Vibration-proof rubber composition and vibration-proof rubber using the same
View Patent ↗A vibration-proof rubber composition excellent in both characteristics of durability and compression set characteristic is provided. A vibration-proof rubber composition includes components (A) to (C) below, wherein an amount of reacted silane coupling agent in the component (B) is 6.5% by weight or more, and an amount of unreacted silane coupling agent is in a range of 0.5 to 2.5% by weight: (A) diene rubber; (B) pre-treated silica prepared by surface-treating, with a silane coupling agent, silica having a BET specific surface area in a range of 180 to 230 m 2 /g; and (C) sulfur.
1. A vibration-proof rubber composition, comprising:
diene rubber;
surface-treated silica, comprising at least 6.5% by weight of a reacted silane coupling agent, and 0.5 to 2.5% by weight of an unreacted silane coupling agent, wherein a silica before surface treatment has a BET specific surface area in a range of 180 to 230 m 2 /g; and
sulfur.
2. The vibration-proof rubber composition according to claim 1 , wherein an amount of the surface-treated silica is in a range of 20 to 60 parts by weight relative to 100 parts by weight of the diene rubber.
3. The vibration-proof rubber composition according to claim 2 , wherein an amount of a silane coupling agent charged to the silica before surface treatment is in a range of 8 to 18% by weight relative to 100% by weight of the silica.
4. The vibration-proof rubber composition according to claim 3 , wherein the surface-treated silica is not washed.
5. The vibration-proof rubber composition according to claim 4 , wherein an amount of the sulfur is at least 1.5 parts by weight relative to 100 parts by weight of the diene rubber.
6. A vibration-proof vehicle suspension part comprising the vibration-proof rubber composition according to claim 1 .
7. A vibration-proof vehicle suspension part comprising the vibration-proof rubber composition according to claim 2 .
8. A vibration-proof vehicle suspension part comprising the vibration-proof rubber composition according to claim 3 .
9. A vibration-proof vehicle suspension part comprising the vibration-proof rubber composition according to claim 4 .
10. A vibration-proof vehicle suspension part comprising the vibration-proof rubber composition according to claim 5 .