公开(公告)号：US10287382B2

公开(公告)日：2019-05-14

申请号：US15556900

申请日：2016-03-11

Applicant: ZEON CORPORATION

Inventor： Shiho Mosaki ,  Sayaka Inoue

IPC: C08L13/00 ,  C08F236/14 ,  C08F236/12 ,  C08K3/36 ,  C08K5/17 ,  C08L9/02 ,  C08K3/34 ,  C08K5/5435

Abstract: A nitrile rubber composition comprising a carboxyl group-containing highly saturated nitrile rubber containing α,β-ethylenically unsaturated nitrile monomer units in a ratio of 5 to 60 wt % and having an iodine value of 120 or less, a filler, and a polyamine-based cross-linking agent, wherein a content of the filler is 100 parts by weight or more and less than 200 parts by weight with respect to 100 parts by weight of the carboxyl group-containing highly saturated nitrile rubber. Accordingly a nitrile rubber composition able to give a cross-linked rubber with excellent in original state physical properties, compression set resistance, and sour gasoline resistance and small in tension set is provided.

公开(公告)号：US11498990B2

公开(公告)日：2022-11-15

申请号：US16494706

申请日：2018-03-02

Applicant: ZEON CORPORATION

Inventor： Shiho Mosaki

IPC: C08F236/12 ,  C08F220/18 ,  C08K5/17 ,  C08L33/18 ,  C08L79/02

Abstract: A crosslinkable rubber composition includes a carboxyl group-containing nitrile rubber (A); a carboxyl group-containing acrylic rubber (B); and a polyamine-based crosslinking agent (C), where a ratio of a weight of the carboxyl group-containing nitrile rubber (A) to a weight of the carboxyl group-containing acrylic rubber (B) is from 5:95 to 95:5. The carboxyl group-containing nitrile rubber (A) includes 5 to 60% by weight of α,β-ethylenically unsaturated nitrile monomer units, and α,β-ethylenically unsaturated monocarboxylic acid ester monomer units. The carboxyl group-containing nitrile rubber (A) has an iodine value of 120 or less.

公开(公告)号：US10787525B2

公开(公告)日：2020-09-29

申请号：US15775781

申请日：2016-11-16

Applicant: ZEON CORPORATION

Inventor： Shiho Mosaki

IPC: C08K9/06 ,  C08C19/36 ,  C08K5/17 ,  C09K3/10 ,  C08L13/00 ,  C08K5/00 ,  C08K3/34

Abstract: A cross-linked rubber prepared by cross-linking a nitrile rubber composition including: a carboxyl group-containing highly saturated nitrile rubber containing 5 to 60 wt % of an α,β-ethylenically unsaturated nitrile monomer unit, and an α,β-ethylenically unsaturated monocarboxylic acid ester monomer unit, and having an iodine value of 120 or less; a surface treated silicate; and a polyamine-based cross-linking agent wherein a content is 0.1 to 20 parts by weight with respect to 100 parts by weight of the carboxyl group-containing highly saturated nitrile rubber, wherein when the rubber is subjected to a compression stress relaxation test wherein it is maintained at 150° C. while being compressed by 25%, the time until which the compression stress comes to be 50% of the initial compression stress at the start of the test, the compression stress after 30 minutes from the start of the test, is 300 hours or more.