EPDM

introduce:
EPM (Ethylene-Propylene Rubber)It is a copolymer of ethylene and propylene and has great stability, ozone resistance, aging resistance, and heat resistance. However, it cannot add sulfur and can only be bridged by peroxide. In order to solve this shortcoming, a small amount of a third component with a double bond (diene) is introduced into the EPM chain during the polymerization process, and sulfur can be added. This is EPDM

Characteristics:

Advantage:	Shortcoming:
1) Excellent ozone resistance, better than CR, IIR	1) Bloom is prone to occur on the surface of vulcanized rubber
2) Good weather resistance, suitable for outdoor environments	2) Oil resistance, poor bending and crack resistance
3) Very good heat resistance, can reach high temperature of 150°C	3) Unsulfur-added raw wood has poor adhesion
4) Good electrical characteristics, corona resistance
5) Very stable to polar solvents (alcohols, ketones), hydrochloric acid and other inorganic drugs
6) Excellent mixing with oil and carbon black, high filling is possible

Classification:
Commercially available ethylene propylene rubber can be divided into EPM and EPDM according to the presence or absence of the third component. EPDM can be divided into ENB (Ethylidene norbornen) and DCPD (Dicyclo pentadiene) according to the third component type. The level of ENB composition is related to the speed of vulcanization, that is, the higher the ENB, the faster the vulcanization rate.Generally, ENB is distinguished from ordinary (about 4% ENB), fast (about 6% ENB), and extremely fast (about 8% ENB). % Or higher) three categories
use
Based on EPM/EPDM, which has good weather resistance and other excellent physical properties, it is widely used in vehicle parts, building materials, wires and cables, and various industrial rubber products.

Manufacturer:
There is currently no manufacturer in Taiwan that produces EPM/EPDM, and the raw materials required are all imported.