Butyl
Butyl rubber is a copolymer of isobutylene and a small percentage or isoprene.
-
With careful compounding Butyl has really good tensile strength.
-
Butyl has very low permeability to air and other gases.
-
Excellent resistance to ozone, oxidation and sunlight.
-
Excellent temperature range of -45º C to +130º C for normal compounds and even better with special formulations like cured resin.
-
Butyl has very low resilience which makes it ideal for vibration damping and shock absorption applications.
-
Butyl has moderate resistance to abrasion and compression set.
-
Resistance to chemicals; resistant to most inorganic products. Highly resistant to mineral acids, alkalines and aqueous acids. Not recommended to use in contact with oils, or hydrocarbon solvents.
| Ref. |
Specific Gravity |
Hardness |
Tens. Stren. |
Elong. |
Tear. Stren |
Compres. Set |
Working
Temp. |
| |
g/cm3 |
Shore A |
M Pa |
% |
N/mm |
C |
h |
% |
º C |
| T528 |
1,22 |
50 |
7 |
400 |
20 |
70 |
22 |
30 |
-40/130 |
| T641 |
1,20 |
60 |
9 |
500 |
40 |
70 |
22 |
25 |
-40/130 |
| T620 |
1,27 |
60 |
8 |
400 |
25 |
70 |
22 |
25 |
-40/130 |
| T621 |
1,18 |
65 |
9 |
400 |
30 |
70 |
22 |
25 |
-40/130 |