Abstract: A vibration-isolating rubber composition contains components (A) and (B) below and components (C) and (D) below, wherein the amount of the component (B) added is 10 to 100 parts by weight relative to 100 parts by weight of the component (A); (A) diene rubber; (B) silica having all the properties (?), (?), and (?); (?) a silanol group density of the silica surface of 3.0 groups/nm2 or more as calculated by the Sears titration method, (?) an average particle diameter of 10 ?m or less, and (?) a BET specific surface area of 15 to 60 m2/g; (C) a silane coupling agent having a specific structure; and (D) at least one of zinc monomethacrylate and a specific mono(meth)acrylate. Therefore, the vibration-isolating rubber composition exhibits good heat resistance, durability, and stiffness and a reduced dynamic multiplication.

Abstract: A vibration damping rubber composition is provided, which comprises: (A) natural rubber (NR) as a major component; (B) zinc monomethacrylate; and (C) a sulfur-containing vulcanizing agent; wherein the component (B) is present in a proportion of 0.1 to 10 parts by weight based on 100 parts by weight of the component (A). The vibration damping rubber composition is excellent in vibration damping property as well as long-term thermal aging resistance.

Abstract: An antivibration rubber composition containing diene rubber (Component A) and silica (Component B). The amount of the Component B contained is set to a range from 10 to 100 parts by weight with respect to 100 parts by weight of the Component A. The Component B has the following properties, i.e., a surface silanol-group density of not less than 3.0 groups/nm2 as determined by the Sears titration method, an average particle size of not more than 10 ?m, and a BET specific surface area of 15 to 60 m2/g.

Abstract: A rubber part having an aluminum-based metal component including the metal component, a chemical film A formed on an outer peripheral surface of the metal component which is transformable following a squeezing of the metal component, an adhesive layer B formed on an outer peripheral surface of the chemical film A, and the rubber part formed on an outer peripheral surface of the adhesive layer B. The chemical film A includes zinc fluoride, molybdenum and aluminum fluoride, in which zinc of the zinc fluoride, the molybdenum and aluminum of the aluminum fluoride are present in a content ratio of zinc/molybdenum/aluminum=4.0 to 5.5/3.0 to 5.0/0.5 to 1.5 on a mass basis.

Abstract: A rubber member is provided which includes an aluminum-based inner metal tube (2) (aluminum-based metal component), a film (A) chemically formed on an outer peripheral surface of the inner metal tube (2), an adhesive layer (C) provided on an outer surface of the film (A), and a vibration damping rubber (1) provided on an outer surface of the adhesive layer (C). The film (A) contains manganese oxide and zirconium oxide. In the film (A), manganese from the manganese oxide is present in a content of 10 to 30 mg/m2 on a manganese atom weight basis, and zirconium from the zirconium oxide is present in a content of 5 to 40 mg/m2 on a zirconium atom weight basis. The film (A) is free from deterioration in adhesion to the aluminum-base metal component which may otherwise occur due to heat applied for vulcanization of a rubber material, and is excellent in followability to deformation of the aluminum-based metal component.

Abstract: There is provided a rubber composition containing the following components: (A): an ethylene-?-olefin-nonconjugated polyene copolymer rubber, (B): a natural rubber, (C): an organic peroxide, (D): an aromatic amine compound, and (E): silica.

Abstract: There is provided a rubber composition containing the following components: (A): an ethylene-?-olefin-nonconjugated polyene copolymer rubber, (B): a natural rubber, (C): an organic peroxide, (D): an aromatic amine compound, and (E): an aluminum-based inorganic compound.

Abstract: An antivibration rubber composition containing diene rubber (Component A) and silica (Component B). The amount of the Component B contained is set to a range from 10 to 100 parts by weight with respect to 100 parts by weight of the Component A. The Component B has the following properties, i.e., a surface silanol-group density of not less than 3.0 groups/nm2 as determined by the Sears titration method, an average particle size of not more than 10 ?m, and a BET specific surface area of 15 to 60 m2/g.

Abstract: A rubber part having a metal fitting in which the metal fitting and the rubber part are integrated through an anti-corrosion chemical film formed on a surface of the metal fitting. The anti-corrosion chemical film is a zirconium-based chemical film that is harmless to human body and environment, and is transformable following the squeeze of the metal fitting. The rubber part having a metal fitting is produced by the steps of: degreasing an outer peripheral surface of the metal fitting, subjecting the surface to shot blasting treatment, degreasing the treated surface, and water washing the treated surface; forming a zirconium-based chemical film on the treated surface; water washing and drying an outer peripheral surface of the zirconium-based chemical film; forming an adhesive layer on the outer peripheral surface of the zirconium-based chemical film; and integrating the rubber part on the outer peripheral surface of the adhesive layer.

Abstract: A rubber part having an aluminum-based metal component including the metal component, a chemical film A formed on an outer peripheral surface of the metal component which is transformable following a squeezing of the metal component, an adhesive layer B formed on an outer peripheral surface of the chemical film A, and the rubber part formed on an outer peripheral surface of the adhesive layer B. The chemical film A includes zinc fluoride, molybdenum and aluminum fluoride, in which zinc of the zinc fluoride, the molybdenum and aluminum of the aluminum fluoride are present in a content ratio of zinc/molybdenum/aluminum=4.0 to 5.5/3.0 to 5.0/0.5 to 1.5 on a mass basis.

Abstract: A rubber part having a metal fitting in which the metal fitting and the rubber part are integrated through an anti-corrosion chemical film formed on a surface of the metal fitting. The anti-corrosion chemical film is a zirconium-based chemical film that is harmless to human body and environment, and is transformable following the squeeze of the metal fitting. The rubber part having a metal fitting is produced by the steps of: degreasing an outer peripheral surface of the metal fitting, subjecting the surface to shot blasting treatment, degreasing the treated surface, and water washing the treated surface; forming a zirconium-based chemical film on the treated surface; water washing and drying an outer peripheral surface of the zirconium-based chemical film; forming an adhesive layer on the outer peripheral surface of the zirconium-based chemical film; and integrating the rubber part on the outer peripheral surface of the adhesive layer.

Abstract: The present invention provides a corrosion prevention method for an aluminum-based metal component, which makes it easy to check the presence or absence of, a chemically formed film on the component, and a corrosion-proof aluminum-based metal product produced by the method. In the method, the following treatment agent (A) is brought into contact with a surface of the aluminum-based metal component to chemically form the following film (B) on the surface of the aluminum-based metal component: (A) a treatment agent comprising an aqueous solution of zinc sulfate, an aqueous solution of ammonium fluoride and an aqueous solution of sodium molybdate which are mixed together; (B) a chemically formed film (B) comprising zinc fluoride, molybdenum and aluminum fluoride. Thus, the corrosion-proof aluminum-based metal product is produced.

Abstract: A vibration damping rubber member comprising a metallic structure and a rubber material, which are interposed by an undercoating adhesive layer formed on the metallic structure and a finish coating adhesive layer formed on the undercoating adhesive layer and are integrally formed via the adhesive layers, wherein the undercoating adhesive layer is formed by resorcinol adhesive (component (A)), the finish coating adhesive layer is formed by adhesive consisting mainly of chlorinated polyolefin (component (B)), and the rubber material is bonded onto the finish coating adhesive layer by vulcanization. A method of producing the vibration damping rubber member is also disclosed.