Ethylene-propylene rubber mixtures
This rubber is a copolymer of propylene, ethylene and diene. Ethylene-propylene vulcanizates are good insulators with special resistance to atmospheric factors.
They are often used for seals working in water installations.
Temperature from -50°C to +130°C
Resistant to:
✔ | hot water and steam |
✔ | brake fluid |
✔ | glycol |
✔ | ozone |
✔ | soap solutions and washing agents |
✔ | acid and alkali solutions |
Sensitive to:
✘ | mineral oils |
✘ | mineral greases |
✘ | gasoline |
Mixtures based on nitrile rubber
Nitrile is a copolymer of butadiene and acrylonitrile. The percentage ratio of these chemical compounds determines the degree of oil and frost resistance.
Occurs as an isoprene polymer. The nitrile vulcanizate used in hydraulics and pneumatics is characterized by high flexibility
and tensile strength, oil resistance, low compression deformation.
Temperature from -30°C to +100°C
Resistant to:
✔ | motor, transformer and heating oils |
✔ | lubricants |
✔ | hydraulic fluids |
✔ | propane |
✔ | butane |
✔ | alcohols |
✔ | water |
Sensitive to:
✘ | high temperatures |
✘ | glycol based brake fluids |
✘ | concentrated acids and lyes |
✘ | gasoline |
Mixtures based on silicone rubber
Symbol according to ASTM 1418 - VMQ. It shows good dielectric properties, low compression deformation, very good resistance to oxygen and ozone.
A special advantage of using silicone vulcanizates is their resistance to high and low temperatures.
Low tear strength and relatively high abrasion eliminates silicone from applications in moving joints.
Temperature from -50°C to +200°C
Resistant to:
✔ | mineral oils and greases |
✔ | diluted salt solutions |
✔ | oxygen |
✔ | ozone |
Sensitive to:
✘ | concentrated acids and alkalines |
✘ | glycol based brake fluids |
✘ | gasoline |
Mixtures based on hydrogenated acrylonitrile rubber
Acrylonitrile rubber is a copolymer of acrylonitrile and butadiene with complete or partial hydrogenation of the double bond of the butadiene component.
Peroxide crosslinking through double bond increases temperature and oxidative stability. Rubber materials prepared in this way
they are characterized by high mechanical strength and greater resistance to abrasion. They show slightly higher media resistance as in the case of NBR.
Temperature from -30°C to +150°C
Resistant to:
✔ | vegetable and animal fats (temporarily up to 170°C) |
✔ | hydraulic fluids based on mineral oils |
✔ | higher resistance to temperature |
✔ | diesel fuels |
✔ | ozone |
✔ | dilute acids, alkalines and salts (even at elevated temperatures) |
Sensitive to:
✘ | fuels with a high aromatic content (gasoline, alcoholic mixtures) |
✘ | glycol based brake fluids |
✘ | concentrated acids and alkalines |
✘ | gasoline |
Fluorinated rubber compounds
Symbol according to ASTM 1418-FKM. Fluorine vulcanizates known under the name VITON are characterized by particularly high heat and chemical resistance.
The share of fluoride significantly affects non-flammability. They show low gas permeability and, under vacuum, a minimal weight loss.
The mechanical properties of these rubbers are similar to traditional mixtures.
Temperature from -25°C to +250°C
Resistant to:
✔ | UV radiation |
✔ | aggressive chemical compounds |
✔ | oils and grease |
✔ | inorganic acids (hydrochloric, sulfuric, phosphoric, nitric) |
✔ | vacuum |
✔ | ozone |
Sensitive to:
✘ | concentrated organic acids (acetic, formic) |
✘ | brake fluids |
✘ | acetone |
Mixtures based on natural rubber
Symbol according to ASTM 1418 - WR. This rubber is a multiparticulate polymer of isoprene. It is characterized by very good resistance to tearing and tearing,
flexibility and resistance to low temperatures. It is used when it is necessary to dampen vibrations as well as high fatigue resistance.
Temperature from -50°C to +70°C
Resistant to:
✔ | glycol based brake fluid |
✔ | low acid acids and lyes |
✔ | water |
Sensitive to:
✘ | motor fuels |
✘ | mineral greases and oils |
✘ | gasoline |
Mixtures based on steroid butadiene rubber
Styrene-butadiene rubber is a copolymer of butadiene and styrene. The elastic properties of styrene-butadiene vulcanizates are not inferior to their properties
elastic vulcanizates of natural rubber. However, SBR vulcanizates show greater resistance to: ozone, atmospheric factors, elevated temperature,
they are also resistant to abrasion. SBR rubber is mainly used for the production of car tires, shoe soles and products exposed to abrasion.
Temperature from -50°C to +100°C
Resistant to:
✔ | inorganic acids and alkalines |
✔ | water |
✔ | alcohols |
Sensitive to:
✘ | mineral oils and greases |
✘ | gasoline |
✘ | brake fluids |