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Rubber Specifications

This table provided is a general guide to the properties of compounds containing natural and synthetic rubbers.

Most rubbers used in the manufacture of rubber hose and rubber linings contain about 60% by weight of rubber, the balance is made up of chemicals each contributing something to the physical properties of the finished product, or as an aid in processing. The selection of these components is very much a matter of compromise since the full achievement of one property is usually at the expense of another.

 

Common Name

ASTM Designation

Composition

Temp Limits

General Properties

Natural

NR

Isoprene, Natural

70 Deg C

Excellent physical properties including abrasion and low temperature resistance. Poor resistance to petroleum based fluids.

Neoprene

CR

Chloroprene

90 Deg C

Good weather resistance. Flame retarding. Moderate resistance to petroleum based fluids. Good physical properties.

Bromo Butyl

IIR

Isobutene-Isoprene

100 Deg C

Very good weathering resistance. Low permeability to air. Good physical properties. Poor resistance to petroleum based fluids.

Nitrile

NBR

Nitrile-Butadiene

110 Deg C

Excellent resistance to petroleum based fluids. Moderate resistance to aromatics. Good physical properties.

SBR

SBR

Styrene-Butadiene

80 Deg C

Good physical properties including abrasion resistance. Poor resistance to petroleum based fluids.

Hypalon

CSM

Chloro-Sulfonyl-Polyethylene

110 Deg C

Excellent ozone, weathering and acid resistance. Good abrasion and heat resistance. Fair resistance to petroleum based fluids.

Ethylene Propylene

EPDM

Ethylene-Propylene-Diene-Terpolymer

110 Deg C

Excellent ozone, chemical and ageing characteristics. Poor resistance to petroleum based fluids.

Viton

FPM

Fluorinated Rubber

180 Deg C

Excellent chemical and temperature resistance. Good resistance to petroleum based products and ozone. Poor physical properties.

Data is presented for use only as a general guide and should not be the basis for design decisions.