High-road-holding-force sun and rain dual-purpose electric motorcycle cover tyre and preparation method thereof

Abstract

The invention belongs to the technical field of tires, and particularly relates to a high-road-holding-force sun and rain dual-purpose electric motorcycle cover tire and a preparation method thereof. A rubber material used by the outer tire is prepared from the following components in parts by mass: 110 to 120 parts of oil-extended butadiene-styrene rubber, 55 to 80 parts of carbon black, 15 to 30 parts of N32 engine oil, 3 to 5 parts of zinc oxide, 2 to 2.5 parts of stearic acid, 2 to 5 parts of tackifying resin, 5 to 7 parts of C9 resin, 1.5 to 2.0 parts of an anti-aging agent RD, 1.0 to 2.0 parts of protective wax, 1.5 to 1.8 parts of sulfur, 2.7 to 3.4 parts of an accelerant, 26 to 30 parts of bio-based itaconate rubber and 19 to 24 parts of a rubber material with a model of EVEC 236. And 12 to 16 parts of a sizing material with a model of EVEC409. The rubber material used for the outer tire has the advantages of high breaking strength, low rolling resistance, and excellent wet skid resistance and wear resistance.

Description

Technical Field

[0001] This invention belongs to the field of tire technology, specifically relating to a high-grip, rain- and sun-resistant electric motorcycle tire and its preparation method. Background Technology

[0002] In the technological development of electric motorcycle tires, rolling resistance, wet grip performance, wear resistance, and tensile strength are the four core indicators. To improve the range of electric motorcycles, existing technologies widely adopt the common low rolling resistance tire tread compound technology route, which optimizes the rubber compound formulation to reduce energy loss during tire rolling. However, this technology route has significant performance trade-offs: the low hysteresis rubber compound introduced to reduce rolling resistance usually leads to a decrease in the loss modulus E” at 0°C, directly weakening the tire's wet grip performance; at the same time, the reduction in rubber compound hysteresis is often accompanied by a deterioration in wear resistance, and adjustments to the cross-linking structure of the rubber compound may lead to insufficient tensile strength, thereby affecting the tire's tear and puncture resistance.

[0003] Chinese patent CN105623014B discloses a tire compound with ultra-high wear resistance and low rolling resistance, and its synthesis method. This compound outperforms ordinary tires in terms of rolling resistance, wet grip, ice and snow grip, and wear resistance. In this patent, the ratio of highly dispersed silica to high-structure, ultra-wear-resistant furnace black (N234) can reach 1:2. While silica's core advantage is reducing rolling resistance, its reinforcing efficiency, especially in wear resistance, is significantly lower than that of carbon black. Even with coupling agent modification, the interfacial bonding force between silica and rubber is still weaker than that of carbon black, and a high proportion of silica easily agglomerates, forming localized weak reinforcement areas, leading to a decrease in the compound's wear resistance. Furthermore, although the coupling agent X-50S is used to improve the compatibility between silica and rubber, the surface hydroxyl groups of silica easily form hydrogen bonds and agglomerate, causing localized silica agglomerates to become stress concentration points. During stretching, the agglomerates peel off from the rubber interface, triggering crack propagation and reducing tensile strength. Summary of the Invention

[0004] The purpose of this invention is to provide a high-grip, rain- and sun-resistant electric motorcycle tire and its preparation method. The rubber material used in the tire has excellent tensile strength, low rolling resistance, anti-slip properties, and wear resistance.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-grip, rain- and sun-resistant electric motorcycle tire, wherein the rubber compound used in the tire comprises the following components in parts by weight: oil-extended styrene-butadiene rubber: 110-120 parts, carbon black: 55-80 parts, N32 engine oil: 15-30 parts, zinc oxide: 3-5 parts, stearic acid: 2-2.5 parts, tackifying resin: 2-5 parts, C9 resin: 5-7 parts, antioxidant RD: 1.5-2.0 parts, protective wax: 1.0-2.0 parts, sulfur: 1.5-1.8 parts, accelerator: 2.7-3.4 parts, bio-based itaconic acid ester rubber of type Bio-IBR6401: 26-30 parts, rubber compound of type EVEC®236: 19-24 parts, and rubber compound of type EVEC®409: 12-16 parts.

[0007] The high tensile strength of the outer tire can withstand the tensile stress caused by frequent starts and stops and cornering during electric motorcycle operation, avoiding safety hazards such as tread tears and tire blowouts, and is suitable for complex road conditions such as gravel and potholes in urban areas. Bio-IBR6401 bio-based itaconic acid ester rubber is a high-performance tire compound. Adding it to oil-extended styrene-butadiene rubber can increase tensile strength, but rolling resistance is not ideal. This invention uses a specific amount of Bio-IBR6401 bio-based itaconic acid ester rubber, EVEC®236 compound, and EVEC®409 compound to synergistically enhance tensile strength while reducing rolling resistance with the cis-butadiene component of EVEC®236. This avoids the performance contradiction of high strength and high rolling resistance, achieving a balance between high safety and high strength, and low energy consumption and range.

[0008] The accelerator comprises the following components in parts by weight: 0.8-1.2 parts of accelerator CBS, 0.4-0.6 parts of accelerator TT, and 0.3-0.4 parts of accelerator MBT.

[0009] In existing technologies, accelerators are mainly used in combination with one or two accelerators, but the grip effect is not ideal when used in the system of this invention. This invention improves grip by using a combination of three accelerators. The reason for this is that the combination system of accelerators CBS, TT and MBT forms a gradient vulcanization synergistic effect: CBS delays the initial reaction rate of vulcanization, avoiding scorching during rubber processing and ensuring the stability of mixing and extrusion processes; MBT moderates the vulcanization process, complementing the ultra-fast vulcanization characteristics of TT, and precisely controlling the crosslinking density and uniformity of the rubber compound, so that the rubber forms a dense and elastic crosslinking network; this network can not only enhance the contact and adhesion between the rubber compound and the ground, but also absorb the impact force of the road surface through elastic deformation. Combined with the anti-slip properties of EVEC®236 and the adsorption effect of the polar groups of Bio-IBR6401 on the road surface, it significantly improves the coefficient of friction on dry / wet roads, thereby strengthening the grip of the tire and ensuring driving stability in both sunny and rainy weather.

[0010] The bio-based itaconic acid ester rubber is designated Bio-IBR6401. It is manufactured by Shandong Jingbo Zhongju New Materials Co., Ltd. The itaconic acid ester content is 60 wt%, and the bio-based carbon content is 23 wt%.

[0011] The EVEC®236 and EVEC®409 rubber compounds are both from Yikai New Materials Co., Ltd.

[0012] The carbon black includes N220 carbon black, N330 carbon black, and N234 carbon black in a mass ratio of (1.5-2):(2.6-3.1):1.

[0013] The external surface area of ​​the N220 carbon black is (99-113)×10 3 m 2 / kg, oil absorption value is (108-120)×10 -5 m3 / kg, Ningbo Detai Chemical Co., Ltd.

[0014] The external surface area of ​​the N330 carbon black is (69-81)×10 3 m 2 / kg, oil absorption value (96-108)×10 -5 m 3 / kg, Ningbo Detai Chemical Co., Ltd.

[0015] The external surface area of ​​the N234 carbon black is (105-119)×10 3 m 2 / kg, oil absorption value (118-132)×10-5m3 / kg, Ningbo Detai Chemical Co., Ltd.

[0016] Existing technologies do not consider the impact of surface area and oil absorption value on performance when selecting carbon black. Experiments have shown that the system of this invention, by using three different carbon blacks with varying surface areas and oil absorption values, can simultaneously improve abrasion resistance and tensile strength while enhancing wear resistance. Analysis shows that N220 carbon black has a high specific surface area, N330 carbon black has a medium specific surface area, and N234 carbon black has a high oil absorption value. When these three are blended in a specific ratio, they form a reinforcing system with high reinforcement and excellent dispersion. N220 and N234, with their high specific surface area and high oil absorption value, form strong physical adsorption and chemical bonding with the natural rubber molecular chains in EVEC®409 rubber compound and the itaconic acid groups of Bio-IBR6401, enhancing the interfacial bonding force between rubber and carbon black. N330 carbon black optimizes the problem of carbon black agglomeration, improves the dispersion uniformity of the reinforcing system in EVEC®236 butadiene rubber and styrene-butadiene rubber systems, and avoids local stress concentration. The dense reinforcing network constructed by the three together not only enhances the cohesive strength of the rubber compound with the help of the natural rubber component of EVEC®409, but also reduces molecular chain slippage and interfacial peeling during stretching through the cross-phase reinforcement of the three rubber phases by carbon black, ultimately achieving simultaneous improvement in abrasion resistance and tensile strength.

[0017] A method for preparing a high-grip, rain- and sun-resistant electric motorcycle tire includes the following steps:

[0018] (1) First stage of mixing: Add oil-extended styrene-butadiene rubber, bio-based itaconic acid ester rubber of model Bio-IBR6401, rubber compound of model EVEC®236, rubber compound of model EVEC®409, zinc oxide, stearic acid, 1068 resin, C9 resin, antioxidant RD, and protective wax. Mix at 145°C for 40 seconds. Continue to add N330 carbon black and half of the amount of N32 machine oil. Mix at 145°C for 50 seconds. Continue to add 220 carbon black, N234 carbon black, and the remaining machine oil. Mix at 145°C for 30 seconds. Remove the top plug, sweep away the powder, and discharge the rubber at 145°C. Press the rubber into sheets using a tablet press, cool it to room temperature, collect the sheets, and obtain the first stage of mixed rubber.

[0019] (2) Two-stage mixing: After the first-stage mixed rubber is left to stand for 8 hours, the first-stage rubber is added, and it is mixed at 145℃ for 90 seconds and discharged at 145℃. It is then pressed into tablets by a tablet press, cooled to below 45℃, and collected to obtain the second-stage rubber.

[0020] (3) Final rubber compound: Add the second stage rubber, sulfur, and accelerator, mix for 90 seconds at a mixing temperature of 100°C, and discharge the rubber; press the rubber into sheets using a sheet press, cool it to below 40°C, and collect the sheets to obtain the rubber compound used for tires.

[0021] (4) The rubber material used for the outer tire is used to make the outer tire.

[0022] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0023] 1. This invention achieves a balance between high safety and long range by synergistically adding specific amounts of Bio-IBR6401 bio-based itaconic acid ester rubber, EVEC®236 rubber compound and EVEC®409 rubber compound, which enhances tensile strength while reducing rolling resistance with the help of the cis-butadiene component of EVEC®236. This avoids the performance contradiction of high strength and high rolling resistance.

[0024] 2. By using three types of carbon black with different surface areas and oil absorption values, the system of the present invention can simultaneously improve wear resistance and tensile strength while improving abrasion performance.

[0025] 3. This invention improves tire grip by using a combination of three accelerators. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] All raw materials used in the following embodiments of the present invention are commercially available products:

[0028] Protective wax: Microcrystalline wax, Jining Fangde Chemical Co., Ltd.

[0029] Accelerator CBS, N-cyclohexyl-2-benzothiazole sulfenamide.

[0030] Accelerator TT, CAS: 137-26-8.

[0031] Accelerator MBT, chemical composition: 2-mercaptobenzothiazole, Shandong Yanggu Huatai Chemical Co., Ltd.

[0032] N32 engine oil, brand: Mobil, supplier: Shenzhen Yueteng Lubricating Oil Co., Ltd.

[0033] Zinc oxide, Tianjin Gaoke New Material Technology Co., Ltd., product number GK-ZnO-30.

[0034] C9 resin, Puyang Hengfeng Petrochemical Co., Ltd., model FST-C100.

[0035] Antioxidant RD, Hubei Xingyan New Material Technology Co., Ltd.

[0036] The chemical name of the oil-extended styrene-butadiene rubber is styrene-butadiene rubber (SBR) 1723, and the supplier is Hangzhou Yibang Rubber Co., Ltd.

[0037] The bio-based itaconic acid ester rubber is designated Bio-IBR6401. It is manufactured by Shandong Jingbo Zhongju New Materials Co., Ltd. The itaconic acid ester content is 60 wt%, and the bio-based carbon content is 23 wt%.

[0038] Both EVEC®236 and EVEC®409 rubber compounds are from Yikai New Materials Co., Ltd. EVEC®409 is a mixture of natural rubber and styrene-butadiene rubber, characterized by good abrasion resistance and tear resistance. EVEC®236 is a mixture of butadiene rubber and styrene-butadiene rubber, characterized by good wet grip and low rolling resistance.

[0039] Tackifying resin, model SP-1068, from Sigroup (USA), supplied by Dongguan Yuebang Rubber Technology Co., Ltd.

[0040] Equipment used: XM-180 / (4~40)Y internal mixer.

[0041] Installed volume: 128L.

[0042] Machine speed: 40 revolutions per minute.

[0043] Unloading conditions: 145℃. Example 1

[0044] This embodiment provides a high-grip, rain- and sun-resistant electric motorcycle tire. The rubber compound used in the tire comprises the following components in parts by weight: oil-extended styrene-butadiene rubber: 114 parts, carbon black: 57 parts, N32 engine oil: 22 parts, zinc oxide: 4 parts, stearic acid: 2.2 parts, tackifying resin: 4 parts, C9 resin: 6 parts, antioxidant RD: 1.7 parts, protective wax: 1.4 parts, sulfur: 1.7 parts, accelerator: 3.0 parts, bio-based itaconic acid ester rubber (Bio-IBR6401) 27 parts, rubber compound (EVEC®236) 21 parts, and rubber compound (EVEC®409) 15 parts.

[0045] The accelerator comprises the following components in parts by weight: 1.0 part of accelerator CBS, 0.5 part of accelerator TT, and 0.35 part of accelerator MBT.

[0046] Carbon black includes N220 carbon black, N330 carbon black, and N234 carbon black in a mass ratio of 1.6:2.7:1. The external surface area of ​​N220 carbon black is (99-113) × 10⁻¹⁰. 3 m 2 / kg, oil absorption value is (108-120)×10 -5 m3 / kg, Ningbo Detai Chemical Co., Ltd. The external surface area of ​​N330 carbon black is (69-81)×10 3 m 2 / kg, oil absorption value (96-108)×10 -5m 3 / kg, Ningbo Detai Chemical Co., Ltd. The external surface area of ​​N234 carbon black is (105-119) × 10 3 m 2 / kg, oil absorption value is (118-132)×10 -5 m 3 / kg, Ningbo Detai Chemical Co., Ltd.

[0047] The above-mentioned method for preparing a high-grip, rain- and sun-resistant electric motorcycle tire includes the following steps:

[0048] (1) First stage of mixing: Add oil-extended styrene-butadiene rubber 1723, bio-based itaconic acid ester rubber of model Bio-IBR6401, rubber compound of model EVEC®236, rubber compound of model EVEC®409, zinc oxide, stearic acid, 1068 resin, C9 resin, antioxidant RD, and protective wax. Mix at 145°C for 40 seconds. Continue to add N330 carbon black and half of the amount of N32 machine oil. Mix at 145°C for 50 seconds. Continue to add 220 carbon black, N234 carbon black, and the remaining machine oil. Mix at 145°C for 30 seconds. Remove the top plug, sweep away the powder, and discharge the rubber at 145°C. Press the rubber into sheets using a tablet press, cool it to room temperature, collect the sheets, and obtain the first stage of mixed rubber.

[0049] (2) Two-stage mixing: After the first-stage mixed rubber is left to stand for 8 hours, the first-stage rubber is added, and it is mixed at 145℃ for 90 seconds and discharged at 145℃. It is then pressed into tablets by a tablet press, cooled to below 45℃, and collected to obtain the second-stage rubber.

[0050] (3) Final rubber compound: Add the second stage rubber, sulfur, and accelerator, mix for 90 seconds at a mixing temperature of 100°C, and discharge the rubber; press the rubber into sheets using a sheet press, cool it to below 40°C, and collect the sheets to obtain the rubber compound used for tires.

[0051] (4) The rubber material used for the outer tire is used to make the outer tire. Example 2

[0052] This embodiment provides a high-grip, rain- and sun-resistant electric motorcycle tire. The rubber compound used in the tire comprises the following components in parts by weight: oil-extended styrene-butadiene rubber: 120 parts, carbon black: 55 parts, N32 engine oil: 30 parts, zinc oxide: 3 parts, stearic acid: 2.5 parts, tackifying resin: 2 parts, C9 resin: 7 parts, antioxidant RD: 1.5 parts, protective wax: 2.0 parts, sulfur: 1.5 parts, accelerator: 3.4 parts, bio-based itaconic acid ester rubber (model Bio-IBR6401) 26 parts, rubber compound (model EVEC®236) 24 parts, and rubber compound (model EVEC®409) 12 parts.

[0053] The accelerator comprises the following components in parts by weight: 0.8 parts of accelerator CBS, 0.6 parts of accelerator TT, and 0.3 parts of accelerator MBT.

[0054] Carbon black includes N220 carbon black, N330 carbon black, and N234 carbon black in a mass ratio of 2:3.1:1. The external surface area of ​​N220 carbon black is (99-113)×10 3 m 2 / kg, oil absorption value is (108-120)×10 -5 m 3 / kg, Ningbo Detai Chemical Co., Ltd. The external surface area of ​​N330 carbon black is (69-81) × 10 3 m 2 / kg, oil absorption value (96-108)×10 -5 m 3 / kg, Ningbo Detai Chemical Co., Ltd. The external surface area of ​​N234 carbon black is (105-119) × 10 3 m 2 / kg, oil absorption value is (118-132)×10 -5 m 3 / kg, Ningbo Detai Chemical Co., Ltd.

[0055] The above-mentioned method for preparing a high-grip, rain- and sun-resistant electric motorcycle tire includes the following steps:

[0056] (1) First stage of mixing: Add oil-extended styrene-butadiene rubber 1723, bio-based itaconic acid ester rubber of model Bio-IBR6401, rubber compound of model EVEC®236, rubber compound of model EVEC®409, zinc oxide, stearic acid, 1068 resin, C9 resin, antioxidant RD, and protective wax. Mix at 145°C for 40 seconds. Continue to add N330 carbon black and half of the amount of N32 machine oil. Mix at 145°C for 50 seconds. Continue to add 220 carbon black, N234 carbon black, and the remaining machine oil. Mix at 145°C for 30 seconds. Remove the top plug, sweep away the powder, and discharge the rubber at 145°C. Press the rubber into sheets using a tablet press, cool it to room temperature, collect the sheets, and obtain the first stage of mixed rubber.

[0057] (2) Two-stage mixing: After the first-stage mixed rubber is left to stand for 8 hours, the first-stage rubber is added, and it is mixed at 145℃ for 90 seconds and discharged at 145℃. It is then pressed into tablets by a tablet press, cooled to below 45℃, and collected to obtain the second-stage rubber.

[0058] (3) Final rubber compound: Add the second stage rubber, sulfur, and accelerator, mix for 90 seconds at a mixing temperature of 100°C, and discharge the rubber; press the rubber into sheets using a sheet press, cool it to below 40°C, and collect the sheets to obtain the rubber compound used for tires.

[0059] (4) The rubber material used for the outer tire is used to make the outer tire.

[0060] Comparative Example 1

[0061] The difference between this comparative example and Example 1 is that "27 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401, 21 parts of rubber compound of model EVEC®236, and 15 parts of rubber compound of model EVEC®409" are replaced with 63 parts of bio-based itaconic acid ester of model Bio-IBR6401.

[0062] Comparative Example 2

[0063] The difference between this comparative example and Example 1 is that "27 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401, 21 parts of rubber compound of model EVEC®236, and 15 parts of rubber compound of model EVEC®409" are replaced with: 27 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401 and 36 parts of rubber compound of model EVEC®236.

[0064] Comparative Example 3

[0065] The difference between this comparative example and Example 1 is that "27 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401, 21 parts of rubber compound of model EVEC®236, and 15 parts of rubber compound of model EVEC®409" are replaced with "27 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401 and 36 parts of rubber compound of model EVEC®409".

[0066] Comparative Example 4

[0067] The difference between this comparative example and Example 1 is that "27 parts of Bio-IBR6401 bio-based itaconic acid ester rubber, 21 parts of EVEC®236 rubber compound, and 15 parts of EVEC®409 rubber compound" are replaced with 37 parts of Bio-IBR6401 bio-based itaconic acid ester rubber, 16 parts of EVEC®236 rubber compound, and 10 parts of EVEC®409 rubber compound.

[0068] Comparative Example 5

[0069] The difference between this comparative example and Example 1 is that "27 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401, 21 parts of rubber compound of model EVEC®236, and 15 parts of rubber compound of model EVEC®409" are replaced with: 17 parts of bio-based itaconic acid ester rubber of model Bio-IBR6401, 26 parts of rubber compound of model EVEC®236, and 20 parts of rubber compound of model EVEC®409.

[0070] Comparative Example 6

[0071] The difference between this comparative example and Example 1 is that the carbon black includes N220 carbon black and N330 carbon black in a mass ratio of 1.6:2.7.

[0072] Comparative Example 7

[0073] The difference between this comparative example and Example 1 is that the carbon black includes N220 carbon black, N330 carbon black, and N234 carbon black in a mass ratio of 1:1:1.

[0074] Comparative Example 8

[0075] The difference between this comparative example and Example 1 is that the accelerator includes the following components in parts by mass: 1.0 part of accelerator CBS and 0.5 parts of accelerator TT.

[0076] Comparative Example 9

[0077] The difference between this comparative example and Example 1 is that the accelerator includes the following components in parts by mass: 1.5 parts of accelerator CBS, 0.2 parts of accelerator TT and 0.6 parts of accelerator MBT.

[0078] Comparative Example 10

[0079] This comparative example is a product prepared according to CN105623014B, which describes a tire compound with ultra-high wear resistance and low rolling resistance, and its synthesis method.

[0080] Performance testing

[0081] The performance of the rubber compounds used in the tires prepared in Examples 1-2 and Comparative Examples 1-10 was tested.

[0082] Tensile strength: GB / T528-2009.

[0083] Akron abrasion performance: GB / T1689-2014.

[0084] Rolling resistance: loss factor Tanδ, 60℃, ASTM D4065-20.

[0085] Wet grip: loss modulus E”, 0℃, ISO6721-1:2019.

[0086] The performance test results are shown in Table 1.

[0087] Table 1 Performance Test Results

[0088]

[0089] As shown in Table 1, the tensile strength of the rubber compound used in the tires of Examples 1-2 is 15.1-15.7 MPa, and the abrasion resistance is 0.26-0.27 cm. 3 / 1.61km. The loss factor Tanδ of rolling resistance tested at 60℃ is 0.20-0.22, and the loss modulus E” of wet grip tested at 0℃ is 11.72-11.94. The overall performance is better than the existing technology of Comparative Example 10.

[0090] Comparative Example 1 used only Bio-IBR6401 bio-based itaconic acid ester rubber, which lacked the low rolling resistance of EVEC®236 and the synergistic abrasion and tear resistance of EVEC®409, resulting in increased rolling resistance and a significant decrease in abrasion and tensile strength.

[0091] In Comparative Example 2, no EVEC®409 compound was added. The abrasion resistance and tear resistance provided by natural rubber were lost, resulting in deteriorated abrasion performance and insufficient tensile strength. Although the rolling resistance was low, the overall performance was unbalanced.

[0092] In Comparative Example 3, without the addition of EVEC®236 compound, the low rolling resistance advantage of butadiene rubber was lost, the rolling resistance increased, and the anti-slip synergy with Bio-IBR6401 was lacking, resulting in a decrease in wet grip.

[0093] In Comparative Example 4, the proportions of the three functional rubber compounds were changed, and the amounts of EVEC®236 and EVEC®409 were insufficient, resulting in a decrease in rolling resistance, abrasion performance, and tensile strength.

[0094] In Comparative Example 5, the insufficient amount of Bio-IBR6401 weakened its synergistic effect with other rubber compounds in wet skid resistance, while the excessive amount of EVEC®409 did not further improve performance, but instead slightly increased rolling resistance.

[0095] In Comparative Example 6, the lack of the reinforcing effect of the high oil absorption value of N234 carbon black resulted in a significant decrease in wear resistance and tensile strength.

[0096] In Comparative Example 7, the carbon black ratio was changed, and the insufficient amount of N330 carbon black led to uneven carbon black dispersion, reduced reinforcing efficiency, and decreased abrasion and tensile strength.

[0097] In Comparative Example 8, the lack of the medium-speed regulating effect of the accelerator MBT resulted in a poorer gradient vulcanization effect, uneven cross-linking network, significantly reduced wet grip, and worsened abrasion performance.

[0098] In Comparative Example 9, the change in the accelerator ratio and the imbalance between CBS and MBT dosages led to a poorer vulcanization effect, a decrease in crosslinking uniformity, and a reduction in wet grip and tensile strength.

[0099] 2. The outer tire prepared in Example 1 was tested according to GB / T13203-2021, and the results are shown in Table 2.

[0100] Table 2. Results of Tire Performance Testing

[0101]

[0102] The results show that the tire of Example 1 exhibits a strength performance with a breaking energy of no less than 34 J at each test point, meeting the requirements; its durability performance meets the requirements of Clause 4.5.2 of GB518-2020 after a 34-hour test; and its high-speed performance meets the requirements of Clause 4.5.3 of GB518-2020 after a cumulative driving time of 3 hours and 30 minutes at 110 km / h. All performance indicators demonstrate excellent performance, indicating that the tire possesses good mechanical strength, durability, reliability, and high-speed stability.

[0103] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-grip, rain- and sun-resistant dual-use electric motorcycle tire, characterized in that, The rubber compound used in the outer tire comprises the following components in parts by weight: oil-extended styrene-butadiene rubber: 110-120 parts, carbon black: 55-80 parts, engine oil: 15-30 parts, zinc oxide: 3-5 parts, stearic acid: 2-2.5 parts, tackifying resin: 2-5 parts, C9 resin: 5-7 parts, antioxidant: 1.5-2.0 parts, protective wax: 1.0-2.0 parts, sulfur: 1.5-1.8 parts, accelerator: 2.7-3.4 parts, bio-based itaconic acid ester rubber: 26-30 parts, EVEC®236 rubber compound: 19-24 parts, and EVEC®409 rubber compound: 12-16 parts.

2. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 1, characterized in that, The accelerators include accelerator CB, accelerator TT, and accelerator MBT.

3. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 2, characterized in that, The accelerator comprises the following components in parts by weight: 0.8-1.2 parts of accelerator CBS, 0.4-0.6 parts of accelerator TT, and 0.3-0.4 parts of accelerator MBT.

4. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 1, characterized in that, The bio-based itaconic acid ester rubber is designated Bio-IBR6401.

5. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 1, characterized in that, The carbon black includes N220 carbon black, N330 carbon black and N234 carbon black.

6. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 5, characterized in that, The carbon black comprises N220 carbon black, N330 carbon black, and N234 carbon black in a mass ratio of (1.5-2):(2.6-3.1):

1.

7. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 6, characterized in that, The external surface area of ​​the N220 carbon black is (99-113)×10 3 m 2 / kg, oil absorption value is (108-120)×10 -5 m 3 / kg.

8. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 6, characterized in that, The external surface area of ​​the N330 carbon black is (69-81)×10 3 m 2 / kg, oil absorption value (96-108)×10 -5 m 3 / kg.

9. The high-grip, rain- and sun-resistant dual-purpose electric motorcycle tire according to claim 6, characterized in that, The external surface area of ​​the N234 carbon black is (105-119)×10 3 m 2 / kg, oil absorption value is (118-132)×10 -5 m 3 / kg.

10. A method for preparing a high-grip, rain- and sun-resistant dual-use electric motorcycle tire according to any one of claims 1-9, characterized in that, Includes the following steps: (1) First stage of mixing: Add oil-extended styrene-butadiene rubber, bio-based itaconic acid ester rubber of model Bio-IBR6401, rubber compound of model EVEC®236, rubber compound of model EVEC®409, zinc oxide, stearic acid, tackifying resin, C9 resin, antioxidant, and protective wax to the internal mixer and mix. Then add N330 carbon black and half of the machine oil and mix. Then add 220 carbon black, N234 carbon black and the remaining machine oil and mix. Discharge the rubber. Press the rubber into sheets using a sheeting machine, cool it to room temperature, collect the sheets, and obtain the first stage of mixed rubber. (2) Two-stage mixing: Add the mixing rubber, re-mix, and discharge the rubber; press it into tablets using a tablet press, cool it, collect the tablets, and obtain the two-stage rubber; (3) Final rubber compound: Add the second stage rubber, sulfur, and accelerator, mix and discharge the rubber; press the rubber into sheets using a sheet press, cool and collect the sheets to obtain the rubber compound used for tires; (4) The rubber material used for the outer tire is used to make the outer tire.

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