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公开(公告)号：US20210371613A1
公开(公告)日：2021-12-02
申请号：US16980988
申请日：2019-02-27
发明人： Koji Furukawa , Junko Kawasaki , Soichi Yoshizaki , Kentaro Sano , Toshiya Kamae
摘要： A prepreg having excellent tackiness as well as excellent resin strength after curing and strength in the non-fiber direction is described; and a fiber-reinforced composite material using the prepreg, where the prepreg is composed of reinforcing fibers and a resin composition which includes [A] an epoxy resin, [B] a dicyanamide and [C] a compound having a melting point of 130° C. or lower and a solubility parameter whose difference from the solubility parameter of [B] is 8 or less.
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公开(公告)号：US20210189078A1
公开(公告)日：2021-06-24
申请号：US16757839
申请日：2018-11-27
发明人： Kentaro Sano , Taiki Kuroda , Hiroyuki Uchida , Toshiya Kamae
摘要： Disclosed is a prepreg comprising an epoxy resin composition containing [A] an epoxy resin and [B] a curing agent, and a reinforcing fiber, wherein the epoxy resin composition satisfies: (a) [A1] an epoxy resin represented by the general formula (I) is contained as the epoxy resin [A], and [A1′] an epoxy resin satisfying: n≥2 among the component [A1]; wherein, R1, R2 and R3 each independently represent a hydrogen atom or a methyl group, and n represents an integer of 1 or more; (b) the entire epoxy resin has an average epoxy equivalent of 165 to 265 g/eq; (c) a water absorption coefficient at 85° C. and 95% RH for 2 hours is 3.0% by mass or less based on 100% by mass of the epoxy resin composition; (d) [B1] an aromatic urea as [B] a curing agent; and (e) the content of [B2] dicyandiamide is 0.5 part by mass or less based on 100 parts by mass of the entire epoxy resin.
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公开(公告)号：US10804542B2
公开(公告)日：2020-10-13
申请号：US16078330
申请日：2017-03-27
摘要： A gas diffusion electrode substrate has an electrically conductive porous substrate and a microporous layer-1 on one side of the electrically conductive porous substrate. The microporous layer-1 includes a dense portion A and a dense portion B. The dense portion A is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 20 nm to 39 nm. The dense portion A has a thickness of 30% to 100% with respect to the thickness of the microporous layer-1 as 100% and a width of 10 μm to 200 μm. The dense portion B is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 40 nm to 70 nm.
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4.发明申请公开(公告)号：US20200165378A1
公开(公告)日：2020-05-28
申请号：US16611351
申请日：2018-04-05
发明人： Kentaro Sano , Taiki Kuroda , Ayumi Mori , Toshiya Kamae
摘要： Provided is a fiber-reinforced composite material exhibiting high heat resistance and excellent appearance quality. is the composite material is based on an epoxy resin composition which contains constituents [A], [B], and [C] and satisfies conditions (i) and (ii): [A] a tri- or higher functional epoxy resin; [B] an aromatic amine; [C] an imidazole compound; 0.20≤b/a≤0.60; and (i) 0.002≤c/a≤0.014; (ii) wherein a (mol) denotes the number of epoxy groups in 100 g of the epoxy resin composition, b (mol) denotes the number of active hydrogens contained in the constituent [B], and c (mol) denotes the number of imidazole rings contained in the constituent [C]).
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5.发明授权公开(公告)号：US10184034B2
公开(公告)日：2019-01-22
申请号：US14362533
申请日：2012-11-12
摘要： The carbon fiber forming raw material is a carbon fiber forming raw material (Z) as a prepreg including sizing agent-coated carbon fibers and a thermosetting resin or a carbon fiber forming raw material (Y) as a forming material that includes sizing agent-coated carbon fibers and has a woven fabric form or a braid form. The sizing agent includes components (A) and (B). The component (A) is an epoxy compound having two or more epoxy groups or two or more types of functional groups. The component (B) is one or more compounds selected from the group consisting of a tertiary amine compound, a tertiary amine salt, a quaternary ammonium salt, a quaternary phosphonium salt, and a phosphine compound. The component (B) is contained in an amount of 0.1 to 25 parts by mass relative to 100 parts by mass of the component (A).
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公开(公告)号：US20210230384A1
公开(公告)日：2021-07-29
申请号：US17051512
申请日：2019-05-15
发明人： Masahiro Tsuzuki , Kentaro Sano , Toshiya Kamae
摘要： The present invention addresses the problem of providing: a towpreg that has superior bobbin unspoolability and process pass-through properties, and is capable of yielding a fiber-reinforced composite having extremely high 0° tensile strength utilization; and a pressure vessel using such a towpreg. The means for solving this problem is a towpreg obtained by impregnating a reinforcing fiber tow with an epoxy resin composition containing [A]-[D], wherein: the epoxy resin composition contains 10-90 parts by mass of [A] and 10-50 parts by mass of [B] per 100 parts by mass of the epoxy resin component; the epoxy resin composition has a 25° C. viscosity (η25) of 1-40 Pa·s and a 40° C. viscosity (η40) of 0.2-5 Pa·s; and the cured epoxy resin composition has a glass transition temperature (Tg) of 95° C. or higher. [A] A bisphenol epoxy resin [B] Unsubstituted or substituted N,N-diglycidyl aniline [C] Dicyandiamide [D] A cure accelerator
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公开(公告)号：US10950868B2
公开(公告)日：2021-03-16
申请号：US15777447
申请日：2016-12-16
IPC分类号： H01M4/86 , H01M4/96 , H01M8/0234 , H01M8/0245 , H01M8/04119 , H01M4/88 , H01M8/10
摘要： A gas diffusion electrode in which a microporous layer is provided on at least one surface of a conductive porous substrate, wherein the areas obtained by dividing the cross section perpendicular to the plane of the microporous layer into three equal parts in the thickness direction are a first area, a second area, and a third area, with respect to the conductive porous substrate side, the fluorine strength of the third area being 0.8 to 1.2 times the fluorine strength of the second area.
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8.发明授权公开(公告)号：US10411269B2
公开(公告)日：2019-09-10
申请号：US15119314
申请日：2015-02-17
IPC分类号： H01M8/0245 , H01M8/0234 , H01M8/0239 , H01M8/1004 , H01M4/86 , H01M4/96 , H01M8/1018
摘要： A gas diffusion electrode substrate that is used in a fuel cell and is constituted by an electrode substrate and microporous parts, in which a microporous part (A) is formed on one surface of the electrode substrate, and a microporous part (B) is formed in a part of the inside of the electrode substrate, the gas diffusion electrode substrate having a part in which the microporous part (B) is continuously present from the electrode substrate surface on the side on which the microporous part (A) is formed to a position near the electrode substrate surface on the opposite side, and a part in which pores are continuously distributed from the electrode substrate surface on the side on which the microporous part A is formed to the electrode substrate surface on the opposite side.
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公开(公告)号：US10256477B2
公开(公告)日：2019-04-09
申请号：US15119325
申请日：2015-02-17
IPC分类号： H01M8/0243 , H01M8/0234 , H01M8/0239 , H01M8/1018
摘要： A gas diffusion electrode substrate that is used in a fuel cell, wherein a microporous layer constituted by a carbon based filler and a fluororesin is formed on one surface of the electrode substrate, the sliding angle of water on the surface on the opposite side of the surface on which the microporous layer is formed is 30 degrees or less, and the through-plane gas permeation resistance is 15 to 190 mmAq.
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公开(公告)号：US10003079B2
公开(公告)日：2018-06-19
申请号：US14398842
申请日：2013-04-25
IPC分类号： H01M4/86 , H01M4/96 , H01M8/1018
CPC分类号： H01M4/8626 , H01M4/8657 , H01M4/96 , H01M2008/1095 , H01M2300/0082
摘要： A gas diffusion electrode medium is for a fuel cell, has a low in-plane gas permeability and favorable water drainage characteristics in addition to high conductivity, and is able to exhibit high cell performance across a wide temperature range from low temperatures to high temperatures. The gas diffusion electrode medium is characterized by a microporous region being disposed at least at one surface of an electrode substrate, and the microporous region containing flake graphite having an aspect ratio of 50-5000.
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