CN111423638A - High-strength rubber composite material for high-speed rail sealing element and preparation method thereof - Google Patents
High-strength rubber composite material for high-speed rail sealing element and preparation method thereof Download PDFInfo
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- CN111423638A CN111423638A CN202010255116.5A CN202010255116A CN111423638A CN 111423638 A CN111423638 A CN 111423638A CN 202010255116 A CN202010255116 A CN 202010255116A CN 111423638 A CN111423638 A CN 111423638A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a high-strength rubber composite material for a high-speed rail sealing element, which comprises the following raw materials in parts by weight: 55-68 parts of nitrile rubber, 20-26 parts of natural rubber, 9-12 parts of phenylene ether silicone rubber, 5-7 parts of maleic anhydride grafted polyethylene, 4-7 parts of white carbon black, 0.5-0.8 part of aluminum oxide, 1-1.4 parts of zinc oxide, 0.07-0.09 part of toluene diisocyanate, 2.5-4.5 parts of an anti-aging agent, 2-4 parts of a heat stabilizer and 2-4 parts of a cross-linking agent. The high-strength rubber composite material for the high-speed rail sealing element has good sealing performance, high tensile strength and excellent mechanical property; in addition, the anti-aging performance is good, and the service life is long.
Description
Technical Field
The invention relates to the technical field of high-speed rail sealing element materials, in particular to a high-strength rubber composite material for a high-speed rail sealing element and a preparation method thereof.
Background
The rubber is elastic, insulating, waterproof and air-proof material prepared from latex of plants such as rubber tree and rubber grass. A high-elasticity polymer compound. It is divided into two types of natural rubber and synthetic rubber. The natural rubber is prepared by extracting colloid from plants such as rubber tree and rubber grass and processing; synthetic rubbers are obtained by polymerization of various monomers. The rubber product has unique performance, so that the rubber is a better raw material for manufacturing the sealing ring.
The rubber sealing element is a general basic element in a sealing device, is a rubber product widely applied in the sealing technology, and is widely suitable for being installed on various mechanical equipment due to the advantages of small elastic modulus, high elongation, air permeability resistance and the like. In the working environment, the lubricating system of mechanical equipment contains acid and alkali components, which easily permeate into the sealing element to cause the expansion of the sealing element, thus affecting the service life of the sealing element, moreover, the long-term severe working environment, such as high temperature and high pressure, accelerates the damage rate of the sealing element, the replacement cycle of the sealing element is short, and troubles are brought to the continuous production of enterprises.
However, the rubber sealing materials used at present have the following problems:
1. the tensile strength is low, the mechanical property is not good, and the mechanical property requirements in the fields of high-speed rail sealing elements and the like cannot be met;
2. poor aging resistance, poor elasticity, high compression set, poor high temperature resistance and the like, and poor comprehensive performance.
Based on the situation, the invention provides a high-strength rubber composite material for a high-speed rail sealing element and a preparation method thereof, and the problems can be effectively solved.
Disclosure of Invention
The invention aims to provide a high-strength rubber composite material for a high-speed rail sealing element and a preparation method thereof. The high-strength rubber composite material for the high-speed rail sealing element is prepared by selecting raw materials, optimizing the content of each raw material and selecting nitrile rubber, natural rubber, phenylene ether silicon rubber, maleic anhydride grafted polyethylene, white carbon black, aluminum oxide, zinc oxide, toluene diisocyanate, an anti-aging agent, a heat stabilizer and a crosslinking agent in a proper ratio, so that the high-strength rubber composite material for the high-speed rail sealing element has good sealing performance, high tensile strength and excellent mechanical property; in addition, the anti-aging performance is good, and the service life is long.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a high-strength rubber composite material for a high-speed rail sealing element comprises the following raw materials in parts by weight:
55-68 parts of nitrile rubber,
20-26 parts of natural rubber,
9-12 parts of phenylate phenylene silicone rubber,
5-7 parts of maleic anhydride grafted polyethylene,
4-7 parts of white carbon black,
0.5-0.8 part of aluminum oxide,
1-1.4 parts of zinc oxide,
0.07 to 0.09 part of toluene diisocyanate,
2.5 to 4.5 parts of anti-aging agent,
2-4 parts of heat stabilizer,
2-4 parts of a cross-linking agent.
The high-strength rubber composite material for the high-speed rail sealing element is prepared by selecting raw materials, optimizing the content of each raw material and selecting nitrile rubber, natural rubber, phenylene ether silicon rubber, maleic anhydride grafted polyethylene, white carbon black, aluminum oxide, zinc oxide, toluene diisocyanate, an anti-aging agent, a heat stabilizer and a crosslinking agent in a proper ratio, so that the high-strength rubber composite material for the high-speed rail sealing element has good sealing performance, high tensile strength and excellent mechanical property; in addition, the anti-aging performance is good, and the service life is long.
Preferably, the high-strength rubber composite material for the high-speed rail sealing element comprises the following raw materials in parts by weight:
61 parts of nitrile rubber,
23 parts of natural rubber,
11 parts of phenylate phenylene silicone rubber,
6 parts of maleic anhydride grafted polyethylene,
5.5 parts of white carbon black,
0.65 part of aluminum oxide,
1.2 parts of zinc oxide,
0.08 portion of toluene diisocyanate,
3 portions of anti-aging agent,
3 parts of heat stabilizer,
3 parts of a crosslinking agent.
Preferably, the crosslinking agent is a mixture of zinc peroxide and a rubber crosslinking agent VP-4L.
Preferably, the mass ratio of the crosslinking agent to the rubber crosslinking agent VP-4L in the mixture of the crosslinking agent and the rubber crosslinking agent VP-4L is 1: 2.5-3.2.
Preferably, the anti-aging agent is an anti-aging agent 4010.
Preferably, the heat stabilizer is stearic acid.
Preferably, the alumina is nano alumina.
Preferably, the zinc oxide is nano zinc oxide.
The invention also provides a preparation method of the high-strength rubber composite material for the high-speed rail sealing element, which comprises the following steps:
1) feeding natural rubber into an internal mixer, masticating for 10-15 min at the temperature of 140-150 ℃, and discharging; storing the masticated natural rubber at room temperature for more than 48h for later use;
2) mixing the nitrile rubber, the natural rubber subjected to mastication in the step 1), the phenylene ether silicone rubber and the maleic anhydride grafted polyethylene in an open mill, and uniformly mixing to obtain mixed silicone rubber;
3) feeding the mixed silicon rubber into an internal mixer, adding white carbon black, aluminum oxide, zinc oxide, an anti-aging agent and a heat stabilizer, and mixing for 10-15 min at the temperature of 103-108 ℃; then continuously mixing for 8-12 min at the temperature of 113-118 ℃; then, cooling to 108-110 ℃, adding toluene diisocyanate and a cross-linking agent, and continuously mixing for 8-10 min; then discharging rubber, turning over by an open mill, then discharging and cooling;
4) carrying out calendering molding on the cooled rubber material in the step 3) by a calender;
5) feeding the semi-finished product subjected to calendaring molding into a 75-80 ℃ oven for preheating;
6) and putting the preheated rubber material into the mold cavity, uniformly and radially arranging according to the rolling direction of the rubber material, and feeding the rubber material into a flat vulcanizing machine for vulcanization to obtain the anti-aging silicone rubber sealing material.
The high-strength rubber composite material for the high-speed rail sealing element is mainly used as a sealing material, such as a sealing ring and the like, and the application field of the high-strength rubber composite material is not limited to the field of sealing materials, and can also be used in other fields.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the high-strength rubber composite material for the high-speed rail sealing element is prepared by selecting raw materials, optimizing the content of each raw material and selecting nitrile rubber, natural rubber, phenylene ether silicon rubber, maleic anhydride grafted polyethylene, white carbon black, aluminum oxide, zinc oxide, toluene diisocyanate, an anti-aging agent, a heat stabilizer and a crosslinking agent in a proper ratio, so that the high-strength rubber composite material for the high-speed rail sealing element has good sealing performance, high tensile strength and excellent mechanical property; in addition, the anti-aging performance is good, and the service life is long.
The high-strength rubber composite material for the high-speed rail sealing element is prepared by adding the phenylate phenylene rubber in a proper proportion into raw materials, and the raw materials are matched with the nitrile rubber and the natural rubber to serve as a composite base material, so that good mechanical properties such as high tensile strength are guaranteed;
the white carbon black and the aluminum oxide in proper proportion are added into the raw materials of the high-strength rubber composite material for the high-speed rail sealing element, so that the strength of the high-strength rubber composite material for the high-speed rail sealing element is further improved;
in the raw material system of the high-strength rubber composite material for the high-speed rail sealing element, the isocyanate group in the toluene diisocyanate can react with active groups such as hydroxyl, carboxyl and the like in other components to generate crosslinking, so that the small molecule residue in the product is reduced, the resilience of the product can be improved, the compression permanent deformation rate is reduced, and the aging resistance (mainly oil resistance and high temperature precipitation resistance) of the product is improved.
The high-strength rubber composite material for the high-speed rail sealing element is prepared by adding a proper proportion of a cross-linking agent into raw materials of the high-strength rubber composite material for the high-speed rail sealing element, preferably, the cross-linking agent is a mixture of zinc peroxide and a rubber cross-linking agent VP-4L, preferably, the cross-linking agent is a mixture of the zinc peroxide and the rubber cross-linking agent VP-4L, the mass ratio of the zinc peroxide to the rubber cross-linking agent VP-4L is 1: 2.5-3.2, the product can be better cross-linked, a good network cross-linked body can be obtained, the resilience performance of the product can be improved, and the compression permanent deformation rate can be reduced.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a high-strength rubber composite material for a high-speed rail sealing element comprises the following raw materials in parts by weight:
55-68 parts of nitrile rubber,
20-26 parts of natural rubber,
9-12 parts of phenylate phenylene silicone rubber,
5-7 parts of maleic anhydride grafted polyethylene,
4-7 parts of white carbon black,
0.5-0.8 part of aluminum oxide,
1-1.4 parts of zinc oxide,
0.07 to 0.09 part of toluene diisocyanate,
2.5 to 4.5 parts of anti-aging agent,
2-4 parts of heat stabilizer,
2-4 parts of a cross-linking agent.
Preferably, the high-strength rubber composite material for the high-speed rail sealing element comprises the following raw materials in parts by weight:
61 parts of nitrile rubber,
23 parts of natural rubber,
11 parts of phenylate phenylene silicone rubber,
6 parts of maleic anhydride grafted polyethylene,
5.5 parts of white carbon black,
0.65 part of aluminum oxide,
1.2 parts of zinc oxide,
0.08 portion of toluene diisocyanate,
3 portions of anti-aging agent,
3 parts of heat stabilizer,
3 parts of a crosslinking agent.
Preferably, the crosslinking agent is a mixture of zinc peroxide and a rubber crosslinking agent VP-4L.
Preferably, the mass ratio of the crosslinking agent to the rubber crosslinking agent VP-4L in the mixture of the crosslinking agent and the rubber crosslinking agent VP-4L is 1: 2.5-3.2.
Preferably, the anti-aging agent is an anti-aging agent 4010.
Preferably, the heat stabilizer is stearic acid.
Preferably, the alumina is nano alumina.
Preferably, the zinc oxide is nano zinc oxide.
The invention also provides a preparation method of the high-strength rubber composite material for the high-speed rail sealing element, which comprises the following steps:
1) feeding natural rubber into an internal mixer, masticating for 10-15 min at the temperature of 140-150 ℃, and discharging; storing the masticated natural rubber at room temperature for more than 48h for later use;
2) mixing the nitrile rubber, the natural rubber subjected to mastication in the step 1), the phenylene ether silicone rubber and the maleic anhydride grafted polyethylene in an open mill, and uniformly mixing to obtain mixed silicone rubber;
3) feeding the mixed silicon rubber into an internal mixer, adding white carbon black, aluminum oxide, zinc oxide, an anti-aging agent and a heat stabilizer, and mixing for 10-15 min at the temperature of 103-108 ℃; then continuously mixing for 8-12 min at the temperature of 113-118 ℃; then, cooling to 108-110 ℃, adding toluene diisocyanate and a cross-linking agent, and continuously mixing for 8-10 min; then discharging rubber, turning over by an open mill, then discharging and cooling;
4) carrying out calendering molding on the cooled rubber material in the step 3) by a calender;
5) feeding the semi-finished product subjected to calendaring molding into a 75-80 ℃ oven for preheating;
6) and putting the preheated rubber material into the mold cavity, uniformly and radially arranging according to the rolling direction of the rubber material, and feeding the rubber material into a flat vulcanizing machine for vulcanization to obtain the anti-aging silicone rubber sealing material.
Example 2:
a high-strength rubber composite material for a high-speed rail sealing element comprises the following raw materials in parts by weight:
55 parts of nitrile rubber,
20 portions of natural rubber,
9 parts of phenylate phenylene silicone rubber,
5 parts of maleic anhydride grafted polyethylene,
4 portions of white carbon black,
0.5 part of aluminum oxide,
1 part of zinc oxide,
0.07 part of toluene diisocyanate,
2.5 parts of anti-aging agent,
2 portions of heat stabilizer,
And 2 parts of a crosslinking agent.
In this example, the crosslinking agent is a mixture of zinc peroxide and a rubber crosslinking agent VP-4L.
In the embodiment, the mass ratio of the crosslinking agent zinc peroxide to the rubber crosslinking agent VP-4L in the mixture of the crosslinking agent zinc peroxide and the rubber crosslinking agent VP-4L is 1: 2.5.
In this embodiment, the anti-aging agent is an anti-aging agent 4010.
In this example, the thermal stabilizer is stearic acid.
In this embodiment, the alumina is nano alumina.
In this embodiment, the zinc oxide is nano zinc oxide.
In this embodiment, the preparation method of the high-strength rubber composite material for the high-speed rail sealing member includes the following steps:
1) feeding natural rubber into an internal mixer, masticating for 15min at the temperature of 140 ℃, and discharging; storing the masticated natural rubber at room temperature for more than 48h for later use;
2) mixing the nitrile rubber, the natural rubber subjected to mastication in the step 1), the phenylene ether silicone rubber and the maleic anhydride grafted polyethylene in an open mill, and uniformly mixing to obtain mixed silicone rubber;
3) feeding the mixed silicon rubber into an internal mixer, adding white carbon black, aluminum oxide, zinc oxide, an anti-aging agent and a heat stabilizer, and mixing for 15min at the temperature of 103 ℃; then continuously mixing for 12min at the temperature of 113 ℃; then, cooling to 108 ℃, adding toluene diisocyanate and a cross-linking agent, and continuously mixing for 10 min; then discharging rubber, turning over by an open mill, then discharging and cooling;
4) carrying out calendering molding on the cooled rubber material in the step 3) by a calender;
5) sending the semi-finished product subjected to calendaring molding into a 75 ℃ oven for preheating;
6) and putting the preheated rubber material into the mold cavity, uniformly and radially arranging according to the rolling direction of the rubber material, and feeding the rubber material into a flat vulcanizing machine for vulcanization to obtain the anti-aging silicone rubber sealing material.
Example 3:
a high-strength rubber composite material for a high-speed rail sealing element comprises the following raw materials in parts by weight:
68 parts of nitrile rubber,
26 parts of natural rubber,
12 parts of phenylate phenylene silicon rubber,
7 parts of maleic anhydride grafted polyethylene,
7 portions of white carbon black,
0.8 part of aluminum oxide,
1.4 parts of zinc oxide,
0.09 part of toluene diisocyanate,
4.5 portions of anti-aging agent,
4 portions of heat stabilizer,
4 parts of a crosslinking agent.
In this example, the crosslinking agent is a mixture of zinc peroxide and a rubber crosslinking agent VP-4L.
In the embodiment, the mass ratio of the crosslinking agent zinc peroxide to the rubber crosslinking agent VP-4L in the mixture of the crosslinking agent zinc peroxide and the rubber crosslinking agent VP-4L is 1: 3.2.
In this embodiment, the anti-aging agent is an anti-aging agent 4010.
In this example, the thermal stabilizer is stearic acid.
In this embodiment, the alumina is nano alumina.
In this embodiment, the zinc oxide is nano zinc oxide.
In this embodiment, the preparation method of the high-strength rubber composite material for the high-speed rail sealing member includes the following steps:
1) feeding natural rubber into an internal mixer, masticating for 10min at the temperature of 150 ℃, and discharging; storing the masticated natural rubber at room temperature for more than 48h for later use;
2) mixing the nitrile rubber, the natural rubber subjected to mastication in the step 1), the phenylene ether silicone rubber and the maleic anhydride grafted polyethylene in an open mill, and uniformly mixing to obtain mixed silicone rubber;
3) feeding the mixed silicon rubber into an internal mixer, adding white carbon black, aluminum oxide, zinc oxide, an anti-aging agent and a heat stabilizer, and mixing for 10min at the temperature of 108 ℃; then continuously mixing for 8min at the temperature of 118 ℃; then, cooling to the temperature of 110 ℃, adding toluene diisocyanate and a cross-linking agent, and continuously mixing for 8 min; then discharging rubber, turning over by an open mill, then discharging and cooling;
4) carrying out calendering molding on the cooled rubber material in the step 3) by a calender;
5) sending the semi-finished product subjected to calendaring molding into an oven at 80 ℃ for preheating;
6) and putting the preheated rubber material into the mold cavity, uniformly and radially arranging according to the rolling direction of the rubber material, and feeding the rubber material into a flat vulcanizing machine for vulcanization to obtain the anti-aging silicone rubber sealing material.
Example 4:
a high-strength rubber composite material for a high-speed rail sealing element comprises the following raw materials in parts by weight:
61 parts of nitrile rubber,
23 parts of natural rubber,
11 parts of phenylate phenylene silicone rubber,
6 parts of maleic anhydride grafted polyethylene,
5.5 parts of white carbon black,
0.65 part of aluminum oxide,
1.2 parts of zinc oxide,
0.08 portion of toluene diisocyanate,
3 portions of anti-aging agent,
3 parts of heat stabilizer,
3 parts of a crosslinking agent.
In this example, the crosslinking agent is a mixture of zinc peroxide and a rubber crosslinking agent VP-4L.
In the embodiment, the mass ratio of the crosslinking agent zinc peroxide to the rubber crosslinking agent VP-4L in the mixture of the crosslinking agent zinc peroxide and the rubber crosslinking agent VP-4L is 1: 2.8.
In this embodiment, the anti-aging agent is an anti-aging agent 4010.
In this example, the thermal stabilizer is stearic acid.
In this embodiment, the alumina is nano alumina.
In this embodiment, the zinc oxide is nano zinc oxide.
In this embodiment, the preparation method of the high-strength rubber composite material for the high-speed rail sealing member includes the following steps:
1) feeding natural rubber into an internal mixer, masticating for 13min at the temperature of 145 ℃, and discharging; storing the masticated natural rubber at room temperature for more than 48h for later use;
2) mixing the nitrile rubber, the natural rubber subjected to mastication in the step 1), the phenylene ether silicone rubber and the maleic anhydride grafted polyethylene in an open mill, and uniformly mixing to obtain mixed silicone rubber;
3) feeding the mixed silicon rubber into an internal mixer, adding white carbon black, aluminum oxide, zinc oxide, an anti-aging agent and a heat stabilizer, and mixing for 13min at the temperature of 106 ℃; then continuously mixing for 10min at the temperature of 115 ℃; then, cooling to 109 ℃, adding toluene diisocyanate and a cross-linking agent, and continuously mixing for 9 min; then discharging rubber, turning over by an open mill, then discharging and cooling;
4) carrying out calendering molding on the cooled rubber material in the step 3) by a calender;
5) sending the semi-finished product subjected to calendaring molding into a drying oven at 78 ℃ for preheating;
6) and putting the preheated rubber material into the mold cavity, uniformly and radially arranging according to the rolling direction of the rubber material, and feeding the rubber material into a flat vulcanizing machine for vulcanization to obtain the anti-aging silicone rubber sealing material.
The high strength rubber composite material for high speed railway sealing member obtained in examples 2 to 4 of the present invention and the general rubber sealing material were subjected to the following performance tests (test with reference to standard HG/T2579-94), and the test results are shown in table 1:
TABLE 1
From the analysis of the above table, the high-strength rubber composite material for the high-speed rail sealing element has high tensile strength and excellent mechanical property; also has good elasticity and low compression set.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (9)
1. The high-strength rubber composite material for the high-speed rail sealing element is characterized by comprising the following raw materials in parts by weight:
55-68 parts of nitrile rubber, 20-26 parts of natural rubber, 9-12 parts of phenylene ether silicone rubber, 5-7 parts of maleic anhydride grafted polyethylene, 4-7 parts of white carbon black, 0.5-0.8 part of aluminum oxide, 1-1.4 parts of zinc oxide, 0.07-0.09 part of toluene diisocyanate, 2.5-4.5 parts of an anti-aging agent, 2-4 parts of a heat stabilizer and 2-4 parts of a cross-linking agent.
2. The high-strength rubber composite material for the high-speed rail sealing element according to claim 1, which comprises the following raw materials in parts by weight:
61 parts of nitrile rubber, 23 parts of natural rubber, 11 parts of phenylene ether silicone rubber, 6 parts of maleic anhydride grafted polyethylene, 5.5 parts of white carbon black, 0.65 part of aluminum oxide, 1.2 parts of zinc oxide, 0.08 part of toluene diisocyanate, 3 parts of anti-aging agent, 3 parts of heat stabilizer and 3 parts of crosslinking agent.
3. The high strength rubber composite material for the high iron seal according to claim 1, wherein the crosslinking agent is a mixture of zinc peroxide and rubber crosslinking agent VP-4L.
4. The high-strength rubber composite material for the high-speed rail sealing member as claimed in claim 3, wherein the mass ratio of the zinc peroxide to the rubber crosslinking agent VP-4L in the mixture of the zinc peroxide and the rubber crosslinking agent VP-4L is 1: 2.5-3.2.
5. The high-strength rubber composite material for a high-speed rail seal according to claim 1, wherein the age resistor is an age resistor 4010.
6. The high strength rubber composite material for a high speed rail seal according to claim 1, wherein the heat stabilizer is stearic acid.
7. The high strength rubber composite material for a high iron seal according to claim 1, wherein the alumina is nano alumina.
8. The high strength rubber composite material for a high iron seal according to claim 1, wherein the zinc oxide is nano zinc oxide.
9. A preparation method of the high-strength rubber composite material for the high-speed rail sealing element according to any one of claims 1 to 8, characterized by comprising the following steps:
1) feeding natural rubber into an internal mixer, masticating for 10-15 min at the temperature of 140-150 ℃, and discharging; storing the masticated natural rubber at room temperature for more than 48h for later use;
2) mixing the nitrile rubber, the natural rubber subjected to mastication in the step 1), the phenylene ether silicone rubber and the maleic anhydride grafted polyethylene in an open mill, and uniformly mixing to obtain mixed silicone rubber;
3) feeding the mixed silicon rubber into an internal mixer, adding white carbon black, aluminum oxide, zinc oxide, an anti-aging agent and a heat stabilizer, and mixing for 10-15 min at the temperature of 103-108 ℃; then continuously mixing for 8-12 min at the temperature of 113-118 ℃; then, cooling to 108-110 ℃, adding toluene diisocyanate and a cross-linking agent, and continuously mixing for 8-10 min; then discharging rubber, turning over by an open mill, then discharging and cooling;
4) carrying out calendering molding on the cooled rubber material in the step 3) by a calender;
5) feeding the semi-finished product subjected to calendaring molding into a 75-80 ℃ oven for preheating;
6) and putting the preheated rubber material into the mold cavity, uniformly and radially arranging according to the rolling direction of the rubber material, and feeding the rubber material into a flat vulcanizing machine for vulcanization to obtain the anti-aging silicone rubber sealing material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622136A (en) * | 2020-12-02 | 2021-04-09 | 浙江翔宇密封件有限公司 | Production process and vulcanization equipment of sealing ring for high-speed rail |
| CN112724478A (en) * | 2020-12-02 | 2021-04-30 | 浙江翔宇密封件有限公司 | High-strength rubber composite material for high-speed rail sealing element and preparation method thereof |
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| US20140054512A1 (en) * | 2011-03-04 | 2014-02-27 | Xiaohong Zhang | Conductive full vulcanized thermoplastic elastomer and its preparation method |
| CN105564807A (en) * | 2015-12-25 | 2016-05-11 | 上海钰芊容器有限公司 | Sealing method for container |
| CN106751866A (en) * | 2016-12-30 | 2017-05-31 | 安徽京鸿密封件技术有限公司 | A kind of ultralow temperature bonded block sealing member material and preparation method thereof |
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| US20140054512A1 (en) * | 2011-03-04 | 2014-02-27 | Xiaohong Zhang | Conductive full vulcanized thermoplastic elastomer and its preparation method |
| CN105564807A (en) * | 2015-12-25 | 2016-05-11 | 上海钰芊容器有限公司 | Sealing method for container |
| CN106751866A (en) * | 2016-12-30 | 2017-05-31 | 安徽京鸿密封件技术有限公司 | A kind of ultralow temperature bonded block sealing member material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112622136A (en) * | 2020-12-02 | 2021-04-09 | 浙江翔宇密封件有限公司 | Production process and vulcanization equipment of sealing ring for high-speed rail |
| CN112724478A (en) * | 2020-12-02 | 2021-04-30 | 浙江翔宇密封件有限公司 | High-strength rubber composite material for high-speed rail sealing element and preparation method thereof |
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Application publication date: 20200717 |