CN109575372B - Ultra-low rolling resistance all-steel radial tire tread rubber composition - Google Patents
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- 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
- C08J2307/00—Characterised by the use of natural rubber
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- 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
- C08J2407/00—Characterised by the use of natural rubber
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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
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/06—Copolymers with styrene
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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
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- 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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- 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
- C08K3/02—Elements
- C08K3/04—Carbon
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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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3437—Six-membered rings condensed with carbocyclic rings
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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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
Abstract
The invention relates to the technical field of tire rubber, in particular to an all-steel radial tire tread rubber composition with ultralow rolling resistance, which is characterized in that: the rubber material is prepared from, by weight, 65-70 parts of natural rubber, 50-60 parts of wet-process mixed natural rubber, 20-30 parts of reinforcing filler, 5-10 parts of silane coupling agent, 1-5 parts of plasticizer, 5-10 parts of activator, 2-6 parts of anti-aging agent, 1-5 parts of vulcanizing agent and 2-5 parts of vulcanization accelerator. According to the invention, the wet-process mixing natural rubber is used for replacing part of natural rubber and part of white carbon black, and the white carbon black is uniformly dispersed in the natural rubber by the wet process, so that the Mooney viscosity of the formula can be effectively reduced, the problem of poor Mooney processability of a high white carbon black formula is solved, and meanwhile, the dispersibility of the filler in the formula is increased. The tread rubber composition produced by the formula can greatly reduce the rolling resistance of the tire tread and obtain a tire product with A-level rolling resistance.
Description
Technical Field
The invention relates to the technical field of tire rubber, in particular to an all-steel radial tire tread rubber composition with ultralow rolling resistance.
Background
As is well known, with the continuous deepening of people's understanding of environmental protection, the requirement for low carbon emission is higher and higher, the reduction of energy consumption of automobiles is the key of energy conservation and emission reduction of automobiles, the research on green and low carbon emission tire products is a hot spot of attention and research in the current tire industry, and the reduction of tire rolling resistance plays a crucial role in achieving the goal. The tread rubber has the greatest contribution to reducing the rolling resistance of the tire, and the tread is a component which is directly contacted with the ground in the running process of the tire, so that the hysteresis loss of the tread is reduced, and the rolling resistance of the tire can be effectively reduced. The white carbon black and the latex are applied to the production of rubber products through a wet process technology, so that the dispersion performance between the white carbon black and the rubber in a formula can be effectively improved, the hysteresis loss of the rubber material is reduced, and the heat generation is reduced. The application of the wet rubber to develop a new tread rubber formula is a research hotspot of some scientific research institutions and tire enterprises. Patent CN102153765A provides a method for preparing a rubber wet master batch, which contains a filler material, wherein the filler material is uniformly dispersed in the rubber. In patent CN102219913A, the inventors used the wet-process rubber for making unvulcanized rubber compositions, and measured that the heat build-up of the vulcanized rubber compositions was improved by up to 20% as compared with the comparative examples. Patent CN102356120A proposes a method for preparing a rubber wet master batch containing carbon black filler, a rubber composition formed by using the master batch and a tire manufactured by using the master batch, and as a result, the wet technology is found to improve the dispersion of carbon black in rubber and improve the properties of the tire, such as strength, abrasion resistance, heat generation and the like. However, no reports have been made on the development of tread formulations for rolling-resistant tires of class A using wet mixes.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a tread rubber composition of an ultra-low rolling resistance all-steel radial tire, develops a rubber composition suitable for the tread of the all-steel radial tire by using wet-process mixing natural rubber added with white carbon black, and can make the rolling resistance level reach A level by using the tire manufactured by using the rubber composition.
The technical scheme adopted by the invention for solving the technical problems is as follows: an all-steel radial tire tread rubber composition with ultralow rolling resistance is characterized in that: the rubber material is prepared from, by weight, 65-70 parts of natural rubber, 50-60 parts of wet-process mixed natural rubber, 20-30 parts of reinforcing filler, 5-10 parts of silane coupling agent, 1-5 parts of plasticizer, 5-10 parts of activator, 2-6 parts of anti-aging agent, 1-5 parts of vulcanizing agent and 2-5 parts of vulcanization accelerator.
The mass portion of the white carbon black effective component filled in the wet mixing natural rubber is 42% +/-2%.
The reinforcing filler is a mixture of 10-15 parts by weight of precipitation-method high-dispersion white carbon black and 10-15 parts by weight of high-wear-resistant carbon black, and the CTAB value of the high-dispersion white carbon black is greater than 150m2/g。
The silane coupling agent is a mixture of silane X50S, silane X50S, 50% of bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide and 50% of N330 carbon black in percentage by weight.
The plasticizer is paraffin and microcrystalline wax, and the weight ratio of the dosage is 1: 2.
The active agents are zinc oxide and stearic acid.
The anti-aging agent is a mixture of anti-aging agent 4020, anti-aging agent RD and anti-aging agent DTPD.
The vulcanizing agent is sulfur with 80 percent of effective content granulated by styrene butadiene rubber.
The vulcanization accelerator is styrene butadiene rubber granulation DPG and granulation NS with the effective content of 80%.
The invention has the beneficial effects that the wet-process mixing natural rubber is used for replacing partial natural rubber and partial white carbon black, the white carbon black is uniformly dispersed in the natural rubber by the wet process, and then is mixed and banburied with other fillers by the dry process, so that the dispersion among the fillers can be effectively improved, the Mooney viscosity of the formula can be effectively reduced, the problem of poor Mooney processability of the high-white carbon black formula is solved, and the dispersibility of the fillers in the formula is increased. The tread rubber composition produced by the formula can greatly reduce the rolling resistance of the tire tread and obtain a tire product with A-level rolling resistance.
Detailed Description
The mixing process of the tread rubber composition of the present invention is as follows, and the composition formulation is shown in Table 1.
The comparative example and the examples 1, 2 and 3 adopt a low-temperature one-step rubber mixing process of a series internal mixer and feed; adding natural rubber, wet rubber, auxiliary agent small material and high-dispersion white carbon black into an upper internal mixer, closing a charging door, adding automatic weighing carbon black, carrying out internal mixing at the speed of 40-45 r/min for 30-45 s, extracting bolt, adding zinc oxide, carrying out bolt pressing and mixing, keeping constant temperature at 140-145 ℃ at the speed of 5-30 r/min for 90s of mixing, discharging to a lower internal mixer, carrying out constant temperature at 135-140 ℃ for 160s of mixing in the lower internal mixer, discharging rubber to open mixing, adding a vulcanizing agent and an accelerant in a vulcanizing open mixer, uniformly mixing, and cooling to obtain the rubber.
The natural rubber is standard rubber SMR 20# and STR 20 #. The preparation method of the wet-process mixed natural rubber is disclosed in patent CN 108070180A. The effective ingredient (mass fraction) of the white carbon black filled in the wet-method mixing natural rubber is 42% +/-2%. The reinforcing filler is a mixture of 10-15 parts of precipitation-method high-dispersion white carbon black Zeosil 1165 MP produced by Solvay company and 10-15 parts of high-wear-resistance carbon black Corax HP130 produced by orion company, and the CTAB value of the high-dispersion white carbon black is more than 150m 2/g. The silane coupling agent was X50S, and silane X50S was a mixture of 50% bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide and 50% N330 carbon black. The plasticizer is paraffin and microcrystalline wax with the dosage ratio of 1: 2. The active agents are zinc oxide and stearic acid.
Preferably, the anti-aging agent is a mixture of anti-aging agent 4020, anti-aging agent RD and anti-aging agent DTPD. The vulcanizing agent is sulfur granulated by styrene butadiene rubber with the effective content of 80 percent. The vulcanization accelerator is styrene butadiene rubber granulation DPG and granulation NS with the effective content of 80 percent.
TABLE 1
And (3) testing the physical properties of the composition: the above composition was vulcanized at 150 ℃ for 30min to obtain a vulcanized specimen and a rebound sample, and the following tests were carried out, the results of which are shown in the following table:
TABLE 2
Manufacturing of the tire: the tire specification is 315/80R22.5, the tread rubber compositions of the above examples 1 and 2 and the comparative example are respectively applied, hot feeding is carried out through an open mill to a three-compound extruder, a tread semi-finished product is extruded, the tread semi-finished product and other components are molded in a three-drum molding machine, a finished tire is obtained after tire blank vulcanization, and the finished tire is subjected to fur cutting, edge removing, appearance, dynamic balance and X-ray detection after vulcanization and is used for rolling resistance test after being qualified.
And (3) rolling resistance test: the rolling resistance test standard is GB/T18861-2002, and the rolling resistance coefficients and the rolling resistance grades obtained by the force measuring method are shown in Table 3 (European Union tire labeling method stipulates C3 type tires, RRC is less than or equal to 4.0 and is A grade).
TABLE 3
Claims (7)
1. An all-steel radial tire tread rubber composition with ultralow rolling resistance is characterized in that: the rubber reinforcing filler is prepared from the following raw materials, by weight, 65-70 parts of natural rubber, 50-56 parts of wet-process mixed natural rubber, 20-30 parts of reinforcing filler, 5-10 parts of silane coupling agent, 1-5 parts of plasticizer, 5-10 parts of activator, 2-6 parts of anti-aging agent, 1-5 parts of vulcanizing agent and 2-5 parts of vulcanization accelerator; the mass part of the white carbon black effective component filled in the wet mixing natural rubber is 42% +/-2%; the reinforcing filler is a mixture of 10-15 parts by weight of precipitation-method high-dispersion white carbon black and 10-15 parts by weight of high-wear-resistant carbon black, and the CTAB value of the high-dispersion white carbon black is greater than 150m2/g。
2. The ultra-low rolling resistance all steel radial tire tread rubber composition as in claim 1, wherein said silane coupling agent is silane X50S, silane X50S is a mixture of 50% by weight of bis- [ γ - (triethoxysilyl) propyl ] tetrasulfide and 50% by weight of N330 carbon black.
3. The ultra-low rolling resistance all-steel radial tire tread rubber composition as claimed in claim 1, wherein the plasticizer is paraffin wax and microcrystalline wax, and the dosage weight ratio is 1: 2.
4. The ultra-low rolling resistance all steel radial tire tread rubber composition of claim 1, wherein said activator is zinc oxide and stearic acid.
5. The ultra-low rolling resistance all steel radial tire tread rubber composition as claimed in claim 1, wherein the anti-aging agent is a mixture of anti-aging agent 4020, anti-aging agent RD and anti-aging agent DTPD.
6. The ultra-low rolling resistance all-steel radial tire tread rubber composition according to claim 1, wherein the vulcanizing agent is sulfur pelletized with 80% of styrene-butadiene rubber in effective content.
7. The ultra-low rolling resistance all-steel radial tire tread rubber composition as claimed in claim 1, wherein said vulcanization accelerator is styrene-butadiene rubber (DPG) and NS in an effective amount of 80%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110305374A (en) * | 2019-07-22 | 2019-10-08 | 三角轮胎股份有限公司 | Low rolling hinders all-steel radial tyre tread rubber composition |
| CN111393723A (en) * | 2020-05-28 | 2020-07-10 | 江苏通用科技股份有限公司 | All-steel driving tire tread rubber and preparation method thereof |
| CN114891280A (en) * | 2022-04-13 | 2022-08-12 | 青岛中科华瑞纳科技有限公司 | Superstrong tear-resistant rubber composition for crawler belt body |
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| JP2006213804A (en) * | 2005-02-03 | 2006-08-17 | Bridgestone Corp | Rubber composition |
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| CN102356120A (en) * | 2009-03-16 | 2012-02-15 | 株式会社普利司通 | Process for producing rubber-wet masterbatch, rubber composition, and tire |
| CN102775650A (en) * | 2012-08-09 | 2012-11-14 | 杭州中策橡胶有限公司 | Tread rubber sizing material containing liquid phase dispersion white carbon black latex mixture and preparation method and application thereof |
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- 2018-11-22 CN CN201811398529.8A patent/CN109575372B/en active Active
Patent Citations (7)
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| JP2004099625A (en) * | 2001-07-27 | 2004-04-02 | Bridgestone Corp | Natural rubber masterbatch and its manufacturing method |
| JP2006213804A (en) * | 2005-02-03 | 2006-08-17 | Bridgestone Corp | Rubber composition |
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