A rubber composition and a rubber product

Abstract

The present application relates to the technical field of rubber, in particular to a rubber composition and a rubber product.The present application provides a rubber composition, which comprises the following components in parts by mass: 100 parts of rubber, 40-120 parts of filler, 0.1-50 parts of rubber processing oil and 0.1-15 parts of vulcanizing agent; wherein the rubber processing oil comprises modified bio-based oil, the modified bio-based oil has the following structure: wherein R1 and R2 are selected from the residues after the reaction of the unsaturated carbon-carbon double bond of bio-based oil; x is an integer between 2 and 6.The rubber composition of the present application improves the crosslinking density and mechanical properties of rubber by adding modified bio-based oil, which is beneficial to improve the operation performance of rubber compound; and the modified bio-based oil contains a polysulfide bond, which can participate in the vulcanization reaction during the vulcanization process of rubber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber, in particular to a rubber composition and a rubber product. BACKGROUND

[0002] Plasticizers can reduce the viscosity of rubber, improve the processing performance and filler dispersibility, and enhance the elasticity, so plasticizers are an important component indispensable in the rubber industry. The plasticizers used in the tire industry are generally petroleum-based plasticizers, such as naphthenic oil, environmentally friendly aromatic oil, and aromatic oil (DAE). The aromatic oil contains a large amount of carcinogenic polycyclic aromatic hydrocarbons, and the release of these aromatic oils during the production, use, and recycling of tires can cause great harm to human health and serious pollution to the environment. At the same time, considering the scarcity of global oil resources and the risk of oil depletion, it is imperative to find an environmentally friendly, renewable, and harmless plasticizer for the tread rubber.

[0003] Bio-based oil is a base oil obtained by biological transformation or chemical reaction from plant oil or animal oil as raw material; it has a wide source and is mainly derived from renewable resources, such as commonly used soybean oil, rapeseed oil, cottonseed oil, peanut oil, cashew oil, etc. Bio-based oil is considered a substitute for petroleum-based plasticizers, but most bio-based oils contain a large amount of unsaturated double bonds, which increases their activity, and in the rubber processing process, they can participate in the crosslinking vulcanization reaction of rubber, thereby affecting the mechanical properties of rubber.

[0004] In view of this, the present application is proposed. SUMMARY

[0005] The first object of the present application is to provide a rubber composition, which reduces the influence of unsaturated carbon-carbon double bonds on the rubber vulcanization process by adding modified bio-based oil, improves the crosslinking density and mechanical properties of rubber; the modified bio-based oil has a low kinematic viscosity, which is beneficial to improve the operation performance of rubber compounds; the modified bio-based oil contains a polysulfide bond, which can participate in the vulcanization reaction during the rubber vulcanization process, thereby improving the dynamic performance of the rubber compound.

[0006] The second object of the present application is to provide a rubber product.

[0007] In order to achieve the above-mentioned objects of the present application, the following technical solutions are adopted:

[0008] In the first aspect, the present application provides a rubber composition, which comprises the following components in parts by mass:

[0009] 100 parts of rubber, 40-120 parts of filler, 0.1-50 parts of rubber processing oil, and 0.1-15 parts of vulcanizing agent;

[0010] The rubber processing oil comprises modified bio-based oil, and the modified bio-based oil has the following structure:

[0011] In the formula, R1 and R2 are selected from residues after reaction of unsaturated carbon-carbon double bonds of the bio-based oil; x is an integer between 2 and 6.

[0012] Further, the method for preparing the modified bio-based oil comprises the following steps:

[0013] reacting the bio-based oil and the bisulfur dichloride to obtain a reaction liquid; adding a polysulfide solution to the reaction liquid, stirring and performing layer separation to obtain the modified bio-based oil.

[0014] Further, the bio-based oil comprises at least one of vegetable oil and / or animal oil.

[0015] The vegetable oil comprises at least one of castor oil, peanut oil, sunflower seed oil, rapeseed oil, soybean oil, corn oil, rice bran oil, cottonseed oil, shea oil, palm oil, flaxseed oil, dewaxed corn oil, camellia oil and macadamia nut oil.

[0016] The animal oil comprises at least one of lard oil, fish oil, beef tallow and mutton tallow.

[0017] Further, the rubber operating oil further comprises petroleum-based oil.

[0018] And / or, the mass ratio of the modified bio-based oil and the petroleum-based oil is 5:95-95:5.

[0019] Further, the rubber operating oil further comprises a compatibilizer.

[0020] And / or, the mass of the compatibilizer is 0.1%-15% of the total mass of the modified bio-based oil and the petroleum-based oil.

[0021] Further, the rubber comprises at least one of natural rubber, isoprene rubber, polybutadiene rubber, styrene-butadiene rubber, cis-butadiene rubber, chloroprene rubber, nitrile rubber, ethylene-propylene rubber, silicone rubber, fluororubber and acrylate rubber.

[0022] Further, the filler comprises at least one of carbon black, siliceous filler and aluminous filler.

[0023] Further, the vulcanizing agent comprises sulfur.

[0024] Further, the rubber composition further comprises at least one of vulcanization accelerator, vulcanization activator, antioxidant, softener, protective wax, tackifier, adhesion enhancer, coupling agent, rubber dispersant, scorch retarder and operation aid.

[0025] In a second aspect, the present application further provides a rubber product prepared by using the rubber composition as described above.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] The rubber composition of the present application, by adding the modified bio-based oil with a specific structure, the content of unsaturated carbon-carbon double bonds in the modified bio-based oil is low, which reduces the influence of unsaturated carbon-carbon double bonds on the rubber vulcanization process, helps to improve the crosslinking density and mechanical properties of the rubber; the modified bio-based oil has a lower kinematic viscosity, which can make the mixing of each component of the rubber compound more uniform, and improve the operation performance; the modified bio-based oil contains a polysulfide bond, which can participate in the vulcanization reaction during the rubber vulcanization process, which is beneficial to improve the dynamic performance of the rubber compound. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described below in detail with specific embodiments, but those skilled in the art will understand that the following described embodiments are part of the embodiments of the present application, not all the embodiments, and are only used to illustrate the present application, and should not be regarded as limiting the scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The specific conditions are not specified in the examples, which are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not specified by the manufacturer, which are conventional products that can be purchased on the market.

[0029] The rubber composition and rubber product of the present application will be described in detail below.

[0030] In some embodiments of the present application, a rubber composition is provided, which comprises the following components in mass parts:

[0031] 100 parts of rubber, 40-120 parts of filler, 0.1-50 parts of rubber processing oil and 0.1-15 parts of vulcanizing agent;

[0032] The rubber processing oil comprises a modified bio-based oil, and the modified bio-based oil has the following structure:

[0033] In the formula, R1 and R2 are selected from the residues after the reaction of the unsaturated carbon-carbon double bonds of the bio-based oil; x is an integer between 2 and 6.

[0034] The rubber composition of the present application, by adding the modified bio-based oil, improves the crosslinking density and mechanical properties of the rubber; makes the mixing of each component of the rubber more uniform, improves the operation performance; and can participate in the vulcanization reaction of the rubber, which is beneficial to improve the performance of the rubber.

[0035] In the modified bio-based oil, the content of unsaturated carbon-carbon double bonds is low, which reduces the influence of carbon-carbon double bonds on the vulcanization process of rubber, and improves the crosslinking density and mechanical properties of rubber.

[0036] The modified bio-based oil has a lower kinematic viscosity, which makes the mixing of components of rubber compounds more uniform and improves the operation performance.

[0037] The modified bio-based oil contains a polysulfide bond, which can participate in the vulcanization reaction during the vulcanization process of rubber, which is beneficial to improve the dynamic performance of rubber compounds.

[0038] The modified bio-based oil is a renewable resource derived from biology, which is more environmentally friendly than petroleum-based oil.

[0039] In different embodiments of the present application, the mass fraction of each component of the rubber composition can be as follows, respectively:

[0040] The mass fraction of rubber is 100 parts;

[0041] The mass fraction of the filler can be 40 parts, 60 parts, 80 parts, 100 parts, 120 parts, or a range value composed of any two of them; preferably 50-100 parts; more preferably 50-80 parts;

[0042] The mass fraction of the rubber processing oil can be 0.1 parts, 1 parts, 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, or a range value composed of any two of them;

[0043] The mass fraction of the vulcanizing agent can be 0.1 parts, 1 parts, 5 parts, 10 parts, 15 parts, or a range value composed of any two of them.

[0044] In some embodiments of the present application, R1 and R2 are each independently selected from any one of C12-C22 saturated or unsaturated linear or branched groups.

[0045] In some embodiments of the present application, the preparation method of the modified bio-based oil comprises the following steps:

[0046] The bio-based oil and dichloride disulfide (S2Cl2) are reacted to obtain a reaction liquid; a polysulfide solution is added to the reaction liquid, stirred and layered to obtain a modified bio-based oil.

[0047] In some embodiments of the present application, the bio-based oil includes vegetable oil and / or animal oil.

[0048] In some embodiments of the present application, the vegetable oil includes at least one of castor oil, peanut oil, sunflower oil, rapeseed oil, soybean oil, corn oil, rice bran oil, cottonseed oil, shea nut oil, palm oil, linseed oil, dewaxed corn oil, camellia oil, and macadamia nut oil; the sunflower oil includes high oleic sunflower oil; and the rapeseed oil includes high oleic rapeseed oil.

[0049] Castor oil is a vegetable oil extracted from castor seeds, and the composition of castor oil includes 80% to 85% of ricinoleic acid, 7% of oleic acid, 3% of linoleic acid, 2% of palmitic acid, and 1% of stearic acid, etc.

[0050] Cottonseed oil is oil pressed from cotton seeds, and contains 13 kinds of fatty acids, mainly linoleic acid (51.99% to 60.88%), palmitic acid (18.30% to 25.68%), and oleic acid (12.28% to 18.50%), in which unsaturated fatty acids account for 73.62%, and the main unsaturated fatty acids are linoleic acid and linolenic acid, accounting for 57.44%.

[0051] Linseed oil is obtained from linseed, and mainly contains oleic acid (20% to 35%), linoleic acid (15% to 25%), and linolenic acid (35% to 53%).

[0052] Peanut oil contains palmitic acid, stearic acid, arachidic acid, behenic acid, wood tar acid, oleic acid, linoleic acid, etc., in which palmitic acid is about 13%, stearic acid is 3% to 5%, wood tar acid is 6% to 8%, oleic acid is 37%, and linoleic acid is 38%.

[0053] Corn oil is extracted from corn germ, and the content of unsaturated fatty acids in corn oil is as high as 80% to 85%.

[0054] Rice bran oil is obtained from rice bran waste left over from rice processing by pressing or leaching, and mainly contains 40% to 52% of oleic acid, 29% to 42% of linoleic acid, and 12% to 18% of palmitic acid.

[0055] Olive oil is directly cold-pressed from fresh olive fruits, and the six most important fatty acids in olive oil are oleic acid, linoleic acid, linolenic acid, palmitoleic acid, palmitic acid, and stearic acid, in which the content of oleic acid is the highest.

[0056] Camellia oil is obtained from the seeds of Camellia oleifera, and the content of unsaturated fatty acids is as high as 90% or more, the content of oleic acid is 80% to 83%, and the content of linoleic acid is 7% to 13%.

[0057] Macadamia nut oil is edible oil obtained from macadamia nuts by different methods.

[0058] In some embodiments of the present application, the animal oil comprises at least one of pig oil, fish oil, beef tallow and mutton tallow.

[0059] In some embodiments of the present application, the polysulfide comprises potassium polysulfide and / or sodium polysulfide; preferably, the sodium polysulfide, the chemical formula of which is Na2S x , x is 2-6, for example, it can be Na2S6.

[0060] In some embodiments of the present application, the ratio of the amount of the bio-based oil to the amount of the disulfide dichloride is 100g:0.1-5mol; typically but not limitedly, for example, the ratio of the amount of the bio-based oil to the amount of the disulfide dichloride can be 100g:0.1mol, 100g:1mol, 100g:2mol, 100g:3mol, 100g:4mol, 100g:5mol or a range value composed of any two of them.

[0061] In some embodiments of the present application, the mass ratio of the polysulfide in the polysulfide solution to the bio-based oil is 1:(0.5-1); typically but not limitedly, for example, the ratio of the amount of the sodium polysulfide in the sodium polysulfide solution to the bio-based oil is 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1 or a range value composed of any two of them; preferably, the polysulfide solution is an aqueous solution of the polysulfide.

[0062] In some embodiments of the present application, the reaction comprises: reacting at 30-60℃ for 1-5h; typically but not limitedly, for example, the temperature of the reaction is 30℃, 40℃, 50℃, 60℃ or a range value composed of any two of them; the time of the reaction is 1h, 2h, 3h, 4h, 5h or a range value composed of any two of them.

[0063] In some embodiments of the present application, stirring and layering are carried out at 30-60℃.

[0064] In some embodiments of the present application, the method for preparing the modified bio-based oil specifically comprises the following steps:

[0065] The bio-based oil and the disulfide dichloride are reacted to obtain a reaction liquid; an aqueous solution of sodium polysulfide is added to the reaction liquid, stirring and layering are carried out, after the water layer is separated, iron powder is added for reduction to remove free sulfur in the system, and the modified bio-based oil is obtained.

[0066] In some embodiments of the present application, the rubber process oil further comprises a petroleum-based oil; preferably, the petroleum-based oil comprises RAE oil.

[0067] In some embodiments of the present application, the mass ratio of the modified bio-based oil and the petroleum-based oil is 5:95-95:5; typically but not exclusively, for example, the mass ratio of the modified bio-based oil and the petroleum-based oil can be 5:95, 20:80, 40:60, 50:50, 60:40, 80:20, 95:5, or a range value composed of any two of them; preferably 20:80-80:20; more preferably 40:60-60:40.

[0068] The rubber process oil of the present application is a modified bio-based oil; alternatively, the rubber process oil is a mixed oil containing a modified bio-based oil and a petroleum-based oil.

[0069] In some embodiments of the present application, when the rubber process oil is a modified bio-based oil, the rubber composition comprises the following components by mass fraction:

[0070] Rubber 100 parts, filler 50-80 parts, modified bio-based oil 0.1-50 parts, and vulcanizing agent 0.1-15 parts; preferably, modified bio-based oil 1-40 parts; more preferably, modified bio-based oil 5-25 parts.

[0071] In some embodiments of the present application, when the rubber process oil is a mixed oil, the rubber composition comprises the following components by mass fraction:

[0072] Rubber 100 parts, filler 50-80 parts, modified bio-based oil 0.1-10 parts, petroleum-based oil 0.1-10 parts, and vulcanizing agent 0.1-15 parts.

[0073] In some embodiments of the present application, when the rubber process oil is a mixed oil, the rubber process oil further comprises a compatibilizer. Mixing the modified bio-based oil and the petroleum-based oil by adding a compatibilizer can improve the uniformity and stability of the mixed oil.

[0074] In some embodiments of the present application, the mass of the compatibilizer is 0.1%-15% of the total mass of the modified bio-based oil and the petroleum-based oil; typically but not exclusively, for example, the mass of the compatibilizer is 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 15%, or a range value composed of any two of them of the total mass of the modified bio-based oil and the petroleum-based oil; preferably 3%-12%; more preferably 5%-10%.

[0075] In some embodiments of the present application, the compatibilizer comprises polyamide wax and / or a surfactant; preferably, the surfactant comprises at least one of vegetable oil-based surfactants and / or amphiphilic surfactants; preferably, the surfactant comprises at least one of petroleum sulfates, sodium dodecyl sulfate, polyethylene glycol octyl ether, polysorbate, methyl ester sulfonate surfactant, polysorbate, and cocamidopropyl betaine.

[0076] In some embodiments of the present application, when the rubber process oil is a mixed oil, the method for preparing the rubber process oil comprises:

[0077] adding one of the bio-based oil and the petroleum-based oil into a container with stirring device, slowly heating to 50-150℃; then gradually adding the compatibilizer, mixing can be assisted by stirrer or ultrasonic cleaner, to obtain an oil sample containing the compatibilizer;

[0078] gradually adding the other oil into the oil sample containing the compatibilizer, while stirring, until the oil sample is uniformly mixed and not stratified, to obtain the mixed oil.

[0079] Preferably, the mixing temperature is 50-150℃; preferably 60-120℃; more preferably 80-100℃.

[0080] Preferably, the stirring mode can be magnetic stirrer, mechanical stirrer or ultrasonic stirrer, and the stirring intensity or speed is adjusted according to the mixing condition.

[0081] The petroleum-based oil with high melting point is inconvenient to operate in the process of rubber composition processing. In the present application, when the mixed oil is used in the rubber composition, the bio-based oil with low melting point is mixed with the petroleum-based oil with high melting point, and the prepared mixed oil has a suitable melting point and is more convenient to use.

[0082] In some embodiments of the present application, the rubber includes at least one of natural rubber (NR), isoprene rubber, polybutadiene rubber, styrene butadiene rubber, cis-butadiene rubber, chloroprene rubber, nitrile rubber, ethylene propylene rubber, silicone rubber, fluororubber and acrylate rubber.

[0083] In some embodiments of the present application, the filler includes at least one of carbon black, siliceous filler and aluminous filler.

[0084] The carbon black can be any carbon black that can be used in the field of rubber, for example: white carbon black, reinforcing carbon black of ASTM grade 100, 200, 300 series (for example: N115, N234, N330, N375), or carbon black of higher series of ASTM grade (for example: N660, N772).

[0085] The siliceous filler includes silicon dioxide (SiO2); the silicon dioxide includes at least one of wet-process silicon dioxide and dry-process silicon dioxide; preferably, the specific surface area of the silicon dioxide is less than 450m 2 / g, more preferably, the specific surface area of the silicon dioxide is 50-400m 2 / g, for example, Ultrasil7000 silicon dioxide produced by Degussa.

[0086] The aluminum filler includes aluminum oxide (Al3O2).

[0087] In some embodiments of the present application, the vulcanizing agent includes sulfur.

[0088] In some embodiments of the present application, the rubber composition further includes at least one of a vulcanization accelerator, a vulcanization activator, an antioxidant, a softener, a protective wax, an adhesion enhancer, a coupling agent, a rubber dispersant, a scorch retarder, and an operation aid.

[0089] In some embodiments of the present application, the vulcanization accelerator includes at least one of accelerator DM, accelerator CZ, accelerator DZ, accelerator NS, accelerator DPG, and accelerator TMTD.

[0090] In some embodiments of the present application, the vulcanization activator includes zinc oxide and / or zinc stearate.

[0091] In some embodiments of the present application, the softener includes aromatic oil.

[0092] The present application does not strictly limit the types and amounts of the various aids, and conventional types and amounts or adjustments according to actual requirements can be used.

[0093] In some embodiments of the present application, a method for preparing a rubber composition is also provided, including the following steps:

[0094] The raw materials except for the vulcanizing agent, the vulcanization accelerator, and the vulcanization activator are added to a banbury mixer, and are mixed at 140-160°C to obtain a masterbatch; after the masterbatch is cooled to below 90°C, the masterbatch, the vulcanizing agent, the vulcanization activator, and the vulcanization accelerator are added to an open mill, and are mixed at 30-100°C to obtain the rubber composition.

[0095] In some embodiments of the present application, a rubber product is also provided, which is prepared using the rubber composition described above.

[0096] In some embodiments of the present application, the rubber product includes a rubber semi-finished product or a rubber finished product; preferably, the rubber product includes a tire semi-finished product or a tire finished product.

[0097] Examples and Comparative Examples

[0098] The performance parameters of each bio-based oil are shown in Table 1.

[0099] Table 1

[0100]

[0101] A method for preparing a modified bio-based oil includes the following steps:

[0102] In a reactor equipped with stirring device, thermometer and distillation device, bio-based oil was added, and dichloride disulfide (S2Cl2) was added dropwise, and reacted at a temperature of 30-60℃ for 1-5h; then sodium polysulfide aqueous solution was added to the reactor, stirred and layered, and iron powder was added for reduction to remove free sulfur in the system, to obtain modified bio-based oil A1, A2 and A3, respectively.

[0103] In the preparation method of the modified bio-based oil, the types and amounts of the raw materials are shown in Table 2.

[0104] Table 2

[0105]

[0106] The preparation method of the rubber composition comprises the following steps:

[0107] The raw materials except for vulcanizing agent, vulcanization accelerator and vulcanization activator were added to the internal mixer, and the internal mixing was carried out at 140-160℃ to obtain the masterbatch; after the masterbatch was cooled to below 90℃, the masterbatch, vulcanizing agent, vulcanization accelerator and vulcanization activator were added to the open mill, and the mixing was carried out at 30-100℃ to obtain the rubber composition.

[0108] The raw materials and their amounts (mass parts) of the rubber composition of the examples and comparative examples are shown in Table 3.

[0109] Among them, the modified soybean oil is modified bio-based oil A1, the modified rice bran oil is modified bio-based oil A2, and the modified dewaxed corn oil is modified bio-based oil A3.

[0110] The preparation method of the mixed oil is as follows: the modified bio-based oil is added to a container with stirring device, and slowly heated to 70-90℃; then polyamide wax is gradually added and mixed to obtain an oil sample containing compatibilizer;

[0111] The RAE oil is gradually added to the oil sample containing compatibilizer while stirring until the oil sample is uniformly mixed and not layered to obtain the mixed oil.

[0112] Table 3

[0113]

[0114]

[0115] Test Example

[0116] The properties of the modified bio-based oils A1, A2 and A3 were tested, and the results are shown in Table 4.

[0117] Table 4

[0118] Modified bio-based oil Kinematic viscosity (mpa.s) Sulfur content (wt%) A1 57 23.1 A2 60 21.2 A3 65 19.8

[0119] The properties of the rubber compositions prepared in Examples 1-6 and Comparative Example 1 were tested, and the results are shown in Table 5.

[0120] After the rubber compositions were vulcanized, the following property tests were performed, wherein the vulcanization method was vulcanization of the rubber compositions at 150°C for 30 min.

[0121] Tensile property test: The tensile strength and elongation at break of the vulcanized rubber compositions were tested according to standard GB / T528-2009. The tensile strength is the tensile stress recorded at the time of rupture of the tensile sample, with units of MPa. The elongation at break is the elongation of the sample at the time of rupture, with units of %.

[0122] Shore hardness test: The Shore hardness of the vulcanized rubber compositions was evaluated according to standard GB / T531.1-2008; the greater the hardness value, the higher the rigidity of the rubber composition.

[0123] Dynamic mechanical property: The dynamic properties of the vulcanized rubber compositions were tested according to standard GB / T13937-1992; the detection frequency was 11 Hz, the detection displacement was 15 um, and the dynamic properties of the rubber were characterized using 60°C tan δ; the smaller the value, the smaller the rubber hysteresis loss and the lower the dynamic heat generation.

[0124] Table 5

[0125]

[0126]

[0127] As can be seen from Table 5, in Examples 1-3, the modulus and tensile strength of Example 2 were the highest, but the modulus was 8% lower than that of Comparative Example 1; in Examples 4-6, the modulus and tensile strength of Example 4 were the best, and the properties were consistent with those of Comparative Example 1. The dynamic properties of the rubber were characterized using 60°C tan δ, and the dynamic properties of Example 4 were close to those of Comparative Example 1. The modified rice bran oil was slightly lower than the petroleum-based oil in terms of rubber properties, and after compounding with a certain proportion of petroleum-based oil, the mechanical properties and dynamic properties of the rubber could be consistent with those of the petroleum-based oil.

[0128] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rubber composition characterized in that, According to the mass fraction, the following components are included: Rubber 100 parts, filler 40-120 parts, rubber operating oil 0.1-50 parts and vulcanizing agent 0.1-15 parts; The rubber operating oil includes modified bio-based oil, and the modified bio-based oil has the following structure: wherein R1and R2are selected from the residues after reaction of the unsaturated carbon-carbon double bonds of the bio-based oil; and x is an integer between 2 and 6.

2. The rubber composition according to claim 1, characterized in that, The preparation method of the modified bio-based oil includes the following steps: The bio-based oil and dichloride bisulfur are reacted to obtain a reaction liquid; a polysulfide solution is added to the reaction liquid, stirred and layered to obtain the modified bio-based oil.

3. The rubber composition according to claim 2, characterized in that, The bio-based oil includes plant oil and / or animal oil; The plant oil includes at least one of castor oil, peanut oil, sunflower oil, rapeseed oil, soybean oil, corn oil, rice bran oil, cottonseed oil, shea oil, palm oil, flaxseed oil, dewaxed corn oil, camellia oil and Australian nut oil. The animal oil includes at least one of lard, fish oil, beef tallow and mutton oil.

4. The rubber composition according to claim 1, characterized in that, The rubber operating oil also includes petroleum-based oil; And / or, the mass ratio of the modified bio-based oil and the petroleum-based oil is 5:95-95:

5.

5. The rubber composition according to claim 4, characterized in that, The rubber operating oil also includes a compatibilizer; And / or, the mass of the compatibilizer is 0.1%-15% of the total mass of the modified bio-based oil and the petroleum-based oil.

6. The rubber composition according to claim 1, characterized in that, The rubber includes at least one of natural rubber, isoprene rubber, polybutadiene rubber, styrene-butadiene rubber, cis-butadiene rubber, chlorobutadiene rubber, nitrile rubber, ethylene-propylene rubber, silicone rubber, fluorine rubber and acrylate rubber.

7. The rubber composition according to claim 1, characterized in that, The filler includes at least one of carbon black, siliceous filler and aluminous filler.

8. The rubber composition according to claim 1, characterized in that, The vulcanizing agent includes sulfur.

9. The rubber composition according to claim 1, characterized in that, The rubber composition also includes at least one of vulcanization accelerator, vulcanization activator, antioxidant, softener, protective wax, tackifier, adhesion enhancer, coupling agent, rubber dispersant, scorch retardant and operation aid.

10. A rubber article characterized in that, The rubber composition is prepared by using any one of claims 1-9.

Images