CN112250953A - High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof - Google Patents
High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof Download PDFInfo
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- CN112250953A CN112250953A CN202011097775.7A CN202011097775A CN112250953A CN 112250953 A CN112250953 A CN 112250953A CN 202011097775 A CN202011097775 A CN 202011097775A CN 112250953 A CN112250953 A CN 112250953A
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- 229920002943 EPDM rubber Polymers 0.000 title claims abstract description 55
- 239000003566 sealing material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 26
- 229920001971 elastomer Polymers 0.000 claims abstract description 26
- 239000005060 rubber Substances 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 19
- 238000004132 cross linking Methods 0.000 claims abstract description 14
- 239000004014 plasticizer Substances 0.000 claims abstract description 14
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 13
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 13
- 239000006229 carbon black Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000004898 kneading Methods 0.000 claims abstract description 6
- 239000012190 activator Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 10
- 239000013543 active substance Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 3
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical group C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- -1 ethylene, propylene Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
-
- 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
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Landscapes
- 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)
Abstract
The invention discloses a high-temperature resistant EPDM (ethylene-propylene-diene monomer) sealing material and a preparation method thereof, relates to the technical field of sealing materials, and aims at solving the problems that the existing EPDM sealing material is low in high-temperature resistance and influences the application range of the existing EPDM sealing material, the following scheme is proposed, and the scheme comprises the following steps: the EPDM, the butyl rubber, the softening plasticizer, the crosslinking assistant, the carbon black and the activator are put into an internal mixer for mixing for 90-120s, then the hammer is lifted and cleaned, then the hammer is pressed and mixed for 90-1200s, the hammer is lifted and cleaned again, the temperature is 140-; adding nano calcium carbonate into the rubber compound, kneading the nano calcium carbonate, and putting the nano calcium carbonate into an internal mixer after cooling. The EPDM prepared by the invention has higher heat resistance and high temperature resistance, and the application range of the EPDM is enlarged.
Description
Technical Field
The invention relates to the technical field of sealing materials, in particular to a high-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and a preparation method thereof.
Background
Ethylene propylene diene monomer is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, is one of ethylene propylene rubbers, is represented by EPDM (ethylene propylene diene monomer), has excellent aging resistance such as ozone resistance, heat resistance, weather resistance and the like because the main chain of the ethylene propylene diene monomer consists of chemically stable saturated hydrocarbon and only contains unsaturated double bonds in the side chain, can be widely used in the fields of automobile parts, waterproof materials for buildings, wire and cable sheaths, heat-resistant rubber tubes, adhesive tapes, automobile sealing elements and the like, and has the following main performance advantages compared with other common general rubbers or special rubbers: (1) the cost performance is high, the raw rubber density is only 0.86-0.90 g/cm3, and the rubber is common rubber with the lightest raw rubber density; and can be filled in large quantity to reduce the cost of the sizing material; (2) excellent aging resistance, weather resistance, ozone resistance, sunlight resistance, heat resistance, water resistance, steam resistance, ultraviolet ray resistance, radiation resistance and other aging resistance, and the EPDM can play a role of a high molecular antioxidant or an anti-aging agent when used together with other unsaturated diene rubbers such as NR, SBR, BR, NBR, CR and the like; (3) excellent chemical resistance, acid resistance, alkali resistance, detergents, animal and vegetable oils, alcohols, ketones, and the like; excellent water resistance, superheated water resistance and water vapor resistance; polar oil resistance; (4) excellent insulating property, volume resistivity of 1016Q cm, breakdown voltage of 30-40 MV/m, and dielectric constant (1kHz, 20 ℃) of 2.27; (5) the application temperature range is wide, the lowest use temperature is-40 to-60 ℃, and the product can be used at 130 ℃ for a long time.
Although the EPDM rubber has relatively good performance under some limit conditions, the existing EPDM rubber cannot adapt to a higher-temperature use environment, so that the use range of the EPDM rubber is limited, and therefore a high-temperature-resistant EPDM sealing material and a preparation method thereof are provided.
Disclosure of Invention
The invention aims to solve the defects that the EPDM sealing material in the prior art has low high-temperature resistance and influences the application range of the EPDM sealing material, and provides a high-temperature-resistant EPDM sealing material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-temperature resistant EPDM sealing material comprises the following raw materials in parts by weight:
preferably, the high-temperature resistant EPDM sealing material comprises the following raw materials in parts by weight: 90 parts of EPDM, 20 parts of butyl rubber, 3 parts of a crosslinking assistant, 20 parts of a softening plasticizer, 35 parts of carbon black, 12 parts of an active agent, 9 parts of a vulcanizing agent, 15 parts of nano calcium and 15 parts of nano magnesium oxide.
Preferably, the plasticizer is a liquid material of ethylene propylene rubber.
Preferably, the crosslinking coagent is triallyl isocyanurate.
A preparation method of a high-temperature resistant EPDM sealing material comprises the following steps:
s1: the EPDM, the butyl rubber, the softening plasticizer, the crosslinking assistant, the carbon black and the activator are put into an internal mixer for mixing for 90-120s, then the hammer is lifted and cleaned, then the hammer is pressed and mixed for 90-120s, the hammer is lifted and cleaned again, the temperature is 140-;
s2: adding nano calcium carbonate into the rubber compound, kneading the nano calcium carbonate, putting the mixture into an internal mixer after cooling the mixture, and simultaneously adding nano magnesium oxide for fully mixing;
s3: and adding a vulcanizing agent into the fully mixed rubber compound, putting the fully mixed rubber compound into the internal mixer again for mixing for 30-40s, and discharging to prepare the high-temperature-resistant EPDM sealing material.
The invention has the beneficial effects that: according to the high-temperature-resistant EPDM sealing material and the preparation method thereof, the butyl rubber is prepared, the butyl rubber and the EPDM are melted and blended uniformly at high temperature, and the softening plasticizer, the crosslinking assistant, the carbon black, the activator and the vulcanizing agent are arranged, so that the EPDM composite material can be used for a long time in a high-temperature environment, the high-temperature resistance of the EPDM material is improved, and the preparation method of the EPDM has the advantages of simple process, easily-controlled conditions, low requirement on equipment and suitability for popularization and use.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
Preparing the following preparation raw materials in parts by weight: 80 parts of EPDM, 10 parts of butyl rubber, 2 parts of a crosslinking assistant, 10 parts of a softening plasticizer, 20 parts of carbon black, 8 parts of an active agent, 6 parts of a vulcanizing agent, 10 parts of nano calcium and 10 parts of nano magnesium oxide, then putting the EPDM, the butyl rubber, the softening plasticizer, the crosslinking assistant, the carbon black and the active agent into an internal mixer for mixing, wherein after 100s, the internal mixer is cleaned by lifting a hammer, then is mixed by pressing the hammer for 100s, is cleaned by lifting the hammer again, has the temperature of 145 ℃, is then mixed by pressing the hammer for 70s, is unloaded at the temperature of 160 ℃, is discharged from a cutting machine, and is prepared into rubber compound; adding nano calcium carbonate into the rubber compound, kneading the nano calcium carbonate, putting the mixture into an internal mixer after cooling the mixture, and simultaneously adding nano magnesium oxide for fully mixing; and adding a vulcanizing agent into the fully-mixed rubber compound, putting the fully-mixed rubber compound into the internal mixer again for mixing for 35 seconds, and discharging to prepare the high-temperature-resistant EPDM sealing material.
Example two
Preparing the following preparation raw materials in parts by weight: 90 parts of EPDM, 20 parts of butyl rubber, 3 parts of a crosslinking assistant, 20 parts of a softening plasticizer, 35 parts of carbon black, 12 parts of an active agent, 9 parts of a vulcanizing agent, 15 parts of nano calcium and 15 parts of nano magnesium oxide, then putting the EPDM, the butyl rubber, the softening plasticizer, the crosslinking assistant, the carbon black and the active agent into an internal mixer for mixing, wherein after 100s, the hammer is lifted for cleaning, then the hammer is pressed for mixing for 100s, the hammer is lifted for cleaning again, the temperature is 145 ℃, then the hammer is pressed for mixing for 70s, the discharging is carried out, the temperature is 160 ℃, the sheet is discharged from a cutting machine, and the rubber compound is; adding nano calcium carbonate into the rubber compound, kneading the nano calcium carbonate, putting the mixture into an internal mixer after cooling the mixture, and simultaneously adding nano magnesium oxide for fully mixing; and adding a vulcanizing agent into the fully-mixed rubber compound, putting the fully-mixed rubber compound into the internal mixer again for mixing for 35 seconds, and discharging to prepare the high-temperature-resistant EPDM sealing material.
EXAMPLE III
Preparing the following preparation raw materials in parts by weight: 100 parts of EPDM, 30 parts of butyl rubber, 4 parts of a crosslinking assistant, 30 parts of a softening plasticizer, 50 parts of carbon black, 16 parts of an active agent, 12 parts of a vulcanizing agent, 20 parts of nano calcium and 20 parts of nano magnesium oxide, and then putting the EPDM, the butyl rubber, the softening plasticizer, the crosslinking assistant, the carbon black and the active agent into an internal mixer for mixing, wherein after 100s, the hammer is lifted for cleaning, then the hammer is pressed for mixing for 100s, the hammer is lifted for cleaning again, the temperature is 145 ℃, then the hammer is pressed for mixing for 70s, the material is discharged at the temperature of 160 ℃, and the mixture is discharged from a cutting machine to prepare the rubber compound; adding nano calcium carbonate into the rubber compound, kneading the nano calcium carbonate, putting the mixture into an internal mixer after cooling the mixture, and simultaneously adding nano magnesium oxide for fully mixing; and adding a vulcanizing agent into the fully-mixed rubber compound, putting the fully-mixed rubber compound into the internal mixer again for mixing for 35 seconds, and discharging to prepare the high-temperature-resistant EPDM sealing material.
The EPDM sealing materials produced in the above three examples were heated in a heating furnace, and the temperature at the time of melting was observed, to obtain the following data (the lower the temperature at the time of melting, the worse the high temperature resistance thereof):
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The high-temperature-resistant EPDM sealing material is characterized by comprising the following raw materials in parts by weight:
2. the high temperature resistant EPDM sealing material of claim 1, wherein the high temperature resistant EPDM sealing material comprises the following raw materials in parts by weight: 90 parts of EPDM, 20 parts of butyl rubber, 3 parts of a crosslinking assistant, 20 parts of a softening plasticizer, 35 parts of carbon black, 12 parts of an active agent, 9 parts of a vulcanizing agent, 15 parts of nano calcium and 15 parts of nano magnesium oxide.
3. The high temperature EPDM sealing material of claim 1, wherein said plasticizer is a liquid ethylene propylene rubber.
4. The high temperature EPDM sealing material of claim 1 wherein said crosslinking coagent is triallyl isocyanurate.
5. The preparation method of the high-temperature-resistant EPDM sealing material is characterized by comprising the following steps:
s1: the EPDM, the butyl rubber, the softening plasticizer, the crosslinking assistant, the carbon black and the activator are put into an internal mixer for mixing for 90-120s, then the hammer is lifted and cleaned, then the hammer is pressed and mixed for 90-120s, the hammer is lifted and cleaned again, the temperature is 140-;
s2: adding nano calcium carbonate into the rubber compound, kneading the nano calcium carbonate, putting the mixture into an internal mixer after cooling the mixture, and simultaneously adding nano magnesium oxide for fully mixing;
s3: and adding a vulcanizing agent into the fully mixed rubber compound, putting the fully mixed rubber compound into the internal mixer again for mixing for 30-40s, and discharging to prepare the high-temperature-resistant EPDM sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097775.7A CN112250953A (en) | 2020-10-14 | 2020-10-14 | High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097775.7A CN112250953A (en) | 2020-10-14 | 2020-10-14 | High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112250953A true CN112250953A (en) | 2021-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011097775.7A Pending CN112250953A (en) | 2020-10-14 | 2020-10-14 | High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112250953A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09106932A (en) * | 1995-10-11 | 1997-04-22 | Nippon Chemicon Corp | Sealing rubber for electrolytic capacitor |
| US20060264575A1 (en) * | 2005-05-23 | 2006-11-23 | Adam Gronowski | Peroxide cured butyl compositions having improved hardness and compression set |
| CN108329602A (en) * | 2017-01-13 | 2018-07-27 | 杭州星庐科技有限公司 | Rubber composition and processing method, and apply its sealing element and production method |
| CN109370067A (en) * | 2018-11-07 | 2019-02-22 | 太仓冠联高分子材料有限公司 | A kind of high durable braking sealing EPDM sizing material and preparation method thereof of high temperature resistant |
| CN111117083A (en) * | 2020-01-10 | 2020-05-08 | 山东海益橡胶科技有限公司 | Encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer and preparation method thereof |
| JP2020117713A (en) * | 2015-11-30 | 2020-08-06 | 株式会社ブリヂストン | Rubber composition |
-
2020
- 2020-10-14 CN CN202011097775.7A patent/CN112250953A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09106932A (en) * | 1995-10-11 | 1997-04-22 | Nippon Chemicon Corp | Sealing rubber for electrolytic capacitor |
| US20060264575A1 (en) * | 2005-05-23 | 2006-11-23 | Adam Gronowski | Peroxide cured butyl compositions having improved hardness and compression set |
| JP2020117713A (en) * | 2015-11-30 | 2020-08-06 | 株式会社ブリヂストン | Rubber composition |
| CN108329602A (en) * | 2017-01-13 | 2018-07-27 | 杭州星庐科技有限公司 | Rubber composition and processing method, and apply its sealing element and production method |
| CN109370067A (en) * | 2018-11-07 | 2019-02-22 | 太仓冠联高分子材料有限公司 | A kind of high durable braking sealing EPDM sizing material and preparation method thereof of high temperature resistant |
| CN111117083A (en) * | 2020-01-10 | 2020-05-08 | 山东海益橡胶科技有限公司 | Encapsulating sleeve prepared by compounding butyl rubber and ethylene propylene diene monomer and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 宋洁 等: "车用耐高温三元乙丙橡胶密封胶垫的研制" * |
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Application publication date: 20210122 |