Anti-vibration rubber composition and anti-vibration rubber member
AssigneeSumitomo Riko Company Limited
InventorsMasashi Okahisa, Seiji Kasai
Life of this patent
Estimating the term…
Abstract
An anti-vibration rubber composition contains: a polymer comprising component (A); and components (B) to (E). The mixing ratio of the components (B) and (C) is in a range of (B)/(C)=99/1 to 96/4 in weight ratio. As a result, it becomes possible to achieve a low dynamic magnification and to achieve both durability and weather resistance at a high level. (A) diene rubber; (B) silica; (C) carbon black; (D) silane coupling agent; (E) dihydrazide compound represented by general formula (1). [in general formula (1), R represents an alkylene group having 1 to 30 carbon atoms, a cycloalkylene group having 1 to 30 carbon atoms, or a phenylene group].
Claims7
An anti-vibration rubber composition, comprising:
- a polymer comprising component (A);
- and components (B) to (E), wherein the mixing ratio of the components (B) and (C) is in a range of (B)/(C)=99/1 to 96/4 in weight ratio,
- (A) diene rubber;
- (B) silica;
- (C) carbon black;
- (D) silane coupling agent;
- (E) dihydrazide compound represented by general formula (1),
- in general formula (1), R represents an alkylene group having 1 to 30 carbon atoms, a cycloalkylene group having 1 to 30 carbon atoms, or a phenylene group,
- the diene rubber containing a natural rubber (NR) as a main component is used, wherein the main component is 80% by weight or more of the diene rubber (A) is the natural rubber,
- a content of the silica (B) is 20 to 60 parts by weight with respect to 100 parts by weight of the diene rubber (A),
- a content of the carbon black (C) is 0.1 to 5 parts by weight with respect to 100 parts by weight of the diene rubber (A).
Dependencies are inferred from the claim text.