公开(公告)号：US10556997B2

公开(公告)日：2020-02-11

申请号：US15549921

申请日：2016-02-23

Applicant: ZEON CORPORATION

Inventor： Nobuyoshi Emori ,  Tomonori Ogawa ,  Takanori Arakawa

IPC: C08J3/24 ,  C08F220/12 ,  C08L33/10

Abstract: A cross-linked rubber product is obtained by cross-linking an acrylic elastomer composition containing an acrylic elastomer obtained by copolymerization of an acrylate and a cross-linking site monomer. The molar fraction of an oxygen atom (a) in the acrylic elastomer is 11.3 mol % or less, the molar fraction of a nitrogen atom (b) in the acrylic elastomer is 0.5 mol % or less, and a volume change is from −3 to 6% when the cross-linked rubber product is dipped in distilled water at 80° C. for 200 hours.

公开(公告)号：US09840572B2

公开(公告)日：2017-12-12

申请号：US15320203

申请日：2015-07-03

Applicant: ZEON CORPORATION ,  HONDA MOTOR CO., LTD.

Inventor： Nobuyoshi Emori ,  Tomonori Ogawa ,  Takanori Arakawa ,  Takayuki Kogure ,  Kazutaka Yokoyama ,  Ryosuke Kodaira

IPC: C08F220/18 ,  C08K5/205 ,  C08K5/378 ,  C09K3/10 ,  F16J15/02 ,  F16J15/3284

CPC classification number: C08F220/18 ,  C08F120/10 ,  C08F2220/1825 ,  C08K5/17 ,  C08K5/205 ,  C08K5/3492 ,  C08K5/378 ,  C08L33/08 ,  C09K3/10 ,  C09K2003/1068 ,  C09K2003/1087 ,  C09K2200/0607 ,  C09K2200/0625 ,  F16J15/022 ,  F16J15/3284

Abstract: An acrylic rubber contains (a) methyl methacrylate units, (b) ethyl acrylate units, (c) n-butyl acrylate units, (d) 2-methoxyethyl acrylate units, and (e) cross-linking site monomer units, in which the acrylic rubber contains 10 to 20% by weight of (a) the methyl methacrylate units, 15% by weight or less of (b) the ethyl acrylate units, 60 to 80% by weight of (c) the n-butyl acrylate units, 10 to 30% by weight of (d) the 2-methoxyethyl acrylate units, and 0.5 to 5% by weight of (e) the cross-linking site monomer units.

公开(公告)号：US09932434B2

公开(公告)日：2018-04-03

申请号：US15325626

申请日：2015-07-30

Applicant: ZEON CORPORATION

Inventor： Sayaka Inoue ,  Nobuyoshi Emori

IPC: C08F236/12 ,  C08J3/24 ,  C08F220/18 ,  C08K5/14 ,  C08F220/44 ,  C08L9/02

CPC classification number: C08F236/12 ,  C08F220/18 ,  C08F220/44 ,  C08F2220/1825 ,  C08K5/14 ,  C08L9/02

Abstract: A nitrile group-containing copolymer rubber contains α,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt % and has a Z-average radius of gyration of 100 nm or more. Preferably, the nitrile group-containing copolymer rubber has an iodine value of 120 or less. Further, preferably, the nitrile group-containing copolymer rubber has a plasticity number of 14 to 90. It is possible to provide a nitrile group-containing copolymer rubber able to give a cross-linked rubber excellent in tensile stress, compression set resistance, and low heat buildup property.