Title:
RUBBER COMPOSITION FOR DOWNHOLE TOOLS AND MEMBER FOR DOWNHOLE TOOLS
Document Type and Number:
WIPO Patent Application WO/2018/216334
Kind Code:
A1
Abstract:
Provided is a rubber composition for downhole tools which has superior decomposability and storability. This rubber composition for downhole tools contains a decomposable rubber, a decomposition-accelerating agent, and a decomposition-inhibiting agent. The decomposition-accelerating agent is at least one compound represented by formula (I) or (II). The decomposition-inhibiting agent is at least one selected from the group consisting of carbodiimide compounds, oxazoline compounds, oxazine compounds, and epoxy compounds. The contained amount of the decomposition-accelerating agent is 0.1-20 parts by mass with respect to 100 parts by mass of the decomposable rubber. The contained amount of the decomposition-inhibiting agent is 0.1-3 parts by mass with respect to 100 parts by mass of the decomposition rubber.
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Inventors:
KOBAYASHI FUMINORI (JP)
KOBAYASHI TAKUMA (JP)
SAIJO HIKARU (JP)
KOBAYASHI TAKUMA (JP)
SAIJO HIKARU (JP)
Application Number:
PCT/JP2018/011365
Publication Date:
November 29, 2018
Filing Date:
March 22, 2018
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C08L21/00; C08K5/11; C08K5/1515; C08K5/29; C08K5/35; C08K5/42; E21B23/00
Domestic Patent References:
| WO2015098803A1 | 2015-07-02 |
Foreign References:
| JP2015071714A | 2015-04-16 | |||
| JP2004526002A | 2004-08-26 | |||
| US20120267111A1 | 2012-10-25 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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