公开(公告)号：US20230087679A1

公开(公告)日：2023-03-23

申请号：US17795035

申请日：2021-01-20

Applicant: Denka Company Limited

Inventor： Tatsuya NAKANO ,  Tatsunori HORIGUCHI ,  Takashi KAWASAKI ,  Toshiaki MIYAUCHI

IPC: C08F220/18

Abstract: One aspect of the present invention is an acrylic rubber containing ethyl acrylate and n-butyl acrylate as monomer units and containing a toluene-insoluble component, wherein a mass ratio of a content of the ethyl acrylate to a content of the n-butyl acrylate is 2 or more, and a content of the toluene-insoluble component is 5% by mass or less based on a total amount of the acrylic rubber.

公开(公告)号：US20190300633A1

公开(公告)日：2019-10-03

申请号：US16307845

申请日：2017-06-27

Applicant: DENKA COMPANY LIMITED ,  INDIAN INSTITUTE OF TECHNOLOGY KHARAGPUR

Inventor： Tatsuya NAKANO ,  Takashi KAWASAKI ,  Toshiaki MIYAUCHI ,  Tatsunori HORIGUCHI ,  Tuhin SAHA ,  Anil K. BHOWMICK

IPC: C08F220/12 ,  C08K3/34 ,  C09K3/10 ,  F16L11/04 ,  G10K11/162

Abstract: Provided are an acrylic rubber composition having higher tensile properties and higher heat resistance and a vulcanizate thereof. An acrylic rubber composition includes 1 to 25 parts by mass of a layered clay mineral relative to 100 parts by mass of an acrylic rubber. The acrylic rubber is a copolymer of a (meth)acrylic acid alkyl ester and a curesite monomer.

公开(公告)号：US20230265228A1

公开(公告)日：2023-08-24

申请号：US17767982

申请日：2020-07-06

Applicant: Denka Company Limited

Inventor： Tatsuya NAKANO ,  Toshiaki MIYAUCHI

IPC: C08F220/18 ,  C08F220/32 ,  C08F210/02 ,  F16L11/04

CPC classification number: C08F220/1802 ,  C08F210/02 ,  C08F220/325 ,  C08F220/1804 ,  F16L11/04

Abstract: An aspect of the present invention is an acrylic rubber containing only an alkyl acrylate, ethylene and a crosslinking monomer as monomer units, wherein a content of a polyvinyl alcohol in the acrylic rubber is 0.5 to 2% by mass.

公开(公告)号：US20220389201A1

公开(公告)日：2022-12-08

申请号：US17829494

申请日：2022-06-01

Applicant: Denka Company Limited

Inventor： Tatsuya NAKANO ,  Yuya KAMBE ,  Toshiaki MIYAUCHI

IPC: C08L13/00

Abstract: An acrylic rubber composition containing: an acrylic rubber containing 100 parts by mass of an alkyl acrylate and 30 to 60 parts by mass of an alkyl methacrylate, as monomer units; a carbon black; a crosslinking agent; and a crosslinking accelerator.

公开(公告)号：US20230056141A1

公开(公告)日：2023-02-23

申请号：US17768001

申请日：2020-07-06

Applicant: Denka Company Limited

Inventor： Tatsuya NAKANO ,  Toshiaki MIYAUCHI

IPC: C08F220/18

Abstract: An aspect of the present invention is an acrylic rubber containing an alkyl acrylate, an alkyl methacrylate and ethylene as monomer units, wherein a content of a polyvinyl alcohol in the acrylic rubber is 0.5 to 2% by mass.

公开(公告)号：US20220363793A1

公开(公告)日：2022-11-17

申请号：US17764827

申请日：2020-09-24

Applicant: Denka Company Limited

Inventor： Yuya KAMBE ,  Toshiaki MIYAUCHI

IPC: C08F220/12 ,  C08K3/04 ,  C08K5/00

Abstract: An acrylic rubber containing: an alkyl acrylate unit; a crosslinking monomer unit; a unit of a bifunctional monomer represented by the following formula (A-1): wherein n represents 1 to 9, R1 represents a hydrogen atom or a methyl group, and R2 represents an alkanediyl group having 2 to 4 carbon atoms; and an ethylene unit, wherein the acrylic rubber has a toluene insoluble content of 4 to 40% by mass.

公开(公告)号：US20220064430A1

公开(公告)日：2022-03-03

申请号：US17417273

申请日：2019-11-25

Applicant: DENKA COMPANY LIMITED

Inventor： Tatsuya NAKANO ,  Toshiaki MIYAUCHI

IPC: C08L33/12 ,  C08F220/18 ,  C08F222/14 ,  C08F226/02 ,  C08F210/02 ,  C08K3/04 ,  C08K5/18 ,  C08K5/00 ,  F16L11/04

Abstract: A crosslinkable rubber composition, comprising: an acrylic rubber; an amine compound represented by the following formula (A-1); a carbon black; and a crosslinking agent, wherein the acrylic rubber has acrylate units and carboxy group-containing monomer units, and has 0.5 to 10 parts by mass of ethylene units with respect to 100 parts by mass of the acrylate units and/or 5 to 20 parts by mass of alkyl methacrylate units with respect to 100 parts by mass of the acrylate units, wherein R1 represents a hydrogen atom or an amino group in the formula (A-1).

公开(公告)号：US20230059217A1

公开(公告)日：2023-02-23

申请号：US17767966

申请日：2020-07-06

Applicant: Denka Company Limited

Inventor： Tatsuya NAKANO ,  Toshiaki MIYAUCHI

IPC: C08L33/08

Abstract: An aspect of the present invention is an acrylic rubber containing an alkyl acrylate, ethylene and vinyl acetate as monomer units, wherein a content of a polyvinyl alcohol in the acrylic rubber is 0.5 to 2% by mass.

公开(公告)号：US20230013290A1

公开(公告)日：2023-01-19

申请号：US17781418

申请日：2020-12-03

Applicant: Denka Company Limited

Inventor： Tatsuya NAKANO ,  Yuya KAMBE ,  Toshiaki MIYAUCHI

IPC: C08F220/18 ,  C08L33/08

Abstract: An acrylic rubber containing 100 parts by mass of an alkyl acrylate and 30 parts by mass or more of an alkyl methacrylate, as monomer units.

公开(公告)号：US20200332039A1

公开(公告)日：2020-10-22

申请号：US16754093

申请日：2018-10-15

Applicant: DENKA COMPANY LIMITED

Inventor： Tatsuya NAKANO ,  Toshiaki MIYAUCHI ,  Takashi KAWASAKI

IPC: C08F220/14 ,  C08K3/04 ,  C08L33/08

Abstract: A method for producing an acrylic rubber, the method including dividedly adding 80% to 100% by mass of the total mass of a monomer component containing 100 parts by mass of an acrylic acid alkyl ester having an alkyl group having 1 to 3 carbon atoms, 20 to 160 parts by mass of an acrylic acid alkyl ester having an alkyl group having 4 to 8 carbon atoms, and 0.1 to 10 parts by mass of a crosslinking seat monomer containing a carboxyl group, and performing emulsion polymerization at a polymerization temperature of 20° C. to 60° C. The monomer component may further contain a methacrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms, and ethylene.