CN115058069A - Rubber diaphragm sizing material composition for automobile brake chamber and preparation method thereof - Google Patents
Rubber diaphragm sizing material composition for automobile brake chamber and preparation method thereof Download PDFInfo
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Abstract
The invention provides a rubber diaphragm sizing material composition for an automobile brake chamber, which is mainly prepared by taking natural rubber, butadiene rubber, styrene-butadiene rubber and synthetic eucommia rubber as main materials and adding auxiliary agents of nano zinc oxide, stearic acid, a chemical anti-aging agent, a reinforcing agent, a plasticizer, a vulcanizing agent, an adhesive, an accelerant, a dispersing agent, coumarone resin, microcrystalline wax and white carbon black. The invention also provides a preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber, which is characterized in that the raw materials are mixed according to the proportion and the steps, the main process is completed in an internal mixer, the manufacturing steps of the rubber diaphragm sizing material composition are simplified, the number and the types of equipment are reduced, the manufacturing cost is reduced, and the production efficiency is improved.
Description
The application is a divisional application with the application date of 2020, 21.01. 202010070122.3 and the name of invention being 'a rubber diaphragm rubber material composition for automobile brake chambers and a preparation method thereof'.
Technical Field
The invention belongs to the technical field of preparation of diaphragm materials, and particularly relates to a rubber diaphragm rubber material composition for an automobile brake chamber and a preparation method thereof.
Background
The rubber diaphragm of the automobile brake chamber is a rubber-sandwiched fabric diaphragm which is used in the automobile brake chamber and plays a role in transferring pressure, and the rubber diaphragm has the main function of converting the pressure of compressed air into mechanical thrust, so that the automobile brake chamber plays a role in braking the automobile. The brake air chamber is a core component of the brake air chamber and also an important security component on an automobile, and the service life of the brake air chamber is directly influenced by the performance of the brake air chamber.
Along with the improvement of domestic and foreign integral infrastructures and the high-speed development of the automobile industry, the road conditions faced by automobile driving are more and more diversified, the braking frequency of the automobile is higher and higher, and higher requirements are provided for a braking system, particularly for the fatigue resistance and the flexibility resistance of a rubber diaphragm of an automobile brake chamber.
In order to meet the market demand, the applicant continuously focuses on the research of the formula and the preparation method of the rubber diaphragm rubber material for the automobile brake chamber, wherein the formula is 200810302714.2 and has a patent name of high-fatigue-resistance automobile brake chamber rubber diaphragm rubber material, and discloses the formula of the rubber diaphragm rubber material for the high-fatigue-resistance automobile brake chamber, which is mainly prepared from raw materials such as natural rubber, styrene butadiene rubber and polybutylene terephthalate, and has the performances of high stress at definite elongation, high tensile strength, compression and fatigue resistance, high dynamic deflection deformation resistance, high abrasion resistance and the like. In order to further improve the performance of the existing product and simplify the production and manufacturing process of the product, the applicant fully researches raw materials and a preparation method of the rubber diaphragm sizing material.
Disclosure of Invention
One of the objects of the present invention is: the rubber diaphragm rubber material composition for the automobile brake chamber is prepared from natural rubber, butadiene rubber, styrene butadiene rubber and synthetic eucommia rubber, and has superior fatigue resistance, aging resistance and other performances due to the addition of the synthetic eucommia rubber, so that the fatigue life of the rubber diaphragm for the brake chamber is prolonged, the rubber diaphragm composition is suitable for current automobile use conditions, and the safety of the automobile in the driving process is further guaranteed.
The second purpose of the invention is: the preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber comprises the steps of mixing the raw materials according to a certain proportion, wherein most of the working procedures are finished in an internal mixer, so that the preparation steps of the rubber diaphragm sizing material composition are reduced, the number and the types of equipment are reduced, the preparation cost of the rubber diaphragm sizing material composition is reduced, and the production efficiency is improved.
In order to realize the first purpose of the invention, the invention adopts the following technical scheme:
the invention provides a rubber material composition for a rubber diaphragm of an automobile brake chamber, which is prepared from the following raw materials in parts by weight:
30-70 parts of natural rubber, 10-35 parts of butadiene rubber, 10-35 parts of styrene butadiene rubber, 5-20 parts of synthetic eucommia rubber, 3-10 parts of nano zinc oxide, 0.5-2 parts of stearic acid, 2-8 parts of chemical anti-aging agent, 30-90 parts of reinforcing agent, 1-10 parts of plasticizer, 1-2 parts of vulcanizing agent, 3-10 parts of adhesive, 1-3 parts of accelerator, 1-6 parts of dispersing agent, 1-5 parts of coumarone resin, 1-3 parts of microcrystalline wax and 6-15 parts of white carbon black;
the plasticizer is paraffin oil, the adhesive is an adhesive RC, and the dispersant is a dispersant RPD-100;
the preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber comprises the following steps:
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying for 45-65 seconds in an internal mixing chamber of the internal mixer;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to a process, wherein the mixing time is 280 +/-30-350 +/-30 seconds;
3) when the temperature of the rubber material in the internal mixing chamber reaches 80-95 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber is discharged at 120-140 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 65-85 ℃, mixing for 220 +/-30-260 +/-30 seconds, pressing for 25-35 seconds, lifting a top plug, cleaning the vulcanizing agent accumulated on the top plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber materials when the temperature of the rubber materials in the internal mixer reaches 95-115 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber.
The rubber diaphragm sizing material composition for the automobile brake chamber adopts a blending system which takes natural rubber, butadiene rubber, styrene-butadiene rubber and synthetic eucommia rubber (trans-polyisoprene rubber) as main raw materials, the eucommia rubber is a novel rubber species unique to China and is in a crystalline state at normal temperature, can be converted into an elastomer after processes of crosslinking, chlorination, epoxidation, hydrogenation and the like, is a material between plastic and rubber, has the characteristics of low heat generation, no damping, high resilience in bending, excellent in bending fatigue property and the like, and the eucommia rubber simultaneously shows the characteristics of resin, is small in extrusion shrinkage and smooth in surface, is beneficial to design and control of semi-finished product size, and is applied to preparation of the rubber diaphragm sizing material for the first time by an applicant.
Typical but not limiting parts by weight of the natural rubber in the present invention are 30 parts, 40 parts, 50 parts, 60 parts and 70 parts, typical but not limiting parts by weight of the butadiene rubber are 10 parts, 15 parts, 20 parts, 25 parts and 35 parts, typical but not limiting parts by weight of the styrene-butadiene rubber are 10 parts, 15 parts, 20 parts, 25 parts and 35 parts, and typical but not limiting parts by weight of the eucommia rubber are 5 parts, 8 parts, 10 parts, 15 parts and 20 parts.
The nano zinc oxide is an inorganic active agent, can accelerate the vulcanization speed when being added into a rubber material, and can also improve the crosslinking degree, so that the rubber has good wear resistance, tearing resistance and elasticity. Typical but non-limiting parts by weight of the nano zinc oxide in the present invention are 3 parts, 4 parts, 5 parts, 8 parts and 10 parts.
Stearic acid reacts with nano zinc oxide in the synthesis and processing processes of rubber to generate zinc stearate which plays the role of an active agent, and also can play the role of a softener, so that the toughness of the rubber is stronger, the roller sticking and scorching of natural rubber can be prevented, and the processing performance is improved. Typical but non-limiting parts by weight of stearic acid in the present invention are 0.5 parts, 0.8 parts, 1 part, 1.5 parts and 2 parts.
When an automobile is braked, the brake air chamber can generate high temperature of 50-80 ℃ to accelerate the aging of the rubber diaphragm, and the aging of the rubber diaphragm can be delayed by adding the chemical anti-aging agent. Typical but non-limiting parts by weight of the antioxidant in the present invention are 2 parts, 3 parts, 5.5 parts, 6 parts and 8 parts.
The carbon black is used as a reinforcing agent, and the function of the carbon black is mainly to improve the physical properties of rubber diaphragm rubber, such as hardness, tensile strength at break, tearing strength and the like. Typical but non-limiting parts by weight of the reinforcing agent in the present invention are 30 parts, 45 parts, 65 parts, 80 parts and 90 parts.
The plasticizer is added in the rubber processing, so that the acting force between rubber molecules can be reduced, the glass transition temperature of the rubber is reduced, the plasticity and the fluidity of the rubber are improved, the forming operations such as calendering and extrusion are facilitated, the hardness and the stress at definite elongation of vulcanized rubber can be improved, the vulcanized rubber is endowed with higher elasticity and lower heat generation, the cold resistance of the vulcanized rubber is improved, and the like. Typical but non-limiting parts by weight of the plasticizer in the present invention are 1 part, 3 parts, 6 parts, 8 parts and 10 parts.
The vulcanizing agent can accelerate the vulcanization of rubber, improve the hardness, strength, aging resistance and heat resistance of the rubber and reduce the combustibility of the rubber. Typical but non-limiting parts by weight of the vulcanizing agent in the present invention are 1 part, 1.2 parts, 1.6 parts, 1.8 parts and 2 parts.
The adhesive can increase the elasticity and the viscosity of rubber, increase the bonding fastening and the fastness between the rubber material and the fabric, ensure that the relative deformation and the displacement between the rubber material and the fabric are smaller in the use process of the rubber diaphragm, and prolong the service life of the rubber diaphragm. Typical but non-limiting parts by weight of the binder in the present invention are 3 parts, 4 parts, 6 parts, 8 parts and 10 parts.
Preferably, the rubber diaphragm sizing material composition for the automobile brake chamber is prepared from the following raw materials in parts by weight:
40-60 parts of natural rubber, 15-25 parts of butadiene rubber, 15-25 parts of styrene butadiene rubber, 8-15 parts of synthetic eucommia rubber, 4-8 parts of nano zinc oxide, 0.8-1.5 parts of stearic acid, 3-6 parts of chemical anti-aging agent, 45-80 parts of reinforcing agent, 3-8 parts of plasticizer, 1.2-1.8 parts of vulcanizing agent, 4-8 parts of adhesive, 1-2 parts of accelerator, 2-5 parts of dispersing agent, 1.5-3 parts of coumarone resin, 1.5-2.5 parts of microcrystalline wax and 8-12 parts of white carbon black.
Preferably, the rubber diaphragm sizing material composition for the automobile brake chamber is prepared from the following raw materials in parts by weight:
50 parts of natural rubber, 20 parts of butadiene rubber, 20 parts of styrene-butadiene rubber, 10 parts of synthetic eucommia rubber, 5 parts of nano-zinc oxide, 1 part of stearic acid, 5.5 parts of chemical anti-aging agent, 65 parts of reinforcing agent, 6 parts of plasticizer, 1.6 parts of vulcanizing agent, 6 parts of adhesive, 1.7 parts of accelerator, 3 parts of dispersant, 2 parts of coumarone resin, 2 parts of microcrystalline wax and 10 parts of white carbon black.
Preferably, when the raw materials used in the rubber diaphragm sizing material composition for the automobile brake chamber are in the following mixture ratio, the obtained rubber diaphragm has better performance: the chemical anti-aging agent consists of 1 part of anti-aging agent 4010NA, 1.5 parts of anti-aging agent RD, 1 part of anti-aging agent BLE-W and 2 parts of anti-fatigue agent PL-6002.
Preferably, the reinforcing agent in the rubber diaphragm rubber compound composition for the automobile brake chamber consists of N33045 parts of high-abrasion-resistance carbon black and N55020 parts of fast extrusion carbon black.
Preferably, the accelerator in the rubber diaphragm sizing material composition for the automobile brake chamber consists of 1 part of accelerator CZ, 0.5 part of accelerator DTDM and 0.2 part of accelerator TMTD.
Preferably, the vulcanizing agent in the rubber diaphragm sizing composition for the automobile brake chamber is insoluble sulfur.
Preferably, the plasticizer in the rubber diaphragm compound composition for the automobile brake air chamber is paraffin oil.
Preferably, the adhesive in the automotive brake chamber rubber membrane size composition is adhesive RC.
Preferably, the dispersant in the rubber diaphragm size composition of the automobile brake chamber is a dispersant RPD-100.
Preferably, the microcrystalline wax in the rubber diaphragm size composition for the automobile brake chamber is 9332F.
In order to realize the second purpose of the invention, the invention adopts the following technical scheme:
the invention also provides a preparation method of the rubber compound composition for the rubber diaphragm of the automobile brake chamber, which comprises the following steps:
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano-zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 45-65 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to a process, wherein the mixing time is 280 +/-30-350 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 80-95 ℃, adding a plasticizer into the internal mixer in the step 2), continuously mixing until the rubber is discharged at 120-140 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into the internal mixer in the step 3), adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of the rubber material is raised to 65-85 ℃, mixing for 220 +/-30-260 +/-30 seconds, pressing for 25-35 seconds, lifting a top plug, cleaning the vulcanizing agent accumulated on the top plug, continuously mixing the rubber material after cleaning, and discharging when the temperature of the rubber material in the internal mixer reaches 95-115 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber.
Preferably, the plastication time in the step 1) is 50-60 seconds.
Preferably, the mixing time in step 2) is 300 ± 30 seconds.
Preferably, the temperature of the internal mixer is 88-92 ℃ and the temperature of rubber discharge is 130 ℃ when the plasticizer is added in the step 3).
Preferably, in the step 4), when the temperature of the rubber material rises to 75 ℃, adding a vulcanizing agent, an adhesive, an accelerator and white carbon black into an internal mixer, mixing for 240 +/-30 seconds, pressing for 30 seconds, lifting a ram, cleaning the vulcanizing agent accumulated on the ram, after cleaning, continuously mixing the rubber material, and when the temperature of the rubber material in the internal mixer reaches 100 ℃, discharging the rubber material.
The eucommia ulmoides rubber is a novel rubber species peculiar to China, is in a crystalline state at normal temperature, can be converted into an elastomer after processes such as crosslinking, chlorination, epoxidation, hydrogenation and the like, is a material between plastic and rubber, and has the characteristics of low heat generation, no damping, high resilience in bending, excellent bending fatigue property and the like; the eucommia rubber also shows the characteristics of resin, has small extrusion shrinkage and smooth surface, and is beneficial to the design and control of the size of a semi-finished product.
The rubber diaphragm sizing material composition for the automobile brake chamber, which is prepared by taking natural rubber, butadiene rubber, styrene-butadiene rubber and synthetic eucommia rubber (trans-polyisoprene rubber) as main raw materials, has more excellent performances of fatigue resistance, oxidation resistance, bending resistance and the like, improves the fatigue life of the rubber diaphragm for the brake chamber, is suitable for the current automobile use conditions, and ensures the safety of the automobile in the driving process. According to actual tests, the service life reaches 250 ten thousand times, exceeds 100 ten thousand times specified by national standards and 200 ten thousand times specified by U.S. standards.
The invention also provides a preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber, and the preparation method is characterized in that the raw materials are plasticated and mixed according to a certain proportion and steps, wherein most of the procedures are finished in an internal mixer, so that the manufacturing steps of the rubber diaphragm are reduced, the types and the number of production equipment are reduced, the production and manufacturing cost is reduced, and the production efficiency is improved.
The invention provides four main raw materials of the rubber diaphragm sizing material composition of an automobile brake chamber, the selection and matching of various auxiliary agents and the determination of the parts of vulcanizing agents: after a plurality of tests are carried out, the formula of the rubber compound composition of the automobile brake chamber rubber diaphragm determined after optimization is shown in the following table 1:
table 1: rubber diaphragm sizing material composition formula for automobile brake chamber
The performance parameters of the rubber diaphragm compound composition for the automobile brake chamber are shown in Table 2:
table 2: performance detection table of rubber diaphragm sizing material composition of automobile brake chamber
Note: table 2 shows the performance test results of the rubber material composition for the rubber diaphragm of the automobile brake chamber in Table 1, which are tested by the national standard method.
Compared with the prior art, the rubber material composition for the rubber diaphragm of the automobile brake chamber, which is prepared by taking natural rubber, butadiene rubber, styrene-butadiene rubber and synthetic eucommia rubber (trans-polyisoprene rubber) as main raw materials according to the formula, has more excellent performances of fatigue resistance, oxidation resistance, deflection resistance and the like, improves the fatigue life of the rubber diaphragm of the brake chamber, adapts to the current automobile use conditions, and guarantees the safety of the automobile in the driving process, and according to actual tests, the service life of the rubber material composition for the rubber diaphragm of the automobile brake chamber reaches 250 ten thousand times, which exceeds 100 ten thousand times specified by national standards and 200 ten thousand times of U.S. standards.
Detailed Description
In order to further illustrate the present invention, the following examples are given as illustrative embodiments of the present invention and should not be construed as limiting the scope of the present invention.
Example 1:
the raw materials are weighed according to the following formula: 30 parts of natural rubber, 10 parts of butadiene rubber, 10 parts of styrene-butadiene rubber, 5 parts of synthetic eucommia rubber, 3 parts of nano zinc oxide, 0.5 part of stearic acid, 2 parts of chemical anti-aging agent, 30 parts of reinforcing agent, 1 part of plasticizer, 1 part of vulcanizing agent, 3 parts of adhesive, 1.7 parts of accelerator, 1 part of dispersant, 1 part of coumarone resin, 1 part of microcrystalline wax and 6 parts of white carbon black;
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 50-60 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to the process, wherein the mixing time is 300 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 88-92 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber material is discharged at 130 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 75 ℃, mixing for 240 +/-30 seconds, pressing the rubber plug for 30 seconds, lifting the rubber plug, cleaning the vulcanizing agent accumulated on the rubber plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber when the temperature of the rubber materials in the internal mixer reaches 100 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber in the embodiment 1.
The rubber diaphragm rubber composition for the automobile brake chamber prepared in example 1 was subjected to performance tests according to the relevant national standards, and the test results are shown in table 4: comparative tables for the performance tests of examples 1 to 5.
Example 2:
the raw materials are weighed according to the following formula: 40 parts of natural rubber, 15 parts of butadiene rubber, 15 parts of styrene-butadiene rubber, 8 parts of synthetic eucommia rubber, 4 parts of nano zinc oxide, 0.8 part of stearic acid, 3 parts of chemical anti-aging agent, 45 parts of reinforcing agent, 2 parts of plasticizer, 1.2 parts of vulcanizing agent, 4 parts of adhesive, 1.7 parts of accelerator, 2 parts of dispersant, 1.5 parts of coumarone resin, 1.5 parts of microcrystalline wax and 8 parts of white carbon black;
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 50-60 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to the process, wherein the mixing time is 300 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 88-92 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber material is discharged at 130 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 75 ℃, mixing for 240 +/-30 seconds, pressing the rubber plug for 30 seconds, lifting the rubber plug, cleaning the vulcanizing agent accumulated on the rubber plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber when the temperature of the rubber materials in the internal mixer reaches 100 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm material composition of the automobile brake chamber in the embodiment 2.
The rubber diaphragm composition for the automobile brake chamber prepared in example 2 was subjected to performance tests according to the relevant national standards, and the test results are shown in table 4: comparative tables for the performance tests of examples 1 to 5.
Example 3:
the raw materials are weighed according to the following formula: 50 parts of natural rubber, 20 parts of butadiene rubber, 20 parts of styrene-butadiene rubber, 10 parts of synthetic eucommia rubber, 5 parts of nano zinc oxide, 1 part of stearic acid, 5.5 parts of chemical anti-aging agent, 65 parts of reinforcing agent, 6 parts of plasticizer, 1.6 parts of vulcanizing agent, 6 parts of adhesive, 1.7 parts of accelerator, 3 parts of dispersant, 2 parts of coumarone resin, 2 parts of microcrystalline wax and 10 parts of white carbon black;
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 50-60 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to a process, wherein the mixing time is 300 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 88-92 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber material is discharged at 130 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 75 ℃, mixing for 240 +/-30 seconds, pressing the rubber plug for 30 seconds, lifting the rubber plug, cleaning the vulcanizing agent accumulated on the rubber plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber when the temperature of the rubber materials in the internal mixer reaches 100 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber in the embodiment 3.
The rubber diaphragm composition for the automobile brake chamber prepared in example 3 was subjected to performance tests according to the relevant national standards, and the test results are shown in table 4: comparative tables for the performance tests of examples 1 to 5.
Example 4:
the raw materials are weighed according to the following formula: 60 parts of natural rubber, 25 parts of butadiene rubber, 25 parts of styrene-butadiene rubber, 15 parts of synthetic eucommia rubber, 8 parts of nano zinc oxide, 1.5 parts of stearic acid, 6 parts of chemical anti-aging agent, 80 parts of reinforcing agent, 8 parts of plasticizer, 1.8 parts of vulcanizing agent, 8 parts of adhesive, 1.7 parts of accelerator, 5 parts of dispersing agent, 3 parts of coumarone resin, 2.5 parts of microcrystalline wax and 12 parts of white carbon black;
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 50-60 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to the process, wherein the mixing time is 300 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 88-92 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber material is discharged at 130 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 75 ℃, mixing for 240 +/-30 seconds, pressing the rubber plug for 30 seconds, lifting the rubber plug, cleaning the vulcanizing agent accumulated on the rubber plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber when the temperature of the rubber materials in the internal mixer reaches 100 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber in the embodiment 4.
The rubber diaphragm rubber composition for the automobile brake chamber prepared in example 4 was subjected to performance tests according to the relevant national standards, and the test results are shown in table 4: comparative tables for the performance tests of examples 1 to 5.
Example 5:
the raw materials are weighed according to the following formula: 70 parts of natural rubber, 35 parts of butadiene rubber, 35 parts of styrene-butadiene rubber, 20 parts of synthetic eucommia rubber, 10 parts of nano zinc oxide, 2 parts of stearic acid, 8 parts of chemical anti-aging agent, 90 parts of reinforcing agent, 10 parts of plasticizer, 2 parts of vulcanizing agent, 10 parts of adhesive, 1.7 parts of accelerator, 6 parts of dispersant, 5 parts of coumarone resin, 3 parts of microcrystalline wax and 15 parts of white carbon black;
1) putting natural rubber, butadiene rubber, styrene butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 50-60 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to the process, wherein the mixing time is 300 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 88-92 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber material is discharged at 130 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of the rubber material is raised to 75 ℃, mixing for 240 +/-30 seconds, pressing for 30 seconds, lifting a top plug, cleaning the vulcanizing agent accumulated on the top plug, continuously mixing the rubber material after cleaning is finished, and discharging the rubber when the temperature of the rubber material in the internal mixer reaches 100 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber in the embodiment 5.
The rubber diaphragm composition for the automobile brake chamber prepared in example 5 was subjected to performance tests according to the relevant national standards, and the test results are shown in table 4: comparative tables for the performance tests of examples 1 to 5.
The component ratios of examples 1 to 5 are shown in Table 3 below:
table 3: formulation proportion table of examples 1 to 5
The performance test results of examples 1-5 are shown in Table 4 below:
table 4: performance test reference Table for examples 1 to 5
Comparing the performance test data of each of the examples in Table 4 above, where the combination of the properties of example 3 is the best, it is ultimately preferred to identify formulation 3 as the automotive brake chamber rubber diaphragm compound formulation of the present invention.
The rubber diaphragm sizing material composition for the automobile brake chamber provided by the invention adopts a blending system of natural rubber, styrene-butadiene rubber, butadiene rubber and eucommia rubber as a main body, and an auxiliary agent is added, so that the physical and mechanical properties of the obtained rubber diaphragm sizing material composition for the automobile brake chamber all reach the new standard of American Society of Automotive Engineers (SAE), the service life of a rack of the rubber diaphragm sizing material composition for the automobile brake chamber reaches more than 250 ten thousand times, the rubber diaphragm sizing material composition for the automobile brake chamber has high stress at definite elongation, high tensile strength and elongation, compression and fatigue resistance, high dynamic deflection resistance and high wear resistance, the material property change is very small when the rubber diaphragm sizing material composition is used at the temperature of-55-100 ℃, the service life is basically equivalent to that of an air brake assembly, and resources are saved.
The preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber, provided by the invention, is characterized in that the raw materials are mixed by a high-temperature internal mixer according to a certain proportion and steps, the preparation method is simple, most of the procedures are finished in the internal mixer, the manufacturing steps of the rubber diaphragm are reduced, the variety and the number of production equipment are reduced, the production and manufacturing cost is reduced, and the production efficiency is improved.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and all of the embodiments belong to the protection scope of the present invention.
Claims (10)
1. The rubber diaphragm sizing material composition for the automobile brake chamber is characterized by being prepared from the following raw materials in parts by weight:
30-70 parts of natural rubber, 10-35 parts of butadiene rubber, 10-35 parts of styrene butadiene rubber, 5-20 parts of synthetic eucommia rubber, 3-10 parts of nano zinc oxide, 0.5-2 parts of stearic acid, 2-8 parts of chemical anti-aging agent, 30-90 parts of reinforcing agent, 1-10 parts of plasticizer, 1-2 parts of vulcanizing agent, 3-10 parts of adhesive, 1-3 parts of accelerator, 1-6 parts of dispersing agent, 1-5 parts of coumarone resin, 1-3 parts of microcrystalline wax and 6-15 parts of white carbon black;
the plasticizer is paraffin oil, the adhesive is an adhesive RC, and the dispersant is a dispersant RPD-100;
the preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber comprises the following steps:
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying for 45-65 seconds in an internal mixing chamber of the internal mixer;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to a process, wherein the mixing time is 280 +/-30-350 +/-30 seconds;
3) when the temperature of the rubber material in the internal mixing chamber reaches 80-95 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber is discharged at 120-140 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 65-85 ℃, mixing for 220 +/-30-260 +/-30 seconds, pressing for 25-35 seconds, lifting a top plug, cleaning the vulcanizing agent accumulated on the top plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber materials when the temperature of the rubber materials in the internal mixer reaches 95-115 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber.
2. The rubber diaphragm composition for the automobile brake chamber, according to claim 1, is prepared from the following raw materials in parts by weight:
40-60 parts of natural rubber, 15-25 parts of butadiene rubber, 15-25 parts of styrene butadiene rubber, 8-15 parts of synthetic eucommia rubber, 4-8 parts of nano zinc oxide, 0.8-1.5 parts of stearic acid, 3-6 parts of chemical anti-aging agent, 45-80 parts of reinforcing agent, 3-8 parts of plasticizer, 1.2-1.8 parts of vulcanizing agent, 4-8 parts of adhesive, 1-2 parts of accelerator, 2-5 parts of dispersing agent, 1.5-3 parts of coumarone resin, 1.5-2.5 parts of microcrystalline wax and 8-12 parts of white carbon black.
3. The rubber diaphragm composition for the automobile brake chamber, according to claim 1, is prepared from the following raw materials in parts by weight:
50 parts of natural rubber, 20 parts of butadiene rubber, 20 parts of styrene-butadiene rubber, 10 parts of synthetic eucommia rubber, 5 parts of nano-zinc oxide, 1 part of stearic acid, 5.5 parts of chemical anti-aging agent, 65 parts of reinforcing agent, 6 parts of plasticizer, 1.6 parts of vulcanizing agent, 6 parts of adhesive, 1.7 parts of accelerator, 3 parts of dispersant, 2 parts of coumarone resin, 2 parts of microcrystalline wax and 10 parts of white carbon black.
4. The rubber diaphragm rubber composition for the brake air chamber of the automobile according to any one of claims 1 to 3, wherein the chemical anti-aging agent comprises, by weight, 4010NA1 parts of anti-aging agent, 1.5 parts of anti-aging agent RD, 1 part of anti-aging agent BLE-W and PL-6002 parts of anti-fatigue agent.
5. The rubber diaphragm rubber composition for automobile brake chambers, as recited in any one of claims 1 to 3, wherein the reinforcing agent comprises N33045 parts by weight of high abrasion carbon black and N55020 parts by weight of fast extrusion carbon black.
6. The rubber diaphragm composition for automobile brake chambers according to any one of claims 1 to 3, wherein the accelerator comprises 1 part by weight of accelerator CZ, 0.5 part by weight of accelerator DTDM and 0.2 part by weight of accelerator TMTD.
7. The automotive brake chamber rubber diaphragm compound composition according to any one of claims 1 to 3, wherein the vulcanizing agent is insoluble sulfur.
8. The automobile brake chamber rubber diaphragm composition according to any one of claims 1 to 3, wherein the microcrystalline wax is microcrystalline wax 9332F.
9. The preparation method of the rubber diaphragm sizing material composition for the automobile brake chamber, which is disclosed by any one of claims 1 to 3, comprises the following steps:
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying for 45-65 seconds in an internal mixing chamber of the internal mixer;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to a process, wherein the mixing time is 280 +/-30-350 +/-30 seconds;
3) when the temperature of the rubber material in the internal mixing chamber reaches 80-95 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber is discharged at 120-140 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 65-85 ℃, mixing for 220 +/-30-260 +/-30 seconds, pressing for 25-35 seconds, lifting a top plug, cleaning the vulcanizing agent accumulated on the top plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber materials when the temperature of the rubber materials in the internal mixer reaches 95-115 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber.
10. The method of claim 9, comprising the steps of:
1) putting natural rubber, butadiene rubber, styrene-butadiene rubber, synthetic eucommia rubber, a dispersing agent, nano zinc oxide, stearic acid, microcrystalline wax, coumarone resin and a chemical anti-aging agent into an internal mixer at one time according to the formula amount, and plastifying in an internal mixing chamber of the internal mixer for 50-60 seconds;
2) adding a reinforcing agent into the internal mixer in the step 1), and mixing according to the process, wherein the mixing time is 300 +/-30 seconds;
3) when the temperature of the rubber material in an internal mixing chamber reaches 88-92 ℃, adding a plasticizer into the internal mixing machine in the step 2), continuously mixing until the rubber material is discharged at 130 ℃, and cooling the rubber material to room temperature;
4) putting the rubber sheet cooled to room temperature into an internal mixer, adding a vulcanizing agent, an adhesive, an accelerant and white carbon black into the internal mixer when the temperature of rubber materials rises to 75 ℃, mixing for 240 +/-30 seconds, pressing the rubber plug for 30 seconds, lifting the rubber plug, cleaning the vulcanizing agent accumulated on the rubber plug, continuously mixing the rubber materials after cleaning is finished, and discharging the rubber when the temperature of the rubber materials in the internal mixer reaches 100 ℃;
5) and (3) dropping the rubber material on an open mill, tabletting, cooling and loading into a storage device to obtain the rubber diaphragm rubber material composition of the automobile brake chamber.
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| CN101121803A (en) * | 2007-07-27 | 2008-02-13 | 青岛科大方泰材料工程有限公司 | Method for preparing trans-isoprene complexes and its products and use |
| CN109608707A (en) * | 2019-01-07 | 2019-04-12 | 宁波乔士橡塑有限公司 | A kind of automobile brake chamber diaphragm material formula and preparation method thereof |
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| CN100595227C (en) * | 2008-07-11 | 2010-03-24 | 贵州精忠橡塑实业有限公司 | Formula of highly anti-fatigue automobile brake chamber rubber diaphragm material |
| CN102617899A (en) * | 2012-03-29 | 2012-08-01 | 程旻 | Automobile braking air chamber rubber diaphragm sizing material formula taking butadiene-styrene rubber as main sizing material |
| JP2018028103A (en) * | 2017-11-08 | 2018-02-22 | 株式会社ブリヂストン | Rubber composition and hose |
| CN107880329A (en) * | 2017-12-12 | 2018-04-06 | 舟山市奥盛汽车传动带制造有限公司 | A kind of automobile rubber diaphragm material and preparation method thereof |
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| CN101121803A (en) * | 2007-07-27 | 2008-02-13 | 青岛科大方泰材料工程有限公司 | Method for preparing trans-isoprene complexes and its products and use |
| CN109608707A (en) * | 2019-01-07 | 2019-04-12 | 宁波乔士橡塑有限公司 | A kind of automobile brake chamber diaphragm material formula and preparation method thereof |
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