Title:
シール材
Document Type and Number:
Japanese Patent JP6843265
Kind Code:
B2
Abstract:
A hydrogenated NBR composition which is obtained by blending 5-50 parts by weight of an ester-based plasticizer that has a freezing point of -40°C or less and a molecular weight of 500-1,000 and 1-10 parts by weight of an organic peroxide per 100 parts by weight of a hydrogenated NBR that has an acrylonitrile content of 15-22%. This hydrogenated NBR composition provides a sealing material which is suitable for applications in contact with R32 coolant, while achieving a good balance between excellent cold resistance and heat resistance, and which is capable of maintaining sufficient sealing properties even in a low-temperature environment at -40°C or less. A sealing material which is formed from this hydrogenated NBR composition has a TR-10 value of -36°C or less in a low-temperature elasticity recovery test, and a G25 O-ring thereof has a compression set of 34% or less after 70 hours at 120°C.
Inventors:
Kei Sekiguchi
Application Number:
JP2019549227A
Publication Date:
March 17, 2021
Filing Date:
October 10, 2018
Export Citation:
Assignee:
NOK CORPORATION
International Classes:
C08L9/02; C08K5/10; C08K5/14; C09K3/10; F16J15/10
Domestic Patent References:
| JP2005285537A |
Foreign References:
| WO2017022598A1 | ||||
| WO2015080130A1 |
Attorney, Agent or Firm:
Toshio Yoshida
Kazuko Yoshida
Kazuko Yoshida