CN112679868A - Rubber material for automobile pipeline and preparation method thereof - Google Patents
Rubber material for automobile pipeline and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the field of rubber, and discloses a rubber material for an automobile pipeline and a preparation method thereof, wherein the rubber material comprises the following raw materials in parts by weight: 36.29-38.06 parts of ethylene propylene diene monomer, 41.94-42.69 parts of reinforcing filler, 12.82-13.16 parts of plasticizer, 2.45-3.09 parts of activator, 0.04-0.11 part of sulfur, 2.10-2.21 parts of 1,31, 4-bis (tert-butylperoxyisopropyl) benzene, 1.03-1.05 parts of trimethylolpropane trimethacrylate, 0.54-0.57 part of N, N' -m-phenylene bismaleimide and 0.89-0.96 part of anti-aging agent; the preparation method of the rubber material comprises the following steps: (1) mixing ethylene propylene diene monomer with a reinforcing filler, a plasticizer, an activator and an anti-aging agent according to a specific sequence and a specific adding amount to obtain a master batch; (2) and (3) mixing the master batch with the rest raw materials to obtain the product. The rubber material prepared by taking the ethylene propylene diene monomer as the raw material can meet the requirement of the DBL6254 standard, can be used for preparing a cooling water pipe of an automobile, and widens the application range of the ethylene propylene diene monomer.
Description
Technical Field
The invention relates to the field of rubber, in particular to a rubber material for an automobile pipeline and a preparation method thereof.
Background
The rubber product for the automobile cooling water pipe is required to have high temperature resistance, low compression permanent deformation resistance and insulation resistance, and meet the DBL6254 standard requirement and the ELV instruction requirement. At present, ethylene propylene diene monomer has heat aging resistance, electrical insulation and ozone resistance, so that ethylene propylene diene monomer becomes one of the preferred materials for rubber products. However, in the prior art, when the ethylene propylene diene monomer is used for manufacturing rubber products for automobile cooling water pipe pipelines, the ethylene propylene diene monomer is difficult to meet the requirements of the DBL6254 standard on compression permanent deformation resistance and elongation at break change after thermal aging resistance, so that the ethylene propylene diene monomer material cannot be applied to the manufacturing of the automobile cooling water pipe pipelines. Therefore, a rubber material which meets the DBL6254 standard requirement and is prepared by taking ethylene propylene diene monomer as a raw material is needed.
Disclosure of Invention
The invention aims to provide a rubber material for automobile pipelines and a preparation method thereof, and aims to solve the problem that a rubber product prepared from ethylene propylene diene monomer serving as a raw material in the prior art is difficult to meet the DBL6254 standard.
In order to achieve the purpose, the invention adopts the following technical scheme: a rubber material for an automobile pipeline comprises the following raw materials in parts by weight: 36.29-38.06 parts of ethylene propylene diene monomer, 41.94-42.69 parts of reinforcing filler, 12.82-13.16 parts of plasticizer, 2.45-3.09 parts of activator, 0.04-0.11 part of sulfur, 2.10-2.21 parts of 1,31, 4-bis (tert-butylperoxyisopropyl) benzene, 1.03-1.05 parts of trimethylolpropane trimethacrylate, 0.54-0.57 part of N, N' -m-phenylene bismaleimide and 0.89-0.96 part of anti-aging agent.
The invention also provides a preparation method of the rubber material for the automobile pipeline, which comprises the following steps:
step one, controlling the working temperature of an internal mixer to be below 100 ℃, putting ethylene propylene diene monomer into the internal mixer, mixing for 8-12 s, sequentially putting 2/3 reinforcing filler, 2/3 plasticizer, activator and anti-aging agent, mixing for 35-45 s, sequentially putting the rest reinforcing filler and plasticizer, mixing for 55-65 s, cleaning, continuously mixing for 200-250 s, discharging rubber when the mixing temperature reaches 155-165 ℃, moving the rubber to an open rubber mixing machine, discharging the rubber, and cooling to room temperature to obtain master batch;
and step two, controlling the working temperature of the kneading machine to be below 70 ℃, putting the master batch, sulfur, 1,31, 4-bis (tert-butyl peroxy isopropyl) benzene, trimethylolpropane trimethacrylate and N, N' -m-phenylene bismaleimide into the kneading machine together for mixing for 55-65 s, continuously mixing for 200-240 s after turning over and cleaning, discharging the rubber and transferring to an open type rubber mixing machine for sheet discharging, cooling and standing to obtain the product.
Preferably, as an improvement, the reinforcing filler is 19.21-19.42 parts of fast extrusion furnace black, 11.65-12.10 parts of semi-reinforcing furnace black and 10.87-11.38 parts of mica.
Preferably, as an improvement, the plasticizer is petroleum wax.
Preferably, as an improvement, the activator is 1.55-2.13 parts of zinc oxide, 0.16-0.21 part of stearic acid and 0.74-0.75 part of polyethylene glycol.
Preferably, as an improvement, the anti-aging agent is 0.54-0.57 part of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 0.35-0.39 part of 2-mercaptobenzimidazole.
Preferably, as an improvement, in the step one, the rotation speed of mixing is 35-38 rpm; in the second step, the rotation speed of the mixing is 25-28 rpm.
The principle and the advantages of the scheme are as follows: in the scheme, the ethylene propylene diene monomer with medium ethylene content (the ethylene mass content is 55-65%) is adopted as the formula of the main raw material, so that the prepared product has both high and low temperature resistance and insulation performance, in addition, sulfur, 1,31, 4-bis (tert-butyl peroxy isopropyl) benzene, trimethylolpropane trimethacrylate and N, N' -m-phenylene bismaleimide are used as vulcanizing agents to improve the heat resistance and the compression permanent deformation resistance of the vulcanized rubber, fast extrusion furnace black, semi-reinforced furnace black and mica are used as reinforcing fillers to improve the hardness and the insulating property of the vulcanized rubber, 2, 4-trimethyl-1, 2-dihydroquinoline polymer and 2-mercaptobenzimidazole are used as anti-aging agents to improve the heat resistance of the vulcanized rubber, and paraffin oil with a high flash point is used as a plasticizer to improve the heat resistance of the vulcanized rubber; and a unique preparation method is matched, and the specific adding sequence, adding amount, mixing time, mixing temperature and mixing rotating speed are adopted, so that the compression permanent deformation resistance and the elongation at break change after thermal aging resistance of the prepared product meet the requirements of the DBL6254 standard.
Detailed Description
The following is further detailed by way of specific embodiments:
example 1
A rubber material for an automobile pipeline comprises the following raw materials in parts by weight: 37.13 parts of ethylene propylene diene monomer, 42.33 parts of reinforcing filler, 13.00 parts of plasticizer, 2.79 parts of activator, 0.07 part of sulfur, 2.15 parts of 1,31, 4-bis (tert-butyl peroxy isopropyl) benzene, 1.04 parts of trimethylolpropane trimethacrylate, 0.56 part of N, N' -m-phenylene bismaleimide and 0.93 part of anti-aging agent. Wherein the reinforcing filler comprises 19.31 parts of fast extrusion furnace black, 11.88 parts of semi-reinforcing furnace black and 11.14 parts of mica; the plasticizer is petroleum wax; the active agent is zinc oxide 1.86 parts, stearic acid 0.19 parts and polyethylene glycol 0.74 parts; the anti-aging agent comprises 0.56 part of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 0.37 part of 2-mercaptobenzimidazole.
A preparation method of a rubber material for an automobile pipeline comprises the following steps;
step one, introducing water into an internal mixer for cooling, controlling the temperature of a working chamber of the internal mixer to be below 100 ℃, adjusting the rotating speed to be 35rpm, adjusting the top plug pressure to be 0.45MPa, putting a rubber raw material, namely ethylene propylene diene monomer rubber, in the formula into the internal mixer, and mixing for 10 s; adjusting the rotation speed to 38rpm, sequentially adding 2/3 reinforcing filler, 2/3 plasticizer, activator and antioxidant into an internal mixer, mixing for 40s, then adding the rest reinforcing filler and plasticizer, and mixing for 60 s; cleaning, continuously mixing for 200s until the glue temperature reaches 160 ℃, then discharging the glue, moving to an open rubber mixing machine for sheet discharging, and cooling to room temperature to obtain master batch;
and step two, cooling the kneading machine by introducing water, controlling the temperature of a working chamber of the kneading machine to be below 70 ℃, adjusting the rotating speed to be 25rpm, adjusting the top plug pressure to be 0.70MPa, putting the master batch prepared in the step one, sulfur, 1,31, 4-bis (tert-butyl peroxy isopropyl) benzene, trimethylolpropane trimethacrylate and N, N' -m-phenylene bismaleimide in the formula into the kneading machine together, mixing for 60s, then turning over and cleaning, continuously mixing until the glue temperature reaches 90 ℃, discharging the glue after the mixing time reaches 200s, then moving the glue to an open type rubber mixing machine, discharging the sheets, cooling, and standing for 8-24 h to obtain the product.
Example 2
This embodiment is different from embodiment 1 in that: the weight parts of the raw materials in this embodiment are different from those in embodiment 1, and specifically, in this embodiment, a rubber material for an automobile pipeline includes the following raw materials in parts by weight: 36.29 parts of ethylene propylene diene monomer, 42.69 parts of reinforcing filler, 13.16 parts of plasticizer, 3.09 parts of activator, 0.11 part of sulfur, 2.10 parts of 1,31, 4-bis (tert-butyl peroxy isopropyl) benzene, 1.03 parts of trimethylolpropane trimethacrylate, 0.57 part of N, N' -m-phenylene bismaleimide and 0.96 part of anti-aging agent. Wherein the reinforcing filler comprises 19.21 parts of fast extrusion furnace black, 12.10 parts of semi-reinforcing furnace black and 11.38 parts of mica; the plasticizer is petroleum wax; the active agent is 2.13 parts of zinc oxide, 0.21 part of stearic acid and 0.75 part of polyethylene glycol; the anti-aging agent comprises 0.57 part of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 0.39 part of 2-mercaptobenzimidazole.
Example 3
This embodiment is different from embodiment 1 in that: the weight parts of the raw materials in this embodiment are different from those in embodiment 1, and specifically, in this embodiment, a rubber material for an automobile pipeline includes the following raw materials in parts by weight: 38.06 parts of ethylene propylene diene monomer, 41.94 parts of reinforcing filler, 12.82 parts of plasticizer, 2.45 parts of activator, 0.04 part of sulfur, 2.21 parts of 1,31, 4-bis (tert-butylperoxyisopropyl) benzene, 1.05 parts of trimethylolpropane trimethacrylate, 0.54 part of N, N' -m-phenylene bismaleimide and 0.89 part of anti-aging agent. Wherein the reinforcing filler comprises 19.42 parts of fast extrusion furnace black, 11.65 parts of semi-reinforcing furnace black and 10.87 parts of mica; the plasticizer is petroleum wax; the active agent is 1.55 parts of zinc oxide, 0.16 part of stearic acid and 0.74 part of polyethylene glycol; the anti-aging agent comprises 0.54 part of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 0.35 part of 2-mercaptobenzimidazole.
Comparative example
The comparative example provides a rubber product taking ethylene propylene diene monomer as a raw material in the prior art, which comprises the following raw materials in parts by weight: 35.41 parts of ethylene propylene diene monomer, 23.73 parts of fast extrusion furnace black, 23.02 parts of mica, 12.75 parts of paraffin oil, 1.77 parts of zinc oxide, 0.18 part of stearic acid, 0.71 part of polyethylene glycol, 0.07 part of sulfur, 1.06 parts of dicumyl peroxide, 0.42 part of triallyl isocyanurate, 0.53 part of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 0.35 part of 2-mercaptobenzimidazole. Wherein, the fast extrusion furnace black and mica are used as reinforcing fillers, paraffin oil is used as a plasticizer, zinc oxide, stearic acid and polyethylene glycol are used as active agents, sulfur, dicumyl peroxide and triallyl isocyanurate are used as vulcanizing agents, and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 2-mercaptobenzimidazole are used as anti-aging agents.
The method for preparing the rubber product in the comparative example comprises the following steps:
step one, introducing water into an internal mixer for cooling, controlling the temperature of a working chamber of the internal mixer to be below 100 ℃, adjusting the rotating speed to be 35rpm, adjusting the top plug pressure to be 0.45MPa, putting a rubber raw material, namely ethylene propylene diene monomer rubber, in the formula into the internal mixer, and mixing for 10 s; adjusting the rotation speed to 40rpm, sequentially adding the reinforcing filler, the plasticizer, the activator and the anti-aging agent into an internal mixer, and mixing for 100 s; cleaning, continuously mixing until the glue temperature reaches 150 ℃, mixing for 200s, then discharging the glue, moving to an open rubber mixing machine, discharging the sheet, and cooling to room temperature to obtain master batch;
and step two, introducing water into the kneading machine for cooling, controlling the temperature of a working chamber of the kneading machine to be below 70 ℃, adjusting the rotating speed to be 25rpm, adjusting the top plug pressure to be 0.70MPa, putting the master batch prepared in the step one and a vulcanizing agent in the formula into the kneading machine, mixing for 60s, then turning over and cleaning the rubber, continuously mixing until the rubber temperature reaches 100 ℃, discharging the rubber after the mixing time reaches 200s, moving the rubber to an open type rubber mixing machine for discharging, cooling and standing for 8-24 h to obtain the product.
The products prepared in examples 1 to 3 and the product prepared in the comparative example were subjected to an index test against the DBL6254 standard, and the test results are shown in table 1.
TABLE 1
In Table 1, test method ISO 868 refers to a test conducted in accordance with the indentation hardness test using a durometer for plastics and hard rubbers, ISO 37 refers to a test conducted in accordance with the measurement Standard for vulcanized or thermoplastic rubbers and tensile stress-Strain characteristics, ISO 34-1 refers to a test conducted in accordance with the measurement of the tear Strength of vulcanized or thermoplastic rubbers, ISO 188 refers to a test conducted in accordance with the accelerated aging and Heat resistance test for vulcanized or thermoplastic rubbers, and ISO 815-1B refers to a test conducted in accordance with the measurement of the compression set of vulcanized or thermoplastic rubbers.
As can be seen from Table 1, the products prepared in examples 1 to 3 had elongation at break changes of-46.1%, -48.0%, -47.1%, respectively, and met the DBL6254 standard, and had compression set resistances of 36.6, 37.5, and 36.4, respectively, and also met the DBL6254 standard, and the other indices (in Table 1) were all acceptable. However, the product prepared in the comparative example, although the other indexes (in table 1) of the product prepared in the comparative example were acceptable, had a change in elongation at break of-56.1% and a compression set resistance of 71.0, both of which did not meet the DBL6254 standard.
Therefore, in the invention, because the sulfur, the 1,31, 4-bis (tert-butylperoxyisopropyl) benzene, the trimethylolpropane trimethacrylate and the N, N' -m-phenylene bismaleimide are adopted as vulcanizing agents, and a unique preparation method is matched to limit the adding sequence and adding amount of raw materials and limit the mixing rotating speed, mixing time and mixing temperature in different stages, the compression permanent deformation resistance of the rubber material produced and prepared by the invention is improved, the rubber material meets the DBL6254 standard, meanwhile, the elongation at break change after thermal aging resistance meets the DBL6254 standard, and other indexes meet the DBL6254 standard, so that the rubber material prepared by taking the ethylene propylene diene monomer as the raw material can be used for preparing an automobile cooling water pipe, and the application range of the ethylene propylene diene monomer is widened.
The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. A rubber material for automobile pipelines is characterized in that: the composite material comprises the following raw materials in parts by weight: 36.29-38.06 parts of ethylene propylene diene monomer, 41.94-42.69 parts of reinforcing filler, 12.82-13.16 parts of plasticizer, 2.45-3.09 parts of activator, 0.04-0.11 part of sulfur, 2.10-2.21 parts of 1,31, 4-bis (tert-butylperoxyisopropyl) benzene, 1.03-1.05 parts of trimethylolpropane trimethacrylate, 0.54-0.57 part of N, N' -m-phenylene bismaleimide and 0.89-0.96 part of anti-aging agent.
2. The rubber material for automobile pipes according to claim 1, wherein: the reinforcing filler is 19.21-19.42 parts of fast extrusion furnace black, 11.65-12.10 parts of semi-reinforcing furnace black and 10.87-11.38 parts of mica.
3. The rubber material for automobile pipes according to claim 2, wherein: the plasticizer is petroleum wax.
4. The rubber material for automobile pipes according to claim 3, wherein: the activator is 1.55-2.13 parts of zinc oxide, 0.16-0.21 part of stearic acid and 0.74-0.75 part of polyethylene glycol.
5. The rubber material for automobile pipes according to claim 4, wherein: the anti-aging agent comprises 0.54-0.57 part of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer and 0.35-0.39 part of 2-mercaptobenzimidazole.
6. A preparation method of a rubber material for an automobile pipeline is characterized by comprising the following steps: the method comprises the following steps:
step one, controlling the working temperature of an internal mixer to be below 100 ℃, putting ethylene propylene diene monomer into the internal mixer, mixing for 8-12 s, sequentially putting 2/3 reinforcing filler, 2/3 plasticizer, activator and anti-aging agent, mixing for 35-45 s, sequentially putting the rest reinforcing filler and plasticizer, mixing for 55-65 s, cleaning, continuously mixing for 200-250 s, discharging rubber when the mixing temperature reaches 155-165 ℃, moving the rubber to an open rubber mixing machine, discharging the rubber, and cooling to room temperature to obtain master batch;
and step two, controlling the working temperature of the kneading machine to be below 70 ℃, putting the master batch, sulfur, 1,31, 4-bis (tert-butyl peroxy isopropyl) benzene, trimethylolpropane trimethacrylate and N, N' -m-phenylene bismaleimide into the kneading machine together for mixing for 55-65 s, continuously mixing for 200-240 s after turning over and cleaning, discharging the rubber and transferring to an open type rubber mixing machine for sheet discharging, cooling and standing to obtain the product.
7. The method for preparing a rubber material for automobile pipes according to claim 6, wherein: in the first step, the mixing speed is 35-38 rpm; in the second step, the rotation speed of the mixing is 25-28 rpm.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857944A (en) * | 2017-11-03 | 2018-03-30 | 上海天普汽车零部件有限公司 | A kind of automobile using urea conducting tube elastomeric material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857944A (en) * | 2017-11-03 | 2018-03-30 | 上海天普汽车零部件有限公司 | A kind of automobile using urea conducting tube elastomeric material and preparation method thereof |
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