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公开(公告)号：US11912859B2
公开(公告)日：2024-02-27
申请号：US16973768
申请日：2019-06-17
CPC分类号： C08L63/00 , C08J5/243 , C08J5/249 , C08J2363/00 , C08J2463/00 , C08J2481/06 , C08L2205/025 , C08L2205/035
摘要： The purpose of the present invention is to provide: an epoxy resin composition capable of giving cured resins which combine flexural modulus with flexural strain on a high level and have excellent heat resistance; a prepreg comprising the epoxy resin composition and reinforcing fibers; and a fiber-reinforced composite material obtained by curing the prepreg and excellent especially in terms of 0° and 90° bending strength. An embodiment of the epoxy resin composition of the present invention for achieving such purpose is an epoxy resin composition which comprises the following components [A], [B], and [C] and satisfies a specific requirement. Component [A]: a trifunctional amine type epoxy resin. Component [B]: a bisphenol F type epoxy resin which is solid at 25° C. Component [C]: an aromatic amine compound.
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公开(公告)号：US11840612B2
公开(公告)日：2023-12-12
申请号：US17607981
申请日：2020-05-15
发明人： Jun Misumi , Masato Honma , Kyoko Shinohara , Noriyuki Hirano
IPC分类号： C08J5/24 , B29C70/00 , B29C70/18 , B29C70/88 , B29K63/00 , B29K101/12 , B29K105/08 , B29K307/04
CPC分类号： C08J5/243 , B29C70/0035 , B29C70/18 , B29C70/88 , B29K2063/00 , B29K2101/12 , B29K2105/0872 , B29K2307/04 , B29K2995/0046 , B29K2995/0072 , B29K2995/0077 , B29K2995/0082
摘要： An object of the present invention is to provide a prepreg and a laminate for producing a laminate suitable as a structural material, which have excellent compressive strength and interlaminar fractural toughness values, and can be firmly integrated with another structural member by welding. The present invention provides a prepreg including the following structural components [A] reinforcing fibers, [B] a thermosetting resin, and [C] a thermoplastic resin, in which [B] has a rubbery state elastic modulus of 10 MPa or more at a temperature obtained by adding 50° C. to a glass transition temperature in a state in which a degree of cure is 90% or more, [C] is present in a surface of the prepreg, and the reinforcing fibers [A] are present, which are included in a resin area including {B] and a resin area including [C] across an interface between the two resin areas.
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公开(公告)号：US11345808B2
公开(公告)日：2022-05-31
申请号：US16628157
申请日：2018-07-18
IPC分类号： C08J5/24 , C08L63/04 , C08L63/00 , C08G59/32 , C08G59/38 , C08G59/40 , C08G59/68 , C08G59/46 , C08J5/04 , C08J5/10 , B32B27/26 , B32B27/38 , C08K5/21 , C08K5/55
摘要： The present invention aims to provide an epoxy resin composition that is high in both fast curability and storage stability, a prepreg prepared by using the epoxy resin composition, and a fiber reinforced composite material prepared by curing the prepreg.
The epoxy resin composition contains the following components [A], [B], [C], and [D] and meets the following requirements [a], [b], and [c]: [A]: epoxy resin, [B]: dicyandiamide, [C]: aromatic urea, [D]: borate ester, [a]: 0.014≤(content of component [D]/content of component [C])≤0.045, [b]: 0.9≤(number of moles of active groups in component [A]/number of moles of active hydrogen in component [B])≤1.2, and [c]: 14≤(content of component [A]/content of component [C])≤25.-
公开(公告)号：US10093777B2
公开(公告)日：2018-10-09
申请号：US14442764
申请日：2013-12-06
发明人： Yoshiki Takebe , Hiroki Kihara , Noriyuki Hirano
IPC分类号： C08J5/04 , C08K7/06 , B29C70/02 , B29C45/00 , B29C45/14 , C08J5/24 , B29C43/30 , B32B5/02 , B32B27/12 , B32B27/34 , B32B27/36 , B29C43/18 , B29C70/34 , B29L31/34 , B29K105/12 , B29K101/12 , B29K307/04
摘要： A fiber-reinforced resin sheet and an integrally molded article are provided. The fiber-reinforced resin sheet comprises a nonwoven fabric made of reinforcing fibers having a thermoplastic resin (A) impregnated on one side of the nonwoven fabric. The fiber-reinforced resin sheet satisfies any one of the following conditions (I) and (II): (I) the nonwoven fabric has an area wherein the reinforcing fibers constituting the nonwoven fabric are exposed on the other side in the thickness direction of the nonwoven fabric, and (II) the nonwoven fabric has a thermoplastic resin (B) impregnated on the other side in thickness direction of the nonwoven fabric, and the nonwoven fabric has a reinforcing fiber volume ratio Vfm of up to 20% by volume, and wherein the thermoplastic resin (A) and the thermoplastic resin (B) form an interface layer in the sheet, and the interface layer has a concave-convex shape with a maximum height Ry of at least 50 μm and an average roughness Rz of at least 30 μm.
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公开(公告)号：US09475920B2
公开(公告)日：2016-10-25
申请号：US14371247
申请日：2012-11-16
CPC分类号： C08K7/06 , C08J5/042 , C08J5/18 , C08J2323/10 , C08J2451/06 , C08K3/04 , C08L23/12 , C08L51/06
摘要： The present invention relates to a carbon fiber-reinforced polypropylene sheet which comprises carbon fibers having a weight-average fiber length of 1.5 mm to 20 mm and a matrix resin composed of a polypropylene and an acid-modified polypropylene, wherein the carbon fibers are dispersed in the form of single fibers and the interfacial shear strength between the carbon fibers and said matrix resin is 5.50 to 10.5 MPa. Provided is a carbon fiber-reinforced polypropylene sheet for obtaining a molded article having excellent mechanical properties and impact resistance, which carbon fiber-reinforced polypropylene sheet comprises discontinuous carbon fibers and a polypropylene, can be molded into a complex shape and has isotropic mechanical properties.
摘要翻译： 碳纤维增强聚丙烯片本发明涉及一种碳纤维增强聚丙烯片，其包含重均纤维长度为1.5mm至20mm的碳纤维和由聚丙烯和酸改性聚丙烯组成的基质树脂，其中碳纤维分散 以单纤维的形式，碳纤维与基体树脂之间的界面剪切强度为5.50〜10.5MPa。 本发明提供一种碳纤维增强聚丙烯片材，其可以将具有优异的机械性能和耐冲击性的成型体得到，所述碳纤维增强聚丙烯片材可以成型为复合形状，具有各向同性的机械特性。
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公开(公告)号：US20230279219A1
公开(公告)日：2023-09-07
申请号：US18019169
申请日：2021-08-06
CPC分类号： C08L63/00 , C08J3/28 , C08J5/246 , C08L2205/03 , C08J2363/00
摘要： An epoxy resin composition is provided that has an elastic modulus, deformability, fracture toughness, and heat resistance in good balance. A prepreg produced from the epoxy resin composition and a fiber-reinforced composite material produced by curing the prepreg are also provided, where the epoxy resin composition includes the components [A], [B], and [C] and satisfies all of the requirements (1), (2), and (3) as described.
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7.发明授权公开(公告)号：US10696805B2
公开(公告)日：2020-06-30
申请号：US15580375
申请日：2016-06-22
发明人： Ayumi Mori , Noriyuki Hirano , Masayuki Miyoshi
IPC分类号： B32B1/02 , B32B27/04 , B32B27/26 , B32B27/38 , C08L63/00 , C08G59/32 , C08G59/50 , C08J5/04 , C08G59/28 , C08G59/42 , B01J3/04 , C08G59/24
摘要： One purpose of the present invention is to provide an epoxy resin composition which is for obtaining a fiber-reinforced composite material that combines heat resistance with tensile strength on a high level. The other purpose is to provide: a fiber-reinforced composite material obtained using this epoxy resin composition; and a molded article and a pressure vessel both containing the fiber-reinforced composite material. The present invention has the following configuration in order to achieve the above purposes. Namely, the epoxy resin composition includes the constituent element [A]: An epoxy resin including an aromatic ring and having a functionality of 2 or higher and the following constituent element [B]: An amine-based hardener or an acid anhydride-based hardener, and is characterized in that a cured object obtained by curing the epoxy resin composition has a rubber-state modulus of 10 MPa or less when evaluated for dynamic viscoelasticity and the cured object has a glass transition temperature of 95° C. or higher.
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公开(公告)号：US10266641B2
公开(公告)日：2019-04-23
申请号：US15507929
申请日：2015-07-16
发明人： Reo Takaiwa , Kentaro Sano , Noriyuki Hirano
IPC分类号： B32B27/38 , B32B27/26 , B32B27/20 , B32B27/04 , C08J5/24 , C08G59/40 , C08G59/68 , C08L63/00 , C08G59/46 , C08K3/38 , C08K5/315 , C08K5/3445 , C08G59/22 , C08G59/24 , C08G59/38 , C08G59/50 , C08J5/04 , C09J163/00
摘要： Provided are: an epoxy resin composition for fiber-reinforced composite materials, which has a good balance between storage stability and fast curing properties at high levels; a prepreg; and an epoxy resin composition which exhibits excellent mechanical characteristics as a fiber-reinforced composite material. A resin composition which contains an epoxy resin, dicyandiamide, an imidazole compound and an acidic compound, while satisfying the following conditions (a)-(c): (d) The time until the heat flow rate reaches the peak top after the epoxy resin composition reaches 100° C. is 25 minutes or less as measured by a differential scanning calorimeter at an isothermal temperature of 100° C. in a nitrogen gas stream. (e) The time until the heat flow rate reaches the peak top after the epoxy resin composition reaches 60° C. is 15 hours or more as measured by a differential scanning calorimeter at an isothermal temperature of 60° C. in a nitrogen gas stream. (f) The ratio of the number of epoxy groups to the number of imidazole rings in the epoxy resin composition is from 25 to 90 (inclusive).
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公开(公告)号：US20190054706A1
公开(公告)日：2019-02-21
申请号：US16079259
申请日：2017-02-14
摘要： A method of producing a fiber reinforced composite material satisfies condition 1: a thermosetting resin base material (B) includes a thermosetting resin (a) and a nonwoven fabric-shaped base material (a thermosetting resin base material satisfying the condition 1 is referred to as a thermosetting resin base material (B-1)); and condition 2: the thermosetting resin base material (B) is a base material including the thermosetting resin (a), and a porous sheet-shaped base material (b) or a film-shaped base material (c), the thermosetting resin (a) has a viscosity of 1,000 Pa·s or more at 40° C., and the thermosetting resin (a) has a minimum viscosity of 10 Pa·s or less during heating from 30° C. at a temperature rise rate of 1.5° C./min (a thermosetting resin base material satisfying the condition 2 is referred to as a thermosetting resin base material (B-2)).
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10.发明申请公开(公告)号：US20180186946A1
公开(公告)日：2018-07-05
申请号：US15580375
申请日：2016-06-22
发明人： Ayumi Mori , Noriyuki Hirano , Masayuki Miyoshi
摘要： One purpose of the present invention is to provide an epoxy resin composition which is for obtaining a fiber-reinforced composite material that combines heat resistance with tensile strength on a high level. The other purpose is to provide: a fiber-reinforced composite material obtained using this epoxy resin composition; and a molded article and a pressure vessel both containing the fiber-reinforced composite material. The present invention has the following configuration in order to achieve the above purposes. Namely, the epoxy resin composition includes the constituent element [A]: An epoxy resin including an aromatic ring and having a functionality of 2 or higher and the following constituent element [B]: An amine-based hardener or an acid anhydride-based hardener, and is characterized in that a cured object obtained by curing the epoxy resin composition has a rubber-state modulus of 10 MPa or less when evaluated for dynamic viscoelasticity and the cured object has a glass transition temperature of 95° C. or higher.
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