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：US20240309197A1

公开(公告)日：2024-09-19

申请号：US18277869

申请日：2022-03-23

Applicant: DENKA COMPANY LIMITED

Inventor： Gaito KIYOFUJI ,  Seiya TOMIZAWA ,  Naoki KOBAYASHI

IPC: C08L47/00

CPC classification number: C08L47/00 ,  C08L2201/52

Abstract: A method for producing a chloroprene-based polymer composition including a polymerization step, wherein chloroprene, or chloroprene and a monomer copolymerizable with chloroprene are polymerized; and includes monomer and emulsifier addition steps, when a total amount of monomer used in the polymerization step is 100%, an initial addition amount of monomer at start of polymerization is X %; in the monomer addition step, when the initial addition amount of the monomer is 100%, a remaining monomer is added to the polymerization system from time when polymerization progresses and Y % of the monomer initially added converts, by reaching the polymerization completion conversion; in the emulsifier addition step, when the total amount of monomer used in the polymerization step is 100%, emulsifier is added from time when polymerization progresses and Z % of the monomer converts by reaching the polymerization completion conversion; and X, Y and Z satisfy following relationship, 1

公开(公告)号：US20190309195A1

公开(公告)日：2019-10-10

申请号：US16315414

申请日：2017-06-29

Applicant: DENKA COMPANY LIMITED

Inventor： Gaito KIYOFUJI ,  Masao ONOZUKA ,  Manabu MIZUSHIMA ,  Shogo HAGIWARA ,  Hironori KONISHI ,  Daisuke SHIMIYA ,  Kazuhiro KOTE

IPC: C09J111/02 ,  C09J11/04 ,  C09J11/06

Abstract: A latex composition gives favorable initial adhesive strength after short drying period, shows storage stability and spray coating characteristics and gives a soft adhesive layer after drying and a one-pack type aqueous adhesive. The latex composition includes a chloroprene-based polymer latex (A) containing a chloroprene-based polymer in an amount of 50 to 85 mass % as solid matter and an acrylic polymer latex (B) having a glass transition temperature of −52 to −9° C. and containing an acrylic polymer containing a sodium alkylbenzenesulfonate having a structure represented by the Chemical Formula (1) in an amount of 15 to 50 mass % as solid matter, in a total amount of 100 parts by mass, and additionally at least one pH regulator (C) selected from boric acid, ammonium sulfate, and amino acids having an isoelectric point of 5.5 to 6.5 in an amount of 3 to 13 parts by mass as solid matter.