CN115286845A - Syndiotactic 1, 2-polybutadiene rubber apex for tyre and preparation method thereof - Google Patents
Syndiotactic 1, 2-polybutadiene rubber apex for tyre and preparation method thereof Download PDFInfo
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- CN115286845A CN115286845A CN202210700951.4A CN202210700951A CN115286845A CN 115286845 A CN115286845 A CN 115286845A CN 202210700951 A CN202210700951 A CN 202210700951A CN 115286845 A CN115286845 A CN 115286845A
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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
- C08L7/00—Compositions of natural rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention relates to the technical field of tire preparation, and discloses syndiotactic 1, 2-polybutadiene rubber apex for a tire, which comprises the following raw materials in parts by weight: 100 parts of rubber composition, 5-30 parts of reinforcing resin, 2-8 parts of stearic acid, 5-10 parts of activator, 1-10 parts of anti-aging agent, 1-5 parts of accelerator, 0.1-1 part of anti-scorching agent, 2-10 parts of vulcanizing agent and 30-80 parts of carbon black; the apex prepared by the invention has excellent stiffness, overcomes the defect that long and thin apex is easy to deform, improves the production efficiency, and simultaneously ensures that the hardness of the vulcanized apex is the same as that of common apex.
Description
Technical Field
The invention relates to the technical field of tire preparation, in particular to syndiotactic 1, 2-polybutadiene rubber apex for a tire and a preparation method thereof.
Background
The tire apex is also called as apex rubber core, rubber filling strip and rubber core, is positioned at the upper part of the tire bead of the tire, is the main filler of the tire bead part, plays the roles of supporting the tire wall, buffering and rigidity transition, and endows the tire bead with shape, volume and stability. It is required to withstand large compression and shear deformation, so that the bead and sidewall are connected by a moderately hard apex to perform a slow transition function.
The prior art mentions that the bead lip uses longer bead filler and the bead filler thickness is reduced, and increases the bead filler height, can maintain controllability and comfortableness, and reduces rolling resistance. However, the long and thin bead filler has the advantages that the master rubber of the bead filler is easy to deform after being extruded, the bead filler can be inclined inwards due to the tension in the bead hot-sticking forming process, the bead filler can be quickly bent downwards under the action of gravity when being placed vertically, the bead filler is formed in the straight state, the bead filler is difficult to restore to the straight state without heat treatment, namely the stiffness is poor, and the capacity of resisting gravity to deform after the bead filler is pressed into a sheet is poor; in severe cases, the subsequent green tire forming process cannot be carried out, and only the waste treatment can be carried out, thereby affecting the production efficiency of enterprises and increasing the production cost.
In addition, part of tire enterprises improve the stiffness of the thin bead filler by introducing more reinforcing resin, but the hardness of the vulcanized bead filler is increased and exceeds the hardness design requirement of the bead filler; meanwhile, enterprises can adopt a flat mode to relieve the problem, but the working efficiency of workers is influenced to a certain extent.
Therefore, in order to ensure the convenience, safety and reliability of processing the thin and long triangular rubber, the technical staff in the field needs to solve the problem of how to improve the stiffness of the triangular rubber on the premise of not influencing the hardness of the vulcanized triangular rubber.
Disclosure of Invention
In view of the above, the invention provides a syndiotactic 1, 2-polybutadiene rubber apex for tires, which is mainly used for solving the technical problems that the hardness and stiffness of various apexes cannot be effectively balanced and the working efficiency is low.
The invention aims to provide a syndiotactic 1, 2-polybutadiene rubber apex for tires, which comprises the following raw materials in parts by weight: 100 parts of rubber composition, 5-30 parts of reinforcing resin, 2-8 parts of stearic acid, 5-10 parts of activator, 1-10 parts of anti-aging agent, 1-5 parts of accelerator, 0.1-1 part of anti-scorching agent, 2-10 parts of vulcanizing agent and 30-80 parts of carbon black;
the rubber composition at least comprises syndiotactic 1, 2-polybutadiene rubber, and the syndiotactic 1, 2-polybutadiene rubber is prepared by a plurality of Ziegler-Natta catalysts composed of metal elements such as titanium, vanadium, cobalt, chromium, molybdenum and iron.
Because a certain amount of syndiotactic ordered arrangement exists in the 1, 2-structure of syndiotactic 1, 2-polybutadiene rubber, ordered aggregation and crystallization are easy to occur, the crystallization temperature can be controlled within the range of 0-120 ℃, and the syndiotactic 1, 2-butadiene rubber is added to obtain the apex with crystallization capability.
Preferably, in the syndiotactic 1, 2-polybutadiene rubber apex for tires, the rubber composition comprises 5 to 100 parts of syndiotactic 1, 2-polybutadiene rubber, 0 to 100 parts of natural rubber and 0 to 100 parts of other rubber.
In the invention, after the syndiotactic-1, 2-butadiene rubber and the natural rubber are blended, the prepared rubber material has the advantages of effectively improved tear strength, aging resistance, fatigue resistance, abrasion resistance, flex resistance, dynamic heat generation and other mechanical properties.
Preferably, in the above syndiotactic 1, 2-polybutadiene rubber apex for tires, the other rubber is one or a mixture of more of reclaimed rubber, styrene-butadiene rubber, butadiene rubber and isoprene rubber.
Preferably, in the syndiotactic 1, 2-polybutadiene rubber apex for tires, the antioxidant is one or a mixture of more of antioxidant 4020NA, antioxidant H, antioxidant RD and antioxidant D.
Preferably, in the syndiotactic 1, 2-polybutadiene rubber apex for tires, the carbon black is one or a mixture of carbon black N330, carbon black N375 and carbon black N660.
Preferably, in the syndiotactic 1, 2-polybutadiene rubber apex for tires, the accelerator is one or more of an accelerator DZ, an accelerator CZ, an accelerator M and an accelerator DM.
Preferably, in the syndiotactic 1, 2-polybutadiene rubber apex for tires, the scorch retarder is a mixture of one or more of the scorch retarder CTP, the scorch retarder APR and the scorch retarder E.
Preferably, in the syndiotactic 1, 2-polybutadiene rubber apex for tires, the reinforcing resin is a phenolic resin; the active agent is zinc oxide; the vulcanizing agent is sulfur.
Preferably, in the above syndiotactic 1, 2-polybutadiene rubber apex for tires, the shore hardness of the apex is 60-100.
The invention also aims to provide a preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for the tire, which comprises the following steps:
(1) First-stage mixing: adding natural rubber and other rubbers into an open mill or an internal mixer, plasticating for 90s, adding syndiotactic 1, 2-polybutadiene rubber, plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (3) second-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing for 2-10min in an open mill or an internal mixer;
(3) Extruding and forming triangular glue: and (3) storing the rubber material subjected to two-stage mixing for 12-48h at room temperature, and then putting the rubber material into an extruder to extrude a triangular rubber strip.
The invention provides a syndiotactic 1, 2-polybutadiene rubber apex for tires, which has the following beneficial effects compared with the prior art:
the invention prepares the triangular glue with crystallization capability by adopting the blending of the syndiotactic 1, 2-polybutadiene rubber, the natural rubber, other rubbers and other raw materials and based on the capability of the syndiotactic 1, 2-polybutadiene rubber to crystallize and harden at a certain temperature;
the apex prepared by the invention has excellent stiffness, overcomes the defect that long and thin apex is easy to deform, improves the production efficiency, and simultaneously ensures that the hardness of the vulcanized apex is the same as that of common apex.
Drawings
FIG. 1 is a graph showing a comparison of the bending angles of the apex (left) of example 1 and the apex (right) of comparative example 1;
FIG. 2 is a graph showing a comparison of the bending angles of the apex (left) of example 1 and the apex (right) of comparative example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The syndiotactic 1, 2-polybutadiene rubber apex for the tire comprises the following raw materials in parts by weight: 10 parts of syndiotactic 1, 2-polybutadiene rubber, 70 parts of natural rubber, 20 parts of butadiene rubber, 5 parts of stearic acid, 8 parts of zinc oxide, 5 parts of an anti-aging agent 4020NA, 3 parts of an accelerator DZ, 0.5 part of a scorch retarder CTP, 6 parts of sulfur, 50 parts of carbon black N330 and 20 parts of phenolic resin.
The preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for tires in this example is as follows:
(1) First-stage mixing: adding natural rubber and other rubber into an open mill or an internal mixer, plasticating for 90s, adding syndiotactic 1, 2-polybutadiene rubber, plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (3) second-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing in an open mill or an internal mixer for 2-10min at the mixing temperature of not more than 120 ℃ to obtain a mixing master batch;
(3) Extruding and forming triangular glue: and (3) storing the mixed masterbatch obtained in the step (2) at room temperature for 12-48h, then placing the mixed masterbatch into an extruder, setting the extrusion temperature of the extruder to be 80-100 ℃, and extruding to obtain the triangular rubber strip.
Example 2
A syndiotactic 1, 2-polybutadiene rubber apex for tires comprises the following raw materials in parts by weight: 20 parts of syndiotactic 1, 2-polybutadiene rubber, 60 parts of natural rubber, 20 parts of butadiene styrene rubber, 3 parts of stearic acid, 5 parts of zinc oxide, 1 part of anti-aging agent H, 1 part of accelerator CZ, 0.1 part of antiscorching agent APR, 2 parts of sulfur, 30 parts of carbon black N375 and 5 parts of phenolic resin.
The preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for the tire in the embodiment is as follows:
(1) First-stage mixing: adding natural rubber and other rubbers into an open mill or an internal mixer, plasticating for 90s, adding syndiotactic 1, 2-polybutadiene rubber, plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (3) second-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing in an open mill or an internal mixer for 2-10min at the mixing temperature of not more than 120 ℃ to obtain a mixing master batch;
(3) Extruding and molding the triangular glue: and (3) storing the mixed masterbatch obtained in the step (2) at room temperature for 12-48h, putting the mixed masterbatch into an extruder, setting the extrusion temperature of the extruder to be 80-100 ℃, and extruding to obtain the triangular rubber strip.
Example 3
The syndiotactic 1, 2-polybutadiene rubber apex for the tire comprises the following raw materials in parts by weight: 30 parts of syndiotactic 1, 2-polybutadiene rubber, 50 parts of natural rubber, 20 parts of isoprene rubber, 8 parts of stearic acid, 10 parts of zinc oxide, 10 parts of an anti-aging agent RD, 0.8 part of an accelerator M, 1 part of a scorch retarder E, 10 parts of sulfur, 80 parts of carbon black N660 and 30 parts of phenolic resin.
The preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for the tire in the embodiment is as follows:
(1) First-stage mixing: adding natural rubber and other rubbers into an open mill or an internal mixer, plasticating for 90s, adding syndiotactic 1, 2-polybutadiene rubber, plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (3) second-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing in an open mill or an internal mixer for 2-10min at the mixing temperature of not more than 120 ℃ to obtain a mixing master batch;
(3) Extruding and molding the triangular glue: and (3) storing the mixed masterbatch obtained in the step (2) at room temperature for 12-48h, putting the mixed masterbatch into an extruder, setting the extrusion temperature of the extruder to be 80-100 ℃, and extruding to obtain the triangular rubber strip.
Example 4
The syndiotactic 1, 2-polybutadiene rubber apex for the tire comprises the following raw materials in parts by weight: 10 parts of syndiotactic 1, 2-polybutadiene rubber, 70 parts of natural rubber, 20 parts of butadiene rubber, 5 parts of stearic acid, 8 parts of zinc oxide, 3 parts of anti-aging agent 4020NA, 2 parts of anti-aging agent D, 2 parts of accelerator DZ, 1 part of accelerator DM, 0.4 part of scorch retarder CTP, 0.1 part of scorch retarder APR, 6 parts of sulfur, 20 parts of carbon black N330, 20 parts of carbon black N375, 10 parts of carbon black N660 and 20 parts of phenolic resin.
The preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for the tire in the embodiment is as follows:
(1) First-stage mixing: adding natural rubber and other rubber into an open mill or an internal mixer, plasticating for 90s, adding syndiotactic 1, 2-polybutadiene rubber, plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (2) two-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing in an open mill or an internal mixer for 2-10min at the mixing temperature of not more than 120 ℃ to obtain a mixing master batch;
(3) Extruding and molding the triangular glue: and (3) storing the mixed masterbatch obtained in the step (2) at room temperature for 12-48h, putting the mixed masterbatch into an extruder, setting the extrusion temperature of the extruder to be 80-100 ℃, and extruding to obtain the triangular rubber strip.
Example 5
The syndiotactic 1, 2-polybutadiene rubber apex for the tire comprises the following raw materials in parts by weight: 100 parts of syndiotactic 1, 2-polybutadiene rubber, 8 parts of stearic acid, 10 parts of zinc oxide, 10 parts of an anti-aging agent RD, 0.8 part of an accelerator M, 1 part of a scorch retarder E, 10 parts of sulfur, 80 parts of carbon black N660 and 30 parts of phenolic resin.
The preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for the tire in the embodiment is as follows:
(1) First-stage mixing: adding syndiotactic 1, 2-polybutadiene rubber into an open mill or an internal mixer for plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (2) two-stage mixing: adding a vulcanizing agent and an accelerant into the rubber material discharged in the step (1), and mixing in an open mill or an internal mixer for 2-10min at the mixing temperature of not more than 120 ℃ to obtain mixed masterbatch;
(3) Extruding and molding the triangular glue: and (3) storing the mixed masterbatch obtained in the step (2) at room temperature for 12-48h, putting the mixed masterbatch into an extruder, setting the extrusion temperature of the extruder to be 80-100 ℃, and extruding to obtain the triangular rubber strip.
Comparative example 1
The syndiotactic 1, 2-polybutadiene rubber apex for the tire comprises the following raw materials in parts by weight: 80 parts of natural rubber, 20 parts of butadiene rubber, 5 parts of stearic acid, 8 parts of zinc oxide, 5 parts of anti-aging agent 4020NA, 3 parts of accelerator DZ, 0.5 part of anti-scorching agent CTP, 6 parts of sulfur, 50 parts of carbon black N330 and 20 parts of phenolic resin.
The preparation method of the syndiotactic 1, 2-polybutadiene rubber apex for the tire of this comparative example is as follows:
(1) First-stage mixing: adding natural rubber and butadiene rubber into an open mill or an internal mixer, plasticating for 90s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (2) two-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing in an open mill or an internal mixer for 2-10min at the mixing temperature of not more than 120 ℃ to obtain a mixing master batch;
(3) Extruding and forming triangular glue: and (3) storing the mixed masterbatch obtained in the step (2) at room temperature for 12-48h, then placing the mixed masterbatch into an extruder, setting the extrusion temperature of the extruder to be 80-100 ℃, and extruding to obtain the triangular rubber strip.
The tires prepared in examples 1 to 5 and comparative example 1 were further treated with syndiotactic 1, 2-polybutadiene rubber apex, the apex was cooled to 80 ℃ or less, and then hot-laminated with a bead ring for molding, molding and vulcanization of a tire blank were completed according to molding and vulcanization processes of respective tire specifications, and the molded blank was subjected to a performance test, and the physical properties of examples 1 to 5 and comparative example 1 were given in table 1, wherein the values obtained for the tire blank prepared from the apex of comparative example 1 were taken as a reference and confirmed to be 100%.
Table 1 results of performance testing
As can be seen from the performance test results in Table 1, the variation range of each performance of the tire blank can be maintained within 10% under the condition of controlling the amount of the 1,2 polybutadiene rubber in a certain proportion, wherein the hardness of the example 1-5 is not changed, the requirement of the tire apex hardness index is ensured, and the use safety of the tire can be effectively ensured through national standards of high speed, durability, strength and knocking-off of the tire.
The bending angle of the bead apex determines the stiffness of the bead apex, and specifically, the smaller the bending angle of the bead apex, the better the stiffness of the bead apex. In order to better represent the performance changes of the apex before and after the improvement of the embodiment and the comparative example, referring to fig. 1-2, the bead prepared by the apex of the embodiment 1 and the bead prepared by the comparative example 1 are respectively shown, and it is obvious that after the syndiotactic 1,2 polybutadiene rubber is introduced, the bending degree of the bead apex of the embodiment 1 caused by gravity is obviously improved, the bending angle is changed from 75 degrees to 40 degrees of the comparative example 1, the bending angle is reduced by 47 degrees, and the stiffness of the apex of the embodiment is obviously improved.
The invention prepares the triangular glue with crystallization capability by adopting the syndiotactic-1, 2-butadiene rubber, natural rubber, other rubbers and other ingredients for proportioning and properly adjusting the production process based on the crystallization and hardening capability of the syndiotactic-1, 2-butadiene rubber at a certain temperature; the prepared triangular glue has excellent stiffness, the defect that the long and double thin triangular glue is easy to deform is overcome, the production efficiency is improved, the hardness of the vulcanized triangular glue is the same as that of the common triangular glue, the method is suitable for the triangular glue with various hardness, and particularly, the stiffness effect of the long and thin triangular glue is improved more obviously.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the scheme disclosed by the embodiment, the scheme corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The syndiotactic 1, 2-polybutadiene rubber apex for the tire is characterized by comprising the following raw materials in parts by weight: 100 parts of rubber composition, 5-30 parts of reinforcing resin, 2-8 parts of stearic acid, 5-10 parts of active agent, 1-10 parts of anti-aging agent, 1-5 parts of accelerator, 0.1-1 part of scorch retarder, 2-10 parts of vulcanizing agent and 30-80 parts of carbon black;
the rubber composition includes at least syndiotactic 1, 2-polybutadiene rubber.
2. The syndiotactic 1, 2-polybutadiene rubber apex for tires according to claim 1, wherein the rubber composition comprises 5 to 100 parts of syndiotactic 1, 2-polybutadiene rubber, 0 to 100 parts of natural rubber, and 0 to 100 parts of other rubber.
3. The syndiotactic 1, 2-polybutadiene rubber apex for tires according to claim 2, wherein the other rubber is one or more of a blend of recycled rubber, styrene-butadiene rubber, isoprene rubber.
4. The syndiotactic 1, 2-polybutadiene rubber apex for tires according to claim 1, wherein the antioxidant is a mixture of one or more of antioxidant 4020NA, antioxidant H, antioxidant RD and antioxidant D.
5. The syndiotactic 1, 2-polybutadiene rubber apex for a tire as in claim 1, wherein the carbon black is a mixture of one or more of carbon black N330, carbon black N375, and carbon black N660.
6. The syndiotactic 1, 2-polybutadiene rubber apex for tires according to claim 1, wherein the accelerator is a mixture of one or more of accelerator DZ, accelerator CZ, accelerator M, and accelerator DM.
7. The syndiotactic 1, 2-polybutadiene rubber apex for tire according to claim 1, wherein the scorch retarder is a mixture of one or more of scorch retarder CTP, scorch retarder APR and scorch retarder E.
8. The syndiotactic 1, 2-polybutadiene rubber apex for a tire as in claim 1, wherein the reinforcing resin is a phenolic resin; the active agent is zinc oxide; the vulcanizing agent is sulfur.
9. A syndiotactic 1, 2-polybutadiene rubber apex for a tire according to any one of claims 1-8, wherein the apex has a Shore hardness of 60-100.
10. A process for preparing syndiotactic 1, 2-polybutadiene rubber apex for tires according to any one of claims 1 to 9, comprising the steps of:
(1) First-stage mixing: adding natural rubber and other rubber into an open mill or an internal mixer, plasticating for 90s, adding syndiotactic 1, 2-polybutadiene rubber, plasticating for 30s, adding reinforcing resin, stearic acid, an active agent, an anti-aging agent, an anti-scorching agent and carbon black, mixing for 2-10min, and discharging rubber;
(2) And (3) second-stage mixing: adding a vulcanizing agent and an accelerator into the rubber material discharged in the step (1), and mixing for 2-10min in an open mill or an internal mixer;
(3) Extruding and forming triangular glue: and (3) storing the rubber material subjected to two-stage mixing for 12-48h at room temperature, and then putting the rubber material into an extruder to extrude a triangular rubber strip.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622133A (en) * | 2023-05-19 | 2023-08-22 | 中策橡胶集团股份有限公司 | Rubber composition of tire triangular rubber, mixing method and tire |
| CN117186511A (en) * | 2023-06-11 | 2023-12-08 | 山东玲珑轮胎股份有限公司 | Rubber composition and application thereof |
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| US5859142A (en) * | 1993-09-29 | 1999-01-12 | Sumitomo Rubber Industries, Ltd. | Rubber composition for reinforcing bead of tires which contains butadiene rubber with syndiotactic crystals, carbon black, sulfur and sulfenamide accelerator |
| CN101353452A (en) * | 2007-07-26 | 2009-01-28 | 住友橡胶工业株式会社 | Rubber composition and run flat tire using the same |
| CN101676323A (en) * | 2008-09-19 | 2010-03-24 | 住友橡胶工业株式会社 | Rubber composition for tire |
| CN105501001A (en) * | 2014-10-14 | 2016-04-20 | 固特异轮胎和橡胶公司 | Pre-formed apex rubber core/bead composite and tire with composite |
| CN105501000A (en) * | 2014-10-14 | 2016-04-20 | 固特异轮胎和橡胶公司 | Preparation of apex rubber core/bead composite and tire with composite |
| CN106832446A (en) * | 2017-01-06 | 2017-06-13 | 四川轮胎橡胶（集团）股份有限公司 | A kind of triangle rubber and preparation method thereof |
| CN108192156A (en) * | 2017-12-06 | 2018-06-22 | 福建省海安橡胶有限公司 | Triangle rubber sizing material and preparation method under a kind of all-steel giant-scale engineering radial |
| CN109161063A (en) * | 2018-08-31 | 2019-01-08 | 正新橡胶（中国）有限公司 | Bead apex rubber composition and preparation method thereof |
| CN111171396A (en) * | 2020-02-23 | 2020-05-19 | 广西玲珑轮胎有限公司 | Tread rubber material of tire for semi-steel ice-snow road surface |
| CN113861525A (en) * | 2021-11-22 | 2021-12-31 | 三角轮胎股份有限公司 | Apex composition and all-steel radial tire thereof |
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| CN116622133A (en) * | 2023-05-19 | 2023-08-22 | 中策橡胶集团股份有限公司 | Rubber composition of tire triangular rubber, mixing method and tire |
| CN117186511A (en) * | 2023-06-11 | 2023-12-08 | 山东玲珑轮胎股份有限公司 | Rubber composition and application thereof |
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