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公开(公告)号：EP4378971A1
公开(公告)日：2024-06-05
申请号：EP22875971.8
申请日：2022-09-21
IPC分类号： C08F293/00 , C08L11/02 , C08K3/014
CPC分类号： C08F293/00 , C08L11/02 , C08K3/014
摘要： 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.-
2.发明公开
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
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.
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公开(公告)号：EP4332194A1
公开(公告)日：2024-03-06
申请号：EP22815907.5
申请日：2022-05-24
发明人： NAGAOKA, Kota , KUMAGAI, Yushi
IPC分类号： C09J111/00
摘要： The chip, which has excellent blocking resistance and dissolves in an organic solvent in a short time, is provided. By the chip also an adhesive composition with excellent brushability and layer separation resistance and little coloration can be obtained. A method for producing the chip, and an adhesive composition that has excellent brushability and layer separation resistance, and little coloring. are also provided.
According to the present invention, a chip for an adhesive composition, comprising a chloroprene-based polymer rubber, wherein: a temperature near a center of the chip 60 seconds after the chip heated to 140°C is kept in a room at 23°C is less than 130°C; time required for Ax to exceed A 0 + 20 is less than 500 minutes; A 0 is a Type A durometer hardness measured in accordance with JIS K 6253-3 of a 6 mm thickness sheet, prepared by press molding the chip at 70°C, taken out from a mold and allowed to stand for 1 hour in a 23°C environment; A X is a Type A durometer hardness after X minutes of placing the 6 mm thick sheet in a thermostatic chamber at -10°C, is provided.-
4.发明公开
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
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.
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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
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：EP4282889A1
公开(公告)日：2023-11-29
申请号：EP22775343.1
申请日：2022-03-16
IPC分类号： C08F257/00 , C08F265/00 , C08L53/00
摘要： According to the present invention, a (meth)acrylate-based block copolymer, a (meth)acrylate-based block copolymer latex, a (meth)acrylate-based block copolymer latex composition, and a (meth)acrylate-based block copolymer latex composition, which provide an immersion molded film with excellent flexibility, tensile properties, and heat aging resistance even if the amount of vulcanizing agent or vulcanization accelerator used is reduced or not used, and a molded body with excellent flexibility, tensile properties, and heat aging resistance even if the amount of vulcanizing agent or vulcanization accelerator used is reduced or they are not used, are provided.
According to the present invention, a (meth)acrylate-based block copolymer comprising a polymer block (A) and a (meth)acrylate-based polymer block (B), wherein: the (meth)acrylate-based block copolymer contains 5 to 30% by mass of the polymeric block (A) and 70 to 95% by mass of the (meth)acrylate-based polymer block (B) with respect to 100% by mass of the (meth)acrylate-based block copolymer; the polymer block (A) 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, is provided.-
公开(公告)号：EP4130078A1
公开(公告)日：2023-02-08
申请号：EP21775310.2
申请日：2021-03-22
IPC分类号： C08F293/00 , C08L53/02
摘要： The present invention provides a chloroprene-based block copolymer, a latex, a latex composition, and a rubber composition that can produce a product with excellent flexibility and tensile properties without the use of a vulcanizing agent or a vulcanizing accelerator.
A chloroprene-based block copolymer, comprising 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;
the chloroprene-based polymer block (B) includes a chloroprene monomer; and
the chloroprene-based block copolymer has a toluene insoluble content of 20 to 100% by mass with respect to 100% by mass of the chloroprene-based block copolymer.-
8.发明公开
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
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
发明人： ITO, Misaki , KATO, Masahiro , KUMAGAI, Yushi
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.
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公开(公告)号：EP4130080A1
公开(公告)日：2023-02-08
申请号：EP21776849.8
申请日：2021-03-22
IPC分类号： C08F293/00 , C08L53/02
摘要： 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 is provided.
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;
the chloroprene-based polymer block (B) includes a chloroprene monomer unit and a polyfunctional monomer unit.
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