CN113004588B - Aircraft tire tread composition and preparation method thereof - Google Patents
Aircraft tire tread composition and preparation method thereof Download PDFInfo
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- CN113004588B CN113004588B CN202110421246.6A CN202110421246A CN113004588B CN 113004588 B CN113004588 B CN 113004588B CN 202110421246 A CN202110421246 A CN 202110421246A CN 113004588 B CN113004588 B CN 113004588B
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
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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
- B60C1/0016—Compositions of the tread
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention discloses an aircraft tire tread composition and a preparation method thereof, and relates to the technical field of aircraft tires. The aircraft tire tread composition comprises the following components in parts by weight: 60-90 parts of polyisoprene rubber and 15-60 parts of carbon black-extended styrene-butadiene rubber master batch; wherein the total parts of the styrene-butadiene rubber in the polyisoprene rubber and the carbon black-extended styrene-butadiene rubber master batch are 100 parts. The application solves the problems that the strength is slightly low, the processability is slightly poor and the like when the synthetic polyisoprene rubber is used for replacing natural rubber at present through the matching use of the polyisoprene rubber and the carbon black-filled butadiene styrene rubber master batch. The aircraft tire tread compositions prepared herein have improved wear resistance and heat buildup properties.
Description
Technical Field
The invention relates to the technical field of aircraft tires, in particular to an aircraft tire tread composition and a preparation method thereof.
Background
The tire tread is used as the only grounding component of the automobile and the airplane, and has the functions of providing the automobile or the airplane with grip, resisting scratch and abrasion of the road surface, resisting deformation of the tire and the like, different from automobile tires, the aviation tire takes off, slides and lands under the high-speed and high-load state, the performance requirements for the tread rubber of a tire are more stringent, and generally, the tread rubber is required to have higher abrasion resistance, stronger resistance to deformation and lower heat generation, these properties directly affect the service and life of aircraft tires, but often interfere with one another, such that increasing the carbon black loading to improve abrasion resistance often results in increased heating of the compound, in order to reduce the strength of the rubber material caused by the white carbon black in the heat-generating filling part, it is important to develop a high-wear-resistance and low-heat-generating aviation tire tread rubber.
In the prior aircraft tire tread technology, high-grade natural rubber is generally used as raw rubber, and part of butadiene rubber is sometimes used for improving the abrasion performance; the reinforcing fillers are based on series 1 and series 2 carbon blacks, such as N115, N220 and N234, possibly combined with small amounts of white carbon to reduce heat generation. However, natural rubber belongs to agricultural products, and the batch stability of the product is greatly influenced by natural factors such as temperature, illumination, humidity and the like, which has adverse effects on the performance and batch stability of the tread rubber. Compared with natural rubber, the synthetic polyisoprene rubber has the advantages of low heat generation, good product batch stability and the like, and the synthetic polyisoprene rubber is used for replacing the natural rubber in the patent technology, so that the problem of poor batch stability caused by using high-grade natural rubber is well solved, but the synthetic polyisoprene rubber has slightly low strength and poor processability, such as poor stiffness of an extruded tread and easy warping; the main idea is to increase the strength of the compound by increasing the amount of filler, but the fine particle carbon black with good reinforcement will cause a decrease in strength and an increase in heat generation due to poor dispersion while increasing the amount.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects of the prior art and provide an aircraft tire tread composition and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an aircraft tire tread composition comprises the following components in parts by weight: 60-90 parts of polyisoprene rubber and 15-60 parts of carbon black-extended styrene-butadiene rubber master batch; wherein the total parts of the styrene-butadiene rubber in the polyisoprene rubber and the carbon black-extended styrene-butadiene rubber master batch are 100 parts.
The application solves the problems that the strength is slightly low, the processability is slightly poor and the like when the synthetic polyisoprene rubber replaces high-grade natural rubber at present through the matching use of the polyisoprene rubber and the carbon black-filled butadiene styrene rubber master batch. The polyisoprene rubber is used as a main raw material, and compared with high-grade natural rubber, the polyisoprene rubber has better batch stability and better molecule flexibility than natural rubber, so that the dynamic heat generation is lower; meanwhile, part of the carbon black-extended styrene-butadiene rubber master batch prepared by a wet method is added, and the improved carbon black dispersion can further reduce the heat generation of the composition and improve the wear resistance.
Preferably, the preparation method of the carbon black-extended styrene-butadiene rubber master batch comprises the following steps: (1) preparing materials: the formula comprises the following components in parts by weight: styrene-butadiene latex: 100 parts (based on dry glue); carbon black: 50 parts of a mixture; water: 1500-3000 parts; operating oil: 0-30 parts of a solvent; coating agent: 1-5 parts; coagulant: 1-5 parts; (2) preparation of the carbon black suspension: adding carbon black into a reaction kettle, adding part of water to adjust the concentration of the carbon black to 2-5 wt%, and stirring at a high speed for dispersing to obtain a carbon black suspension; (3) mixing and heat treatment of latex and carbon black: adding styrene-butadiene latex into the carbon black suspension under the condition of stirring at normal temperature, uniformly mixing to obtain a latex/carbon black mixed system, and adding water to ensure that the total content of solids in the latex/carbon black mixed system is 3-5 wt%; then heating the reaction kettle to 70-90 ℃, adding a hot water suspension of a coating agent with the mass concentration of 1%, and continuously stirring for 10-15 minutes to obtain a heat-treated latex/carbon black mixed system; (4) and (3) coagulation treatment: adding a measured coagulant aqueous solution with the mass concentration of 20% into the latex/carbon black mixed system after the heat treatment under stirring to generate coagulation coprecipitation, precipitating coagulants in a powdery shape, continuously stirring and keeping the temperature at 70-90 ℃, if the formula contains the operation oil, adding the operation oil under stirring, and continuously stirring for 10-15 minutes; (5) post-treatment of the agglomerates: filtering the coagulated product through filter cloth to obtain a wet particle product, washing the wet particle product for three to four times by using water, dehydrating, and drying the obtained wet particle product in an air-blast drying oven at the temperature of 80-90 ℃ until the moisture content is below 1 percent to obtain the carbon black-filled styrene-butadiene rubber master batch.
Preferably, the content of cis 1, 4-polyisoprene in the polyisoprene rubber is more than 95%, the Mooney viscosity is 65-90MU, and the molecular weight distribution index is 1.9-3.0. In order to obtain the aircraft tire tread composition provided herein, the properties of the polyisoprene rubber used need to meet the requirements set forth above.
Preferably, the polyisoprene rubber is purchased from Russia and is at least one of SKI-5PM, SKI-3 and SKI-3S; the polyisoprene rubber can also be prepared by the preparation method of the invention patent application No. 201810353778.9.
Preferably, the aircraft tire tread composition comprises the following components in parts by weight: 80-90 parts of polyisoprene rubber and 15-30 parts of carbon black-extended styrene-butadiene rubber master batch. Further preferably, the aircraft tire tread composition comprises the following components in parts by weight: 80 parts of polyisoprene rubber and 30 parts of carbon black-extended styrene-butadiene rubber master batch. Through a large amount of experimental researches, the inventor of the application finds that when the polyisoprene rubber and the carbon black-filled styrene-butadiene rubber master batch are matched and used, and the selection of the weight parts is adopted, the performance of the obtained tire tread composition is better.
Preferably, the aircraft tire tread composition further comprises the following components in parts by weight: 30-50 parts of reinforcing filler. In the tire tread composition, the total carbon black has a large influence on the overall performance of the aircraft tire tread composition, and when the total carbon black is 45-55 parts, the overall performance of the aircraft tire tread composition is better; the application mainly aims to explore the influence of the matching use of the polyisoprene rubber and the carbon black-filled styrene-butadiene rubber master batch on the aircraft tire tread composition and solve the problem of poor performance when the polyisoprene rubber is used alone.
Preferably, the aircraft tire tread composition further comprises the following components in parts by weight: 1-5 parts of an active agent, 0.1-0.5 part of a processing aid, 1-6 parts of a protective system, 1-10 parts of process oil, 1-5 parts of tackifying resin, 0.2-2 parts of a multifunctional cross-linking agent, 1-3 parts of an anti-vulcanization reversion agent, 1-3 parts of an accelerator and 1-3 parts of sulfur. The multifunctional cross-linking agent is used, can be used as a sulfur donor and released in the vulcanization process, and has a special molecular structure, so that the proportion of single/double sulfur bonds and multiple sulfur bonds of natural rubber and styrene butadiene rubber can be flexibly regulated and controlled after the cross-linking agent is added, the heat generation of the composition is further reduced, and the abrasion performance is improved.
Preferably, the aircraft tire tread composition is at least one of the following (a) - (i):
(a) the reinforcing filler is at least one of carbon black N115, carbon black N220 and carbon black N234;
(b) the active agent comprises zinc oxide and stearic acid;
(c) the processing aid is a thiophenol peptizer;
(d) the protective system is at least one of p-phenylenediamine anti-aging agents, quinoline anti-aging agents and protective wax;
(e) the operating oil is at least one of TDAE oil, MES oil and RAE oil;
(f) the tackifying resin is at least one of C5 resin, C9 resin and terpene resin;
(g) the multifunctional cross-linking agent is an aromatic compound containing sulfur and nitrogen elements;
(h) the anti-reversion agent is 1, 3-bis (citraconimidomethyl) benzene;
(i) the accelerator is at least one of sulfenamide accelerator and thiuram accelerator.
Further preferably, the process oil is TDAE oil; the tackifying resin is a C5 resin.
The application also provides a preparation method of the aircraft tire tread composition, which comprises the following steps:
(i) adding a processing aid to plasticate the polyisoprene rubber; obtaining the plasticated polyisoprene rubber;
(ii) mixing a reinforcing filler, an active agent, a protection system, operating oil, tackifying resin, plasticated polyisoprene rubber and carbon black-filled butadiene styrene rubber master batch to obtain a master batch;
(iii) and (3) adding a multifunctional cross-linking agent, an anti-reversion agent, an accelerator and sulfur into the master batch prepared in the step (ii), and carrying out final mixing to obtain the aircraft tire tread composition.
Preferably, in the step (i), the plastication time is 180-210 s, the rubber discharge temperature of an internal mixer is not more than 155 ℃, and the obtained plasticated polyisoprene rubber can be placed for more than 2h for the next step; in the step (ii), a forward mixing method or a reverse mixing method is adopted for mixing, the mixing time is 240-300 s, and the mixing temperature is not more than 160 ℃; in the step (iii), the mixing time of the final mixing section is 150-180 s, and the mixing temperature is not more than 105 ℃.
Compared with the prior art, the invention has the beneficial effects that: (1) the batch stability of the adopted synthetic polyisoprene rubber product is better; and synthetic polyisoprene has lower dynamic heat generation than natural rubber. (2) The styrene butadiene rubber in the carbon black-filled styrene butadiene rubber master batch not only can improve the abrasion performance of the rubber material, but also can improve the processing performance of the rubber material theoretically and improve the stiffness and the dimensional stability of the semi-finished parts of the tire tread. (3) The multifunctional cross-linking agent can flexibly adjust the type of a cross-linking bond, reduce the heat generation of rubber materials and improve the abrasion performance.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Unless otherwise indicated, various processes and methods of the present application in the following comparative examples and examples, which are not described in detail, are conventional and well known to those skilled in the art, and materials used in the following examples, unless otherwise specified, are commercially available.
The polyisoprene rubber used in the embodiments 1-5 of the present application is at least one selected from the group consisting of Russia, SKI-5PM, SKI-3 and SKI-3S.
The preparation method of the carbon black-extended styrene-butadiene rubber master batch is prepared by a wet mixing method, namely, carbon black is uniformly dispersed in water or other media through high-speed mechanical stirring, and then the carbon black is mixed with styrene-butadiene latex and coagulated to obtain the wet-process rubber.
The preparation method of the carbon black-extended styrene-butadiene rubber masterbatch used in embodiments 1 to 5 of the present application is prepared by the preparation method mentioned in embodiment 1 of the invention patent application No. 201410337186, and specifically comprises the following steps: (1) preparing materials: the formula comprises the following components in parts by weight: styrene-butadiene latex: 300 g (S1502 (dry glue) by dry glue amount); carbon black (N234): 150 g; water: 5000 g; operating oil: 0 g; coating agent: 9 g; coagulant: 3 g of the total weight of the mixture; (2) preparation of the carbon black suspension: adding carbon black into a reaction kettle, adding part of water to adjust the concentration of the carbon black to 2-5 wt%, and stirring at a high speed for dispersing to obtain a carbon black suspension; (3) mixing and heat treatment of latex and carbon black: adding styrene-butadiene latex into the carbon black suspension under the condition of stirring at normal temperature, uniformly mixing to obtain a latex/carbon black mixed system, and adding water to ensure that the total content of solids in the latex/carbon black mixed system is 3-5 wt%; then heating the reaction kettle to 70-90 ℃, adding a hot water suspension of a coating agent with the mass concentration of 1%, and continuously stirring for 10-15 minutes to obtain a heat-treated latex/carbon black mixed system; (4) and (3) coagulation treatment: adding a measured coagulant aqueous solution with the mass concentration of 20% into the latex/carbon black mixed system after the heat treatment under stirring to generate coagulation coprecipitation, precipitating coagulants in a powdery shape, continuously stirring and keeping the temperature at 70-90 ℃, if the formula contains the operation oil, adding the operation oil under stirring, and continuously stirring for 10-15 minutes; (5) post-treatment of the agglomerates: and filtering the coagulated product after coagulation treatment by using filter cloth to obtain a wet particle product, washing the wet particle product for three to four times by using water, dehydrating, and drying the obtained wet particle product in a forced air drying oven at the temperature of 80-90 ℃ until the moisture content is below 1 percent to obtain the carbon black-filled styrene-butadiene rubber master batch. This application is owing to the essential component be butadiene styrene rubber and carbon black, and the weight ratio of butadiene styrene rubber and carbon black is among this application acquiescence carbon black-filled butadiene styrene rubber masterbatch: styrene-butadiene rubber: carbon black 2: 1. When the total parts of the styrene butadiene rubber and the carbon black are calculated, the rest components in the carbon black-extended styrene butadiene rubber master batch are not considered.
A plurality of preparation methods of the carbon black-filled styrene-butadiene rubber masterbatch are selected in the actual preparation process of the application, but only one method is listed here for highlighting the effect of the patent, and the rest methods are not repeated.
The present application sets examples 1 to 5, the selection of the components and the parts by weight of the specific examples 1 to 5 are shown in table 1, and the total amount of carbon black in the tire tread formula has a great influence on the performance, so that the present application, when studying the influence of the use of the polyisoprene rubber and the carbon black-filled styrene-butadiene rubber master rubber on the tire tread, limits the carbon black part to 52 parts, and on the premise that the total amount of carbon black between the examples and the comparative examples is not very different, studies the influence of the cooperation of the polyisoprene rubber and the carbon black-filled styrene-butadiene rubber master rubber and the whole formula on the tire tread performance, only studies the influence of the carbon black part at 52 parts of the polyisoprene rubber and the carbon black-filled styrene-butadiene rubber master rubber and the whole formula on the tire tread performance, because the influence of the carbon black part on the tire tread performance is common knowledge, the study of the performances of the rest of the carbon black part is not carried out, similar to the present application, the research results are not repeated herein:
TABLE 1 selection of Components and parts by weight of examples 1-5
The preparation method of the aircraft tire tread composition comprises the following steps:
(i) adding a processing aid to plasticate the polyisoprene rubber; obtaining the plasticated polyisoprene rubber; wherein the plasticating time is 180-210 s, the rubber discharge temperature of the internal mixer is not more than 155 ℃, and the plasticated polyisoprene rubber can be placed for more than 2h for the next step;
(ii) mixing a reinforcing filler, an active agent, a protection system, operating oil, tackifying resin, plasticated polyisoprene rubber and carbon black-filled butadiene styrene rubber master batch to obtain a master batch; the mixing adopts a reverse-order mixing method, namely 2/3 carbon black, crude rubber and small materials are added for mixing for a period of time, then the rest carbon black and oil are added, the mixing time is 240-300 s, the rubber discharging temperature of an internal mixer is not more than 160 ℃, and in order to ensure that the rubber materials are uniformly mixed, 2 times of actions of rising a top plug are additionally added in the mixing process;
(iii) and (3) adding a multifunctional cross-linking agent, an anti-vulcanization reversion agent, an accelerator and sulfur into the master batch prepared in the step (ii), and carrying out final mixing for 150-180 s at a mixing temperature of not more than 105 ℃ to obtain the aircraft tire tread composition.
Meanwhile, the application sets comparative examples, and specific comparative examples are set as follows, wherein comparative examples 3 to 4 are compared with example 5 under the condition that the same content of carbon black is ensured:
comparative example 1 polyisoprene rubber 0 part, the black-filled styrene-butadiene rubber masterbatch 0 part, contain 100 parts of natural rubber (No. 1 smoked sheet rubber), the other components, weight share and preparation method are completely the same as example 5;
comparative example 2 polyisoprene rubber 100, carbon black-extended styrene-butadiene rubber masterbatch 0, the other components, weight portions and preparation method are completely the same as example 5;
comparative example 3 polyisoprene rubber 50 parts, carbon black-extended styrene-butadiene rubber masterbatch 75 parts, carbon black N23427 parts, the rest components, parts by weight and preparation method are completely the same as example 5;
comparative example 4 polyisoprene rubber 95 parts, carbon black-extended styrene-butadiene rubber masterbatch 7.5 parts, carbon black N23449.5 parts of the rest components, parts by weight and preparation method are completely the same as example 5;
comparative example 5 did not contain the multifunctional crosslinking agent, and the remaining components, parts by weight and preparation method were exactly the same as those of example 5.
The rubber compositions of comparative examples 1 to 5 and examples 1 to 5 were prepared by the above-mentioned kneading method, left for more than 16 hours, and vulcanized at a temperature of 145 ℃ and the vulcanization time of the sample pieces for testing tensile properties was (t90+5min) and the vulcanization time of the sample pieces for testing abrasion resistance and dynamic heat buildup was (t90+10) min. The tensile strength is measured according to the national standard method; the wear resistance is measured by an Akron wear tester according to the method of national standard GB/T1689-; the dynamic heat generation was measured by a compression heat generation tester in accordance with the method of GB/T1687.3-2016, and the test specimens were cylindrical test specimens having a diameter of 17.8mm and a height of 25 mm.
The properties of comparative examples 1 to 5 and examples 1 to 5 are shown in Table 2, and the larger the value, the better the properties, with the reference value of 100 being the property of comparative example 1:
TABLE 2 results of performance test of examples and comparative examples
As can be seen from Table 2, from comparison of data 1 of comparative example 1 and comparative example 2 with the difference in properties between natural rubber and polyisoprene rubber, it can be seen that the polyisoprene rubber is inferior in tensile strength and abrasion resistance to natural rubber and is lower in dynamic heat generation than natural rubber, in agreement with the theory.
The aircraft tire tread compositions prepared in examples 1-5 have greatly improved performance over the aircraft tire tread composition prepared in comparative example 2 using only polyisoprene rubber, and solve the problems of replacing natural rubber with synthetic polyisoprene rubber as noted in the background art. Meanwhile, the aircraft tire tread composition prepared in example 5 has the best performance in all aspects; comparative examples 3 and 4 polyisoprene rubber and carbon black extended styrene butadiene rubber masterbatches were outside the ranges provided in this application and from the results, the effect was much less despite the same total carbon black amount. Comparative example 5 in comparison with example 5, it was found that comparative example 5, which does not contain a multifunctional crosslinking agent, has significantly reduced effects of dynamic heat generation and abrasion resistance compared to the aircraft tire tread composition prepared in example 5.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The aircraft tire tread composition is characterized by comprising the following components in parts by weight: 60-90 parts of polyisoprene rubber, 15-60 parts of carbon black-extended styrene-butadiene rubber master batch and 30-50 parts of reinforcing filler; wherein the total parts of the styrene-butadiene rubber in the polyisoprene rubber and the carbon black-extended styrene-butadiene rubber master batch are 100 parts;
the content of cis 1, 4-polyisoprene in the polyisoprene rubber is more than 95 percent, the Mooney viscosity is 65-90MU, and the molecular weight distribution index is 1.9-3.0; the reinforcing filler is at least one of carbon black N115, carbon black N220 and carbon black N234; the total carbon black amount is 45-55 parts;
the preparation method of the carbon black-extended styrene-butadiene rubber master batch comprises the following steps: (1) preparing materials: the formula comprises the following components in parts by weight: styrene-butadiene latex: 100 parts by dry glue amount; carbon black: 50 parts of a mixture; water: 1500-3000 parts; operating oil: 0-30 parts of a solvent; coating agent: 1-5 parts; coagulant: 1-5 parts; (2) preparation of the carbon black suspension: adding carbon black into a reaction kettle, adding part of water to adjust the concentration of the carbon black to 2-5 wt%, and stirring at a high speed for dispersing to obtain a carbon black suspension; (3) mixing and heat treatment of latex and carbon black: adding styrene-butadiene latex into the carbon black suspension under the condition of stirring at normal temperature, uniformly mixing to obtain a latex/carbon black mixed system, and adding water to ensure that the total content of solids in the latex/carbon black mixed system is 3-5 wt%; then heating the reaction kettle to 70-90 ℃, adding a hot water suspension of a coating agent with the mass concentration of 1%, and continuously stirring for 10-15 minutes to obtain a heat-treated latex/carbon black mixed system; (4) and (3) coagulation treatment: adding a measured coagulant aqueous solution with the mass concentration of 20% into the latex/carbon black mixed system after the heat treatment under stirring to generate coagulation coprecipitation, precipitating coagulants in a powdery shape, continuously stirring and keeping the temperature at 70-90 ℃, if the formula contains the operation oil, adding the operation oil under stirring, and continuously stirring for 10-15 minutes; (5) post-treatment of the agglomerates: filtering the coagulated product through filter cloth to obtain a wet particle product, washing the wet particle product for three to four times with water, dehydrating, and drying the obtained wet particle product in a forced air drying oven at the temperature of 80-90 ℃ until the moisture content is below 1 percent to obtain the carbon black-filled styrene-butadiene rubber master batch; wherein the weight ratio of the styrene-butadiene rubber and the carbon black in the carbon black-extended styrene-butadiene rubber master batch is as follows: styrene-butadiene rubber: carbon black 2: 1; when the total parts of the styrene butadiene rubber and the carbon black are calculated, the rest components in the carbon black-extended styrene butadiene rubber master batch are not considered.
2. The aircraft tire tread composition of claim 1 comprising the following components in parts by weight: 80-90 parts of polyisoprene rubber and 15-30 parts of carbon black-extended styrene-butadiene rubber master batch.
3. The aircraft tire tread composition of claim 2 comprising the following components in parts by weight: 80 parts of polyisoprene rubber and 30 parts of carbon black-extended styrene-butadiene rubber master batch.
4. The aircraft tire tread composition of claim 3 further comprising the following components in parts by weight: 1-5 parts of an active agent, 0.1-0.5 part of a processing aid, 1-6 parts of a protective system, 1-10 parts of an operating oil, 1-5 parts of a tackifying resin, 0.2-2 parts of a multifunctional cross-linking agent, 1-3 parts of an anti-vulcanization reversion agent, 1-3 parts of an accelerator and 1-3 parts of sulfur.
5. The aircraft tire tread composition of claim 4 wherein at least one of the following (a) - (h):
(a) the active agent comprises zinc oxide and stearic acid;
(b) the processing aid is a thiophenol peptizer;
(c) the protective system is at least one of p-phenylenediamine anti-aging agents, quinoline anti-aging agents and protective wax;
(d) the operating oil is at least one of TDAE oil, MES oil and RAE oil;
(e) the tackifying resin is at least one of C5 resin, C9 resin and terpene resin;
(f) the multifunctional cross-linking agent is an aromatic compound containing sulfur and nitrogen elements;
(g) the anti-reversion agent is 1, 3-bis (citraconimidomethyl) benzene;
(h) the accelerator is at least one of sulfenamide accelerator and thiuram accelerator.
6. A method of preparing an aircraft tire tread composition as claimed in any one of claims 4 to 5, comprising the steps of:
(i) adding a processing aid to plasticate the polyisoprene rubber; obtaining the plasticated polyisoprene rubber;
(ii) mixing a reinforcing filler, an active agent, a protection system, operating oil, tackifying resin, plasticated polyisoprene rubber and carbon black-filled butadiene styrene rubber master batch to obtain a master batch;
(iii) and (3) adding a multifunctional cross-linking agent, an anti-reversion agent, an accelerator and sulfur into the master batch prepared in the step (ii), and carrying out final mixing to obtain the aircraft tire tread composition.
7. The preparation method of the aircraft tire tread composition as claimed in claim 6, wherein in the step (i), the plastication time is 180-210 s, the rubber discharge temperature of an internal mixer is not more than 155 ℃, and the obtained plasticated polyisoprene rubber can be used for the next step after being parked for more than 2 h; in the step (ii), a forward mixing method or a reverse mixing method is adopted for mixing, the mixing time is 240-300 s, and the mixing temperature is not more than 160 ℃; in the step (iii), the mixing time of the final mixing section is 150-180 s, and the mixing temperature is not more than 105 ℃.
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| CN115197484B (en) * | 2022-09-16 | 2022-11-29 | 广东粤港澳大湾区黄埔材料研究院 | Aircraft tire part adhesive and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104211837A (en) * | 2014-07-15 | 2014-12-17 | 华南理工大学 | Preparation method of carbon-black-containing butadiene styrene rubber master batch |
| CN107417999A (en) * | 2017-05-27 | 2017-12-01 | 山东玲珑轮胎股份有限公司 | Tread rubber composition with low tire rolling resistance |
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2021
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| CN104211837A (en) * | 2014-07-15 | 2014-12-17 | 华南理工大学 | Preparation method of carbon-black-containing butadiene styrene rubber master batch |
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| CN113004588A (en) | 2021-06-22 |
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