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 -49 F to +266 F 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 |
psi |
% |
ppi |
C |
h |
% |
F |
| T528 |
1,22 |
50 |
1000 |
400 |
110 |
70 |
22 |
30 |
-40/266 |
| T641 |
1,20 |
60 |
1300 |
500 |
225 |
70 |
22 |
25 |
-40/266 |
| T620 |
1,27 |
60 |
1150 |
400 |
140 |
70 |
22 |
25 |
-40/266 |
| T621 |
1,18 |
65 |
1300 |
400 |
170 |
70 |
22 |
25 |
-40/266 |