公开(公告)号：US20220213235A1

公开(公告)日：2022-07-07

申请号：US17609987

申请日：2020-05-08

Applicant: Denka Company Limited

Inventor： Atsunori KONDO ,  Takashi SUNADA

IPC: C08C19/20 ,  C08L11/00 ,  C08K5/3445 ,  C08K5/47

Abstract: A sulfur-modified chloroprene rubber having a functional group A represented by specific General Formula (A) and positioned at a molecular terminal and a functional group B represented by specific General Formula (B) and positioned at a molecular terminal, in which a mass ratio B/A of a content of the functional group B with respect to a content of the functional group A is more than 0 and 6.00 or less, and a total amount of the functional group A and the functional group B is 0.10 to 0.60% by mass.

公开(公告)号：US20230383082A1

公开(公告)日：2023-11-30

申请号：US18249839

申请日：2021-09-10

Applicant: Denka Company Limited

Inventor： Atsunori KONDO ,  Takashi SUNADA

IPC: C08J9/06 ,  C08J9/00 ,  C08J9/228

CPC classification number: C08J9/06 ,  C08J9/0033 ,  C08J9/228 ,  C08J2311/00

Abstract: A rubber foam composition containing a sulfur-modified chloroprene rubber and a chemical foaming agent, in which the sulfur-modified chloroprene rubber has a functional group A represented by specific General Formula (A) and positioned at a molecular terminal, in the sulfur-modified chloroprene rubber, a mass ratio B/A of a content of a functional group B represented by specific General Formula (B) and positioned at a molecular terminal with respect to a content of the functional group A is 12.00 or less, a total amount of the functional group A and the functional group B is 0.10 to 1.00% by mass, and a content of the chemical foaming agent is 3 to 16 parts by mass with respect to a total of 100 parts by mass of the sulfur-modified chloroprene rubber, a thiazole compound, and a dithiocarbamic acid-based compound.

公开(公告)号：US20220002526A1

公开(公告)日：2022-01-06

申请号：US17291386

申请日：2019-11-06

Applicant: DENKA COMPANY LIMITED

Inventor： Atsunori KONDO ,  Takashi SUNADA

IPC: C08L11/00 ,  C08K5/47 ,  C08K5/38 ,  C08L33/20

Abstract: A chloroprene rubber composition containing 100 parts by mass of a chloroprene-based rubber, 0.5 to 5.0 parts by mass of a sulfur-based compound represented by General Formula (1) below, and more than 0 parts by mass and 2.0 parts by mass or less of a xanthogen disulfide compound represented by General Formula (2) below. [In the formula, R1 represents a hydrogen atom, a hydroxyl group, or an alkyl group having 1 to 8 carbon atoms, and R2 and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.] [In the formula, R4 and R5 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.]

公开(公告)号：US20210292524A1

公开(公告)日：2021-09-23

申请号：US17261960

申请日：2019-07-11

Applicant: DENKA COMPANY LIMITED

Inventor： Takashi SUNADA ,  Hiroyuki ISHIGURO ,  Yasushi ABE

IPC: C08L11/02 ,  C08L33/20

Abstract: A rubber composition from which a vulcanized rubber simultaneously improved in three characteristics of oil resistance, cold resistance and ozone resistance can be obtained, and a molded article using the vulcanized rubber are provided. The rubber composition contains 50 to 99 parts by mass of a chloroprene rubber containing 0.01 to 20% by mass of an unsaturated nitrile monomer unit and 1 to 50 parts by mass of a non-conjugated diene rubber.

公开(公告)号：US20170211288A1

公开(公告)日：2017-07-27

申请号：US15515394

申请日：2015-09-29

Applicant: DENKA COMPANY LIMITED

Inventor： Yasushi KAMIHIGASHI ,  Shinichirou KUMAGAI ,  Takumi NISHIMURA ,  Koji FUJITA ,  Takehiro TOMITA ,  Tatsuji MATSUMOTO ,  Yasuhiko KONDO ,  Yasuchika ITO ,  Takashi SUNADA ,  Nobuhiko FUJII ,  Hideki TOYA ,  Yasushi ABE

IPC: E04H9/02 ,  B32B7/12 ,  E01D19/04 ,  F16F15/08 ,  E04B1/36 ,  E04B1/98 ,  B32B25/04 ,  B32B27/32

CPC classification number: E04H9/022 ,  B32B7/12 ,  B32B9/005 ,  B32B9/043 ,  B32B15/06 ,  B32B15/18 ,  B32B25/04 ,  B32B25/08 ,  B32B25/12 ,  B32B25/14 ,  B32B25/16 ,  B32B25/18 ,  B32B27/06 ,  B32B27/32 ,  B32B2250/42 ,  B32B2264/104 ,  B32B2264/108 ,  B32B2270/00 ,  B32B2307/51 ,  B32B2307/536 ,  B32B2307/54 ,  B32B2307/542 ,  B32B2307/70 ,  B32B2307/732 ,  B32B2419/00 ,  E01D19/041 ,  E04B1/36 ,  E04B1/98 ,  F16F1/3605 ,  F16F1/40 ,  F16F15/08 ,  F16F2224/025

Abstract: Provided is a rubber bearing formed from a polychloroprene composition and having higher ozone resistance.The rubber bearing comprises a laminate prepared by alternately laminating a plurality of soft layers having rubber elasticity and a plurality of hard layers having rigidity, and a covering layer covering an outer peripheral part of the laminate. The soft layer comprises a rubber composition containing a polychloroprene, and the covering layer comprises a blend rubber composition containing 30 to 95 parts by mass of a polychloroprene and 70 to 5 parts by mass of an elastomer other than the polychloroprene.