CN110128723B - Rubber for high-bearing solid tire and preparation method thereof - Google Patents
Rubber for high-bearing solid tire and preparation method thereof Download PDFInfo
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- CN110128723B CN110128723B CN201910454853.5A CN201910454853A CN110128723B CN 110128723 B CN110128723 B CN 110128723B CN 201910454853 A CN201910454853 A CN 201910454853A CN 110128723 B CN110128723 B CN 110128723B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/28—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic compounds containing nitrogen, sulfur or phosphorus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L17/00—Compositions of reclaimed rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C2001/0091—Compositions of non-inflatable or solid tyres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention discloses rubber for a high-bearing solid tire and a preparation method thereof, and the rubber for the high-bearing solid tire comprises inner layer rubber and tread rubber; the inner layer rubber comprises the following components in parts by weight: 90-100 parts of reclaimed rubber, 50-60 parts of natural rubber, 1.2-1.56 parts of activating agent, 0.45-0.57 part of accelerator, 1-2 parts of sulfur and 1.2-1.6 parts of silane coupling agent; the tread rubber comprises the following components: 140 portions of regenerated rubber 130-140 portions, 30-40 portions of super wear-resistant carbon black, 1.8-2.16 portions of activator, 1.5-2 portions of plasticizer, 0.1-0.2 portion of anti-coking agent and 1-1.4 portions of antifogging agent. The inner layer rubber prepared by taking the reclaimed rubber and the natural rubber as main raw materials has high load-carrying strength, and the tread rubber with good wear resistance is used as the rubber for the solid tire, so that the inner layer rubber has excellent bearing capacity and better wear resistance.
Description
Technical Field
The invention relates to the technical field of rubber material processing, in particular to rubber for a high-load solid tire and a preparation method thereof.
Background
The tire is a circular ring-shaped elastic rubber product which is assembled on various vehicles or machines and rolls in a grounding way; generally mounted on a metal rim, and is capable of supporting a vehicle body, buffering external impact, achieving contact with a road surface and ensuring the driving performance of a vehicle. According to the different carcass structures of the tires, the tires can be divided into pneumatic tires and solid tires, most of modern automobiles adopt the pneumatic tires, the carcass of the solid tire is solid, a cord is not used as a framework, inflation is not needed, and an inner tube or an inner liner is not needed; solid tires are currently used only for high-load vehicles or machines traveling at low speeds; solid tires are generally classified into bonded tires in which rubber is directly vulcanized on a rim and non-bonded tires in which rubber is vulcanized and then fixed on a rim.
In the prior art, patent application publication No. CN107099064A discloses a rubber for solid tires and a preparation method thereof, wherein the rubber comprises the following components: natural rubber, nitrile rubber, polybutadiene, hydroxyethyl acrylate, graphene, nano titanium dioxide, stearic acid, an anti-aging agent, a vulcanizing agent, a coupling agent and a filler. The preparation method comprises the following steps: firstly, plasticating the polymer in an internal mixer, then adding the graphene, the hydroxyethyl acrylate and the silane coupling agent for continuous mixing, then sequentially adding the rest components, completing mixing and then carrying out rubber discharge to obtain the rubber for the solid tire.
Unlike a hollow tire, the solid tire is solid except for a center of gravity maintained by a hollow core in the middle, and the reduction of the air content causes the solid tire to have a lower load bearing capacity than a pneumatic tire, but the solid tire still occupies a major position on a construction vehicle because the solid tire has excellent wear resistance and puncture resistance. Since the bearing capacity of a tire is related to various factors, the size of the tire and the strength of the tire can affect the bearing capacity of the tire besides the amount of air filled in the tire, and therefore, the bearing capacity of the solid tire can be improved by enhancing the mechanical strength of the solid tire. Because the solid tire has no cord and framework, the rubber consumption of the solid tire is large, which also increases the cost of the solid tire; in order to reduce the production cost, natural rubber made of waste rubber can be used for replacing part of raw rubber, but compared with the natural rubber, the strength and the wear resistance of the reclaimed rubber are still poorer, so that the solid tire made of the reclaimed rubber has lower bearing capacity and poorer wear resistance.
Disclosure of Invention
The invention aims to provide a high-bearing solid tire rubber, which is prepared from reclaimed rubber and natural rubber as main raw materials, has high load-bearing strength, is used as a tread rubber with good wear resistance as a solid tire rubber, can reduce the production cost, and has excellent bearing capacity and better wear resistance.
The technical purpose of the invention is realized by the following technical scheme:
a high-bearing solid tire rubber comprises an inner layer rubber and a tread rubber; the inner layer rubber comprises the following components in parts by weight: 90-100 parts of reclaimed rubber, 50-60 parts of natural rubber, 1.2-1.56 parts of activating agent, 0.45-0.57 part of accelerator, 1-2 parts of sulfur and 1.2-1.6 parts of silane coupling agent; the tread rubber comprises the following components: 140 portions of regenerated rubber 130-140 portions, 30-40 portions of super wear-resistant carbon black, 1.8-2.16 portions of activator, 1.5-2 portions of plasticizer, 0.1-0.2 portion of anti-coking agent and 1-1.4 portions of antifogging agent.
By adopting the technical scheme, the inner layer rubber prepared by taking the reclaimed rubber and the natural rubber as main raw materials has high load-carrying strength, and the tread rubber with good wear resistance is used as the rubber for the solid tire, so that the production cost can be reduced, and the rubber has excellent bearing capacity and better durability.
Further, the reclaimed rubber is prepared by adopting the following method:
taking waste tires made of natural rubber, removing steel wires and cord fabrics, and crushing the waste tires at normal temperature to obtain waste rubber powder with the fineness of 15-50 meshes;
secondly, stirring the waste rubber powder, the operation oil and the regenerant in a weight ratio of (4-6) to (2: 1) for 5-10min at the temperature of 40-50 ℃, and then soaking for 1-2h under the conditions that the pressure is 1.5-2.0MPa and the temperature is 140 ℃ and 160 ℃ to obtain pretreated waste rubber powder;
thirdly, the waste rubber powder is activated for 1-2min by microwave under the conditions that the microwave frequency is 2450MHz and the radiation power is 675W;
mixing the waste rubber powder for 10-20min at the temperature of 120-140 ℃ to obtain the reclaimed rubber.
By adopting the technical scheme, the crosslinked structure of the waste rubber powder limits the movement of molecular chains and the reprocessing performance, so that the untreated waste tire is directly filled into the raw rubber, the interface bonding force with the raw rubber is low, the physical and mechanical properties of a rubber product are reduced, and after the waste tire is subjected to activation treatment, the obtained reclaimed rubber can enhance the surface activity of the reclaimed rubber and improve the bonding strength between the reclaimed rubber and the raw rubber, so that the bearing capacity of the solid tire made of the reclaimed rubber is improved, and the durability of the solid tire is improved.
Further, the regenerant is prepared by the following method: according to parts by weight, 10-15 parts of N, N' - (dithiobis-2, 1-phenylene) dibenzoamide, 5-7 parts of N-butyl mercaptan, 3-5 parts of dithiodibenzoic acid and 1-2 parts of zinc oxide are stirred for 10-20min at the speed of 600-1000r/min to obtain the regenerant.
By adopting the technical scheme, the regenerating agent prepared from the raw materials and the operation oil have good desulfurization effect when used for impregnating the waste tires, and the waste rubber powder treated by the regenerating agent can improve the desulfurization efficiency, accelerate the desulfurization process and improve the mechanical property of the rubber material prepared from the waste rubber after being treated by microwave radiation.
Further, the activator consists of zinc oxide and stearic acid in a weight ratio of 5: 1.
By adopting the technical scheme, the stearic acid can improve the solubility and dispersion of zinc oxide in rubber and activate a vulcanization system, and when the zinc oxide and the stearic acid are compounded for use, the synergistic effect is achieved, the utilization rate of sulfur can be improved, the crosslinking density is improved, and the aging resistance of vulcanized rubber is improved.
Further, the accelerator consists of a sulfenamide accelerator and a thiuram accelerator in a weight ratio of 2: 1.
By adopting the technical scheme, the thiuram accelerator and the sulfenamide accelerator have a synergistic effect when used together, so that the activity of the sulfenamide accelerator can be enhanced, the vulcanization time is shortened, the vulcanization temperature is reduced, the sulfur dosage is reduced, the sulfur utilization rate is improved, and the physical and mechanical properties of rubber products are improved.
Further, the sulfenamide accelerator is an accelerator CZ; the thiuram accelerator is an accelerator TMTD.
By adopting the technical scheme, the accelerator CZ (CBS) is a quasi-rapid neutral accelerator, and has the advantages of excellent scorching resistance, safe processing and short vulcanization time; the accelerator TMTD is an overspeed-grade acid accelerator, and when the accelerator CZ and the accelerator TMTD are used together, the accelerator CZ and the accelerator TMTD have a synergistic effect, so that the vulcanization time can be greatly shortened, and the physical and mechanical properties of the solid tire can be improved.
Further, the plasticizer is coumarone resin.
By adopting the technical scheme, the coumarone resin belongs to a coal tar plasticizer, has good compatibility with rubber, can relieve the phenomena of self-vulcanization, scorching and blooming, and can improve the aging resistance of the rubber.
Further, the scorch retarder is N-cyclohexyl thiophthalimide.
By adopting the technical scheme, the N-cyclohexyl thiophthalimide, namely the scorch retarder CTP can effectively prevent the rubber material from scorching in the processing process, improve the production efficiency and simultaneously has the recovery effect on the rubber material which is subjected to high heat or slight scorching.
The invention also aims to provide a preparation method of the rubber for the high-load solid tire.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of rubber for a high-bearing solid tire comprises the following steps:
preparing inner layer glue:
50-60 parts of natural rubber are put into an open mill and plasticated for 5-10min at the temperature of 55-65 ℃ to obtain plasticated rubber;
secondly, banburying the plastication rubber, 90-100 parts of reclaimed rubber, 1.2-1.56 parts of activating agent, 0.45-0.57 part of accelerator, 1-2 parts of sulfur and 1-691.2-1.6 parts of silane coupling agent for 10-15min at the temperature of 110-120 ℃ to obtain inner-layer dense rubber;
thirdly, putting the inner layer banburying rubber into an open mill, open milling for 15-20min at the temperature of 95-105 ℃, taking out the inner layer banburying rubber from the mill, and cooling to obtain the inner layer rubber;
preparing a tread rubber:
firstly, banburying 140 parts of regenerated rubber 130-plus, 30-40 parts of super wear-resistant carbon black, 1.8-2.16 parts of activating agent, 1.5-2 parts of plasticizer, 0.1-0.2 part of anti-scorching agent and 1-1.4 parts of antifogging agent for 10-15min at the temperature of 120-plus 130 ℃ to obtain tread dense rubber;
secondly, putting the tread internal mixing rubber into an open mill, open milling for 15-20min at the temperature of 100-.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the inner layer rubber prepared by taking the reclaimed rubber and the natural rubber as main raw materials has high load-carrying strength, and the tread rubber with good wear resistance is used as the rubber for the solid tire, so that the production cost can be reduced, and the inner layer rubber also has excellent bearing capacity and better durability;
2. because the crosslinked structure of the waste rubber powder limits the movement of molecular chains and the reprocessing performance, the unprocessed waste tire is directly filled into the raw rubber, the interface bonding force with the raw rubber is low, the physical and mechanical properties of a rubber product are reduced, and after the waste tire is subjected to activation treatment, the obtained reclaimed rubber can enhance the surface activity of the reclaimed rubber and improve the bonding strength between the reclaimed rubber and the raw rubber, so that the bearing capacity of a solid tire made of the reclaimed rubber is improved, and the durability of the solid tire is improved;
3. the waste rubber powder treated by the regenerant can be treated by microwave radiation, so that the desulfurization efficiency can be improved, the desulfurization process is accelerated, and the mechanical property of a rubber material prepared from waste rubber can be improved.
Detailed Description
The present invention will be described in further detail below.
First, preparation example of regenerant
Preparation example 1 of regenerant: 10kg of N, N' - (dithiobis-2, 1-phenylene) benzamide, 5kg of N-butylmercaptan, 3kg of dithiodibenzoic acid and 1kg of zinc oxide were stirred at a rate of 600r/min for 10min to obtain a regenerant.
Preparation example 2 of regenerant: 12.5kg of N, N' - (dithiobis-2, 1-phenylene) benzamide, 6kg of N-butylmercaptan, 4kg of dithiodibenzoic acid and 1.5kg of zinc oxide were stirred at a rate of 800r/min for 15min to obtain a regenerant.
Preparation example 3 of regenerant: 15kg of N, N' - (dithiobis-2, 1-phenylene) benzamide, 7kg of N-butylmercaptan, 5kg of dithiodibenzoic acid and 2kg of zinc oxide were stirred at a rate of 1000r/min for 20min to obtain a regenerant.
Second, preparation example of reclaimed rubber
The process oil in the following preparation examples was selected from the process oils supplied by Jetta petrochemical Co., Ltd., Zhuhai, model No. JD-22.
Preparation example 1 of reclaimed rubber: taking waste tires made of natural rubber, removing steel wires and cord fabrics, and crushing the waste tires at normal temperature to obtain waste rubber powder with the fineness of 15 meshes;
secondly, stirring the waste rubber powder, the operation oil and the regenerant (selected from preparation example 1 of the regenerant) in a weight ratio of 4:2:1 at the temperature of 40 ℃ for 5min, and then soaking for 1h under the conditions that the pressure is 1.5MPa and the temperature is 140 ℃ to obtain pretreated waste rubber powder;
thirdly, the waste rubber powder is activated for 1min by microwave under the conditions that the microwave frequency is 2450MHz and the radiation power is 675W;
and fourthly, mixing the waste rubber powder for 10min at the temperature of 120 ℃ to obtain the reclaimed rubber.
Preparation example 2 of reclaimed rubber: taking waste tires made of natural rubber, removing steel wires and cord fabrics, and crushing the waste tires at normal temperature to obtain waste rubber powder with the fineness of 30 meshes;
secondly, stirring the waste rubber powder, the operation oil and the regenerant (selected from preparation example 2 of the regenerant) in a weight ratio of 5:2:1 at the temperature of 45 ℃ for 8min, and then soaking for 1.5h under the conditions that the pressure is 1.8MPa and the temperature is 150 ℃ to obtain pretreated waste rubber powder; thirdly, the waste rubber powder is activated for 1.5min by microwave under the conditions that the microwave frequency is 2450MHz and the radiation power is 675W; and fourthly, mixing the waste rubber powder for 15min at the temperature of 130 ℃ to obtain the reclaimed rubber.
Preparation example 3 of reclaimed rubber: taking waste tires made of natural rubber, removing steel wires and cord fabrics, and crushing the waste tires at normal temperature to obtain waste rubber powder with the fineness of 50 meshes;
secondly, stirring the waste rubber powder, the operation oil and the regenerant (selected from preparation example 3 of the regenerant) in a weight ratio of 6:2:1 at 50 ℃ for 10min, and then soaking for 2h under the conditions that the pressure is 2.0MPa and the temperature is 160 ℃ to obtain pretreated waste rubber powder;
thirdly, the waste rubber powder is activated for 2min by microwave under the conditions that the microwave frequency is 2450MHz and the radiation power is 675W;
and fourthly, mixing the waste rubber powder for 20min at the temperature of 140 ℃ to obtain the reclaimed rubber.
Preparation example 4: the difference between the preparation example and the preparation example 1 of the reclaimed rubber is that no reclaiming agent is added in the step II and the waste rubber powder is not treated in the step III.
Preparation example 5: the difference between the preparation example and the preparation example 1 of the reclaimed rubber is that no reclaiming agent is added in the step II.
Preparation example 6: the difference between this preparation example and the reclaimed rubber preparation example 1 is that the waste rubber powder is not subjected to the third step.
Third, example
The natural rubber in the following examples was selected from the group consisting of tabstock RSS3 produced by thailand marman; promoter CZ available from Shandong Shanshun chemical Co., Ltd; the accelerant TMTD is selected from accelerant TMTD provided by Ulin New Material science and technology GmbH; the silane coupling agent is selected from silane coupling agent Si-69 provided by Nanjing chemical industry Co.Ltd; the antifogging agent is selected from model 1956 antifogging agent provided by Shijiazhuang Chengshui chemical industry Co., Ltd; the super wear-resistant carbon black is N110 super wear-resistant carbon black provided by Tianjin optimal alliance chemical technology limited; the coumarone resin is selected from the group consisting of Doma resin with the trademark DN-88 provided by Shandong Hao Shunhu chemical Co., Ltd; the scorch retarder is selected from the scorch retarder CTP-80GE provided by Shanghai Dynasty trade company Limited.
Example 1: the rubber for the high-bearing solid tire is prepared by the following method:
preparing inner layer glue:
putting 50kg of natural rubber into an open mill, and plasticating for 5min at the temperature of 55 ℃ to obtain plasticated rubber;
kneading 90kg of plastication rubber, 90kg of reclaimed rubber (selected from preparation example 1 of reclaimed rubber), 1.0kg of zinc oxide, 0.2kg of stearic acid, 0.3kg of promoter CZ, 0.15kg of promoter TMTD, 1kg of sulfur and 1.2kg of silane coupling agent Si-69 at the temperature of 110 ℃ for 10min to obtain inner-layer dense rubber;
thirdly, putting the inner layer banburying rubber into an open mill, open milling for 15min at the temperature of 95 ℃, and obtaining the inner layer rubber after sheet discharging and cooling;
preparing a tread rubber:
130kg of reclaimed rubber (selected from preparation example 1 of reclaimed rubber), 30kg of super wear-resistant carbon black, 1.5kg of zinc oxide, 0.3kg of stearic acid, 1.5kg of coumarone resin, 0.1kg of scorch retarder and 1kg of antifogging agent are subjected to banburying at the temperature of 120 ℃ for 10min to obtain tread dense rubber compound;
and secondly, putting the tread internal mixing rubber into an open mill, open milling for 15min at the temperature of 100 ℃, and obtaining the tread rubber after sheet discharging and cooling.
Example 2: the rubber for the high-bearing solid tire is prepared by the following method:
preparing inner layer glue:
putting 55kg of natural rubber into an open mill, and plasticating for 8min at the temperature of 60 ℃ to obtain plasticated rubber;
95kg of plastication rubber and reclaimed rubber (selected from preparation example 2 of reclaimed rubber), 1.15kg of zinc oxide, 0.23kg of stearic acid, 0.34kg of promoter CZ, 0.17kg of promoter TMTD, 1.5kg of sulfur and 1.4kg of silane coupling agent Si-69 are subjected to banburying at the temperature of 115 ℃ for 12.5min to obtain inner-layer dense rubber;
thirdly, putting the inner layer banburying rubber into an open mill, open milling for 17.5min at the temperature of 100 ℃, and obtaining the inner layer rubber after sheet discharging and cooling; preparing a tread rubber:
firstly, banburying 135kg of reclaimed rubber (selected from preparation example 2 of reclaimed rubber), 35kg of super wear-resistant carbon black, 1.65kg of zinc oxide, 0.33kg of stearic acid, 1.75kg of coumarone resin, 0.15kg of scorch retarder and 1.2kg of antifogging agent at the temperature of 125 ℃ for 12.5min to obtain tread dense rubber;
and secondly, putting the tread internal mixing rubber into an open mill, open milling for 18min at the temperature of 105 ℃, and obtaining the tread rubber after sheet discharging and cooling.
Example 3: the rubber for the high-bearing solid tire is prepared by the following method:
preparing inner layer glue:
putting 60kg of natural rubber into an open mill, and plasticating for 10min at the temperature of 65 ℃ to obtain plasticated rubber;
secondly, banburying 100kg of the plastic refining rubber and the reclaimed rubber (selected from preparation example 3 of reclaimed rubber), 1.3kg of zinc oxide, 0.26kg of stearic acid, 0.38kg of promoter CZ, 0.19kg of promoter TMTD, 2kg of sulfur and 1.6kg of silane coupling agent Si-69 at the temperature of 120 ℃ for 15min to obtain inner-layer dense rubber;
thirdly, putting the inner layer banburying rubber into an open mill, open milling for 20min at the temperature of 105 ℃, and obtaining the inner layer rubber after sheet discharging and cooling; preparing a tread rubber:
firstly, banburying 140kg of reclaimed rubber (selected from preparation example 3 of reclaimed rubber), 40kg of super wear-resistant carbon black, 1.8kg of zinc oxide, 0.36kg of stearic acid, 2kg of coumarone resin, 0.2kg of scorch retarder and 1.4kg of antifogging agent at the temperature of 130 ℃ for 15min to obtain tread dense rubber compound;
and secondly, putting the tread internal mixing rubber into an open mill, open milling for 20min at the temperature of 110 ℃, and obtaining the tread rubber after sheet discharging and cooling.
Fourth, comparative example
Comparative example 1: the difference between the comparative example and the example 1 is that the reclaimed rubber is prepared by the preparation example 4 of the reclaimed rubber, in the preparation process of the reclaimed rubber, no reclaiming agent is added in the step II, and the waste rubber powder is not treated in the step III.
Comparative example 2: the difference between the comparative example and the example 1 is that the reclaimed rubber is prepared by the preparation example 4 of the reclaimed rubber, and in the preparation process of the reclaimed rubber, no reclaiming agent is added in the step II.
Comparative example 3: the difference between the comparative example and the example 1 is that the reclaimed rubber is prepared by the reclaimed rubber preparation example 4, and the reclaimed rubber powder is not processed by the step three in the reclaimed rubber preparation process.
Fifth, performance test
The properties of the rubber for a high load solid tire were measured in the following manner, and the results are shown in Table 1.
Tensile strength: the tensile strength of the tread rubber and the inner rubber is tested according to GB/T528-.
Tensile strength at definite elongation: the 100% and 300% tensile strength of the tread rubber and the inner rubber are tested according to GB/T528-.
Elongation at break: the elongation at break of the tread rubber and the inner rubber is tested according to GB/T528-.
Abrasion: the wear resistance of the tread rubber is tested according to ASTM D1630-2006 Standard test method for rubber wear resistance.
Compression set: the compression set properties of the tread rubber and the inner layer rubber were tested according to GB/T7759.1-2015 compression set of vulcanized rubber or thermoplastic rubber.
TABLE 1
As can be seen from the data in Table 1, the rubber for the solid tire prepared by the invention has excellent tensile strength, elongation at break and compression set performance; the tread rubber also has excellent wear resistance, which shows that the tire manufactured by the tread rubber and the inner layer rubber in the invention has excellent bearing capacity and wear resistance.
The reclaimed rubber in the comparative example 1 is prepared by adopting a reclaimed rubber preparation example 4, in the preparation process of the reclaimed rubber, no reclaiming agent is added in the step II, and the waste rubber powder is not treated in the step III; compared with example 1, the tensile strength, elongation at break and compression set of the tread rubber and the inner layer rubber in the comparative example 1 are obviously deteriorated, and the abrasion loss of the tread rubber is increased, which shows that the mechanical properties of the reclaimed rubber processed by the reclaiming agent in the step II and the step III are obviously improved.
The reclaimed rubber in the comparative example 2 is prepared by adopting a preparation example 4 of reclaimed rubber, and in the preparation process of the reclaimed rubber, a regenerating agent is not added in the step II; compared with example 1, the tensile strength, elongation at break and compression set of the tread rubber and the inner layer rubber in comparative example 1 are obviously deteriorated, and the abrasion loss of the tread rubber is increased, which shows that the mechanical property of the reclaimed rubber treated by the regenerant in the step II is obviously improved.
The reclaimed rubber in the comparative example 3 is prepared by the preparation example 4 of reclaimed rubber, and in the preparation process of the reclaimed rubber, waste rubber powder is not treated by the step III; compared with example 1, the tensile strength, elongation at break and compression set of the tread rubber and the inner layer rubber in the comparative example 1 are obviously poor, the abrasion loss of the tread rubber is increased, and the mechanical property of the reclaimed rubber treated by the step three is obviously improved. Compared with the example 1, the comparative example 2 and the comparative example 3, the rubber has synergistic effect when the reclaiming agent in the step II and the reclaimed rubber treated in the step III are adopted, and the mechanical property of the rubber can be obviously improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a high bears rubber for solid tyre which characterized in that: comprises inner layer rubber and tread rubber;
the inner layer rubber comprises the following components in parts by weight: 90-100 parts of reclaimed rubber, 50-60 parts of natural rubber, 1.2-1.56 parts of activating agent, 0.45-0.57 part of accelerator, 1-2 parts of sulfur and 1.2-1.6 parts of silane coupling agent;
the tread rubber comprises the following components: 140 parts of regenerated rubber 130-140 parts, 30-40 parts of super wear-resistant carbon black, 1.8-2.16 parts of activating agent, 1.5-2 parts of plasticizer, 0.1-0.2 part of anti-coking agent and 1-1.4 parts of antifogging agent;
the reclaimed rubber is prepared by adopting the following method:
taking waste tires made of natural rubber, removing steel wires and cord fabrics, and crushing the waste tires at normal temperature to obtain waste rubber powder with the fineness of 15-50 meshes;
secondly, stirring the waste rubber powder, the operation oil and the regenerant in a weight ratio of (4-6) to (2: 1) for 5-10min at the temperature of 40-50 ℃, and then soaking for 1-2h under the conditions that the pressure is 1.5-2.0MPa and the temperature is 140 ℃ and 160 ℃ to obtain pretreated waste rubber powder;
thirdly, the waste rubber powder is activated for 1-2min by microwave under the conditions that the microwave frequency is 2450MHz and the radiation power is 675W;
mixing the waste rubber powder for 10-20min at the temperature of 120-140 ℃ to obtain reclaimed rubber;
the regenerant is prepared by the following method: according to parts by weight, 10-15 parts of N, N' - (dithiobis-2, 1-phenylene) dibenzoamide, 5-7 parts of N-butyl mercaptan, 3-5 parts of dithiodibenzoic acid and 1-2 parts of zinc oxide are stirred for 10-20min at the speed of 600-1000r/min to obtain the regenerant.
2. The rubber for high load solid tire according to claim 1, characterized in that: the activator consists of zinc oxide and stearic acid in a weight ratio of 5: 1.
3. The rubber for high load solid tire according to claim 1, characterized in that: the accelerator consists of a sulfenamide accelerator and a thiuram accelerator in a weight ratio of 2: 1.
4. A high load solid tire rubber as in claim 3, wherein: the sulfenamide accelerator is accelerator CZ; the thiuram accelerator is an accelerator TMTD.
5. The rubber for high load solid tire according to claim 1, characterized in that: the plasticizer is coumarone resin.
6. The rubber for high load solid tire according to claim 1, characterized in that: the scorch retarder is N-cyclohexyl thiophthalimide.
7. The method for preparing the rubber for the high-load solid tire as claimed in claim 1, wherein the method comprises the following steps: the method comprises the following steps:
preparing inner layer glue:
50-60 parts of natural rubber are put into an open mill and plasticated for 5-10min at the temperature of 55-65 ℃ to obtain plasticated rubber;
secondly, banburying the plasticated rubber, 90-100 parts of reclaimed rubber, 1.2-1.56 parts of activating agent, 0.45-0.57 part of accelerator, 1-2 parts of sulfur and 1-1.6 parts of silane coupling agent Si-691.2-1.6 for 10-15min at the temperature of 110 ℃ and 120 ℃ to obtain inner-layer dense rubber;
thirdly, putting the inner layer banburying rubber into an open mill, open milling for 15-20min at the temperature of 95-105 ℃, taking out the inner layer banburying rubber from the mill, and cooling to obtain the inner layer rubber;
preparing a tread rubber:
firstly, banburying 140 parts of regenerated rubber 130-plus, 30-40 parts of super wear-resistant carbon black, 1.8-2.16 parts of activating agent, 1.5-2 parts of plasticizer, 0.1-0.2 part of anti-scorching agent and 1-1.4 parts of antifogging agent for 10-15min at the temperature of 120-plus 130 ℃ to obtain tread dense rubber;
secondly, putting the tread internal mixing rubber into an open mill, open milling for 15-20min at the temperature of 100-.
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| CN111196111A (en) * | 2019-10-29 | 2020-05-26 | 嘉兴智悦橡塑有限公司 | Solid plastic rubber wheel and manufacturing process thereof |
| CN111675835B (en) * | 2020-06-30 | 2023-01-31 | 重庆凌峰橡塑制品股份有限公司 | Formula of high-adhesion natural rubber |
| CN112708180B (en) * | 2020-12-23 | 2023-01-03 | 青岛学朋机械科技有限公司 | Tire and preparation process thereof |
| CN113580849B (en) * | 2021-07-09 | 2022-04-26 | 季华实验室 | Non-pneumatic tire and vehicle |
| CN116656022B (en) * | 2023-05-30 | 2024-01-02 | 荣成荣鹰橡胶制品有限公司 | Solid tire tread rubber and preparation method thereof |
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| US5686530A (en) * | 1996-03-18 | 1997-11-11 | The Goodyear Tire & Rubber Company | Tire tread compound |
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| CN101624454B (en) * | 2009-07-31 | 2011-02-16 | 杭州中策橡胶有限公司 | Sizing material utilizing tire tread rubber of reclaimed rubber, mixing method and application thereof |
| CN101696285B (en) * | 2009-09-30 | 2011-11-23 | 徐州工业职业技术学院 | New method for activating and recycling tyre waste rubber powder |
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