CN113185755A - Cushion rubber for retreading tire and production process thereof - Google Patents
Cushion rubber for retreading tire and production process thereof Download PDFInfo
- Publication number
- CN113185755A CN113185755A CN202110399215.5A CN202110399215A CN113185755A CN 113185755 A CN113185755 A CN 113185755A CN 202110399215 A CN202110399215 A CN 202110399215A CN 113185755 A CN113185755 A CN 113185755A
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- CN
- China
- Prior art keywords
- rubber
- retreading
- tire
- parts
- cushion rubber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 101
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 16
- 239000011787 zinc oxide Substances 0.000 claims abstract description 11
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 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
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 239000008117 stearic acid Substances 0.000 claims abstract description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 20
- 230000003078 antioxidant effect Effects 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000020169 heat generation Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract description 2
- 229920005610 lignin Polymers 0.000 abstract description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010920 waste tyre Substances 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a cushion rubber for retreading a tire and a production process thereof, wherein the cushion rubber comprises the following raw materials in parts by mass: 100 parts of natural rubber; 3-6 parts of zinc oxide; 1-3 parts of stearic acid; 10-20 parts of rubber oil; 30-60 parts of rubber reinforcing agent; 5-15 parts of resin; 1-3 parts of an anti-aging agent; 1-5 parts of an accelerator; 1-3 parts of sulfonic acid; 0.3-0.5 part of polar auxiliary agent; 0.5-0.8 part of modified alkali lignin. The cushion rubber for retreading the tire disclosed by the invention has good heat aging resistance, tearing resistance, low heat generation and high elasticity, and is beneficial to improving the quality of retreaded tires.
Description
Technical Field
The invention relates to the technical field of tire retreading, in particular to cushion rubber for tire retreading and a production process thereof.
Background
The tire retreading refers to a processing process of repairing and processing a worn or damaged tire with lost performance to enable the tire to have service performance again, is an active way for recycling waste tires, and has positive significance for saving and comprehensively utilizing penetrating resources, promoting the conversion of economic growth modes and sustainable development.
In the process of retreading a tire, a middle cushion rubber is needed, and the quality of the cushion rubber is directly related to the quality of the retreaded tire. The existing cushion rubber is not mature enough, the compression heat-reducing effect is not good, and other performances are required to be improved.
Disclosure of Invention
The invention aims to provide a cushion rubber for retreading a tire and a production process thereof aiming at overcoming the defects of the prior art and improving the performance of the cushion rubber and the service life of a retreaded tire.
In order to solve the technical problem, the cushion rubber for retreading the tire is provided, and comprises the following raw materials in parts by mass:
preferably, the zinc oxide is active zinc oxide with large specific surface area.
Preferably, the antioxidant comprises rubber antioxidant RE and rubber antioxidant DFC, which are mixed according to the weight ratio of 1: 1, and mixing the components in a ratio of 1.
Preferably, the rubber oil is a naphthenic rubber oil.
Preferably, the rubber reinforcing agent is formed by mixing carbon black and sericite according to the ratio of 3-5: 1.
The production process of the cushion rubber for retreading comprises the following steps:
i, primary mixing: adding natural rubber into an internal mixer, wherein the rotating speed of the internal mixer is 40-60 r/min, the pressure is 20-23 MPa, the weight is lifted for 55-60 s, then, adding 75-80% of rubber reinforcing agent, zinc oxide, stearic acid, resin, anti-aging agent and polar auxiliary agent, the pressure is 20-23 MPa, the weight is lifted when the temperature reaches 135-140 ℃, the pressure is continuously increased by 20-23 MPa, and the rubber is discharged when the temperature reaches 150-170 ℃;
II, two-stage mixing: adding a section of rubber compound into an internal mixer, pressing a top bolt for 30-40 s, lifting a weight, adding the rest rubber reinforcing agent, pressing the lifting weight for 30-40 s, continuously pressing for 20-23 MPa, and discharging rubber at 145-160 ℃;
III, a vulcanization process: and (3) putting the two-stage rubber compound into an internal mixer, adding the rest materials, pressurizing for 22-25 MPa, lifting for 20-40 s, and discharging rubber at 95-105 ℃.
The invention has the beneficial effects that:
the cushion rubber product produced by the invention has good heat aging resistance, tearing resistance, low heat generation and high elasticity, and is beneficial to improving the quality of retreaded tires.
The wear resistance of the cushion rubber can be improved by adding the modified alkali lignin, and the tearing resistance can be improved at the same time;
the rubber oil can improve the properties of elasticity, flexibility, easy processability and the like of natural rubber, so that the prepared cushion rubber has better ductility and tensile property;
sericite can partially replace carbon black, so that compression heat generation of a rubber material is reduced, the resilience performance is improved, the performance of the cushion rubber can be improved by controlling reasonable addition proportion, and the sericite is low in price, so that the production cost of the cushion rubber can be reduced while the performance of the cushion rubber is improved;
the polar auxiliary agent can improve the constant tensile force of the cushion rubber and reduce the heat generation of the rubber material, and has important significance on the performance and the service life of the cushion rubber;
the active zinc oxide with large specific surface area can increase the tensile strength of the cushion rubber, and reduce the elongation at break and heat generation.
Detailed Description
The technical solution will be clearly and completely described below with reference to some embodiments of the present invention.
Example 1
The cushion rubber for retreading the tire is characterized by comprising the following raw materials in parts by mass:
the anti-aging agent comprises rubber antioxidant RE and rubber antioxidant DFC, wherein the rubber antioxidant RE and the rubber antioxidant DFC are mixed according to the weight ratio of 1: 1 in proportion; the rubber reinforcing agent is formed by mixing carbon black and sericite according to the proportion of 3: 1.
The production process of the cushion rubber for retreading the tire, which is adopted by matching the provided raw materials, comprises the following steps:
i, primary mixing: adding natural rubber into an internal mixer, pressurizing at the rotating speed of 40r/min for 20MPa for 55s to lift the weight, then adding 75% of rubber reinforcing agent, zinc oxide, stearic acid, resin, an anti-aging agent and a polar auxiliary agent, pressurizing at 20MPa, lifting the weight when the temperature reaches 135 ℃, continuously pressurizing at 20MPa, and discharging rubber when the temperature reaches 150 ℃;
II, two-stage mixing: adding a section of rubber compound into an internal mixer, pressing a top bolt for 30s, lifting a weight, adding the rest rubber reinforcing agent, pressing the lifting weight for 30s, continuously pressing for 20MPa, and discharging rubber at 145 ℃;
III, a vulcanization process: and (3) putting the two-stage rubber compound into an internal mixer, adding the rest materials, pressurizing for 22MPa and lifting for 20s, and discharging rubber at 95 ℃.
Example 2
The cushion rubber for retreading the tire is characterized by comprising the following raw materials in parts by mass:
the anti-aging agent comprises rubber antioxidant RE and rubber antioxidant DFC, wherein the rubber antioxidant RE and the rubber antioxidant DFC are mixed according to the weight ratio of 1: 1 in proportion; the rubber reinforcing agent is formed by mixing carbon black and sericite according to the proportion of 4: 1.
The production process of the cushion rubber for retreading the tire, which is adopted by matching the provided raw materials, comprises the following steps:
i, primary mixing: adding natural rubber into an internal mixer, pressurizing at the rotating speed of 50r/min for 22MPa for 58s to lift the weight, then adding 78% of rubber reinforcing agent, zinc oxide, stearic acid, resin, an anti-aging agent and a polar auxiliary agent, pressurizing at 22MPa, lifting the weight when the temperature reaches 138 ℃, continuously pressurizing at 21MPa, and discharging rubber when the temperature reaches 165 ℃;
II, two-stage mixing: adding a section of rubber compound into an internal mixer, pressing a top bolt for 35s, lifting a weight, adding the rest rubber reinforcing agent, pressing the lifting weight for 35s, continuously pressing for 21MPa, and discharging rubber at 150 ℃;
III, a vulcanization process: adding the two-stage rubber compound into an internal mixer, adding the rest materials, pressurizing for 23MPa and lifting for 30s, and discharging rubber at 100 ℃.
Example 3
The cushion rubber for retreading the tire is characterized by comprising the following raw materials in parts by mass:
the anti-aging agent comprises rubber antioxidant RE and rubber antioxidant DFC, wherein the rubber antioxidant RE and the rubber antioxidant DFC are mixed according to the weight ratio of 1: 1 in proportion; the rubber reinforcing agent is formed by mixing carbon black and sericite according to the proportion of 5: 1.
The production process of the cushion rubber for retreading the tire, which is adopted by matching the provided raw materials, comprises the following steps:
i, primary mixing: adding natural rubber into an internal mixer, wherein the rotating speed of the internal mixer is 60r/min, pressurizing at 23MPa for 60s to lift the weight, then adding 80% of rubber reinforcing agent, zinc oxide, stearic acid, resin, an anti-aging agent and a polar auxiliary agent, pressurizing at 23MPa, lifting the weight when the temperature reaches 140 ℃, continuously pressurizing at 23MPa, and discharging rubber when the temperature reaches 170 ℃;
II, two-stage mixing: adding a section of rubber compound into an internal mixer, pressing a top bolt for 40s, lifting a weight, adding the rest rubber reinforcing agent, pressing the lifting weight for 40s, continuously pressing for 23MPa, and discharging rubber at 160 ℃;
III, a vulcanization process: and (3) putting the two-stage rubber compound into an internal mixer, adding the rest materials, pressurizing for 25MPa and lifting for 40s, and discharging rubber at 105 ℃.
The following table shows the results of the performance tests of the cushion gum prepared by the technical solutions disclosed in examples 1 to 3:
in conclusion, the cushion gum prepared by the technical scheme of the invention has obviously and easily excellent performance compared with the conventional cushion gum.
The above description is only a preferred embodiment of the calibration device for calibrating automobile parts disclosed in the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these are within the scope of the present invention.
Claims (6)
1. The cushion rubber for retreading the tire is characterized by comprising the following raw materials in parts by mass:
2. the cushion rubber for retreading a tire as claimed in claim 1, wherein: the zinc oxide is active zinc oxide with large specific surface area.
3. The cushion rubber for retreading a tire as claimed in claim 1, wherein: the antioxidant comprises rubber antioxidant RE and rubber antioxidant DFC, wherein the rubber antioxidant RE and the rubber antioxidant DFC are mixed according to the weight ratio of 1: 1, and mixing the components in a ratio of 1.
4. The cushion rubber for retreading a tire as claimed in claim 1, wherein: the rubber oil is naphthenic base rubber oil.
5. The cushion rubber for retreading a tire as claimed in claim 1, wherein: the rubber reinforcing agent is formed by mixing carbon black and sericite according to the proportion of 3-5: 1.
6. The process for producing a cushion rubber for retreading a tire according to claim 1, characterized by comprising the steps of:
i, primary mixing: adding natural rubber into an internal mixer, pressurizing at the rotating speed of 40-60 r/min for 20-23 MPa for 55-60 s, lifting, adding 75-80% of rubber reinforcing agent, zinc oxide, stearic acid, resin, anti-aging agent and polar auxiliary agent, pressurizing at 20-23 MPa, lifting when the temperature reaches 135-140 ℃, continuously pressurizing at 20-23 MPa, and discharging rubber when the temperature reaches 150-170 ℃;
II, two-stage mixing: adding a section of rubber compound into an internal mixer, wherein the rotating speed of the internal mixer is 60-80 r/min, pressing a top bolt for 30-40 s, lifting a weight, adding the rest rubber reinforcing agent, pressing the lifting weight for 30-40 s, and continuously pressing for 20-23 MPa to discharge rubber at 145-160 ℃;
III, a vulcanization process: and (3) putting the two-stage rubber compound into an internal mixer, adding the rest materials, pressurizing for 22-25 MPa, lifting for 20-40 s, and discharging rubber at 95-105 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399215.5A CN113185755A (en) | 2021-04-14 | 2021-04-14 | Cushion rubber for retreading tire and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399215.5A CN113185755A (en) | 2021-04-14 | 2021-04-14 | Cushion rubber for retreading tire and production process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113185755A true CN113185755A (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110399215.5A Pending CN113185755A (en) | 2021-04-14 | 2021-04-14 | Cushion rubber for retreading tire and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113185755A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387677A (en) * | 2013-07-19 | 2013-11-13 | 济南圣泉集团股份有限公司 | Preparation methods of lignin rubber additive and tyre rubber |
| WO2015109790A1 (en) * | 2014-01-23 | 2015-07-30 | 怡维怡橡胶研究院有限公司 | Composition from combination of trans-polyisoprene rubber and cis-polyisoprene rubber and process therefor |
| CN108250505A (en) * | 2018-01-29 | 2018-07-06 | 明光市奇美橡塑有限公司 | A kind of abrasion-resistant rubber beam |
-
2021
- 2021-04-14 CN CN202110399215.5A patent/CN113185755A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387677A (en) * | 2013-07-19 | 2013-11-13 | 济南圣泉集团股份有限公司 | Preparation methods of lignin rubber additive and tyre rubber |
| WO2015109790A1 (en) * | 2014-01-23 | 2015-07-30 | 怡维怡橡胶研究院有限公司 | Composition from combination of trans-polyisoprene rubber and cis-polyisoprene rubber and process therefor |
| CN108250505A (en) * | 2018-01-29 | 2018-07-06 | 明光市奇美橡塑有限公司 | A kind of abrasion-resistant rubber beam |
Non-Patent Citations (1)
| Title |
|---|
| 余力;戴慧新;: "云母的加工与应用" * |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210730 |
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| RJ01 | Rejection of invention patent application after publication |