CN112592521A - Rubber sealing material for chemical pump - Google Patents
Rubber sealing material for chemical pump Download PDFInfo
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- CN112592521A CN112592521A CN202011313890.3A CN202011313890A CN112592521A CN 112592521 A CN112592521 A CN 112592521A CN 202011313890 A CN202011313890 A CN 202011313890A CN 112592521 A CN112592521 A CN 112592521A
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- rubber
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- diatomite
- carbon black
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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
- C08L11/00—Compositions of homopolymers or copolymers of chloroprene
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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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a rubber sealing material for a chemical pump, which has good mechanical properties and excellent low-temperature resistance, widens the application field of the rubber sealing material under the low-temperature condition, and is popularized. The carbon black is modified by utilizing hydroxyethyl methacrylate, so that the agglomeration degree of the carbon black can be obviously improved, and the dispersion of the carbon black in a rubber substrate is promoted, thereby improving the mechanical property of the rubber material; the method has the advantages that the gulonic acid mother liquor is utilized to treat the diatomite, and the gulonic acid mother liquor contains a large amount of gulonic acid, protein, formic acid, oxalic acid, butenedioic acid hydroxymethyl furfural, hydroxymethyl furoic acid, polypeptide and the like, so that abundant functional groups can be formed on the surface or in a pore channel of the diatomite to be adsorbed, the compatibility and the binding force of the diatomite and a rubber substrate are enhanced, stress dispersion points are formed in rubber, and the tensile property and the compressive property of the diatomite are improved.
Description
Technical Field
The invention belongs to the technical field of sealing materials, and particularly relates to a rubber sealing material for a chemical pump.
Background
The chemical pump is widely used for water supply and drainage in industry and city, and can also be used for irrigation and drainage in farmland and orchard for delivering clear water or other liquids with physical and chemical properties. The prior rubber sealing material has low mechanical property and poor low-temperature resistance, so that the application of the prior rubber sealing material in more aspects is limited.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a rubber sealing material for chemical pumps, which can improve the mechanical properties and low temperature resistance thereof.
The invention is realized by the following technical scheme:
a rubber sealing material for a chemical pump is prepared from the following raw materials in parts by weight:
10-15 parts of fluoroether rubber, 20-50 parts of acrylate rubber, 30-60 parts of chloroprene rubber, 20-30 parts of modified filler, 5-7 parts of dimethyl siloxane oil, 2-3 parts of vulcanizing agent and 1-2 parts of anti-aging agent.
Further, the preparation method comprises the following steps: the fluoroether rubber, the acrylate rubber and the chloroprene rubber are put into an internal mixer to be mixed for 30-40min at the temperature of 115-120 ℃, then the modified filler is added into the mixture to be continuously mixed for 20-30min, then the dimethyl siloxane oil, the vulcanizing agent and the anti-aging agent are added into the mixture to be thinly passed for 2-3 times at the temperature of 65-70 ℃, and the mixture is extruded and molded to obtain the product.
Further, the preparation method of the modified filler comprises the following steps:
(1) placing 10-12 parts by weight of carbon black at 70-80 ℃ and 2.0-2.5MPa for 3-5h, then carrying out ball milling at 10-15 ℃ for 10-20min, then adding the carbon black into 50-100 parts of a mixed solution of hydroxyethyl methacrylate latex and dichloromethane, carrying out ultrasonic treatment for 20-30min by using 48-52KHz, then carrying out freeze drying, removing the solvent, and carrying out ball milling on the obtained product again until the particle size is 200-800nm, thus obtaining the modified carbon black; the carbon black is modified by utilizing hydroxyethyl methacrylate, so that the agglomeration degree of the carbon black can be obviously improved, and the dispersion of the carbon black in a rubber substrate is promoted, thereby improving the mechanical property of the rubber material;
(2) freezing 10-15 parts of diatomite at-20 to-10 ℃ for 1-2h, baking at 100-120 ℃ for 1-2h, adding the diatomite into 30-50 parts of gulonic acid mother liquor, heating to 60-70 ℃, pressurizing to 0.8-1.0MPa, keeping the temperature and pressure for 2-3h, vacuumizing to-0.08 to-0.1 MPa, keeping the temperature and pressure for 1-2h, filtering, and drying the obtained product at 50-60 ℃ to obtain modified diatomite; the method has the advantages that the gulonic acid mother liquor is utilized to treat the diatomite, and because the gulonic acid mother liquor contains a large amount of gulonic acid, protein, formic acid, oxalic acid, butenedioic acid hydroxymethyl furfural, hydroxymethyl furoic acid, polypeptide and the like, rich functional group adsorption can be formed on the surface or in a pore channel of the diatomite, so that the compatibility and the binding force of the diatomite and a rubber substrate are enhanced, stress dispersion points are formed in rubber, and the tensile property and the compressive property of the diatomite are improved;
(3) freezing 5-6 parts of asphalt at-30 to-40 ℃ for 2-3h, then crushing the asphalt by a crusher at-10 to-15 ℃ until the particle size is 100-500mm, mixing the crushed asphalt with the products obtained in the steps (1) and (2), and performing ball milling for 20-30min to obtain a modified filler; organically combining the modified carbon black and the modified diatomite by using the asphalt to form a modified filler, wherein the modified carbon black and the modified diatomite absorb oil in the asphalt, the internal microstructure is changed, and the elasticity is increased;
further, the anti-aging agent is DNP.
Further, the vulcanizing agent is prepared by mixing sulfur and active carbon according to a mass ratio of 6: 1-5: 1, mixing, stirring and mixing to obtain the vulcanizing agent.
Further, in the mixed solution of the hydroxyethyl methacrylate latex and the dichloromethane in the step (1), the content of the hydroxyethyl methacrylate latex is 20-30%, the balance is dichloromethane, and the solid content of the hydroxyethyl methacrylate latex is 30-35%.
The invention has the beneficial effects that: the rubber sealing material prepared by the invention has good mechanical properties and excellent low-temperature resistance, widens the application field of the rubber sealing material under the low-temperature condition, and is popularized. The carbon black is modified by utilizing hydroxyethyl methacrylate, so that the agglomeration degree of the carbon black can be obviously improved, and the dispersion of the carbon black in a rubber substrate is promoted, thereby improving the mechanical property of the rubber material; the method has the advantages that the gulonic acid mother liquor is utilized to treat the diatomite, and because the gulonic acid mother liquor contains a large amount of gulonic acid, protein, formic acid, oxalic acid, butenedioic acid hydroxymethyl furfural, hydroxymethyl furoic acid, polypeptide and the like, rich functional group adsorption can be formed on the surface or in a pore channel of the diatomite, so that the compatibility and the binding force of the diatomite and a rubber substrate are enhanced, stress dispersion points are formed in rubber, and the tensile property and the compressive property of the diatomite are improved; the modified carbon black and the modified diatomite are organically combined by using the asphalt to form the modified filler, wherein the modified carbon black and the modified diatomite absorb oil in the asphalt, the internal microstructure is changed, and the elasticity is increased, so that the tensile cold resistance coefficient/% -0.3 at 50 ℃ below zero and the compression cold resistance coefficient/% -0.35 at 50 ℃ below zero of the obtained rubber sealing material are increased, and the low-temperature resistance performance of the rubber sealing material is improved.
Detailed Description
The invention is illustrated by the following specific examples, which are not intended to be limiting.
Example 1
A rubber sealing material for a chemical pump is prepared from the following raw materials in parts by weight:
10 parts of fluoroether rubber, 20 parts of acrylate rubber, 30 parts of chloroprene rubber, 20 parts of modified filler, 5 parts of dimethyl siloxane oil, 2 parts of vulcanizing agent and 1 part of anti-aging agent.
Further, the preparation method comprises the following steps: mixing the fluoroether rubber, the acrylate rubber and the chloroprene rubber in an internal mixer, internally mixing for 30min at 115 ℃, adding the modified filler, continuously mixing for 20min, adding the dimethyl siloxane oil, the vulcanizing agent and the anti-aging agent, thinly passing for 2 times at 65 ℃, extruding and molding to obtain the composite material.
Further, the preparation method of the modified filler comprises the following steps:
(1) placing 10 parts by weight of carbon black at 70 ℃ and 2.0MPa for 3h, then carrying out ball milling at 10 ℃ for 10min, then adding the carbon black into 50 parts of a mixed solution of hydroxyethyl methacrylate latex and dichloromethane, carrying out ultrasonic treatment for 20min by using 48KHz, then carrying out freeze drying, removing a solvent, and carrying out ball milling on the obtained product again until the particle size is 200nm to obtain modified carbon black;
(2) freezing 10 parts of diatomite at-20 ℃ for 1h, then baking at 100 ℃ for 1h, then adding the diatomite into 30 parts of gulonic acid mother liquor, heating to 60 ℃, pressurizing to 0.8MPa, keeping the temperature and pressure for 2h, vacuumizing to-0.08 MPa, keeping the temperature and pressure for 1h, filtering, and drying the obtained product at 50 ℃ to obtain modified diatomite;
(3) freezing 5 parts of asphalt at-30 ℃ for 2h, then crushing the asphalt by a crusher at-10 ℃ until the particle size is 100mm, then mixing the crushed asphalt with the products obtained in the step (1) and the step (2), and carrying out ball milling for 20min to obtain the modified filler.
Further, the anti-aging agent is DNP.
Further, the vulcanizing agent is prepared by mixing sulfur and active carbon according to a mass ratio of 6: 1, mixing, stirring and mixing to obtain the vulcanizing agent.
Further, in the mixed solution of the hydroxyethyl methacrylate latex and the dichloromethane in the step (1), the content of the hydroxyethyl methacrylate latex is 20%, the balance is dichloromethane, and the solid content of the hydroxyethyl methacrylate latex is 30%.
Example 2
A rubber sealing material for a chemical pump is prepared from the following raw materials in parts by weight:
12 parts of fluoroether rubber, 30 parts of acrylate rubber, 40 parts of chloroprene rubber, 25 parts of modified filler, 6 parts of dimethyl siloxane oil, 3 parts of vulcanizing agent and 2 parts of anti-aging agent.
Further, the preparation method comprises the following steps: mixing the fluoroether rubber, the acrylate rubber and the chloroprene rubber in an internal mixer, internally mixing for 35min at 118 ℃, adding the modified filler, continuously mixing for 25min, adding the dimethyl siloxane oil, the vulcanizing agent and the anti-aging agent, thinly passing for 3 times at 68 ℃, extruding and molding to obtain the product.
Further, the preparation method of the modified filler comprises the following steps:
(1) placing 11 parts by weight of carbon black at 75 ℃ and 2.2MPa for 4h, then carrying out ball milling at 12 ℃ for 15min, then adding the carbon black into 80 parts of a mixed solution of hydroxyethyl methacrylate latex and dichloromethane, carrying out ultrasonic treatment for 25min by using 50KHz, then carrying out freeze drying, removing a solvent, and carrying out ball milling on the obtained product again until the particle size is 600nm to obtain modified carbon black;
(2) freezing 13 parts of diatomite at-15 ℃ for 2h, then baking at 110 ℃ for 2h, then adding the diatomite into 40 parts of gulonic acid mother liquor, heating to 65 ℃, pressurizing to 0.9MPa, keeping the temperature and pressure for 3h, vacuumizing to-0.09 MPa, continuing to keep the temperature and pressure for 2h, filtering, and drying the obtained product at 55 ℃ to obtain modified diatomite;
(3) freezing 6 parts of asphalt at-35 ℃ for 3h, then crushing the asphalt by a crusher at-13 ℃ until the particle size is 300mm, then mixing the crushed asphalt with the products obtained in the steps (1) and (2), and carrying out ball milling for 25min to obtain the modified filler.
Further, the anti-aging agent is DNP.
Further, the vulcanizing agent is prepared by mixing sulfur and active carbon according to a mass ratio of 5: 1, mixing, stirring and mixing to obtain the vulcanizing agent.
Further, in the mixed solution of the hydroxyethyl methacrylate latex and the dichloromethane in the step (1), the content of the hydroxyethyl methacrylate latex is 25%, the balance is dichloromethane, and the solid content of the hydroxyethyl methacrylate latex is 33%.
Example 3
A rubber sealing material for a chemical pump is prepared from the following raw materials in parts by weight:
15 parts of fluoroether rubber, 50 parts of acrylate rubber, 60 parts of chloroprene rubber, 30 parts of modified filler, 7 parts of dimethyl siloxane oil, 3 parts of vulcanizing agent and 2 parts of anti-aging agent.
Further, the preparation method comprises the following steps: mixing the fluoroether rubber, the acrylate rubber and the chloroprene rubber in an internal mixer, internally mixing for 40min at 120 ℃, adding the modified filler, continuously mixing for 30min, adding the dimethyl siloxane oil, the vulcanizing agent and the anti-aging agent, thinly passing for 3 times at 70 ℃, extruding and molding to obtain the product.
Further, the preparation method of the modified filler comprises the following steps:
(1) placing 12 parts by weight of carbon black at 80 ℃ and 2.5MPa for 5h, then carrying out ball milling at 15 ℃ for 20min, then adding the carbon black into 100 parts of a mixed solution of hydroxyethyl methacrylate latex and dichloromethane, carrying out ultrasonic treatment for 30min by using 52KHz, then carrying out freeze drying, removing a solvent, and carrying out ball milling on the obtained product again until the particle size is 800nm to obtain modified carbon black;
(2) freezing 15 parts of diatomite at-10 ℃ for 2h, then baking at 120 ℃ for 2h, then adding the diatomite into 50 parts of gulonic acid mother liquor, heating to 70 ℃, pressurizing to 1.0MPa, keeping the temperature and pressure for 3h, vacuumizing to-0.1 MPa, continuing to keep the temperature and pressure for 2h, filtering, and drying the obtained product at 60 ℃ to obtain modified diatomite;
(3) freezing 6 parts of asphalt at-40 ℃ for 3h, then crushing the asphalt by a crusher at-15 ℃ until the particle size is 500mm, then mixing the crushed asphalt with the products obtained in the step (1) and the step (2), and carrying out ball milling for 30min to obtain the modified filler.
Further, the anti-aging agent is DNP.
Further, the vulcanizing agent is prepared by mixing sulfur and active carbon according to a mass ratio of 5: 1, mixing, stirring and mixing to obtain the vulcanizing agent.
Further, in the mixed solution of the hydroxyethyl methacrylate latex and the dichloromethane in the step (1), the content of the hydroxyethyl methacrylate latex is 30%, the balance is dichloromethane, and the solid content of the hydroxyethyl methacrylate latex is 35%.
Comparative example 1
The procedure is the same as in example 2 except that the modified filler is not added.
Comparative example 2
This comparative example is similar to example 2 except that the method steps are the same except that the addition of the hydroxyethyl methacrylate latex is omitted.
Comparative example 3
Compared with example 2, the comparative example omits the addition of the gulonic acid mother liquor, and the method steps are the same except for this.
And (3) performance testing: the tensile strength, elongation at break and permanent deformation at break of each group of materials are measured according to GB/T528-1998; the-50 ℃ tensile cold-resistant coefficient of each group of materials is tested according to HG/T3867-2008, and the-50 ℃ compressive cold-resistant coefficient of each group of materials is tested according to HG/T3866-2008.
The test results are shown in table 1:
TABLE 1
| Tensile strength/MPa | Elongation at break/%) | Tear permanent set/%) | -50 ℃ tensile cold resistance coefficient% | -50 ℃ compression cold resistance coefficient% | |
| Example 1 | 18.7 | 658 | 4.2 | 0.33 | 0.37 |
| Example 2 | 19.2 | 664 | 3.8 | 0.34 | 0.38 |
| Example 3 | 18.9 | 661 | 4.1 | 0.31 | 0.37 |
| Comparative example 1 | 12.2 | 530 | 6.2 | 0.20 | 0.22 |
| Comparative example 2 | 13.5 | 566 | 6.5 | 0.22 | 0.24 |
| Comparative example 3 | 13.7 | 535 | 6.5 | 0.21 | 0.24 |
As can be seen from Table 1, the rubber sealing material prepared by the invention has good mechanical properties and excellent low-temperature resistance, widens the application field of the rubber sealing material under low-temperature conditions, and is popularized.
Claims (6)
1. The rubber sealing material for the chemical pump is characterized by being prepared from the following raw materials in parts by weight:
10-15 parts of fluoroether rubber, 20-50 parts of acrylate rubber, 30-60 parts of chloroprene rubber, 20-30 parts of modified filler, 5-7 parts of dimethyl siloxane oil, 2-3 parts of vulcanizing agent and 1-2 parts of anti-aging agent.
2. The rubber sealing material for the chemical pump according to claim 1, which is prepared by the following steps: the fluoroether rubber, the acrylate rubber and the chloroprene rubber are put into an internal mixer to be mixed for 30-40min at the temperature of 115-120 ℃, then the modified filler is added into the mixture to be continuously mixed for 20-30min, then the dimethyl siloxane oil, the vulcanizing agent and the anti-aging agent are added into the mixture to be thinly passed for 2-3 times at the temperature of 65-70 ℃, and the mixture is extruded and molded to obtain the product.
3. The rubber sealing material for the chemical pump as claimed in claim 1, wherein the preparation method of the modified filler comprises the following steps:
(1) placing 10-12 parts by weight of carbon black at 70-80 ℃ and 2.0-2.5MPa for 3-5h, then carrying out ball milling at 10-15 ℃ for 10-20min, then adding the carbon black into 50-100 parts of a mixed solution of hydroxyethyl methacrylate latex and dichloromethane, carrying out ultrasonic treatment for 20-30min by using 48-52KHz, then carrying out freeze drying, removing the solvent, and carrying out ball milling on the obtained product again until the particle size is 200-800nm, thus obtaining the modified carbon black;
(2) freezing 10-15 parts of diatomite at-20 to-10 ℃ for 1-2h, baking at 100-120 ℃ for 1-2h, adding the diatomite into 30-50 parts of gulonic acid mother liquor, heating to 60-70 ℃, pressurizing to 0.8-1.0MPa, keeping the temperature and pressure for 2-3h, vacuumizing to-0.08 to-0.1 MPa, keeping the temperature and pressure for 1-2h, filtering, and drying the obtained product at 50-60 ℃ to obtain modified diatomite;
(3) freezing 5-6 parts of asphalt at-30 to-40 ℃ for 2-3h, then crushing the asphalt by a crusher at-10 to-15 ℃ until the particle size is 100-500mm, then mixing the crushed asphalt with the products obtained in the steps (1) and (2), and performing ball milling for 20-30min to obtain the modified filler.
4. The rubber sealing material for chemical pumps as claimed in claim 1, wherein the antioxidant is antioxidant DNP.
5. The rubber sealing material for the chemical pump according to claim 1, wherein the vulcanizing agent is prepared by mixing sulfur and activated carbon in a mass ratio of 6: 1-5: 1, mixing, stirring and mixing to obtain the vulcanizing agent.
6. The rubber sealing material for the chemical pump according to claim 3, wherein in the mixed solution of the hydroxyethyl methacrylate latex and the dichloromethane in the step (1), the content of the hydroxyethyl methacrylate latex is 20-30%, the balance is dichloromethane, and the solid content of the hydroxyethyl methacrylate latex is 30-35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313890.3A CN112592521A (en) | 2020-11-21 | 2020-11-21 | Rubber sealing material for chemical pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313890.3A CN112592521A (en) | 2020-11-21 | 2020-11-21 | Rubber sealing material for chemical pump |
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| Publication Number | Publication Date |
|---|---|
| CN112592521A true CN112592521A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011313890.3A Pending CN112592521A (en) | 2020-11-21 | 2020-11-21 | Rubber sealing material for chemical pump |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106633256A (en) * | 2016-09-30 | 2017-05-10 | 合肥华运机械制造有限公司 | Rubber sealing material with high wear resistance and for chemical pump |
| CN107556757A (en) * | 2017-10-19 | 2018-01-09 | 开平市格莱美卫浴配件有限公司 | A kind of rubber packing material |
| CN111117121A (en) * | 2019-12-29 | 2020-05-08 | 河北新尔特橡塑密封有限公司 | Heat-shrinkage-resistant sealing ring and preparation method thereof |
-
2020
- 2020-11-21 CN CN202011313890.3A patent/CN112592521A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106633256A (en) * | 2016-09-30 | 2017-05-10 | 合肥华运机械制造有限公司 | Rubber sealing material with high wear resistance and for chemical pump |
| CN107556757A (en) * | 2017-10-19 | 2018-01-09 | 开平市格莱美卫浴配件有限公司 | A kind of rubber packing material |
| CN111117121A (en) * | 2019-12-29 | 2020-05-08 | 河北新尔特橡塑密封有限公司 | Heat-shrinkage-resistant sealing ring and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 杨清芝: "《实用橡胶工艺学》", 30 June 2005, 化学工业出版社 * |
| 缪桂韶: "《橡胶配方设计》", 31 March 2000, 华南理工大学出版社 * |
| 陈士朝等: "《橡胶技术与制造概论》", 30 September 2002, 中国石化出版社 * |
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Application publication date: 20210402 |