High-weather-resistance environment-friendly eva composite material and preparation method thereof

Abstract

The application relates to the technical field of EVA materials, and particularly discloses a high-weather-resistance environment-friendly EVA composite material and a preparation method thereof. The high-weather-resistance environment-friendly EVA composite material comprises the following components in mass fractions: 40-50 parts of EVA resin; 20-30 parts of LDPE resin; 5-10 parts of a thermal stabilizer; 5-10 parts of a plasticizer; and 3-4.5 parts of a composite oil. The composite oil is a compound of black seed oil, arborvitae fruit oil and eucommia seed oil. The application has the advantages of improving the weather resistance of the EVA composite material and maintaining high physical properties.

Description

Technical Field

[0001] The present invention relates to the field of EVA materials, and in particular to a highly weather-resistant and environmentally friendly EVA composite material and a preparation method thereof. Background Art

[0002] In recent years, with growing awareness of environmental protection and increasing demands for product quality, the development of new, high-performance, low-pollution materials has become a key topic in materials science. EVA, due to its excellent flexibility, impact resistance, and adhesion, has gained widespread application in many industrial sectors. However, traditional EVA materials are susceptible to aging after long-term exposure to natural conditions such as UV light, high temperatures, and humidity fluctuations, leading to performance degradation and limiting its further application in certain fields.

[0003] At present, the common methods to improve the weather resistance of EVA materials include adding UV absorbers, antioxidants, anti-aging agents and other additives. Although these additives can slow down the aging rate of EVA to a certain extent, if these additives are to significantly improve the weather resistance of EVA, they usually need to be added in large quantities. The large addition of UV absorbers, antioxidants, anti-aging agents and other additives will lead to a significant decrease in the physical properties of EVA materials. Therefore, there is still room for improvement. Summary of the Invention

[0004] In order to improve the weather resistance of EVA composite materials and maintain high physical properties, the present application provides a highly weather-resistant and environmentally friendly EVA composite material and a preparation method thereof.

[0005] In the first aspect, the present application provides a highly weather-resistant and environmentally friendly EVA composite material, which adopts the following technical solutions:

[0006] A highly weather-resistant and environmentally friendly EVA composite material, comprising the following components in parts by weight:

[0007] 40-50 parts of EVA resin;

[0008] 20-30 parts of LDPE resin;

[0009] 5-10 parts of heat stabilizer;

[0010] 5-10 parts of plasticizer;

[0011] 3-4.5 parts of compound oil;

[0012] The compound oil is a compound of black cumin seed oil, sacha inchi oil and eucommia ulmoides seed oil.

[0013] By adopting the above technical solution, a composite oil prepared by adding black cumin seed oil, sacha inchi oil, and eucommia seed oil to EVA resin can be effectively protected by the mutual cooperation of the black cumin seed oil, sacha inchi oil, and eucommia seed oil, thereby significantly improving the weather resistance of the composite material and enhancing the physical properties of the composite material, thereby expanding the application range of the composite material.

[0014] By compounding EVA resin and LDPE resin, the composite material has higher flexibility, higher tensile strength and elongation at break, further improving the application range of the composite material.

[0015] Thermal stabilizers can reduce thermal oxidative aging during composite material extrusion processing, reduce process difficulty, and improve product quality.

[0016] Plasticizers can improve the physical properties of composite materials, enhance the tensile strength of composite materials, and better meet various usage requirements.

[0017] Preferably, the mass ratio of the black cumin seed oil, sacha inchi oil, and eucommia seed oil is 1.5-2:0.5-1:1-1.5.

[0018] By adopting the above technical solution and specifically selecting the mass ratio of black cumin seed oil, sacha inchi oil and eucommia seed oil, the black cumin seed oil, sacha inchi oil and eucommia seed oil can be better coordinated with each other, thereby better improving the weather resistance of the composite material.

[0019] Preferably, the heat stabilizer is a compound of methyltin mercaptan, stearic acid and zinc laurate.

[0020] By adopting the above technical solution and specifically selecting methyltin mercaptan, stearic acid and zinc laurate, the effect of reducing the thermal oxidative aging phenomenon during the processing of the composite material is better.

[0021] Preferably, the mass ratio of the methyltin mercaptan, stearic acid, and zinc laurate is 1-2:3-5:1-3.

[0022] By adopting the above technical solution and specifically selecting the mass ratio of methyltin mercaptan, stearic acid and zinc laurate, the effect of resisting thermal oxidative aging is further improved, so that the performance of the composite material after high-temperature extrusion is better.

[0023] Preferably, the plasticizer is a compound of n-octanol, dioctyl adipate and dibutyl maleate.

[0024] By adopting the above technical solution and specifically selecting n-octanol, dioctyl adipate and dibutyl maleate, the physical properties of the composite material can be better improved.

[0025] Preferably, the mass ratio of n-octanol, dioctyl adipate and dibutyl maleate is 2-4:1-2:2-4.

[0026] By adopting the above technical solution and specifically selecting the mass ratio of n-octanol, dioctyl adipate and dibutyl maleate, the effect of improving the tensile strength of the composite material is better.

[0027] In a second aspect, the present application provides a method for preparing a highly weather-resistant and environmentally friendly EVA composite material, which adopts the following technical solution:

[0028] A method for preparing the above-mentioned highly weather-resistant and environmentally friendly EVA composite material comprises the following steps:

[0029] Step 1), EVA resin, LDPE resin, heat stabilizer, plasticizer, and compound oil are uniformly stirred to obtain a premix;

[0030] Step 2), extruding and granulating the premix to obtain a highly weather-resistant and environmentally friendly EVA composite material.

[0031] By adopting the above technical solution, the highly weather-resistant and environmentally friendly EVA composite material prepared has good weather resistance, excellent physical properties, a wide range of applications, and high economic value.

[0032] Preferably, in step 2), the extrusion temperature is 200-220°C.

[0033] By adopting the above technical solution and specifically selecting the extrusion temperature to be 200-220° C., the components are fully mixed, the modification effect on the composite material is better, and the weather resistance of the composite material is more significantly improved.

[0034] In summary, this application has the following beneficial effects:

[0035] 1. Since the composite oil prepared by adding black cumin seed oil, sacha inchi oil, and eucommia seed oil to EVA resin in the present application can effectively protect the EVA resin under the mutual cooperation of black cumin seed oil, sacha inchi oil, and eucommia seed oil, the weather resistance of the composite material is significantly improved, and the physical properties of the composite material are enhanced, so that the application range of the composite material is wider.

[0036] 2. In the present application, the mass ratio of black cumin seed oil, sacha inchi oil, and eucommia seed oil is preferably selected specifically so that the black cumin seed oil, sacha inchi oil, and eucommia seed oil cooperate with each other better, thereby better improving the weather resistance of the composite material.

[0037] 3. In this application, it is preferred to compound EVA resin and LDPE resin to make the composite material more flexible, and the composite material has higher tensile strength and elongation at break, further improving the application range of the composite material, and using a heat stabilizer to reduce the thermal oxidative aging phenomenon during the extrusion process of the composite material, reduce the process difficulty, and improve the product quality. The physical properties of the composite material are improved by using a plasticizer, and the tensile strength of the composite material is better improved to better meet various usage requirements. DETAILED DESCRIPTION

[0038] The present application is further described in detail below with reference to the embodiments.

[0039] Example 1

[0040] A highly weather-resistant and environmentally friendly EVA composite material, comprising the following components:

[0041] EVA resin, LDPE resin, heat stabilizer, plasticizer, compounding oil.

[0042] The heat stabilizer is a compound of methyltin mercaptan, stearic acid and zinc laurate.

[0043] The plasticizer is a compound of n-octanol, dioctyl adipate and dibutyl maleate.

[0044] The compound oil is a compound of black cumin seed oil, sacha inchi oil and eucommia ulmoides seed oil.

[0045] EVA resin was purchased from Mitsui Chemicals of Japan, brand 220.

[0046] LDPE resin was purchased from Sinopec, brand 1C7AS.

[0047] Methyltin mercaptan was purchased from Shandong Yueyang New Materials Co., Ltd., CAS No.: 451-65-34.

[0048] Stearic acid was purchased from Hubei Xinghengye Technology Co., Ltd., CAS No.: 57-11-4.

[0049] Zinc laurate was purchased from Wuhan Smack Biotechnology Co., Ltd., CAS number: 2452-01-9.

[0050] n-Octanol was purchased from Shandong Langcheng Chemical Co., Ltd., CAS No.: 111-87-5.

[0051] Dioctyl adipate was purchased from Shandong Yueyang New Materials Co., Ltd., CAS No.: 103-23-1.

[0052] Dibutyl maleate was purchased from Hubei Shineng Chemical Technology Co., Ltd., CAS No.: 105-76-0.

[0053] Black cumin seed oil was purchased from Jiangxi Xuesong Natural Medicinal Oil Co., Ltd.

[0054] Sacha Inchi oil was purchased from the Red Star Natural Medicinal Spice Oil Factory in Jishui County.

[0055] Eucommia seed oil was purchased from Xi'an Shilin Biotechnology Co., Ltd.

[0056] The preparation method of the highly weather-resistant and environmentally friendly EVA composite material comprises the following steps:

[0057] Step 1) 40 kg EVA resin, 20 kg LDPE resin, 1 kg methyl tin mercaptan, 3 kg stearic acid, 1 kg zinc laurate, 2 kg n-octanol, 1 kg dioctyl adipate, 2 kg dibutyl maleate, 1.5 kg black cumin seed oil, 0.5 kg sacha inchi oil, and 1 kg eucommia seed oil were put into a stirred tank at 240 r / min for 20 min and stirred evenly to obtain a premix.

[0058] Step 2) The premix is ​​put into a twin-screw extruder for extrusion and underwater granulation to obtain a highly weather-resistant and environmentally friendly EVA composite material. The processing temperatures of the twin-screw extruder zones I-XI are set to: 165°C, 165°C, 175°C, 185°C, 195°C, 195°C, 195°C, 200°C, 200°C, 200°C, and the screw speed is 40 r / min.

[0059] Example 2

[0060] A highly weather-resistant and environmentally friendly EVA composite material, comprising the following components:

[0061] EVA resin, LDPE resin, heat stabilizer, plasticizer, compounding oil.

[0062] The heat stabilizer is a compound of methyltin mercaptan, stearic acid and zinc laurate.

[0063] The plasticizer is a compound of n-octanol, dioctyl adipate and dibutyl maleate.

[0064] The compound oil is a compound of black cumin seed oil, sacha inchi oil and eucommia ulmoides seed oil.

[0065] EVA resin was purchased from Mitsui Chemicals of Japan, brand 220.

[0066] LDPE resin was purchased from Sinopec, brand 1C7AS.

[0067] Methyltin mercaptan was purchased from Shandong Yueyang New Materials Co., Ltd., CAS No.: 451-65-34.

[0068] Stearic acid was purchased from Hubei Xinghengye Technology Co., Ltd., CAS No.: 57-11-4.

[0069] Zinc laurate was purchased from Wuhan Smack Biotechnology Co., Ltd., CAS number: 2452-01-9.

[0070] n-Octanol was purchased from Shandong Langcheng Chemical Co., Ltd., CAS No.: 111-87-5.

[0071] Dioctyl adipate was purchased from Shandong Yueyang New Materials Co., Ltd., CAS No.: 103-23-1.

[0072] Dibutyl maleate was purchased from Hubei Shineng Chemical Technology Co., Ltd., CAS No.: 105-76-0.

[0073] Black cumin seed oil was purchased from Jiangxi Xuesong Natural Medicinal Oil Co., Ltd.

[0074] Sacha Inchi oil was purchased from the Red Star Natural Medicinal Spice Oil Factory in Jishui County.

[0075] Eucommia seed oil was purchased from Xi'an Shilin Biotechnology Co., Ltd.

[0076] The preparation method of the highly weather-resistant and environmentally friendly EVA composite material comprises the following steps:

[0077] Step 1), 45kg EVA resin, 25kg LDPE resin, 1.5kg methyl tin mercaptan, 4kg stearic acid, 2kg zinc laurate, 3kg n-octanol, 1.5kg dioctyl adipate, 3kg dibutyl maleate, 1.8kg black cumin seed oil, 0.7kg sacha inchi oil, and 1.2kg eucommia seed oil are put into a stirred tank at 240r / min for 20min and stirred evenly to obtain a premix.

[0078] Step 2) The premix is ​​put into a twin-screw extruder and extruded, and underwater granulation is performed to obtain a highly weather-resistant and environmentally friendly EVA composite material. The processing temperatures of the twin-screw extruder zones I-XI are set to: 175°C, 175°C, 185°C, 195°C, 205°C, 205°C, 205°C, 210°C, 210°C, and the screw speed is 40 r / min.

[0079] Example 3

[0080] A highly weather-resistant and environmentally friendly EVA composite material, comprising the following components:

[0081] EVA resin, LDPE resin, heat stabilizer, plasticizer, compounding oil.

[0082] The heat stabilizer is a compound of methyltin mercaptan, stearic acid and zinc laurate.

[0083] The plasticizer is a compound of n-octanol, dioctyl adipate and dibutyl maleate.

[0084] The compound oil is a compound of black cumin seed oil, sacha inchi oil and eucommia ulmoides seed oil.

[0085] EVA resin was purchased from Mitsui Chemicals of Japan, brand 220.

[0086] LDPE resin was purchased from Sinopec, brand 1C7AS.

[0087] Methyltin mercaptan was purchased from Shandong Yueyang New Materials Co., Ltd., CAS No.: 451-65-34.

[0088] Stearic acid was purchased from Hubei Xinghengye Technology Co., Ltd., CAS No.: 57-11-4.

[0089] Zinc laurate was purchased from Wuhan Smack Biotechnology Co., Ltd., CAS number: 2452-01-9.

[0090] n-Octanol was purchased from Shandong Langcheng Chemical Co., Ltd., CAS No.: 111-87-5.

[0091] Dioctyl adipate was purchased from Shandong Yueyang New Materials Co., Ltd., CAS No.: 103-23-1.

[0092] Dibutyl maleate was purchased from Hubei Shineng Chemical Technology Co., Ltd., CAS No.: 105-76-0.

[0093] Black cumin seed oil was purchased from Jiangxi Xuesong Natural Medicinal Oil Co., Ltd.

[0094] Sacha Inchi oil was purchased from the Red Star Natural Medicinal Spice Oil Factory in Jishui County.

[0095] Eucommia seed oil was purchased from Xi'an Shilin Biotechnology Co., Ltd.

[0096] The preparation method of the highly weather-resistant and environmentally friendly EVA composite material comprises the following steps:

[0097] Step 1), 50kg EVA resin, 30kg LDPE resin, 2kg methyl tin mercaptan, 5kg stearic acid, 3kg zinc laurate, 4kg n-octanol, 2kg dioctyl adipate, 4kg dibutyl maleate, 2kg black cumin seed oil, 1kg Sacha inchi oil, 1.5kg eucommia seed oil were put into a stirred tank, 240r / min, stirred for 20min, and stirred evenly to obtain a premix.

[0098] Step 2) The premix is ​​put into a twin-screw extruder and extruded, and underwater granulation is performed to obtain a highly weather-resistant and environmentally friendly EVA composite material. The processing temperatures of the twin-screw extruder zones I-XI are set to: 185°C, 185°C, 195°C, 205°C, 215°C, 215°C, 215°C, 220°C, 220°C, 220°C, and the screw speed is 40 r / min.

[0099] Comparative Example 1

[0100] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0101] Replace black cumin oil with an equal amount of flaxseed oil.

[0102] Flaxseed oil was purchased from Jiangxi Xuesong Natural Medicinal Oil Co., Ltd.

[0103] Comparative Example 2

[0104] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0105] Replace sacha inchi oil with an equal amount of neem seed oil.

[0106] Neem seed oil was purchased from Hubei Yuanmeng Biotechnology Co., Ltd.

[0107] Comparative Example 3

[0108] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0109] Use apple seed oil to replace eucommia seed oil in equal amounts.

[0110] Apple seed oil Jiangxi Yuanshangcao Spice Co., Ltd.

[0111] Comparative Example 4

[0112] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0113] Use flaxseed oil to replace black cumin seed oil, use neem seed oil to replace sacha inchi oil, and use apple seed oil to replace eucommia seed oil.

[0114] Flaxseed oil was purchased from Jiangxi Xuesong Natural Medicinal Oil Co., Ltd.

[0115] Neem seed oil was purchased from Hubei Yuanmeng Biotechnology Co., Ltd.

[0116] Apple seed oil Jiangxi Yuanshangcao Spice Co., Ltd.

[0117] Comparative Example 5

[0118] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0119] An equal amount of antioxidant 2246 was used to replace black cumin seed oil.

[0120] Antioxidant 2246 was purchased from Nanjing Milan Chemical Co., Ltd.

[0121] Comparative Example 6

[0122] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0123] An equal amount of antioxidant 1076 was used to replace sacha inchi oil.

[0124] Antioxidant 1076 was purchased from Dongguan Zhenming Chemical Co., Ltd.

[0125] Comparative Example 7

[0126] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0127] An equal amount of antioxidant 1010 was used to replace eucommia seed oil.

[0128] Antioxidant 1010 was purchased from Jinan Junteng Chemical Co., Ltd.

[0129] Comparative Example 8

[0130] A highly weather-resistant and environmentally friendly EVA composite material, compared with Example 2, differs only in that:

[0131] An equal amount of antioxidant 2246 was used to replace black cumin seed oil, an equal amount of antioxidant 1076 was used to replace sacha inchi oil, and an equal amount of antioxidant 1010 was used to replace eucommia seed oil.

[0132] Antioxidant 2246 was purchased from Nanjing Milan Chemical Co., Ltd.

[0133] Antioxidant 1076 was purchased from Dongguan Zhenming Chemical Co., Ltd.

[0134] Antioxidant 1010 was purchased from Jinan Junteng Chemical Co., Ltd.

[0135] Experiment 1

[0136] According to GB / T13642-2015 "Dynamic Tensile Test for Ozone Cracking Resistance of Vulcanized Rubber or Thermoplastic Rubber", the ozone aging resistance of the samples prepared from the highly weather-resistant and environmentally friendly EVA composite materials of each embodiment and comparative example was tested (ozone concentration 800 pphm, elongation 20%, 40°C), and the time required for cracking to occur was tested.

[0137] Experiment 2

[0138] According to GB / T1040.2-2022 "Determination of tensile properties of plastics Part 2: Test conditions for molded and extruded plastics", the tensile strength of the samples made of high weather-resistant and environmentally friendly EVA composite materials in each embodiment and comparative example was tested, and type 1A samples were used for testing.

[0139] The specific test data of Experiments 1 and 2 are shown in Table 1.

[0140] Table 1

[0141] Ozone cracking time (h) Tensile strength (MPa) Example 1 42 23.4 Example 2 43 23.7 Example 3 45 24.1 Comparative Example 1 29 22.8 Comparative Example 2 31 22.6 Comparative Example 3 27 23.1 Comparative Example 4 26 22.5 Comparative Example 5 40 14.3 Comparative Example 6 38 15.7 Comparative Example 7 41 14.6 Comparative Example 8 43 14.1

[0142] According to the data comparison of each embodiment and comparative example in Table 1, the weather resistance of each embodiment is significantly better than that of comparative examples 1-4, and the physical performance is slightly better than that of comparative examples 1-4. It can be seen that only the composite oil formed by adding black cumin seed oil, sacha inchi oil, and eucommia seed oil can significantly improve the weather resistance. Although the use of other oils also helps to maintain the physical properties of the EVA composite material, the effect of improving the weather resistance is relatively general.

[0143] The weather resistance of each embodiment is slightly better than that of comparative examples 5-8. At the same time, the tensile strength of each embodiment is significantly better than that of comparative examples 5-8. It can be seen that the addition of the composite oil formed by compounding black cumin seed oil, sacha inchi oil, and eucommia seed oil to the EVA composite material can make the weather resistance of the EVA composite material reach the level when a large amount of antioxidant is added. At the same time, only adding black cumin seed oil, sacha inchi oil, and eucommia seed oil without adding antioxidant can keep the tensile strength of the EVA composite material at a high level, and will not cause a significant decrease in the tensile strength of the EVA resin as in comparative examples 5-8.

[0144] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A highly weather-resistant and environmentally friendly EVA composite material, characterized by: The composition includes the following parts by weight: 40-50 parts of EVA resin; 20-30 parts of LDPE resin; 5-10 parts of heat stabilizer; 5-10 parts of plasticizer; 3-4.5 parts of compound oil; The compound oil is a combination of black cumin seed oil, sacha inchi oil, and eucommia seed oil; The mass ratio of the black cumin seed oil, sacha inchi oil and eucommia ulmoides seed oil is 1.5-2:0.5-1:1-1.

5.

2. The highly weather-resistant and environmentally friendly EVA composite material according to claim 1, characterized in that: The heat stabilizer is a compound of methyltin mercaptan, stearic acid and zinc laurate.

3. The highly weather-resistant and environmentally friendly EVA composite material according to claim 2, characterized in that: The mass ratio of the methyltin mercaptan, stearic acid and zinc laurate is 1-2:3-5:1-3.

4. The highly weather-resistant and environmentally friendly EVA composite material according to claim 1, characterized in that: The plasticizer is a compound of n-octanol, dioctyl adipate and dibutyl maleate.

5. The highly weather-resistant and environmentally friendly EVA composite material according to claim 4, characterized in that: The mass ratio of n-octanol, dioctyl adipate and dibutyl maleate is 2-4:1-2:2-4.

6. A method for preparing the highly weather-resistant and environmentally friendly EVA composite material according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1) EVA resin, LDPE resin, heat stabilizer, plasticizer and compound oil are uniformly stirred to obtain a premix; Step 2) extruding and granulating the premix to obtain a highly weather-resistant and environmentally friendly EVA composite material.

7. The method for preparing a highly weather-resistant and environmentally friendly EVA composite material according to claim 6, characterized in that: In the step 2), the extrusion temperature is 200-220°C.