A kind of wear-resistant and oil-resistant TPU and preparation method thereof

Abstract

The present application relates to the field of thermoplastic elastomer materials, and discloses a wear-resistant and oil-resistant TPU. A wear-resistant and oil-resistant TPU is prepared from the following raw materials in parts by weight: 50-70 parts of thermoplastic polyurethane elastomer, 10-20 parts of terminal hydroxyl liquid nitrile rubber, 35-45 parts of modified white carbon black, 5-10 parts of plasticizer, 3-6 parts of vulcanizer and 2-4 parts of antioxidant; modified white carbon black is composed of white carbon black, triallyl isocyanurate and silane coupling agent. Preparation method: Thermoplastic polyurethane elastomer, modified white carbon black, wear-resistant additive, plasticizer and antioxidant are melt-blended, calendered, cooled and cut to obtain wear-resistant and oil-resistant TPU. The TPU prepared in this application has good temperature resistance, wear resistance and oil resistance, and is used in the sealing material of hydraulic press, and has good aging resistance and fatigue resistance.

Description

Technical Field

[0001] The present application relates to the field of thermoplastic elastomer materials, and more specifically, to wear-resistant and oil-resistant TPU and a preparation method thereof. Background Art

[0002] A hydraulic press is a mechanical device that uses special hydraulic oil as the working medium and a hydraulic pump as the power source. The hydraulic oil enters the cylinder / piston through the hydraulic pipeline by the force of the hydraulic pump. Then there are several sets of seals that cooperate with each other in the cylinder / piston. Under certain temperature, pressure and different liquids and gases, it can play a sealing role in a static or moving state to prevent liquid or gas leakage. Finally, the hydraulic oil circulates in the oil tank through a one-way valve to make the cylinder / piston circulate and do work, thereby completing a certain mechanical action as a power source.

[0003] As the core parts of the hydraulic press, the sealant material needs to have good strength, wear resistance, oil resistance, aging resistance and fatigue resistance. At present, nitrile rubber or EPDM rubber is usually used as the main material of the seal. Although nitrile rubber has good oil resistance, heat resistance, cold resistance, pressure resistance and water resistance, when the hydraulic press is running for a long time, the seal is subjected to high pressure and high temperature environment for a long time, which reduces the wear resistance of nitrile rubber and further reduces the sealing performance of the seal; EPDM rubber has good tensile strength, tear strength and wear resistance, but when the hydraulic press is running for a long time, it is easy to absorb oil and cause the seal to age, reducing the sealing performance of the seal. Summary of the invention

[0004] In order to solve the problem that the sealing materials of existing hydraulic presses cannot take into account both wear resistance and oil resistance, thereby reducing the sealing performance of the sealing materials, the present application provides a wear-resistant and oil-resistant TPU and a preparation method thereof.

[0005] In the first aspect, the present application provides a wear-resistant and oil-resistant TPU, which adopts the following technical solution:

[0006] A wear-resistant and oil-resistant TPU is prepared from the following raw materials in parts by weight:

[0007] Thermoplastic polyurethane elastomer 50-70 parts

[0008] Modified white carbon black 35-45 parts

[0009] Wear-resistant additive 10-20 parts

[0010] Plasticizer 5-10 parts

[0011] 2-4 parts of antioxidants;

[0012] The modified white carbon black consists of white carbon black, triallyl isocyanurate and a silane coupling agent.

[0013] By adopting the above technical scheme, the wear-resistant and oil-resistant TPU of the present application uses thermoplastic polyurethane elastomer as the base material. Compared with nitrile rubber and EPDM rubber, thermoplastic polyurethane elastomer has relatively good wear resistance and oil resistance. However, thermoplastic polyurethane elastomer has low fatigue resistance under long-term high pressure and high temperature conditions, which reduces the wear resistance of the obtained wear-resistant and oil-resistant TPU. Therefore, the present application adds modified silica and wear-resistant additives to the thermoplastic elastomer. The modified silica is composed of silica, triallyl isocyanurate and silane coupling agent. Triallyl isocyanurate and silane coupling agent can form a network system that interweaves and interweaves with each other, so that The white carbon black is dispersed evenly and stably, which can improve the compatibility of white carbon black with thermoplastic polyurethane elastomer and wear-resistant additives. The wear-resistant additives and modified white carbon black play a good synergistic role and can be evenly dispersed in the thermoplastic polyurethane elastomer to further form a network structure with interwoven molecular structures, improve the density of the network structure, and further improve the temperature resistance, wear resistance and oil resistance of the wear-resistant and oil-resistant TPU obtained; the plasticizer can improve the fluidity and processing stability of the system, further improve the comprehensive performance of the wear-resistant and oil-resistant TPU obtained, and the antioxidant has a good antioxidant effect, which can further improve the aging resistance of the wear-resistant and oil-resistant TPU.

[0014] The wear-resistant and oil-resistant TPU prepared in the present application has good temperature resistance, wear resistance and oil resistance, is used in the sealing material of the hydraulic press, has good aging resistance and fatigue resistance, and is not easily damaged when used for a long time under high reciprocating pressure conditions and high temperature conditions.

[0015] Preferably, the modified silica is prepared from the following raw materials in parts by weight:

[0016] 80-100 parts of white carbon black

[0017] Triallyl isocyanurate 6-12 parts

[0018] Silane coupling agent 5-10 parts.

[0019] By adopting the above technical scheme, triallyl isocyanurate and silane coupling agent with a better dosage ratio are compounded with white carbon black, which can form a network structure in which molecular chain segments are interlaced and interwoven with each other, so that the white carbon black is evenly dispersed, the spacing between white carbon black molecules is increased, and the problem of easy agglomeration of white carbon black is reduced. The interlaced and interwoven network structure improves the compatibility of white carbon black with thermoplastic polyurethane elastomer, thereby improving the structural density and uniformity of the wear-resistant and oil-resistant TPU obtained, thereby improving the temperature resistance, wear resistance and oil resistance of the wear-resistant and oil-resistant TPU.

[0020] Preferably, the silane coupling agent is composed of a long-chain alkyl silane coupling agent and 3-isocyanate propyltrimethoxysilane in a weight ratio of 1:(1-3).

[0021] By adopting the above technical scheme, the long-chain alkyl silane coupling agent refers to a silane coupling agent containing 8-18 straight-chain alkyl groups, such as n-octyltrimethoxysilane, dodecyltrimethoxysilane, hexadecyltrimethoxysilane and octadecyltrimethoxysilane, etc. The long-chain alkyl silane coupling agent and 3-isocyanatepropyltrimethoxysilane can produce a good synergistic effect, further stably combine with white carbon black, improve the dispersibility of white carbon black, and at the same time, can be interwoven with triallyl isocyanurate to form an interpenetrating network structure. The interpenetrating molecular structure improves the wear resistance and oil resistance of the wear-resistant and oil-resistant TPU, overcomes the disadvantage that the addition of white carbon black reduces the elasticity of the wear-resistant and oil-resistant TPU, and thus improves the temperature resistance, wear resistance and oil resistance of the wear-resistant and oil-resistant TPU.

[0022] Preferably, the preparation steps of the modified silica are as follows:

[0023] The silane coupling agent is added to the white carbon black, and after kneading evenly, triallyl isocyanurate is added and kneaded evenly to prepare the modified white carbon black.

[0024] By adopting the above technical scheme, the silane coupling agent and white carbon black are first kneaded so that the silane coupling agent is evenly bonded to the surface of the white carbon black, the surface energy of the white carbon black is reduced, and the dispersibility of the white carbon black is improved. Then, triallyl isocyanurate is added and kneaded so that the triallyl isocyanurate and the silane coupling agent evenly dispersed on the surface of the white carbon black are evenly interlaced and interwoven, thereby improving the uniformity and stability of the modified white carbon black obtained.

[0025] Preferably, the first kneading temperature is 60-80°C, and the kneading time is 30-40 min; the second kneading temperature is 100-120°C, and the kneading time is 20-30 min.

[0026] By adopting the above technical scheme, white carbon black and silane coupling agent are combined under optimal temperature conditions, and then the kneading temperature is increased, so that triallyl isocyanurate and silane coupling agent are further interlaced and interwoven, and by adjusting the kneading temperature twice, the modification efficiency of white carbon black is improved, thereby improving the performance of the modified white carbon black obtained.

[0027] Preferably, the wear-resistant additive is composed of 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer in a weight ratio of 1:(1-3).

[0028] By adopting the above technical scheme, 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer with a better dosage ratio are used as wear-resistant additives, which can further play a good synergistic role with modified silica and thermoplastic polyurethane elastomer, further improve the molecular structure density of the wear-resistant and oil-resistant TPU obtained, and then improve the temperature resistance, wear resistance and oil resistance of the wear-resistant and oil-resistant TPU obtained.

[0029] Preferably, the plasticizer is any one or a combination of dibutyl phthalate, dioctyl phthalate, tributyl triol phosphate, and epoxidized polypropylene.

[0030] By adopting the above technical solution, the above plasticizer can better improve the interaction between the thermoplastic polyurethane elastomer and other raw material molecules, reduce the melting temperature and melt viscosity, improve its molding and processing performance, and further enhance the stability of the obtained wear-resistant and oil-resistant TPU.

[0031] Preferably, the antioxidant is any one or a combination of antioxidant 1076, antioxidant 264, antioxidant 1010, and antioxidant 4010.

[0032] By adopting the above technical solution, the above antioxidant has good antioxidant properties and can improve the aging resistance of the prepared wear-resistant and oil-resistant TPU.

[0033] In the second aspect, the present application provides a method for preparing wear-resistant and oil-resistant TPU, adopting the following technical scheme: a method for preparing wear-resistant and oil-resistant TPU, comprising the following preparation steps: melt blending a thermoplastic polyurethane elastomer, modified silica, a wear-resistant additive, a plasticizer and an antioxidant, calendering, cooling, and cutting to obtain a wear-resistant and oil-resistant TPU.

[0034] By adopting the above technical scheme and using the preparation process of melt blending and calendering molding, wear-resistant, abrasion-resistant and oil-resistant TPU is prepared. The preparation method is simple and easy to operate and is suitable for industrial continuous production.

[0035] Preferably, the melting temperature is 200-220°C.

[0036] By adopting the above technical solution, the better melting temperature can make the above raw materials evenly mixed and melted, thereby improving the processing stability.

[0037] In summary, this application has the following beneficial effects:

[0038] 1. In the present application, modified silica prepared from silica, triallyl isocyanurate and a silane coupling agent is compounded with a thermoplastic polyurethane elastomer, a wear-resistant additive, a plasticizer and an antioxidant. The thermoplastic polyurethane elastomer, the modified silica and the wear-resistant additive play a good synergistic role, forming a network structure in which the molecular structures are interlaced and interwoven with each other, thereby improving the molecular structure density of the wear-resistant and oil-resistant TPU prepared. The wear-resistant and oil-resistant TPU prepared has good temperature resistance, wear resistance and oil resistance, is used in the sealing material of the hydraulic press, has good aging resistance and fatigue resistance, and is not easy to be damaged.

[0039] 2. The present application uses 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer in an optimal dosage ratio as wear-resistant additives, which can further improve the density of the branch structure of the wear-resistant and oil-resistant TPU obtained, and further improve the temperature resistance, wear resistance and oil resistance of the wear-resistant and oil-resistant TPU obtained.

[0040] 3. The present application adopts a preparation method of melt blending and calendering, which is simple and easy to operate and suitable for industrial continuous production. DETAILED DESCRIPTION

[0041] The present application is further described in detail below with reference to examples.

[0042] The following are the sources and specifications of some raw materials of this application. The raw materials used in the preparation examples and embodiments of this application can be obtained from the market, including but not limited to the raw materials of the following models and manufacturers. Raw materials with equivalent performance can be used:

[0043] 1. Thermoplastic polyurethane elastomer: Huntsman, Germany, A92K4107;

[0044] 2. Silica: Cabot, fumed silica N330

[0045] 3. Triallyl isocyanurate: CAS No. 1025-15-6, content 99%;

[0046] 4. 3-isocyanatepropyltrimethoxysilane: CAS No. 15396-00-6, content 98%;

[0047] 5. 4-vinylbenzyl glycidyl ether: CAS No. 113538-80-0, content 99%;

[0048] 6. Polyamide thermoplastic elastomer: Arkema PA12;

[0049] Preparation example of modified silica

[0050] Preparation Example 1

[0051] Preparation Example 1 discloses a modified silica, which is prepared by the following steps: adding 0.8 kg of silane coupling agent (composed of n-octyltrimethoxysilane and vinyltrimethoxysilane in a weight ratio of 1:1) to 8 kg of silica, kneading at a temperature of 60°C for 30 minutes, kneading evenly, adding 0.6 kg of triallyl isocyanurate, kneading at a temperature of 100°C for 20 minutes, kneading evenly, to obtain modified silica.

[0052] Preparation Example 2-3

[0053] The difference between Preparation Example 2-3 and Preparation Example 1 is that the amount of raw materials used and the preparation conditions are different, see Table 1 below for details.

[0054] Table 1 Raw material dosage and preparation conditions of Preparation Examples 1-3

[0055]

[0056] Preparation Example 4

[0057] The difference between Preparation Example 4 and Preparation Example 1 is that the silane coupling agent is different. The silane coupling agent in Preparation Example 4 is composed of dodecyltrimethoxysilane and 3-isocyanatepropyltrimethoxysilane. The amount of dodecyltrimethoxysilane is 0.2 kg, and the amount of 3-isocyanatepropyltrimethoxysilane is 0.6 kg. The others are the same as Preparation Example 1.

[0058] Preparation Example 5

[0059] The difference between Preparation Example 5 and Preparation Example 1 is that the silane coupling agent in Preparation Example 5 is composed of dodecyltrimethoxysilane and 3-isocyanatepropyltrimethoxysilane, the amount of dodecyltrimethoxysilane used is 0.4 kg, the amount of 3-isocyanatepropyltrimethoxysilane used is 0.4 kg, and the others are the same as Preparation Example 1.

[0060] Preparation Comparative Example 1

[0061] The difference between Preparation Comparative Example 1 and Preparation Example 1 is that an equal amount of triallyl isocyanurate is replaced by hexamethylene diisocyanate, and the rest is the same as Preparation Example 1.

[0062] Preparation Comparative Example 2

[0063] The difference between Preparation Example 2 and Preparation Example 1 is that the triallyl isocyanurate is replaced by an equal amount of a silane coupling agent (composed of n-octyltrimethoxysilane and vinyltrimethoxysilane in a weight ratio of 1:1), and the rest is the same as Preparation Example 1.

[0064] Example

[0065] Example 1

[0066] Example 1 discloses a wear-resistant and oil-resistant TPU, which is prepared by the following steps: 5kg of thermoplastic polyurethane elastomer, 3.5kg of modified white carbon black prepared in Preparation Example 1, 1kg of wear-resistant additive (composed of thermoplastic elastomer SEBS and 3-glycidyloxypropyltrimethoxysilane in a weight ratio of 0.5:1), 0.5kg of dibutyl phthalate as a plasticizer and 0.2kg of antioxidant (composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1) are melt-blended, the melting temperature is controlled to 200°C, and the mixture is mixed for 1h at a mixing rate of 800r / min, and then calendered, cooled, and cut to obtain the wear-resistant and oil-resistant TPU; the thermoplastic elastomer SEBS is Baling Petrochemical YH-533.

[0067] Example 2-3

[0068] The difference between Example 2-3 and Example 1 is that the amount of raw materials used and the preparation conditions are different, see Table 2 below for details.

[0069] Table 2 Raw material dosage and preparation conditions of Examples 1-3

[0070]

[0071]

[0072] Example 4

[0073] The difference between Example 4 and Example 1 is that the modified silica comes from Preparation Example 4, and the rest is the same as Example 1.

[0074] Example 5

[0075] The difference between Example 5 and Example 1 is that the modified silica comes from Preparation Example 5, and the rest is the same as Example 1.

[0076] Example 6

[0077] The difference between Example 6 and Example 4 is that the wear-resistant additive is different. The wear-resistant additive in Example 6 is composed of 4-vinylbenzyl glycidyl ether and thermoplastic elastomer SEBS, the amount of 4-vinylbenzyl glycidyl ether is 0.5kg, the amount of thermoplastic elastomer SEBS is 0.5kg, and the rest is the same as Example 4.

[0078] Example 7

[0079] The difference between Example 7 and Example 4 is that the wear-resistant additive in Example 7 is composed of 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer, the amount of 4-vinylbenzyl glycidyl ether is 0.5 kg, the amount of polyamide thermoplastic elastomer is 0.5 kg, and the rest is the same as Example 4.

[0080] Example 8

[0081] The difference between Example 8 and Example 4 is that the wear-resistant additive in Example 8 is composed of 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer, the amount of 4-vinylbenzyl glycidyl ether is 0.25 kg, the amount of polyamide thermoplastic elastomer is 0.75 kg, and the rest is the same as Example 4.

[0082] Comparative Example

[0083] Comparative Example 1

[0084] The difference between Comparative Example 1 and Example 1 is that the modified silica is derived from the preparation of Comparative Example 1, and the rest is the same as Example 1.

[0085] Comparative Example 2

[0086] The difference between Comparative Example 2 and Example 1 is that the modified silica is derived from the preparation of Comparative Example 2, and the rest is the same as Example 1.

[0087] Comparative Example 3

[0088] The difference between Comparative Example 3 and Example 1 is that the modified silica is replaced by silica in an equal amount, and the rest is the same as Example 1.

[0089] Comparative Example 4

[0090] The difference between Comparative Example 4 and Example 1 is that the wear-resistant additive is replaced by white carbon black in equal amount, and the rest is the same as Example 1.

[0091] Performance Testing The wear-resistant and oil-resistant TPUs prepared in Examples 1-8 and Comparative Examples 1-4 were tested for performance:

[0092] 1. Wear resistance test:

[0093] According to GB / T5478-2008 Test Method for Rolling Wear of Plastics, a circular specimen with a diameter of 100 mm and a thickness of 5 mm was cut, with a load of 1 kg, a running length of 25.4 mm, and a running speed of 45 r / min. The friction wheel was CS17, and the wear amount (unit: g) after 5000 times of testing was calculated. The first wear rate (unit: %) was calculated, the first wear rate = wear amount / initial weight of the specimen * 100%, retaining two decimal places, and the test results were tested and recorded.

[0094] 2. Oil resistance test:

[0095] Place a circular specimen with a diameter of 100 mm and a thickness of 5 mm in hydraulic oil, which is Great Wall L-HM46, and place it in a constant temperature and humidity chamber at a temperature of 85°C and a humidity of 70% for 7 days. After taking it out, clean the hydraulic oil. Refer to "GB / T5478-2008 Plastic Rolling Wear Test Method", load 1kg, and run at a speed of 45r / min; CS17 is used as the friction wheel, and the wear amount (unit: g) after 5000 times of testing is tested. Calculate the second wear rate (unit: %) according to the above, keep two decimal places, test and record the test results;

[0096] 3. Temperature resistance test:

[0097] Place a circular specimen with a diameter of 100mm and a thickness of 5mm in a constant temperature and humidity chamber at a temperature of 100℃ and a humidity of 70% for 7 days, refer to "GB / T5478-2008 Plastic Rolling Wear Test Method", load 1kg, run at a speed of 45r / min; use CS17 friction wheel, test the wear amount (unit: g) after 5000 times, refer to the above calculation of the third wear rate (unit: %), retain two decimal places, test and record the test results;

[0098] The following are the performance test data of the wear-resistant and oil-resistant TPU of Examples 1-8 and Comparative Examples 1-4, see Table 3 below for details.

[0099] Table 3 Performance test data of wear-resistant and oil-resistant TPU of Examples 1-8 and Comparative Examples 1-4

[0100]

[0101]

[0102] Combining Example 1 and Comparative Examples 1-3 and Table 3, it can be seen that the modified white carbon black prepared by compounding the white carbon black, triallyl isocyanurate and silane coupling agent of the present application can significantly improve the wear resistance, temperature resistance and oil resistance of the wear-resistant and oil-resistant TPU prepared. The wear rate of the wear-resistant and oil-resistant TPU in Example 1 is increased by 0.81% after the oil resistance test, while in Comparative Examples 1 and Comparative Examples 2, triallyl isocyanurate and silane coupling agent are not used for compounding, and the wear rates are increased by 3.34% and 3.84%, respectively; Example The wear rate of the wear-resistant and oil-resistant TPU in Example 1 increased by 0.56% after the temperature resistance test, while that of Comparative Example 1 and Comparative Example 2 increased by 2.03% and 2.43% respectively. In Comparative Example 3, commercially available white carbon black was used, and the wear-resistant and oil-resistant TPU obtained increased by 4.8% and 3.37% after the oil resistance and temperature resistance tests respectively. It can be explained that the modified white carbon black prepared by compounding triallyl isocyanurate and silane coupling agent in the preferred dosage ratio of the present application has significantly improved the temperature resistance and oil resistance of the wear-resistant and oil-resistant TPU, and significantly reduced the wear rate.

[0103] Combining Examples 1-3 and Examples 4-5 and Table 3, it can be seen that further compounding with a long-chain alkyl silane coupling agent and 3-isocyanate propyltrimethoxysilane in a preferred dosage ratio can improve the performance of the wear-resistant and oil-resistant TPU obtained. Compared with Example 1, the wear rate of the wear-resistant and oil-resistant TPU in Example 4-5 after the oil resistance test is increased by 0.5%, which is 0.31% lower than that in Example 1; the wear rate of the wear-resistant and oil-resistant TPU in Example 4-5 after the temperature resistance test is increased by 0.35%, which is 0.21% lower than that in Example 1.

[0104] Combining Example 4 and Examples 6-8 and Table 3, it can be concluded that the use of 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer in the preferred dosage ratio of the present application as wear-resistant additives can further improve the wear resistance of the wear-resistant and oil-resistant TPU obtained. After the oil resistance test, the wear rate of the wear-resistant and oil-resistant TPU in Example 8 was only increased by 0.15%, and after the temperature resistance test, the wear rate was only increased by 0.1%. Compared with Example 4, the wear rate is significantly reduced.

[0105] Further, in combination with Example 1 and Comparative Example 4 and Table 3, it can be concluded that the compounding of the wear-resistant additive and the modified silica in an optimal dosage ratio can produce a better synergistic effect and improve the wear resistance of the wear-resistant and oil-resistant TPU obtained; in Comparative Example 4, the wear-resistant additive is replaced with modified silica in an equal amount, and the wear resistance of the wear-resistant and oil-resistant TPU obtained is reduced, and the temperature resistance and oil resistance are also reduced.

[0106] 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 modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A wear-resistant and oil-resistant TPU, characterized in that: Made from the following raw materials in parts by weight: Thermoplastic polyurethane elastomer 50-70 parts Modified white carbon black 35-45 parts Wear-resistant additive 10-20 parts Plasticizer 5-10 parts 2-4 parts of antioxidants; The modified white carbon black is prepared from the following raw materials in parts by weight: 80-100 parts of white carbon black Triallyl isocyanurate 6-12 parts Silane coupling agent 5-10 parts; The silane coupling agent is composed of a long-chain alkyl silane coupling agent and 3-isocyanate propyltrimethoxysilane in a weight ratio of 1:(1-3); the preparation steps of the modified white carbon black are as follows: Adding a silane coupling agent to white carbon black, kneading the mixture evenly, and then adding triallyl isocyanurate and kneading the mixture evenly to obtain modified white carbon black; The wear-resistant additive consists of 4-vinylbenzyl glycidyl ether and polyamide thermoplastic elastomer in a weight ratio of 1:(1-3).

2. The wear-resistant and oil-resistant TPU according to claim 1, characterized in that: The first kneading temperature is 60-80°C, and the kneading time is 30-40min; the second kneading temperature is 100-120°C, and the kneading time is 20-30min.

3. The wear-resistant and oil-resistant TPU according to claim 1, characterized in that: The plasticizer is dibutyl phthalate.

4. The wear-resistant and oil-resistant TPU according to claim 1, characterized in that: The antioxidant is any one or a combination of antioxidant 1076, antioxidant 264, antioxidant 1010, and antioxidant 4010.

5. A method for preparing a wear-resistant and oil-resistant TPU as claimed in any one of claims 1 to 4, characterized in that: The method comprises the following preparation steps: Thermoplastic polyurethane elastomer, modified white carbon black, wear-resistant additive, plasticizer and antioxidant are melt-blended, calendered, cooled and cut to obtain wear-resistant and oil-resistant TPU.

6. The method for preparing a wear-resistant and oil-resistant TPU according to claim 5, characterized in that: The melting temperature is 200-220°C.

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