RUBBER COMPOSITION FOR TORSIONAL DAMPERS

Title:

RUBBER COMPOSITION FOR TORSIONAL DAMPERS

Document Type and Number:

WIPO Patent Application WO/2021/006018

Kind Code:

A1

Abstract:

A rubber composition for torsional dampers, which contains carbon black and a liquid polyolefin oligomer in amounts of 10 to 200 parts by weight and 5 to 100 parts by weight, respectively, relative to 100 parts by weight of at least one of an ethylene-propylene-nonconjugated diene terpolymer rubber, an ethylene-butene-nonconjugated diene terpolymer rubber and an ethylene-propylene copolymer rubber each of which contains propylene or butane in an amount of 35 to 55% by weight relative to the total amount of ethylene and propylene or butane, wherein the carbon black has a iodine adsorption amount of 100 to 600 mg/g, a DBP oil absorption amount of 138 to 330 cm3/100g and a nitrogen-adsorbing specific surface area of 100 to 530 m2/g, and the liquid polyolefin oligomer has a number average molecular weight Mn of 3,000 to 4,000.

Inventors:

NEGAMI TETSURO (JP)

Application Number:

PCT/JP2020/024298

Publication Date:

January 14, 2021

Filing Date:

June 22, 2020

Export Citation:

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Assignee:

NOK CORP (JP)

International Classes:

C08L23/00; C08K3/04; C08L23/16; C08L45/00; C08L65/00; F16F1/36

Domestic Patent References:

WO2015012018A1	2015-01-29
WO2018079076A1	2018-05-03
WO2013114869A1	2013-08-08
WO2015012018A1	2015-01-29

Foreign References:

JP2017183162A

2017-10-05

Other References: