxide, aluminum oxide, zirconium dioxide, and vanadium pentoxide, with a particle size of 30-50 nm.

8. The UV-resistant carbon black paste according to claim 1, characterized in that, The wetting agent is one or more of dimethyl silicone oil, methyl methacrylate, and propanolamine, and the dispersant is one or more of sodium dodecylbenzene sulfonate, sodium xylene sulfonate, and stearic acid.

9. The method for preparing an anti-UV carbon black paste according to claim 1, characterized in that, Includes the following steps: S1. Carbon black particles are added to xylene and ultrasonically dispersed at room temperature for 20 minutes to ensure uniform dispersion of carbon black particles in xylene, thus preparing a carbon black dispersion. S2. Add lignin and catalyst to the carbon black dispersion of S1, and magnetically stir at 800 rpm for 6-10 hours at 60-80℃. S3. Centrifuge the mixture in S2, wash with anhydrous ethanol, and dry at 50-70℃ for 24 hours to obtain core-shell structured carbon black lignin composite particles. S4. The oily resin and organic solvent are first wetted under stirring conditions to obtain the first wetted slurry; S5. The first wetting slurry is mixed with carbon black lignin composite particles, silane coupling agent, UV stabilizer, wetting agent and dispersant under stirring conditions to obtain the second wetting slurry. S6. The second wetting slurry is added to the high-pressure homogenizer for third wetting to obtain the third wetting slurry. S7. Grind the third wetting slurry to obtain an anti-ultraviolet carbon black slurry.

10. The application of the UV-resistant carbon black paste according to claim 1 in artificial leather, characterized in that, The prepared charcoal black paste is applied to the surface of the artificial leather. After the charcoal black paste is applied, the artificial leather is placed in a well-ventilated place to dry and cure, so as to ensure that the charcoal black paste adheres firmly to the surface of the artificial leather and forms a uniform and stable coating.

Images