Urethane Rubber
COMMON NAME: Urethane, Polyurethane
General Characteristics
- ASTM D-2000 Classification: BG
- Military (MIL STD 417): SB
- Chemical Definition: Polyester/Polyether Urethane
- Durometer Range (Shore A): 35-100
- Tensile Range (P.S.I.): 500-6000
- Elongation (Max %): 750
- Compression Set: Poor
- Resilience-Rebound: Good
- Abrasion Resistance: Excellent
- Tear Resistance: Excellent
- Solvent Resistance: Poor
- Oil Resistance: Good
- Low Temperature Usage (F°): -10° to -30°
- High Temperature Usage (F°): to 175°
- Aging Weather-Sunlight: Excellent
- Adhesion to Metals: Fair to Good
The castable types have excellent abrasion resistance;
good compression set at high hardness levels; low
friction surface; tensile strengths up to 6000 PSI; good
ozone resistance; good oil and solvent resistance; and
poor heat and hot water resistance.
The millable types of Polyurethane are in wide use today.
Through the use of reinforcing pigments and other
chemicals, desirable characteristics can be obtained to
fit a variety of applications: wear resistance is excellent
and greatly superior to most other polymers; the surface
is of low friction nature; oil resistance is good and
equivalent to the better nitriles but is not recommended
for use in water or heat above 175 degrees F.; plus good
ozone resistance and low rebound characteristics.
Urethane is not normally attacked by moderate
chemicals and hydrocarbons. It is generally attacked by
concentrated acids, ketones, esters, chlorinated and nitro
hydrocarbons
