What chemicals are resistant to EPDM?
Rubber Chemical Resistance This tool can be used to view the resistance of thousands of chemicals with different rubbers such as Viton and Nitrile. EPDM is extremely resistant to many chemicals such as Acetaldehyde, Acetamide, and Ammonia.
Is EPDM rubber as good as natural rubber?
Most elastomers cannot hold a candle to natural rubber in such categories. While EPDM does have decent physical properties, they are not on the same level as natural rubber. However, EPDM rubber can brag about its resistances to UV and ozone, a quality that is natural rubber’s most glaring weakness.
What are the physical properties of EPDM?
It has an extremely low compression set, high tensile strength, incredible elongation, and a high resistance to abrasions. Most elastomers cannot hold a candle to natural rubber in such categories. While EPDM does have decent physical properties, they are not on the same level as natural rubber.
What is the difference between EPDM and SBR rubber?
EPDM vs. SBR: Ethylene propylene rubber performs better than Styrene-Butadiene rubber (SBR) in nearly every way. EPDM has a lower compression set, a higher tensile strength, a better resistance to heat aging, and high weathering resistance. However, an SBR product will have a much better resistance to abrasions than an EPDM product would.
Is EPDM hose oil resistant?
High-temperature tolerance— between 150°C (302°F) and 204°C (400°F) in water or steam)—makes EPDM an excellent steam hose, and it is also a great choice for conveying low and high pH fluid. However, EPDM is not oil resistant—thus unsuitable for fuel transfer hose—and can also be very costly.
What type of rubber is oil resistant?
NitrileNitrile (Buna N) – This type of rubber offers very good oil resistance and can be used for a good variety of refined oils. Nitrile is the most commonly used material for sealing oil.
What is EPDM resistant to?
EPDM has poor resistance to oil, gasoline and hydrocarbon solvents. The physical properties of NBR meet the requirements of EN 681:1. NBR is used in specific applications for ef- fluent contaminated with hydrocarbons, oils, fats and greases.
What is EPDM not compatible with?
You should also never use EPDM with oils, greases, hydrocarbon fuels, concentrated acids or halogenated solvents.
Does rubber react with oil?
The tire rubbers (natural rubber, SBR), when placed in oil, absorb the fluid slowly until either the oil is all gone or the rubber has disintegrated. They never reach equilibrium. The so-called oil-resistant elastomers absorb some oil, especially at elevated temperature, but only a limited amount.
Does rubber dissolve in oil?
Oils, Greases and Gasoline Petroleum-based hydraulic oils and greases contain a variety of long chain hydrocarbon components. These chemicals have extremely adverse effects on EPDM rubber seals and can actually dissolve the material.
Is EPDM compatible with mineral oil?
EPDM is not resistant to mineral oils Mineral oils and lubricants, as well as organic oils and adipose, causes severe swelling.
What is EPDM good for?
Industrial applications use EPDM for its electrically insulating and waterproof properties, as well as its resilience and flexibility. EPDM can be found in parts such as water system O-rings, hoses, and gaskets, as well as in electrical insulators and connectors for wire and cable.
What is the difference between Viton and EPDM?
Viton® rubber is a fluoro elastomer, whereas epdm rubber is ethylene-propylene-diene-monomer. The primary differences between Viton® and EPDM is in their chemical resistance and temperature ranges. Both have different properties and applications for general industrial use.
Is EPDM a silicone?
Both EPDM and silicone are synthetic rubbers, but their key differences are in the width of their applications: silicone is better for more general uses, while EPDM is geared toward more specific purposes. Both rubbers have electricity, weather, ozone, and UV resistance, as well as good bonding with metal.
Is EPDM a polyurethane?
Both materials are well suited for use in the -23 to 66°C range. Polyurethane has an advantage in lower temperatures and EPDM has an advantage in higher temperatures....EPDM (EP, EPR, Ethylene-Propylene Rubber)General InformationShort NamePolyurethane: PolyurethaneEPDM: EPDM3 more rows
What is the difference between PTFE and EPDM?
Reduced fouling and cleaning frequency: PTFE membranes can help slow the rate of membrane fouling, often by a factor of five to 10 when compared with EPDM membranes. This advantage occurs because of the nonstick properties of PTFE, which make it hard for organic matter to adhere to and accumulate on the PTFE surface.
Is Nitrile rubber oil resistant?
nitrile rubber (NBR), also called nitrile-butadiene rubber, an oil-resistant synthetic rubber produced from a copolymer of acrylonitrile and butadiene. Its main applications are in fuel hoses, gaskets, rollers, and other products in which oil resistance is required.
Is silicone rubber oil resistant?
Silicone rubber has outstanding resistance to oil at high temperatures. Among common organic rubbers, nitrile rubber and chloroprene rubber have somewhat higher oil resistance at temperatures below 100°C, but at higher temperatures silicone rubber is superior.
Is butyl rubber oil resistant?
Butyl is not recommended for use with petroleum oils, fluids, or solvents. Butyl has poor resistance to aromatic hydrocarbons (e.g., Benzol, Toloul), aliphatic hydrocarbons (e.g., kerosene, turpentine), coal, tar, and diester-based lubricants. Cold weather properties for butyl rubber are fair.
Is neoprene rubber oil resistant?
Neoprene offers moderate resistance to oils and petroleum products, but provides significantly greater resistance to sunlight, ozone, and weather.
What are the properties of EPDM?
Outstanding among these are a high resistance to heat and a resistance to degradation by either oxygen or ozone. Two short-comings which have limited the use of this material are the relatively long cure time and, in particular, a relatively poor resistance to oil at elevated temperatures; these drawbacks have prevented this material from being used in seal applications such as those found in automotive transmissions and differentials. Often, neoprene is the only acceptable material for these applications and occasional supply problems have generated an interest in developing substitute materials.
Why is radiation used to cure EPDM?
However, it is apparent that when the acrylic cross-linking monomer is blended into the elastomer, the two materials are relatively immiscible and the filler, that is typically the carbon black, serves to carry the acrylic cross-linking monomer throughout the elastomer as the composition is blended on the two-roll mill. Furthermore, once the radiation begins, spectrographic data indicate that the acrylic cross-linking monomer has a tendency to first polymerize and form an acrylic homopolymer which has a relatively low molecular weight; then as the radiation continues, the acrylic oligimers then begin to react with and cross-link the EPDM polymer matrix. This initial homopolymerization process can create unusual cross-linking species having many chemically active points of unsaturation. For example, if two of the TMPT molecules react and form a dimer, this material will have 4 points of ethylenic unsaturation; similarly a trimer will have 5 points of unsaturation and so on. Apparently, this type of cross-linking species promotes the oil resistance of the final radiation cured product.
How much volume swell is a neoprene elastomer?
An elastomer prepared in accordance with the practice of this preferred embodiment exhibits a volume swell of about 100 percent when exposed to ASTM No. 3 Oil for 70 hours at 150° C. as measured in accordance with ASTM Test D-471-68. Comparatively, typical sulfur-cured EPDM elastomers show a volume swell of more than 200 percent when tested in this manner. Neoprene exhibits a swell of only from 75 to 85 percent.
How to measure oil resistance?
To measure the oil resistance of this elastomeric composition, it was immersed in ASTM No. 3 Oil for a period of 70 hours at a temperature of 150° C. The swelling was then measured in accordance with D-471-68 and reported as percent swell of the original volume. This data was then compared with the percent swell of sulfur cured EPDM elastomeric compositions. It should be noted, however, that in making this comparison, it is necessary to also corrolate the extent of cure as measured by the equilibrium swell ratio in toluene. This is necessary since an elastomeric composition having a high cross-link density will exhibit more oil resistance than a material with a lower cross-link density. However, when sulfur cured and radiation cured systems having essentially the same state of cure, i.e. equilibrium volume swell fraction, v2, are evaluated in terms of their oil resistance, the radiation cured samples are far superior. The data from this example is reported in the first line of Table I. For comparative purposes, sulfur cured EPDM samples having various degrees of cure are listed on the right-hand side of Table I.
How to determine the effect of carbon black and extender oil?
To determine the effect of the loading of carbon black and extender oil, a series of experiments were run using compositions containing various amounts of each of these additives. Compositions having this same loading were then cured by radiation and by the conventional sulfur curing process. In the radiation cured samples the monomer concentration was maintained at a level of 15 parts by weight of monomer per 100 parts by weight of elastomer plus extender oil. This was done to maintain a relatively constant cure rate. The compositions were prepared and radiated in accordance with the procedures described in Example I and the data is recorded in Table II.
What is C08K5/103?
C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
Is EPDM oil resistant?
In accordance with this invention, a modified radiation cured EPDM elastomer having improved oil-resistant properties is produced. This is achieved by the addition of a polymerizable acrylic cross-linking monomer having two or more points of ethylenic unsaturation to the EPDM composition prior to the radiation curing process. This technique unexpectedly produces an oil-resistant elastomer from a base material typically known for its poor oil-resistant properties.
Why use EPDM over silicone?
So, why would you choose an EPDM product over a silicone one? Silicone rubber is actually very easy to tear and has one of the weakest resistances to abrasive substances and conditions. On the other hand, EPDM is a UV-resistant rub ber that has a great tensile strength and is moderately resistant to abrasions.
What is EPDM rubber?
What is EPDM Rubber Then? The answer eventually came in the form of ethylene propylene rubber, properly known in chemical terms as ethylene propylene diene monomer. EPDM rubber was developed in the early 1960s as companies and chemists set out to produce unique synthetic elastomers. After it’s first initial discovery, the DuPont chemical company was the first to refine the rubber into the product that we know today. These days, an increasing number of industries use EPDM sheet rubber in products that need both elasticity and UV and ozone resistances. EPDM’s resistance to weathering is the material’s defining feature that sets it apart from most other elastomers.
What is ethylene propylene rubber?
Ethylene propylene rubber is commonly produced as EPDM sheet rubber, which is used to create gaskets, seals, protective pads, and other various products. This rubber essentially mirrors many of the physical properties of natural rubber and adds the all-important functional property of weathering resistance.
What is the difference between NBR and EPDM?
It is also known for maintaining its stability in low temperatures. A sheet of NBR rubber can survive in temperatures as low as -22 degree Fahrenheit. On the other hand, EPDM sheet rubber lies on the opposite side of the spectrum and can operate at higher temperatures. The rubber is also more resistant to water swell and weathering elements.
When was EPDM rubber popular?
Much like nitrile butadiene rubber was a gift to manufacturers during the years prior to World War II, so too was EPDM rubber a gift to industry in the 1960s. Continuing to be popular ever since it’s arrival onto the manufacturing scene, there will always be an EPDM product near you.
Which is more resistant to weathering elements: rubber or silicone?
The rubber is also more resistant to water swell and weathering elements. EPDM vs. Silicone: Although UV and ozone resistances can be considered as the defining features of EPDM rubber , silicone is actually the synthetic elastomer with the highest resistances to such weathering elements.
Is EPDM better than SBR?
However, an SBR product will have a much better resistance to abrasions than an EPDM product would.
EPDM temperature range
The most common use of a rubber compound with EPDM is for the following temperature range:
EPDM rubber Resistance
Ethylene-propylene-diene rubber is also characterized by many properties and good resistance to many factors, such as:
What is EPDM made of?
EPDM is made through the cross-linking of ethylene, propylene, and diene monomers through the process of vulcanization. These chemical compounds give EPDM elastomers the ability to resist the damaging effects of abrasive environmental factors such as UV rays, ozone, moisture, and oxidation. The level of environmental resistance, in particular, depends on the ethylene or propylene content in the formulation of this weather resistant rubber material. A case in point, “The double bonds in ethylene and propylene molecules (and one of the double bonds in the diene molecules) are opened so that one single bond can be used to link to a carbon atom of another molecule…EPDM , with the double bonds located in the side groups, is much less susceptible to degradation by weathering and sunlight; although the double bonds can be broken by ozonolysis, thermal deterioration, or oxidation, such processes will not break the main chains” (Britannica.com). In addition, due to these environmental resistance properties, EPDM elastomers are known for being a crack-less rubber that is able to withstand damaging outdoor factors as well as impacts and abrasions.
What is the difference between silicone rubber and EPDM?
An example of this can be seen in EPDM liners that are often used to line potable water tanks due to the elastomer’s high impermeability and weather resistance. Silicone rubber, on the other hand, is ideal for food related applications as it is highly non-reactive to food, beverages, and cooking oils, making it the best food grade rubber available, even over EPDM elastomers. EPDM sheets are resilient synthetic rubber materials that are ideal for outdoor usage rather than food related applications.
What is food grade rubber?
EPDM is generally an outdoor rubber material, but food grade EPDM rubber is available in the market. It is important to understand that EPDM elastomers are best used as outdoor rubber materials rather than food grade rubber. The most commonly used food grade rubber is silicone due to its high tolerance to extreme heat. According to the FDA (Food and Drug Administration), “Rubber articles intended for repeated use may be safely used in producing, manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food, subject to the provisions of this section [FDA 21 CFR 177.2600]” (accessdata.fda.gov). Food grade EPDM elastomers can be used in the making of FDA approved seals and store products due to its high resistance to extreme heat and low temperatures. With a wide operating temperature range of -40 to 212 degrees Fahrenheit, EPDM elastomers are ideal for food storage seals, such as refrigerator and freezer seals or food warmers. For instance, “As a durable elastomer, EPDM is conformable, impermeable, and a good insulator…It is used to create…seals on doors for refrigerators and freezers (where it can also act as an insulator)” (Wikipedia.org). Despite these properties of EPDM elastomers, it does not match the temperature range FDA approved silicone can withstand. As a case in point, “Silicone rubbers have excellent low temperature flexibility combined with outstanding high temperature resistance. Their service temperatures range from −70 °C to 250 °C [-94 to 482 degrees Fahrenheit]” (sciencedirect.com). Both elastomers have high tensile strengths and low compression sets, preventing them from tearing and allowing them to return to its original form after being under heavy pressure or tight seals. Furthermore, both white and black EPDM materials can be FDA approved, but most food grade rubbers are white due to aesthetic purposes. Food grade black EPDM, or any other food grade elastomer, is not popular because of its dark, industrial look. Black is a very bold color that is often associated with industrial use whereas white or gray are softer, making them the preferred colors to work with in applications for human consumption or for medical use. Although EPDM elastomers can be food grade materials, silicone is able to withstand a wider range of temperatures making it the best food grade rubber option available.
Is EPDM a food grade material?
EPDM elastomers can be food grade materials if they follow the compositional guidelines set forth by the U.S. Food and Drug Administration. However, as the superior weather resistant rubber, EPDM sheets are better used outdoors or in industrial settings rather than for food handling applications. The chemical composition of EPDM allows it to have excellent resistance against degradation caused by UV rays, ozone, and oxidation. For food service applications, silicone is the best option due to its higher temperature resistance range and resistance to oil. EPDM liners are an exception as they are often used to line outdoor potable water tanks due to its resistance to damaging environmental factors. Although EPDM elastomers can be used as food grade rubber, its composition makes it better suited for outdoor or industrial applications.
Is silicone the same as EPDM?
EPDM is not a silicone and is an entirely separate synthetic elastomer. Although both synthetic elastomers are used in similar applications, silicone is an inorganic material that is most often used in food service applications. EPDM elastomers are comprised of ethylene, propylene, and diene monomers while silicone is “an inorganic polymer that comprises of silicone, with carbon, hydrogen, and oxygen” (medium.com). EPDM and silicone are highly durable synthetic rubber materials; however, they have different properties that makes each better suited for different applications. Both are heat resistant materials that can also stand up well against damaging environmental factors. Additionally, they both retain high tensile strengths allowing for excellent tear resistance while being stretched to extreme lengths. However, silicone and EPDM elastomers are commonly used for different applications. Although they both have a high tolerance to heat, silicone rubber is able to withstand highs of up to +500 degrees Fahrenheit whereas EPDM elastomers can only withstand temperatures as high as 212 degrees Fahrenheit. This allows silicone to be a better food grade rubber than EPDM along with the fact that silicone is highly non-reactive to food and is ideal for use in applications involving materials for human consumption. Silicone rubber is best known for being a food safe rubber and is often used in food storage and cooking applications while EPDM elastomers are better used in outdoor or industrial settings.
Is EPDM safe for drinking water?
EPDM is safe for drinking water and is a popular elastomer used in applications involving human consumption once it is FDA approved. EPDM liners are often used in potable water tanks due to their impermeability and resistance to outdoor damaging factors. There are specific guidelines put forth by the U.S Environmental Protection Agency (EPA) to prevent toxic substances from leaching into the drinking water. The EPA has “established protective drinking water standards for more than 900 contaminants including drinking water regulations issued since the 1996 amendments to the Safe Drinking Water Act that strengthen public health protection” (epa.gov). Contaminants not only come from chemical solvents, but they can also leach out of toxic materials as well. Synthetic rubbers, such as EPDM elastomers, are generally the variations of rubber that are used to line potable water tanks and other means of storing or transporting potable water. In fact, “EPDM 1.0mm rubber membrane are used for potable water applications” (environmental-expert.com). EPDM liners are ideal for applications involving drinking water due to its superior resistance to water. For instance, “Ethylene propylene diene rubber (EPDM), with its superior hydrolytic stability and resistance to chloramines, is becoming more widely used in these applications” (waterworld.com). However, silicone is known for its excellent compatibility with food and drinks. Case in point, “Many experts and authorities consider silicones to be nontoxic and safe for contact with food and drink. For example, Health Canada states: "There are no known health hazards associated with use of silicone cookware. Silicone rubber does not react with food or beverages or produce any hazardous fumes’” (mindbodygreen.com). Although EPDM liners are durable, impermeable, and weather resistant rubber materials, silicone is the best and most commonly used food grade elastomer for food and drinking water.
Is EPDM oil resistant?
While EPDM is highly resistant to the damaging effects of most industrial chemicals, it is not an oil resistant material. EPDM elastomers have excellent resistance to chemicals, allowing EPDM products to be used in chemically related applications; however, “like other hydrocarbon elastomers, the ethylene-propylene copolymers are swollen and weakened by hydrocarbon oils” (Britannica.com). Sometimes, EPDM elastomers can be used in the presence of mineral oils; however, it can only be used in static applications because it will be subjected to 10 to 20 percent volume swell where applicable. Mineral oil is “a clear, odorless liquid and a common ingredient in a variety of cosmetics and personal care products. Mineral oil is made from highly refined, purified and processed petroleum” (chemicalsafetyfacts.org). This non-toxic oil can also be used in food along with cosmetics. However, when looking for an oil resistant food grade rubber, silicone would be your best option due to its high heat and oil resistance along with its non-reactive with food and beverages and will not emit any toxic fumes when heated while cooking. EPDM elastomers are resistant to mineral oils, but it will not be resistant to industrial oils as well as other cooking oils making silicone best suited for food service applications.
How is EPDM made?
EPDM is manufactured by crosslinking the chemicals ethylene, propylene, and diene monomers through the process of vulcanization. Vulcanization refers to the “chemical process by which the physical properties of natural or synthetic rubber are improved; finished rubber has higher tensile strength and resistance to swelling and abrasion and is elastic over a greater range of temperatures” (Britannica.com). This unique blend of chemical compounds gives EPDM rubber sheets their excellent outdoor resistance properties. More specifically, the main two monomers, ethylene and propylene, affect the chemical and physical properties of the EPDM elastomer. As a case in point, “The quantitative ratio of the monomers confers particular properties on the final elastomer. For example, usage of high ethylene content [in EPDM] will produce polymers with high green strength, whereas low and medium values with produce softer and more elastic polymers” (academia.edu). In general, EPDM rubber sheets can withstand most harsh chemicals allowing it to provide reliable applications in industrial settings where they can be exposed to chemicals. In addition, although EPDM rubber sheets are highly resistant to many harsh chemicals, it excels at being an outdoor weather-resistant rubber material.
What is the difference between nitrile rubber and EPDM rubber?
As a weather-resistant rubber, EPDM rolls are popularly used in outdoor workplaces due to its excellent resistance towards UV rays, ozone, and oxygen whereas nitrile rubber will become damaged. Nitrile rubber, contrastingly, cannot withstand outdoor environments, but is able to resist oil, grease, and gasoline. An EPDM elastomer is a resilient weather-resistant rubber that is an extremely versatile material that is often used in both indoor and outdoor industrial workplaces.
How to make nitrile rubber?
You can make nitrile rubber by combining butadiene and acrylonitrile together into a single compound by heating the chemicals through the vulcanization process. Much like the process of producing EPDM rubber sheets, the chemical compounds used in the production of nitrile rubber dictates the chemical and physical properties of the elastomer. For example, “With increasing acrylonitrile content, [nitrile] shows high strength, greater resistance to swelling by hydrocarbons, and lower permeability to gases” (Britannica.com). Additionally, nitrile is compatible with chemicals, such as ammonia, detergents, mercury, methyl alcohol, and zinc sulfate, which makes nitrile a resilient industrial rubber material. Nitrile is best known for its superior resistance to oil and fuel which makes it the ideal material for use in automotive industries or in industrial applications involving oil or grease.
Is nitrile better than EPDM?
Although EPDM and nitrile are both synthetic rubbers, they are not the same material as EPDM is better resistant to outdoor environments than nitrile, and nitrile is better resistant to oils and greases than EPDM. Each rubber is made up of a unique blend of chemicals that give these synthetic rubbers enhanced physical strength and chemical resistance than that of natural rubbers. EPDM rubber sheets are made with chemicals ethylene, propylene, and diene monomers that give ethylene propylene rubber its unique outdoor resistance and chemical resistance properties. Nitrile, contrastingly, is a synthetic rubber that is “derived from acrylonitrile (ACN) and butadiene” (Wikipedia.org). These chemical compounds allow each elastomer to be use in applications the other cannot. For instance, ethylene propylene rubber retains excellent resistance to environmental damaging factors while nitrile can become severely damaged when exposed to outdoor conditions; however, nitrile holds better chemical resistance properties than EPDM and is able to be used in oil-related applications whereas EPDM rubber sheets will swell and become weakened. The difference in chemical compositions of the two elastomers gives each their own unique characteristics than that of the other elastomer.
Is nitrile rubber a good rubber?
As an outdoor rubber, EPDM rolls are often used outdoors whereas nitrile rolls are generally used indoors. An EPDM elastomer is better able to withstand harsh environmental factors than nitrile making it the ideal outdoor rubber; however, nitrile rubber holds the upper hand when it comes to resisting oil, grease, and gasoline. EPDM rubber sheets are still the ideal weather-resistant rubber material for industrial settings that are exposed to UV rays, ozone, or oxygen.
What is EPDM resistant to?
EPDM is extremely resistant to many chemicals such as Acetaldehyde, Acetamide, and Ammonia. Viton is resistant to many hydrocarbons and is best to use with chemicals in the petroleum industry.
What is the best rubber for oil?
If you are looking for an oil resistant rubber, neoprene is a good choice and it also has a temperature resistance of up to 200 degrees Fahrenheit (F). Neoprene also has a low oxidation rate so it is suitable for both indoor and outdoor applications.