Epr Ethylene Propylene Rubber

Ethylene propylene rubber epr sometimes called epm referring to an astm standard is a type of synthetic elastomer that is closely related to epdm rubber.

Epr ethylene propylene rubber. Ethylene propylene rubber epr epdm epr copolymer ethylene propylene and ethylene propylenediene rubber epdm terpolymer are particularly useful when sealing phosphate ester hydraulic fluids and in brake systems that use fluids having a glycol base. Ep refers to the ethylene propylene family of rubber materials. Ethylene propylene rubber is a generic term for a wide range of polymers based on copolymers of ethylene and propylene. Epdm rubber ethylene propylene diene monomer rubber is a type of synthetic rubber that is used in many applications.

The base polymer of epr cable was first developed in the early 1960s can vary in crystallinity chemistry etc. Epr specifically refers to ep copolymer while epdm refers to ep terpolymer. In industries ethylene propylene rubber epr is being used in the manufacturing of seals automotive weather stripping roofing membranes expansion joints rubber mechanical fittings and parts hoses belts and tubes. The skeletal formula of ethylene propylene rubber.

Epr is widely used as an insulator for. From a performance standpoint there is no noticeable difference. Epdm is an m class rubber under astm standard d 1418. Heat resistance up to 150 c 302 f max.

The m class comprises elastomers having a saturated chain of the polyethylene type the m deriving from the more correct term polymethylene. Ep copolymers must be peroxide cured while epdm polymers can be cured via sulfur or. Epr aka epm ep copolymer contains only ethylene and propylene monomers. Epdm is also based on the same constituent monomers however as no unsaturation is present in the backbone it is added as a third monomer pendent to the main chain.

Epr is widely used as an insulation material for electric cables due to its high dielectric strength but it is. What s the difference between ep epr and epdm. Since introduction in the 1960s annual production has increased to 870 000 metric tons. The most prominent application of ethylene propylene rubber is in epr insulation.

As the base resin is too soft for direct application in cable a range of fillers dominated by highly refined clay is employed to achieve the required mechanical and electrical properties epr cable compound is highly stable chemically and thermally and epr based cables can be. Epdm aka ept ep terpolymer is composed of ethylene propylene and a third monomer called a diene three different dienes are in common use today but discussing their differences gets extremely dry and technical. This document and other information from parker hannifin corporation its. The epr polymers can be tailored for different applications.

It is one of a number of rubber insulation materials. Epm sometimes also known as ep rubber is based on ethylene and propylene monomers with no unsaturation carbon carbon double bonds present. Ethylene propylene rubber epm epr epdm thermal application type. Low temperature 30 f specifications met.