Elastomer composite material and application thereof in shoulder cushion rubber of tire

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to an elastomer composite material and application thereof in shoulder cushion rubber of a tire. The elastomer composite material is prepared from 85 to 100 parts of high-end natural rubber, 0 to 15 parts of 1, 4-polybutadiene polymer, 6 to 12 parts of zinc oxide, 2 to 5 parts of stearic acid, 25 to 45 parts of carbon black, 5 to 15 parts of white carbon black, 1.1 to 1.9 parts of silane coupling agent, 3 to 10 parts of aromatic oil, 1.7 to 5.2 parts of anti-aging agent, 0.4 to 1 part of low rolling resistance modifier, 1.3 to 1.9 parts of insoluble sulfur, 0.2 to 1.2 parts of sulfenamide accelerant, 0.3 to 1.5 parts of anti-vulcanization reducing agent and 0.1 to 0.6 part of scorch retarder. The elastomer composite material provided by the invention can transfer and absorb stress concentrated on a tire shoulder part under a dynamic condition, has the performance characteristics of high tear strength and relatively low heat generation, and is suitable for tire shoulder cushion rubber of an aircraft tire.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of high polymer materials, and particularly relates to an elastomer composite material and application thereof in shoulder cushioning pad rubber of a tire. BACKGROUND

[0002] Due to the severe use conditions of large aircraft tires, such as large load and low air pressure, the matching degree between materials is required to be high. The shoulder region of an aviation radial tire is deformed greatly, generates heat highly, and the stress distribution is extremely complex. The shoulder region is the area where defects, such as shoulder void, shoulder crack and delamination, are most likely to occur, which affects the safe use of the aviation tire. The shoulder cushioning pad rubber is an important component of the aviation radial tire, and is located at the shoulder of the finished tire, which plays a role in transitioning from the carcass to the belt, cushioning the curved profile of the carcass layer, and making the belt layer as flat as possible, and determines the stress state and deformation of the shoulder components.

[0003] Due to the fact that the shoulder region of the aviation tire bears several thousand times of periodic shear stress per second during take-off and landing, and the internal temperature of the shoulder can reach 120-180 DEG C during high-speed sliding, the dynamic heat generation of the rubber material accelerates the thermal oxidative aging. In this case, the traditional formula rubber material has the problem of reduced adhesion strength between the shoulder cushioning pad rubber and the carcass layer and the belt layer, and shows the disadvantage of poor high-temperature performance stability. In the traditional single natural rubber system, the long chains of natural rubber are prone to form crystalline regions during stretching, and the chain segment friction generates heat significantly during dynamic deformation, which has the disadvantage of high heat generation. Therefore, it is difficult to balance the tear strength and heat generation performance. SUMMARY

[0004] The present application aims to provide an elastomer composite material and application thereof in shoulder cushioning pad rubber of a tire. The elastomer composite material provided by the present application can effectively transfer and absorb the stress concentrated in the shoulder under dynamic conditions, reduce the heat generation of the tire shoulder, reduce the stress concentration of the tire shoulder, make the stress uniform, and has the performance characteristics of high tear strength and low heat generation, which is very suitable for the shoulder cushioning pad rubber of large radial aircraft tires.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: The present application provides an elastomer composite material, which comprises the following components in mass fraction: High-end natural rubber 85~100 parts, 1,4-polybutadiene polymer 0~15 parts, and not 0, zinc oxide 6~12 parts, stearic acid 2~5 parts, carbon black 25~45 parts, white carbon black 5~15 parts, silane coupling agent 1.1~1.9 parts, aromatic oil 3~10 parts, antioxidant 1.7~5.2 parts, low rolling resistance modifier 0.4~1 part, insoluble sulfur 1.3~1.9 parts, sulfenamide accelerator 0.2~1.2 parts, anti-reversion agent 0.3~1.5 parts, anti-scorching agent 0.1~0.6 parts; The parameters of the high-end natural rubber include: tensile strength ≥25 MPa, elongation at break ≥810%, tear strength ≥30 kN / m, and compression fatigue temperature rise ≤10℃. The carbon black includes N660 carbon black, and the carbon black also includes N220 carbon black and / or N234 carbon black. The antioxidant includes p-phenylenediamine antioxidant 4020 and ketone amine antioxidant RD.

[0006] Preferably, in the elastomer composite: the mass fraction of N660 carbon black is 20~35 parts, and the mass fraction of N220 carbon black and / or N234 carbon black is 5~15 parts.

[0007] Preferably, in the elastomer composite: the mass fraction of p-phenylenediamine antioxidant 4020 is 1.1~4 parts, and the mass fraction of ketone amine antioxidant RD is 0.6~1.2 parts.

[0008] Preferably, the content of cis-structure polymer in the 1,4-polybutadiene polymer is ≥95wt%, the zinc oxide is indirect zinc oxide, and the white carbon black is precipitated white carbon black.

[0009] Preferably, the silane coupling agent is silane coupling agent KH-845-4, the aromatic oil includes aromatic oil TDAE and / or aromatic oil DAE, and the low rolling resistance modifier is low rolling resistance modifier RK602L.

[0010] Preferably, the insoluble sulfur is insoluble sulfur IS-60, the sulfenamide accelerator includes one or more of accelerators CZ, NS and DZ, the anti-reversion agent is anti-reversion agent WK-901 and / or anti-reversion agent PK900, and the anti-scorching agent is anti-scorching agent CTP.

[0011] The application provides application of the elastomer composite in a tire shoulder cushion pad.

[0012] The application provides a tire, which includes a tire shoulder cushion pad, and the tire shoulder cushion pad is obtained by using the elastomer composite.

[0013] Preferably, the tire is an aircraft tire.

[0014] The application provides a preparation method of the tire, and comprises the following steps: The components of the elastomer composite are mixed to obtain a rubber compound; The rubber compound is extruded to obtain a tire shoulder cushion rubber semi-product; The tire shoulder cushion rubber semi-product is combined with other components of the tire to obtain a tire blank; The tire blank is subjected to vulcanization treatment to obtain the tire.

[0015] The application provides an elastomer composite, which comprises the following components in mass fractions: 85-100 parts of high-end natural rubber, 0-15 parts of 1,4-polybutadiene polymer (i.e., cis-butadiene rubber), and the 1,4-polybutadiene polymer is not 0, 6-12 parts of zinc oxide, 2-5 parts of stearic acid, 25-45 parts of carbon black, 5-15 parts of white carbon black, 1.1-1.9 parts of silane coupling agent, 3-10 parts of aromatic oil, 1.7-5.2 parts of antioxidant, 0.4-1 part of low-rolling-resistance modifier, 1.3-1.9 parts of insoluble sulfur, 0.2-1.2 parts of sulfenamide type accelerator, 0.3-1.5 parts of anti-reversion agent, and 0.1-0.6 parts of anti-scorching agent; the high-end natural rubber has the following parameters: tensile strength is greater than or equal to 25 MPa, elongation at break is greater than or equal to 810%, tear strength is greater than or equal to 30 kN / m, and compression fatigue temperature rise is less than or equal to 10 DEG C; the carbon black comprises N660 carbon black, and the carbon black further comprises N220 carbon black and / or N234 carbon black; the antioxidant comprises p-phenylenediamine type antioxidant 4020 and ketone amine type antioxidant RD.

[0016] The present application solves the problem that in the traditional single natural rubber system, the long chain of natural rubber is easy to form a crystalline region in the stretching process, and the chain segment generates heat by friction during dynamic deformation, causing the system to generate heat too high. The present application uses high-end natural rubber as the main material, replaces 1# tobacco sheet rubber with high-end natural rubber, and uses it in combination with 1,4-polybutadiene polymer. The molecular chain of 1,4-polybutadiene polymer has good flexibility, so it has the advantage of low heat generation. At the same time, the present application optimizes the mass ratio of high-end natural rubber and 1,4-polybutadiene polymer, so as to take advantage of the high tear resistance of high-end natural rubber caused by the easy crystallization of long chain and the low heat generation of 1,4-polybutadiene polymer caused by the flexibility of long chain. The balance and synchronous improvement of the tear resistance and heat generation of the elastomer composite material are realized. In addition, when the present application tries to use single N660 carbon black for reinforcement, the reinforcement efficiency is low, the reinforcement performance is weak, and the dynamic performance is insufficient. In the present application, the silane coupling agent is compounded. The silane coupling agent can improve the surface performance of N660 carbon black, reduce the oil absorption value of N660 carbon black, and improve its dispersibility in the rubber compound. At the same time, the present application further compounds N220 carbon black and / or N234 carbon black to form a matching system. N220 carbon black and / or N234 carbon black provides high reinforcement, and N660 carbon black compounded with silane coupling agent can also improve the processing fluidity of the material and alleviate the high heat generation disadvantage of N220 carbon black and / or N234 carbon black when used alone, and reduce the cost. Therefore, by optimizing the compounding method of carbon black, by adding N660 carbon black with high graphitization structure, smooth surface, high specific surface area and good dispersibility, the rubber compound has good modulus, processing performance and low heat generation. And cooperate with the addition of super wear-resistant carbon black (N220 carbon black and / or N234 carbon black), ensure the mechanical properties of the rubber compound. Finally, the present application adds an anti-vulcanization reversion agent to make the rubber compound have excellent thermal stability and dynamic balance. Antioxidant RD has excellent protective effect on thermal oxidation, but the protective effect on flex fatigue aging is poor. Antioxidant 4020 has excellent protective effect on ozone aging and flex fatigue aging. The combination of antioxidant RD and antioxidant 4020 can significantly improve the aging resistance of tire rubber products, especially rubber products used under dynamic conditions. Therefore, by adding an anti-reduction agent, antioxidant RD and antioxidant 4020, and a low rolling resistance modifier to form a matching system, the high temperature performance stability of the product is improved. In summary, the present application has the advantages of high tear resistance and low heat generation by reasonably equipping the components in the formula. The present application is used in large aircraft tires. The tire will not have quality problems such as shoulder emptying, shoulder cracking, delamination, etc. under the use conditions of large load and low air pressure, ensuring the safety of the tire in use.

[0017] Further, in the present application, the low rolling resistance modifier is low rolling resistance modifier RK602L. The low rolling resistance modifier RK602L can react with aldehyde / ketone carbonyl, etc., enhance the interaction between rubber and filler, can significantly reduce the dynamic heat generation, and improve the mechanical properties of the rubber compound, solve the problem of poor high temperature performance stability of the traditional formula rubber compound. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic view of a longitudinal cutting structure of a tire is shown in the figure. In the figure, 1 is the tread rubber, 2 is the belt layer, 3 is the shoulder cushion rubber, 4 is the carcass layer, 5 is the sidewall, and 6 is the tire bead. DETAILED DESCRIPTION

[0019] The present application provides an elastomer composite material, comprising the following components by mass fraction: high-end natural rubber 85-100 parts, 1,4-polybutadiene polymer 0-15 parts, zinc oxide 6-12 parts, stearic acid 2-5 parts, carbon black 25-45 parts, white carbon black 5-15 parts, silane coupling agent 1.1-1.9 parts, aromatic oil 3-10 parts, antioxidant 1.7-5.2 parts, low rolling resistance modifier 0.4-1 part, insoluble sulfur 1.3-1.9 parts, sulfenamide accelerator 0.2-1.2 parts, anti-reduction agent 0.3-1.5 parts, and anti-scorching agent 0.1-0.6 parts; The parameters of the high-end natural rubber include: tensile strength ≥ 25 MPa, elongation at break ≥ 810%, tear strength ≥ 30 kN / m, and compression fatigue temperature rise ≤ 10℃. The carbon black includes N660 carbon black, and the carbon black also includes N220 carbon black and / or N234 carbon black. The antioxidant includes p-phenylenediamine antioxidant 4020 and ketone amine antioxidant RD.

[0020] In the present application, all the raw materials / components are commercially available products known to those skilled in the art, unless otherwise specified.

[0021] The elastomer composite material provided by the present application includes high-end natural rubber 85-100 parts by mass fraction, which can be 85 parts, 90 parts, 95 parts or 100 parts in the examples. In the present application, the parameters of the high-end natural rubber include: tensile strength ≥ 25 MPa, elongation at break ≥ 810%, tear strength ≥ 30 kN / m, and compression fatigue temperature rise ≤ 10℃.

[0022] In the present application, the manufacturer of the high-end natural rubber is Yunnan Natural Rubber Industry Group Jiangcheng Co., Ltd.

[0023] In the present application, the product parameters of the high-end natural rubber are preferably as shown in Table 1: Table 1 Product parameters of high-end natural rubber

[0024] In the present application, the tensile strength, tear strength and elongation at break of the high-end natural rubber are all significantly higher than those of 1# tobacco sheet rubber (imported from Indonesia), and the performance comparison results of the high-end natural rubber used in the present application and 1# tobacco sheet rubber are shown in Table 2.

[0025] Table 2 Comparison of natural rubber performance

[0026] Based on the mass fraction of the high-end natural rubber, the elastomer composite provided by the present application includes 0-15 parts of 1,4-polybutadiene polymer, which can be 5 parts, 10 parts or 15 parts in the examples. In the present application, the content of cis-structure polymer in the 1,4-polybutadiene polymer is ≥ 95wt%.

[0027] Based on the mass fraction of the high-end natural rubber, the elastomer composite provided by the present application includes 6-12 parts of zinc oxide, which can be 6 parts, 10 parts or 12 parts in the examples. In the present application, the zinc oxide is preferably indirect zinc oxide.

[0028] Based on the mass fraction of the high-end natural rubber, the elastomer composite provided by the present application includes 2-5 parts of stearic acid, which can be 2 parts, 4 parts or 5 parts in the examples.

[0029] Based on the mass fraction of the high-end natural rubber, the elastomer composite provided by the present application includes 25-45 parts of carbon black, which can be 30 parts or 40 parts in the examples.

[0030] In the present application, the mass fraction of N660 carbon black in the elastomer composite is preferably 20-35 parts, which can be 20 parts, 25 parts or 30 parts in the examples. The mass fraction of N220 carbon black and / or N234 carbon black in the elastomer composite is preferably 5-15 parts, which can be 5 parts, 10 parts or 15 parts in the examples.

[0031] Based on the mass fraction of the high-end natural rubber, the elastomer composite provided by the present application includes 5-15 parts of white carbon black, which can be 5 parts, 7 parts, 9 parts or 10 parts in the examples. In the present application, the white carbon black is preferably precipitated white carbon black.

[0032] Based on the mass fraction of the high-end natural rubber, the elastomer composite provided by the present application includes 1.1-1.9 parts of silane coupling agent, which can be 1.3 parts or 1.5 parts in the examples. In the present application, the silane coupling agent is preferably silane coupling agent KH-845-4.

[0033] The elastomer composite provided by the application includes 3-10 parts of aromatic oil based on the mass fraction of the high-end natural rubber, which can be 3 parts, 4 parts or 5 parts in the embodiments. In the application, the aromatic oil preferably includes aromatic oil TDAE and / or aromatic oil DAE. In the application, the mass fraction of the aromatic oil TDAE is preferably 3-7 parts, which can be 3 parts or 5 parts in the embodiments. The mass fraction of the aromatic oil DAE is preferably 0-3 parts, and is not 0, which can be 1 part or 2 parts in the embodiments.

[0034] The elastomer composite provided by the application includes 1.7-5.2 parts of antioxidant based on the mass fraction of the high-end natural rubber, which can be 2.8 parts, 3 parts, 4 parts, 3.8 parts, 4.8 parts, 5 parts or 5.2 parts in the embodiments. In the application, the mass fraction of the p-phenylenediamine antioxidant 4020 in the elastomer composite is preferably 1.1-4 parts, which can be 2 parts, 3 parts or 4 parts in the embodiments. The mass fraction of the ketone amine antioxidant RD in the elastomer composite is preferably 0.6-1.2 parts, which can be 0.8 parts, 1 part or 1.2 parts in the embodiments.

[0035] The elastomer composite provided by the application includes 0.4-1 part of low-rolling-resistance modifier based on the mass fraction of the high-end natural rubber, which can be 0.5 parts, 0.6 parts or 0.8 parts in the embodiments. In the application, the low-rolling-resistance modifier is low-rolling-resistance modifier RK602L. The low-rolling-resistance modifier RK602L used in the embodiments of the application is purchased from Jiangsu Ruiba New Material Technology Co., Ltd.

[0036] The elastomer composite provided by the application includes 1.3-1.9 parts of insoluble sulfur based on the mass fraction of the high-end natural rubber, which can be 1.3 parts, 1.5 parts, 1.7 parts or 1.9 parts in the embodiments. In the application, the insoluble sulfur is insoluble sulfur IS-60.

[0037] The elastomer composite provided by the application includes 0.2-1.2 parts of sulfenamide accelerator based on the mass fraction of the high-end natural rubber, which can be 0.3 parts, 0.5 parts, 0.7 parts or 1 part in the embodiments. In the application, the sulfenamide accelerator preferably includes one or more of accelerators CZ, NS and DZ.

[0038] The elastomer composite provided by the application includes 0.3-1.5 parts of anti-vulcanization reducing agent based on the mass fraction of the high-end natural rubber, which can be 0.3 parts, 0.5 parts, 0.8 parts or 1.1 parts in the embodiments. In the application, the anti-vulcanization reducing agent is preferably anti-vulcanization reducing agent WK-901 and / or anti-vulcanization reducing agent PK900.

[0039] Based on the mass fraction of the high-end natural rubber, the elastomer composite material provided by this invention includes 0.1 to 0.6 parts of an anti-scorching agent, which can be 0.1, 0.3, or 0.5 parts in the embodiments. In this invention, the anti-scorching agent is preferably CTP.

[0040] This invention provides the application of the elastomeric composite material described above in the tire shoulder cushioning pad rubber.

[0041] The present invention provides a tire, the tire including a shoulder cushion rubber, the shoulder cushion rubber being obtained using the elastomeric composite material described in the above technical solution.

[0042] The tire provided by this invention is as follows Figure 1 As shown, the tire shoulder cushion rubber is located on the shoulder of the finished tire, serving as a transition from the carcass layer 4 to the belt layer 2, smoothing the curved contour of the carcass layer, and making the belt layer as straight as possible. It determines the stress state and deformation of each component on the shoulder. The elastomeric composite material provided by this invention uses high-end natural rubber as the main material, and also forms a raw rubber system with 1,4-polybutadiene polymer (cis structure above 95%). It also adds general-purpose carbon black, medium-to-high wear-resistant carbon black, sulfur, environmentally friendly aromatic oil, heat stabilizer, accelerator, low rolling resistance modifier RK602L, anti-reversion agent, antioxidant, and other auxiliary materials to optimize the mass ratio of the components. The elastomeric composite material provided by this invention has the performance characteristics of high tear strength and low heat generation.

[0043] In this invention, the tire is preferably an aircraft tire, and in the embodiments it can be a large radial aircraft tire.

[0044] This invention provides a method for manufacturing the tire described in the above technical solution, comprising the following steps: The components of the elastomeric composite material are mixed to obtain a compound; The compounded rubber is extruded to obtain a semi-finished product of tire shoulder cushioning pad rubber; The semi-finished tire shoulder cushion rubber is combined with other tire components to form a tire blank; The tire blank is vulcanized to obtain the tire.

[0045] The present application mixes the components of the elastomer composite to obtain a rubber compound. In the present application, the mixing is preferably carried out in an internal mixer. The rotation speed of the mixing is preferably 40-45 r / min. The feeding sequence of the mixing is preferably: high-end natural rubber, 1,4-polybutadiene polymer → white carbon black, zinc oxide, antioxidant 4020, low rolling resistance modifier → N660 carbon black, N220 carbon black and / or N234 carbon black, silane coupling agent, aromatic oil → insoluble sulfur, anti-reduction agent, sulfenamide accelerator, and anti-scorching agent CTP. In the present application, the mixing preferably includes 2-3 times of releasing the ejector pin, and the mixing is discharged to obtain a rubber compound sheet.

[0046] After obtaining the rubber compound, the present application extrudes the rubber compound to obtain a tire shoulder cushion pad semi-product. In the present application, the extrusion is preferably carried out in an extruder.

[0047] After obtaining the tire shoulder cushion pad semi-product, the present application combines the tire shoulder cushion pad semi-product with other components of the tire to form a tire blank. In the present application, the combination is preferably carried out in a building machine.

[0048] After obtaining the tire blank, the present application carries out a vulcanization treatment on the tire blank to obtain the tire. In the present application, the vulcanization treatment is preferably carried out in a curing machine.

[0049] The present application provides an elastomer composite. The elastomer composite provided by the present application can transfer and absorb the stress concentrated on the tire shoulder under dynamic conditions, reduce the risk of tire separation, and is suitable for the tire shoulder cushion pad of large radial aircraft tires. The elastomer composite provided by the present application can reduce the heat generation of the tire shoulder, reduce the stress concentration of the tire shoulder, make the stress dispersion uniform, has the performance characteristics of high tear resistance and low heat generation, and the performance range of the elastomer composite provided by the present application is shown in Table 3.

[0050] Table 3 Performance range of the elastomer composite provided by the present application

[0051] In order to further illustrate the present application, the technical solutions provided by the present application are described in detail below in conjunction with examples, but they should not be understood as limiting the scope of protection of the present application.

[0052] Example 1 The present example provides an elastomer composite, and the formula of the elastomer composite is shown in Table 4.

[0053] Table 4 Formula table of the elastomer composite provided by Examples 1-2

[0054] The present embodiment 1 provides a method for preparing the rubber compound of the elastomer composite material, specifically comprising the following steps: The small compound test rubber is mixed in an X(S)M1.7L internal mixer, the rotor rotation speed is 45 r / min, and the feeding sequence is as follows: high-end domestic natural rubber, 1,4-polybutadiene polymer → precipitated white carbon black, zinc oxide, antioxidant 4020, antioxidant RD, low rolling resistance modifier RK602L → N660 carbon black, N220 carbon black / N234 carbon black, silane coupling agent KH-845-4, environmentally friendly aromatic oil TDAE, aromatic oil DAE → insoluble sulfur IS-60, anti-reduction agent WK-901 / PK900, accelerator CZ, and anti-scorching agent CTP.

[0055] The large compound in the workshop is subjected to one-stage mixing in an X(S)MF-35 internal mixer, the rotor rotation speed is 40 r / min, and the feeding sequence is as follows: High-end domestic natural rubber, 1,4-polybutadiene polymer → precipitated white carbon black, zinc oxide, antioxidant 4020, low rolling resistance modifier RK602L → modified N660 carbon black, N220 carbon black or N234 carbon black, silane coupling agent KH-845-4, environmentally friendly aromatic oil TDAE → insoluble sulfur IS-60, anti-reduction agent WK-901 or PK900, accelerator NOBS, and anti-scorching agent CTP → unscramble 2-3 times → discharge rubber.

[0056] Embodiment 2 The elastomer composite material provided in the present embodiment 2 is basically the same as that provided in the present embodiment 1, except that the formula of the elastomer composite material provided in the present embodiment 2 is specifically shown in Table 4.

[0057] Comparative Example 1 (ordinary formula) The ordinary formula provided in the present comparative example 1 is basically the same as the elastomer composite material provided in the present embodiment 1, except that the formula of the ordinary formula provided in the present comparative example 1 is specifically shown in Table 5.

[0058] Table 5 Formula of the elastomer composite material provided in the present embodiment and ordinary formula

[0059] Test Example The rubber compounds prepared in the present embodiments 1-2 and the present comparative example 1 are subjected to performance tests, and the test results are shown in Table 6. The tensile strength test is in accordance with GB / T 528-2009, the tear strength test is in accordance with GB / T 529-2008, the thermal conductivity standard is GB / T 11205-2009, and the compression heat generation is GB / T 1687-1993.

[0060] Table 6 Performance comparison table of rubber compound embodiments and comparative examples

[0061] From the data in Table 6, it can be seen that the vulcanized rubber prepared using the formula of the present embodiment 1 has higher tear strength, tensile strength and elongation at break than the ordinary formula rubber of Comparative Example 1, has a decrease in heat build-up performance, and is basically the same in other aspects.

[0062] Embodiment 4 The present embodiment provides a preparation method of an aircraft tire, specifically comprising the following steps: The mixing rubber prepared in Embodiments 1-2 is extruded by an extruder to prepare a shoulder cushion rubber semi-product, which is assembled and formed on a forming machine, combined with other components to prepare a tire blank, and the tire blank is vulcanized by a vulcanizing machine to become an aircraft tire product.

[0063] From the above embodiments, it can be seen that the elastomer composite material provided by the present application uses high-end domestic natural rubber as the main material, forms a raw rubber system with 1,4-polybutadiene polymer, and adds general carbon black, medium-super wear-resistant carbon black, sulfur, environmentally friendly aromatic oil, heat stabilizer, accelerator, low rolling resistance modifier RK602L, anti-vulcanization reversion agent, antioxidant and other auxiliary materials, and is prepared into a formula according to a certain mass ratio, which has excellent tear resistance and low heat build-up performance. The present application is used in large aircraft tires, and the tire will not have quality problems such as shoulder emptying, shoulder cracking and delamination in the shoulder part under the use conditions of large load and low air pressure, thereby ensuring the safety of the tire in use.

[0064] Although the above embodiments have made a detailed description of the present application, it is only a part of the embodiments of the present application, not all the embodiments, and other embodiments can be obtained under the premise of no creativity according to the present embodiments, which all belong to the protection scope of the present application.

Claims

1. An elastomeric composite, characterized by, The components include the following mass fractions: high-end natural rubber 85~100 parts, 1,4-polybutadiene polymer 0~15 parts and not 0, zinc oxide 6~12 parts, stearic acid 2~5 parts, carbon black 25~45 parts, white carbon black 5~15 parts, silane coupling agent 1.1~1.9 parts, aromatic oil 3~10 parts, antioxidant 1.7~5.2 parts, low rolling resistance modifier 0.4~1 part, insoluble sulfur 1.3~1.9 parts, sulfenamide accelerator 0.2~1.2 parts, anti-reversion agent 0.3~1.5 parts, anti-scorching agent 0.1~0.6 parts; The parameters of the high-end natural rubber include: tensile strength ≥25 MPa, elongation at break ≥810%, tear strength ≥30 kN / m, and compression fatigue temperature rise ≤10℃; The carbon black includes N660 carbon black, and the carbon black further includes N220 carbon black and / or N234 carbon black; The antioxidant includes p-phenylenediamine antioxidant 4020 and ketone amine antioxidant RD.

2. The elastomeric composite of claim 1, wherein, In the elastomer composite, the mass fraction of N660 carbon black is 20~35 parts, and the mass fraction of N220 carbon black and / or N234 carbon black is 5~15 parts.

3. The elastomeric composite of claim 1, wherein, In the elastomer composite, the mass fraction of p-phenylenediamine antioxidant 4020 is 1.1~4 parts, and the mass fraction of ketone amine antioxidant RD is 0.6~1.2 parts.

4. The elastomeric composite of claim 1, wherein, The content of cis-structure polymer in the 1,4-polybutadiene polymer is ≥95wt%, the zinc oxide is indirect zinc oxide, and the white carbon black is precipitated white carbon black.

5. The elastomeric composite of claim 1, wherein, The silane coupling agent is silane coupling agent KH-845-4, the aromatic oil includes aromatic oil TDAE and / or aromatic oil DAE, and the low rolling resistance modifier is low rolling resistance modifier RK602L.

6. The elastomeric composite of claim 1, wherein, The insoluble sulfur is insoluble sulfur IS-60, the sulfenamide accelerator includes one or more of accelerators CZ, NS and DZ, the anti-reversion agent is anti-reversion agent WK-901 and / or anti-reversion agent PK900, and the anti-scorching agent is anti-scorching agent CTP.

7. The elastomer composite according to any one of claims 1~6 is applied in a tire shoulder cushion pad.

8. A tire characterized by The tire includes a shoulder cushion pad, and the shoulder cushion pad is obtained by using the elastomer composite according to any one of claims 1~6.

9. Tyre according to Claim 8, characterized in that, The tire is an aircraft tire.

10. Process for the production of tyres as claimed in claim 8 or 9, characterized in that, The method includes the following steps: mixing the components of the elastomer composite to obtain a mixed rubber; extruding the mixed rubber to obtain a shoulder cushion pad semi-product; combining the shoulder cushion pad semi-product with other components of the tire to form a tire blank; performing vulcanization treatment on the tire blank to obtain the tire.

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