公开(公告)号：US20230183480A1

公开(公告)日：2023-06-15

申请号：US17920143

申请日：2021-07-20

Applicant: DENKA COMPANY LIMITED

Inventor： Soichiro NAKANISHI ,  Masanori MATSUMOTO ,  Kohei NISHINO

IPC: C08L79/08 ,  B29C45/00 ,  C08L55/02 ,  C08L35/06

CPC classification number: C08L79/08 ,  B29C45/0001 ,  C08L55/02 ,  C08L35/06 ,  B29L2031/3055

Abstract: A maleimide-based copolymer which allows to obtain a resin composition having balanced heat resistance providing property and impact resistance, superior flowabillty, and low yellowness (YI); a maleimide-based copolymer composition using such maleimide-based copolymer; a resin composition.; and an injection molded body are provided. A maleimide-based copolymer, including: aromatic vinyl monomer unit, vinyl cyanide monomer unit, and maleimide monomer unit; wherein: the maleimide-based copolymer has a weight average molecular weight of 50,000 to 110,000; and the maleimide-based copolymer has a mid-point glass transition temperature measured in accordance with JIS K-7121 of 165° C. to 200° C., is provided.

公开(公告)号：US20200207898A1

公开(公告)日：2020-07-02

申请号：US16622513

申请日：2018-06-13

Applicant: DENKA COMPANY LIMITED

Inventor： Soichiro NAKANISHI ,  Takuya NARUTOMI ,  Kyoichi INOUE ,  Shigeru SUZUKI ,  Jun WATANABE

IPC: C08F261/04 ,  C08K3/04 ,  C08L51/00 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/525 ,  H01M4/131 ,  H01M4/505

Abstract: An object of the present invention is to provide a composition having flexibility. A composition comprising a graft copolymer in which a monomer, including a (meth) acrylonitrile and a (meth) acrylic acid ester as a main monomer, graft-copolymerizes to a backbone polymer having a polyvinyl alcohol, wherein the polyvinyl alcohol has a saponification degree of 50 to 100 mol %, a content of the composition of the polyvinyl alcohol is 5 to 50% by mass, a total content of the (meth) acrylonitrile monomer unit and the (meth) acrylic acid ester monomer unit is 50 to 95% by mass, a content of the (meth) acrylonitrile monomer unit in a total of 100% by mass of the (meth) acrylonitrile monomer unit and the (meth)acrylate monomer unit is 20 to 95% by mass, a content of the (meth)acrylate monomer unit in a total of 100% by mass of the (meth) acrylonitrile monomer unit and the (meth)acrylate monomer unit is 5 to 80% by mass, the (meth) acrylic acid ester is a monomer whose homopolymer has a glass transition temperature of 150 to 300 K.

公开(公告)号：US20240141157A1

公开(公告)日：2024-05-02

申请号：US18278683

申请日：2021-07-01

Applicant: DENKA COMPANY LIMITED

Inventor： Soichiro NAKANISHI ,  Yuya NAKAMURA ,  Hitomi YAKUNO ,  Tadashi SAWASATO

IPC: C08L53/02 ,  C08J5/18

CPC classification number: C08L53/02 ,  C08J5/18 ,  C08J2353/02 ,  C08L2203/16

Abstract: A block copolymer composition contains a block copolymer having a vinyl aromatic hydrocarbon monomer unit and a conjugated diene monomer unit. The block copolymer composition satisfies: when a total of the vinyl aromatic hydrocarbon monomer unit and the conjugated diene monomer unit in the composition is taken as 100 mass %, a content of the conjugated diene monomer unit is 10-20 mass %; the composition contains 60-100 mass % of the block copolymer having a structure represented by (S)-[(S/B)]2 where (S) is a polymer chain of the vinyl aromatic hydrocarbon monomer unit, and (S/B) is a copolymer chain having the vinyl aromatic hydrocarbon monomer unit and the conjugated diene monomer unit; Mn of the block copolymer contained in the composition is 100,000-200,000; and when storage moduli measured at 70° C. and 100° C. in dynamic viscoelasticity measurement are defined as E′70 and E′100, V in V=E′70×(E′70−E′100)/30 is 0.5×1016-2.0×1016.

公开(公告)号：US20230265288A1

公开(公告)日：2023-08-24

申请号：US18017963

申请日：2021-09-02

Applicant: DENKA COMPANY LIMITED

Inventor： Soichiro NAKANISHI

IPC: C08L79/08 ,  B29C45/00

CPC classification number: C08L79/08 ,  B29C45/0001 ,  B29K2079/08

Abstract: A heat resistant resin composition which does not cause stringing when performing fusion-bonding using heated plates. A heat resistant resin composition, including: a maleimide-based copolymer; and at least one resin selected from the group including: ABS resin, ASA resin, AES resin, and SAN resin; wherein: the heat resistant resin composition has a ratio G′/G″ of storage modulus (G′) to loss modulus (G″) measured in accordance with JIS K 7244-10 under conditions of 240° C. at an angular velocity of 0.63 rad/s is 0.30 or more and 1.00 or less.

公开(公告)号：US20220356285A1

公开(公告)日：2022-11-10

申请号：US17622640

申请日：2020-07-07

Applicant: DENKA COMPANY LIMITED

Inventor： Soichiro NAKANISHI ,  Masanori MATSUMOTO ,  Kohei NISHINO

IPC: C08F234/00 ,  C08L9/06

Abstract: A maleimide based copolymer, manufacturing method thereof, and a resin composition using the maleimide based copolymer is provided. The maleimide based copolymer includes 40 to 60 mass % of aromatic vinyl monomer unit, 5 to 20 mass % of vinyl cyanide monomer unit, 35 to 50 mass % of maleimide monomer unit, and 0 to 10 mass % of monomer copolymerizable with these monomer units. The maleimide based copolymer has a glass transition temperature of 165° C. or higher and a melt mass flow rate of 25 to 80 g/10 min measured at 265° C. with 98 N load. By using such maleimide based copolymer, flowability can be improved without decreasing heat resistance providing ability.