High-light-transmittance low-haze organic silicon leather composite material and preparation method thereof

Abstract

The invention relates to organic silicon leather, in particular to a high-light-transmittance low-haze organic silicon leather composite material and a preparation method thereof.The composite material comprises a Teflon layer, and a silica gel layer is compounded on the Teflon layer; the silica gel layer comprises a high-light-transmittance low-haze layer, and raw materials of the high-light-transmittance low-haze layer at least comprise two kinds of organic silicon microspheres with different particle sizes; the preparation method comprises the steps of preparing a raw material of the bonding layer, preparing the light-transmitting layer, preparing a raw material of the high-light-transmitting low-haze layer and preparing the organic silicon leather composite material, the silica gel layer is compounded on the Teflon layer, and the light transmittance of the silica gel layer is improved by adopting two kinds of organic silicon microspheres with different particle sizes; the toughness of the composite material is improved by utilizing the silica gel layer while the light transmittance of the Teflon layer is fully exerted, the overall hardness is relatively low, and electronic components are prevented from being damaged by pressure in application.

Description

Technical Field

[0001] This invention relates to an organosilicon leather, and more particularly to a high-transmittance, low-haze organosilicon leather composite material and its preparation method. Background Technology

[0002] Teflon films are favored for their excellent light transmittance. Their surface not only possesses superior anti-fouling properties but also significant hydrophobicity, making them excellent in a variety of applications. However, when the thickness of this film is increased to 0.2 mm, its flexibility inevitably decreases, and noticeable creases easily appear during bending, making it difficult for these creases to return to their original state. This characteristic is particularly detrimental in the use of smart devices, potentially leading to incorrect judgments about the product's status and thus affecting overall performance.

[0003] On the other hand, if a glass cover is chosen as an alternative, although it has high hardness, this high-hardness material can easily damage fragile electronic components during equipment operation, increasing the risk of equipment failure.

[0004] Furthermore, in demanding fields such as high-end display devices and decorative components for smart devices, the haze value of the thin film needs to be strictly controlled within a low range of 60-70%. However, in existing technologies, it is difficult to achieve both high transmittance and low haze at the same time. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the purpose of this invention is to provide a high-transmittance, low-haze silicone leather composite material and its preparation method.

[0006] The technical solution adopted by the present invention to solve the problem is: a high light transmittance and low haze organosilicon leather composite material, comprising a Teflon layer, wherein a silicone layer is laminated on the Teflon layer; the silicone layer comprises a high light transmittance and low haze layer, wherein the raw material of the high light transmittance and low haze layer comprises at least two kinds of organosilicon microspheres with different particle sizes.

[0007] As a further improvement to the above technical solution, at least two types of organosilicon microspheres have particle sizes of 1-3 micrometers and 4-6 micrometers, respectively.

[0008] As a further improvement to the above technical solution, the particle sizes of the two types of organosilicon microspheres are 2 micrometers and 5 micrometers, respectively; the weight ratio between the 2-micrometer organosilicon microspheres and the 5-micrometer organosilicon microspheres is 2:1.

[0009] As a further improvement to the above technical solution, the total weight percentage of the organosilicon microspheres is 5%-10% of the weight percentage of all raw materials in the high-transmittance, low-haze layer.

[0010] As a further improvement to the above technical solution, the high-transmittance and low-haze layer is made of the following raw materials in parts by weight: 10-20 parts of third vinyl silicone oil, 1.5-3 parts of organosilicon microspheres, 5-10 parts of third hydrogen-containing silicone oil, 0.02-0.1 parts of third inhibitor, and 0.1-1 parts of third platinum catalyst.

[0011] As a further improvement to the above technical solution, the silicone layer further includes a light-transmitting layer, which is made of the following raw materials in parts by weight: 10-20 parts of second vinyl silicone oil, 30-50 parts of vinyl MQ silicone resin, 5-10 parts of second hydrogen-containing silicone oil, 0.02-0.1 parts of second inhibitor, 0.1-1 parts of second platinum catalyst, and 1-3 parts of silane coupling agent.

[0012] As a further improvement to the above technical solution, the silicone layer further includes an adhesive layer, which is made of the following raw materials in parts by weight: 10-20 parts of first vinyl silicone oil, 1-3 parts of silica, 5-10 parts of first hydrogen-containing silicone oil, 0.02-0.1 parts of first inhibitor, 0.1-1 parts of first platinum catalyst, and 1-3 parts of tackifier.

[0013] As a further improvement to the above technical solution, the adhesive layer, the light-transmitting layer, and the high-transmittance, low-haze layer are sequentially laminated on top of the Teflon layer.

[0014] A method for preparing a high-transmittance, low-haze silicone leather composite material as described in claim 8, comprising the following steps: S1. The first vinyl silicone oil, fumed silica, first hydrogen-containing silicone oil, first inhibitor, first platinum catalyst and tackifier in the specified weight proportions are added to a dispersing mixer and dispersed and stirred for 10-20 minutes to obtain the adhesive layer raw material.

[0015] S2. The second vinyl silicone oil, vinyl MQ silicone resin, second hydrogen-containing silicone oil, second inhibitor, second platinum catalyst and silane coupling agent in the specified weight proportions are added to a dispersing mixer and dispersed for 10-20 minutes to obtain a light-transmitting layer material. Then, the light-transmitting layer material is coated on release paper or leather paper and conveyed to a tunnel oven via a conveyor belt. It is then baked at 110-130°C for 5-8 minutes to form a light-transmitting layer.

[0016] S3. The specified weight proportions of the third vinyl silicone oil, organosilicon microspheres, third hydrogen-containing silicone oil, third inhibitor, and third platinum catalyst are added to a dispersing mixer and dispersed for 10-20 minutes to obtain a high-transmittance, low-haze layer raw material.

[0017] S4. First, the adhesive layer material is coated on the upper surface of the Teflon layer. Then, the light-transmitting layer is attached above the adhesive layer. Finally, the high-transmittance, low-haze layer material is coated on the upper surface of the light-transmitting layer. After curing, an organosilicon leather composite material is obtained.

[0018] As a further improvement to the above technical solution, the thickness of the Teflon layer is 0.2 mm; the thickness of the adhesive layer is 10 micrometers; the thickness of the transparent layer is 15 micrometers; and the thickness of the high-transmittance, low-haze layer is 5 micrometers.

[0019] The beneficial effects of this invention are: by composited silicone layer on Teflon layer, the silicone layer improves light transmittance by using two types of organosilicon microspheres with different particle sizes, fully utilizing the light transmittance of Teflon layer while improving the toughness of composite material by silicone layer, resulting in low overall hardness and avoiding damage to electronic components during application. Attached Figure Description

[0020] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a graph showing the test results of the present invention. Detailed Implementation

[0022] In all embodiments of the present invention, unless otherwise emphasized, temperature and pressure are at normal temperature and pressure. Unless otherwise specified, the equipment can be used according to conventional settings.

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0025] Example 1: A high-transmittance, low-haze silicone leather composite material, comprising, from bottom to top, a Teflon layer, an adhesive layer, a light-transmitting layer, and a high-transmittance, low-haze layer, wherein the adhesive layer, the light-transmitting layer, and the high-transmittance, low-haze layer together constitute a silicone layer.

[0026] The adhesive layer is made of the following raw materials in parts by weight: 20 parts of first vinyl silicone oil, 2 parts of silica, 8 parts of first hydrogen-containing silicone oil, 0.02 parts of first inhibitor, 0.1 parts of first platinum catalyst, and 1 part of tackifier.

[0027] The light-transmitting layer is made of the following raw materials in parts by weight: 20 parts of second vinyl silicone oil, 40 parts of vinyl MQ silicone resin (which may be, but is not limited to, Longsheng Sihai SH-5202), 8 parts of second hydrogen-containing silicone oil, 0.02 parts of second inhibitor, 0.1 parts of second platinum catalyst, and 1 part of silane coupling agent.

[0028] The high-transmittance, low-haze layer is made from the following raw materials in parts by weight: 20 parts of third vinyl silicone oil, 2 parts of organosilicon microspheres, 8 parts of third hydrogen-containing silicone oil, 0.02 parts of third inhibitor, and 0.1 parts of third platinum catalyst.

[0029] Furthermore, the organosilicon microspheres account for 6.64% of the total weight of all raw materials in the high-transmittance, low-haze layer. The amount of organosilicon microspheres directly determines the haze value. A weight ratio of 5%-10% for organosilicon microspheres can control the haze value within the range of 60-70%.

[0030] Furthermore, the organosilicon microspheres are composed of organosilicon microspheres with particle sizes of 2 micrometers and 5 micrometers, respectively. The weight ratio between the 2-micrometer organosilicon microspheres and the 5-micrometer organosilicon microspheres is 2:1. The use of the two types of microspheres with different particle sizes allows for flexible adjustment of light transmittance to achieve the best optical effect. The combined use of the two types of organosilicon microspheres results in an overall light transmittance of over 89%.

[0031] This invention overcomes the technical challenge of simultaneously achieving high light transmittance and low haze by combining silicone microspheres of different particle sizes and the total dosage ratio, enabling the composite material of this invention to maintain excellent light transmittance while exhibiting good flexibility and resistance to yellowing.

[0032] Specifically, the silica may be, but is not limited to, Tokuyama FM-14; the first, second, and third inhibitors are diallyl maleate; the first, second, and third platinum catalysts are ethanol solutions with a concentration of 5000 ppm; and the silane coupling agent is KH-570 coupling agent.

[0033] Furthermore, the tackifier is a self-synthesized organosilicon-modified epoxy silane. The addition of the organosilicon-modified epoxy silane gives the adhesive layer excellent adhesion to the Teflon layer, maintaining stability under extreme high and low temperature conditions without detachment. The raw materials for synthesizing the organosilicon-modified epoxy silane include 3-(methacryloyloxy)propyltrimethoxysilane (CAS NO. 2530-85-0), 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane (CAS NO. 3388-04-03), hydroxyl polydimethylsiloxane (CAS No. 70131-67-8), and tetrabutyl titanate (CAS No. 5593-70-4). The synthesis steps of the organosilicon-modified epoxy silane are as follows: A1. Add 50g of the hydroxyl polydimethylsiloxane and 0.1g of the tetrabutyl titanate into a reactor and heat the mixture to a temperature of 75°C for 2 hours. A2. During the S1 reaction, the 3-(methacryloyloxy)propyltrimethoxysilane and 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane are slowly added over 10 minutes. A3. After the S1 reaction is complete, stop heating and cool to room temperature until the mixture cools to room temperature; A4. Add 3.5g of activated carbon to the mixture after S3 has cooled, stir and filter, and take the filtrate. A5. The filtrate in S4 is subjected to vacuum distillation at a temperature of 85-95℃ and a vacuum degree of 5mmHg. The organosilicon-modified epoxy silane is obtained after vacuum distillation.

[0034] The thickness of the Teflon layer is 0.2 mm; the thickness of the adhesive layer is 10 μm; the thickness of the transparent layer is 15 μm; and the thickness of the high-transmittance, low-haze layer is 5 μm.

[0035] The preparation steps of Example 1 are as follows: S1. The above-mentioned parts by weight of the first vinyl silicone oil, silica, first hydrogen-containing silicone oil, first inhibitor, first platinum catalyst and tackifier are added to a dispersing mixer and dispersed and stirred for 15 minutes to obtain the adhesive layer raw material. S2. The above-mentioned weight proportions of the second vinyl silicone oil, vinyl MQ silicone resin, second hydrogen-containing silicone oil, second inhibitor, second platinum catalyst and silane coupling agent are added to a dispersion mixer and dispersed and stirred for 15 minutes to obtain a light-transmitting layer material. Then, the light-transmitting layer material is coated on release paper or leather paper and conveyed to a tunnel oven via a conveyor belt. It is baked at 130°C for 5 minutes to form a light-transmitting layer. S3. The weight proportions of the third vinyl silicone oil, organosilicon microspheres, third hydrogen-containing silicone oil, third inhibitor, and third platinum catalyst are added to a dispersing mixer and dispersed for 15 minutes to obtain a high-transmittance, low-haze layer raw material. S4. First, the adhesive layer material is coated on the upper surface of the Teflon layer. Then, the light-transmitting layer is attached above the adhesive layer. Finally, the high-transmittance, low-haze layer material is coated on the upper surface of the light-transmitting layer. After curing, an organosilicon leather composite material is obtained.

[0036] Example 2: The difference from Example 1 is that the weight of the organosilicon microspheres is 1 part.

[0037] Example 3: The difference from Example 1 is that the weight of the organosilicon microspheres is 3 parts.

[0038] Example 4: The difference from Example 1 is that the weight of the organosilicon microspheres is 5 parts.

[0039] Example 5: The difference from Example 1 is that the organosilicon microspheres are organosilicon microspheres with a single particle size of 2 micrometers.

[0040] Example 6: The difference from Example 1 is that the organosilicon microspheres are single-sized organosilicon microspheres with a particle size of 5 micrometers.

[0041] Example 7: The difference from Example 1 is that the weight ratio of 2-micron organosilicon microspheres to 5-micron organosilicon microspheres is 1:1.

[0042] Example 8: The difference from Example 1 is that the weight ratio of 2-micron silicone microspheres to 5-micron silicone microspheres is 1:2.

[0043] The transmittance and haze values ​​of Examples 1 to 8 obtained above were measured, and the results are as follows: Figure 1 As shown.

[0044] The test method for light transmittance is as follows: a light transmittance meter is used to detect light at three random locations along different lengths of the composite material to obtain a test dataset; the test method for haze value is as follows: a haze meter is used to detect haze at three random locations along different lengths of the composite material to obtain a test dataset.

[0045] Depend on Figure 1 The test results show that when the weight percentage of organosilicon microspheres is less than 5%, the overall haze value is too low, below 60%; when the weight percentage of organosilicon microspheres is greater than 10%, the overall haze value is too high, above 70%; when the weight percentage of organosilicon microspheres is between 5% and 10%, the haze value can be strictly controlled within the range of 60% to 70%.

[0046] By combining organosilicon microspheres of different particle sizes, the light transmittance can be adjusted. When using 2-micron organosilicon microspheres and 5-micron organosilicon microspheres with a weight fraction ratio of 2:1, the best optical effect can be achieved, with a light transmittance of over 89%, ensuring that light can pass through efficiently.

[0047] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct or indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A high-transmittance, low-haze silicone leather composite material, comprising a Teflon layer, characterized in that: A silicone layer is laminated onto the Teflon layer; The silicone layer includes a high-transmittance, low-haze layer, and the raw material of the high-transmittance, low-haze layer includes at least two types of organosilicon microspheres with different particle sizes.

2. The high light transmittance, low haze silicone leather composite material as described in claim 1, characterized in that: At least two types of organosilicon microspheres have particle sizes of 1-3 micrometers and 4-6 micrometers, respectively.

3. The high light transmittance, low haze silicone leather composite material as described in claim 2, characterized in that: The particle sizes of the two types of organosilicon microspheres are 2 micrometers and 5 micrometers, respectively; The weight ratio of 2-micron organosilicon microspheres to 5-micron organosilicon microspheres is 2:

1.

4. The high light transmittance, low haze silicone leather composite material as described in claim 3, characterized in that: The total weight percentage of the organosilicon microspheres is 5%-10% of the weight percentage of all raw materials in the high-transmittance, low-haze layer.

5. The high light transmittance, low haze silicone leather composite material as described in claim 4, characterized in that: The high-transmittance, low-haze layer is made from the following raw materials in parts by weight: 10-20 parts of third vinyl silicone oil, 1.5-3 parts of organosilicon microspheres, 5-10 parts of third hydrogen-containing silicone oil, 0.02-0.1 parts of third inhibitor, and 0.1-1 parts of third platinum catalyst.

6. The high light transmittance, low haze silicone leather composite material as described in claim 5, characterized in that: The silicone layer further includes a light-transmitting layer, which is made of the following raw materials in parts by weight: 10-20 parts of second vinyl silicone oil, 30-50 parts of vinyl MQ silicone resin, 5-10 parts of second hydrogen-containing silicone oil, 0.02-0.1 parts of second inhibitor, 0.1-1 parts of second platinum catalyst, and 1-3 parts of silane coupling agent.

7. The high light transmittance, low haze silicone leather composite material as described in claim 6, characterized in that: The silicone layer further includes an adhesive layer, which is made of the following raw materials in parts by weight: 10-20 parts of first vinyl silicone oil, 1-3 parts of silica, 5-10 parts of first hydrogen-containing silicone oil, 0.02-0.1 parts of first inhibitor, 0.1-1 parts of first platinum catalyst, and 1-3 parts of tackifier.

8. The high light transmittance, low haze silicone leather composite material as described in claim 7, characterized in that: The adhesive layer, the light-transmitting layer, and the high-transmittance, low-haze layer are sequentially laminated on top of the Teflon layer.

9. A method for preparing a high-transmittance, low-haze organosilicon leather composite material as described in claim 8, characterized in that, Includes the following steps: S1. The first vinyl silicone oil, silica, first hydrogen-containing silicone oil, first inhibitor, first platinum catalyst and tackifier in the specified weight proportions are added to a dispersing mixer and dispersed for 10-20 minutes to obtain the adhesive layer raw material. S2. The second vinyl silicone oil, vinyl MQ silicone resin, second hydrogen-containing silicone oil, second inhibitor, second platinum catalyst and silane coupling agent in the specified weight proportions are added to a dispersing mixer and dispersed for 10-20 minutes to obtain a light-transmitting layer material. Then, the light-transmitting layer material is coated on release paper or leather paper and conveyed to a tunnel oven via a conveyor belt. It is baked at 110-130°C for 5-8 minutes to form a light-transmitting layer. S3. The weight proportions of the third vinyl silicone oil, organosilicon microspheres, third hydrogen-containing silicone oil, third inhibitor, and third platinum catalyst are added to a dispersing mixer and dispersed for 10-20 minutes to obtain a high-transmittance, low-haze layer raw material. S4. First, the adhesive layer material is coated on the upper surface of the Teflon layer. Then, the light-transmitting layer is attached above the adhesive layer. Finally, the high-transmittance, low-haze layer material is coated on the upper surface of the light-transmitting layer. After curing, an organosilicon leather composite material is obtained.

10. The preparation method according to claim 9, characterized in that: The thickness of the Teflon layer is 0.2 mm; the thickness of the adhesive layer is 10 μm; the thickness of the transparent layer is 15 μm; and the thickness of the high-transmittance, low-haze layer is 5 μm.

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