| COMPOUND |
SOG
CODE |
ADVANTAGES |
LIMITATIONS |
|
Nitrile
Rubber
(NBR)
|
N |
| * |
Good oil and
fuel resistance. |
| * |
Good heat resistance
up to 120oC in oil. |
| * |
High tensile
strength. |
| * |
Low swelling
in water. |
|
| * |
Poor
weather and ozone resistance. |
| * |
Poor
resistance against polar fluids. |
| * |
Poor
resistance against chlorinated hydrocarbon. |
| * |
Poor
resistance against aromatic fluids. |
|
Polyacrylate
Rubber
(ACM) |
P |
| * |
Good
oil and fuels resistance. |
| * |
Good
heat resistance p to 150oC in oil. |
| * |
Good
weater and ozone resistance. |
|
| * |
Not usable
in contact with water and water solutions |
| * |
Limited cold
flexibility. |
| * |
Limited tensile
strength and tear resistance. |
| * |
Poor wear resistance. |
| * |
Poor resistance
against polar and aromatic and chlorinated hydrocarbons. |
|
Silicone
Rubber |
S |
| * |
Good heat resistance
up to 180oC. |
| * |
Best heat resistance
of all rubber types. |
| * |
Excellent low
temp. Resistance of all rubber types. |
| * |
Excellent weather
and ozone resistance. |
|
| * |
Poor
tensile and tear strength. |
| * |
Poor
wear resistance. |
| * |
Sensitive
to hydrolysis. |
| * |
Poor
resistance against aromatic oils and oxidized mineral oils. |
| * |
Poor
diffusion resistance. |
|
| Urethane |
U |
| * |
Good
heat resistance up to 200oC |
| * |
Good
solvent and ozone resistance. |
|
| * |
Poor
comression set tends to soften above 250oC and in hot
water. |
|
Fluorinated
(FPM) |
V |
| * |
Good
heat resistance up to 200oC |
| * |
The
resistance against oil and fuels is better than other types. |
| * |
The
only highly elastic rubber whice is resistant to aromatic and chlorinated
hydrocarbons. |
| * |
Excellent
heat resistance. |
| * |
Excellent
weather and ozone resistance. |
| * |
Excellent
acid resistance. |
| * |
Low
swelling in water. |
|
| * |
Limited
cold flexibliity. |
| * |
Limited
tensile and tear strength. |
| * |
Limited
wear resistance. |
| * |
High
compression set in hot water. |
| * |
Poor
resistance to polaric solvents. |
|
