公开(公告)号：US20240294741A1

公开(公告)日：2024-09-05

申请号：US18550502

申请日：2022-03-07

Applicant: Denka Company Limited

Inventor： Misaki ITO ,  Masahiro KATO ,  Yushi KUMAGAI

IPC: C08L11/02 ,  B29C41/14 ,  B29K105/00 ,  B29K105/16 ,  C08J5/02

CPC classification number: C08L11/02 ,  C08J5/02 ,  B29C41/14 ,  B29K2011/00 ,  B29K2105/0064 ,  B29K2105/0088 ,  B29K2105/16 ,  B29K2995/0088 ,  C08J2311/02 ,  C08J2411/02 ,  C08L2203/02 ,  C08L2205/025

Abstract: A chloroprene polymer latex composition being a mixture of a chloroprene polymer latex A and a chloroprene polymer latex B, in which a 2,3-dichloro-1,3-butadiene copolymerized amount in a chloroprene polymer of the chloroprene polymer latex B is 3% by mass or more, a toluene insoluble content of the chloroprene polymer of the chloroprene polymer latex B is 70% by mass or more, a weight average molecular weight of a toluene soluble content in the chloroprene polymer latex A is 5,000 to 250,000, and a specific mass ratio b/a is 0.10 or more.

公开(公告)号：US20240294742A1

公开(公告)日：2024-09-05

申请号：US18550612

申请日：2022-03-07

Applicant: Denka Company Limited

Inventor： Misaki ITO ,  Masahiro KATO ,  Yushi KUMAGAI

IPC: C08L11/02 ,  B29C41/14 ,  B29K105/00 ,  B29K105/16 ,  C08F236/18 ,  C08J5/02 ,  C08K3/22 ,  C08L93/04

CPC classification number: C08L11/02 ,  C08F236/18 ,  C08J5/02 ,  C08K3/22 ,  C08L93/04 ,  B29C41/14 ,  B29K2011/00 ,  B29K2105/0002 ,  B29K2105/0064 ,  B29K2105/0085 ,  B29K2105/16 ,  B29K2995/0077 ,  B29K2995/0081 ,  C08J2311/02 ,  C08J2493/04

Abstract: A chloroprene polymer latex containing: a chloroprene polymer, at least one selected from the group consisting of rosin acid, sodium rosinate, and potassium rosinate; and at least one selected from the group consisting of sodium hydroxide and potassium hydroxide, in which a toluene insoluble content of the chloroprene polymer is 10% by mass or less, and a weight average molecular weight of a toluene soluble content is 5,000 to 200,000.

公开(公告)号：US20240294686A1

公开(公告)日：2024-09-05

申请号：US18550565

申请日：2022-03-16

Applicant: Denka Company Limited

Inventor： Misaki ITO ,  Masahiro KATO ,  Yushi KUMAGAI

IPC: C08F236/18 ,  C08F2/38

CPC classification number: C08F236/18 ,  C08F2/38

Abstract: A chloroprene polymer containing at least one selected from the group consisting of a homopolymer of chloroprene and a copolymer of chloroprene with 2,3-dichloro-1,3-butadiene, in which in gel permeation chromatography measurement of a toluene soluble content, the chloroprene polymer has a first peak having a weight average molecular weight of 500,000 to 900,000 and a second peak having a weight average molecular weight of 7,000 to 80,000, and a toluene insoluble content is 60% by mass or more.

公开(公告)号：US20240034862A1

公开(公告)日：2024-02-01

申请号：US18256692

申请日：2021-10-01

Applicant: Denka Company Limited

Inventor： Masahiro KATO ,  Misaki ITO ,  Yushi KUMAGAI ,  Yutaka SAITO

IPC: C08L9/00 ,  C08J5/02

CPC classification number: C08L9/00 ,  C08J5/02

Abstract: A method for producing a chloroprene polymer composition containing a chloroprene polymer, the method including: a polymerization step of polymerizing a monomer containing chloroprene at a polymerization rate of 20% or more to obtain a polymer composition containing a chloroprene polymer; and a mixing step of mixing the polymer composition with a rosin containing at least one conjugate resin acid component selected from the group consisting of abietic acid, neoabietic acid, palustric acid, levopimaric acid, and salts thereof, in which a mixed amount of the rosin in the mixing step is more than 0 parts by mass and 23 parts by mass or less with respect to 100 parts by mass of solid content of the polymer composition.

公开(公告)号：US20190077893A1

公开(公告)日：2019-03-14

申请号：US16064703

申请日：2016-10-25

Applicant: Denka Company Limited

Inventor： Yushi KUMAGAI ,  Masaru HASEGAWA ,  Tetsuo NOGUCHI

IPC: C08F212/08 ,  C08F212/34 ,  C08F210/02 ,  A61L31/04

Abstract: [Problem] To provide a cross-polymer having excellent softness, tensile properties, transparency and anti-blocking properties, and a medical single-layer tube using the same. [Solution] A cross-copolymer containing, by 75-95 mass %, main chains comprising aromatic vinyl/olefin-based copolymers comprising 8.99-15.99 mol % of aromatic vinyl monomer units, 84-91 mol % of olefin monomer units and 0.01-0.5 mol % of aromatic polyene monomer units; and by 5-25 mass %, cross-chains comprising polymers comprising aromatic vinyl monomer units; wherein, based on differential scanning calorimetry (DSC) in which the cross-copolymer is cooled to −50° C. in a 30 mL/min nitrogen flow, then heated to 180° C. at a temperature increase rate of 10° C./min, re-cooled to −50° C., and heated to 180° C. at a temperature increase rate of 10° C./min, the cross-copolymer has a top temperature of melting peak of 60-80° C., and a heat of fusion of 45-75 J/g, as calculated from the area of the DSC curve between −20° C. and 130° C. by using a straight line drawn between points on the DSC curve at −20° C. and 130° C.

公开(公告)号：US20250034371A1

公开(公告)日：2025-01-30

申请号：US18687495

申请日：2022-09-09

Applicant: Denka Company Limited

Inventor： Masahiro KATO ,  Yushi KUMAGAI ,  Misaki ITO

IPC: C08L9/04 ,  C08F2/26 ,  C08F2/38 ,  C08F220/06 ,  C08F236/18 ,  C08K3/22

Abstract: Provided is a polymer latex composition capable of obtaining a dip-molded body having excellent flexibility, breaking elongation, and breaking strength.
A polymer latex composition including a carboxy-modified acrylonitrile-butadiene copolymer (A), a carboxy-modified chloroprene copolymer (B), and a metal oxide (C), wherein a component ratio (A)/(B) of the carboxy-modified acrylonitrile-butadiene copolymer (A) and the carboxy-modified chloroprene copolymer (B) in the polymer latex composition is 90/10 to 50/50.

公开(公告)号：US20240352175A1

公开(公告)日：2024-10-24

申请号：US18686594

申请日：2022-09-21

Applicant: DENKA COMPANY LIMITED

Inventor： Wataru NISHINO ,  Ibuki SHIMOTOMAI ,  Yutaka SAITO ,  Yushi KUMAGAI

IPC: C08F293/00 ,  C08K5/05

CPC classification number: C08F293/005 ,  C08K5/05 ,  C08F2438/03 ,  C08K2201/019

Abstract: Provided are a chloroprene-based block copolymer, a latex, a latex composition, and a rubber composition with which it is possible to obtain a molded body having excellent tensile strength at break and tensile elongation at break even with use of less or no vulcanizing agent or vulcanization accelerator.
A chloroprene-based block copolymer including 30 to 60% by mass of a polymer block (A) derived from a monomer that can yield a polymer with a glass transition temperature of 80° C. or higher when homopolymerized and 40 to 70% by mass of a chloroprene-based polymer block (B) having a chloroprene monomer unit and a polyfunctional monomer unit.

公开(公告)号：US20240132649A1

公开(公告)日：2024-04-25

申请号：US18276400

申请日：2022-03-16

Applicant: DENKA COMPANY LIMITED

Inventor： Wataru NISHINO ,  Yushi KUMAGAI ,  Ibuki SHIMOTOMAI ,  Yutaka SAITO

IPC: C08F293/00 ,  A41D19/00 ,  C08F212/08 ,  C08F220/14 ,  C08F220/18 ,  C08F220/44 ,  C08F222/10

CPC classification number: C08F293/00 ,  A41D19/0055 ,  C08F212/08 ,  C08F220/14 ,  C08F220/1804 ,  C08F220/44 ,  C08F222/102

Abstract: A (meth)acrylate-based block copolymer including a polymer block and a (meth)acrylate-based polymer block, wherein: the (meth)acrylate-based block copolymer contains 5 to 30% by mass of the polymeric block and 70 to 95% by mass of the (meth)acrylate-based polymer block with respect to 100% by mass of the (meth)acrylate-based block copolymer; the polymer block has a monomer unit derived from a monomer; when the monomer is polymerized alone, a polymer with a glass transition temperature of 80° C. or higher can be obtained; and a tensile strength at break measured in accordance with JIS K 6251 of a film obtained by immersion-molding a (meth)acrylate-based block copolymer latex containing the (meth)acrylate-based block copolymer and heat-treating at 130° C. for 30 minutes is 14 MPa or more.

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：US20230074040A1

公开(公告)日：2023-03-09

申请号：US17788994

申请日：2021-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Hideharu MORI ,  Wataru NISHINO ,  Yushi KUMAGAI ,  Yutaka SAITO ,  Naoki KOBAYASHI

IPC: C08F293/00 ,  C08K5/06

Abstract: A chloroprene-based block copolymer, a latex, a latex composition, and a rubber composition that can produce a product with excellent tensile properties and flexibility without the use of a vulcanizing agent or a vulcanizing accelerator having a chloroprene-based block copolymer, contains 5 to 30% by mass of a polymer block (A) and 70 to 95% by mass of a chloroprene-based polymer block (B), wherein the polymer block (A) is derived from a monomer, when the monomer is polymerized alone, a polymer with a glass transition temperature of 80° C. or higher can be obtained and the chloroprene-based polymer block (B) includes a chloroprene monomer unit and a polyfunctional monomer unit.