Wear-resistant organic silicon leather and preparation method thereof

Abstract

The invention relates to organic silicon leather, in particular to wear-resistant organic silicon leather and a preparation method thereof.The wear-resistant organic silicon leather comprises a silicon rubber layer, the silicon rubber layer is formed by curing liquid glue, and the hardness range of the cured liquid glue is 60-70 A; the preparation method comprises the steps of preparation of raw materials of the wear-resistant layer, preparation of the bonding layer, formation of the wear-resistant layer, formation of the silicone rubber layer and preparation of the wear-resistant organic silicon leather, and the silicone rubber layer adopts liquid glue with the hardness of 60-80A, so that the tearing strength of the silicone rubber layer is improved, and the wear resistance of the organic silicon leather is improved.

Description

Technical Field

[0001] The invention relates to organosilicon leather, in particular to wear-resistant organosilicon leather and a preparation method thereof. Background Art

[0002] At present, many kinds of synthetic leather have been developed in the market to replace natural leather, mainly polyurethane (PU) or polyvinyl chloride (PVC) materials, which are widely used in furniture, decoration, clothing, footwear, automobiles, etc. However, in order to meet the increasingly stringent safety and environmental protection requirements, they cannot meet the use requirements in some physical properties such as heat resistance, stain resistance, solvent resistance, hydrolysis resistance, weather resistance, etc. Compared with PU / PVC, silicone leather has good heat resistance, stain resistance, solvent resistance, hydrolysis resistance, and weather resistance, but silicone rubber also has its own shortcomings, because during the curing process of silicone rubber, the cross-linking density is low and the network structure is simple, so the wear resistance of silicone leather is worse than that of PU / PVC.

[0003] Therefore, there is an urgent need for an organosilicon leather that can solve the problem of wear resistance. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a wear-resistant silicone leather and a preparation method thereof.

[0005] The technical solution adopted by the present invention to solve the problem is: a wear-resistant silicone leather, comprising a silicone rubber layer, the silicone rubber layer is formed by curing liquid glue, and the hardness range of the liquid glue after curing is 60-70A.

[0006] As a further improvement of the above technical solution, the hardness of the liquid glue after curing is 60A.

[0007] As a further improvement of the above technical solution, a wear-resistant layer is arranged on the upper surface of the silicone rubber layer, and the raw material of the wear-resistant layer includes filler, and the filler is polymethyl methacrylate.

[0008] As a further improvement of the above technical solution, a wear-resistant layer is arranged on the upper surface of the silicone rubber layer, and the raw material of the wear-resistant layer includes filler, and the filler is a copolymer of polyvinyl chloride and polymethyl methacrylate.

[0009] As a further improvement of the above technical solution, the lower surface of the silicone rubber layer is fixedly connected to the base cloth via an adhesive layer, and the raw material of the adhesive layer includes the liquid glue.

[0010] A method for preparing wear-resistant silicone leather, comprising the wear-resistant silicone leather as claimed in claim 5, wherein the silicone rubber layer is formed by curing a first liquid glue; the wear-resistant layer is made of the following raw materials in parts by weight: 5-15 parts of vinyl silicone rubber base glue, 40-60 parts of vinyl MQ resin, 10-20 parts of first vinyl silicone oil, 2-8 parts of filler, 5-15 parts of high hydrogen-containing silicone oil, 1-3 parts of first silane coupling agent, 0.5-1 parts of first platinum catalyst, and 0.02-0.1 parts of first inhibitor; the adhesive layer is made of the following raw materials in parts by weight: 50-70 parts of second liquid glue, 15-35 parts of second vinyl silicone oil, 4-10 parts of hydrogen-containing MQ resin, 1-3 parts of second silane coupling agent, 0.5-1 parts of second platinum catalyst, and 0.02-0.1 parts of second inhibitor; the preparation steps are as follows:

[0011] S1: Put the above-mentioned weight proportions of vinyl silicone rubber base, vinyl MQ resin, first vinyl silicone oil, filler, high hydrogen silicone oil, first silane coupling agent, first platinum catalyst and first inhibitor into a planetary disperser, pass cooling water, turn on the vacuum equipment, disperse and stir for 10-20 minutes to obtain the wear-resistant layer raw material.

[0012] S2: Add the second liquid glue, the second vinyl silicone oil, the hydrogenated MQ resin, the second silane coupling agent, the second platinum catalyst and the second inhibitor in the above-mentioned weight proportions into a planetary disperser, pass cooling water, turn on the vacuum equipment, and disperse and stir for 10-20 minutes to obtain the bonding layer raw material.

[0013] S3: Coat the wear-resistant layer raw material on the release paper or leather paper, transfer it to the tunnel oven through a conveyor belt, and bake it at a temperature of 110-130°C for 5-8 minutes to form a wear-resistant layer.

[0014] S4: The first liquid glue is applied to the surface of the wear-resistant layer by a hydraulic silicone feeder, and then conveyed to a tunnel furnace oven by a conveyor belt, and baked at a temperature of 110-130° C. for 5-8 minutes to form a silicone rubber layer.

[0015] S5: coating the adhesive layer raw material on the surface of the silicone rubber functional layer, laminating it with the base cloth after coating, and then transferring it to a tunnel oven, baking it at a temperature of 110-130°C for 5-8 minutes, and finally peeling off the release paper or leather paper to obtain wear-resistant silicone leather.

[0016] As a further improvement of the above technical solution, the first silane coupling agent and the second silane coupling agent are one or a mixture of two or more of 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane, KH-560, and KH-570; the first inhibitor and the second inhibitor are one or a mixture of two of ethynyl cyclohexanol and diallyl maleate.

[0017] As a further improvement of the above technical solution, the thickness of the wear-resistant layer is 0.05-0.1 mm; the thickness of the silicone rubber layer is 0.1-0.2 mm; and the thickness of the adhesive layer is 0.05-0.1 mm.

[0018] The beneficial effects of the present invention are as follows: the silicone rubber layer of the present invention improves the tear strength of the silicone rubber layer and the wear resistance of the organic silicone leather by adopting liquid glue with a hardness of 60-80A. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a rendering of the effect after the wear resistance test of Example 1;

[0021] Figure 2 This is the effect diagram after the wear resistance test of Example 2;

[0022] Figure 3 This is the effect diagram after the wear resistance test of comparative example 1;

[0023] Figure 4 This is the effect diagram after the wear resistance test of comparative example 2;

[0024] Figure 5 The figure is a comparison chart of the effects after the wear resistance test of Example 1, Example 2, Comparative Example 1 and Comparative Example 2. DETAILED DESCRIPTION

[0025] In all embodiments of the present invention, unless otherwise specified about temperature and pressure, all are at room temperature and pressure, and unless otherwise specified about the use of equipment, all can be used according to conventional settings.

[0026] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific implementation methods. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0027] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0028] Reference Figures 1 to 5Embodiment 1: A wear-resistant silicone leather, comprising a wear-resistant layer, a silicone rubber layer, an adhesive layer and a base fabric designed in sequence, the base fabric can be but not limited to non-woven fabric, the thickness of the wear-resistant layer is 0.1 mm, the thickness of the silicone rubber layer is 0.1 mm, and the thickness of the adhesive layer is 0.07 mm. It is understood that in actual use, from top to bottom, they are the wear-resistant layer, the silicone rubber layer, the adhesive layer and the base fabric; while in the preparation process, it is the opposite of the use, from top to bottom, they are the base fabric, the adhesive layer, the silicone rubber layer and the wear-resistant layer.

[0029] The wear-resistant layer is made of the following raw materials in parts by weight: 5 parts of vinyl silicone rubber base glue, 40 parts of vinyl MQ resin (which may be but is not limited to Longsheng Sihai SH-5202), 20 parts of the first vinyl silicone oil, 6 parts of filler, 8 parts of high hydrogen silicone oil, 1.5 parts of the first silane coupling agent, 0.5 parts of the first platinum catalyst and 0.02 parts of the first inhibitor; the vinyl content in the vinyl silicone rubber base glue is 0.2%; the viscosity of the vinyl MQ resin is 20000cs, and the vinyl content is 2.0%; the viscosity of the first vinyl silicone oil is 500cs, and the vinyl content is 5.0%; the filler is polymethyl methacrylate with a particle size of 100um; the viscosity of the high hydrogen silicone oil is 50cs, and the hydrogen content is 1.6%; the first silane coupling agent is 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane; the first platinum catalyst is a 5000ppm ethanol solution; the first inhibitor is diallyl maleate.

[0030] The silicone rubber layer is formed by curing a first liquid glue, which is purchased from Shandong Dongyue Silicone Materials Co., Ltd. and has a model of LSR-60A-MI (LSR-60A / BMI). The hardness of the liquid glue after curing is 60A.

[0031] The bonding layer is made of the following raw materials in parts by weight: 60 parts of a second liquid glue, 15 parts of a second vinyl silicone oil, 8 parts of a hydrogenated MQ resin, 1 part of a second silane coupling agent, 0.5 parts of a second platinum catalyst, and 0.02 parts of a second inhibitor; the manufacturer and model of the second liquid glue are the same as those of the first liquid glue; the viscosity of the second vinyl silicone oil is 500cs, and the vinyl content is 5.0%; the viscosity of the hydrogenated MQ resin is 100cs, and the hydrogen content is 0.7%; the second silane coupling is 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane; the second platinum catalyst is a 5000ppm ethanol solution; and the second inhibitor is diallyl maleate.

[0032] Preparation method of embodiment 1:

[0033] S1: Preparation of wear-resistant layer raw materials: put the above-mentioned weight proportions of vinyl silicone rubber base glue, vinyl MQ resin, first vinyl silicone oil, filler, high hydrogen silicone oil, first silane coupling agent, first platinum catalyst and first inhibitor into a planetary disperser, pass cooling water, turn on the vacuum equipment, disperse and stir for 15 minutes to obtain the wear-resistant layer raw materials.

[0034] S2: Preparation of adhesive layer: put the second liquid glue, the second vinyl silicone oil, the hydrogenated MQ resin, the second silane coupling agent, the second platinum catalyst and the second inhibitor in the above-mentioned weight proportions into a planetary disperser, pass cooling water, turn on the vacuum equipment, disperse and stir for 15 minutes to obtain the adhesive layer raw material.

[0035] S3: Formation of wear-resistant layer: The wear-resistant layer raw material is coated on release paper or leather paper, and is transferred to a tunnel oven through a conveyor belt, and baked at a temperature of 110° C. for 8 minutes to form a wear-resistant layer.

[0036] S4: Formation of silicone rubber layer: coating the first liquid glue on the surface of the wear-resistant layer by a hydraulic silicone feeder, and then conveying it to a tunnel oven by a conveyor belt, and baking it at a temperature of 130° C. for 5 minutes to form a silicone rubber layer;

[0037] S5: Preparation of wear-resistant silicone leather: The adhesive layer raw material is coated on the surface of the silicone rubber functional layer, and then laminated with the base cloth after coating, and then transferred to a tunnel oven, and baked at 130°C for 8 minutes, and finally the release paper or leather paper is peeled off to obtain Example 1.

[0038] Embodiment 2: A wear-resistant silicone leather, comprising a wear-resistant layer, a silicone rubber layer, an adhesive layer and a base fabric designed in sequence, wherein the base fabric may be but is not limited to non-woven fabric, the wear-resistant layer has a thickness of 0.7 mm, the silicone rubber layer has a thickness of 0.15 mm, and the adhesive layer has a thickness of 0.1 mm.

[0039] The wear-resistant layer is made of the following raw materials in parts by weight: 10 parts of vinyl silicone rubber base glue, 50 parts of vinyl MQ resin, 10 parts of first vinyl silicone oil, 8 parts of filler, 15 parts of high hydrogen silicone oil, 1 part of first silane coupling agent, 0.5 parts of first platinum catalyst and 0.02 parts of first inhibitor; the vinyl content in the vinyl silicone rubber base glue is 0.5%; the viscosity of the vinyl MQ resin is 10000cs, and the vinyl content is 2.5%; the viscosity of the first vinyl silicone oil is 2000cs, and the vinyl content is 3.0%; the filler is a copolymer of polyvinyl chloride and polymethyl methacrylate, and the particle size is 50um; the viscosity of the high hydrogen silicone oil is 100cs, and the hydrogen content is 1.2%; the first silane coupling agent is a mixture of KH-560 and KH-570; the first platinum catalyst is a 5000ppm ethanol solution; the first inhibitor is ethynyl cyclohexanol.

[0040] The silicone rubber layer is formed by curing a first liquid glue, which is purchased from Shandong Dongyue Silicone Materials Co., Ltd. and has a model of LSR-70A-MI (LSR-70A / BMI). The hardness of the liquid glue after curing is 70A.

[0041] The bonding layer is made of the following raw materials in parts by weight: 50 parts of a second liquid glue, 20 parts of a second vinyl silicone oil, 8 parts of a hydrogenated MQ resin, 1 part of a second silane coupling agent, 0.5 parts of a second platinum catalyst, and 0.02 parts of a second inhibitor; the manufacturer and model of the second liquid glue are the same as those of the first liquid glue; the viscosity of the second vinyl silicone oil is 2000cs, and the vinyl content is 3.0%; the viscosity of the hydrogenated MQ resin is 50cs, and the hydrogen content is 1%; the second silane coupling is a mixture of KH-560 and KH-570; the second platinum catalyst is a 5000ppm ethanol solution; and the second inhibitor is ethynyl cyclohexanol.

[0042] The preparation method of embodiment 2:

[0043] S1: Preparation of wear-resistant layer raw materials: put the above-mentioned weight proportions of vinyl silicone rubber base glue, vinyl MQ resin, first vinyl silicone oil, filler, high hydrogen silicone oil, first silane coupling agent, first platinum catalyst and first inhibitor into a planetary disperser, pass cooling water, turn on the vacuum equipment, disperse and stir for 15 minutes to obtain the wear-resistant layer raw materials.

[0044] S2: Preparation of adhesive layer: put the second liquid glue, the second vinyl silicone oil, the hydrogenated MQ resin, the second silane coupling agent, the second platinum catalyst and the second inhibitor in the above-mentioned weight proportions into a planetary disperser, pass cooling water, turn on the vacuum equipment, disperse and stir for 15 minutes to obtain the adhesive layer raw material.

[0045] S3: Formation of wear-resistant layer: The wear-resistant layer raw material is coated on release paper or leather paper, and is transferred to a tunnel oven through a conveyor belt, and baked at a temperature of 110° C. for 8 minutes to form a wear-resistant layer.

[0046] S4: Formation of silicone rubber layer: coating the first liquid glue on the surface of the wear-resistant layer by a hydraulic silicone feeder, and then conveying it to a tunnel oven by a conveyor belt, and baking it at a temperature of 130° C. for 5 minutes to form a silicone rubber layer;

[0047] S5: Preparation of wear-resistant silicone leather: The adhesive layer raw material is coated on the surface of the silicone rubber functional layer, and then laminated with the base cloth after coating, and then transferred to a tunnel oven, and baked at 130°C for 8 minutes, and finally the release paper or leather paper is peeled off to obtain Example 2.

[0048] Embodiment 3: The difference from Embodiment 1 is that the first liquid glue is purchased from Shandong Dongyue Silicone Material Co., Ltd., and the model is LSR-70A-MI liquid glue. The hardness of the liquid glue after curing is 70A.

[0049] Example 4: The difference from Example 2 is that the first liquid glue is purchased from Shandong Dongyue Silicone Materials Co., Ltd., and the model is LSR-60A-MI liquid glue. The hardness of the liquid glue after curing is 60A.

[0050] Comparative Example 1: The difference from Example 1 is that the raw material composition of the wear-resistant layer lacks the filler (polymethyl methacrylate).

[0051] Comparative Example 2: The difference from Example 2 is that the first liquid glue is purchased from Shandong Dongyue Silicone Materials Co., Ltd., and the model is liquid glue LSR-30A-MI (LSR-30A / BMI), and the hardness of the liquid glue after curing is 30A.

[0052] Comparative Example 3: The difference from Example 1 is that the filler is a copolymer of polyvinyl chloride and polymethyl methacrylate.

[0053] The steel wool wear resistance test was performed on the silicone leather of Examples 1 to 4 and Comparative Examples 1 to 3.

[0054] Among them, steel wool wear resistance test: refer to the standard ASTMF2496 for testing, sample size: 5*5cm; steel wool model: Japanese #0000 steel wool; load: 500g heavy weight; number of times: 2500 times; speed: 60rpm.

[0055] Combination Figures 1 to 4 , Figure 1 This is a rendering of the effect after the wear resistance test of Example 1; Figure 2 The effect diagram after the wear resistance test of Example 2; the effect diagram after the wear resistance test of Example 3 is equivalent to that of Example 2; the effect diagram after the wear resistance test of Example 4 is equivalent to that of Example 1; Figure 3 This is the effect diagram after the wear resistance test of comparative example 1; Figure 4 This is the effect diagram after the wear resistance test of comparative example 2; the effect diagram after the wear resistance test of comparative example 3 is equivalent to that of embodiment 2.

[0056] In combination with Example 1, Example 3 and Comparative Example 3 (or Example 2, Example 4 and Comparative Example 2), it can be seen that when the silicone rubber layer adopts liquid glue with higher curing hardness, the obtained silicone leather has better tear strength and scratch resistance, preferably 60A-70A. In the range of 60A-70A, that is, by comparing Example 1 and Example 3, it can be seen that the wear resistance of 60A is relatively better.

[0057] In addition, in combination with Example 1, Example 2 and Comparative Example 3, the applicant found through preliminary research that, based on the hardness range of the liquid glue being 60A-70A, the type of filler in the wear-resistant layer will also affect the wear resistance of the silicone leather. According to the existing data, when the curing hardness of the first liquid glue is 60A and the filler of the wear-resistant layer is polymethyl methacrylate, the resulting silicone leather has better wear resistance and is resistant to steel wool abrasion.

[0058] The above implementation modes cannot limit the protection scope of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, and these changes and improvements all fall within the scope of the invention claimed for protection.

Claims

1. A wear-resistant silicone leather, comprising a silicone rubber layer, wherein the silicone rubber layer is formed by curing liquid glue, characterized in that: The hardness of the liquid glue after curing is in the range of 60-70A.

2. The wear-resistant silicone leather according to claim 1, characterized in that: The hardness of the liquid glue after curing is 60A.

3. The wear-resistant silicone leather according to claim 2, characterized in that: The upper surface of the silicone rubber layer is provided with a wear-resistant layer, and the raw material of the wear-resistant layer includes filler, and the filler is polymethyl methacrylate.

4. The wear-resistant silicone leather according to claim 2, characterized in that: The upper surface of the silicone rubber layer is provided with a wear-resistant layer, and the raw material of the wear-resistant layer includes filler, and the filler is a copolymer of polyvinyl chloride and polymethyl methacrylate.

5. The wear-resistant silicone leather according to claim 3 or 4, characterized in that: The lower surface of the silicone rubber layer is fixedly connected to the base fabric via an adhesive layer, and the raw material of the adhesive layer includes the liquid glue.

6. A method for preparing wear-resistant silicone leather, comprising the wear-resistant silicone leather according to claim 5, characterized in that: The silicone rubber layer is formed by curing the first liquid glue; The wear-resistant layer is made of the following raw materials in parts by weight: 5-15 parts of vinyl silicone rubber base, 40-60 parts of vinyl MQ resin, 10-20 parts of first vinyl silicone oil, 2-8 parts of filler, 5-15 parts of high hydrogen silicone oil, 1-3 parts of first silane coupling agent, 0.5-1 parts of first platinum catalyst, and 0.02-0.1 parts of first inhibitor; The bonding layer is made of the following raw materials in parts by weight: 50-70 parts of the second liquid glue, 15-35 parts of the second vinyl silicone oil, 4-10 parts of the hydrogenated MQ resin, 1-3 parts of the second silane coupling agent, 0.5-1 parts of the second platinum catalyst, and 0.02-0.1 parts of the second inhibitor; The preparation steps are as follows: S1: Put the above-mentioned vinyl silicone rubber base, vinyl MQ resin, first vinyl silicone oil, filler, high hydrogen silicone oil, first silane coupling agent, first platinum catalyst and first inhibitor in a planetary disperser, pass cooling water, turn on the vacuum equipment, disperse and stir for 10-20 minutes to obtain the wear-resistant layer raw material; S2: Add the second liquid glue, the second vinyl silicone oil, the hydrogenated MQ resin, the second silane coupling agent, the second platinum catalyst and the second inhibitor in the above-mentioned weight proportions into a planetary disperser, pass cooling water, turn on the vacuum equipment, and disperse and stir for 10-20 minutes to obtain a bonding layer raw material; S3: coating the wear-resistant layer raw material on release paper or leather paper, conveying it to the tunnel oven through a conveyor belt, and baking it at a temperature of 110-130°C for 5-8 minutes to form a wear-resistant layer; S4: applying the first liquid glue to the surface of the wear-resistant layer by a hydraulic silicone feeder, and then conveying it to a tunnel furnace oven by a conveyor belt, and baking it at a temperature of 110-130° C. for 5-8 minutes to form a silicone rubber layer; S5: coating the adhesive layer raw material on the surface of the silicone rubber functional layer, laminating it with the base cloth after coating, and then transferring it to a tunnel oven, baking it at a temperature of 110-130°C for 5-8 minutes, and finally peeling off the release paper or leather paper to obtain wear-resistant silicone leather.

7. The method for preparing wear-resistant silicone leather according to claim 6, characterized in that: The first silane coupling agent and the second silane coupling agent are one or a mixture of two or more of 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane, KH-560, and KH-570; the first inhibitor and the second inhibitor are one or a mixture of two of ethynylcyclohexanol and diallyl maleate.

8. The method for preparing a wear-resistant silicone leather according to claim 6, characterized in that: The thickness of the wear-resistant layer is 0.05-0.1 mm; the thickness of the silicone rubber layer is 0.1-0.2 mm; and the thickness of the bonding layer is 0.05-0.1 mm.

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