Wear-resistant new-energy wide-body tire tread rubber material and preparation method thereof

Abstract

The invention discloses a wear-resistant new-energy wide-body tire tread rubber material and a preparation method thereof, and relates to the technical field of tread rubber materials. The rubber material is prepared from the following raw materials in parts by weight: 45 to 65 parts of natural rubber, 10 to 15 parts of high vinyl polybutadiene rubber, 25 to 40 parts of butadiene styrene rubber, 35 to 70 parts of precipitated white carbon black, 7 to 9 parts of aluminate coupling agent, 5 to 10 parts of carbon black N295, 3 to 7 parts of zinc oxide, 2.5 to 5 parts of stearic acid, 5 to 8 parts of anti-aging agent 6PPD, 1 to 2.5 parts of accelerant CBS and 1 to 2 parts of sulfur. The tread rubber has the characteristics of good wear resistance, wet skid resistance, low rolling resistance, aging resistance and the like, and is suitable for being used as a tread rubber material of a wide-body tire of a new energy automobile.

Description

Technical Field

[0001] The present invention relates to the technical field of tread rubber materials, and in particular to a wear-resistant new energy wide-body tire tread rubber material and a preparation method thereof. Background Art

[0002] Tread rubber refers to the outermost layer of the tire that contacts the road surface and has a pattern printed on the surface. It can give the tire traction, cushion the impact and swing during driving, and prevent the cord layer from being cut and punctured. It is required to have high wear resistance, fatigue resistance, good aging resistance, high tensile strength, elasticity and toughness, and low heat generation during driving. It can be made of raw rubber such as natural rubber, styrene-butadiene rubber, cis-isoprene rubber and cis-butadiene rubber. A large amount of carbon black is often added to the rubber to improve its physical and mechanical properties. The rubber can be extruded by a screw extruder or calendered by a calender and cooled.

[0003] In the prior art, the wear resistance, wet skid resistance, low rolling resistance and aging resistance of the tread rubber of new energy vehicle wide-body tires are relatively poor. To this end, we propose a wear-resistant new energy wide-body tire tread rubber and a preparation method thereof to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a wear-resistant new energy wide-body tire tread rubber material and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a wear-resistant new energy wide-body tire tread rubber material, wherein the raw materials include, by weight: 45-65 parts of natural rubber, 10-15 parts of high vinyl polybutadiene rubber, 25-40 parts of styrene-butadiene rubber, 35-70 parts of precipitated silica, 7-9 parts of aluminate coupling agent, 5-10 parts of carbon black N299, 3-7 parts of zinc oxide, 2.5-5 parts of stearic acid, 5-8 parts of antioxidant 6PPD, 1-2.5 parts of accelerator CBS, and 1-2 parts of sulfur.

[0006] Furthermore, the raw materials include, by weight: 45 parts of natural rubber, 15 parts of high vinyl polybutadiene rubber, 40 parts of styrene-butadiene rubber, 40 parts of precipitated silica, 7 parts of aluminate coupling agent, 6 parts of carbon black N299, 3 parts of zinc oxide, 5 parts of stearic acid, 8 parts of antioxidant 6PPD, 2.5 parts of accelerator CBS, and 2 parts of sulfur.

[0007] Furthermore, the raw materials include, by weight: 55 parts of natural rubber, 15 parts of high vinyl polybutadiene rubber, 30 parts of styrene-butadiene rubber, 50 parts of precipitated silica, 7 parts of aluminate coupling agent, 5 parts of carbon black N299, 5 parts of zinc oxide, 5 parts of stearic acid, 6 parts of antioxidant 6PPD, 2 parts of accelerator CBS, and 2 parts of sulfur.

[0008] Furthermore, the raw materials include, by weight: 65 parts of natural rubber, 10 parts of high vinyl polybutadiene rubber, 25 parts of styrene-butadiene rubber, 70 parts of precipitated silica, 9 parts of aluminate coupling agent, 10 parts of carbon black N299, 7 parts of zinc oxide, 2.5 parts of stearic acid, 5 parts of antioxidant 6PPD, 1 part of accelerator CBS, and 1 part of sulfur.

[0009] Furthermore, the raw materials include, by weight: 60 parts of natural rubber, 10 parts of high vinyl polybutadiene rubber, 30 parts of styrene-butadiene rubber, 35 parts of precipitated silica, 8 parts of aluminate coupling agent, 8 parts of carbon black N299, 4 parts of zinc oxide, 3 parts of stearic acid, 5 parts of antioxidant 6PPD, 1.5 parts of accelerator CBS, and 2 parts of sulfur.

[0010] Furthermore, the total amount of the natural rubber, high vinyl polybutadiene rubber and styrene butadiene rubber is 100 parts, and the high vinyl polybutadiene rubber is a polybutadiene rubber with a 1,2-vinyl mass fraction greater than 0.7.

[0011] Furthermore, the styrene butadiene rubber is selected from general-purpose contaminated soft styrene butadiene rubber of model ESBR-SBR1500 or soft styrene butadiene rubber filled with high aromatic hydrocarbon oil of model ESBR-SBR1712.

[0012] Furthermore, the aluminate coupling agent model is aluminate coupling agent SG-Al821, the antioxidant 6PPD is N-isopropyl-N'-phenyl-p-phenylenediamine, and the accelerator CBS is N-cyclohexyl-2-benzothiazole sulfonamide.

[0013] A method for preparing a wear-resistant new energy wide-body tire tread rubber material specifically comprises the following steps:

[0014] S1, the first stage of mixing, natural rubber, high vinyl polybutadiene rubber, styrene butadiene rubber, precipitated silica are put into an internal mixer, at 45-55 RPM, mixed for 45-60 seconds, then aluminate coupling agent, carbon black N299, zinc oxide, stearic acid are added, mixed to 135-155°C, and the sheets are discharged after the natural cooling temperature is lower than 120°C;

[0015] S2, the second mixing stage, adding aluminate coupling agent, carbon black N299, zinc oxide, stearic acid, antioxidant 6PPD, accelerator CBS, and sulfur to the materials mixed in the previous stage for a second mixing, using 35-45RPM, mixing for 500-800 seconds, and obtaining the wear-resistant new energy wide-body tire tread rubber material after mixing.

[0016] Furthermore, the parameters of the preparation method of the above-mentioned rubber compound are as follows:

[0017] S1, the first stage of mixing, natural rubber, high vinyl polybutadiene rubber, styrene butadiene rubber, precipitated silica are put into an internal mixer, mixed at 45 RPM for 60 seconds, then aluminate coupling agent, carbon black N299, zinc oxide, stearic acid are added, mixed to 155°C, and the sheets are discharged after the temperature is naturally cooled to 110°C;

[0018] S2, the second mixing stage, adding aluminate coupling agent, carbon black N299, zinc oxide, stearic acid, antioxidant 6PPD, accelerator CBS, and sulfur to the materials mixed in the previous stage for a second mixing, using 45RPM, mixing for 750 seconds, and obtaining the wear-resistant new energy wide-body tire tread rubber material after mixing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] It has good wear resistance, anti-skid performance, low rolling resistance and aging resistance, and is suitable for use as tread rubber for wide-body tires of new energy vehicles. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] A wear-resistant new energy wide-body tire tread rubber material, whose raw materials include, by weight: 45-65 parts of natural rubber, 10-15 parts of high vinyl polybutadiene rubber, 25-40 parts of styrene-butadiene rubber, 35-70 parts of precipitated silica, 7-9 parts of aluminate coupling agent, 5-10 parts of carbon black N299, 3-7 parts of zinc oxide, 2.5-5 parts of stearic acid, 5-8 parts of antioxidant 6PPD, 1-2.5 parts of accelerator CBS, and 1-2 parts of sulfur.

[0023] Natural rubber, high vinyl polybutadiene rubber and styrene butadiene rubber are selected and used together to make the rubber have excellent basic physical and mechanical properties; precipitated silica and carbon black N299 are selected and used together to make the rubber have good antioxidant, wear resistance and toughness; aluminate coupling agent is used to enhance the overall physical and mechanical properties and processing properties of the rubber; stearic acid is used to enhance the anti-aging properties of the rubber and reduce rolling resistance; antioxidant 6PPD has excellent antioxidant, ozone resistance and flex crack resistance.

[0024] Example 1

[0025] The raw materials include, by weight: 45 parts of natural rubber, 15 parts of high vinyl polybutadiene rubber, 40 parts of styrene-butadiene rubber, 40 parts of precipitated silica, 7 parts of aluminate coupling agent, 6 parts of carbon black N299, 3 parts of zinc oxide, 5 parts of stearic acid, 8 parts of antioxidant 6PPD, 2.5 parts of accelerator CBS, and 2 parts of sulfur;

[0026] The total amount of natural rubber, high vinyl polybutadiene rubber and styrene butadiene rubber is 100 parts, the main component of natural rubber (NR) is cis-isoprene polymer, high vinyl polybutadiene rubber is polybutadiene rubber with a 1,2-vinyl mass fraction greater than 0.7, styrene butadiene rubber is selected from ESBR-SBR1500 general-purpose contaminated soft styrene butadiene rubber or ESBR-SBR1712 soft styrene butadiene rubber filled with high aromatic oil, aluminate coupling agent model is aluminate coupling agent SG-Al821, antioxidant 6PPD is N-isopropyl-N'-phenyl-p-phenylenediamine, and accelerator CBS is N-cyclohexyl-2-benzothiazole sulfonamide.

[0027] Example 2

[0028] The raw materials include, by weight: 55 parts of natural rubber, 15 parts of high vinyl polybutadiene rubber, 30 parts of styrene-butadiene rubber, 50 parts of precipitated silica, 7 parts of aluminate coupling agent, 5 parts of carbon black N299, 5 parts of zinc oxide, 5 parts of stearic acid, 6 parts of antioxidant 6PPD, 2 parts of accelerator CBS, and 2 parts of sulfur;

[0029] The total amount of natural rubber, high vinyl polybutadiene rubber and styrene butadiene rubber is 100 parts, the main component of natural rubber (NR) is cis-isoprene polymer, high vinyl polybutadiene rubber is polybutadiene rubber with a 1,2-vinyl mass fraction greater than 0.7, styrene butadiene rubber is selected from ESBR-SBR1500 general-purpose contaminated soft styrene butadiene rubber or ESBR-SBR1712 soft styrene butadiene rubber filled with high aromatic oil, aluminate coupling agent model is aluminate coupling agent SG-Al821, antioxidant 6PPD is N-isopropyl-N'-phenyl-p-phenylenediamine, and accelerator CBS is N-cyclohexyl-2-benzothiazole sulfonamide.

[0030] Example 3

[0031] The raw materials include, by weight: 65 parts of natural rubber, 10 parts of high vinyl polybutadiene rubber, 25 parts of styrene-butadiene rubber, 70 parts of precipitated silica, 9 parts of aluminate coupling agent, 10 parts of carbon black N299, 7 parts of zinc oxide, 2.5 parts of stearic acid, 5 parts of antioxidant 6PPD, 1 part of accelerator CBS, and 1 part of sulfur;

[0032] The total amount of natural rubber, high vinyl polybutadiene rubber and styrene butadiene rubber is 100 parts, the main component of natural rubber (NR) is cis-isoprene polymer, high vinyl polybutadiene rubber is polybutadiene rubber with a 1,2-vinyl mass fraction greater than 0.7, styrene butadiene rubber is selected from ESBR-SBR1500 general-purpose contaminated soft styrene butadiene rubber or ESBR-SBR1712 soft styrene butadiene rubber filled with high aromatic oil, aluminate coupling agent model is aluminate coupling agent SG-Al821, antioxidant 6PPD is N-isopropyl-N'-phenyl-p-phenylenediamine, and accelerator CBS is N-cyclohexyl-2-benzothiazole sulfonamide.

[0033] Example 4

[0034] The raw materials include: 60 parts of natural rubber, 10 parts of high vinyl polybutadiene rubber, 30 parts of styrene butadiene rubber, 35 parts of precipitated white carbon black, 8 parts of aluminate coupling agent, 8 parts of carbon black N299, 4 parts of zinc oxide, 3 parts of stearic acid, 5 parts of antioxidant 6PPD, 1.5 parts of accelerator CBS, 2 parts of sulfur.

[0035] The total amount of natural rubber, high vinyl polybutadiene rubber and styrene butadiene rubber is 100 parts, the main component of natural rubber (NR) is cis-isoprene polymer, high vinyl polybutadiene rubber is polybutadiene rubber with a 1,2-vinyl mass fraction greater than 0.7, styrene butadiene rubber is selected from ESBR-SBR1500 general-purpose contaminated soft styrene butadiene rubber or ESBR-SBR1712 soft styrene butadiene rubber filled with high aromatic oil, aluminate coupling agent model is aluminate coupling agent SG-Al821, antioxidant 6PPD is N-isopropyl-N'-phenyl-p-phenylenediamine, and accelerator CBS is N-cyclohexyl-2-benzothiazole sulfonamide.

[0036] A method for preparing a wear-resistant new energy wide-body tire tread rubber material specifically comprises the following steps:

[0037] S1, the first stage of mixing, natural rubber, high vinyl polybutadiene rubber, styrene butadiene rubber, precipitated silica are put into an internal mixer, at 45-55 RPM, mixed for 45-60 seconds, then aluminate coupling agent, carbon black N299, zinc oxide, stearic acid are added, mixed to 135-155°C, and the sheets are discharged after the natural cooling temperature is lower than 120°C;

[0038] S2, the second mixing stage, adding aluminate coupling agent, carbon black N299, zinc oxide, stearic acid, antioxidant 6PPD, accelerator CBS, and sulfur to the materials mixed in the previous stage for a second mixing, using 35-45RPM, mixing for 500-800 seconds, and obtaining the wear-resistant new energy wide-body tire tread rubber material after mixing.

[0039] The parameters and conditions of the preparation method of the above-mentioned rubber compound are as follows:

[0040] S1, the first stage of mixing, natural rubber, high vinyl polybutadiene rubber, styrene butadiene rubber, precipitated silica are put into an internal mixer, mixed at 45 RPM for 60 seconds, then aluminate coupling agent, carbon black N299, zinc oxide, stearic acid are added, mixed to 155°C, and the sheets are discharged after the temperature is naturally cooled to 110°C;

[0041] S2, the second mixing stage, adding aluminate coupling agent, carbon black N299, zinc oxide, stearic acid, antioxidant 6PPD, accelerator CBS, and sulfur to the materials mixed in the previous stage for a second mixing, using 45RPM, mixing for 750 seconds, and obtaining the wear-resistant new energy vehicle wide-body tire tread rubber material after mixing.

[0042] Table 1 shows the names and proportions of the rubber raw materials

[0043]

[0044]

[0045] Table 2 shows the performance parameters of the rubber materials prepared in Examples 1-4

[0046]

[0047] From Table 2, we can see that the hardness of the rubber is between 64-72 Shore A, the tensile strength is ≥18MPa, the elongation at break is ≥650%, and the Akron abrasion (cm 3 / 1.6km)≤1.2cm 3 / 1.6km, compression fatigue temperature rise ≤12.6℃, compression fatigue permanent deformation ≤8.3%, excellent basic physical and mechanical properties; at the same time, the change rate of tensile strength of the vulcanized rubber after aging (aging conditions: 135℃×168h) is within -18%, and the change rate of elongation at break is within -20%. It can be seen that the wear-resistant new energy wide-body tire tread rubber material of the present invention has good wear resistance, anti-slip properties, low rolling resistance and aging resistance.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant new energy wide-body tire tread rubber material, characterized in that: The raw materials include, by weight: 45-65 parts of natural rubber, 10-15 parts of high vinyl polybutadiene rubber, 25-40 parts of styrene-butadiene rubber, 35-70 parts of precipitated white carbon black, 7-9 parts of aluminate coupling agent, 5-10 parts of carbon black N299, 3-7 parts of zinc oxide, 2.5-5 parts of stearic acid, 5-8 parts of antioxidant 6PPD, 1-2.5 parts of accelerator CBS and 1-2 parts of sulfur.

2. The wear-resistant new energy wide-body tire tread rubber material according to claim 1, characterized in that: The raw materials include, by weight: 45 parts of natural rubber, 15 parts of high vinyl polybutadiene rubber, 40 parts of styrene-butadiene rubber, 40 parts of precipitated silica, 7 parts of aluminate coupling agent, 6 parts of carbon black N299, 3 parts of zinc oxide, 5 parts of stearic acid, 8 parts of antioxidant 6PPD, 2.5 parts of accelerator CBS, and 2 parts of sulfur.

3. The wear-resistant new energy wide-body tire tread rubber material according to claim 1, characterized in that: The raw materials include, by weight: 55 parts of natural rubber, 15 parts of high vinyl polybutadiene rubber, 30 parts of styrene-butadiene rubber, 50 parts of precipitated silica, 7 parts of aluminate coupling agent, 5 parts of carbon black N299, 5 parts of zinc oxide, 5 parts of stearic acid, 6 parts of antioxidant 6PPD, 2 parts of accelerator CBS, and 2 parts of sulfur.

4. The wear-resistant new energy wide-body tire tread rubber material according to claim 1, characterized in that: The raw materials include, by weight: 65 parts of natural rubber, 10 parts of high vinyl polybutadiene rubber, 25 parts of styrene-butadiene rubber, 70 parts of precipitated silica, 9 parts of aluminate coupling agent, 10 parts of carbon black N299, 7 parts of zinc oxide, 2.5 parts of stearic acid, 5 parts of antioxidant 6PPD, 1 part of accelerator CBS, and 1 part of sulfur.

5. The wear-resistant new energy wide-body tire tread rubber material according to claim 1, characterized in that: The raw materials include, by weight: 60 parts of natural rubber, 10 parts of high vinyl polybutadiene rubber, 30 parts of styrene-butadiene rubber, 35 parts of precipitated silica, 8 parts of aluminate coupling agent, 8 parts of carbon black N299, 4 parts of zinc oxide, 3 parts of stearic acid, 5 parts of antioxidant 6PPD, 1.5 parts of accelerator CBS, and 2 parts of sulfur.

6. The wear-resistant new energy wide-body tire tread rubber material according to claims 1-5, characterized in that: The total amount of the natural rubber, high-vinyl polybutadiene rubber and styrene-butadiene rubber is 100 parts, and the high-vinyl polybutadiene rubber is a polybutadiene rubber with a 1,2-vinyl mass fraction greater than 0.

7.

7. The wear-resistant new energy wide-body tire tread rubber material according to claims 1-5, characterized in that: The styrene butadiene rubber is selected from the general-purpose contaminated soft styrene butadiene rubber of model ESBR-SBR1500 or the soft styrene butadiene rubber filled with high aromatic hydrocarbon oil of model ESBR-SBR1712.

8. The wear-resistant new energy wide-body tire tread rubber material according to claims 1-5, characterized in that: The aluminate coupling agent model is aluminate coupling agent SG-Al821, the antioxidant 6PPD is N-isopropyl-N'-phenyl-p-phenylenediamine, and the accelerator CBS is N-cyclohexyl-2-benzothiazole sulfonamide.

9. A method for preparing a wear-resistant new energy wide-body tire tread rubber material based on any one of claims 1 to 5, characterized in that: The specific steps include: S1, the first stage of mixing, natural rubber, high vinyl polybutadiene rubber, styrene butadiene rubber, precipitated silica are put into an internal mixer, at 45-55 RPM, mixed for 45-60 seconds, then aluminate coupling agent, carbon black N299, zinc oxide, stearic acid are added, mixed to 135-155°C, and the sheets are discharged after the natural cooling temperature is lower than 120°C; S2, the second mixing stage, adding aluminate coupling agent, carbon black N299, zinc oxide, stearic acid, antioxidant 6PPD, accelerator CBS, and sulfur to the materials mixed in the previous stage for a second mixing, using 35-45RPM, mixing for 500-800 seconds, and obtaining the wear-resistant new energy wide-body tire tread rubber material after mixing.

10. The method for preparing the wear-resistant new energy wide-body tire tread rubber material according to claim 9, characterized in that: The specific steps include: S1, the first stage of mixing, natural rubber, high vinyl polybutadiene rubber, styrene butadiene rubber, precipitated silica are put into an internal mixer, mixed at 45 RPM for 60 seconds, then aluminate coupling agent, carbon black N299, zinc oxide, stearic acid are added, mixed to 155°C, and the sheets are discharged after the temperature is naturally cooled to 110°C; S2, the second mixing stage, adding aluminate coupling agent, carbon black N299, zinc oxide, stearic acid, antioxidant 6PPD, accelerator CBS, and sulfur to the materials mixed in the previous stage for a second mixing, using 45RPM, mixing for 750 seconds, and obtaining the wear-resistant new energy wide-body tire tread rubber material after mixing.

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