CN111363213A - Preparation method of high-strength brake caliper sealing element - Google Patents
Preparation method of high-strength brake caliper sealing element Download PDFInfo
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- CN111363213A CN111363213A CN202010344155.2A CN202010344155A CN111363213A CN 111363213 A CN111363213 A CN 111363213A CN 202010344155 A CN202010344155 A CN 202010344155A CN 111363213 A CN111363213 A CN 111363213A
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- strength brake
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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
- 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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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a preparation method of a high-strength brake caliper sealing element in the technical field of sealing elements, which comprises the following steps: (1) stirring and dispersing talcum powder, nano silicon carbide and deionized water, and stirring for 20-25min to obtain a blending solution A; (2) dropwise adding a sodium silicate solution into the blending solution, and stirring at a high speed for 2-5min to obtain a blending solution B; (3) adding hydrochloric acid into the blending liquid B, reacting for 20-25min to generate colloidal precipitate, and drying the colloidal precipitate at 150-200 ℃ for 6-7h to obtain a prefabricated material; (4) mixing nitrile rubber, a prefabricated material and an anti-aging agent, and standing to obtain a mixed rubber; (5) adding pine tar and sulfur into the rubber compound, and vulcanizing and forming to obtain a high-strength brake caliper sealing member; according to the invention, the talcum powder, the nano silicon carbide, the sodium silicate solution, the hydrochloric acid and the like are added, and the talcum powder with the nano silicon carbide adhered on the outer surface is used as the filler, so that the strength of the sealing element is effectively improved.
Description
Technical Field
The invention relates to the technical field of sealing elements, in particular to a preparation method of a high-strength brake caliper sealing element.
Background
A caliper disc brake is one type of disc brake. Its rotating element is a metal disc working with end faces, called a brake disc. The fixed elements are brake blocks consisting of friction blocks with small working area and metal back plates thereof, 2-4 brake blocks are arranged in each brake, and the brake blocks and actuating devices thereof are arranged in clamp-shaped brackets crossing two sides of a brake disc, which are collectively called brake calipers. The brake disc and the brake caliper together form a caliper disc brake. The seal is a material or a part that prevents fluid or solid particles from leaking from between adjacent bonding surfaces and prevents foreign substances such as dust and moisture from intruding into parts inside the machine equipment. The storage room temperature of the sealing element is preferably below 30 ℃, so that the sealing element is prevented from high-temperature aging. The caliper is an important component of the brake, and the quality of the seal affects the braking effect of the caliper disc brake.
The brake disc is fixed on the wheel hub, the brake caliper is fixed on the vehicle axle, and two brake wheel cylinder pistons are arranged in the brake caliper and respectively press brake blocks on two sides of the brake disc. When a driver steps on a brake pedal to brake an automobile, brake fluid from a brake master cylinder is pressed into a brake wheel cylinder, the hydraulic pressure of the brake wheel cylinder is increased, a piston of the two wheel cylinder moves towards a brake disc under the action of the hydraulic pressure to press a brake block against the brake disc, the brake block clamps the brake disc, and friction torque for preventing the wheel from rotating is generated to realize braking.
Therefore, a high-strength seal produced by the method for producing a high-strength caliper seal is proposed to solve the above problems.
Disclosure of Invention
The invention aims to provide a preparation method of a high-strength brake caliper sealing element, and the obtained sealing element has high strength so as to solve the problems in the background technology.
In order to achieve the above object, the present invention also provides a method for preparing a high strength brake caliper seal, comprising the steps of:
(1) stirring and dispersing talcum powder, nano silicon carbide and deionized water, and stirring for 20-25min to obtain a blending solution A;
(2) dropwise adding a sodium silicate solution into the blending solution, and stirring at a high speed for 2-5min to obtain a blending solution B;
(3) adding hydrochloric acid into the blending liquid B, reacting for 20-25min to generate colloidal precipitate, and drying the colloidal precipitate at 150-200 ℃ for 6-7h to obtain a prefabricated material;
(4) mixing nitrile rubber, a prefabricated material and an anti-aging agent, and standing to obtain a mixed rubber;
(5) and adding pine tar and sulfur into the rubber compound, and vulcanizing and forming to obtain the high-strength brake caliper sealing member.
Preferably, the weight ratio of the talcum powder, the nano silicon carbide and the deionized water in the step (1) is 30-40: 20-25: 200-300.
Preferably, the weight ratio of the sodium silicate solution to the hydrochloric acid is 15-20: 10-12.
Preferably, the weight ratio of the nitrile rubber, the preformed material and the anti-aging agent in the step (4) is 120-160: 25-30: 2-3.
Preferably, the weight ratio of the rubber compound, the pine tar and the sulfur in the step (5) is 200-: 2-3: 0.5-2.
Preferably, the drying temperature in the step (3) is 180 ℃, and the drying time is 6.5 h.
Preferably, the anti-aging agent is any one of N-phenyl- α -aniline, N-phenyl- β -naphthylamine and N-phenyl-N' -cyclohexyl p-phenylenediamine.
The invention has the beneficial effects that:
according to the invention, by adding talcum powder, nano silicon carbide, a sodium silicate solution, hydrochloric acid and the like, the sodium silicate solution, the talcum powder and the nano silicon carbide are fully and uniformly mixed, the nano silicon carbide is adsorbed on the surfaces of talcum powder particles through Van der Waals force, then the hydrochloric acid is added, and the hydrochloric acid reacts with the sodium silicate solution to generate white colloidal precipitate which is a polymer of orthosilicic acid, the orthosilicic acid is polyhydroxy micromolecule, the polysilicic acid forms a net structure in water and has good adhesiveness to silicate, carbide and the like, so that the nano silicon carbide is adhered with the talcum powder, the nano silicon carbide has the characteristics of good chemical corrosion resistance, high strength, high hardness, good wear resistance, small friction coefficient and high temperature resistance, the talcum powder with the nano silicon carbide adhered to the outer surface is used as a filler, and the strength of a sealing element is effectively improved;
the anti-aging agent is added, so that the damage to the performance of the sealing element caused by factors such as oxygen, heat, light, ozone, mechanical stress, heavy metal ions and the like can be prevented or inhibited, and the storage and service life of the sealing element can be prolonged;
according to the invention, by adding the pine tar, the dispersibility of the prefabricated material in the rubber compound can be improved under the coordination of the pine tar, the strength of the rubber compound is further improved, and the strength of the sealing element is favorably improved;
the average tensile strength of the sealing element in the embodiment of the invention is 18.6MPa and is more than 14 MPa; the average elongation at break is 511.8 percent and is more than 390 percent, and in conclusion, the sealing element obtained by the invention has higher strength and is beneficial to prolonging the service life of the sealing element.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
A method of making a high strength brake caliper seal comprising the steps of:
(1) stirring and dispersing 30kg of talcum powder, 20kg of nano silicon carbide and 200kg of deionized water, and stirring for 20min to obtain a blending solution A;
(2) dropwise adding 15kg of sodium silicate solution into the blending solution, and stirring at a high speed for 2min to obtain a blending solution B;
(3) adding 10kg of hydrochloric acid into the blending liquid B, reacting for 20min to generate colloidal precipitate, and drying the colloidal precipitate at 150 ℃ for 6h to obtain a prefabricated material;
(4) mixing 120kg of nitrile rubber, 25kg of prefabricated material and 2kg of N-phenyl- α -aniline, and standing to obtain mixed rubber;
(5) 2kg of pine tar and 0.5kg of sulfur are added into 200kg of rubber compound, and the mixture is vulcanized and molded to obtain the high-strength brake caliper sealing member.
Example two
A method of making a high strength brake caliper seal comprising the steps of:
(1) stirring and dispersing 35kg of talcum powder, 22kg of nano silicon carbide and 220kg of deionized water, and stirring for 25min to obtain a blending solution A;
(2) dropwise adding 17kg of sodium silicate solution into the blending solution, and stirring at a high speed for 2min to obtain a blending solution B;
(3) adding 11kg of hydrochloric acid into the blending liquid B, reacting for 22min to generate colloidal precipitate, and drying the colloidal precipitate at 180 ℃ for 6.5h to obtain a prefabricated material;
(4) mixing 130kg of nitrile rubber, 28kg of prefabricated material and 2.2kg of N-phenyl- α -aniline, and standing to obtain mixed rubber;
(5) 2.5kg of pine tar and 1kg of sulfur are added into 200kg of rubber compound, and the mixture is vulcanized and molded to obtain the high-strength brake caliper sealing member.
EXAMPLE III
A method of making a high strength brake caliper seal comprising the steps of:
(1) stirring and dispersing 38kg of talcum powder, 25kg of nano silicon carbide and 250kg of deionized water, and stirring for 23min to obtain a blending solution A;
(2) dropwise adding 17kg of sodium silicate solution into the blending solution, and stirring at a high speed for 3min to obtain a blending solution B;
(3) adding 12kg of hydrochloric acid into the blending liquid B, reacting for 23min to generate colloidal precipitate, and drying the colloidal precipitate at 190 ℃ for 7h to obtain a prefabricated material;
(4) mixing 140kg of nitrile rubber, 30kg of prefabricated material and 2.5kg of N-phenyl- β -naphthylamine, and standing to obtain mixed rubber;
(5) 2.5kg of pine tar and 1.5kg of sulfur were added to 220kg of the rubber compound, and vulcanization molding was carried out to obtain a high-strength brake caliper seal.
Example four
A method of making a high strength brake caliper seal comprising the steps of:
(1) stirring and dispersing 40kg of talcum powder, 22kg of nano silicon carbide and 280kg of deionized water, and stirring for 25min to obtain a blending solution A;
(2) dropwise adding 18kg of sodium silicate solution into the blending solution, and stirring at a high speed for 3min to obtain a blending solution B;
(3) adding 12kg of hydrochloric acid into the blending liquid B, reacting for 25min to generate colloidal precipitate, and drying the colloidal precipitate at 190 ℃ for 7h to obtain a prefabricated material;
(4) mixing 150kg of nitrile rubber, 30kg of prefabricated material and 2.5kg of N-phenyl- β -naphthylamine, and standing to obtain mixed rubber;
(5) 3kg of pine tar and 1.5kg of sulfur were added to 220kg of the rubber compound, and vulcanization molding was carried out to obtain a high-strength brake caliper seal.
EXAMPLE five
A method of making a high strength brake caliper seal comprising the steps of:
(1) stirring and dispersing 40kg of talcum powder, 25kg of nano silicon carbide and 290kg of deionized water, and stirring for 25min to obtain a blending solution A;
(2) dropwise adding 20kg of sodium silicate solution into the blending solution, and stirring at a high speed for 3min to obtain a blending solution B;
(3) adding 12kg of hydrochloric acid into the blending liquid B, reacting for 25min to generate colloidal precipitate, and drying the colloidal precipitate at 200 ℃ for 7h to obtain a prefabricated material;
(4) 160kg of nitrile rubber, 30kg of a prefabricated material and 2.5kg of N-phenyl-N' -cyclohexyl-p-phenylenediamine are mixed and kept stand to obtain a mixed rubber;
(5) 3kg of pine tar and 2kg of sulfur were added to 230kg of the rubber compound, and vulcanization molding was carried out to obtain a high-strength brake caliper seal.
Strength Performance test
The strength of the seal was tested with reference to standard GB/528-.
Table 1 strength properties test results
The average tensile strength of the sealing element in the embodiment of the invention is 18.6MPa and is more than 14 MPa; the average elongation at break is 511.8 percent and is more than 390 percent, and in conclusion, the sealing element obtained by the invention has higher strength and is beneficial to prolonging the service life of the sealing element.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A method of making a high strength brake caliper seal, comprising the steps of:
(1) stirring and dispersing talcum powder, nano silicon carbide and deionized water, and stirring for 20-25min to obtain a blending solution A;
(2) dropwise adding a sodium silicate solution into the blending solution, and stirring at a high speed for 2-5min to obtain a blending solution B;
(3) adding hydrochloric acid into the blending liquid B, reacting for 20-25min to generate colloidal precipitate, and drying the colloidal precipitate at 150-200 ℃ for 6-7h to obtain a prefabricated material;
(4) mixing nitrile rubber, a prefabricated material and an anti-aging agent, and standing to obtain a mixed rubber;
(5) and adding pine tar and sulfur into the rubber compound, and vulcanizing and forming to obtain the high-strength brake caliper sealing member.
2. A method of making a high strength brake caliper seal according to claim 1, wherein the weight ratio of talc, nano silicon carbide, deionized water in step (1) is 30-40: 20-25: 200-300.
3. A method of making a high strength brake caliper seal according to claim 1, wherein the weight ratio of said sodium silicate solution to hydrochloric acid is 15-20: 10-12.
4. The method for preparing a high strength brake caliper seal according to claim 1, wherein the weight ratio of the nitrile rubber, the preform and the anti-aging agent in step (4) is 120-160: 25-30: 2-3.
5. The method of preparing a high strength brake caliper seal according to claim 1, wherein the weight ratio of rubber compound, pine tar, sulfur in step (5) is 200-: 2-3: 0.5-2.
6. A method of making a high strength brake caliper seal according to claim 1, wherein said drying in step (3) is at a temperature of 180 ℃ for a time of 6.5 hours.
7. A method of manufacturing a high strength brake caliper seal according to claim 1, wherein said anti-aging agent is any one of N-phenyl- α -aniline, N-phenyl- β -naphthylamine, N-phenyl-N' -cyclohexyl-p-phenylenediamine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344155.2A CN111363213A (en) | 2020-04-27 | 2020-04-27 | Preparation method of high-strength brake caliper sealing element |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010344155.2A CN111363213A (en) | 2020-04-27 | 2020-04-27 | Preparation method of high-strength brake caliper sealing element |
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| CN111363213A true CN111363213A (en) | 2020-07-03 |
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Citations (5)
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|---|---|---|---|---|
| US20020082333A1 (en) * | 2000-09-13 | 2002-06-27 | Rudiger Herpich | Silica gel-containing rubber compounds with organosilicon compounds as compounding agent |
| CN103694515A (en) * | 2013-11-29 | 2014-04-02 | 马鞍山市中澜橡塑制品有限公司 | Butadiene-acrylonitrile rubber sealing gasket material modified by adding attapulgite and preparation method thereof |
| CN107383478A (en) * | 2017-08-25 | 2017-11-24 | 宁国市宁和密封件厂 | A kind of damping noise reduction automobile brake pincers use seal quality of rubber materials |
| CN107540946A (en) * | 2017-09-08 | 2018-01-05 | 常州市鼎升环保科技有限公司 | A kind of preparation method of Halogen-free flame-retardant cable material |
| CN109942917A (en) * | 2019-03-27 | 2019-06-28 | 赛兴(北京)科技有限公司 | A kind of carborundum powder enhancing high-performance rubber material and preparation method thereof |
-
2020
- 2020-04-27 CN CN202010344155.2A patent/CN111363213A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020082333A1 (en) * | 2000-09-13 | 2002-06-27 | Rudiger Herpich | Silica gel-containing rubber compounds with organosilicon compounds as compounding agent |
| CN103694515A (en) * | 2013-11-29 | 2014-04-02 | 马鞍山市中澜橡塑制品有限公司 | Butadiene-acrylonitrile rubber sealing gasket material modified by adding attapulgite and preparation method thereof |
| CN107383478A (en) * | 2017-08-25 | 2017-11-24 | 宁国市宁和密封件厂 | A kind of damping noise reduction automobile brake pincers use seal quality of rubber materials |
| CN107540946A (en) * | 2017-09-08 | 2018-01-05 | 常州市鼎升环保科技有限公司 | A kind of preparation method of Halogen-free flame-retardant cable material |
| CN109942917A (en) * | 2019-03-27 | 2019-06-28 | 赛兴(北京)科技有限公司 | A kind of carborundum powder enhancing high-performance rubber material and preparation method thereof |
Non-Patent Citations (1)
| Title |
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