Title:
EPDM COMPOSITION FOR TORSIONAL DAMPERS
Document Type and Number:
WIPO Patent Application WO/2015/012018
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an EPDM composition for torsional dampers that is capable of achieving high attenuation and has well-balanced properties required for torsional dampers. Provided is an EPDM composition for torsional dampers, said EPDM composition comprising (a) an EPDM polymer, (b) a liquid polyolefin oligomer, and (c) a carbon black, and characterized by containing, per 100 parts by weight of the EPDM polymer (a) that has a propylene content of 35-50 wt% relative to the sum of the ethylene content and the propylene content thereof, 5-30 parts by weight of the liquid polyolefin oligomer (b) that has a number-average molecular weight (Mn) in the range of 3,000-4,000, and 10-120 parts by weight of the carbon black (c) that has a nitrogen adsorption specific surface area of 100-150 m2/g, an iodine adsorption amount of 110-160 mg/g and a DBP oil absorption amount of 70-135 cm3/100 g.
Inventors:
NEGAMI TETSURO (JP)
Application Number:
PCT/JP2014/065960
Publication Date:
January 29, 2015
Filing Date:
June 17, 2014
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
C08L23/16; C08K3/04; C08L23/02; C08L45/00; F16F15/126
Foreign References:
| JP2001064460A | 2001-03-13 | |||
| JPH0859924A | 1996-03-05 | |||
| JP2011105870A | 2011-06-02 | |||
| JP2007238649A | 2007-09-20 | |||
| JP2001181458A | 2001-07-03 | |||
| JPH10237225A | 1998-09-08 |
Attorney, Agent or Firm:
MARUYAMA EIICHI (JP)
Maruyama Eiichi (JP)
Maruyama Eiichi (JP)
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