CN107177061B - Shock insulation rubber support protection rubber composition with anti-aging performance - Google Patents
Shock insulation rubber support protection rubber composition with anti-aging performance Download PDFInfo
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 79
- 239000005060 rubber Substances 0.000 title claims abstract description 79
- 239000000203 mixture Substances 0.000 title claims abstract description 44
- 230000003712 anti-aging effect Effects 0.000 title claims abstract description 29
- 238000009413 insulation Methods 0.000 title claims abstract description 10
- 230000035939 shock Effects 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003063 flame retardant Substances 0.000 claims abstract description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 12
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 7
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 7
- 229920001194 natural rubber Polymers 0.000 claims abstract description 7
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 6
- 239000013543 active substance Substances 0.000 claims abstract description 6
- 239000004014 plasticizer Substances 0.000 claims abstract description 6
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims description 18
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 10
- 239000005011 phenolic resin Substances 0.000 claims description 10
- -1 alkyl phenolic resin Chemical compound 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical group CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 5
- ZRMMVODKVLXCBB-UHFFFAOYSA-N 1-n-cyclohexyl-4-n-phenylbenzene-1,4-diamine Chemical compound C1CCCCC1NC(C=C1)=CC=C1NC1=CC=CC=C1 ZRMMVODKVLXCBB-UHFFFAOYSA-N 0.000 claims description 4
- AHTUGIHOEPIEAY-UHFFFAOYSA-N 4-naphthalen-1-yliminobutan-2-ol Chemical compound C1=CC=C2C(N=CCC(O)C)=CC=CC2=C1 AHTUGIHOEPIEAY-UHFFFAOYSA-N 0.000 claims description 4
- CXSJGNHRBWJXEA-UHFFFAOYSA-N 5,12-dihydrophthalazino[3,2-b]phthalazine-7,14-dione Chemical compound C1C2=CC=CC=C2C(=O)N2N1C(=O)C1=CC=CC=C1C2 CXSJGNHRBWJXEA-UHFFFAOYSA-N 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims 5
- 239000000126 substance Substances 0.000 abstract description 2
- 230000003679 aging effect Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 10
- 230000032683 aging Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 229920003051 synthetic elastomer Polymers 0.000 description 4
- 239000005061 synthetic rubber Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- SDPFNAZQUMPARM-UHFFFAOYSA-N formaldehyde;2-(hydroxymethyl)phenol Chemical class O=C.OCC1=CC=CC=C1O SDPFNAZQUMPARM-UHFFFAOYSA-N 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an anti-aging shock insulation rubber support protection rubber composition, which comprises the following components in parts by weight: natural rubber: 75-85 parts of butadiene rubber: 5-15 parts of styrene-butadiene rubber: 6-18 parts of an anti-aging agent: 2-6 parts of vulcanizing agent: 1.6-2.8 parts of sodium carbonate: 5-12 parts of flame retardant: 3-12 parts of an antiwear agent: 10-26 parts of plasticizer: 22-35 parts of rubber softener: 0.8-1.7 parts of active agent: 2.5-4.2. The invention improves the wear resistance of the rubber, prolongs the service life of the rubber, improves the ageing property of the rubber, has good flame retardance and heat resistance, and ensures that the physical and chemical properties of the rubber are optimized and improved.
Description
Technical Field
The invention relates to the technical field of rubber products, in particular to a shock insulation rubber support protection rubber composition with anti-aging performance.
Background
Through the development of more than half a century, the synthetic rubber industry of China walks through a path combining domestic independent research and development with introduction of foreign advanced technology. At present, a relatively complete synthetic rubber industrial system is formed in China. Especially in recent years, with the acceleration of the tire industry, infrastructure pace and the like in China, the production capacity of the synthetic rubber in China keeps a rapidly-growing situation, and the production capacity and the consumption of the device are the first in the world. From the aspect of rubber resources, the productivity and the yield of the synthetic rubber in China are increased year by year, the self-supporting rate is greatly improved, the domestic natural rubber yield and the foreign controllable resources are further increased, and the continuous healthy development of the rubber industry in China is facilitated. In recent years, the variety structure of rubber products such as tires in China is continuously optimized, and great convenience is brought to production and life of people.
Rubber supports are one of the most common rubber products, and shock-insulating rubber supports are beginning to be widely applied to the construction industry. The most common shock-insulation rubber support is obtained by adopting a series of processing technologies such as vulcanization and the like by mutually overlapping rubber and steel plates. The periphery of the support is covered by rubber, so that the laminated rubber sheet of the inner layer of the support is isolated from external oxygen, ozone, heat and high-energy radiation, valence-variable metal ions, chemical substances, mold and the like, and the performance of the support is not influenced by external environment, so that the performance of the support is reduced. Wherein, filing date 2013.05.08, patent application number: 201310031793.9 discloses a shock-insulating rubber support protection rubber composition with excellent anti-aging performance, the anti-aging performance of the shock-insulating rubber support protection rubber composition cannot meet the use requirement of the current shock-insulating rubber support, the shock-insulating rubber support protection rubber composition is required to be further improved, and the shock-insulating rubber support protection rubber composition is easy to age, so that the shock-insulating rubber support protection rubber composition with the anti-aging performance has the technical defects of service life reduction and the like, and has a very good application prospect.
Disclosure of Invention
The invention aims to provide a shock insulation rubber support protection rubber composition with anti-aging performance, which comprises the following components in parts by weight:
natural rubber: 75-85 parts of a compound containing,
Butadiene rubber: 5-15 parts of a base material,
Styrene-butadiene rubber: 6-18 parts of a compound containing,
Anti-aging agent: 2-6 parts of a compound, wherein,
Vulcanizing agent: 1.6 to 2.8 parts of a compound,
Sodium carbonate: 5-12 parts of a base material, wherein the base material comprises,
Flame retardant: 3-12 parts of a compound of formula (I),
Wear-resistant agent: 10-26 parts of a compound, wherein the compound comprises,
And (3) a plasticizer: 22-35 parts of a compound containing,
Rubber softener: 0.8-1.7 parts of a compound,
Active agent: 2.5-4.2 parts.
Preferably, the antioxidant is a mixture of any two of the antioxidants DFL, 168, DLTP, AP and 4010.
Preferably, the proportion of the anti-aging agent is 1:1 (in mass ratio).
Preferably, the flame retardant is a mixture of aluminum hydroxide and zinc borate.
Preferably, the vulcanizing agent is one of an alkyl phenol-formaldehyde resin or a halogenated methylol phenol-formaldehyde resin.
Preferably, the antiwear agent is bis- (3-triethoxysilylpropyl) -tetrasulfide.
Compared with the prior art, the invention has the beneficial effects that: the shock-insulating rubber support protecting rubber composition adopts the combination of the phenol antioxidant and the amine antioxidant, so that the respective performance advantages can be fully exerted, the shock-insulating rubber support rubber has excellent anti-aging performance, the service life of the shock-insulating rubber support is indirectly prolonged, the vulcanizing agent is one of alkyl phenolic resin or halogenated methylol phenolic resin, the heat resistance, crack extensibility and dynamic bending performance of the rubber are improved, the wear-resistant agent is bis- (3-triethoxysilylpropyl) -tetrasulfide, the mechanical performance and wear resistance of the rubber are well improved, the flame retardant performance of the rubber can be improved by adding the flame retardant, the physical performance of a rubber product is optimized, the wear resistance of the rubber is improved, the service life of the rubber is prolonged, the ageing performance of the rubber is improved, the shock-insulating rubber support protecting rubber has good flame retardance and heat resistance, and the physicochemical performance of the rubber is optimally improved.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The shock insulation rubber support protection rubber composition with the anti-aging performance comprises the following components in parts by weight:
Natural rubber: 75 parts of a mixture of two or more components,
Butadiene rubber: 5 parts of the components in parts by weight,
Styrene-butadiene rubber: 6 parts of the components are mixed together,
Anti-aging agent: 2 parts of the components are mixed together,
Vulcanizing agent: 1.6 parts of the total weight of the mixture,
Sodium carbonate: 5 parts of the components in parts by weight,
Flame retardant: 3 parts of the components in parts by weight,
Wear-resistant agent: 10 parts of a powder for injection,
And (3) a plasticizer: 22 parts of a powder of a mixture of two,
Rubber softener: 0.8 part of the total weight of the mixture,
Active agent: 2.5 parts of the components in parts by weight,
The antioxidant is a mixture of any two of antioxidant DFL, antioxidant 168, DLTP, antioxidant AP and antioxidant 4010.
The proportion of the anti-aging agent is 1:1 (in mass ratio).
The flame retardant is a mixture of aluminum hydroxide and zinc borate.
The vulcanizing agent is one of alkyl phenolic resin or halogenated methylol phenolic resin.
The wear-resistant agent is bis- (3-triethoxysilylpropyl) -tetrasulfide.
The following table shows the actual physical properties of the rubber of example 1 at 180℃and the test results are shown in the following table:
Detecting items | National standard requirement | Actual detection result |
Tensile Strength (MPa) | ≥14.0 | 19.0 |
Elongation at break (%) | ≥600 | 610 |
Tensile Strength Change Rate (%) | ±25 | +3.2 |
Coefficient of aging | 1 | 0.989 |
Hardness (Shore A degree) | 35±5 | 38 |
Example 2
The shock insulation rubber support protection rubber composition with the anti-aging performance comprises the following components in parts by weight:
Natural rubber: 80 parts of the components in parts by weight,
Butadiene rubber: 10 parts of a powder for injection,
Styrene-butadiene rubber: 12 parts of the total weight of the powder,
Anti-aging agent: 4 parts of the total weight of the powder,
Vulcanizing agent: 2.1 parts of the components, namely,
Sodium carbonate: 8 parts of the components in parts by weight,
Flame retardant: 9 parts of the mixture, namely, the mixture,
Wear-resistant agent: 18 parts of a mixture of two or more components,
And (3) a plasticizer: 27 parts of a water-soluble polymer,
Rubber softener: 1.3 parts of the components, namely,
Active agent: 3.1 parts of the components, namely,
The antioxidant is a mixture of any two of antioxidant DFL, antioxidant 168, DLTP, antioxidant AP and antioxidant 4010.
The proportion of the anti-aging agent is 1:1 (in mass ratio).
The flame retardant is a mixture of aluminum hydroxide and zinc borate.
The vulcanizing agent is one of alkyl phenolic resin or halogenated methylol phenolic resin.
The wear-resistant agent is bis- (3-triethoxysilylpropyl) -tetrasulfide.
The following table shows the actual physical properties measured at 180℃for the rubber of example 2, and the test results are shown in the following table:
Detecting items | National standard requirement | Actual detection result |
Tensile Strength (MPa) | ≥14.0 | 20.0 |
Elongation at break (%) | ≥600 | 620 |
Tensile Strength Change Rate (%) | ±25 | +5.2 |
Coefficient of aging | 1 | 0.998 |
Hardness (Shore A degree) | 35±5 | 39 |
Example 3
The shock insulation rubber support protection rubber composition with the anti-aging performance comprises the following components in parts by weight:
natural rubber: 85 parts of the total weight of the powder,
Butadiene rubber: 15 parts of a mixture of two or more components,
Styrene-butadiene rubber: 18 parts of a mixture of two or more components,
Anti-aging agent: 6 parts of the components are mixed together,
Vulcanizing agent: 2.8 parts of a powder containing,
Sodium carbonate: 12 parts of the total weight of the powder,
Flame retardant: 12 parts of the total weight of the powder,
Wear-resistant agent: 26 parts of a mixture of two or more components,
And (3) a plasticizer: 35 parts of a powder for injection,
Rubber softener: 1.7 parts of the total weight of the mixture,
Active agent: 4.2 parts of the total weight of the mixture,
The antioxidant is a mixture of any two of antioxidant DFL, antioxidant 168, DLTP, antioxidant AP and antioxidant 4010.
The proportion of the anti-aging agent is 1:1 (in mass ratio).
The flame retardant is a mixture of aluminum hydroxide and zinc borate.
The vulcanizing agent is one of alkyl phenolic resin or halogenated methylol phenolic resin.
The wear-resistant agent is bis- (3-triethoxysilylpropyl) -tetrasulfide.
The following table shows the actual physical properties of the rubber of example 3 at 180℃and the test results are shown in the following table:
Detecting items | National standard requirement | Actual detection result |
Tensile Strength (MPa) | ≥14.0 | 19.0 |
Elongation at break (%) | ≥600 | 615 |
Tensile Strength Change Rate (%) | ±25 | +4.7 |
Coefficient of aging | 1 | 0.991 |
Hardness (Shore A degree) | 35±5 | 38 |
Taken together, the results of the tests described in connection with examples 1-3 and the related thereto demonstrate that: the shock-insulating rubber support prepared by the composition has optimized and improved performances such as tensile strength, breaking growth rate, tensile strength change rate, aging coefficient and hardness, and the like.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A shock insulation rubber support protection rubber composition with anti-aging performance is characterized in that: the components of the composition are as follows in parts by weight:
natural rubber: 75-85 parts of a compound containing,
Butadiene rubber: 5-15 parts of a base material,
Styrene-butadiene rubber: 6-18 parts of a compound containing,
Anti-aging agent: 2-6 parts of a compound, wherein,
Vulcanizing agent: 1.6 to 2.8 parts of a compound,
Sodium carbonate: 5-12 parts of a base material, wherein the base material comprises,
Flame retardant: 3-12 parts of a compound of formula (I),
Wear-resistant agent: 10-26 parts of a compound, wherein the compound comprises,
And (3) a plasticizer: 22-35 parts of a compound containing,
Rubber softener: 0.8-1.7 parts of a compound,
Active agent: 2.5-4.2 parts.
2. The anti-aging shock-absorbing rubber support protective rubber composition according to claim 1, wherein: the antioxidant is a mixture of any two of antioxidant DFL, antioxidant 168, DLTP, antioxidant AP and antioxidant 4010.
3. The anti-aging shock-absorbing rubber support protective rubber composition according to claim 2, wherein: the proportion of the anti-aging agent is 1:1 by mass ratio.
4. The anti-aging shock-absorbing rubber support protective rubber composition according to claim 1, wherein: the flame retardant is a mixture of aluminum hydroxide and zinc borate.
5. The anti-aging shock-absorbing rubber support protective rubber composition according to claim 1, wherein: the vulcanizing agent is one of alkyl phenolic resin or halogenated methylol phenolic resin.
6. The anti-aging shock-absorbing rubber support protective rubber composition according to claim 1, wherein: the wear-resistant agent is bis- (3-triethoxysilylpropyl) -tetrasulfide.
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CN105524304A (en) * | 2015-12-15 | 2016-04-27 | 宁国天运橡塑制品有限公司 | Wear-resistant ageing-resistant rubber sleeve for automotive steering gear bushing |
CN106867044A (en) * | 2017-01-05 | 2017-06-20 | 开封铁塔橡胶(集团)有限公司 | High resiliency, wear-resistant, shock resistance conveyer belt and preparation method thereof |
CN106832448A (en) * | 2017-02-22 | 2017-06-13 | 双钱集团上海轮胎研究所有限公司 | A kind of tread rubber for preparing high-performance tire |
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