公开(公告)号：EP4389815A1

公开(公告)日：2024-06-26

申请号：EP22878396.5

申请日：2022-09-28

申请人： Denka Company Limited

发明人： ITO, Misaki ,  KUMAGAI, Yushi ,  KATO, Masahiro

IPC分类号： C08L11/02 ,  C08F36/18 ,  C08K3/22 ,  C08K5/3447

CPC分类号： C08K5/3447 ,  C08K3/22 ,  C08F36/18 ,  C08L11/02

摘要： The present invention provides a chloroprene-based polymer latex composition, which has a low residual amount of mercaptans with hygiene concerns remaining, and which can obtain a chloroprene-based polymer dip-molded article having excellent flexibility and high breaking strength even with use of less vulcanization accelerator and sulfur, due to the plasticizing effect of a low molecular weight polymer and the use of a heteroaromatic ring-based compound.
According to the present invention, there is provided a chloroprene-based polymer latex composition including a chloroprene-based polymer latex, a metal oxide, and a heteroaromatic ring-based compound, wherein the chloroprene-based polymer latex composition includes 0.5 to 15.0 parts by mass of the metal oxide and 0.1 to 10.0 parts by mass of the heteroaromatic ring-based compound per 100 parts by mass of solid content of the chloroprene-based polymer latex, the chloroprene-based polymer latex composition has a content of alkyl mercaptan compounds of 0.34 parts by mass or less per 100 parts by mass of solid content of the chloroprene-based polymer latex, and the heteroaromatic ring-based compound is represented by chemical formula (1).

公开(公告)号：EP4163962A1

公开(公告)日：2023-04-12

申请号：EP21816974.6

申请日：2021-06-01

申请人： Denka Company Limited

发明人： KATO, Masahiro

IPC分类号： H01L23/36 ,  C08K5/5425 ,  C08L83/05 ,  C08L83/07 ,  C09K5/14 ,  C08K3/08 ,  C08K3/22 ,  C08K3/28 ,  C08K3/38

摘要： A two-agent curable heat conductive grease composition including a first agent and a second agent, wherein the first agent contains 100 parts by weight of a liquid resin (A-1), 140 parts by weight to 560 parts by weight of metal aluminum (B-1) having an average particle size of 15 to 100 µm, one or more heat conductive fillers (C-1) selected from the group consisting of aluminum oxide, aluminum nitride, and boron nitride and having an average particle size within a range of 0.3 to 10 µm, and a hydrosilylation reaction catalyst (D-1); the second agent contains 100 parts by weight of a liquid resin (A-2), 140 parts by weight to 560 parts by weight of metal aluminum (B-2) having an average particle size of 15 to 100 µm, and one or more heat conductive fillers (C-2) selected from the group consisting of aluminum oxide, aluminum nitride, and boron nitride and having an average particle size within a range of 0.3 to 10 µm, and at least one of the heat conductive filler (C-1) or the heat conductive filler (C-2) includes a first heat conductive filler (C-1-1) or a first heat conductive filler (C-2-1) being at least one or more selected from the group consisting of aluminum oxide, aluminum nitride, and boron nitride and having an average particle size of 0.3 to 1.5 µm.

公开(公告)号：EP4227332A1

公开(公告)日：2023-08-16

申请号：EP21906101.7

申请日：2021-10-01

申请人： Denka Company Limited

发明人： KATO, Masahiro ,  ITO, Misaki ,  KUMAGAI, Yushi ,  SAITO, Yutaka

IPC分类号： C08F289/00 ,  C08L11/02 ,  C08L93/04 ,  C08F2/44 ,  C08J5/02 ,  A41D19/00 ,  A41D19/04 ,  A61L29/04

摘要： 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：EP4378969A1

公开(公告)日：2024-06-05

申请号：EP22869915.3

申请日：2022-09-09

申请人： Denka Company Limited

发明人： KATO, Masahiro ,  KUMAGAI, Yushi ,  ITO, Misaki

IPC分类号： C08F236/18 ,  C08L13/02 ,  C08K3/06 ,  C08K3/22

CPC分类号： C08L13/02 ,  C08K3/22 ,  C08F236/18 ,  C08K3/06

摘要： 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：EP4241955A1

公开(公告)日：2023-09-13

申请号：EP22775048.6

申请日：2022-03-07

申请人： Denka Company Limited

发明人： ITO, Misaki ,  KATO, Masahiro ,  KUMAGAI, Yushi

IPC分类号： B29C41/14 ,  C08L11/02 ,  C08J5/02

摘要： 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：EP3868835A1

公开(公告)日：2021-08-25

申请号：EP19874609.1

申请日：2019-10-10

申请人： Denka Company Limited

发明人： KATO, Masahiro

IPC分类号： C08L83/07 ,  C08K3/013 ,  C08K3/11 ,  C08K3/36 ,  C08L83/05 ,  C09K5/14 ,  H01L23/36 ,  H01L23/373

摘要： A two-pack curable composition set having: a first agent comprising an organopolysiloxane having a branched structure and having a vinyl group at least at an end or in a side chain, a thermally conductive filler, a silica powder, and a platinum catalyst, and having a viscosity at 25°C at a shear rate of 10 s -1 of 20 to 150 Pa·s; and a second agent comprising an organopolysiloxane having a branched structure and having a vinyl group at least at an end or in a side chain, and a polydimethylsiloxane having a hydrosilyl group at least at an end or in a side chain, a thermally conductive filler, and a silica powder, and having a viscosity at 25°C at a shear rate of 10 s -1 of 20 to 150 Pa·s.

公开(公告)号：EP4241956A1

公开(公告)日：2023-09-13

申请号：EP22775344.9

申请日：2022-03-16

申请人： Denka Company Limited

发明人： ITO, Misaki ,  KATO, Masahiro ,  KUMAGAI, Yushi

IPC分类号： B29C41/14 ,  C08F236/18 ,  C08L11/02 ,  C08J5/02

摘要： 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.