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US 9,315,656 B2Granted
Vibration isolating rubber composition and vibration isolating rubber
AssigneeBridgestone Corporation
InventorTakahiro Saito
Life of this patent
Estimating the term…
Abstract
Disclosed are a vibration isolating rubber composition that balances a low dynamic-to-static modulus with high durability, and a vibration isolating rubber that is formed by curing said rubber composition. The vibration isolating rubber composition is characterized by including a diene rubber, and a carbon black and a silica as fillers, and in that the mixing ratio of the carbon black (a) and the silica (b) is (a)/(b)=80/20 to 20/80 (weight ratio).
Claims14
A vibration isolating rubber composition consisting of a diene rubber,
- a carbon black and a silica as fillers, wherein the mixing ratio of the carbon black (a) and the silica (b) is (a)/(b) =80/20 to 20/80 (weight ratio),
- a silane coupling agent blended in the composition in an amount of 1 to 10 wt % based on the amount of the silica, and
- optional components,
- wherein the amount of the carbon black is from 10 to 16 parts by weight per 100 parts by weight of the diene rubber,
- wherein the carbon black has an iodine adsorption number in the range of 40 to 140 g/kg and a DBP oil absorption amount in the range of 90 to 160 ml/100 g and is selected from the group consisting of SRF, GPF, FEF, FT and MT,
- wherein the silica is a silica gel having a nitrogen adsorption specific surface area (BET method) in the range of 80 to 230 m2/g,
- wherein natural rubber (NR) is singly used as the diene rubber, or natural rubber (NR) and butadiene rubber (BR) are used together as the diene rubber within a blending ratio of NR/BR=70/30 to 100/0 (weight ratio), and
- wherein the optional components are selected from the group consisting of vulcanizing agents, oils, vulcanization accelerators and antioxidants.
5 more elements
A vibration isolating rubber composition consisting of
- a diene rubber,
- a carbon black and a silica as fillers, wherein the mixing ratio of the carbon black (a) and the silica (b) is (a)/(b) =40/60 to 20/80 (weight ratio),
- a silane coupling agent blended in the composition in an amount of 1 to 10 wt % based on the amount of the silica, and
- optional components,
- wherein the amount of the carbon black is from 10 to 16 parts by weight per 100 parts by weight of the diene rubber,
- wherein the carbon black has an iodine adsorption number in the range of 40 to 140 g/kg and a DBP oil absorption amount in the range of 90 to 160 ml/100 g and is selected from the group consisting of SRF, GPF, FEF, HAF, FT, and MT,
- wherein the silica is a silica gel having a nitrogen adsorption specific surface area (BET method) in the range of 80 to 230 m2/g,
- wherein natural rubber (NR) is singly used as the diene rubber, or natural rubber (NR) and butadiene rubber (BR) are used together as the diene rubber within a blending ratio of NR/BR =70/30 to 100/0(weight ratio), and
- wherein the optional components are selected from the group consisting of vulcanizing agents, oils, vulcanization accelerators and antioxidants.
6 more elements
Dependencies are inferred from the claim text.