Title:
NBR COMPOSITION AND BUFFER MATERIAL USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/199868
Kind Code:
A1
Abstract:
Provided is a NBR composition that excels in terms of rubber material workability and vulcanized rubber hardness and contains, for every 100 parts by weight of NBR, 93-105 parts by weight of carbon black having a carbon black grade of N330 or N550, 1.0-4.0 parts by weight of a vulcanization retarder, 2.0-5.0 parts by weight of a thiazole-based and a thiuram-based vulcanization accelerator, and 1.0-4.0 parts by weight of a sulfur-based vulcanization agent. A vulcanized molded product obtained from said NBR composition has a rubber hardness (Duro A, instantaneous) of at least 85 as measured in accordance with JIS K 6253, which corresponds to ISO 18517, and can be used effectively as a vehicle buffer material in a stopper, etc., for electric power steering, a buffer material for a nailing device, a buffer material in a device that comprises a hydraulic cylinder, and so on.
Inventors:
MIYOSHI YUJI (JP)
Application Number:
PCT/JP2021/008196
Publication Date:
October 07, 2021
Filing Date:
March 03, 2021
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
C08K5/375; C08K3/04; C08K5/40; C08L9/02
Foreign References:
| JP2014159506A | 2014-09-04 | |||
| JPS63178148A | 1988-07-22 | |||
| JP2007291295A | 2007-11-08 | |||
| JP6045935B2 | 2016-12-14 |
Attorney, Agent or Firm:
YOSHIDA Kazuko et al. (JP)
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