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Posi-flate
Elastomer Profiles
The following profiles
are offered as a general guide and indication of the suitability
of various elastomers in use today for service with these
chemicals and fluids. The ratings are based, for the most
part, on published literature of various elastomer suppliers
and rubber manufacturers, but, in some cases, they are the opinion
of experienced compounders. We cannot guarantee their accuracy
nor assume responsibility for use thereof. The purchaser
bears the final responsibility for chemical compatibility.
Test samples of elastomers may be supplied upon request.
| Buna-N |
| Chemical Definition: |
Butadiene Acrylonitrile |
| Compression Set: |
Good |
| Abrasion Resistance: |
Good |
| Solvent Resistance: |
Good to Excellent |
| Oil Resistance: |
Good to Excellent |
| Operating Temperature: |
Black Buna-N: -10°
F to 125° F
White Buna-N: 20 F to 125° F |
| Operating Pressure: |
Black Buna-N: 40
PSIG to 115 PSIG
White Buna-N: 40 PSIG to 70 PSIG |
| Aging Weather
- Sunlight: |
Fair |
|
Comments:
- Buna N is a general purpose elastomer which has good solvent,
oil and water resistance.
- Buna-N should not be used in highly polar solvents such as
Acetone and MEK.
|
| Polyurethane |
| Chemical Definition: |
Polyester/Polyether
Urethane |
| Compression Set: |
Good |
| Abrasion Resistance: |
Excellent |
| Solvent Resistance: |
Fair |
| Oil Resistance: |
Good |
| Operating Temperature: |
32° F to 150°
F |
| Operating Pressure: |
40 PSIG to 115 PSIG |
| Aging Weather
- Sunlight: |
Excellent |
|
Comments:
- Wear resistance is excellent and greatly superior to most
other polymers.
- Oil resistance is good and equivalent to the better nitriles.
- Good ozone resistance.
|
| EPDM |
| Chemical Definition: |
Ethylene Propylene |
| Compression Set: |
Good |
| Abrasion Resistance: |
Excellent |
| Solvent Resistance: |
Fair |
| Oil Resistance: |
Fair |
| Operating Temperature: |
-20° F to 150°
F |
| Operating Pressure: |
40 PSIG to 115 PSIG |
| Aging Weather
- Sunlight: |
Excellent |
|
Comments:
- Exceptionally good weather aging and ozone resilience.
- Excellent water and chemical resistance.
- Fairly good in ketones and alcohols.
|
| Fluoroelastomers |
| Chemical Definition: |
Fluorinated Hydrocarbon |
| Compression Set: |
Excellent |
| Abrasion Resistance: |
Good |
| Solvent Resistance: |
Excellent |
| Oil Resistance: |
Excellent |
| Operating Temperature: |
50° F to 200°
F |
| Operating Pressure: |
40 PSIG to 55 PSIG |
| Aging Weather
- Sunlight: |
Excellent |
|
Comments:
- Excellent in severe environments due to their comparatively
long useful service life.
- Outstanding resistance to a wide range of solvents and petroleum
based oils.
- Excellent heat resistance.
- Not be used in contact with ketones.
|
| Silicone |
| Chemical Definition: |
Polysiloxane |
| Compression Set: |
Excellent |
| Abrasion Resistance: |
Fabric Reinforced:
Fair to Poor
High Strength: Good |
| Solvent Resistance: |
Fair |
| Oil Resistance: |
Fair |
| Operating Temperature: |
Fabric Reinforced:
-40° F to 300° F
High Strength: -40° F to 300° F |
| Operating Pressure: |
40 PSIG to 115 PSIG |
| Aging Weather
- Sunlight: |
Excellent |
|
Comments:
- Excellent high and low temperature properties.
- High resistance to oxidation and ozone attack.
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