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CN104497378A - Anti-cracking high-performance rubber composite material and preparation method thereof - Google Patents

Anti-cracking high-performance rubber composite material and preparation method thereof Download PDF

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Publication number
CN104497378A
CN104497378A CN201510001560.3A CN201510001560A CN104497378A CN 104497378 A CN104497378 A CN 104497378A CN 201510001560 A CN201510001560 A CN 201510001560A CN 104497378 A CN104497378 A CN 104497378A
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parts
matrix material
carbon black
cracking resistance
performance rubber
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翁更生
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Ningbo University
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Ningbo University
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/06Sulfur
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/34Silicon-containing compounds
    • C08K3/36Silica
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/09Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients
    • C08K9/04Ingredients treated with organic substances
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • C08K2003/2296Oxides; Hydroxides of metals of zinc
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/002Physical properties
    • C08K2201/003Additives being defined by their diameter

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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)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention provides an anti-cracking high-performance rubber composite material and a preparation method thereof. The anti-cracking high-performance rubber composite material comprises the following raw materials in parts by mass: 100 parts of rubbers, 1-8 parts of functionalized low-molecular weight polymers, 5-30 parts of white carbon black, 1-4 parts of anti-aging agents, 0.5-3 parts of vulcanizing agents, 1-5 parts of vulcanizing activators and 1-3 parts of vulcanizing accelerators. The preparation method comprises the following steps: ultrasonically dispersing 10-50 parts of white carbon black for 10-50min and drying in a vacuum drying oven for after use; mixing the dried white carbon black with 1-6 parts of functionalized low-molecular weight polymers in an internal mixer for 10-30min; blending with the rubbers in an open mill after sufficient reaction; vulcanizing the prepared master batch in a vulcanizing machine at 120-160DEG C for 10-20min to obtain the anti-cracking high-performance rubber composite material. The anti-cracking high-performance rubber composite material has the advantages of prolonging the service life and being non-toxic, stable, easy to store, safe, environment-friendly and strong in anti-cracking performance.

Description

A kind of cracking resistance high-performance rubber matrix material and preparation method thereof
Technical field
The present invention relates to processing of high molecular material technical field, be specifically related to a kind of matrix material and preparation method thereof, especially a kind of cracking resistance high-performance rubber matrix material and preparation method thereof.
Background technology
Rubber product, especially tire, all inevitably runs into aging, crackle at work, the series of problems such as wearing and tearing, wherein the growth of crackle is particularly outstanding to the harm of rubber, and rubber, under the effect of the load in cycle, can produce fatigue statistic gradually, along with the increase of time, crackle is gradually expanded in fatigue process, finally can cause the destruction of elastomeric material, and therefore rubber crack growth is a problem of can not ignore.Following several method is mainly contained at present: the anti-cracking performance being carried out Reinforced Rubber by the divinyl rubber of modification and the polybutadiene rubber filling white carbon black (Chinese patent CN101735498A) that is polymerized the tin modification formed with lithium initiator about cracking resistance rubber composite; The cracking growth resistance (Chinese patent CN103243561A) of natural rubber material is strengthened by a kind of aramid fiber of surface modification; By adding the cracking growth resistance (Chinese patent CN103483631A) etc. of wear resistance expanded graphite Reinforced Rubber matrix material.
Carbon black and white carbon black are as a kind of filler of cheapness, usually as the strengthening agent of rubber, greatly reduce the cost of rubber production, wherein, carbon black produces the main strengthening agent of tire, and for the reinforcement of light-coloured prods, using maximum is exactly white carbon black, white carbon black has the character such as superpower adhesive power, low-heat-generation simultaneously, thus in black rubber goods also alternative part carbon black, more and more draw attention in green tire.But, under similar specific surface area, its reinforcing effect is not as carbon black, this is because its a large amount of silicone hydroxyl (Si-OH) in surface makes it to become high polar material, and picture a lot of conventional rubber (NR, SBR ...) be nonpolar, like this, because both consistencies are bad, filling surface is caused can mutually to slide with rubber molecule and generate energy dissipates under Large strain.Usually, solution to this problem adds silane coupling agent, erected the bridge of linking up between filler and rubber, enhance the interaction between white carbon black and rubber by the active function groups at its two ends, improves the performance that non-polar rubber filled by white carbon black.Chinese patent CN103992437A is by preparing the realization of a kind of novel silicon alkanes macromolecular coupling agent to the control of interface structure between mineral filler and body material and optimization.But have certain toxicity due to most of silane coupling agent, and be not easy to deposit (easily decomposing) and also due to the relative molecular weight of most silane coupling agent larger, longer time and higher temperature is needed in mixing process, fracture is there is and participates in vulcanization reaction in sulfide linkage wherein in high-temperature mixing, cause incipient scorch, become the fatal shortcoming of silane coupling agent.Therefore, need exploitation a kind of nontoxic, the performance that stable rubber reinforcing filler improves white carbon black filled rubber is particularly important.
In order to allow rubber be easy to processing, liquid oils and lipid often to be added in industry to reach softening effect, more convenient like this processing, but this kind of material majority is containing polycyclic aromatic hydrocarbon compounds, this kind of material and skin contact harmful, and great majority have contaminative, easy to change under sunlight; Easily be drawn out of in rubber, move, its application in rubber is had a greatly reduced quality.At present, the low-molecular weight polymer having a similar structures with rubber becomes hot issue as the research of tenderizer, they can not only give rubber good processing characteristics, and its chain structure and rubber phase are seemingly, the consistency of filler and matrix significantly can be improved after functionalized, and can participate in crosslinked when sulfuration, become an integral part in rubber cross network, make rubber have excellent physicals and stability.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of cracking resistance high-performance rubber matrix material and preparation method thereof, in conjunction with the feature of functionalized low-molecular weight polymer and white carbon black, on the functionalized low-molecular weight polymer allowing the white carbon black with hydroxyl be grafted to carboxylic side-chain, and pass through sulfuration, enter in rubber cross network structure, white carbon black is better dispersed in rubber, the better anti-cracking performance of final imparting rubber, good stability, be easy to deposit, safety and environmental protection, long service life, anti-cracking performance is strong.
For solving above-mentioned existing technical problem, the present invention adopts following scheme: a kind of cracking resistance high-performance rubber matrix material, the raw material comprising following masses part is made: rubber 100 parts, functionalized low-molecular weight polymer 1-8 part, white carbon black 5-30 part, anti-aging agent 1-4 part, vulcanizing agent 0.5-3 part, vulcanization activator 1-5 part, vulcanization accelerator 1-3 part.
As preferably, described vulcanizing agent is sulphur.
As preferably, described anti-aging agent is N-cyclohexyl-N '-diphenyl-para-phenylene diamine, N ', N ' at least one in-dicyclohexyl Ursol D.
As preferably, described vulcanization activator is zinc oxide and stearic acid.
As preferably, described vulcanization accelerator is benzothiazyl disulfide, N cyclohexyl 2 benzothiazole sulfenamide, wherein a kind of in tetramethyl-thiuram disulfide three kinds.
As preferably, the particle diameter of described white carbon black is 30-50 nanometer.
As preferably, described functionalized low-molecular weight polymer side chain contains carboxyl.
For achieving the above object, the present invention proposes a kind of preparation method of cracking resistance high-performance rubber matrix material, comprise the following steps: by 10-50 part white carbon black ultrasonic disperse 10-50min, dry for standby in vacuum drying oven again, by the white carbon black of oven dry and functionalized low-molecular weight polymer 1-6 part mixing 10-30min in Banbury mixer, blended in mill with rubber after abundant reaction, obtained masterbatch 120-160 DEG C of sulfuration 10-20min in vulcanizer obtains cracking resistance high-performance rubber matrix material.
Beneficial effect:
The present invention adopts technique scheme to provide a kind of cracking resistance high-performance rubber matrix material and preparation method thereof, compensate for deficiency of the prior art, decrease rubber stressed time stress concentration phenomenon, slow down the speed of crack growth, successfully improve rubber anti-cracking performance.
Embodiment
A kind of cracking resistance high-performance rubber matrix material, the raw material comprising following masses part is made: rubber 100 parts, functionalized low-molecular weight polymer 1-8 part, white carbon black 5-30 part, anti-aging agent 1-4 part, vulcanizing agent 0.5-3 part, vulcanization activator 1-5 part, vulcanization accelerator 1-3 part.Described vulcanizing agent is sulphur.Described anti-aging agent is N-cyclohexyl-N '-diphenyl-para-phenylene diamine, N ', N ' at least one in-dicyclohexyl Ursol D.Described vulcanization activator is zinc oxide and stearic acid.Described vulcanization accelerator is benzothiazyl disulfide, N cyclohexyl 2 benzothiazole sulfenamide, the wherein one in tetramethyl-thiuram disulfide three kinds.The particle diameter of described white carbon black is 30-50 nanometer.Described functionalized low-molecular weight polymer side chain contains carboxyl.
A kind of preparation method of cracking resistance high-performance rubber matrix material, comprise the following steps: by 10-50 part white carbon black ultrasonic disperse 10-50min, dry for standby in vacuum drying oven again, by the white carbon black of oven dry and functionalized low-molecular weight polymer 1-6 part mixing 10-30min in Banbury mixer, blended in mill with rubber after abundant reaction, obtained masterbatch 120-160 DEG C of sulfuration 10-20min in vulcanizer obtains cracking resistance high-performance rubber matrix material.
The present invention's functionalized low-molecular weight polymer used, with pendant carboxyl groups, is shown below:
During real work; by following embodiment, the present invention is specifically described; what be necessary to herein means out is that the present embodiment is only used to further illustrate the present invention again; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
The present invention's white carbon black used adopts 115GR, and median size is at 30-50 ran.
The mixing formula (mass parts) of rubber of the present invention is as follows: rubber 100 parts, stearic acid 2-5 part, zinc oxide 2-5 part, sulphur 1-3 part, promotor 1-2 part.
The present invention's three kinds of samples mix (mass ratio) in following ratio: natural rubber: functionalized low-molecular weight polymer: white carbon black=100:(1-8): (10-50)
The pre-treatment of white carbon black of the present invention: white carbon black is put into vacuum drying oven and dry 24-72h, ultrasonic disperse 15-60min, puts into vacuum drying oven for subsequent use.
The graft reaction of the functionalized low-molecular weight polymer of the present invention and white carbon black: by rubber and functionalized low-molecular weight polymer and white carbon black in Banbury mixer 140-170 DEG C mix 5-15min after take out add promotor and vulcanizing agent in mill, after vulcanizer 140-160 DEG C of sulfuration 5-10min, take out obtained testing sample after placing 24-48h.
The performance test of inventive samples: the crack growth test instrument that experiment adopts French Metravib company to produce, the rubber with pre-scarfing is subject to the Cyclic Load that frequency is 5-10Hz, and effect tearing energy is 1000J/m 2; Fracture tensile strength, elongation at break, stress at definite elongation are tested according to GB/T528-199, and hardness (Shao A) is carried out according to GB/T23651-2009.
Embodiment 1: 100 parts, styrene-butadiene rubber(SBR) and functionalized low-molecular weight polymer 2 parts are filled 10 parts of white carbon blacks, 160 DEG C of blended 15min in Banbury mixer, after question response is complete, add 2 parts, sulphur, accelerant N-cyclohexyl-2-[4-morpholinodithio sulphenamide 1 part, 5 parts, zinc oxide, stearic acid 2 parts, obtained masterbatch after mixing completely in mill, masterbatch vulcanizing press 150 DEG C, pressure 15MPa, mold pressing 12 minutes, obtained cracking resistance high-performance rubber matrix material, testing its fracture tensile strength is 12.4MPa, elongation at break 520%, crack growth rate is 90nm/cycle, hardness (Shao A) is 62.2 degree, as shown in Table 1 below.
Embodiment 2: natural rubber 100 parts and functionalized low-molecular weight polymer 2 parts are filled 10 parts of white carbon blacks, 160 DEG C of blended 15min in Banbury mixer, after question response is complete, add 2 parts, sulphur, accelerant N-cyclohexyl-2-[4-morpholinodithio sulphenamide 1 part, 5 parts, zinc oxide, stearic acid 2 parts, obtained masterbatch after mixing completely in mill, masterbatch vulcanizing press 150 DEG C, pressure 15MPa, mold pressing 12 minutes, obtained cracking resistance high-performance rubber matrix material, testing its fracture tensile strength is 21.6MPa, elongation at break 550%, crack growth rate is 30nm/cycle, hardness (Shao A) is 72.4 degree, as shown in Table 1 below.
Embodiment 3: cis-1,4-polybutadiene rubber 100 parts and functionalized low-molecular weight polymer 2 parts are filled 10 parts of white carbon blacks, 160 DEG C of blended 15min in Banbury mixer, after question response is complete, add 2 parts, sulphur, accelerant N-cyclohexyl-2-[4-morpholinodithio sulphenamide 1 part, 5 parts, zinc oxide, stearic acid 2 parts, obtained masterbatch after mixing completely in mill, masterbatch vulcanizing press 150 DEG C, pressure 15MPa, mold pressing 12 minutes, obtained cracking resistance high-performance rubber matrix material, testing its fracture tensile strength is 9.8MPa, elongation at break 530%, crack growth rate is 100nm/cycle, hardness (Shao A) is 65.4 degree, as shown in Table 1 below.
Table 1: embodiment 1-3 desired raw material and proportioning
Comparative example 1: 100 parts, styrene-butadiene rubber(SBR) is filled 10 parts of white carbon black 160 DEG C of blended 15min in Banbury mixer, after question response is complete, add 2 parts, sulphur, accelerant N-cyclohexyl-2-[4-morpholinodithio sulphenamide 1 part, 5 parts, zinc oxide, stearic acid 2 parts, obtained masterbatch after mixing completely in mill, masterbatch vulcanizing press 150 DEG C, pressure 15MPa, mold pressing 12 minutes, obtained cracking resistance high-performance rubber matrix material, testing its fracture tensile strength is 7.1MPa, elongation at break 500%, crack growth rate is 150nm/cycle, hardness (Shao A) is 60.7 degree, as shown in Table 2 below.
Comparative example 2: natural rubber 100 parts is filled 10 parts of white carbon black 160 DEG C of blended 15min in Banbury mixer, after question response is complete, add 2 parts, sulphur, accelerant N-cyclohexyl-2-[4-morpholinodithio sulphenamide 1 part, 5 parts, zinc oxide, stearic acid 2 parts, obtained masterbatch after mixing completely in mill, masterbatch vulcanizing press 150 DEG C, pressure 15MPa, mold pressing 12 minutes, obtained cracking resistance high-performance rubber matrix material, testing its fracture tensile strength is 15.1MPa, elongation at break 530%, crack growth rate is 70nm/cycle, hardness (Shao A) is 74.2 degree, as shown in Table 2 below.
Comparative example 3: cis-1,4-polybutadiene rubber 100 parts is filled 10 parts of white carbon black 160 DEG C of blended 15min in Banbury mixer, after question response is complete, add 2 parts, sulphur, accelerant N-cyclohexyl-2-[4-morpholinodithio sulphenamide 1 part, 5 parts, zinc oxide, stearic acid 2 parts, obtained masterbatch after mixing completely in mill, masterbatch vulcanizing press 150 DEG C, pressure 15MPa, mold pressing 12 minutes, obtained cracking resistance high-performance rubber matrix material, testing its fracture tensile strength is 5.2MPa, elongation at break 500%, crack growth rate is 160nm/cycle, hardness (Shao A) is 67.4 degree, as shown in Table 2 below.
Table 2: comparative example 1-3 desired raw material and proportioning
Table 3: embodiment 1-3 compares with comparative example 1-3 properties of sample
Specific embodiment described herein is only to the explanation for example of the present invention's spirit, those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims (8)

1. a cracking resistance high-performance rubber matrix material, is characterized in that: the raw material comprising following masses part is made: rubber 100 parts, functionalized low-molecular weight polymer 1-8 part, white carbon black 5-30 part, anti-aging agent 1-4 part, vulcanizing agent 0.5-3 part, vulcanization activator 1-5 part, vulcanization accelerator 1-3 part.
2. a kind of cracking resistance high-performance rubber matrix material according to claim 1, is characterized in that: described vulcanizing agent is sulphur.
3. a kind of cracking resistance high-performance rubber matrix material according to claim 1, is characterized in that: described anti-aging agent is N-cyclohexyl-N '-diphenyl-para-phenylene diamine, N ', N ' at least one in-dicyclohexyl Ursol D.
4. a kind of cracking resistance high-performance rubber matrix material according to claim 1, is characterized in that: described vulcanization activator is zinc oxide and stearic acid.
5. a kind of cracking resistance high-performance rubber matrix material according to claim 1, is characterized in that: described vulcanization accelerator is benzothiazyl disulfide, N cyclohexyl 2 benzothiazole sulfenamide, the wherein one in tetramethyl-thiuram disulfide three kinds.
6. a kind of cracking resistance high-performance rubber matrix material according to claim 1, is characterized in that: the particle diameter of described white carbon black is 30-50 nanometer.
7. a kind of cracking resistance high-performance rubber matrix material according to claim 1, is characterized in that: described functionalized low-molecular weight polymer side chain contains carboxyl.
8. the preparation method of a cracking resistance high-performance rubber matrix material, it is characterized in that: comprise the following steps: by 10-50 part white carbon black ultrasonic disperse 10-50min, dry for standby in vacuum drying oven again, by the white carbon black of oven dry and functionalized low-molecular weight polymer 1-6 part mixing 10-30min in Banbury mixer, blended in mill with rubber after abundant reaction, obtained masterbatch 120-160 DEG C of sulfuration 10-20min in vulcanizer obtains cracking resistance high-performance rubber matrix material.
CN201510001560.3A 2015-01-04 2015-01-04 Anti-cracking high-performance rubber composite material and preparation method thereof Pending CN104497378A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107629263A (en) * 2017-09-25 2018-01-26 宁波大学 A kind of high-performance cracking growth resistance rubber composite and preparation method thereof
CN113248916A (en) * 2021-06-07 2021-08-13 苏州奈米新纺织科技有限公司 Large-gauge warp-knitted inflatable hoisting air cushion material
EP4067112A1 (en) * 2021-04-01 2022-10-05 LANXESS Deutschland GmbH RUBBER MIXTURES CONTAINING N, Ný -DIALKYL-P-PHENYLENEDIAMINES
WO2022207729A1 (en) * 2021-04-01 2022-10-06 Lanxess Deutschland Gmbh Rubber mixtures containing n,n'-dialkyl-p-phenylenediamines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101035850A (en) * 2004-08-10 2007-09-12 Jsr株式会社 Rubber composition and tire
CN102229713A (en) * 2011-05-17 2011-11-02 贵州光华橡塑有限公司 Durable rubber and sample preparation method thereof
JP2013144815A (en) * 2013-05-01 2013-07-25 Sumitomo Rubber Ind Ltd Rubber composition for tread, tread, and tire using the tread
CN104151657A (en) * 2014-07-22 2014-11-19 河南省金久龙实业有限公司 Edge-cutting double-sided transmission tooth-shaped tight-up belt
CN104448450A (en) * 2014-11-26 2015-03-25 田丽华 High-performance composite wire and cable insulation layer material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101035850A (en) * 2004-08-10 2007-09-12 Jsr株式会社 Rubber composition and tire
CN102229713A (en) * 2011-05-17 2011-11-02 贵州光华橡塑有限公司 Durable rubber and sample preparation method thereof
JP2013144815A (en) * 2013-05-01 2013-07-25 Sumitomo Rubber Ind Ltd Rubber composition for tread, tread, and tire using the tread
CN104151657A (en) * 2014-07-22 2014-11-19 河南省金久龙实业有限公司 Edge-cutting double-sided transmission tooth-shaped tight-up belt
CN104448450A (en) * 2014-11-26 2015-03-25 田丽华 High-performance composite wire and cable insulation layer material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107629263A (en) * 2017-09-25 2018-01-26 宁波大学 A kind of high-performance cracking growth resistance rubber composite and preparation method thereof
CN107629263B (en) * 2017-09-25 2019-07-26 宁波大学 A kind of high-performance cracking growth resistance rubber composite material and preparation method thereof
EP4067112A1 (en) * 2021-04-01 2022-10-05 LANXESS Deutschland GmbH RUBBER MIXTURES CONTAINING N, Ný -DIALKYL-P-PHENYLENEDIAMINES
WO2022207729A1 (en) * 2021-04-01 2022-10-06 Lanxess Deutschland Gmbh Rubber mixtures containing n,n'-dialkyl-p-phenylenediamines
CN113248916A (en) * 2021-06-07 2021-08-13 苏州奈米新纺织科技有限公司 Large-gauge warp-knitted inflatable hoisting air cushion material

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Application publication date: 20150408