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Rubber composition for torsional vibration damper

A technology of torsional vibration damper and rubber composition, applied in the direction of shock absorber, spring/shock absorber functional characteristics, shock absorber, etc. Good performance, prevention of discharge noise, high attenuation effect

Pending Publication Date: 2022-03-01
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, since the existing rubber material cannot ensure a discharge path, there is concern that noise may be generated due to discharge or that it may affect electronic devices (sensors, etc.) around the engine.

Method used

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  • Rubber composition for torsional vibration damper
  • Rubber composition for torsional vibration damper
  • Rubber composition for torsional vibration damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～17、 comparative example 1～7

[0065] In addition to the compounding contents of the polymer, carbon black, liquid polyolefin oligomer, graphite, aromatic modified terpene resin, and organic peroxide crosslinking agent shown in Tables 1 to 3, the above descriptions are also appropriately added The matching reagents are used to prepare the composition.

[0066] In this embodiment, in order to manufacture the rubber composition for a torsional vibration damper, first, an unvulcanized rubber composition is prepared. The rubber composition is prepared by kneading prescribed raw materials using a mixer such as an internal mixer, a kneader, or a Banbury mixer, or an open roll. Then, using a press vulcanizer, compression molding machine, injection molding machine, etc., the blanks prepared above were subjected to primary vulcanization at 180° C. for 6 minutes and secondary vulcanization at 150° C. for 5 hours to produce test pieces with a thickness of 2 mm.

[0067] Kneading and roll workability were evaluated by...

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Abstract

The present invention provides a rubber composition for a torsional vibration damper, 100 parts by weight of at least one copolymer rubber selected from the group consisting of an ethylene-propylene-non-conjugated diene ternary copolymer rubber, an ethylene-butylene-non-conjugated diene ternary copolymer rubber and an ethylene-propylene copolymer rubber, wherein the content of propylene or butylene in the total amount of ethylene and propylene or butylene is 35-55% by weight; the present invention relates to a polyolefin resin composition containing 10 parts by weight to 200 parts by weight of carbon black having an iodine adsorption amount of 100 mg / g to 600 mg / g, a DBP oil absorption amount of 138 cm < 3 > / 100 g to 330 cm < 3 > / 100 g, and a nitrogen adsorption specific surface area of 100 m < 2 > / g to 530 m < 2 > / g, and 5 parts by weight to 100 parts by weight of a liquid polyolefin oligomer having a number average molecular weight Mn of 3,000 to 4,000.

Description

technical field [0001] The invention relates to a rubber composition for a torsional vibration damper. In more detail, it relates to a rubber composition that can provide a torsional vibration damper exhibiting excellent attenuation, conductivity, and durability. Background technique [0002] The torsional vibration damper is installed at the position closest to the engine at one end of the crankshaft extending from the engine. The purpose is to reduce engine vibration (reduce the torsional vibration of the crankshaft). A vulcanized rubber layer is sandwiched between them, thereby exerting the function of vibration damping, etc. [0003] Specifically, examples include the function of reducing the vibration of the crankshaft by matching the natural frequency of the torsional vibration damper to the natural frequency of the crankshaft, and the function of transmitting power to auxiliary machinery via a belt. [0004] The rubber material used in the torsional vibration damper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/00C08K3/04C08K5/14F16F1/36
CPCC08L23/16C08L2205/025F16F1/3605C08K2201/001C08L23/00C08K3/04C08L2314/00F16F2228/001F16F2224/025F16F15/1442C08K2201/006C08K2201/014C08L23/22C08L91/00C08K5/14C08K3/042C08L2205/035
Inventor 根上哲郎
Owner NOK CORP
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