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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.
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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.
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3.
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.
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4.
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
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.
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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.
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6.
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.
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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.
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