Tire inner liner composite material and preparation method thereof

Abstract

The invention belongs to the field of rubber composite materials, and particularly relates to a tire inner liner composite material and a preparation method thereof. The composite material provided by the invention is prepared from the following raw materials: 100 to 115 parts of raw rubber, 20 to 80 parts of reinforcing filler, 20 to 100 parts of inorganic filler, 2 to 15 parts of activating agent, 4 to 30 parts of plasticizer, 0 to 10 parts of magnesium oxide, 1 to 10 parts of accelerant, 0.5 to 10 parts of vulcanizing agent and 1 to 10 parts of homogenizing agent, the raw rubber comprises butyl synthetic rubber, and the synthetic raw materials of the butyl synthetic rubber comprise bio-based isoprene and isobutene authenticated by ISCC PLUS; the reinforcing filler comprises bio-oil carbon black, cracked carbon black, recovered oil carbon black, rice hull ash white carbon black and CO2 process white carbon black; the inorganic filler is negative carbon calcium carbonate; and the plasticizer is a bio-based rubber plasticizer. The preparation raw materials of the tire inner liner composite material provided by the invention comprise a large amount of non-petroleum-based materials, so that the composite material is green and low-carbon.

Description

Technical Field

[0001] The present invention belongs to the field of rubber composites, and particularly relates to a tire innerliner composite material and a preparation method thereof. Background Art

[0002] With the development of the economy and social progress, the transportation industry has become an important part of the national economy, and its development has attracted great attention from various countries. In recent years, energy transformation and green and low-carbon development have become an irresistible global trend.

[0003] With the opening of the global carbon trading market, as a major carbon emitter, the tire industry chain urgently needs to reduce carbon emissions, reduce the carbon footprint, and save carbon costs. At present, the raw materials used in the tire production process are mainly petroleum-based materials from petrochemical resources, with less application of sustainable and renewable materials and relatively high carbon emissions.

[0004] In the existing tire innerliner formulation technology and innerliner rubber patent technology, the raw materials are mainly products obtained from the industrial purification and processing of petroleum fossil resources, with high carbon emissions. Using non-petroleum-based materials such as recyclable, sustainable, and renewable raw materials to prepare green and low-carbon innerliner composite materials is beneficial to reducing the carbon emissions of tire enterprises, protecting the environment, and is of great significance to the development of the tire industry. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a tire innerliner composite material and a preparation method thereof. The preparation raw materials of the tire innerliner composite material contain a large amount of non-petroleum-based materials, which are green and low-carbon.

[0006] The present invention provides a tire innerliner composite material. Calculated by mass parts, the preparation raw materials include:

[0007]

[0008]

[0009] The raw rubber is butyl synthetic rubber, or a mixture of butyl synthetic rubber and other rubbers; the synthesis raw materials of the butyl synthetic rubber include isobutene and bio-based isoprene, and the isobutene has passed the ISCC PLUS certification; the other rubber is natural rubber and / or butyl recycled rubber;

[0010] The reinforcing filler includes one or more of bio-oil carbon black, pyrolytic carbon black, recycled oil carbon black, rice husk silica white carbon black, and CO2 process white carbon black;

[0011] The inorganic filler is negative carbon calcium carbonate prepared by carbonizing calcium-based solid waste;

[0012] The plasticizer is a bio-based rubber plasticizer.

[0013] Preferably, the mass fraction of the butyl synthetic rubber in the preparation raw materials is 40 to 115 parts.

[0014] Preferably, the mass fraction of the natural rubber in the preparation raw materials is 0 to 40 parts.

[0015] Preferably, the mass fraction of the butyl reclaimed rubber in the preparation raw materials is 0 to 60 parts.

[0016] Preferably, the bio-based rubber plasticizer is one or more of soybean oil, linseed oil, castor oil, cashew oil, palm oil, rosin resin, terpene resin, cashew oil modified resin and limonene modified resin.

[0017] Preferably, the activator is one or more of zinc oxide, stearic acid, lead oxide and titanium dioxide.

[0018] Preferably, the mass ratio of the zinc oxide to the stearic acid is 1:(0.5 - 2).

[0019] Preferably, the accelerator is one or more of thiazole accelerators, thiuram accelerators, dithiocarbamate accelerators, xanthate accelerators, guanidine accelerators, aldehyde-amine accelerators, sulfenamide accelerators and thiourea accelerators.

[0020] Preferably, the vulcanizing agent is sulfur.

[0021] The present invention provides a preparation method of the tire inner liner composite material according to the above technical solution, comprising the following steps:

[0022] a) Mix and refine the raw rubber, magnesium oxide, homogenizer and part of the activator, and then mix and refine with the filler reinforcing agent, inorganic filler and plasticizer to obtain the masterbatch;

[0023] b) Mix and refine the masterbatch, accelerator, vulcanizing agent and the other part of the activator to obtain the final masterbatch;

[0024] c) Vulcanize the final masterbatch to obtain the tire inner liner composite material.

[0025] Compared with the prior art, the present invention provides a tire innerliner composite material and a preparation method thereof. Calculated by mass parts, the raw materials for preparing the tire innerliner composite material provided by the present invention include: 100-115 parts of raw rubber, 20-80 parts of reinforcing filler, 20-100 parts of inorganic filler, 2-15 parts of activator, 4-30 parts of plasticizer, 0-10 parts of magnesium oxide, 1-10 parts of accelerator, 0.5-10 parts of vulcanizing agent, and 1-10 parts of homogenizer; the raw rubber is butyl synthetic rubber, or a mixture of butyl synthetic rubber and other rubbers; the synthesis raw materials of the butyl synthetic rubber include bio-based isoprene and ISCC PLUS-certified isobutene, and the other rubber is natural rubber and / or butyl recycled rubber; the reinforcing filler is one or more of bio-oil carbon black, pyrolytic carbon black, recycled oil carbon black, rice husk silica white carbon black, and CO2-processed white carbon black; the inorganic filler is negative-carbon calcium carbonate prepared by carbonizing calcium-based solid waste; the plasticizer is a bio-based rubber plasticizer. The present invention uses a large number of non-petroleum-based raw materials such as bio-based raw materials, recycled raw materials, sustainable development raw materials, and negative-carbon materials to prepare the tire innerliner composite material, reducing the carbon emissions of the composite material. At the same time, compared with the petroleum-based material formula, there are no obvious differences in the airtightness, mechanical properties, etc. of the product, meeting the use requirements of tires. In addition, the processing process of the tire innerliner composite material provided by the present invention is simple, has low requirements for equipment, and has excellent processing performance, suitable for wide use. Detailed Embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0027] The present invention provides a tire innerliner composite material. Calculated by mass parts, the raw materials for preparation include:

[0028]

[0029]

[0030] In the tire innerliner composite material provided by the present invention, among the raw materials for preparation, the raw rubber is butyl synthetic rubber, or a mixture of butyl synthetic rubber and other rubbers; wherein, the synthesis raw materials of the butyl synthetic rubber include isobutene and bio-based isoprene, and the isobutene has passed the ISCC PLUS certification; the other rubber is natural rubber and / or butyl recycled rubber.

[0031] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the specific type of the butyl synthetic rubber is preferably one or more of ordinary butyl rubber, brominated butyl rubber, chlorinated butyl rubber and star-branched butyl rubber certified by ISCC PLUS, and more preferably brominated butyl rubber BIIR 2828 certified by ISCC PLUS.

[0032] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the raw rubber can be 100 parts, 101 parts, 102 parts, 103 parts, 104 parts, 105 parts, 106 parts, 107 parts, 108 parts, 109 parts, 110 parts, 111 parts, 112 parts, 113 parts, 114 parts or 115 parts.

[0033] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the butyl synthetic rubber is preferably 40 to 115 parts, specifically 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 ​​parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165

[0034] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the natural rubber is preferably TSR#20 rubber.

[0035] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the natural rubber is preferably 0-40 parts, specifically 0 parts, 1 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts or 40 parts.

[0036] In the tire inner liner composite material provided by the present invention, among the preparation raw materials, the mass fraction of the butyl reclaimed rubber is preferably 0 to 60 parts, and specifically can be 0 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts or 60 parts.

[0037] In the tire inner liner composite material provided by the present invention, among the preparation raw materials, the reinforcing filler includes one or more of bio-oil carbon black, pyrolytic carbon black, recycled oil carbon black, rice husk silica white carbon black and CO2 process white carbon black; wherein, the model of the pyrolytic carbon black is preferably EN660. In the present invention, the reinforcing filler preferably further includes common carbon black; the model of the common carbon black is preferably N660.

[0038] In the tire inner liner composite material provided by the present invention, among the preparation raw materials, the mass fraction of the reinforcing filler can specifically be 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts or 80 parts.

[0039] In the tire inner liner composite material provided by the present invention, among the preparation raw materials, the mass fraction of the common carbon black is preferably 0 to 30 parts, and specifically can be 0 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts.

[0040] In the tire airtight layer composite material provided by the present invention, among the preparation raw materials, the inorganic filler is negative carbon calcium carbonate prepared by carbonization of calcium-based solid waste. Generally speaking, each ton of negative carbon calcium carbonate produced can effectively absorb 0.4 to 0.5 tons of CO2.

[0041] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the inorganic filler can be 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 ​​parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts , 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 or 100 copies.

[0042] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the activator is preferably one or more of zinc oxide, stearic acid, lead oxide and titanium dioxide; wherein the zinc oxide is preferably nano zinc oxide; the mass ratio of zinc oxide to stearic acid is preferably 1:(0.5-2), specifically 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9 or 1:2.

[0043] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the activator can be specifically 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts.

[0044] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the plasticizer is a bio-based rubber plasticizer, preferably one or more of soybean oil, linseed oil, castor oil, cashew oil, palm oil, rosin resin, terpene resin, cashew oil modified resin and limonene modified resin; wherein the mass ratio of the castor oil to the rosin resin is preferably (5-20):5, specifically 5:5, 6:5, 7:5, 8:5, 9:5, 10:5, 11:5, 12:5, 13:5, 14:5, 15:5, 16:5, 17:5, 18:5, 19:5 or 20:5.

[0045] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the plasticizer can be 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts or 30 parts.

[0046] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the magnesium oxide can be specifically 0 parts, 1 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts.

[0047] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the accelerator is preferably one or more of thiazole accelerators, thiuram accelerators, dithiocarbamate accelerators, xanthate accelerators, guanidine accelerators, aldehyde amine accelerators, sulfonamide accelerators and thiourea accelerators; wherein the thiazole accelerator is preferably dibenzothiazyl disulfide (MBTS).

[0048] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the accelerator can be specifically 1 part, 1.2 parts, 1.5 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts.

[0049] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the vulcanizing agent is preferably sulfur, and more preferably insoluble sulfur prepared from refined recovered oil.

[0050] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the mass fraction of the vulcanizing agent can be specifically 0.5 parts, 1 parts, 1.5 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts.

[0051] In the tire airtight layer composite material provided by the present invention, in the preparation raw materials, the grade of the homogenizer is preferably 40MSF.

[0052] In the tire inner liner composite material provided by the present invention, among the preparation raw materials, the mass fraction of the homogenizer can specifically be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts.

[0053] The present invention also provides a preparation method of the tire inner liner composite material described in the above technical solution, including the following steps:

[0054] a) Mix and refine raw rubber, magnesium oxide, homogenizer and part of the activator, and then mix and refine with the filler reinforcing agent, inorganic filler and plasticizer to obtain masterbatch;

[0055] b) Mix and refine the masterbatch, accelerator, vulcanizing agent and another part of the activator to obtain the final masterbatch;

[0056] c) Vulcanize the final masterbatch to obtain the tire inner liner composite material.

[0057] In the preparation method provided by the present invention, in step a), the rotation speed of the first-stage mixing and refining is preferably 40 - 70 rpm, and can specifically be 40 rpm, 45 rpm, 50 rpm, 55 rpm, 60 rpm, 65 rpm or 70 rpm; the pressure of the first-stage mixing and refining is preferably 0.4 - 0.6 MPa, and can specifically be 0.4 MPa, 0.45 MPa, 0.5 MPa, 0.55 MPa or 0.6 MPa; the temperature of the first-stage mixing and refining is preferably 120 - 150 °C, and can specifically be 120 °C, 125 °C, 130 °C, 135 °C, 140 °C, 145 °C or 150 °C; the time of the first-stage mixing and refining is preferably 30 - 40 s, and can specifically be 30 s, 31 s, 32 s, 33 s, 34 s, 35 s, 36 s, 37 s, 38 s, 39 s or 40 s.

[0058] In the preparation method provided by the present invention, in step a), the rotation speed of the second-stage mixing and refining is preferably 40 - 70 rpm, and can specifically be 40 rpm, 45 rpm, 50 rpm, 55 rpm, 60 rpm, 65 rpm or 70 rpm; the pressure of the second-stage mixing and refining is preferably 0.4 - 0.6 MPa, and can specifically be 0.4 MPa, 0.45 MPa, 0.5 MPa, 0.55 MPa or 0.6 MPa; the temperature of the second-stage mixing and refining is preferably 120 - 150 °C, and can specifically be 120 °C, 125 °C, 130 °C, 135 °C, 140 °C, 145 °C or 150 °C; the time of the second-stage mixing and refining is preferably 60 - 200 s, and can specifically be 60 s, 70 s, 80 s, 90 s, 100 s, 110 s, 120 s, 130 s, 140 s, 150 s, 160 s, 170 s, 180 s, 190 s or 200 s.

[0059] In the preparation method provided by the present invention, in step b), the rotation speed of the mixed refining is preferably 30-55 rpm, specifically 30 rpm, 35 rpm, 40 rpm, 45 rpm, 50 rpm or 55 rpm; the pressure of the mixed refining is preferably 0.4-0.6 MPa, specifically 0.4 MPa, 0.45 MPa, 0.5 MPa, 0.55 MPa or 0.6 MPa; the temperature of the mixed refining is preferably 100-120 °C, specifically 100 °C, 105 °C, 110 °C, 115 °C or 120 °C; the time of the mixed refining is preferably 60-150 s, specifically 60 s, 70 s, 80 s, 90 s, 100 s, 110 s, 120 s, 130 s, 140 s or 150 s.

[0060] In the preparation method provided by the present invention, in step c), the temperature of the vulcanization is preferably 130-180 °C, specifically 130 °C, 140 °C, 150 °C, 160 °C, 170 °C or 180 °C; the pressure of the vulcanization is preferably 20-40 t, specifically 20 t, 25 t, 30 t, 35 t or 40 t; the time of the vulcanization is preferably 5-60 min, specifically 5 min, 10 min, 15 min, 20 min, 25 min, 30 min, 40 min, 50 min or 60 min.

[0061] The technical solution provided by the present invention uses a large number of non-petroleum-based raw materials such as bio-based raw materials, recycled raw materials, sustainable development raw materials and negative carbon materials to prepare the tire airtight layer composite material, reducing the carbon emission of the composite material. At the same time, compared with the petroleum-based material formula, the airtightness and mechanical properties of the product have no obvious differences, meeting the tire use requirements. In addition, the processing technology of the tire airtight layer composite material provided by the present invention is simple, has low requirements for equipment, and has excellent processing performance, suitable for wide use.

[0062] For the sake of clarity, the following will be described in detail through the following examples and comparative examples.

[0063] In the following examples of the present invention, the brominated butyl rubber used is brominated butyl rubber BIIR 2828 certified by ISCC PLUS. This brominated butyl rubber is mainly synthesized from bio-based isoprene monomers and isobutene prepared by recycling oil cracking (isobutene is certified by ISCC PLUS), and the manufacturer is Shandong Jingbo Zhongju New Materials Co., Ltd.

[0064] In the following examples and comparative examples of the present invention, the index parameters of the butyl recycled rubber used are shown in Table 1:

[0065] Table 1 Performance indicators of butyl recycled rubber

[0066]

[0067] Example 1

[0068] A green and low-carbon tire innerliner composite material contains the following components by mass parts: 70 parts of bromobutyl rubber certified by ISCC PLUS, 15 parts of natural rubber (TSR#20 rubber), 30 parts of butyl reclaimed rubber, 1 part of stearic acid, 20 parts of carbon black N660, 30 parts of pyrolytic carbon black EN660, 30 parts of negative carbon calcium carbonate, 12 parts of castor oil, 5 parts of rosin resin, 6 parts of homogenizer 40MSF, 1 part of nano-zinc oxide, 0.5 part of insoluble sulfur prepared from refined recycled oil, and 1.2 parts of accelerator MBTS.

[0069] The preparation method of the above tire innerliner composite material is as follows:

[0070] Preparation of the first-stage masterbatch: Set the speed of the internal mixer at 50 rpm, the pressure of the upper plug at 0.5 MPa, and the set temperature of the internal mixer at 130 °C. Add raw rubber (bromobutyl rubber, natural rubber, butyl reclaimed rubber), activator (stearic acid), and homogenizer (40MSF) into the internal mixer. After pressing the upper plug and kneading for 30 - 40 s, add filler and reinforcing agent (carbon black), inorganic filler (negative carbon calcium carbonate), and plasticizer (castor oil, rosin resin). After pressing the upper plug and mixing for 80 s, discharge the rubber.

[0071] Preparation of the second-stage final compound: Set the speed of the internal mixer at 40 rpm, the pressure of the upper plug at 0.5 MPa, and the set temperature of the internal mixer at 110 °C. Add the first-stage masterbatch, activator (nano-zinc oxide), accelerator (MBTS), and vulcanizing agent (insoluble sulfur) into the internal mixer. After pressing the upper plug and mixing for 70 s, discharge the rubber.

[0072] Vulcanization: Add the final compound into the vulcanization mold and vulcanize it at 150 °C and 30 tons of pressure for 30 min to obtain the green and low-carbon tire innerliner composite material.

[0073] Example 2

[0074] A green and low-carbon tire innerliner composite material contains the following components by mass parts: 100 parts of bromobutyl rubber certified by ISCC PLUS, 1 part of stearic acid, 20 parts of carbon black N660, 30 parts of pyrolytic carbon black EN660, 30 parts of negative carbon calcium carbonate, 12 parts of castor oil, 5 parts of rosin resin, 6 parts of homogenizer 40MSF, 1 part of nano-zinc oxide, 0.5 part of insoluble sulfur prepared from refined recycled oil, and 1.2 parts of accelerator MBTS.

[0075] The preparation method of the above tire innerliner composite material refers to Example 1 and will not be elaborated here.

[0076] Example 3

[0077] A green and low-carbon tire inner liner composite material contains the following components by mass: 70 parts of bromobutyl rubber certified by ISCC PLUS, 15 parts of natural rubber (TSR#20 rubber), 30 parts of butyl reclaimed rubber, 1 part of stearic acid, 50 parts of pyrolytic carbon black EN660, 30 parts of negative carbon calcium carbonate, 12 parts of castor oil, 5 parts of rosin resin, 6 parts of homogenizer 40MSF, 1 part of nano zinc oxide, 0.5 part of insoluble sulfur prepared from refined recycled oil, and 1.2 parts of accelerator MBTS.

[0078] The preparation method of the above tire inner liner composite material refers to Example 1 and will not be elaborated here.

[0079] Comparative Example 1

[0080] A tire inner liner composite material contains the following components by mass: 70 parts of bromobutyl rubber BIIR2828, 15 parts of natural rubber (TSR#20 rubber), 30 parts of butyl reclaimed rubber, 50 parts of carbon black N660, 30 parts of calcium carbonate, 1 part of nano zinc oxide, 1 part of stearic acid, 6 parts of homogenizer 40MSF, 5 parts of tackifying resin SP1068, 12 parts of aromatic oil, 0.5 part of sulfur, and 1.2 parts of accelerator MBTS.

[0081] The preparation method of the above tire inner liner composite material refers to Example 1 and will not be elaborated here.

[0082] Performance evaluation

[0083] The physical and mechanical properties of the tire inner liner composite materials prepared in the examples and comparative examples were tested, and the results are shown in Table 2 below:

[0084] Table 2 Performance indicators of tire inner liner composite materials

[0085]

[0086]

[0087] It can be seen from the comparative examples and examples that the tire inner liner composite material prepared in the examples of the present invention can significantly reduce the usage rate of traditional petroleum-based materials, and at the same time, its performance in air retention and resistance to flexural failure is comparable to that of the tire inner liner composite material prepared from traditional petroleum-based materials. The technical solution provided by the present invention can greatly alleviate the demand for non-renewable petroleum resources, reduce carbon emissions in the tire industrial chain, and achieve the purpose of reducing greenhouse gas emissions and protecting the environment.

[0088] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A tire inner liner composite material, characterized in that, On a mass parts basis, the preparation raw materials include: The raw rubber is butyl synthetic rubber, or a mixture of butyl synthetic rubber and other rubbers; the synthesis raw materials of the butyl synthetic rubber include isobutene and bio-based isoprene, and the isobutene has passed the ISCC PLUS certification; the other rubber is natural rubber and / or butyl reclaimed rubber; The reinforcing filler includes one or more of bio-oil carbon black, pyrolytic carbon black, recycled oil carbon black, rice husk silica white carbon black, and CO2 process white carbon black; The inorganic filler is negative carbon calcium carbonate prepared by carbonizing calcium-based solid waste; The plasticizer is a bio-based rubber plasticizer.

2. The tire innerliner composite material according to claim 1, characterized in that, The mass parts of the butyl synthetic rubber in the preparation raw materials are 40 to 115 parts.

3. The tire airtight layer composite material according to claim 1, wherein, The mass parts of the natural rubber in the preparation raw materials are 0 to 40 parts.

4. The tire innerliner composite material according to claim 1, wherein, The mass parts of the butyl reclaimed rubber in the preparation raw materials are 0 to 60 parts.

5. The tire inner liner composite material according to claim 1, characterized in that, The bio-based rubber plasticizer is one or more of soybean oil, linseed oil, castor oil, cashew nut oil, palm oil, rosin resin, terpene resin, cashew nut oil modified resin, and limonene modified resin.

6. The tire airtight layer composite material according to claim 1, wherein, The activator is one or more of zinc oxide, stearic acid, lead oxide, and titanium dioxide.

7. The tire innerliner composite material according to claim 6, characterized in that, The mass ratio of the zinc oxide to the stearic acid is 1:(0.5 to 2).

8. The tire airtight layer composite material according to claim 1, characterized in that, The accelerator is one or more of thiazole accelerators, thiuram accelerators, dithiocarbamate accelerators, xanthate accelerators, guanidine accelerators, aldehyde-amine accelerators, sulfenamide accelerators, and thiourea accelerators.

9. The tire airtight layer composite material according to claim 1, characterized in that, The vulcanizing agent is sulfur.

10. A method for preparing the tire airtight layer composite material according to any one of claims 1 to 9, characterized in that, It includes the following steps: a) Mix and refine the raw rubber, magnesium oxide, homogenizer, and part of the activator, and then mix and refine with the reinforcing filler, inorganic filler, and plasticizer to obtain the masterbatch; b) Mix and refine the masterbatch, accelerator, vulcanizing agent, and the other part of the activator to obtain the final masterbatch; c) Vulcanize the final masterbatch to obtain the tire inner liner composite material.

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