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公开(公告)号：US20210363316A1
公开(公告)日：2021-11-25
申请号：US17253205
申请日：2019-03-27
发明人： Hiroshi Kobayashi , Taiki Maeyama , Daisuke Kido , Takashi Ikushima , Naofumi Hosokawa , Hirokazu Ohnishi
摘要： A prepreg having high processability and laminating performance and a method to produce such a prepreg in an industrially advantageous way is described, the prepreg comprising at least the components [A] to [E] shown below, and having a structure incorporating a first layer composed mainly of the component [A] and a first epoxy resin composition that contains the components [B] to [D] but which is substantially free of the component [E], and a second layer composed mainly of a second epoxy resin composition that contains the components [B] to [E] and which is disposed adjacent to each surface of the first layer, the second epoxy resin composition being characterized in that its component [D] has a weight-average molecular weight of 2,000 to 30,000 g/mol and accounts for 5 to 15 parts by mass relative to the total quantity of its components [B] to [E], which accounts for 100 parts by mass, [A] carbon fiber, [B] epoxy resin, [C] curing agent, [D] thermoplastic resin, and [E] particles containing a thermoplastic resin as primary component and having a volume-average particle diameter of 5 to 50 μm.
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公开(公告)号：US11939465B2
公开(公告)日：2024-03-26
申请号：US17253205
申请日：2019-03-27
发明人： Hiroshi Kobayashi , Taiki Maeyama , Daisuke Kido , Takashi Ikushima , Naofumi Hosokawa , Hirokazu Ohnishi
CPC分类号： C08L63/00 , C08J5/243 , C08J2363/02 , C08J2477/00 , C08J2481/06 , C08L2205/03
摘要： A prepreg having high processability and laminating performance and a method to produce such a prepreg is described, the prepreg comprising at least the components [A] to [E] shown below, and having a structure incorporating a first layer composed mainly of the component [A] and a first epoxy resin composition that contains the components [B] to [D] but which is substantially free of the component [E], and a second layer composed mainly of a second epoxy resin composition that contains the components [B] to [E],
[A] carbon fiber,
[B] epoxy resin,
[C] curing agent,
[D] thermoplastic resin, and
[E] particles containing a thermoplastic resin as primary component and having a volume-average particle diameter of 5 to 50 μm.-
公开(公告)号：US20230357561A1
公开(公告)日：2023-11-09
申请号：US18206386
申请日：2023-06-06
发明人： Hiroshi Kobayashi , Taiki Maeyama , Hiroaki Sakata
CPC分类号： C08L63/00 , C08J5/243 , C08J2363/00 , C08J2363/02 , C08J2463/00 , C08J2463/02 , C08J2481/06 , C08L2205/025 , C08L2205/03 , C08L2205/035
摘要： A prepreg is provided that has excellent processability and handleability and that can be processed into a cured product with high heat resistance. Also provided is a method to produce such a prepreg in an industrially advantageous way without being restricted by the types and contents of the matrix resin components used. The prepreg includes at least components [A] to [D] as given below and a preliminary reaction product that is a reaction product of the component [B] and the component [C], at least one surface resin in the prepreg having a storage elastic modulus G′ in the range of 1.0×103 to 2.0×108 Pa as measured at a temperature of 40° C. and an angular frequency in the range of 0.06 to 314 rad/s: [A] carbon fiber, [B] epoxy resin comprising a m- or p-aminophenol epoxy resin [b1] and either a glycidyl ether epoxy resin or a glycidyl amine epoxy resin [b2] that has two or more glycidyl groups in a molecule, [C] curing agent, and [D] thermoplastic resin.
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公开(公告)号：US20210122892A1
公开(公告)日：2021-04-29
申请号：US17253214
申请日：2019-06-25
发明人： Hiroshi Kobayashi , Taiki Maeyama , Daisuke Kido , Takashi Ikushima , Naofumi Hosokawa , Hirokazu Ohnishi
摘要： A prepreg having a high processability and laminating performance in an automated lay-up device and serving to produce a cured product having good physical properties is described, and also a method for the production thereof, the prepreg comprising at least the components [A] to [E] listed blow and having a structure incorporating a first layer composed mainly of the component [A] and a first epoxy resin composition that contains the components [B] to [D] but is substantially free of the component [E] and a second layer composed mainly of a second epoxy resin composition that contains the components [B] to [E] and disposed adjacent to each surface of the first layer: [A] carbon fiber, [B] epoxy resin, [C] curing agent, [D] thermoplastic resin, and [E] particles containing a thermoplastic resin as primary component and having a volume-average particle diameter of 5 to 50 μm.
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公开(公告)号：US11708487B2
公开(公告)日：2023-07-25
申请号：US16475518
申请日：2018-01-18
发明人： Hiroshi Kobayashi , Taiki Maeyama , Hiroaki Sakata
CPC分类号： C08L63/00 , C08J5/243 , C08J2363/00 , C08J2363/02 , C08J2463/00 , C08J2463/02 , C08J2481/06 , C08L2205/025 , C08L2205/03 , C08L2205/035
摘要： A prepreg is provided that has excellent processability and handleability and that can be processed into a cured product with high heat resistance. Also provided is a method to produce such a prepreg in an industrially advantageous way without being restricted by the types and contents of the matrix resin components used. The prepreg includes at least components [A] to [D] as given below and a preliminary reaction product that is a reaction product of the component [B] and the component [C], at least one surface resin in the prepreg having a storage elastic modulus G′ in the range of 1.0×103 to 2.0×108 Pa as measured at a temperature of 40° C. and an angular frequency in the range of 0.06 to 314 rad/s: [A] carbon fiber, [B] epoxy resin, [C] curing agent, and [D] thermoplastic resin.
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公开(公告)号：US20190330433A1
公开(公告)日：2019-10-31
申请号：US16475518
申请日：2018-01-18
发明人： Hiroshi Kobayashi , Taiki Maeyama , Hiroaki Sakata
摘要： A prepreg is provided that has excellent processability and handleability and that can be processed into a cured product with high heat resistance. Also provided is a method to produce such a prepreg in an industrially advantageous way without being restricted by the types and contents of the matrix resin components used. The prepreg includes at least components [A] to [D] as given below and a preliminary reaction product that is a reaction product of the component [B] and the component [C], at least one surface resin in the prepreg having a storage elastic modulus G′ in the range of 1.0×103 to 2.0×108 Pa as measured at a temperature of 40° C. and an angular frequency in the range of 0.06 to 314 rad/s: [A] carbon fiber, [B] epoxy resin, [C] curing agent, and [D] thermoplastic resin.
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