CN110330750B - Low-compression permanent deformation carboxylic acid type acrylate rubber and preparation method thereof - Google Patents
Low-compression permanent deformation carboxylic acid type acrylate rubber and preparation method thereof Download PDFInfo
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Abstract
The invention provides a carboxylic acid type acrylate rubber with low compression permanent deformation and a preparation method thereof, belonging to the technical field of synthetic rubber matching and processing. A low compression set carboxylic acid type acrylate rubber comprises the following raw materials in parts by weight: 100 parts of carboxylic acid type acrylate rubber, 10-50 parts of fast extrusion carbon black, 10-50 parts of precipitated white carbon black, 1-5 parts of silane coupling agent, 1-3 parts of No. 1 vulcanizing agent, 1-4 parts of accelerator, 1-3 parts of processing aid and 2-5 parts of anti-aging agent, wherein the mass ratio of the fast extrusion carbon black to the precipitated white carbon black is 1: 1. The material has good low compression set performance, good thermal stability, high hardness and high tensile strength. The preparation method of the carboxylic acid type acrylate rubber with low compression permanent deformation is simple, and the prepared carboxylic acid type acrylate rubber has good performance.
Description
Technical Field
The invention belongs to the technical field of synthetic rubber matching and processing, and particularly relates to a low-compression permanent deformation carboxylic acid type acrylate rubber and a preparation method thereof.
Background
The acrylate rubber (ACM) is an elastic material formed by copolymerizing acrylate and a monomer with a crosslinking reactive group, and the like, and the main chain of the acrylate rubber is in a saturated structure, so that the acrylate rubber has the performances of heat resistance, ultraviolet radiation resistance and ozone resistance; the side chain of the oil-resistant polyester resin contains polar ester groups, so that the oil-resistant polyester resin also has excellent oil resistance. The acrylate rubber is mainly used for manufacturing heat-resistant and oil-resistant sealing elements, oil pipes and the like, and is mainly used in the fields of automobiles, motorcycles, power transformers, ships, petrochemical industry and the like.
The acrylic rubber has large compression set, which is a performance defect of sealing materials, and the large deformation easily causes poor sealing and easily causes the adverse effect of oil leakage.
The physical and mechanical properties of acrylate rubbers are affected by a number of factors, including: the structure of the rubber (the raw material ratio of the polymer), the molecular weight of the rubber, the compounding and processing technology of the rubber, and the like.
Acrylate rubbers are of different types, and are currently more commonly classified according to the type of cure site monomer: active chlorine type, carboxylic acid type, epoxy type and the like, and different types of acrylate rubber have different matching processing technologies. Different types of rubber have different compression set properties, and in comparison, the carboxylic acid type rubber has better compression set properties which are superior to those of active chlorine type rubber and epoxy type rubber, but the higher the compression set property is, the better the compression set property is, and can meet the requirements of some harsh use conditions, so the improvement of the compression set property of the carboxylic acid type rubber still has important significance.
In the matching processing link of carboxylic acid type acrylate rubber, the method for reducing the compression permanent deformation of the sizing material at present has the following effects:
1. examples of fillers suitable for the acrylate rubber include carbon black (excluding acidic channel black), precipitated silica (excluding acidic fumed silica), and light calcium carbonate.
The white carbon black generally needs to be pretreated by a silane coupling agent, one end of the coupling agent is linked with a white carbon black molecular bond, and the other end of the coupling agent is linked with a rubber molecular bond to play a role of a bridge frame so as to form the binding force of rubber and a white carbon black molecular chain. The traditional treatment method is to directly add the silane coupling agent into the white carbon black and mix the silane coupling agent and the white carbon black evenly, so that one end of the coupling agent is combined with the molecular bond of the white carbon black, and the other end is vacant to wait for the combination with the molecular bond of the rubber.
The filler has a large influence on the compression set property of the rubber material.
The use of soft carbon black, such as spray carbon black, and low-reinforcing inorganic fillers such as light calcium carbonate, Zingiber officinale Roscoe powder, talc, etc., can maintain the rubber with good elasticity, and these fillers have good thermal aging resistance, thereby reducing the compression set. However, the fillers have poor reinforcing effect on the rubber, influence important performance indexes such as hardness, tensile strength and the like of the rubber, and have severely limited application range.
The hard carbon black (such as high wear-resistant carbon black, fast extrusion carbon black and the like) has good reinforcing effect, but the rubber material has poor elasticity and poor thermal aging resistance, so the compression permanent deformation of the rubber material is large.
The precipitated silica in the inorganic filler has good thermal aging resistance and good reinforcing effect, but the rubber material has poor elasticity, so the compression permanent deformation is large.
2. The vulcanization time is prolonged to improve the vulcanization degree and reduce the deformation.
The effect is obtained when the vulcanization of the rubber compound is insufficient, and the effect of reducing the compression set is not significant under the condition that the vulcanization is already sufficient.
These methods have the common disadvantage of not increasing the hardness and tensile strength of the compound while reducing the compression set of the compound.
Disclosure of Invention
The invention aims to provide the carboxylic acid type acrylate rubber with low compression set, which not only has better compression set performance, but also has better thermal stability, higher hardness and higher tensile strength.
The invention also aims to provide a preparation method of the carboxylic acid type acrylate rubber with low compression permanent deformation, which is simple and has better comprehensive performance.
In order to achieve the above purpose, the solution adopted by the invention is as follows:
a low compression set carboxylic acid type acrylate rubber comprises the following raw materials in parts by weight: 100 parts of carboxylic acid type acrylate rubber, 10-50 parts of fast extrusion carbon black, 10-50 parts of precipitated white carbon black, 1-5 parts of silane coupling agent, 1-3 parts of No. 1 vulcanizing agent, 2-6 parts of accelerator, 1-3 parts of processing aid and 2-5 parts of anti-aging agent, wherein the mass ratio of the fast extrusion carbon black to the precipitated white carbon black is 1:1, and the mass ratio of the No. 1 vulcanizing agent to the accelerator is 1: 2.
A preparation method of carboxylic acid type acrylate rubber with low compression set comprises the following steps:
adding carboxylic acid type acrylate rubber, fast extrusion carbon black, precipitated white carbon black, a processing aid and an anti-aging agent into an open mill for primary mixing to prepare a first mixed rubber;
when the temperature of the first rubber compound is 50-70 ℃, adding a silane coupling agent, and uniformly mixing to obtain a second rubber compound;
then adding No. 1 vulcanizing agent and accelerator, and then carrying out vulcanization molding to obtain the low compression permanent deformation carboxylic acid type acrylate rubber.
The carboxylic acid type acrylate rubber with low compression set and the preparation method thereof have the beneficial effects that the carboxylic acid type acrylate rubber prepared by the invention has better thermal aging performance and low compression set performance by matching the fast extrusion carbon black and the precipitated white carbon black and simultaneously matching the No. 1 vulcanizing agent and the accelerator; the silane coupling agent is added in the mixing process of the rubber material, the carboxylic acid type acrylate rubber and the white carbon black are uniformly present in a system at the same time, when the silane coupling agent is added, two ends of the silane coupling agent can be simultaneously combined with two objects, the condition that one end is combined and the other end is vacant for a long time when the white carbon black is pretreated by the silane coupling agent is avoided, wherein when the silane coupling agent is added for mixing, the temperature of the first mixed rubber is 50-70 ℃, each molecular chain has higher kinetic energy, the silane coupling agent is favorably and quickly and firmly combined with the rubber and the white carbon black molecular chain, the coupling strength between the rubber and the white carbon black is greatly improved, the molecular chain with a reticular structure formed when the rubber is vulcanized has better compression resistance, and the compression permanent deformation performance of the rubber is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The following is a detailed description of a carboxylic acid type acrylate rubber with low compression set and a method for preparing the same according to an embodiment of the present invention.
The embodiment of the invention provides a low-compression permanent deformation carboxylic acid type acrylate rubber, which comprises the following raw materials in parts by weight: 100 parts of carboxylic acid type acrylate rubber, 10-50 parts of fast extrusion carbon black, 10-50 parts of precipitated white carbon black, 1-5 parts of silane coupling agent, 1-3 parts of No. 1 vulcanizing agent, 2-6 parts of accelerator, 1-3 parts of processing aid and 2-5 parts of anti-aging agent. The mass ratio of the fast extrusion carbon black to the precipitated white carbon black is 1:1, and the mass ratio of the No. 1 vulcanizing agent to the accelerator is 1: 2.
Wherein the fast extrusion carbon black is a variety of hard carbon black, is produced by an oil furnace method, and has the particle size of 40-48 nm. The rubber material has the advantages of good processing performance and higher stress at definite elongation due to larger grain diameter and higher structure, small heat generation and good heat conductivity, but not good high temperature resistance. The precipitated white carbon black has porosity and large specific surface area, has larger dispersing power in raw rubber, shows high reinforcing property after being filled in rubber after being treated by the silane coupling agent, has better thermal aging performance than fast extrusion carbon black, but has poorer elasticity than the fast extrusion carbon black. The mass ratio of the fast extrusion carbon black to the precipitated white carbon black is 1:1, and the fast extrusion carbon black and the precipitated white carbon black are used together as reinforcing agents, so that the reinforcing effect and the heat-resistant aging performance can be considered.
The No. 1 vulcanizing agent is matched with the accelerator, so that the performance of the carboxylic acid type acrylate rubber is further improved. The accelerator is preferably accelerator DOTG. In the embodiment of the invention, the 1 # vulcanizing agent is matched with the accelerator, so that the prepared carboxylic acid type acrylate rubber not only has better compression permanent deformation performance, but also has better thermal stability, higher hardness and higher tensile strength.
Furthermore, the silane coupling agent can improve the dispersibility and the adhesive force of the filler in the rubber, improve the compatibility between the inorganic filler and the rubber, improve the process performance and improve the mechanical, electrical and weather resistance of filled plastics (including rubber). The silane coupling agent in the embodiment of the invention is selected from one of KH-550 and Si-69.
Furthermore, the processing aid is stearic acid which is used as vegetable oil fatty acid, and after the stearic acid is added according to a certain proportion in the processing process of rubber, the stearic acid can be beneficial to quickly extruding the dispersion of carbon black and precipitated white carbon black, and can play roles of softening and plasticizing, so that the viscosity of rubber can be reduced, the technological performance can be improved, and the plasticity of the rubber can be obviously improved.
Furthermore, chemicals capable of delaying rubber aging and prolonging the service life of rubber are added in the production process of the anti-aging agent in the rubber, wherein the anti-aging agent is preferably TK-100.
A preparation method of carboxylic acid type acrylate rubber with low compression set comprises the following steps:
adding carboxylic acid type acrylate rubber, fast extrusion carbon black, precipitated white carbon black, a processing aid and an anti-aging agent into an open mill for first mixing to prepare first mixed rubber. The first mixing of the embodiment of the invention comprises the following specific steps: (1) weighing carboxylic acid type acrylate rubber, quickly extruding carbon black, precipitated white carbon black, a processing aid and an anti-aging agent according to a matching proportion; (2) opening an open mill, pressing stearic acid on a roller, then putting carboxylic acid type acrylate rubber into the roller, wrapping the roller with the rubber, and adjusting the roller distance to keep a small amount of accumulated rubber on the roller; (3) uniformly adding the fast-extrusion carbon black, the precipitated white carbon black and the anti-aging agent into a roller for mixing. When half of the quick extrusion carbon black and the precipitated silica are added, 3/4 cutters are used for 1 time each side, and then the rest of the quick extrusion carbon black and the precipitated silica are added, 3/4 cutters are used for 2 times each side.
When the temperature of the first rubber compound is 50-70 ℃, adding a silane coupling agent to prepare a second rubber compound; when the temperature of the first rubber compound is 50-70 ℃, the purpose of adding the silane coupling agent is to enable two ends of the silane coupling agent to be simultaneously combined with two linked objects (carboxylic acid type acrylate rubber and white carbon black) when the carboxylic acid type acrylate rubber and the white carbon black are simultaneously and uniformly present in a system, so that the condition that one end is combined with the other end is vacant for a long time when the white carbon black is pretreated by the silane coupling agent is avoided. When the silane coupling agent is added for mixing, the temperature of the first mixed rubber is 50-70 ℃, each molecular chain has higher kinetic energy, so that the silane coupling agent is favorably and quickly and firmly combined with the molecular chains of the rubber and the white carbon black, the coupling strength between the rubber and the white carbon black is greatly improved, the molecular chains of a net structure formed during rubber vulcanization have better pressure resistance, and the compression permanent deformation performance of the rubber is improved.
Preferably, the silane coupling agent is added when the temperature of the first rubber compound is 65 ℃. The second mixing in the embodiment of the invention comprises the following specific steps: when the temperature of the first rubber compound is 50-70 ℃, adding a silane coupling agent for mixing, carrying out 3/4 cutters for 3 times on each side, feeding sheets, rolling and thinning for 6 times, discharging sheets and cooling.
Then adding No. 1 vulcanizing agent and accelerator, and then carrying out vulcanization molding to obtain the low compression permanent deformation carboxylic acid type acrylate rubber. The vulcanization molding comprises the following specific steps: (1) when the temperature of the second rubber compound is not higher than 50 ℃, adding a vulcanizing agent and an accelerator, rolling, thinning and passing, and discharging and standing; (2) when the rubber is parked for 12h, then the rubber is rehearsed, rolled and thinly passed for 6 times, and then the rubber is taken out and vulcanized on a vulcanizing machine.
Example 1
A preparation method of carboxylic acid type acrylate rubber with low compression set comprises the following steps:
(1) weighing the following raw materials in parts by weight: acrylate rubber ACM-120:100 parts of (A); fast extrusion of carbon black N-550: 25 parts of (1); precipitating white carbon black: 25 parts of (1); silane coupling agent Si-69:2 parts of (1); anti-aging agent TK-100: 5 parts of a mixture; stearic acid: 2 parts of (1); no. 1 vulcanizing agent: 1 part; accelerator DOTG: and 2 parts.
(2) Opening an open mill, pressing stearic acid on a roller, then putting carboxylic acid type acrylate rubber into the roller, wrapping the roller with the rubber, and adjusting the roller distance to keep a small amount of accumulated rubber on the roller;
(3) uniformly adding the fast extrusion carbon black, the precipitated white carbon black and the anti-aging agent into a roller for mixing, carrying out 3/4 cutters for 1 time on each side when half of the fast extrusion carbon black and the precipitated white carbon black are added, then carrying out 3/4 cutters for 2 times when the rest fast extrusion carbon black and the precipitated white carbon black are added, and completely adding the materials scattered in a material receiving disc into a rubber material after sweeping up;
(4) slowly adding a silane coupling agent when the temperature of the first rubber compound is 65 ℃;
(5) cutting 3/4 knife at each side for 3 times, discharging, rolling, thinning, passing through for 6 times, discharging, and cooling;
(6) when the temperature of the second rubber compound is not higher than 50 ℃, adding a No. 1 vulcanizing agent and an accelerant DOTG, rolling, thinning and passing through, and discharging and standing;
(7) standing for 12h, then re-practicing, rolling and thinly passing for 6 times, and taking out the sheet.
The prepared material is vulcanized and then tested, and the steps are as follows:
(1) and vulcanizing in a vulcanizing mold to prepare a vulcanized test piece and a test block.
(2) And putting the vulcanized test piece and the test piece into a blast oven, baking for 4 hours at 170 ℃, and turning off the power supply of the oven to naturally cool the vulcanized test piece and the test piece to room temperature.
(3) And the test piece is parked according to the specification of the rubber detection standard.
(4) And after the test piece is parked for the specified time, detecting the performance index of the test piece.
(5) And placing the test block into a compression permanent deformation detection clamp, placing the test block and the test block into an aging test box together, and carrying out an aging test under the condition of 150 ℃ multiplied by 70 hours.
The test results are shown in table 1.
Example 2
A preparation method of carboxylic acid type acrylate rubber with low compression set comprises the following steps:
(1) weighing the following raw materials in parts by weight: acrylate rubber ACM-220: 100 parts of (A); fast extrusion of carbon black N-550: 25 parts of (1); 25 parts of precipitated white carbon black, silane coupling agent Si-69:2 parts of (1); anti-aging agent TK-100: 5 parts of a mixture; stearic acid: 2 parts of (1); 1 part of No. 1 vulcanizing agent; 2 parts of accelerator DOTG;
the processing and testing methods were the same as in example 1, and the testing results are shown in Table 1.
Example 3
A preparation method of carboxylic acid type acrylate rubber with low compression set comprises the following steps:
(1) weighing the following raw materials in parts by weight: acrylate rubber ACM-320: 100 parts of (A); fast extrusion of carbon black N-550: 25 parts of (1); and (3) white carbon black precipitation: 25 parts of (1); silane coupling agent Si-69:2 parts of (1); anti-aging agent TK-100: 5 parts of a mixture; stearic acid: 2 parts of (1); no. 1 vulcanizing agent: 1 part, accelerator DOTG: 2 parts of (1);
the processing and testing methods were the same as in example 1, and the testing results are shown in Table 1.
Comparative example 1 (variation of carbon Black combinations, only quick extrusion carbon Black)
A preparation method of a conventional carboxylic acid type acrylate rubber comprises the following steps:
(1) weighing the following raw materials in parts by weight: acrylate rubber ACM-120:100 parts of fast extrusion carbon black N-550: 50 parts of a mixture; anti-aging agent TK-100: 5 parts of a mixture; stearic acid: 2 parts of (1); no. 1 vulcanizing agent: 1.0 part; DOTG: 2.0 parts of (B);
(2) opening an open mill, pressing stearic acid on a roller, then putting carboxylic acid type acrylate rubber into the roller, wrapping the roller with the rubber, and adjusting the roller distance to keep a small amount of accumulated rubber on the roller;
(3) uniformly adding the fast extrusion carbon black and the anti-aging agent into a roller for mixing, carrying out 3/4 cutters for 1 time on each side when half of the fast extrusion carbon black is added, and carrying out 3/4 cutters for 2 times when the rest of the fast extrusion carbon black is added;
(4) cutting 3/4 knife at each side for 3 times, discharging, rolling, thinning, passing through for 6 times, discharging, and cooling;
(5) when the temperature of the second rubber compound is not higher than 50 ℃, adding a No. 1 vulcanizing agent and an accelerant DOTG, rolling, thinning and passing through, and discharging and standing;
(6) standing for 12h, then re-practicing, rolling and thinly passing for 6 times, and taking out the sheet.
The material prepared above was vulcanized and tested in the same manner as in example 1. The results are shown in Table 1.
Comparative example 2 (changing the carbon Black combination, only precipitated silica)
A preparation method of a conventional carboxylic acid type acrylate rubber comprises the following steps:
(1) weighing the following raw materials in parts by weight: acrylate rubber ACM-120:100 parts of (A); precipitation method white carbon black: 50 parts of a mixture; 2 parts of silane coupling agent Si-69; anti-aging agent TK-100: 5 parts of a mixture; stearic acid: 2 parts of (1); no. 1 vulcanizing agent: 1.0 part; DOTG: 2.0 parts of (B);
the silane coupling agent is directly added into the white carbon black at normal temperature, the mixture is uniformly mixed for standby, the processing and detection method is the same as that of the example 1, and the detection results are shown in the table 1.
Comparative example 3 (silane coupling agent added at Normal temperature)
A preparation method of common active chlorine type acrylate rubber comprises the following steps:
(1) weighing the following raw materials in parts by weight: 100 parts of acrylate rubber ACM-120; fast extrusion of carbon black N-550: 25 parts of (1); and (3) white carbon black precipitation: 25 parts of (1); silane coupling agent KH-550: 2 parts of an anti-aging agent TK-100: 5 parts of a mixture; stearic acid: 2 parts of (1); no. 1 vulcanizing agent: 1.0 part; DOTG: 2.0 parts.
(2) And at room temperature, directly adding the silane coupling agent into the precipitated white carbon black, and uniformly mixing for later use.
(3) Opening an open mill, pressing stearic acid on a roller, then putting rubber into the roller, wrapping the roller with the rubber, and adjusting the roller distance to keep a small amount of accumulated rubber on the roller;
(4) uniformly adding the fast extrusion carbon black, the precipitated white carbon black and the anti-aging agent into a roller for mixing, carrying out 3/4 cutters for 1 time on each side when half of the fast extrusion carbon black and the precipitated white carbon black are added, then adding the rest fast extrusion carbon black and the precipitated white carbon black, carrying out 3/4 cutters for 2 times on each side, sweeping up the materials scattered in a material receiving disc, and then completely adding the materials into a rubber material;
(5) cutting 3/4 knife at each side for 3 times, discharging, rolling, thinning, passing through for 6 times, discharging, and cooling;
(6) when the temperature of the rubber compound is not higher than 50 ℃, adding a vulcanizing agent, rolling, thinning and passing through, and discharging and standing;
(7) standing for 12h, then re-practicing, rolling and thinly passing for 6 times, and taking out the sheet.
The prepared material is vulcanized and then tested, and the steps are as follows:
(1) and vulcanizing in a vulcanizing mold to prepare a vulcanized test piece and a test block.
(2) And putting the vulcanized test piece and the test piece into a blast oven, baking for 8 hours at 170 ℃, and turning off the power supply of the oven to naturally cool the vulcanized test piece and the test piece to room temperature.
(3) And the test piece is parked according to the specification of the rubber detection standard.
(4) And after the test piece is parked for the specified time, detecting the performance index of the test piece.
(5) And placing the test block into a compression permanent deformation detection clamp, placing the test block and the test block into an aging test box together, and carrying out an aging test under the condition of 150 ℃ multiplied by 70 hours.
The results are shown in Table 1.
TABLE 1
| Rubber type | Hardness (Shao A, degree) | Elongation at Break (%) | Tensile strength (Mpa) | Compression set percentage (150 ℃ C.. times.70 h) | Compression set percentage (150 ℃ C.. times.70 h) by conventional method | |
| Example 1 | ACM-120 | 72 | 210 | 10.7 | 20.4 | 30-50 |
| Example 2 | ACM-220 | 70 | 230 | 9.7 | 22.6 | 30-50 |
| Example 3 | ACM-320 | 67 | 200 | 8.7 | 19.7 | 30-50 |
| Comparative example 1 | ACM-120 | 67 | 240 | 10.3 | 30.3 | |
| Comparative example 2 | ACM-120 | 74 | 180 | 12.2 | 40.8 | |
| Comparative example 3 | ACM-120 | 69 | 210 | 10.1 | 26.4 |
As can be seen from Table 1, the carboxylic acid type acrylate rubber with low compression set prepared by the examples of the present invention has good hardness, elongation at break, high tensile strength and good compression set performance.
In conclusion, the carboxylic acid type acrylate rubber with low compression set and the preparation method thereof have the beneficial effects that the carboxylic acid type acrylate rubber prepared by the method has better thermal aging performance and compression set performance by the matched use of the fast extrusion carbon black and the precipitated white carbon black and the matched use of the No. 1 vulcanizing agent and the accelerator; adding silane coupling agent in the process of mixing the sizing material, wherein the carboxylic acid type acrylate rubber and the white carbon black are uniformly present in the system at the same time, and when adding, the two ends of the silane coupling agent can be combined with two objects simultaneously, thereby avoiding the condition that one end is combined and the other end is left vacant for a long time when the silane coupling agent pretreats the white carbon black, wherein, when the silane coupling agent is added for mixing, the temperature of the first mixed rubber is 50-70 ℃, each molecular chain has higher kinetic energy, this is beneficial to the fast and firm combination of the silane coupling agent and the rubber and the molecular chain of the white carbon black, greatly improves the combination strength of the molecular chain with a reticular structure formed during vulcanization, the rubber molecules have better compression resistance, the compression permanent deformation performance of the carboxylic acid type acrylate rubber is improved, and the finally prepared carboxylic acid type acrylate rubber with low compression permanent deformation has better comprehensive performance.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A carboxylic acid type acrylate rubber having a low compression set, characterized in that: the raw materials comprise the following components in parts by weight: 100 parts of carboxylic acid type acrylate rubber, 10-50 parts of fast extrusion carbon black, 10-50 parts of precipitated white carbon black, 1-5 parts of silane coupling agent, 1-3 parts of No. 1 vulcanizing agent, 2-6 parts of accelerator, 1-3 parts of processing aid and 2-5 parts of anti-aging agent, wherein the mass ratio of the fast extrusion carbon black to the precipitated white carbon black is 1:1, and the mass ratio of the No. 1 vulcanizing agent to the accelerator is 1: 2;
the preparation method of the carboxylic acid type acrylate rubber with low compression set comprises the following steps: adding the carboxylic acid type acrylate rubber, the fast extrusion carbon black, the precipitated white carbon black, the processing aid and the anti-aging agent into an open mill for primary mixing to prepare a first mixed rubber;
when the temperature of the first rubber compound is 50-70 ℃, adding the silane coupling agent to prepare a second rubber compound;
and then adding the No. 1 vulcanizing agent and an accelerator, and then carrying out vulcanization molding to obtain the low compression permanent deformation carboxylic acid type acrylate rubber.
2. The low compression set carboxylic acid type acrylate rubber according to claim 1, characterized in that: the silane coupling agent is selected from one of KH-550 and Si-69.
3. The low compression set carboxylic acid type acrylate rubber according to claim 1, characterized in that: the accelerator is DOTG.
4. The low compression set carboxylic acid type acrylate rubber according to claim 1, characterized in that: the processing aid is stearic acid.
5. The low compression set carboxylic acid type acrylate rubber according to claim 1, characterized in that: the anti-aging agent is TK-100.
6. The low compression set carboxylic acid type acrylate rubber according to claim 1, characterized in that: when the temperature of the first rubber compound is 65 ℃, the silane coupling agent is added.
7. The low compression set carboxylic acid type acrylate rubber according to claim 1, characterized in that: and adding the vulcanizing agent when the temperature of the second rubber compound is not higher than 50 ℃, and then carrying out vulcanization molding.
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| CN113999473A (en) * | 2021-11-30 | 2022-02-01 | 重庆长安汽车股份有限公司 | High-temperature-resistant acrylate rubber and preparation method thereof |
| CN114960241B (en) * | 2022-04-29 | 2023-10-13 | 江苏赛福天集团股份有限公司 | High-temperature-resistant anti-aging steel wire rope |
| CN114790320B (en) * | 2022-05-11 | 2023-04-07 | 山东海益橡胶科技有限公司 | Low-viscosity high-strength acrylate rubber compound and preparation method thereof |
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