Multi-protection organic silicon leather and preparation method thereof

Abstract

The invention relates to the field of leather materials, and particularly discloses multi-protection organic silicon leather and a preparation method thereof. The multi-protection organic silicon leather comprises a surface layer, a middle layer, a base material and an antifouling layer, a bonding glue layer is coated between the middle layer and the base material, and the antifouling layer is located on the side, away from the middle layer, of the surface layer; the surface layer comprises the following raw materials in parts by weight: 40-60 parts of modified silicone rubber, 30-40 parts of glass powder, 2-5 parts of glass fibers, 2-5 parts of steel wires, 10-20 parts of a cross-linking agent, 10-15 parts of vinyl polysiloxane, 1-3 parts of an inhibitor, 0.5-2 parts of color paste and 0.1-3 parts of a catalyst; the modified silicone rubber raw materials comprise silicone rubber and silver-loaded nano silicon dioxide; through synergistic interaction of the components of all the layers, the organic silicon leather has a multi-protection effect.

Description

Technical Field

[0001] The present application relates to the field of leather materials, and in particular to a multi-protective silicone leather and a preparation method thereof. Background Art

[0002] With the improvement of people's living standards and the enhancement of environmental awareness, the demand for leather materials with both beautiful and durable characteristics is growing. Natural leather is widely used in the production of daily necessities due to its excellent natural properties such as soft texture, strong wear resistance, moisture absorption, breathability, warmth retention, shape retention and sound absorption and noise reduction. However, natural leather is easy to deform when wet, shrinks and hardens when dry, and is prone to mold and black spots. The maintenance cost is expensive and can no longer meet people's needs.

[0003] Silicone materials have excellent weather resistance, high and low temperature resistance, chemical corrosion resistance, biocompatibility and other characteristics. Silicone leather not only has the appearance and texture of traditional leather, but also has excellent properties such as waterproof and antifouling. It can be widely used in clothing, shoes and hats, luggage, home decoration and other fields. However, at present, silicone leather generally has the problem that the strength of the surface layer is weaker than that of PU synthetic leather, and the leather surface has high friction and cannot provide sufficient anti-puncture, wear-resistant and antibacterial protection, which limits the application of silicone leather. Summary of the invention

[0004] In order to improve the multi-layer protection performance of traditional silicone leather, the present application provides a multi-protection silicone leather and a preparation method thereof.

[0005] In a first aspect, the present application provides a multi-protection silicone leather, which adopts the following technical solution: A multi-protection organic silicon leather comprises a surface layer, an intermediate layer, a base material and an antifouling layer, wherein an adhesive layer is coated between the intermediate layer and the base material, and the antifouling layer is located on the side of the surface layer away from the intermediate layer; the surface layer comprises 40-60 parts of modified silicone rubber, 30-40 parts of glass powder, 2-5 parts of glass fiber, 2-5 parts of steel wire, 10-20 parts of crosslinking agent, 10-15 parts of vinyl polysiloxane, 1-3 parts of inhibitor, 0.5-2 parts of color paste and 0.1-3 parts of catalyst; the modified silicone rubber raw material comprises silicone rubber and silver-loaded nano-silicon dioxide.

[0006] By adopting the above technical solutions, introducing high-strength fillers such as glass fiber, glass powder, and steel wire into the surface layer can endow the silicone leather with good cut resistance, puncture resistance, and wear resistance, improve the overall strength of the silicone leather surface layer, and thus extend the service life of the leather. Using modified silicone rubber containing silver-loaded nano-silica in the surface layer and cross-linking it with other components such as vinyl polysiloxane can promote the firm binding of silver ion antibacterial components in the surface layer system, reduce the phenomenon of late shedding and precipitation of silver ion antibacterial components, and enable the surface layer to have a stable antibacterial effect. Compositing an anti-fouling layer on the surface of the surface layer can further enhance the anti-fouling effect of the silicone leather. By enhancing the protection effect of the silicone leather in all aspects, multiple protections are ultimately achieved.

[0007] Preferably, the preparation method of the modified silicone rubber includes the following specific steps: Mix silver nitrate and nano-silica to form a reaction solution, adjust the pH of the reaction solution to 6-8, heat it to 40-60°C for light-shielded reaction, and perform centrifugal washing and drying on the reaction solution to obtain silver-loaded nano-silica; Mix the silicone rubber and silver-loaded nano-silica evenly, then add a curing agent and mix. After vulcanization, the modified silicone rubber is obtained.

[0008] By adopting the above technical solutions, silver ions are loaded onto the surface of silica through the adsorption and chemical bonding of silver nitrate and silica, and then the silver-loaded silica is mixed and vulcanized with silicone rubber to cross-link the silicone rubber to form a three-dimensional network structure, enabling silver ions to stably and continuously release silver ions in the silicone rubber surface layer, playing a continuous antibacterial role. At the same time, nano-silica as a carrier can improve the hardness of the surface layer and the stability of silver ions in the surface layer, thereby improving the strength, wear resistance, and antibacterial persistence of the silicone leather.

[0009] Preferably, the mass ratio of silver nitrate to nano-silica in the silver-loaded nano-silica raw material is (0.5-0.8):1.

[0010] Preferably, the mass ratio of silicone rubber, silver-loaded nano-silica, and curing agent in the modified silicone rubber raw material is 50:(10-20):(1-2).

[0011] Preferably, the intermediate layer includes the following raw materials in parts by weight: 10-20 parts of vinyl silicone rubber, 30-40 parts of vinyl resin, 10-20 parts of cross-linking agent, 10-15 parts of magnesium hydroxide, 10-15 parts of aluminum hydroxide, 1-3 parts of inhibitor, 0.1-3 parts of catalyst, and 0.5-3 parts of organosilicon defoamer.

[0012] By adopting the above technical solutions, vinyl silicone rubber and vinyl resin synergistically enhance the performance, endowing the silicone leather with good flexibility, high and low temperature resistance, and weather resistance. They can improve the structural stability of the intermediate layer, reduce the damage to the leather caused by external impacts, and make the leather more durable. The synergistic effect of aluminum hydroxide and magnesium hydroxide can improve the flame retardancy of the leather and enhance the thermal stability of the silicone leather.

[0013] Preferably, the adhesive layer comprises the following raw materials in parts by weight: 50 - 60 parts of liquid glue, 10 - 20 parts of hydrogen-containing MQ resin, 10 - 20 parts of cross-linking agent, 10 - 15 parts of vinyl polysiloxane, 1 - 5 parts of propylene oxide resin, 0.1 - 3 parts of inhibitor, and 0.1 - 3 parts of catalyst.

[0014] By adopting the above technical solutions, the liquid glue cross-links with the hydrogen-containing MQ resin and vinyl polysiloxane, endowing the adhesive layer with good initial tack and bonding strength, enabling the layers of the leather to be tightly combined and avoiding delamination or peeling. Vinyl polysiloxane can also form chemical bonds with propylene oxide resin, improving the adhesion of the adhesive layer to the substrate material and the intermediate layer, and enhancing the elasticity and impact resistance of the adhesive layer.

[0015] Preferably, the antifouling layer comprises the following raw materials in parts by weight: 40 - 60 parts of silicone emulsion and 50 - 60 parts of silica.

[0016] By adopting the above technical solutions, the silicone emulsion can improve the hydrophobicity, weather resistance, and antifouling performance of the surface of the silicone leather, reducing the adhesion of water, oil, and other stains. The silica particles can increase the hardness and wear resistance of the antifouling layer, reducing surface scratches and abrasions. At the same time, the silica can also form a micro-nano rough surface, further enhancing the hydrophobicity and antifouling performance.

[0017] Preferably, the cross-linking agent is at least one of methyltrimethoxysilane, methyltriacetoxysilane, and methyltributanoneoxime silane; the inhibitor is at least one of ethynylcyclopropanol, 3-methyl-1-dodecyne-3-ol, alkynylsilane, and tetramethyldivinyldisiloxane; and the catalyst is one of organoplatinum complex catalyst, alcohol-modified chloroplatinic acid catalyst, and platinum-alkynyl complex catalyst.

[0018] In a second aspect, the present application provides a method for preparing a multi-protection silicone leather, adopting the following technical solutions: A method for preparing a multi-protection silicone leather, comprising the following specific steps: Mix modified silicone rubber, glass powder, glass fiber, steel wire, cross-linking agent, vinyl polysiloxane, inhibitor, color paste, and catalyst to form a surface layer mixture; Coat the release paper with the surface layer mixture and heat it for drying to obtain the surface layer. Coat the middle layer mixture on the surface of the surface layer and dry it to form the middle layer. Coat the adhesive layer mixture on the surface of the middle layer and then bond it to the substrate material, and dry it to form the adhesive layer. Peel off the release paper. Finally, spray the antifouling layer mixture on the side of the surface layer facing away from the middle layer to form the antifouling layer, thus obtaining the multi-protection silicone leather.

[0019] By adopting the above technical solution, through the synergistic effect of each layer of components, the strength, wear resistance, impact resistance and antibacterial properties of the silicone leather can be improved, and finally the effect of multi-protection can be achieved.

[0020] Preferably, the substrate material is one of ultra-high molecular weight polyethylene fiber, graphene and aramid fiber.

[0021] In summary, the present application has the following beneficial effects: 1. Since the present application introduces glass fiber, glass powder and high-strength steel wire fillers into the surface layer, it can endow the silicone leather with better overall strength, and promote the silicone leather to have better anti-cutting, anti-piercing and wear-resistant properties. Use the modified silicone rubber containing silver-loaded nano-silica in the surface layer and carry out cross-linking reaction with other components such as vinyl polysiloxane to improve the long-lasting and stable antibacterial effect of the surface layer. Enhance the protection effect of the silicone leather in all aspects, and finally achieve multi-protection.

[0022] 2. In the present application, silver ions are loaded in silica, and then the silver-ion-loaded silica is vulcanized and cross-linked with silicone rubber to form a three-dimensional network structure, enhancing the stability of silver ions in the surface layer system, and promoting silver ions to stably and continuously release silver ions in the silicone rubber surface layer, playing a role of continuous antibacterial. Specific Embodiments

[0023] The following further elaborates on the present application with reference to embodiments.

[0024] All raw materials in the embodiments can be obtained commercially.

[0025] Preparation Example of Modified Silicone Rubber Preparation Example 1 The preparation method of the modified silicone rubber includes the following specific steps: S1: Mix the 0.07 mol / L silver nitrate solution with nano-silica, stir evenly to form a reaction solution. The mass ratio of silver nitrate to nano-silica in the reaction solution is 0.7:1, the particle size of nano-silica is 10 - 20 nm, adjust the pH of the reaction solution to 7 with ammonia water, heat it to 50 °C and react in the dark for 10 h. Centrifuge, wash and dry the reaction solution to obtain silver-loaded nano-silica.

[0026] S2: The silicone rubber and silver-loaded nano-silicon dioxide are mixed evenly, and then the curing agent organic tin T-12 is added and mixed. The mass ratio of the silicone rubber, the silver-loaded nano-silicon dioxide and the curing agent is 50:15:1.5. After vulcanization, the modified silicone rubber is obtained.

[0027] Preparation Example 2 The difference between Preparation Example 2 and Preparation Example 1 is that the mass ratio of silicone rubber, silver-loaded nano-silicon dioxide and curing agent in the modified silicone rubber raw material is 50:10:1.

[0028] Preparation Example 3 The difference between Preparation Example 3 and Preparation Example 1 is that the mass ratio of silicone rubber, silver-loaded nano-silicon dioxide and curing agent in the modified silicone rubber raw material is 50:20:2.

[0029] Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 1 is that the mass ratio of silver nitrate to nano-silicon dioxide in the modified silicone rubber raw material is 0.5:1.

[0030] Preparation Example 5 The difference between Preparation Example 5 and Preparation Example 1 is that the mass ratio of silver nitrate to nano-silicon dioxide in the modified silicone rubber raw material is 0.8:1. Example

[0031] Example 1 This embodiment provides a multi-protection organic silicon leather, including a surface layer, an intermediate layer, a base material, and an antifouling layer, wherein an adhesive layer is coated between the intermediate layer and the base material, and the antifouling layer is located on the side of the surface layer away from the intermediate layer. The surface layer includes the following raw materials in parts by weight: 50 kg of modified silicone rubber, 35 kg of glass powder, 3 kg of glass fiber, 4 kg of steel wire, 15 kg of crosslinking agent, 13 g of vinyl polysiloxane, 2 kg of inhibitor, 1.4 kg of color paste, and 1.3 kg of catalyst.

[0032] The middle layer includes the following raw materials in parts by weight: 15 kg of vinyl silicone rubber, 35 kg of vinyl resin, 15 kg of cross-linking agent, 13 kg of magnesium hydroxide, 13 kg of aluminum hydroxide, 2 kg of inhibitor, 1.4 kg of catalyst, and 1.4 kg of organosilicon defoaming agent.

[0033] The adhesive layer includes the following raw materials by weight: 55 kg of liquid glue, 15 kg of hydrogenated MQ resin, 15 kg of crosslinking agent, 13 kg of vinyl polysiloxane, 3 kg of propylene oxide resin, 1.4 kg of inhibitor, and 1.4 kg of catalyst. The antifouling layer includes the following raw materials by weight: 50 kg of organic silicon emulsion and 55 kg of silicon dioxide.

[0034] Among them, the modified silicone rubber is from Preparation Example 1, the crosslinking agent is methyltrimethoxysilane, the inhibitor is ethynylcyclopropanol, the catalyst is the organic platinum complex catalyst KARSTEDT, the silicone defoamer is DC-65 type defoamer, the liquid glue is KL-2050AB model glue, the vinyl polysiloxane CAS number is 68083-19-2, the color paste is selected from Caiyuan Pigment bright red paste, the vinyl silicone rubber is methyl vinyl silicone rubber 110-1S, the particle size of the glass powder is 1μm - 10μm, the diameter of the glass fiber is 10μm - 20μm, the wire diameter is 0.5 - 1.5mm, the vinyl resin is selected from VR-518 epoxy vinyl resin, and the particle sizes of magnesium hydroxide and aluminum hydroxide are 1 - 10μm. The hydrogen-containing MQ resin is KX-766 hydrogen-containing MQ resin, the propylene oxide resin is YDF-170 type, the silicone emulsion is selected from 9129 self-crosslinking type, and the particle size of silicon dioxide in the antifouling layer is 10 - 20nm. The matrix material is aramid fiber cloth with an average thickness of 0.3mm.

[0035] The preparation method of the multi-protection silicone leather includes the following specific steps: S1: Mix the modified silicone rubber, glass powder, glass fiber, wire, crosslinking agent, vinyl polysiloxane, inhibitor, and color paste, then add the catalyst and mix well to form the surface layer mixture; Mix the vinyl silicone rubber, vinyl resin, crosslinking agent, magnesium hydroxide, aluminum hydroxide, inhibitor, and silicone defoamer, then add the catalyst and mix well to obtain the intermediate layer mixture; Mix the liquid glue, hydrogen-containing MQ resin, 10 - 20 parts of crosslinking agent, vinyl polysiloxane propylene oxide resin, and inhibitor, then add the catalyst and mix well to obtain the adhesive glue layer mixture; Mix the silicone emulsion and silicon dioxide and mix well to form the antifouling layer mixture.

[0036] S2: Coat the surface layer mixture on the release paper, heat and bake at 130°C for 2 minutes to form a surface layer with an average thickness of 45μm. Coat the intermediate layer mixture on the surface of the surface layer, heat and bake at 130°C for 2 minutes to form an intermediate layer with an average thickness of 200μm. After coating the adhesive glue layer mixture on the surface of the intermediate layer and laminating it with the matrix material, heat and bake at 130°C for 4 minutes to bake and form an adhesive glue layer with an average thickness of 150μm. Peel off the release paper, and finally spray the antifouling layer mixture on the side of the surface layer facing away from the intermediate layer to form an antifouling layer with an average thickness of 15μm, thus obtaining the multi-protection silicone leather.

[0037] Example 2 The difference between Example 2 and Example 1 is that the amount of modified silicone rubber used in the surface layer raw materials is 40 kg, the amount of glass powder used is 30 kg, the amount of glass fiber used is 5 kg, the amount of steel wire used is 5 kg, the amount of crosslinking agent used is 10 kg, the amount of vinyl polysiloxane used is 10 g, the amount of inhibitor used is 1 kg, the amount of color paste used is 0.5 kg, and the amount of catalyst used is 0.1 kg.

[0038] Example 3 The difference between Example 3 and Example 1 is that the amount of modified silicone rubber used in the surface layer raw materials is 60 kg, the amount of glass powder used is 40 kg, the amount of glass fiber used is 2 kg, the amount of steel wire used is 2 kg, the amount of crosslinking agent used is 20 kg, the amount of vinyl polysiloxane used is 15 g, the amount of inhibitor used is 3 kg, the amount of color paste used is 2 kg, and the amount of catalyst used is 3 kg.

[0039] Example 4 The difference between Example 4 and Example 1 is that the amount of vinyl silicone rubber used in the intermediate layer raw materials is 10 kg, the amount of vinyl resin used is 30 kg, the amount of crosslinking agent used is 10 kg, the amount of magnesium hydroxide used is 10 kg, the amount of aluminum hydroxide used is 15 kg, the amount of inhibitor used is 1 kg, the amount of catalyst used is 0.1 kg, and the amount of silicone defoamer used is 0.5 kg.

[0040] Example 5 The difference between Example 5 and Example 1 is that the amount of vinyl silicone rubber used in the intermediate layer raw materials is 20 kg, the amount of vinyl resin used is 40 kg, the amount of crosslinking agent used is 20 kg, the amount of magnesium hydroxide used is 15 kg, the amount of aluminum hydroxide used is 10 kg, the amount of inhibitor used is 3 kg, the amount of catalyst used is 3 kg, and the amount of silicone defoamer used is 3 kg.

[0041] Example 6 The difference between Example 6 and Example 1 is that the adhesive layer comprises the following raw materials in parts by weight: 50 kg of liquid glue, 20 kg of hydrogen-containing MQ resin, 10 kg of crosslinking agent, 10 kg of vinyl polysiloxane, 1 kg of propylene oxide resin, 0.1 kg of inhibitor, and 0.1 kg of catalyst.

[0042] Example 7 The difference between Example 7 and Example 1 is that the adhesive layer comprises the following raw materials in parts by weight: 60 kg of liquid glue, 10 kg of hydrogen-containing MQ resin, 20 kg of crosslinking agent, 15 kg of vinyl polysiloxane, 5 kg of propylene oxide resin, 3 kg of inhibitor, and 3 kg of catalyst.

[0043] Example 8 Example 8 is different from Example 1 in that the antifouling layer comprises the following raw materials in parts by weight: 40 kg of silicone emulsion and 60 kg of silicon dioxide.

[0044] Example 9 Example 9 is different from Example 1 in that the antifouling layer comprises the following raw materials in parts by weight: 60 kg of silicone emulsion and 50 kg of silicon dioxide.

[0045] Example 10 Example 10 is different from Example 1 in that the modified silicone rubber in the surface layer raw materials is derived from Preparation Example 2.

[0046] Example 11 Example 11 is different from Example 1 in that the modified silicone rubber in the surface layer raw materials is derived from Preparation Example 3.

[0047] Example 12 Example 12 is different from Example 1 in that the modified silicone rubber in the surface layer raw materials is derived from Preparation Example 4.

[0048] Example 13 Example 13 is different from Example 1 in that the modified silicone rubber in the surface layer raw materials is derived from Preparation Example 5.

[0049] Comparative Example Comparative Example 1 Comparative Example 1 is different from Example 1 in that silver nanoparticles are used to replace an equal amount of silver-loaded nano-silica in the modified silicone rubber.

[0050] Performance detection test: The following performance detections were carried out on the multi-protection silicone leather provided in Examples 1-13 and Comparative Example 1 of the present application. The specific detection results are shown in Table 1.

[0051] Detection method I. Abrasion resistance Referring to the standard of GB / T 21196.2-2007 "Testing of fabric abrasion resistance by Martindale method for textiles", the abrasion resistance of the silicone leather prepared in the present application was detected.

[0052] II. Tensile load and bursting strength Referring to Sections 5.7 and 5.15 of the standard of GB / T8949-2008 "Polyurethane dry-process artificial leather", the tensile load and bursting strength of the silicone leather prepared in the present application were detected.

[0053] III. Antibacterial performance The antibacterial performance of the silicone leather prepared in this application was tested by culturing bacteria in a petri dish. The silicone leather prepared in this application was cut into specimens with a length of (40 mm ± 2 mm) and a width of (40 mm ± 2 mm). Then, the samples were washed twice with alcohol and dried thoroughly. Then, the dried specimens were placed in a clean petri dish, and 0.4 mL of Escherichia coli inoculum was accurately measured with a pipette and dropped onto the surface of the specimens. Then, a sterile plastic wrap was gently covered to disperse the bacterial liquid evenly. After culturing for 18 h in an environment with a temperature of 35°C ± 1°C and a relative humidity of 85%, it was eluted with phosphate buffer saline, and then the viable bacteria count was performed to obtain the antibacterial rate. The specimens were subjected to antibacterial tests, and the number of uses when the antibacterial activity of the specimens decreased by 50% was recorded.

[0054] Table 1: Data Sheet of Performance Detection Results From the performance detection results, it can be seen that introducing glass fiber, glass powder, and high-strength steel wire fillers into the surface layer of the silicone leather prepared in this application can endow the silicone leather with better tensile strength and bursting strength. At the same time, using modified silicone rubber containing silver-loaded nano-silica in the surface layer can improve the antibacterial persistence of the silicone leather, enhance the protective effect of the silicone leather in all aspects, and finally achieve multiple protections.

[0055] By comparing Comparative Example 1 with Example 1, it can be seen that Comparative Example 1 uses silver powder instead of silver-loaded silica. From the performance detection results, it can be seen that both the antibacterial performance and strength of the silicone leather will decline.

[0056] This specific embodiment is only an interpretation of this application, and it is not a limitation of this application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions according to needs, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A multi-protection silicone leather, characterized in that, The invention comprises a surface layer, an intermediate layer, a base material and an antifouling layer, wherein an adhesive layer is coated between the intermediate layer and the base material, and the antifouling layer is located on the side of the surface layer away from the intermediate layer; the surface layer comprises the following raw materials in parts by weight: 40-60 parts of modified silicone rubber, 30-40 parts of glass powder, 2-5 parts of glass fiber, 2-5 parts of steel wire, 10-20 parts of crosslinking agent, 10-15 parts of vinyl polysiloxane, 1-3 parts of inhibitor, 0.5-2 parts of color paste and 0.1-3 parts of catalyst; the modified silicone rubber raw materials comprise silicone rubber and silver-loaded nano-silicon dioxide.

2. The multi-protection silicone leather according to claim 1, characterized in that, The preparation method of the modified silicone rubber comprises the following specific steps: Mixing silver nitrate and nano-silicon dioxide to form a reaction solution, adjusting the pH of the reaction solution to 6-8, heating to 40-60° C. to react in the dark, centrifugally washing and drying the reaction solution to obtain silver-loaded nano-silicon dioxide; The silicone rubber and silver-loaded nano-silicon dioxide are uniformly mixed, a curing agent is added and mixed, and the modified silicone rubber is obtained after vulcanization.

3. The multi-protection silicone leather according to claim 2, characterized in that, The mass ratio of silver nitrate to nano-silicon dioxide in the silver-loaded nano-silicon dioxide raw material is (0.5-0.8):

1.

4. The multi-protection silicone leather according to claim 2, wherein The mass ratio of silicone rubber, silver-loaded nano-silicon dioxide and curing agent in the modified silicone rubber raw material is 50:(10-20):(1-2).

5. The multi-protection silicone leather according to claim 1, characterized in that, The intermediate layer comprises the following raw materials in parts by weight: 10-20 parts of vinyl silicone rubber, 30-40 parts of vinyl resin, 10-20 parts of crosslinking agent, 10-15 parts of magnesium hydroxide, 10-15 parts of aluminum hydroxide, 1-3 parts of inhibitor, 0.1-3 parts of catalyst, and 0.5-3 parts of organosilicon defoaming agent.

6. The multi-protection silicone leather according to claim 1, characterized in that, The adhesive layer comprises the following raw materials in parts by weight: 50-60 parts of liquid glue, 10-20 parts of hydrogenated MQ resin, 10-20 parts of crosslinking agent, 10-15 parts of vinyl polysiloxane, 1-5 parts of propylene oxide resin, 0.1-3 parts of inhibitor, and 0.1-3 parts of catalyst.

7. The multi-protection silicone leather according to claim 1, characterized in that, The antifouling layer comprises the following raw materials in parts by weight: 40-60 parts of organic silicon emulsion and 50-60 parts of silicon dioxide.

8. The multi-protection silicone leather according to claim 1, characterized in that, The cross-linking agent is at least one of methyltrimethoxysilane, methyltriacetoxysilane, and methyltributylidene oxime silane; the inhibitor is at least one of ethynylcyclopropanol, 3-methyl-1-dodecyne-3-ol, alkynylsilane, and tetramethyldivinyldisiloxane; and the catalyst is one of an organic platinum complex catalyst, an alcohol-modified chloroplatinic acid catalyst, and a platinum-alkynyl complex catalyst.

9. A method for preparing a multi-protection silicone leather according to any one of claims 1-8, characterized in that, The specific steps include: Mixing modified silicone rubber, glass powder, glass fiber, steel wire, cross-linking agent, vinyl polysiloxane, inhibitor, color paste and catalyst to form a surface layer mixture; The surface layer mixture is coated on the release paper, heated and dried to obtain the surface layer, the middle layer mixture is coated on the surface of the surface layer, and dried to form the middle layer, the adhesive layer mixture is coated on the surface of the middle layer and then bonded to the base material, and dried to form the adhesive layer, the release paper is peeled off, and finally the antifouling layer mixture is sprayed on the side of the surface layer away from the middle layer to form the antifouling layer, thereby obtaining the multi-layer protective silicone leather.

10. The preparation method of the multi-protection silicone leather according to claim 9, characterized in that, The matrix material is one of ultra-high molecular weight polyethylene fiber, graphene, and aramid fiber.

Images