Why Anti Aging Temperature Tape To Add Ethylene-propylene Rubber
Ethylene-propylene rubber is derived from copolymerization of vinyl monomer and propylene as the main orientation. It consists of two ethylene-propylene rubber (EPM) and two types of EPDM rubber (EPDM).
EPM formed by copolymerization of ethylene and propylene 20%~30%. Unique key in the chain are saturated rubbers. Not with sulfur curing, can only use peroxide Crosslinking. Slow curing, curing agent of your limited its application.
EPDM was introduced in ethylene-propylene copolymers of unsaturated monomers III. Such as: the vinyl norbornene double cyclopentadiene. This sulfur curing, nature is similar to EPM. There are polar substituent, non-crystalline, relative density 0.86~0.88.
1, excellent aging resistance. Ozone resistance ability than butyl rubber and CR. Good weather resistance, cracks in Sun for 3 years. Crack crack, SBR5 days NR150 days, 70 days break. Good resistance to aging. 150 ℃ long-term use. Ageing resistance is the best general purpose rubber.
2, resistance to chemical corrosion. Various polar chemicals and acids, alkalis have a greater resistance. Poor resistance to hydrocarbon oils.
3, excellent electrical insulation. More than butyl rubber, suitable for 45~65KW of high pressure.
4, good shock and cold. Rebound rate of up to 50%~60%, after the NR and BR, elasticity at low temperatures to keep good performance-57 hardened, brittle-77 ℃.
Disadvantages: slower curing rate () 3 to 4 times times slower than normal. Other unsaturated rubber and difficult; poor self adhesive and mutual sticky and adhesive difficult, bad processing performance.
But it is easy, cheap, mainly used in hose, tape, automotive accessories, such as cables and wires.