Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
NBR COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2019/102864
Kind Code:
A1
Abstract:
An NBR composition having added thereto 20–100 parts by weight heavy calcium carbonate, per 100 parts by weight NBR or hydrogenated NBR. If blistering occurs in a vulcanized rubber molded product such as a cylinder head gasket and if the rubber at the blistered location separates and enters the cooling system, the cooling system, etc., may become clogged and engine malfunction may occur. In products that have blistered, all cooling paths are peeled off using a water jet. However a vulcanized product obtained using this NBR composition improves blistering resistance without losing wear resistance.

Inventors:
WATANABE Isao (Tsujidoshinmachi 4-chome Fujisawa-sh, Kanagawa 42, 〒2510042, JP)
TAKEKAWA Daiki (Tsujidoshinmachi 4-chome Fujisawa-sh, Kanagawa 42, 〒2510042, JP)
Application Number:
JP2018/041525
Publication Date:
May 31, 2019
Filing Date:
November 08, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NOK CORPORATION (12-15, Shibadaimon 1-chome Minato-k, Tokyo 85, 〒1058585, JP)
International Classes:
C08L9/02; C08K3/26; F16J15/08
Domestic Patent References:
WO2006080486A12006-08-03
WO2015045513A12015-04-02
Foreign References:
JPH10237229A1998-09-08
JP2004078127A2004-03-11
JP2008179663A2008-08-07
Attorney, Agent or Firm:
YOSHIDA Toshio et al. (YOSHIDA PATENT OFFICE No.401, Esty Maison Shirokanedai Bldg. 1-4, Kami-Osaki 1-chome, Shinagawa-k, Tokyo 21, 〒1410021, JP)
Download PDF: