Description of EPDM
1. Low density and high filling capacity. The density of ethylene-propylene rubber is a lower type of rubber.
2. Aging resistance: Ethylene-propylene rubber has excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical properties, oil filling and normal temperature fluidity. Ethylene-propylene rubber products can be used for a long time at 120°C and for short or intermittent use at 150-200°C. Adding appropriate antioxidants can increase its service temperature. Peroxide-crosslinked EPDM rubber can be used under harsh conditions. EPDM rubber can last for more than 150 hours without cracking under the conditions of ozone concentration of 50 pphm and stretching of 30%.
3. Corrosion resistance Because ethylene propylene rubber lacks polarity and has low unsaturation, it is resistant to various polar chemicals such as alcohols, acids, alkalis, oxidants, refrigerants, detergents, animal and vegetable oils, ketones and greases, etc. Better resistance;
4. Water vapor resistance: Ethylene propylene rubber has excellent water vapor resistance and is estimated to be better than its heat resistance. In superheated steam at 230°C, there is no change in appearance after nearly 100 hours. However, under the same conditions, the appearance of fluorine rubber, silicone rubber, fluorosilicone rubber, butyl rubber, rubber and natural rubber will deteriorate significantly in a short period of time.
5. Elasticity: Since there are no polar substituents in the molecular structure of ethylene-propylene rubber, the molecular cohesion energy is low, and the molecular chain can maintain flexibility in a wide range, second only to natural rubber and butadiene rubber, and can still maintain it at low temperatures.
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