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Title:
ACRYLIC RUBBER BALE HAVING EXCELLENT WORKABILITY AND WATER RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2021/014790
Kind Code:
A1
Abstract:
Provided are: an acrylic rubber bale and a method for manufacturing the same, the acrylic rubber bale having markedly improved storage stability and water resistance without compromising strength characteristics and other crosslinking physical properties; a rubber mixture and a method for manufacturing the same, the rubber mixture being obtained by mixing the acrylic rubber bale; and a crosslinked rubber obtained by crosslinking the rubber mixture. An acrylic rubber bale pertaining to the present invention comprises an acrylic rubber having a (meth)acrylic acid ester as a main component thereof, a weight-average molecular weight (Mw) of 100,000-5,000,000, and a ratio (Mz/Mw) of the z-average molecular weight (Mz) and the weight-average molecular weight (Mw) of 1.3 or greater, the ash content of the acrylic rubber bale being 0.6 wt% or less, phosphorus and a group 2 metal of the periodic table being included in the ash content, the phosphorus content being 10 wt% or greater, and the ratio ([Periodic table group 2 metal]/[P]) of the group 2 metal of the periodic table and phosphorus being in the range of 0.6-2 in terms of mole ratio.

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Inventors:
MASUDA HIROFUMI (JP)
KAWANAKA TAKAFUMI (JP)
Application Number:
PCT/JP2020/022313
Publication Date:
January 28, 2021
Filing Date:
June 05, 2020
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
C08F6/22; C08F2/24; C08F20/12; C08J3/16; C08J5/18; C08K3/011; C08K3/013; C08K3/02; C08L33/08
Domestic Patent References:
WO2016002936A12016-01-07
WO2018079787A12018-05-03
WO2018116828A12018-06-28
WO2018079783A12018-05-03
WO2018101146A12018-06-07
WO2018143101A12018-08-09
Foreign References:
JP3949975B22007-07-25
JP2004131654A2004-04-30
JP2004143323A2004-05-20
JP2006328239A2006-12-07
JPS4815990A
Other References:
See also references of EP 4001320A4
Attorney, Agent or Firm:
ARIGA, Eiichiro et al. (JP)
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