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US 2005/0090618 A1Published application
Rubber composition for transmission belt, manufacturing method for the same and transmission belt using the same
AssigneeBando Chemical Industries, Ltd.
InventorShigeki Okuno
Life of this patent
Estimating the term…
Abstract
A rubber composition for power transmission belts in a sea-island structure contains an ethylene-α-olefin elastomer containing ethylene of 60 mass % or less in a sea phase, a hydrogenated acrylonitrile-butadiene rubber of which bonded acrylonitrile amount is 30 mass % or less in an island phase and an organic peroxide. The metal salt of unsaturated carboxylic acid is dispersed in each of the ethylene-α-olefin elastomer in the sea phase and the hydrogenated acrylonitrile-butadiene rubber in the island phase
Claims15
A rubber composition for a transmission belt, comprising:
- an ethylene-α-olefin elastomer which composes a sea phase in a sea-island structure and of which ethylene content is 60 mass % or less;
- a hydrogenated acrylonitrile-butadiene rubber which composes an island phase in the sea-island structure and of which bonded acrylonitrile content is 30 mass % or less;
- a metal salt of unsaturated carboxylic acid dispersed in each of said ethylene-α-olefin elastomer in the sea phase and said hydrogenated acrylonitrile-butadiene rubber in the island phase;
- and
- an organic peroxide.
2 more elements
A friction transmission belt for heavy duty power transmission, comprising:
- a friction face portion formed of a rubber made of a crosslinked rubber composition for a power transmission belt, said rubber-composition containing:
- an ethylene-α-olefin elastomer which composes a sea phase in a sea-island structure and of which ethylene content is 60 mass % or less;
- a hydrogenated nitrile-butadiene rubber which composes an island phase in the sea-island structure and of which bonded acrylonitrile content is 30 mass % or less;
- a metal salt of unsaturated carboxylic acid dispersed in each of said ethylene-α-olefin elastomer in the sea phase and said hydrogenated acrylonitrile-butadiene rubber in the island phase;
- and
- an organic peroxide,
- wherein a rubber hardness in durometr type D measured in accordance with JIS K6253 is in a range between 40 and 60, both inclusive, t5 in a German torsion test at −35° C. or lower, and an amount of extracted acetone is 9% or less in said rubber composition.
4 more elements
A friction transmission belt for heavy duty power transmission, comprising:
- a friction face portion formed of a rubber made of a crosslinked rubber composition for a transmission belt, said rubber composition containing:
- an ethylene-α-olefin elastomer which composes a sea phase in a sea-island structure and of which ethylene content is 60 mass % or less;
- a hydrogenated acrylonitrile-butadiene rubber which composes an island phase in the sea-island structure and of which bonded acrylonitrile content is 30 mass % or less;
- a metal salt of unsaturated carboxylic acid dispersed in each of said ethylene-α-olefin elastomer in the sea phase and said hydrogenated acrylonitrile-butadiene rubber in the island phase;
- and
- an organic peroxide,
- wherein a rubber hardness in durometr type A measured in accordance with JIS K6253 is in a range between 80 and 90, both inclusive, t5 in a German torsion test is −35° C. or lower, and an amount of extracted acetone is 12% or less in said rubber composition.
4 more elements
A toothed belt, comprising:
- a friction face portion formed of a rubber made of a crosslinked rubber composition for a transmission belt, said rubber composition containing:
- an ethylene-α-olefin elastomer which composes a sea phase in a sea-island structure and of which ethylene content is 60 mass % or less;
- a hydrogenated acrylonitrile-butadiene rubber which composes an island phase in the sea-island structure and of which bonded acrylonitrile content is 30 mass % or less;
- a metal salt of unsaturated carboxylic acid dispersed in each of said ethylene-α-olefin elastomer in the sea phase and said hydrogenated acrulonitrile-butadiene rubber in the island phase;
- and
- an organic peroxide,
- wherein a rubber hardness in durometr type A measured in accordance with JIS K6253 is in a range between 80 and 95, both inclusive, t5 in a German torsion test is −35° C. or lower, and an amount of extracted acetone is 10% or less in said rubber composition.
4 more elements
A method of manufacturing a rubber composition for a power transmission belt containing:
- an ethylene-α-olefin elastomer which composes a sea phase in a sea-island structure and of which ethylene content is 60 mass % or less;
- a hydrogenated nitrile-butadiene rubber which composes an island phase in the sea-island structure and of which bonded acrylonitrile content is 30 mass % or less;
- a metal salt of unsaturated carboxylic acid dispersed in each of said ethylene-α-olefin elastomer in the sea phase and said hydrogenated acrylonitrile-butadiene rubber in the island phase;
- and
- an organic peroxide,
- said method comprising the step of:
- kneading a hydrogenated acrylonitrile-butadiene rubber containing a composition of a metal salt of unsaturated carboxylic acid, an ethylene-α-olefin elastomer excluding a composition of a metal salt of unsaturated carboxylic acid, and compounding ingredeient for rubber containing an organic peroxide.
4 more elements
Dependencies are inferred from the claim text.