Butyl
Butyl rubber is a copolymer of isobutylene and a small percentage or isoprene.
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With careful compounding Butyl has really good tensile strength.
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Butyl has very low permeability to air and other gases.
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Excellent resistance to ozone, oxidation and sunlight.
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Excellent temperature range of -45º C to +130º C for normal compounds and even better with special formulations like cured resin.
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Butyl has very low resilience which makes it ideal for vibration damping and shock absorption applications.
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Butyl has moderate resistance to abrasion and compression set.
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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 |
| 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 |
The current technical information has been carefully checked and given in good faith but it is not exempted from possible typing errors.
Historically, compounds have different commercial names in each market.
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