Title:
ACRYLIC RUBBER, ACRYLIC RUBBER-CONTAINING COMPOSITION, AND CROSSLINKED RUBBER
Document Type and Number:
WIPO Patent Application WO/2021/201009
Kind Code:
A1
Abstract:
Upon discovering the issue that crosslinking shrinkage increases during crosslinking of acrylic rubber, the present invention was developed to address the problem of reducing the crosslinking shrinkage while maintaining good normal physical properties. In developing the present invention, it was discovered that the problem can be solved by causing a high molecular weight part and a low molecular weight part of the molecular weight distribution in acrylic rubber to have a specific distribution. Specifically, it was discovered that the problem can be solved by acrylic rubber 32-65% of which is accounted for by a part having a molecular weight of not more than 0.5 million and 3-20% of which is accounted for by a part having a molecular weight of not less than 2 million.
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Inventors:
MOROOKA YOSHIHIRO (JP)
MIKI SHOTA (JP)
KITAGAWA MOTOKI (JP)
MIKI SHOTA (JP)
KITAGAWA MOTOKI (JP)
Application Number:
PCT/JP2021/013650
Publication Date:
October 07, 2021
Filing Date:
March 30, 2021
Export Citation:
Assignee:
OSAKA SODA CO LTD (JP)
International Classes:
C08F220/26; C08L33/14
Domestic Patent References:
| WO2017122617A1 | 2017-07-20 |
Foreign References:
| JP2018168343A | 2018-11-01 | |||
| JP2009040922A | 2009-02-26 | |||
| JP2009040922A | 2009-02-26 |
Other References:
See also references of EP 4130067A4
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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