公开(公告)号：US20240034819A1

公开(公告)日：2024-02-01

申请号：US18256667

申请日：2021-09-03

Applicant: Denka Company Limited

Inventor： Yushi KUMAGAI ,  Hidehiro MATSUDA ,  Misaki TADA ,  Gaito KIYOFUJI

IPC: C08F28/02 ,  C08C19/20 ,  C08J9/10 ,  A41D13/012

CPC classification number: C08F28/02 ,  C08C19/20 ,  C08J9/105 ,  A41D13/012 ,  C08J2311/00 ,  C08J2203/04

Abstract: A rubber material containing a sulfur-modified chloroprene polymer, in which a content X (% by mass) of sulfur constituting the sulfur-modified chloroprene polymer and a total amount Y (% by mass) of a conjugate resin acid and a salt of a conjugate resin acid, on the basis of a total amount of the rubber material, satisfy Expression (A) below, and the total amount Y is 1.00% by mass or more.


13.90X−5.10≤Y  (A)

公开(公告)号：US20240117161A1

公开(公告)日：2024-04-11

申请号：US18274370

申请日：2022-03-24

Applicant: DENKA COMPANY LIMITED

Inventor： Seiya TOMIZAWA ,  Wataru NISHINO ,  Misaki TADA

IPC: C08L11/02 ,  C08F2/22 ,  C08F236/18 ,  C09J111/02

CPC classification number: C08L11/02 ,  C08F2/22 ,  C08F236/18 ,  C09J111/02

Abstract: A chloroprene-based polymer latex including a chloroprene-based polymer, wherein: an amount of substance of alkali metal cation per unit mass in the chloroprene-based polymer latex is 0.05 to 0.12 mmol/g, when the chloroprene-based polymer latex is freeze-dried to obtain a solid content containing the chloroprene-based polymer, and an ethanol-toluene azeotropic mixture soluble content specified in JIS K 6229 is extracted by refluxing from the solid content to obtain an extract, and the obtained extract is acid treated with hydrochloric acid, an amount of rosin acid of in the solid content measured by gas chromatography is 1.4 to 4.2% by mass with respect to 100% by mass of the chloroprene-based polymer in the solid content, is provided.

公开(公告)号：US20240117083A1

公开(公告)日：2024-04-11

申请号：US18274281

申请日：2022-03-24

Applicant: DENKA COMPANY LIMITED

Inventor： Seiya TOMIZAWA ,  Wataru NISHINO ,  Misaki TADA

IPC: C08F36/18 ,  C08C4/00 ,  C08F2/22 ,  C08L11/02

CPC classification number: C08F36/18 ,  C08C4/00 ,  C08F2/22 ,  C08L11/02 ,  C08L2312/00

Abstract: A chloroprene-based polymer, wherein: a 1H-NMR spectrum of the chloroprene-based polymer measured in a deuterochloroform solvent has a peak at 5.80 to 6.00 ppm; when an area of the peak at 5.80 to 6.00 ppm is A and an area of a peak at 4.05 to 6.00 ppm is B, A/B is 1.20/100 or less; the 1H-NMR spectrum of the chloroprene-based polymer measured in a deuterochloroform solvent has a peak at 5.40 to 5.60 ppm; when an area of the peak at 5.40 to 5.60 ppm is D and the area of the peak at 4.05 to 6.00 ppm is B, D/B is 97.20/100 or less, is provided.