Rubber composition and rubber product

Abstract

The invention relates to the technical field of rubber, in particular to a rubber composition and a rubber product. The rubber composition provided by the invention is prepared from the following components in parts by mass: 100 parts of rubber, 40 to 120 parts of filler, 0.1 to 50 parts of rubber operating oil and 0.1 to 15 parts of vulcanizing agent, wherein the rubber operating oil comprises modified bio-based oil, and the modified bio-based oil has the following structure: in a # imgabs0 # formula, R1 and R2 are selected from residues of the bio-based oil after unsaturated carbon-carbon double bond reaction; and x is an integer between 2 and 6. According to the rubber composition disclosed by the invention, by adding the modified bio-based oil, the crosslinking density and the mechanical property of rubber are improved, and the improvement of the operating performance of a rubber material is facilitated; in addition, the modified bio-based oil contains polysulfide bonds, and can participate in vulcanization reaction in the rubber vulcanization process.

Description

Technical Field

[0001] The present invention relates to the field of rubber technology, in particular to a rubber composition and a rubber product. Background Art

[0002] Plasticizers can reduce rubber viscosity, improve processing performance and filler dispersion, and enhance elasticity, so plasticizers are an indispensable and important component in the rubber industry. Plasticizers used in the tire industry are generally petroleum-based plasticizers, such as cyclohexane oil, environmentally friendly aromatic oil, and aromatic oil (DAE). Aromatic oil contains a large amount of carcinogenic polycyclic aromatic hydrocarbons. During the production, use and recycling of tires, the release of these aromatic oils will cause great harm to human health and cause 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 tread rubber.

[0003] Bio-based oil is a base oil made from vegetable oil or animal oil through biological transformation or chemical reaction; it has a wide range of sources, mainly from renewable resources, such as soybean oil, rapeseed oil, cottonseed oil, peanut oil, cashew oil, etc. Bio-based oil is considered to be a substitute for petroleum-based plasticizers, but most bio-based oils contain a large number of unsaturated double bonds, which increases their activity. During the rubber processing process, they will participate in the cross-linking vulcanization reaction of rubber, thereby affecting the mechanical properties of rubber.

[0004] In view of this, this invention is proposed. Summary of the invention

[0005] The first purpose of the present invention 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, thereby improving the crosslinking density and mechanical properties of the rubber; the modified bio-based oil has a lower kinematic viscosity, which is beneficial to improving the handling performance of the rubber compound; the modified bio-based oil contains polysulfide bonds, which can participate in the vulcanization reaction during the rubber vulcanization process and improve the dynamic properties of the rubber compound.

[0006] A second object of the present invention is to provide a rubber product.

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

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

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

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

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

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

[0013] The bio-based oil and disulfur dichloride are reacted to obtain a reaction liquid; a polysulfide solution is added to the reaction liquid, and the mixture is stirred and separated into layers to obtain the modified bio-based oil.

[0014] Further, the bio-based oil includes plant oil and / or animal oil;

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

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

[0017] Further, the rubber processing oil also includes petroleum-based oil;

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

[0019] Further, the rubber processing oil also includes a compatibilizer;

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

[0021] Furthermore, the rubber includes at least one of natural rubber, isoprene rubber, polybutadiene rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber, nitrile rubber, ethylene-propylene rubber, silicone rubber, fluororubber and acrylic rubber.

[0022] Furthermore, the filler includes at least one of carbon black, siliceous filler and aluminum filler.

[0023] Furthermore, the vulcanizing agent includes sulfur.

[0024] Furthermore, the rubber composition also includes at least one of a vulcanization accelerator, a vulcanization activator, an antioxidant, a softener, a protective wax, a tackifier, an adhesion enhancer, a coupling agent, a rubber dispersant, a scorch retarder and an operating aid.

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

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The rubber composition of the present invention has a low content of unsaturated carbon-carbon double bonds in the modified bio-based oil by adding the modified bio-based oil with a specific structure, thereby reducing the influence of the unsaturated carbon-carbon double bonds on the rubber vulcanization process and helping 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 various components of the rubber compound more uniform and improve the operating performance; the modified bio-based oil contains polysulfide bonds, which can participate in the vulcanization reaction during the rubber vulcanization process and help to improve the dynamic properties of the rubber compound. DETAILED DESCRIPTION

[0028] The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but it will be appreciated by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work, all belong to the scope of protection of the present invention. If specific conditions are not indicated in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not indicated in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0029] A rubber composition and a rubber product of the present invention are described in detail below.

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

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

[0032] The rubber processing oil includes 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 unsaturated carbon-carbon double bonds of bio-based oil; and x is an integer between 2 and 6.

[0034] The rubber composition of the present invention improves the crosslinking density and mechanical properties of the rubber by adding modified bio-based oil; makes the mixing between the various components of the rubber more uniform, improves the operating performance; and can participate in the vulcanization reaction of the rubber, which is beneficial to improving the performance of the rubber.

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

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

[0037] The modified bio-based oil contains polysulfide bonds, which can participate in the vulcanization reaction during the rubber vulcanization process, which is beneficial to improving the dynamic properties of the rubber compound.

[0038] Modified bio-based oil is a renewable resource derived from organisms and is more environmentally friendly than petroleum-based oil.

[0039] In different embodiments of the present invention, the mass fractions of the components of the rubber composition may be as follows:

[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 of any two of them; preferably 50 to 100 parts; more preferably 50 to 80 parts;

[0042] The mass fraction of the rubber processing oil may 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 consisting 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 consisting of any two of them.

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

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

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

[0047] In some embodiments of the invention, the bio-based oil comprises vegetable oil and / or animal oil.

[0048] In some embodiments of the present invention, 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 butter, palm oil, linseed oil, dewaxed corn oil, camellia oil and macadamia 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. The components of castor oil include: 80%-85% ricinoleic acid, 7% oleic acid, 3% linoleic acid, 2% palmitic acid and 1% stearic acid.

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

[0051] Flaxseed oil is made from flax seeds and is mainly composed of oleic acid (20%-35%), linoleic acid (15%-25%) and linolenic acid (35%-53%).

[0052] Peanut oil contains palmitic acid, stearic acid, arachidic acid, behenic acid, lignoic acid, oleic acid, linoleic acid, etc., among which palmitic acid accounts for about 13%, stearic acid 3%-5%, lignoic acid 6%-8%, oleic acid 37% and linoleic acid 38%.

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

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

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

[0056] Camellia oil is extracted from the seeds of the Camellia tree of the Theaceae family, the genus Camellia. It contains over 90% unsaturated fatty acids, 80% to 83% oleic acid, and 7% to 13% linoleic acid.

[0057] Macadamia oil is an edible oil obtained from macadamia nuts through different processing methods.

[0058] In some embodiments of the present invention, the animal oil comprises at least one of lard, fish oil, beef tallow and sheep oil.

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

[0060] In some embodiments of the present invention, the usage ratio of bio-based oil and disulfur dichloride is 100g:0.1-5mol; typically but not limitatively, for example, the usage ratio of bio-based oil and disulfur dichloride can be 100g:0.1mol, 100g:1mol, 100g:2mol, 100g:3mol, 100g:4mol, 100g:5mol or a range of any two thereof.

[0061] In some embodiments of the present invention, the mass ratio of polysulfide to bio-based oil in the polysulfide solution is 1:(0.5-1); typically but not limitatively, for example, the amount ratio of sodium polysulfide to bio-based oil in the sodium polysulfide solution 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 thereof; preferably, the polysulfide solution is an aqueous solution of polysulfides.

[0062] In some embodiments of the present invention, the reaction includes: reacting at 30-60°C for 1-5h; typically but not limiting, for example, the reaction temperature is 30°C, 40°C, 50°C, 60°C or a range consisting of any two thereof; the reaction time is 1h, 2h, 3h, 4h, 5h or a range consisting of any two thereof.

[0063] In some embodiments of the present invention, the separation is carried out under stirring at 30-60°C.

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

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

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

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

[0068] The rubber processing oil of the present invention is a modified bio-based oil; or, the rubber processing oil is a mixed oil containing modified bio-based oil and petroleum-based oil.

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

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

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

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

[0073] In some embodiments of the present invention, when the rubber processing oil is a mixed oil, the rubber processing oil further comprises a compatibilizer. The modified bio-based oil and the petroleum-based oil are mixed by adding a compatibilizer to improve the uniformity and stability of the mixed oil.

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

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

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

[0077] Add one of the bio-based oil and petroleum-based oil into a container with a stirring device, and slowly heat it to 50-150°C; then gradually add a compatibilizer and mix it, and a stirrer or an ultrasonic cleaner can be used to help mix, so as to obtain an oil sample containing a compatibilizer;

[0078] Another oil is gradually added into the oil sample containing the extender while stirring until the oil samples are evenly mixed without stratification to obtain a mixed oil.

[0079] Preferably, the mixing temperature is 50 to 150°C; preferably 60 to 120°C; more preferably 80 to 100°C;

[0080] Preferably, the stirring method can be a magnetic stirrer, a mechanical stirrer or an ultrasonic stirrer, and the stirring intensity or speed is adjusted according to the mixing conditions.

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

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

[0083] In some embodiments of the present invention, the filler includes at least one of carbon black, a siliceous filler, and an aluminum filler.

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

[0085] The siliceous filler includes silicon dioxide (SiO2); the silicon dioxide includes at least one of wet silicon dioxide and dry silicon dioxide; preferably, the specific surface area of ​​the silicon dioxide is less than 450m 2 / g, more preferably, the specific surface area of ​​silicon dioxide is 50 to 400 m 2 / g, for example, Ultrasil 7000 silica produced by Degussa.

[0086] Aluminum fillers include alumina (Al3O2).

[0087] In some embodiments of the invention, the vulcanizing agent comprises sulfur.

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

[0089] In some embodiments of the present invention, 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 invention, the vulcanization activator includes zinc oxide and / or zinc stearate.

[0091] In some embodiments of the present invention, the softening agent comprises an aromatic oil.

[0092] The present invention does not impose strict restrictions on the type and amount of each auxiliary agent, and conventional types and amounts may be used or adjusted according to actual requirements.

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

[0094] The raw materials except the vulcanizer, the vulcanization accelerator and the vulcanization activator are added into an internal mixer, and kneaded at 140-160° C. to obtain a masterbatch; after the masterbatch is cooled to below 90° C., the masterbatch, the vulcanizer, the vulcanization activator and the vulcanization accelerator are added into an open mixer, and kneaded at 30-100° C. to obtain a rubber composition.

[0095] Some embodiments of the present invention further provide a rubber product, which is prepared using the rubber composition.

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

[0097] Examples and Comparative Examples

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

[0099] Table 1

[0100]

[0101] The method for preparing modified bio-based oil comprises the following steps:

[0102] Add bio-based oil to a reactor equipped with a stirring device, a thermometer and a distillation device, add disulfur dichloride (S2Cl2) dropwise, and react at a temperature of 30-60°C for 1-5 hours; then add an aqueous solution of sodium polysulfide to the reactor, stir and separate, add iron powder for reduction, remove free sulfur in the system, and obtain modified bio-based oils A1, A2, and A3, respectively.

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

[0104] Table 2

[0105]

[0106] The method for preparing a rubber composition comprises the following steps:

[0107] The raw materials except the vulcanizer, the vulcanization accelerator and the vulcanization activator are added into an internal mixer, and kneaded at 140-160° C. to obtain a masterbatch; after the masterbatch is cooled to below 90° C., the masterbatch, the vulcanizer, the vulcanization accelerator and the vulcanization activator are added into an open mixer, and kneaded at 30-100° C. to obtain a rubber composition.

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

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

[0110] The preparation method of the mixed oil is as follows: adding the modified bio-based oil into a container with a stirring device, slowly heating it to 70-90° C.; then gradually adding polyamide wax and mixing, to obtain an oil sample containing a compatibilizer;

[0111] The RAE oil is gradually added to the oil sample containing the extender while stirring until the oil sample is evenly mixed without stratification to obtain a mixed oil.

[0112] Table 3

[0113]

[0114]

[0115] Test example

[0116] The properties of 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 obtained in Examples 1 to 6 and Comparative Example 1 were tested, and the results are shown in Table 5.

[0120] The following performance tests were performed on the rubber composition after vulcanization, wherein the vulcanization method was that the rubber composition was vulcanized at 150° C. for 30 minutes.

[0121] Tensile property test: According to the standard GB / T528-2009, the tensile strength and elongation at break of the vulcanized rubber composition are tested. The tensile strength is the tensile stress recorded at the moment of fracture of the tensile specimen, in MPa. The elongation at break is the elongation of the specimen at the moment of fracture, in %.

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

[0123] Dynamic mechanical properties: The dynamic properties of the vulcanized rubber composition are tested according to the standard GB / T13937-1992; the detection frequency is 11HZ, the detection displacement is 15um, and 60℃tanσ is used to characterize the dynamic properties of the rubber. The smaller the value, the smaller the hysteresis loss of the rubber and the lower the dynamic heat generation.

[0124] Table 5

[0125]

[0126]

[0127] As shown in Table 5, among Examples 1 to 3, Example 2 has the highest modulus of tensile stress and tensile strength, but the modulus of tensile stress is 8% lower than that of Comparative Example 1; among Examples 4 to 6, Example 4 has the best modulus of tensile stress and tensile strength, which is consistent with that of Comparative Example 1. The dynamic properties of the rubber compound are characterized by tanδ at 60°C, and the dynamic properties of Example 4 are close to those of Comparative Example 1. The modified rice bran oil is slightly lower than petroleum-based oil in rubber properties. After being combined with a certain proportion of petroleum-based oil, the mechanical properties and dynamic properties of the rubber can be consistent with those of petroleum-based oil.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rubber composition, characterized in that: According to the mass percentage, it includes the following components: 100 parts of rubber, 40-120 parts of filler, 0.1-50 parts of rubber operating oil and 0.1-15 parts of vulcanizing agent; Wherein, the rubber processing oil comprises a modified bio-based oil, and the modified bio-based oil has the following structure: In the formula, R1 and R2 are selected from the residues after the reaction of unsaturated carbon-carbon double bonds of 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 comprises the following steps: The bio-based oil and disulfur dichloride are reacted to obtain a reaction liquid; a polysulfide solution is added to the reaction liquid, and the mixture is stirred and separated into layers 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 vegetable oil comprises at least one of castor oil, peanut oil, sunflower oil, rapeseed oil, soybean oil, corn oil, rice bran oil, cottonseed oil, shea butter, palm oil, linseed oil, dewaxed corn oil, camellia oil and macadamia nut oil; The animal oil includes at least one of lard, fish oil, beef tallow and sheep oil.

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

5.

5. The rubber composition according to claim 4, characterized in that The rubber processing oil also includes a compatibilizer; And / or, the mass of the compatibilizer is 0.1% to 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, butadiene rubber, chloroprene rubber, nitrile rubber, ethylene-propylene rubber, silicone rubber, fluororubber and acrylic rubber.

7. The rubber composition according to claim 1, characterized in that The filler includes at least one of carbon black, siliceous filler and aluminum 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 further comprises at least one of a vulcanization accelerator, a vulcanization activator, an antioxidant, a softener, a protective wax, a tackifier, an adhesion enhancer, a coupling agent, a rubber dispersant, a scorch retarder and a processing aid.

10. A rubber product, characterized in that: The rubber composition is prepared by using the rubber composition described in any one of claims 1 to 9.

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