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Title:
ACRYLIC RUBBER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2021/149443
Kind Code:
A1
Abstract:
An acrylic rubber composition according to the present invention is obtained by blending 5-15 parts by weight of a plasticizer having a solubility parameter SP value (using the Small method) of 8.5-10.5 into 100 parts by weight of an ultra-cold grade acrylic rubber having a glass transition temperature of -42℃ or lower, and achieves a vulcanizate having a TR10 value, which is an index of cold resistance, of -42℃ or lower both initially and after immersion in oil. In this acrylic rubber composition, by first adjusting the ratio of acrylic monomers constituting the acrylic rubber, maintaining low-temperature characteristics becomes possible even in an oil-contact environment. This reduces the oil-resistance of a vulcanized rubber molded article, thereby increasing the swelling amount of oil into the vulcanized rubber molded article, which improves flexibility in low-temperature environments.

Inventors:
OTANI KEITA (JP)
ANZAI TAKAHIRO (JP)
Application Number:
PCT/JP2020/048092
Publication Date:
July 29, 2021
Filing Date:
December 23, 2020
Export Citation:
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Assignee:
NOK CORP (JP)
International Classes:
C08F218/02; C08F218/14; C08F220/10; C08K5/10; C08L33/04; C09K3/10
Domestic Patent References:
WO2005082960A12005-09-09
WO2019044592A12019-03-07
WO2018180207A12018-10-04
WO2016136697A12016-09-01
Foreign References:
JP2006193559A2006-07-27
JPH08301942A1996-11-19
JPH11140264A1999-05-25
JPH06345931A1994-12-20
JP2010270173A2010-12-02
JPH06145257A1994-05-24
JP2019110275A2019-07-04
Other References:
See also references of EP 4095171A4
Attorney, Agent or Firm:
YOSHIDA Kazuko et al. (JP)
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