Halogen-free flame-retardant elastomer material as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of elastomer materials, and particularly relates to a halogen-free flame-retardant elastomer material as well as a preparation method and application thereof. The halogen-free flame-retardant elastomer material comprises a styrene elastomer, a polyolefin elastomer, metallocene linear low-density polyethylene, a flame retardant and an auxiliary agent, the auxiliary agent comprises an anti-UV agent, and the anti-UV agent comprises 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl) benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenethyl)-4-(1, 1, 3, 3-tetramethylbutyl) phenol and poly (4-hydroxy-2, 2, 6, 6-tetramethyl-1-piperidine ethanol) succinate. The styrene elastomer, the polyolefin elastomer and the metallocene linear low density polyethylene are matched, and the flame retardant and the specific type of anti-UV agent are combined, so that the flexible elastomer material with good flame retardance, UV resistance and temperature resistance can be obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of elastomer materials, and in particular relates to a halogen-free flame-retardant elastomer material and a preparation method and application thereof. Background Art

[0002] As people's living standards continue to improve, the demand for indoor and outdoor simulated green plant decorations is increasing. The simulated leaf materials on simulated green plants need to have low hardness (50-70A) materials to show the natural drooping state of real leaves. At the same time, most of the simulated green plant decoration products are placed inside buildings, so there are corresponding requirements for the flame retardant properties of simulated green plant products. In addition, simulated green plant decoration products need to be placed for long-term viewing, so the materials used need to have UV resistance and temperature resistance to ensure that they will not have abnormal problems such as discoloration, deformation, and powdering during their service life.

[0003] At present, the artificial leaves of green plants on the market are made of polyethylene (PE), thermoplastic elastomer (TPE), and polyvinyl chloride (PVC) materials, each of which has different defects. For example, although PE materials can have flame retardant properties, their hardness is generally 50-55D, which is relatively hard; although TPE materials can meet the requirements of low hardness, due to the large amount of white mineral oil filled inside, their flame retardant properties are poor and cannot meet the high flame retardant requirements of artificial leaves, and the addition of white mineral oil will lead to poor UV resistance; PVC materials can meet the requirements for flame retardancy and hardness, but they will emit a lot of black smoke when burning, which will cause major obstacles to the escape of people in the event of a fire. That is, the current artificial leaves cannot take into account softness, flame retardancy, UV resistance and temperature resistance at the same time.

[0004] Therefore, it is of great significance to provide a soft elastomeric material with good flame retardancy, UV resistance and temperature resistance. Summary of the invention

[0005] The present invention aims to solve one or more technical problems existing in the above-mentioned prior art and at least provide a beneficial choice. Specifically, the present invention provides an elastomeric material with low hardness, which can meet the demand for softness of simulated leaves and has good flame retardancy, UV resistance and temperature resistance.

[0006] The inventive concept of the present invention: the elastomeric material of the present invention includes styrene elastomer, polyolefin elastomer, metallocene linear low-density polyethylene, flame retardant, and auxiliary agent; the auxiliary agent includes an anti-UV agent, and the anti-UV agent includes 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester. The present invention adopts styrene elastomer as the base resin, and is matched with polyolefin elastomer and metallocene linear low-density polyethylene. The components have good compatibility, and are combined with flame retardants and specific types of anti-UV agents. The components work together to obtain a soft elastomeric material with excellent flame retardancy, UV resistance and temperature resistance, which can be used as a simulated leaf material.

[0007] Therefore, a first aspect of the present invention provides a halogen-free flame retardant elastomeric material.

[0008] Specifically, the halogen-free flame-retardant elastomeric material includes styrene elastomer, polyolefin elastomer, metallocene linear low-density polyethylene, flame retardant, and additive;

[0009] The auxiliary agent includes an anti-UV agent, and the anti-UV agent includes 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) succinate.

[0010] Preferably, the styrene-based elastomer includes at least one of hydrogenated styrene-butadiene block copolymer (SEBS) and hydrogenated ethylene thermoplastic elastomer (SOE).

[0011] Specifically, the styrene elastomer is a type of SEBS and SOE that can be processed without filling with white oil, and the types such as 6014, 8245D, YH-688, S1606 can be selected, and TSRC SEBS-8245D is preferred. The specific type of styrene elastomer can make the product have a low hardness, so that the simulated leaf product has a natural drooping state when placed.

[0012] Preferably, the Shore hardness of the polyolefin elastomer is 80-90A.

[0013] Preferably, the polyolefin elastomer (POE) has a melt index of 10-50 g / 10 min at 190° C. and 2.16 kg.

[0014] Specifically, the use of POE elastomers with a Shore hardness of 80-90A can ensure the temperature resistance of the product. At the same time, POE elastomers with a higher melt index are beneficial to improving the fluidity of the product and facilitating product injection molding.

[0015] Preferably, the Shore hardness of the metallocene linear low-density polyethylene is 46-50D.

[0016] Preferably, the metallocene linear low-density polyethylene can be selected from models such as 5220G, 3518, SP1520, SP0540, etc., preferably Mitsui SP0540. Metallocene linear low-density polyethylene has good compatibility with POE elastomer. On the premise of avoiding the hardness of the product becoming higher, the combination of the two can improve the tensile properties and temperature resistance of the product.

[0017] Preferably, in the anti-UV agent, the mass ratio of the 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is (2.5-3.5):(2.5-3.5):(2.5-3.5):1.

[0018] Further preferably, in the anti-UV agent, the mass ratio of the 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is (2.7-3.3):(2.7-3.3):(2.7-3.3):1.

[0019] More preferably, in the anti-UV agent, the mass ratio of the 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 3:3:3:1.

[0020] Preferably, the flame retardant includes at least one of a phosphorus-based flame retardant, a nitrogen-based flame retardant, and a phosphorus-nitrogen-based flame retardant.

[0021] Preferably, the phosphorus-based flame retardant includes at least one of aluminum diethylphosphinate, aluminum dibutylphosphinate, aluminum diphenylphosphinate, aluminum hypophosphite, resorcinol bis(diphenyl phosphate), and bisphenol A-bis(diphenyl phosphate); further preferably, the phosphorus-based flame retardant includes at least one of aluminum diethylphosphinate, aluminum hypophosphite, resorcinol bis(diphenyl phosphate), and bisphenol A-bis(diphenyl phosphate).

[0022] Preferably, the nitrogen-based flame retardant includes melamine cyanurate.

[0023] Preferably, the phosphorus-nitrogen flame retardant includes at least one of melamine pyrophosphate, melamine polyphosphate, ammonium polyphosphate, and piperazine pyrophosphate; further preferably, the phosphorus-nitrogen flame retardant includes at least one of melamine pyrophosphate and piperazine pyrophosphate.

[0024] Preferably, the flame retardant includes aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate and piperazine pyrophosphate.

[0025] Preferably, in the flame retardant, the mass ratio of the aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate and piperazine pyrophosphate is 1:(0.8-1.2):(1.6-2.5):(3-5).

[0026] Further preferably, in the flame retardant, the mass ratio of the aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate is 1:(0.9-1.1):(1.8-2.2):(3.5-4.5).

[0027] More preferably, in the flame retardant, the mass ratio of aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate is 1:1:2:4.

[0028] Preferably, in terms of mass percentage, the elastomeric material comprises 18-33% of styrene elastomer, 18-27% of POE elastomer, 4.5-11% of metallocene linear low-density polyethylene, 35-50% of flame retardant, and 1-5.5% of additive.

[0029] Further preferably, the elastomeric material comprises, by mass percentage, 20-30% styrene elastomer, 20-25% POE elastomer, 5-10% metallocene linear low-density polyethylene, 40-45% flame retardant, and 1-5% additive.

[0030] Preferably, the auxiliary agent also includes at least one of a lubricant, an antioxidant and a compatibilizer.

[0031] Preferably, the lubricant includes at least one of silicone masterbatch, fatty acid amide, erucic acid amide, ethylene bis stearic acid amide, pentaerythritol stearate, and polyethylene wax; further preferably, the lubricant is erucic acid amide, which promotes dispersion of various components of the product and demolding during injection molding, and can make the product have a smooth feel.

[0032] Preferably, the antioxidant includes at least one of a hindered phenol antioxidant and a phosphite antioxidant; further preferably, the antioxidant includes a hindered phenol antioxidant and a phosphite antioxidant, such as antioxidant B215, which can prevent the components of the formula from decomposing during processing in a twin-screw extruder, thereby increasing the service life of the product.

[0033] Preferably, the compatibilizer includes at least one of maleic anhydride grafted polyethylene, maleic anhydride grafted SEBS, and maleic anhydride grafted polyolefin elastomer; further preferably, the compatibilizer is selected from maleic anhydride grafted POE.

[0034] Preferably, the grafting rate of the compatibilizer is 0.45-1.6%; further preferably, the grafting rate of the compatibilizer is 0.5-1.5%.

[0035] Specifically, the compatibilizer can promote the compatibility of various groups of products and improve the mechanical properties of the products.

[0036] The second aspect of the present invention provides a method for preparing the halogen-free flame-retardant elastomer material according to the first aspect of the present invention.

[0037] Specifically, the method for preparing the halogen-free flame-retardant elastomer material comprises the following steps:

[0038] The raw material components are mixed to obtain a mixture; the mixture is melt-extruded to obtain the elastomeric material.

[0039] Preferably, the temperature of the melt extrusion is 110-190°C; further preferably, the temperature of the melt extrusion is 120-180°C.

[0040] Preferably, a twin-screw extruder is used for the melt extrusion, and the aspect ratio of the twin-screw extruder is (36-56):1; the main engine speed of the twin-screw extruder is 220-350r / min.

[0041] Further preferably, a twin-screw extruder is used for the melt extrusion, and the aspect ratio of the twin-screw extruder is (36-52):1; the main engine speed of the twin-screw extruder is 240-320r / min.

[0042] More preferably, the aspect ratio of the twin-screw extruder is 44:1; and the main engine speed of the twin-screw extruder is 270-290 r / min.

[0043] A third aspect of the present invention provides a simulated leaf.

[0044] Specifically, the artificial leaf comprises the halogen-free flame-retardant elastomer material described in the first aspect of the present invention.

[0045] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0046] (1) The present invention adopts styrene elastomer as the base resin, and is matched with polyolefin elastomer and metallocene linear low-density polyethylene. The components have good compatibility with each other, and are combined with flame retardants and specific types of anti-UV agents. The components work together to obtain a soft elastomeric material with excellent flame retardancy, UV resistance and temperature resistance, which can be used as a simulated leaf material.

[0047] (2) The present invention can make the elastomer material meet the flame retardant requirement of UL94 V0 (0.75 mm) by using a specific type of flame retardant compound. DETAILED DESCRIPTION

[0048] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0049] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0050] The information of the raw materials used in the examples and comparative examples of the present invention is shown in Table 1.

[0051] Table 1: Information of raw materials used in the examples and comparative examples of the present invention

[0052]

[0053]

[0054] Example 1

[0055] A halogen-free flame-retardant elastomer material, comprising, by mass percentage, 25% of a styrene elastomer (8245D), 23% of a POE elastomer (8402), 7% of a metallocene linear low-density polyethylene, 40% of a flame retardant (aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate in a mass ratio of 1:1:2:4), 0.4% of a lubricant, 0.1% of an antioxidant, and a relative The solvent is 2%, the anti-UV agent is 2.5% (the mass ratio of 2-hydroxy-4-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol, and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 3:3:3:1).

[0056] A method for preparing a halogen-free flame-retardant elastomer material comprises the following steps:

[0057] The raw materials are mixed evenly to obtain a mixture; the mixture is added into a twin-screw extruder, extruded and granulated to obtain a halogen-free flame-retardant elastomer material for simulated leaves; wherein the aspect ratio of the twin-screw extruder is 44:1, and the set temperatures of each temperature zone of the twin-screw extruder are: 140°C, 160°C, 170°C, 170°C, 170°C, 170°C, 165°C, 165°C, 165°C, 160°C, and the main engine speed of the twin-screw extruder is 270r / min.

[0058] Example 2

[0059] A halogen-free flame-retardant elastomer material, comprising, by mass percentage, 30% of a styrene elastomer (8245D), 20% of a POE elastomer (8402), 5% of a metallocene linear low-density polyethylene, 40% of a flame retardant (aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate in a mass ratio of 1:1:2:4), 0.4% of a lubricant, 0.1% of an antioxidant, and a relative The solvent is 2%, the anti-UV agent is 2.5% (the mass ratio of 2-hydroxy-4-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol, and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 3:3:3:1).

[0060] The preparation method of the halogen-free flame-retardant elastomer material in Example 2 is the same as that in Example 1.

[0061] Example 3

[0062] A halogen-free flame-retardant elastomer material, comprising, by mass percentage, 20% of a styrene elastomer (8245D), 25% of a POE elastomer (8402), 10% of a metallocene linear low-density polyethylene, 40% of a flame retardant (aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate in a mass ratio of 1:1:2:4), 0.4% of a lubricant, 0.1% of an antioxidant, and a relative The solvent is 2%, the anti-UV agent is 2.5% (the mass ratio of 2-hydroxy-4-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol, and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 3:3:3:1).

[0063] The preparation method of the halogen-free flame-retardant elastomer material in Example 3 is the same as that in Example 1.

[0064] Example 4

[0065] A halogen-free flame-retardant elastomer material, comprising, by mass percentage, 23% of a styrene elastomer (8245D), 20% of a POE elastomer (8402), 7% of a metallocene linear low-density polyethylene, 45% of a flame retardant (aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate in a mass ratio of 1:1:2:4), 0.4% of a lubricant, 0.1% of an antioxidant, and a relative The solvent is 2%, the anti-UV agent is 2.5% (the mass ratio of 2-hydroxy-4-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol, and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 3:3:3:1).

[0066] The preparation method of the halogen-free flame-retardant elastomer material in Example 4 is the same as that in Example 1.

[0067] Comparative Example 1

[0068] The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 uses an anti-UV agent composed of 2-hydroxy-4-n-octyloxybenzophenone and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester (the mass ratio of 2-hydroxy-4-n-octyloxybenzophenone and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 4:1) to replace the anti-UV agent of Example 1 in equal amounts, and the rest is the same as Example 1.

[0069] Comparative Example 2

[0070] The only difference between Comparative Example 2 and Example 3 is that Comparative Example 2 uses an equal amount of POE elastomer (8402) to replace the styrene elastomer (8245D), and the rest is the same as Example 3.

[0071] Comparative Example 3

[0072] The only difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses an equal amount of styrene elastomer (8245D) to replace POE elastomer (8402), and the rest is the same as Example 1.

[0073] Comparative Example 4

[0074] The only difference between Comparative Example 4 and Example 2 is that Comparative Example 4 uses an equal amount of POE elastomer (8402) to replace the metallocene linear low-density polyethylene, and the rest is the same as Example 1.

[0075] Comparative Example 5

[0076] Comparative Example 5 is an existing TPE material system. In terms of mass percentage, the elastomer material includes 19% styrene elastomer (6154), 28% white oil, 8% polypropylene, 40% flame retardant (the mass ratio of aluminum diethylphosphinate, bisphenol A-bis(diphenyl phosphate), melamine pyrophosphate, and piperazine pyrophosphate is 1:1:2:4), 0.4% lubricant, 0.1% antioxidant, 2% compatibilizer, and 2.5% UV inhibitor (2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol, and polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is 3:3:3:1).

[0077] The method for preparing an elastomeric material comprises the following steps:

[0078] All raw materials are mixed evenly to obtain a mixture; the mixture is added into a twin-screw extruder, extruded and granulated to obtain a halogen-free flame-retardant elastomer material for simulated leaves; wherein, the aspect ratio of the twin-screw extruder is 44:1, and the set temperatures of each temperature zone of the twin-screw extruder are: 140°C, 180°C, 190°C, 190°C, 190°C, 190°C, 185°C, 185°C, 185°C, 185°C, 180°C, and the main engine speed of the twin-screw extruder is 290r / min.

[0079] Performance Testing

[0080] The performance tests were conducted on the elastomeric materials of Examples 1-4 and Comparative Examples 1-5, and the test items, test standards, and test results are shown in Table 2.

[0081] Table 2: Test items, test standards, and test results of the elastomeric materials of Examples 1-4 and Comparative Examples 1-5

[0082]

[0083]

[0084] Among them, the xenon lamp irradiation test conditions in Table 2 are as follows:

[0085] Xenon lamp weathering instrument Xe-3, manufacturer Q-lab;

[0086] Irradiation intensity 0.55w / m 2 , the wavelength of the lamp is 340nm, and the filter is DAYLIGHT-Q;

[0087] Humidity 30%, blackboard temperature 55°C;

[0088] Test duration: 1000h continuous irradiation;

[0089] Judgment requirement: △E≤2.0 is qualified.

[0090] It can be seen from Table 2 that the hardness of the elastomeric material prepared by the present invention is 50-70A, and it has good flame retardancy, UV resistance, and temperature resistance. The flame retardancy can meet UL94 V0 (0.75mm), which can meet the requirements of simulated leaves for softness, flame retardancy, UV resistance, and temperature resistance.

[0091] Comparative Example 1 uses other types of anti-UV agents to replace the anti-UV agent in Example 1 in equal amounts, so that the UV resistance of Comparative Example 1 is significantly worse than that of Example 1 and is unqualified. This indicates that the use of a specific type of anti-UV agent in combination in the present invention can significantly improve the anti-UV performance.

[0092] Comparative Example 2 uses an equal amount of POE elastomer (8402) to replace the styrene elastomer (8245D), that is, it does not contain styrene elastomer, so that the hardness of the product of Comparative Example 2 is significantly increased, and the elongation at break is significantly decreased, which cannot meet the softness requirements of the simulated leaves.

[0093] Comparative Example 3 uses an equal amount of styrene elastomer (8245D) to replace POE elastomer (8402), that is, it does not contain POE elastomer (8402), so that the temperature resistance and UV resistance of the elastomer material of Comparative Example 3 are reduced, and the melt index is low, and it cannot be injection molded.

[0094] Comparative Example 4 uses an equal amount of POE elastomer (8402) to replace the metallocene linear low-density polyethylene, which reduces the tensile properties and temperature resistance of the elastomer material in Comparative Example 4.

[0095] It can be seen from Comparative Examples 2-4 that styrene elastomer, POE elastomer and metallocene linear low-density polyethylene are all indispensable. Only when the three work together can the elastomer material have good flame retardancy, UV resistance and temperature resistance, and be soft.

[0096] Comparative Example 5 uses a TPE material system. When the ratio of flame retardants is the same, the flame retardancy cannot even meet UL94V0 (3.0mm), and the UV resistance and temperature resistance are poor. This shows that the flame retardant and other components of the present invention have a synergistic effect. Only when the components work together can the flame retardancy, UV resistance and temperature resistance be improved.

[0097] In summary, the present invention adopts styrene elastomer as the base resin, and matches it with polyolefin elastomer and metallocene linear low-density polyethylene. The components have good compatibility with each other, and are combined with flame retardants and specific types of anti-UV agents. The components work together to obtain a soft elastomeric material with excellent flame retardancy, UV resistance and temperature resistance, which can be used as a simulated leaf material.

[0098] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An elastomeric material, characterized in that: Including styrene elastomers, polyolefin elastomers, metallocene linear low-density polyethylene, flame retardants, additives; The auxiliary agent includes an anti-UV agent, and the anti-UV agent includes 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) succinate.

2. The elastomeric material according to claim 1, characterized in that The styrene elastomer includes at least one of a hydrogenated styrene-butadiene block copolymer and a hydrogenated ethylene thermoplastic elastomer; and / or the Shore hardness of the polyolefin elastomer is 80-90A; and / or the Shore hardness of the metallocene linear low-density polyethylene is 46-50D; and / or, in the anti-UV agent, the mass ratio of the 2-hydroxy-4-n-octyloxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol and poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol) ester is (2.5-3.5):(2.5-3.5):(2.5-3.5):

1.

3. The elastomeric material according to claim 1, characterized in that The flame retardant includes at least one of a phosphorus-based flame retardant, a nitrogen-based flame retardant, and a phosphorus-nitrogen-based flame retardant.

4. The elastomeric material according to claim 3, characterized in that The phosphorus-based flame retardant includes at least one of diethyl aluminum phosphite, dibutyl aluminum phosphite, diphenyl aluminum phosphite, aluminum hypophosphite, resorcinol bis(diphenyl phosphate), and bisphenol A-bis(diphenyl phosphate); and / or, the nitrogen-based flame retardant includes melamine cyanurate; and / or, the phosphorus-nitrogen-based flame retardant includes at least one of melamine pyrophosphate, melamine polyphosphate, ammonium polyphosphate, and piperazine pyrophosphate.

5. The elastomeric material according to claim 1, characterized in that Calculated by mass percentage, the elastomeric material comprises 18-33% of styrene elastomer, 18-27% of polyolefin elastomer, 4.5-11% of metallocene linear low-density polyethylene, 35-50% of flame retardant, and 1-5.5% of auxiliary agent.

6. The elastomeric material according to claim 1, characterized in that The auxiliary agent also includes at least one of a lubricant, an antioxidant, and a compatibilizer.

7. The elastomeric material according to claim 6, characterized in that The lubricant includes at least one of silicone masterbatch, fatty acid amide, erucic acid amide, ethylene bis stearic acid amide, pentaerythritol stearate, and polyethylene wax; and / or, the antioxidant includes at least one of hindered phenol antioxidants and phosphite antioxidants; and / or, the compatibilizer includes at least one of maleic anhydride grafted polyethylene, maleic anhydride grafted hydrogenated styrene-butadiene block copolymer, and maleic anhydride grafted polyolefin elastomer.

8. The method for preparing the elastomeric material according to any one of claims 1 to 7, characterized in that: The following steps are involved: The raw material components are mixed to obtain a mixture; the mixture is melt-extruded to obtain the elastomeric material.

9. The preparation method according to claim 8, characterized in that: The temperature of the melt extrusion is 110-190°C; and / or, a twin-screw extruder is used for the melt extrusion, and the aspect ratio of the twin-screw extruder is (36-56):1; the main engine speed of the twin-screw extruder is 220-350r / min.

10. A simulated leaf, characterized in that: The elastomeric material comprises any one of claims 1 to 7.

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