A highly weather-resistant, scratch-resistant hand feel additive and its preparation process

Abstract

This invention relates to a highly weather-resistant, scratch-resistant, and smooth-feeling additive and its preparation process, belonging to the field of coating additives technology. The formulation of the scratch-resistant and smooth-feeling additive is as follows (by weight): 10-20 parts of silicone-modified acrylic resin, 3-5 parts of modified silica, 2-3 parts of maleic anhydride-grafted Fischer-Tropsch wax, 1-2 parts of light stabilizer, 0.5-0.7 parts of light absorber, 0.2-0.4 parts of polyether-modified polysiloxane, and 30-40 parts of propylene glycol methyl ether acetate. The smooth-feeling additive obtained by the formulation and preparation process of this invention possesses high weather resistance, scratch resistance, and a delicate, smooth feel.

Description

Technical Field

[0001] This invention belongs to the field of coating additives technology, and relates to a highly weather-resistant, scratch-resistant, and hand-feeling additive and its preparation process. Background Technology

[0002] As high-end industrial products increasingly demand higher standards for appearance and durability, coatings not only need vibrant and long-lasting colors, but also excellent scratch resistance to withstand daily wear and tear, and a smooth and comfortable feel to enhance the user experience. Furthermore, for products used outdoors, the coating must be able to withstand harsh climatic conditions such as ultraviolet radiation, high temperature and humidity, and thermal cycling over extended periods to prevent problems such as chalking, cracking, loss of gloss, and discoloration.

[0003] Currently, most feel-enhancing additives on the market are mainly composed of silicone or wax-based substances. Silicone-based additives can provide a smooth feel, but they often lack weather resistance and are prone to degradation under ultraviolet radiation, leading to loss of feel and potential coating defects. On the other hand, some wax-based additives have good scratch resistance, but they feel dry and significantly affect the gloss of the paint film. How to organically combine weather resistance, scratch resistance, and a smooth feel is a challenge in existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a highly weather-resistant, scratch-resistant, and smooth hand feel additive and its preparation process, which features high weather resistance, scratch resistance, and a delicate and smooth hand feel.

[0005] The objective of this invention can be achieved through the following technical solutions: A highly weather-resistant, scratch-resistant, and smooth-feeling additive, wherein the additive is formulated as follows (by weight): 10-20 parts silicone-modified acrylic resin, 3-5 parts modified silica, 2-3 parts maleic anhydride-grafted Fischer-Tropsch wax, 1-2 parts light stabilizer, 0.5-0.7 parts light absorber, 0.2-0.4 parts polyether-modified polysiloxane, and 30-40 parts propylene glycol methyl ether acetate. The modified silica is prepared as follows: S1-1: Disperse nano-silica in an ethanol solution with a mass fraction of 90-95%, adjust the pH to 4.5-5 with acetic acid, add γ-glycidyl etheroxypropyltrimethoxysilane, stir at 60-70 °C for 1-2 h, wash with ethanol and dry to obtain powder A; S1-2: Disperse powder A in toluene, add lactide monomer, glycidyl methacrylate and stannous octoate, stir at 120~140 ℃ for 2~3 h under nitrogen protection, wash with methanol and vacuum dry at 60~80 ℃ for 12 h to obtain powder B; S1-3: Disperse powder B in an ethanol solution with a mass fraction of 90-95%, add tridecafluorooctyltriethoxysilane, stir for 10-30 min, add triethylamine, heat to 65-75 ℃ and continue stirring for 2-4 h, wash with ethanol and place at 60-80 ℃ for vacuum drying for 12 h to obtain the modified silica.

[0006] As a preferred embodiment of the present invention, the amount of γ-glycidyl etheroxypropyltrimethoxysilane added in S1-1 is 3-5% of the mass of nano-silica.

[0007] As a preferred embodiment of the present invention, the molar ratio of lactide monomer, glycidyl methacrylate and stannous octoate in S1-2 is (50~200):1:0.05.

[0008] As a preferred embodiment of the present invention, the amount of tridecafluorooctyltriethoxysilane added in S1-3 is 1-3% of the mass of powder A.

[0009] As a preferred embodiment of the present invention, the amount of triethylamine added in S1-3 is 1-2% of the mass of tridecafluorooctyltriethoxysilane.

[0010] As a preferred embodiment of the present invention, the preparation method of the maleic anhydride-grafted Fischer-Tropsch wax is as follows. Under nitrogen protection, Fischer-Tropsch wax was added to toluene, heated to 100-110°C and stirred for 30-60 min, maleic anhydride was added and stirred for 30-60 min, dicumyl peroxide was added and stirring was continued for 2-3 h, washed with acetone and dried to obtain the maleic anhydride-grafted Fischer-Tropsch wax.

[0011] As a preferred embodiment of the present invention, the amount of maleic anhydride added is 3 to 8% of the mass of Fischer-Tropsch wax.

[0012] As a preferred embodiment of the present invention, the amount of dicumyl peroxide added is 0.2-1% of the mass of Fischer-Tropsch wax.

[0013] As a preferred embodiment of the present invention, the light stabilizer is a hindered amine light stabilizer, and the light absorber is one or more of 2,4-dihydroxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorobenzotriazole and 2,4,6-tris(4-butoxy-2-hydroxyphenyl)-1,3,5-triazine.

[0014] A preparation process for a highly weather-resistant, scratch-resistant, and smooth-feeling additive, the specific steps of which are as follows: S10-1: Add half the mass of propylene glycol methyl ether acetate, light stabilizer, light absorber and polyether modified polysiloxane to the material tank, and stir at 400~600 rpm for 10~20 min to obtain premix A; S10-2: Add the remaining propylene glycol methyl ether acetate and organosilicon modified acrylic resin to another material tank, stir at 600~800 rpm for 10~20 min, add modified silica and maleic anhydride grafted Fischer wax in sequence, increase the speed to 1000~1500 rpm, and continue to disperse for 35~45 min to obtain slurry B; S10-3: Add premix A to slurry B and stir at 800~1000 rpm for 20~30 min to obtain the high weather-resistant anti-scratch feel additive.

[0015] Grafting γ-glycidyl etheroxypropyltrimethoxysilane onto the surface of nano-silica introduces epoxy groups, providing active sites for subsequent reactions and improving the initial compatibility between the inorganic core and the organic system. Subsequently, epoxy ring-opening initiates the copolymerization of lactide and glycidyl methacrylate to form a polylactic acid-based copolymer soft shell. This shell is flexible, and the distributed GMA units within it provide additional epoxy active sites. Utilizing the hydroxyl or epoxy groups on the shell, a low surface energy fluorinated silane layer is constructed on the soft shell surface by reacting with tridecafluorooctyltriethoxysilane.

[0016] The nano-SiO2 core in modified silica provides extremely high hardness and modulus, effectively resisting the indentation and ploughing of sharp objects. The flexible PLA-based shell can undergo elastic deformation under external force, absorbing and dispersing impact energy and preventing crack propagation. When scratched, the deformation of the soft shell allows scratches to self-heal. The coating combines high hardness and high toughness, and its scratch resistance, abrasion resistance, and impact resistance are far superior to coatings that only add rigid fillers or rely solely on resin. The fluorosilane layer effectively blocks the penetration of corrosive media such as moisture, acids, alkalis, and salts, protecting the SiO2 core and PLA shell, and also delaying the attack of media on the resin matrix. The extremely high CF bond energy endows the surface with strong UV resistance and oxidation resistance. This fluorosilicone layer protects the internal PLA and resin, slowing down photoaging; and synergistically with light stabilizers and light absorbers in the formulation, it forms a multi-protection system, significantly improving the coating's gloss retention, anti-yellowing properties, and durability. Furthermore, the outermost fluorinated silane provides extremely low surface tension, giving the coating surface an excellent smooth and non-sticky feel. The fluorinated silane layer adheres to the flexible PLA shell, rather than a rigid surface, resulting in a smooth yet richly elastic feel, avoiding the dryness of pure wax powder.

[0017] Maleic anhydride-grafted Fischer-Tropsch wax significantly improves the compatibility of Fischer-Tropsch wax with silicone resins and modified silica, ensuring uniform and stable dispersion in the coating and preventing phase separation. Secondly, the introduced active groups can chemically bond with other components during curing, anchoring wax molecules within the cross-linked network. This solves problems such as short-lived smoothness, poor recoatability, and poor heat resistance caused by the easy migration and precipitation of traditional waxes, achieving a durable, scratch-resistant, and smooth feel. Furthermore, as a chemically bonded flexible lubricating point, it works synergistically with rigid fillers to provide lubrication and reduce the coefficient of friction under external forces, while also adapting to the elastic deformation of the substrate, giving the coating superior scratch resistance and microscopic self-healing capabilities.

[0018] The beneficial effects of this invention are: The modified silica prepared in this invention features a hard silica core that provides compressive strength, a flexible polylactic acid shell that imparts elasticity, absorbs impact, and enables microscopic self-healing of scratches, and an outermost fluorinated silane that contributes low surface energy, hydrophobic and oleophobic properties, and excellent UV aging resistance. These three elements work synergistically to give the coating high hardness, high toughness, long-lasting scratch resistance, and a silky smooth feel. Furthermore, the grafting of maleic anhydride with Fischer-Tropsch wax enhances compatibility with the remaining components and allows for chemical bonding during curing, ensuring long-lasting and stable functionality. This solves the problem of traditional coatings that struggle to simultaneously achieve wear resistance, a smooth feel, and weather resistance. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0020] It should be noted that, unless otherwise specified, the present invention does not specifically limit the source of the raw materials used in the following embodiments. Commercially available products or products prepared by conventional preparation methods that are well known to those skilled in the art can be used. Experimental methods that do not specify specific conditions are all conventional methods and conventional conditions well known in the art.

[0021] Example 1

[0022] A highly weather-resistant, scratch-resistant, and smooth-feeling additive, the formulation of which is as follows (by weight): 15 parts silicone-modified acrylic resin, 4 parts modified silica, 2.5 parts maleic anhydride-grafted Fischer wax, 1.5 parts hindered amine light stabilizer, 0.6 parts 2,4-dihydroxybenzophenone, 0.3 parts polyether-modified polysiloxane, and 35 parts propylene glycol methyl ether acetate. The modified silica is prepared as follows: S1-1: Disperse nano-silica in a 92% ethanol solution, adjust the pH to 4.8 with acetic acid, add 4% by weight of γ-glycidyl etheroxypropyltrimethoxysilane of nano-silica, stir at 65 °C for 1.5 h, wash with ethanol and dry to obtain powder A; S1-2: Powder A was dispersed in toluene, and lactide monomer, glycidyl methacrylate and stannous octoate were added. The molar ratio of lactide monomer, glycidyl methacrylate and stannous octoate was 120:1:0.05. The mixture was stirred at 130 °C for 2.5 h under nitrogen protection, washed with methanol and dried under vacuum at 70 °C for 12 h to obtain powder B. S1-3: Disperse powder B in a 92% ethanol solution, add 2% (by mass) of tridecafluorooctyltriethoxysilane of powder A, stir for 20 min, add 1.5% (by mass) of triethylamine of tridecafluorooctyltriethoxysilane, heat to 70℃ and continue stirring for 3 h, wash with ethanol and vacuum dry at 70℃ for 12 h to obtain the modified silica.

[0023] The preparation method of the maleic anhydride-grafted Fischer-Tropsch wax is as follows. Under nitrogen protection, Fischer-Tropsch wax was added to toluene, heated to 105°C and stirred for 45 min. Maleic anhydride of 5% by weight of Fischer-Tropsch wax was added and stirred for 45 min. Dicumyl peroxide of 0.5% by weight of Fischer-Tropsch wax was added and stirring was continued for 2.5 h. The mixture was washed with acetone and dried to obtain the maleic anhydride-grafted Fischer-Tropsch wax.

[0024] A preparation process for a highly weather-resistant, scratch-resistant, and smooth-feeling additive, the specific steps of which are as follows: S10-1: Add half the mass of propylene glycol methyl ether acetate, light stabilizer, light absorber and polyether modified polysiloxane to the material tank, and stir at 500 rpm for 15 min to obtain premix A; S10-2: Add the remaining propylene glycol methyl ether acetate and organosilicon modified acrylic resin to another material tank, stir at 700 rpm for 15 min, add modified silica and maleic anhydride grafted Fischer wax in sequence, increase the speed to 1200 rpm, and continue to disperse for 40 min to obtain slurry B. S10-3: Add premix A to slurry B and stir at 900 rpm for 25 min to obtain the high weather-resistant anti-scratch feel additive.

[0025] Example 2

[0026] A highly weather-resistant, scratch-resistant, and smooth-feeling additive, the formulation of which is as follows (by weight): 10 parts silicone-modified acrylic resin, 3 parts modified silica, 2 parts maleic anhydride-grafted Fischer wax, 1 part hindered amine light stabilizer, 0.5 parts 2-hydroxy-4-n-octyloxybenzophenone, 0.2 parts polyether-modified polysiloxane, and 30 parts propylene glycol methyl ether acetate. The modified silica is prepared as follows: S1-1: Disperse nano-silica in a 90% ethanol solution, adjust the pH to 4.5 with acetic acid, add 3% by weight of γ-glycidyl etheroxypropyltrimethoxysilane to the nano-silica, stir at 60 °C for 1 h, wash with ethanol and dry to obtain powder A; S1-2: Powder A is dispersed in toluene, and lactide monomer, glycidyl methacrylate and stannous octoate are added, wherein the molar ratio of lactide monomer, glycidyl methacrylate and stannous octoate is 50:1:0.05. The mixture is stirred at 120 °C for 2 h under nitrogen protection, washed with methanol and dried under vacuum at 60 °C for 12 h to obtain powder B. S1-3: Disperse powder B in a 90% ethanol solution, add 1% (by mass) of tridecafluorooctyltriethoxysilane of powder A, stir for 10 min, add 1% (by mass) of triethylamine of tridecafluorooctyltriethoxysilane, heat to 65℃ and continue stirring for 2 h, wash with ethanol and vacuum dry at 60℃ for 12 h to obtain the modified silica.

[0027] The preparation method of the maleic anhydride-grafted Fischer-Tropsch wax is as follows. Under nitrogen protection, Fischer-Tropsch wax was added to toluene, heated to 100°C and stirred for 30 min. Maleic anhydride of 3% by weight of Fischer-Tropsch wax was added and stirred for 30 min. Dicumyl peroxide of 0.2% by weight of Fischer-Tropsch wax was added and stirred for 2 h. The mixture was washed with acetone and dried to obtain the maleic anhydride-grafted Fischer-Tropsch wax.

[0028] A preparation process for a highly weather-resistant, scratch-resistant, and smooth-feeling additive, the specific steps of which are as follows: S10-1: Add half the mass of propylene glycol methyl ether acetate, light stabilizer, light absorber and polyether modified polysiloxane to the material tank, and stir at 400 rpm for 10 min to obtain premix A; S10-2: Add the remaining propylene glycol methyl ether acetate and organosilicon modified acrylic resin to another material tank, stir at 600 rpm for 10 min, add modified silica and maleic anhydride grafted Fischer wax in sequence, increase the speed to 1000 rpm, and continue to disperse for 35 min to obtain slurry B. S10-3: Add premix A to slurry B and stir at 800 rpm for 20 min to obtain the high weather-resistant anti-scratch feel additive.

[0029] Example 3

[0030] A highly weather-resistant, scratch-resistant, and smooth-feeling additive, the formulation of which is as follows (by weight): 20 parts silicone-modified acrylic resin, 5 parts modified silica, 3 parts maleic anhydride-grafted Fischer wax, 2 parts hindered amine light stabilizer, 0.7 parts 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorobenzotriazole and 2,4,6-tris(4-butoxy-2-hydroxyphenyl)-1,3,5-triazine, 0.4 parts polyether-modified polysiloxane, and 40 parts propylene glycol methyl ether acetate. The modified silica is prepared as follows: S1-1: Disperse nano-silica in a 95% ethanol solution, adjust the pH to 5 with acetic acid, add 5% by weight of γ-glycidyl etheroxypropyltrimethoxysilane to the nano-silica, stir at 70 °C for 2 h, wash with ethanol and dry to obtain powder A. S1-2: Powder A is dispersed in toluene, and lactide monomer, glycidyl methacrylate and stannous octoate are added, wherein the molar ratio of lactide monomer, glycidyl methacrylate and stannous octoate is 200:1:0.05. The mixture is stirred at 140 °C for 3 h under nitrogen protection, washed with methanol and dried under vacuum at 80 °C for 12 h to obtain powder B. S1-3: Disperse powder B in a 95% ethanol solution, add 3% (by mass) of tridecafluorooctyltriethoxysilane of powder A, stir for 30 min, add 2% (by mass) of triethylamine of tridecafluorooctyltriethoxysilane, heat to 75℃ and continue stirring for 4 h, wash with ethanol and vacuum dry at 80℃ for 12 h to obtain the modified silica.

[0031] The preparation method of the maleic anhydride-grafted Fischer-Tropsch wax is as follows. Under nitrogen protection, Fischer-Tropsch wax was added to toluene, heated to 110°C and stirred for 60 min. Maleic anhydride of 8% by weight of Fischer-Tropsch wax was added and stirred for 60 min. Dicumyl peroxide of 1% by weight of Fischer-Tropsch wax was added and stirred for 3 h. The mixture was washed with acetone and dried to obtain the maleic anhydride-grafted Fischer-Tropsch wax.

[0032] A preparation process for a highly weather-resistant, scratch-resistant, and smooth-feeling additive, the specific steps of which are as follows: S10-1: Add half the mass of propylene glycol methyl ether acetate, light stabilizer, light absorber and polyether modified polysiloxane to the material tank, and stir at 600 rpm for 20 min to obtain premix A; S10-2: Add the remaining propylene glycol methyl ether acetate and organosilicon modified acrylic resin to another material tank, stir at 800 rpm for 20 min, add modified silica and maleic anhydride grafted Fischer wax in sequence, increase the speed to 1500 rpm, and continue to disperse for 45 min to obtain slurry B. S10-3: Add premix A to slurry B and stir at 1000 rpm for 30 min to obtain the high weather-resistant anti-scratch feel additive.

[0033] Comparative Example 1 The difference between this comparative example and Example 1 is that unmodified silica is used instead of modified silica; otherwise, they are the same as in Example 1.

[0034] Comparative Example 2 The difference between this comparative example and Example 1 is that the preparation of modified silica does not involve step S1-2, while the rest is the same as in Example 1.

[0035] Comparative Example 3 The difference between this comparative example and Example 1 is that the preparation of modified silica does not involve steps S1-3, while the rest is the same as in Example 1.

[0036] Comparative Example 4 The difference between this comparative example and Example 1 is that Fischer-Tropsch wax is used instead of maleic anhydride-grafted Fischer-Tropsch wax; otherwise, they are the same as in Example 1.

[0037] Performance testing Coating preparation: Add the additives of all examples and comparative examples at an addition amount of 1 wt% to the acrylic polyurethane varnish, mix evenly, and then spray onto ABS plastic board. After curing at room temperature for 7 days, the coating is tested.

[0038] Scratch resistance test: steel wool reciprocating friction (load 500g, stroke 10cm, frequency 30 times / minute, 1000 times of friction), and then the gloss retention rate was measured using a gloss meter.

[0039] Weather resistance test: QUV accelerated aging was performed according to ASTM G154 standard. The cycling conditions were 60℃ UV irradiation for 8 hours and 50℃ condensation for 4 hours. The gloss retention rate was measured at 0h and 1000h.

[0040] Hand feel performance test: The friction coefficient meter was used for measurement. The lower the value, the smoother the hand feel. The specific experimental data are summarized in the table below.

[0041]

[0042] As can be seen from the above embodiments and comparative data, adding the additives prepared in this invention to the coating can make the coating have high weather resistance, scratch resistance and a delicate and smooth feel.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are still within the scope of the present invention.

Claims

1. A highly weather-resistant, scratch-resistant hand-feeling additive, characterized in that, The anti-scratch feel additive has the following formulation, by weight: 10-20 parts silicone-modified acrylic resin, 3-5 parts modified silica, 2-3 parts maleic anhydride-grafted Fischer wax, 1-2 parts light stabilizer, 0.5-0.7 parts light absorber, 0.2-0.4 parts polyether-modified polysiloxane, and 30-40 parts propylene glycol methyl ether acetate. The modified silica is prepared as follows: S1-1: Disperse nano-silica in an ethanol solution with a mass fraction of 90-95%, adjust the pH to 4.5-5 with acetic acid, add γ-glycidyl etheroxypropyltrimethoxysilane, stir at 60-70 °C for 1-2 h, wash with ethanol and dry to obtain powder A; S1-2: Disperse powder A in toluene, add lactide monomer, glycidyl methacrylate and stannous octoate, stir at 120~140 ℃ for 2~3 h under nitrogen protection, wash with methanol and vacuum dry at 60~80 ℃ for 12 h to obtain powder B; S1-3: Disperse powder B in an ethanol solution with a mass fraction of 90-95%, add tridecafluorooctyltriethoxysilane, stir for 10-30 min, add triethylamine, heat to 65-75 ℃ and continue stirring for 2-4 h, wash with ethanol and place at 60-80 ℃ for vacuum drying for 12 h to obtain the modified silica.

2. The high weather-resistant and scratch-resistant hand-feel additive according to claim 1, characterized in that, The amount of γ-glycidyl etheroxypropyltrimethoxysilane added in S1-1 is 3-5% of the mass of nano-silica.

3. The high weather-resistant and scratch-resistant hand-feel additive according to claim 1, characterized in that, The molar ratio of lactide monomer, glycidyl methacrylate and stannous octoate in S1-2 is (50~200):1:0.

05.

4. The high weather-resistant and scratch-resistant hand-feel additive according to claim 1, characterized in that, The amount of tridecafluorooctyltriethoxysilane added in S1-3 is 1-3% of the mass of powder A.

5. The high weather-resistant and scratch-resistant hand-feel additive according to claim 1, characterized in that, The amount of triethylamine added in S1-3 is 1-2% of the mass of tridecafluorooctyltriethoxysilane.

6. The high weather-resistant and scratch-resistant hand-feel additive according to claim 1, characterized in that, The preparation method of the maleic anhydride-grafted Fischer-Tropsch wax is as follows. Under nitrogen protection, Fischer-Tropsch wax was added to toluene, heated to 100-110°C and stirred for 30-60 min, maleic anhydride was added and stirred for 30-60 min, dicumyl peroxide was added and stirring was continued for 2-3 h, washed with acetone and dried to obtain the maleic anhydride-grafted Fischer-Tropsch wax.

7. The high weather-resistant and scratch-resistant hand-feel additive according to claim 6, characterized in that, The amount of maleic anhydride added is 3-8% of the mass of Fischer-Tropsch wax.

8. The high weather-resistant and scratch-resistant hand-feel additive according to claim 6, characterized in that, The amount of dicumyl peroxide added is 0.2-1% of the mass of Fischer-Tropsch wax.

9. The high weather-resistant and scratch-resistant hand-feel additive according to claim 1, characterized in that, The light stabilizer is a hindered amine light stabilizer, and the light absorber is one or more of 2,4-dihydroxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorobenzotriazole and 2,4,6-tris(4-butoxy-2-hydroxyphenyl)-1,3,5-triazine.

10. A preparation process for a high weather-resistant, scratch-resistant hand-feel additive as described in any one of claims 1 to 9, characterized in that, The specific steps of the preparation process are as follows. S10-1: Add half the mass of propylene glycol methyl ether acetate, light stabilizer, light absorber and polyether modified polysiloxane to the material tank, and stir at 400~600 rpm for 10~20 min to obtain premix A; S10-2: Add the remaining propylene glycol methyl ether acetate and organosilicon modified acrylic resin to another material tank, stir at 600~800 rpm for 10~20 min, add modified silica and maleic anhydride grafted Fischer wax in sequence, increase the speed to 1000~1500 rpm, and continue to disperse for 35~45 min to obtain slurry B; S10-3: Add premix A to slurry B and stir at 800~1000 rpm for 20~30 min to obtain the high weather-resistant anti-scratch feel additive.

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