Polyvinyl chloride material and preparation method thereof

Abstract

The invention discloses a polyvinyl chloride material which comprises the following components in parts by mass: 55-65 parts of polyvinyl chloride, 10-25 parts of a plasticizer, 1-6 parts of a stabilizer, 0.5-1.5 parts of an anti-UV agent, 0.5-1.5 parts of a lubricant, 4-8 parts of a flame retardant, 5-15 parts of an ethylene-vinyl acetate copolymer elastomer, 1-3 parts of a processing aid and 0.2-0.5 part of toner, the anti-UV agent comprises a combination of 2-(2H-benzotriazol-2-yl)-4, 6-bis (1-methyl-1-phenylethyl) phenol, and hexadecyl 3, 5-di-tert-butyl-4-hydroxybenzoate, and a method for preparing the same. The ethylene-vinyl acetate copolymer is added as a partial plasticizer system, so that the risk that the adhesive performance of the optical fiber is reduced after the plasticizer is separated out and mixed with the hot melt adhesive is reduced, and the service life of a fixed position can be further prolonged; the two anti-UV agents are compounded for use, so that the weather resistance of the material can be effectively improved, yellowing caused by UV is reduced, and the service life of the transparent optical fiber broadband is prolonged.

Description

Technical Field

[0001] The present application relates to the field of polymer materials, and in particular to a polyvinyl chloride material and a preparation method thereof. Background Art

[0002] Optical fibers are mostly white or other colorful non-transparent materials. In the field of home broadband wiring, transparent optical fibers make optical fiber wiring almost imperceptible to the naked eye, thus maintaining the beauty of the interior. The diameter of this transparent optical fiber is only 0.9 mm and it can be bent at 90 degrees. Although the price is higher than ordinary optical fibers, it provides better concealment and convenience. Transparent optical fibers are more transparent than ordinary optical fibers, so the choice of substrate is also different. Polyvinyl chloride (PVC) is a commonly used material for optical fibers.

[0003] Most of the existing polyvinyl chloride optical fiber materials are solid color. Transparent PVC materials are prepared by mixing materials with refractive indices close to the base materials. Solid color PVC materials have no requirements for refractive index. There is no transparent PVC material that can simultaneously meet the physical property requirements such as diameter, transparency, and aging resistance for use as broadband optical fiber.

[0004] Therefore, developing a polyvinyl chloride material that can meet the requirements of high transparency, UV resistance, and strong anti-aging performance is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, the present application provides a polyvinyl chloride material that simultaneously has UV resistance, flame retardancy, water boiling resistance, aging resistance and transparency requirements.

[0006] Broadband transparent optical fiber is a new type of optical fiber technology, which has the characteristics of higher transparency and better bending resistance. This optical fiber makes wiring in home or business environments more convenient and concealed, because it can be quickly wired to doors and windows, corners, skirtings, beams and columns, etc., solving the problem of optical fiber installation after decoration. The advantage of transparent optical fiber is that it can be fixed to the wall by hot melting without destroying the beauty of the wall, which is convenient for construction while being concealed and convenient.

[0007] The present application provides a polyvinyl chloride material, comprising, by mass: 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of plasticizer, 1 to 6 parts of stabilizer, 0.5 to 1.5 parts of anti-UV agent, 0.5 to 1.5 parts of lubricant, 4 to 8 parts of flame retardant, 5 to 15 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of processing aid and 0.2 to 0.5 parts of color powder;

[0008] The anti-UV agents include 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol (UV-234) and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl (UV-2908).

[0009] The present application compounds the polyvinyl chloride material with 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of plasticizer, 1 to 6 parts of stabilizer, 0.5 to 1.5 parts of anti-UV agent, 0.5 to 1.5 parts of lubricant, 4 to 8 parts of flame retardant, 5 to 15 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of processing aid and 0.2 to 0.5 parts of color powder raw material, which reduces the risk of decreased adhesive performance of the optical fiber due to the precipitation of plasticizer and mixing with hot melt adhesive, effectively improves the weather resistance of the material, reduces yellowing caused by UV, and thus can extend the service life of the fixed position.

[0010] The polyvinyl chloride material provided in the present application includes an anti-UV agent, and the anti-UV agent includes 2-(2H-benzotriazole-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol (UV-234) and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester (UV-2908). The anti-UV agent is a compound of two anti-UV agents, UV-2908 and UV-234, which can effectively improve the weather resistance of the material, and at the same time, it hardly affects the transparency of the polyvinyl chloride material, reduces the yellowing caused by UV, and thus prolongs the service life of the transparent optical fiber broadband.

[0011] In some specific implementations, the mass fraction of the anti-UV agent is 0.5 to 1.5 parts, which can be 0.5, 0.8, 0.9, 1, 1.1, 1.2, 1.3, or 1.5 parts. In some specific implementations, the mass ratio of 2-(2H-benzotriazole-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol to 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl is 1:(0.5-2), preferably 1:(0.8-1.5).

[0012] The polyvinyl chloride material provided in the present application includes ethylene-vinyl acetate copolymer elastomer. In some specific implementations, the mass fraction of the ethylene-vinyl acetate copolymer elastomer is 5 to 15 parts, which can be 5, 6, 8, 10, 11, 12, 15, preferably 8 to 10 parts. The use of ethylene-vinyl acetate copolymer elastomer (EVA) can give the material flexibility while reducing the amount of plasticizer, reducing the risk of decreased adhesive performance of the optical fiber due to the precipitation of plasticizer and mixing with hot melt adhesive, thereby extending the service life of the fixed position.

[0013] The polyvinyl chloride material provided in the present application includes polyvinyl chloride. In some specific implementations, the number average molecular weight of the polyvinyl chloride is 50,000 to 100,000, preferably 50,000 to 80,000.

[0014] In some specific implementations, the mass fraction of the polyvinyl chloride is 55 to 65 parts, which can be 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65 parts, and is preferably 58 to 62 parts.

[0015] The polyvinyl chloride material provided in the present application includes a plasticizer. In some specific implementations, the plasticizer includes but is not limited to one or more of trioctyl trimellitate, dioctyl terephthalate or polyester W-8000. The present application has no special requirements for the selection of the plasticizer.

[0016] In some specific implementations, the mass fraction of the plasticizer is 10 to 25 parts, which can be 10, 12, 13, 14, 15, 18, 20, 22, 24, 25 parts, and is preferably 18 to 21 parts.

[0017] The polyvinyl chloride material provided in the present application includes a stabilizer. In some specific implementations, the stabilizer includes but is not limited to an organic tin and / or calcium zinc stabilizer. The present application has no special requirements for the selection of the stabilizer, and a calcium zinc stabilizer is preferred.

[0018] In some specific implementations, the weight percentage of the stabilizer is 1 to 6 parts, and can be 1, 2, 3, 4, 5, or 6 parts, and is preferably 1.8 to 5 parts.

[0019] The polyvinyl chloride material provided in the present application includes a lubricant. In some specific implementations, the lubricant includes an external lubricant and an internal lubricant; the external lubricant includes but is not limited to high-density oxidized polyethylene wax, and the internal lubricant includes but is not limited to polyol fatty acid complex ester liquid. The present application has no special requirements for the selection of the external lubricant and the internal lubricant.

[0020] In some specific implementations, the mass fraction of the lubricant is 0.5 to 1.5 parts, and can be 0.5, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.5, and is preferably 0.7 to 0.9 parts.

[0021] The polyvinyl chloride material provided in the present application includes a flame retardant. In some specific implementations, the flame retardant includes a phosphate ester, and the flame retardant is a low-odor liquid phosphate ester, which improves the flame retardancy of the material while hardly affecting the transparency.

[0022] In some specific implementations, the mass fraction of the flame retardant is 4 to 8 parts, and can be 4, 5, 6, 7, or 8 parts, and is preferably 5 to 6 parts.

[0023] The polyvinyl chloride material provided in the present application includes a processing aid. In some specific implementations, the processing aid includes but is not limited to ACR material. The present application has no special requirements for the selection of the processing aid. The processing aid is ACR material PA-20 from Japan Suzuki, which can promote the plasticization of transparent PVC materials and effectively improve the transparency and brightness of transparent PVC.

[0024] In some specific implementations, the mass fraction of the processing aid is 1 to 3 parts, and can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, and is preferably 1 to 2 parts.

[0025] The polyvinyl chloride material provided in the present application includes color powder. In some specific implementations, the color powder includes but is not limited to one or more of ultramarine blue, ultramarine violet or fluorescent whitening agent. The present application has no special requirements for the selection of color powder.

[0026] In some specific implementations, the mass fraction of the color powder is 0.2 to 0.5 parts, and can be 0.2, 0.3, 0.4, 0.5 parts, and preferably 0.3 to 0.4 parts.

[0027] In some specific implementations, the polyvinyl chloride material further includes, by weight, 0.5 to 1 part of an antioxidant and 1 to 3 parts of an auxiliary stabilizer. In some specific implementations, the antioxidant includes, but is not limited to, a hindered phenol antioxidant and / or a phosphite antioxidant, and the present application has no special requirements for the selection of the antioxidant. In some specific implementations, the hindered phenol antioxidant includes, but is not limited to, 2,6-di-tert-butyl-4-methylphenol, antioxidant 1010, or antioxidant 1076. In some specific implementations, the phosphite antioxidant includes, but is not limited to, a phenol-free phosphite antioxidant, a low-phenol phosphite antioxidant, or a phenol-containing phosphite antioxidant. The auxiliary stabilizer includes, but is not limited to, soybean oil, and the present application has no special requirements for the selection of the auxiliary stabilizer. The transparent optical fiber prepared from the polyvinyl chloride material provides better concealment and convenience while meeting the physical property requirements.

[0028] In some specific implementations, the plasticizer includes polyester W-8000; the stabilizer includes calcium zinc stabilizer. In some specific implementations, the polyvinyl chloride material includes, by mass, 58 to 62 parts of polyvinyl chloride, 18 to 21 parts of plasticizer, 3 to 5 parts of stabilizer, 0.5 to 1 part of UV inhibitor, 0.7 to 0.9 parts of lubricant, 5 to 6 parts of flame retardant, 8 to 10 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 2 parts of processing aid and 0.3 to 0.4 parts of color powder.

[0029] The present application also provides a method for preparing a polyvinyl chloride material, comprising:

[0030] Polyvinyl chloride, a plasticizer, a stabilizer, an anti-UV agent, a lubricant, a flame retardant and a color powder are mixed and stirred, and then mixed with an ethylene-vinyl acetate copolymer elastomer and a processing aid and extruded to obtain a polyvinyl chloride material.

[0031] The present application first mixes polyvinyl chloride, plasticizer, stabilizer, anti-UV agent, lubricant, flame retardant and toner and stirs them to obtain a mixture a. In some specific implementations, the stirring temperature is 110° C. to 130° C. In some specific implementations, polyvinyl chloride, stabilizer, anti-UV agent and lubricant are first mixed uniformly, and plasticizer is added while stirring, and flame retardant and toner are added after the temperature is raised to 110° C. to 130° C.

[0032] The present application then extrude the mixture a with ethylene-vinyl acetate copolymer elastomer and processing aid to obtain a polyvinyl chloride material. In some specific implementations, the extrusion temperature is 140° C. to 160° C. In some specific implementations, the extrusion is performed in a screw extruder.

[0033] This application adds ethylene-vinyl acetate copolymer as part of the plasticizer system, which reduces the risk of the optical fiber's adhesive performance degradation caused by the plasticizer precipitation and mixing with the hot melt adhesive, thereby extending the service life of the fixed position. Two UV agents, UV-2908 and UV-234, are used in combination to effectively improve the material's weather resistance and reduce UV-induced yellowing, thereby extending the service life of the transparent optical fiber broadband. DETAILED DESCRIPTION

[0034] It should be understood that the expression "one or more of..." includes each of the items recited after the expression individually and in various different combinations of two or more of the recited items, unless otherwise understood from the context and usage. The expression "and / or" in combination with three or more recited items should be understood to have the same meaning, unless otherwise understood from the context.

[0035] The use of the terms "comprising", "having" or "containing", including their grammatical synonyms, should generally be understood as open and non-restrictive, for example not excluding other unrecited elements or steps, unless otherwise specifically stated or otherwise understood from the context.

[0036] It should be understood that the order of steps or the order in which certain actions are performed is not important as long as the application is still operable. In addition, two or more steps or actions can be performed simultaneously.

[0037] The use of any and all examples or exemplary language, such as "for example" or "including", herein is intended only to better illustrate the present application and does not limit the scope of the present application unless the claims are set forth. No language in this specification should be construed as indicating that any non-claimed element is essential to the practice of the present application.

[0038] In addition, the numerical ranges and parameters used to define the present application are approximate values, and the relevant values ​​in the specific embodiments have been presented as accurately as possible. However, any numerical value inherently inevitably contains standard deviations due to individual test methods. Therefore, unless otherwise expressly stated, it should be understood that all ranges, quantities, values ​​and percentages used in this disclosure are modified by "about". Here, "about" generally means that the actual value is within plus or minus 10%, 5%, 1% or 0.5% of a specific value or range.

[0039] The present application is further described below in conjunction with the following embodiments. The protection scope of the present application is not limited by the following embodiments.

[0040] Example 1

[0041] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-234 respectively, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0042] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, add PA-20 and EVA elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0043] Example 2

[0044] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of TOTM plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-234 respectively, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0045] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, add PA-20 and EVA elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0046] Example 3

[0047] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of W-8000 plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-234 respectively, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0048] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, add PA-20 and EVA elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0049] Example 4

[0050] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of W-8000 plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-234 respectively, 0.7 parts of lubricant, 10 parts of EVA HP741 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0051] The preparation method is consistent with Example 4.

[0052] Example 5

[0053] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 21 parts of DOTP plasticizer, 1.8 parts of organic tin stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-234 respectively, 0.9 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0054] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, add PA-20 and EVA elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0055] Example 6

[0056] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 21 parts of DOTP plasticizer, 1.8 parts of organic tin stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-234 respectively, 0.9 parts of lubricant, 10 parts of EVA HP741 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0057] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, add PA-20 and EVA elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0058] Comparative Example 1

[0059] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 1 part of UV-234 anti-UV agent, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0060] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to a mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, add PA-20 and EVA HP441 elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through a screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0061] Comparative Example 2

[0062] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 1 part of UV-2908 anti-UV agent, 0.7 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0063] Preparation method: polyvinyl chloride, stabilizer, UV-2908 anti-UV agent and lubricant are added to the mixing tank in sequence and mixed evenly, and then the plasticizer is added while stirring. After the plasticizer is completely added, the stirring rate is increased. When the temperature rises to 120°C, the flame retardant and color powder are added in sequence. After mixing evenly, when the temperature rises to 125°C, PA-20 and EVA HP441 elastomer are added in sequence. After mixing evenly, the mixture is put into the extruder hopper and extruded by the screw extruder to prepare the polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0064] Comparative Example 3

[0065] The present embodiment provides a polyvinyl chloride material, which includes, by mass, 64 parts of polyvinyl chloride, 22 parts of DOTP plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts of anti-UV agents UV-2908 and UV-234 respectively, 0.7 parts of lubricant, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0066] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, add PA-20 when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0067] Comparative Example 4

[0068] The comparative example provides a polyvinyl chloride material, which includes, by weight: 58 parts of polyvinyl chloride, 22 parts of DOTP plasticizer, 1.8 parts of organic tin stabilizer, 0.9 parts of lubricant, 10 parts of EVA HP441 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0069] Preparation method: Add polyvinyl chloride, stabilizer and lubricant to a mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, mix evenly, then add PA-20 and EVA HP441 elastomer in sequence when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through a screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0070] Comparative Example 5

[0071] This comparative example provides a polyvinyl chloride material, which includes, by mass, 65 parts of polyvinyl chloride, 24 parts of DOTP plasticizer, 1.8 parts of organic tin stabilizer, 0.9 parts of lubricant, 0.5 parts of anti-UV agents UV-2908 and UV-234 respectively, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0072] Preparation method: Add polyvinyl chloride, stabilizer, anti-UV agent and lubricant to the mixing tank in sequence and mix them evenly, then add plasticizer while stirring, increase the stirring rate after the plasticizer is completely added, add flame retardant and color powder in sequence when the temperature rises to 120°C, add PA-20 when the temperature rises to 125°C, mix evenly, put into the extruder hopper, and extrude through the screw extruder to prepare polyvinyl chloride material. The temperature of the extruder screw is set to 140-160°C.

[0073] Comparative Example 6

[0074] The comparative example provides a polyvinyl chloride material, which includes, by mass, 58 parts of polyvinyl chloride, 18 parts of W-8000 plasticizer, 5 parts of calcium zinc stabilizer, 0.5 parts of UV-resistant agents UV-2908 and UV-531 respectively, 0.7 parts of lubricant, 10 parts of EVA HP741 elastomer, 2 parts of PA-20 additive, 5 parts of flame retardant, and 0.3 parts of color powder.

[0075] The preparation method is consistent with Example 4.

[0076] The performance test of the polyvinyl chloride materials prepared in Examples 1-6 and Comparative Examples 1-6 was carried out, and the test method was as follows:

[0077] Tensile strength: Test method refers to GB / T 1040;

[0078] Elongation at break: Test method refers to GB / T 1040;

[0079] UV color difference △E, residual tensile strength after UV, residual elongation after UV: ISO 4892-2cycle 5, irradiated with xenon arc lamp (340nm), light intensity of 0.45W / m 2 / nm, 102 minutes of light exposure at 65±3℃ (50%±RH), 18 minutes of spraying and light exposure; a total of 500h, mechanical properties are not less than 50% of the previous ones, color difference ≤6, test method refers to ISO 105-A02;

[0080] Precipitation after boiling: Boiled in water at 70℃*168H, no obvious precipitation on the surface;

[0081] Color difference △E after aging, residual rate of tensile strength after aging, residual rate of elongation at break after aging: 85℃*500H, color difference value ≤6, residual rate of tensile elongation ≥75%;

[0082] Transparency: 2mm sheet transparency ≥80%, test method refers to ASTM D1003;

[0083] Flame retardant performance: 1.5mm flame retardant V0, test method refers to UL94.

[0084] The test results are shown in Table 1-2.

[0085] Table 1

[0086]

[0087] Table 2

[0088]

[0089]

[0090] It can be seen from Tables 1-2 that the polyvinyl chloride material prepared using the technical solution of the present application has obvious improvements in anti-aging, anti-ultraviolet and transparency. Compared with the embodiment, no anti-UV agent is added to Comparative Example 4. It can be seen that the anti-UV performance of the system of Comparative Example 4 is significantly worse. At the same time, the effect of using a single anti-UV agent in Comparative Examples 1-2 is significantly worse than the effect of using the two anti-UV agents described in the present application at the same time. Comparative Example 6 uses a combination of compound anti-UV agents that are not in the present technical solution, and there is also a significant performance decrease compared to the embodiment. Because different types of anti-UV agents have different absorption degrees of the ultraviolet band, the temperature resistance is also different. For the anti-UV test conditions and evaluation methods described in the present invention, the selected materials are the most matched. Without the addition of EVA elastomer, the precipitation of Comparative Examples 3 and 5 after boiling is significantly worse, which is not conducive to subsequent use.

[0091] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A polyvinyl chloride material, characterized in that: The composition comprises, by mass: 55 to 65 parts of polyvinyl chloride, 10 to 25 parts of plasticizer, 1 to 6 parts of stabilizer, 0.5 to 1.5 parts of anti-UV agent, 0.5 to 1.5 parts of lubricant, 4 to 8 parts of flame retardant, 5 to 15 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 3 parts of processing aid and 0.2 to 0.5 parts of color powder; The anti-UV agent includes 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl.

2. The polyvinyl chloride material according to claim 1, characterized in that: The mass ratio of the 2-(2H-benzotriazole-2-yl)-4,6-di(1-methyl-1-phenylethyl)phenol to 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl is 1:(0.5-2).

3. The polyvinyl chloride material according to claim 1, characterized in that: The number average molecular weight of the polyvinyl chloride is 50,000 to 100,000.

4. The polyvinyl chloride material according to claim 1, characterized in that: The plasticizer includes one or more of trioctyl trimellitate, dioctyl terephthalate or polyester W-8000; the stabilizer includes organic tin and / or calcium zinc stabilizer; the lubricant includes an external lubricant and an internal lubricant; the external lubricant includes high-density oxidized polyethylene wax, and the internal lubricant includes a polyol fatty acid complex ester liquid; the flame retardant includes a phosphate ester; and the processing aid includes an ACR material.

5. The polyvinyl chloride material according to claim 1, characterized in that: The polyvinyl chloride material further comprises, by weight: 0.5 to 1 part of an antioxidant and 1 to 3 parts of an auxiliary stabilizer.

6. The polyvinyl chloride material according to claim 5, characterized in that: The antioxidant includes hindered phenol antioxidant and / or phosphite antioxidant; the auxiliary stabilizer includes soybean oil.

7. The polyvinyl chloride material according to claim 1, characterized in that: The plasticizer includes polyester W-8000; the stabilizer includes calcium zinc stabilizer.

8. The polyvinyl chloride material according to claim 1, characterized in that: The composition comprises, by mass, 58 to 62 parts of polyvinyl chloride, 18 to 21 parts of plasticizer, 3 to 5 parts of stabilizer, 0.5 to 1 part of anti-UV agent, 0.7 to 0.9 part of lubricant, 5 to 6 parts of flame retardant, 8 to 10 parts of ethylene-vinyl acetate copolymer elastomer, 1 to 2 parts of processing aid and 0.3 to 0.4 parts of color powder.

9. A method for preparing a polyvinyl chloride material, characterized in that: include: Polyvinyl chloride, a plasticizer, a stabilizer, an anti-UV agent, a lubricant, a flame retardant and a color powder are mixed and stirred, and then mixed with an ethylene-vinyl acetate copolymer elastomer and a processing aid and extruded to obtain a polyvinyl chloride material.

10. The preparation method according to claim 8, characterized in that: The stirring temperature is 110°C to 130°C; the extrusion temperature is 140°C to 160°C.

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