CN111117083A - Encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer and preparation method thereof - Google Patents
Encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer and preparation method thereof Download PDFInfo
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- CN111117083A CN111117083A CN202010024724.5A CN202010024724A CN111117083A CN 111117083 A CN111117083 A CN 111117083A CN 202010024724 A CN202010024724 A CN 202010024724A CN 111117083 A CN111117083 A CN 111117083A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- 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
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Abstract
The invention relates to an encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber and a preparation method thereof, belonging to the technical field of encapsulating sleeves. The encapsulating sleeve comprises the following raw materials: IIR 26850-100 parts; EPDM J20705-50 parts; 10-50 parts of carbon black; 10-50 parts of white carbon black; 5-30 parts of paraffin oil; 0.2-3 parts of a silane coupling agent; 1-10 parts of zinc oxide; 0.5-2 parts of stearic acid; 2-6 parts of an anti-aging agent; 3-10 parts of a homogenizing agent; 2-6 parts of a processing aid; 1-3 parts of sulfur; 0.1-1.5 parts of accelerator TMTD; 1-3 parts of accelerator MBTS; 1-3 parts of accelerator ZDBC; 0-2 parts of accelerator DTDM. The encapsulating sleeve has excellent thermal-oxidative aging resistance, excellent mechanical property and longer service life; the invention also provides a simple preparation method.
Description
Technical Field
The invention relates to an encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber and a preparation method thereof, belonging to the technical field of encapsulating sleeves.
Background
The envelope is a rubber sheath specially made for retreading the tire, can be repeatedly used and also belongs to a consumable product. The tyre retreading aims at improving the comprehensive utilization of resources, repairing the old and utilizing the waste and reducing the environmental pollution. The waste tire recycling is the extension and processing reutilization of the tire industry, and promotes the comprehensive utilization of resource conservation. For safety reasons and the like, the service life of a tire body of a motor vehicle is far longer than that of a tire surface (for example, the service life of the tire body of an airplane tire is about 6 times of that of the tire surface, the service life of a truck is about 3 times of that of a car, and the service life of the truck is about 1 time of that of the truck), so that the tire used by the motor vehicle has to be retreaded for multiple.
The prior art generally uses butyl rubber to make the envelope. The butyl rubber has poor thermal oxidation aging performance, the hardness can be greatly softened after high-temperature aging, the performance is greatly reduced after the softening, the prepared encapsulation sleeve is easily subjected to permanent deformation after being repeatedly stretched in the using process, and the service life is shortened.
Qingdao national science and technology corporation discloses a patent 1320517A, an encapsulating sleeve for tire prevulcanization retreading and a preparation process thereof, wherein the encapsulating sleeve is prepared by adopting butyl rubber and various auxiliary agents. The envelope prepared by the butyl rubber using the sulfur vulcanization system has poor high temperature resistance compared with the ACM rubber, and because the envelope needs to be repeatedly vulcanized in a vulcanizing tank to coat a tire, the butyl rubber can be aged and performance attenuated after being repeatedly used at high temperature for a long time, the elongation is rapidly shortened, the envelope is easy to damage, and the service life of the envelope is shorter than that of the envelope made of the ACM rubber substrate; the butyl rubber is softened after aging, the permanent deformation is increased after long-time use, the tire to be retreaded cannot be tightly coated due to the deformation and the loose shape of the product, the sealing effect is poor, and the quality of the retreaded tire is influenced.
Disclosure of Invention
The invention aims to provide an encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber, which has excellent thermal-oxidative aging resistance, excellent mechanical property and longer service life; the invention also provides a simple preparation method.
The encapsulating sleeve prepared by compounding the butyl rubber and the ethylene propylene diene monomer comprises the following raw materials in parts by mass: IIR 26850-100 parts; EPDM J20705-50 parts; 10-50 parts of carbon black; 10-50 parts of white carbon black; 5-30 parts of paraffin oil; 0.2-3 parts of a silane coupling agent; 1-10 parts of zinc oxide; 0.5-2 parts of stearic acid; 2-6 parts of an anti-aging agent; 3-10 parts of a homogenizing agent; 2-6 parts of a processing aid; 1-3 parts of sulfur; 0.1-1.5 parts of accelerator TMTD; 1-3 parts of accelerator MBTS; promoter ZDBC1-3 parts; 0-2 parts of accelerator DTDM.
The IIR268 Mooney viscosity is ML (1+8) at 125 ℃ 51 with an unsaturation of 1.5%. Preferably a product of exxonmobil chemical company, usa.
The EPDM J2070 has the ethylene content of 57.8 percent, the Mooney viscosity of ML (1+4) at 125 ℃ of 44, the ENB content of 1.9 percent and the weight-average molecular weight of 38 to 40 ten thousand. Preferably the product of the Jilin petrochemical company.
Preferably, the carbon black is N774. Preferably from the company cabot usa;
preferably, the white carbon black is Zeosil175 GR. Preferably a product of the company Rodiya, France.
Preferably, the paraffinic oil is KP 6030.
The silane coupling agent is Si-69.
The anti-aging agent is one or two of RD or MB.
Preferably, the homogenizing agent is Struktol 40MS Flakes.
The processing aid is one or two of WB42 or WB 16.
The preparation method of the envelope comprises the following steps:
(1) pre-plasticating the virgin rubber: putting the virgin rubber into an internal mixer for rubber breaking and pre-plastication for 30S;
(2) adding auxiliary materials: adding all materials except the vulcanizing agent and the accelerator, such as a filler, a plasticizer, a processing aid, an activator, an anti-aging agent, a homogenizing agent and the like;
(3) cleaning: when the current of the internal mixer is stable and the temperature rises to 110-120 ℃, the materials flying at the feeding gate and the side wall of the internal mixer are swept into an internal mixing chamber, and the sweeping is performed twice;
(4) rubber discharging: continuously mixing rubber until the temperature reaches 150 ℃, and then discharging the rubber; (butyl rubber compounding requires higher temperatures to facilitate the removal of volatile materials, as these materials may cause air bubbles to form during subsequent molding operations);
(5) and (3) filtering: the sizing material enters a rubber filter and is filtered by 80 meshes;
(6) b, Botong pill discharge: putting the rubber compound into an open mill, carrying out aeration for 5 times under the thickness of 1mm, adjusting to 6-8 mm, cooling by strong wind through a conveyor, collecting and standing;
(7) adding a vulcanizing agent: putting the parked rubber compound into an internal mixer for hot refining for 30s, adding a vulcanizing agent and an accelerator, discharging the rubber within 2min after uniformly mixing, and controlling the temperature within 80 ℃;
(8) and (3) low-temperature Botong pill discharge: low-temperature blowing the vulcanized rubber compound for 5 times by an open mill at the thickness of less than 1mm, discharging sheets according to the process requirement, and air-cooling and standing by a cooling conveyor for later use;
(9) and (2) molding by using a special rubber compression molding machine, when the temperature of the mold reaches a process set value, placing a circle of mixed rubber in a lower mold cavity of the mold, placing a circle of mixed rubber on the upper surface of a mold core of the mold, then placing the circle of mixed rubber on the upper surface of the mold core, carrying out mold closing and pressure vulcanization on the mold through a track of the compression molding machine, demolding after the process set time is reached, and taking out the product to obtain the encapsulating sleeve.
The invention adopts two rubber materials of IIR268 and EPDM J2070 to be used together, the use of the homogenizing agent improves the composite compatibility of IIR and EPDM rubber, improves the thermo-oxidative aging performance of butyl rubber, solves the problems of great hardness softening after high-temperature aging of the butyl rubber and great reduction of the performance after softening, improves the elasticity of the butyl rubber, and improves the permanent deformation of the encapsulating sleeve caused by repeated stretching of the encapsulating sleeve in the using process of the encapsulating sleeve product, so that the product has better service life.
The design basis of the formula is established on the aspects of softening after high-temperature aging of the butyl rubber alone, high performance attenuation degree and short service life, the defects of manufacturing the envelope by using the butyl rubber are changed through the formula design, and the maximum change of the formula is the ethylene propylene diene monomer introduced into the butyl rubber formula; the ethylene propylene diene monomer thermal oxidation aging is a free radical chain type autocatalytic oxidation reaction, degradation and chain scission occur in the early stage of aging, and a crosslinking reaction and hardening after aging mainly occur in the later stage; the thermal oxidative aging of the butyl rubber belongs to degradation type, and the aging tendency is softening. Therefore, by compounding the two components, a synergistic effect is generated, the heat and oxygen aging resistance of the butyl rubber is improved, and the defects of softening of the butyl rubber due to aging, large permanent deformation and the like are overcome.
In addition, the ethylene propylene diene monomer rubber has high saturation, and has excellent light resistance, heat resistance, oxygen resistance, ozone resistance, water vapor resistance and the like; the defects of lack of active groups in molecular structure species, low cohesive energy, easy blooming and white spitting, poor self-adhesion and mutual adhesion; the disadvantage has little influence in the formula of the envelope, is far lower than the benefit of the improvement of the performance, and can be improved and avoided through the formula design.
According to the invention, two rubbers are used together, the two rubbers are not simply mixed together, but the compatibility, co-vulcanization property and the like of the two rubbers need to be considered, if the selected type is not proper, vulcanization cannot be synchronous, so that unbalanced distribution of the vulcanizing agent between the two rubbers is caused, the vulcanizing agent migrates to a rubber phase with high solubility, the vulcanization degree difference is large, and the performance of the finally used rubber is not obtained, but is poorer than the performance of the two rubbers when used separately. The butyl rubber has high saturation and low vulcanization speed, so that the ethylene propylene diene monomer J2070 is selected, the ethylene content is medium, the ENB content is 1.9%, the ethylene propylene diene monomer J2070 can be matched with the vulcanization speed, the butyl rubber belongs to the high-saturation rubber without self-reinforcement, and the compatibility is good.
The homogenizing agent has the functions of adding and improving the two rubbers, and equivalently has the function of an adhesive to tightly combine the two rubbers.
Different accelerators are added into the formula. Different accelerator varieties have different functions, and the accelerator has a certain saturated concentration when added into rubber, for example, the problem of blooming and whitening caused by excessive addition of a single accelerator is solved.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method for compounding the butyl rubber (IIR) and the Ethylene Propylene Diene Monomer (EPDM) improves the thermo-oxidative aging performance of the butyl rubber, obviously overcomes the defects that the butyl rubber is greatly softened after being aged at high temperature, the performance is greatly reduced after being softened, and the like, improves the elasticity of the butyl rubber, solves the problem that an envelope product made of the butyl rubber is large in permanent deformation due to repeated stretching in the using process, and greatly prolongs the service life of the envelope product;
(2) the formula system is scientific and reasonable in design, the prepared envelope has excellent mechanical property and thermal-oxidative-aging resistance, the service life is longer, the tensile strength is more than 9.0MPa, the elongation at break is more than 470%, and the service life reaches more than 235 times;
(3) the preparation method of the encapsulating sleeve is simple and convenient, and is beneficial to realizing industrialization.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the practice of the invention.
The raw materials used in the examples are all in parts by mass.
The Mooney viscosity of IIR268 used was ML (1+8) at 125 ℃ 51, the unsaturation was 1.5%. Is a product of Exxon Mobil chemical industry company of America.
The EPDM J2070 used had an ethylene content of 57.8%, a Mooney viscosity of ML (1+4) at 125 ℃ of 44, an ENB content of 1.9%, and a weight average molecular weight of 38 to 40 ten thousand. Is a product of Jilin petrochemical company.
Example 1
| Serial number | Components | Amount per part |
| 1 | IIR268 | 90 |
| 2 | EPDM J2070 | 10 |
| 3 | Carbon black N774 | 30 |
| 4 | White carbon black Zeosil175GR | 30 |
| 5 | Paraffin oil KP6030 | 15 |
| 6 | Silane coupling agent Si-69 | 1.5 |
| 7 | Zinc oxide | 5 |
| 8 | Stearic acid | 1 |
| 9 | Antiager RD | 1.5 |
| 10 | Anti-aging agent MB | 1 |
| 11 | Struktol 40MS Flakes as homogenizing agent | 5 |
| 12 | Processing aid WB42 | 1.5 |
| 13 | Processing aid WB16 | 1.5 |
| 14 | Sulfur | 1.8 |
| 15 | Accelerator TMTD | 0.5 |
| 16 | Accelerator MBTS | 1.5 |
| 17 | Accelerator ZDBC | 1 |
| 18 | Accelerator DTDM | 0 |
The preparation method of the envelope comprises the following steps:
(1) pre-plasticating the virgin rubber: putting the virgin rubber into an internal mixer for rubber breaking and pre-plastication for 30S;
(2) adding auxiliary materials: adding all materials except the vulcanizing agent and the accelerator, such as a filler, a plasticizer, a processing aid, an activator, an anti-aging agent, a homogenizing agent and the like;
(3) cleaning: when the current of the internal mixer is stable and the temperature rises to 110-120 ℃, the materials flying at the feeding gate and the side wall of the internal mixer are swept into an internal mixing chamber, and the sweeping is performed twice;
(4) rubber discharging: continuously mixing rubber until the temperature reaches 150 ℃, and then discharging the rubber; (butyl rubber compounding requires higher temperatures to facilitate the removal of volatile materials, as these materials may cause air bubbles to form during subsequent molding operations);
(5) and (3) filtering: the sizing material enters a rubber filter and is filtered by 80 meshes;
(6) b, Botong pill discharge: putting the rubber compound into an open mill, carrying out aeration for 5 times under the thickness of 1mm, adjusting to 6-8 mm, cooling by strong wind through a conveyor, collecting and standing;
(7) adding a vulcanizing agent: putting the parked rubber compound into an internal mixer for hot refining for 30s, adding a vulcanizing agent and an accelerator, discharging the rubber within 2min after uniformly mixing, and controlling the temperature within 80 ℃;
(8) and (3) low-temperature Botong pill discharge: low-temperature blowing the vulcanized rubber compound for 5 times by an open mill at the thickness of less than 1mm, discharging sheets according to the process requirement, and air-cooling and standing by a cooling conveyor for later use;
(9) and (2) molding by using a special rubber compression molding machine, when the temperature of the mold reaches a process set value, placing a circle of mixed rubber in a lower mold cavity of the mold, placing a circle of mixed rubber on the upper surface of a mold core of the mold, then placing the circle of mixed rubber on the upper surface of the mold core, carrying out mold closing and pressure vulcanization on the mold through a track of the compression molding machine, demolding after the process set time is reached, and taking out the product to obtain the encapsulating sleeve.
The prepared envelope is subjected to related performance tests according to national standards, and the results are as follows:
hardness 52 degree;
the tensile strength is 10.3 MPa;
elongation 677%;
tear strength 37.5 kN/m;
after aging at 125 ℃ for 72H:
hardness 51 °; the tensile strength is 9.4 MPa;
elongation of 515%;
and (3) testing the service life of the prepared packaging sleeve: and 238 times.
Example 2
The preparation method was the same as in example 1.
The prepared envelope is subjected to related performance tests according to national standards, and the results are as follows:
hardness is 55 degrees;
the tensile strength is 10.7 MPa;
elongation 626%;
the tearing strength is 35.8 kN/m;
after aging at 125 ℃ for 72H:
hardness 56 °;
the tensile strength is 9.8 MPa;
the elongation is 490%;
and (3) testing the service life of the prepared packaging sleeve: 262 times.
Example 3
The preparation method was the same as in example 1.
The prepared envelope is subjected to related performance tests according to national standards, and the results are as follows:
hardness 56 °;
the tensile strength is 11 MPa;
elongation 612%;
tear strength 33.5 kN/m;
after aging at 125 ℃ for 72H:
hardness 57 °;
the tensile strength is 10.3 MPa;
elongation 478%;
and (3) testing the service life of the prepared packaging sleeve: 245 times.
Example 4
| Serial number | Components | Amount per part |
| 1 | IIR268 | 70 |
| 2 | EPDM J2070 | 30 |
| 3 | Carbon black N774 | 30 |
| 4 | White carbon black Zeosil175GR | 30 |
| 5 | Paraffin oil KP6030 | 15 |
| 6 | Silane coupling agent Si-69 | 1.5 |
| 7 | Zinc oxide | 5 |
| 8 | Stearic acid | 1 |
| 9 | Antiager RD | 1.5 |
| 10 | Anti-aging agent MB | 1 |
| 11 | Struktol 40MS Flakes as homogenizing agent | 5 |
| 12 | Processing aid WB42 | 1.5 |
| 13 | Processing aid WB16 | 1.5 |
| 14 | Sulfur | 1 |
| 15 | Accelerator TMTD | 0.5 |
| 16 | Accelerator MBTS | 1.5 |
| 17 | Accelerator ZDBC | 1 |
| 18 | Accelerator DTDM | 2 |
The preparation method was the same as in example 1.
The prepared envelope is subjected to related performance tests according to national standards, and the results are as follows:
hardness 53 °;
the tensile strength is 9.6 MPa;
elongation 681%;
tear strength 33.5 kN/m;
after aging at 125 ℃ for 72H:
hardness 56 °;
the tensile strength is 10 MPa;
elongation 524%;
and (3) testing the service life of the prepared packaging sleeve: 254 times.
Comparative example 1
The other components were the same as in example 1 except that:
no ethylene propylene diene monomer was added.
The preparation method is the same as that of example 1.
The prepared envelope is subjected to related performance tests according to national standards, and the results are as follows:
hardness 50 °;
the tensile strength is 8.6 MPa;
the elongation is 481%;
tear strength 33.9 kN/m;
after aging at 125 ℃ for 72H:
hardness 48 °; the tensile strength is 7.5 MPa;
elongation 416%;
and (3) testing the service life of the prepared packaging sleeve: 112 times.
Comparative example 2
The other components were the same as in example 1 except that:
no homogenizing agent was added.
The preparation method is the same as that of example 1.
The prepared envelope is subjected to related performance tests according to national standards, and the results are as follows:
hardness 50 °;
the tensile strength is 8.9 MPa;
elongation 519%;
tear strength 32.5 kN/m;
after aging at 125 ℃ for 72H:
hardness 49 °; the tensile strength is 8.4 MPa;
the elongation is 485%;
and (3) testing the service life of the prepared packaging sleeve: 216 times.
Claims (10)
1. An envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer is characterized in that: the composite material comprises the following raw materials in parts by mass: IIR 26850-100 parts; EPDM J20705-50 parts; 10-50 parts of carbon black; 10-50 parts of white carbon black; 5-30 parts of paraffin oil; 0.2-3 parts of a silane coupling agent; 1-10 parts of zinc oxide; 0.5-2 parts of stearic acid; 2-6 parts of an anti-aging agent; 3-10 parts of a homogenizing agent; 2-6 parts of a processing aid; 1-3 parts of sulfur; 0.1-1.5 parts of accelerator TMTD; 1-3 parts of accelerator MBTS; 1-3 parts of accelerator ZDBC; 0-2 parts of accelerator DTDM.
2. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: IIR268 Mooney viscosity ML (1+8)125 ℃ 51, unsaturation 1.5%.
3. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: EPDM J2070 has an ethylene content of 57.8%, a Mooney viscosity of ML (1+4) at 125 ℃ of 44, an ENB content of 1.9%, and a weight average molecular weight of 38 to 40 ten thousand.
4. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: the homogenizing agent is Struktol 40MS Flakes.
5. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: the processing aid is one or two of WB42 or WB 16.
6. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: the carbon black is N774.
7. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: the white carbon black is Zeosil175 GR.
8. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: the paraffin oil is KP 6030.
9. The envelope sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer rubber according to claim 1, wherein: the anti-aging agent is one or two of RD or MB.
10. A method of making an envelope according to any one of claims 1 to 9, comprising the steps of:
(1) pre-plasticating the virgin rubber: putting the virgin rubber into an internal mixer for rubber breaking and pre-plastication for 30 s;
(2) adding auxiliary materials: adding all materials except the vulcanizing agent and the accelerator;
(3) cleaning: when the current of the internal mixer is stable and the temperature rises to 110-120 ℃, the materials flying at the feeding gate and the side wall of the internal mixer are swept into an internal mixing chamber, and the sweeping is carried out twice;
(4) rubber discharging: continuously mixing rubber, and discharging the rubber when the temperature reaches 145-155 ℃;
(5) and (3) filtering: filtering the rubber material in a rubber filter;
(6) b, Botong pill discharge: putting the rubber compound into an open mill, aerating, discharging, cooling, collecting and standing;
(7) adding a vulcanizing agent: putting the parked rubber compound into an internal mixer for hot refining, adding a vulcanizing agent and an accelerator, discharging rubber within 2min after uniform mixing, and controlling the temperature within 80 ℃;
(8) and (3) low-temperature Botong pill discharge: mixing the vulcanized rubber compound at low temperature by an open mill, slicing according to the process requirement, air cooling, standing and standby;
(9) and (3) molding by using a special rubber compression molding machine to obtain the encapsulating sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010024724.5A CN111117083A (en) | 2020-01-10 | 2020-01-10 | Encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer and preparation method thereof |
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|---|---|---|---|
| CN202010024724.5A CN111117083A (en) | 2020-01-10 | 2020-01-10 | Encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer and preparation method thereof |
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| CN111117083A true CN111117083A (en) | 2020-05-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250953A (en) * | 2020-10-14 | 2021-01-22 | 湖北迈可瑞橡塑有限公司 | High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof |
| CN113462089A (en) * | 2021-06-29 | 2021-10-01 | 沈阳化工大学 | Preparation method of white carbon black-containing butyl inner tube of truck |
| CN113912954A (en) * | 2021-09-30 | 2022-01-11 | 佳润科技(惠州)有限公司 | High-weather-resistance ethylene propylene diene monomer composite material and preparation method and application thereof |
-
2020
- 2020-01-10 CN CN202010024724.5A patent/CN111117083A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250953A (en) * | 2020-10-14 | 2021-01-22 | 湖北迈可瑞橡塑有限公司 | High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof |
| CN113462089A (en) * | 2021-06-29 | 2021-10-01 | 沈阳化工大学 | Preparation method of white carbon black-containing butyl inner tube of truck |
| CN113912954A (en) * | 2021-09-30 | 2022-01-11 | 佳润科技(惠州)有限公司 | High-weather-resistance ethylene propylene diene monomer composite material and preparation method and application thereof |
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