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公开(公告)号：US20230349083A1
公开(公告)日：2023-11-02
申请号：US17800658
申请日：2021-02-22
Applicant: TEIJIN LIMITED
Inventor： Tetsuya AKAMATSU , Kohei OSAKI , Toru KANEKO
Abstract: An object of the present invention is to provide a stitched fiber-reinforced substrate material capable of suppressing the formation of microcracks in a fiber reinforced composite material. The stitched fiber-reinforced substrate material of the present invention is a stitched fiber-reinforced substrate material formed by stitching reinforcement fiber sheets made of reinforcement fibers using stitching yarns, to which an organic compound having a polar group is adhered. The organic compound having a polar group is preferably a compound having a polyoxyalkylene structure, and also preferably a compound having an epoxy group. The organic compound having a polar group is preferably adhered in an amount of 0.1 to 10 wt % with respect to the mass of the stitching yarn.
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公开(公告)号：US20240336751A1
公开(公告)日：2024-10-10
申请号：US18681678
申请日：2022-07-27
Applicant: Teijin Limited
Inventor： Kohei OSAKI , Suguru OZAWA , Toru KANEKO
CPC classification number: C08J5/042 , C08G59/245 , C08G59/28 , C08G59/3218 , C08G59/3227 , C08G59/38 , C08G59/5033 , C08J5/243 , C08J2363/00
Abstract: A fiber-reinforced composite material contains a resin cured product obtained by curing an epoxy resin composition containing a curing agent A, a curing agent B, a curing agent C, an epoxy resin D, an epoxy resin E, and resin particles F, and a stitched reinforcing fiber base material. The fiber-reinforced composite material enables a fiber-reinforced composite material to be provided that achieves high productivity, and exhibits heat resistance and mechanical properties while using an epoxy resin composition that has low viscosity, a long pot life, and fast curability.
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公开(公告)号：US20230139781A1
公开(公告)日：2023-05-04
申请号：US17798791
申请日：2021-02-22
Applicant: Teijin Limited
Inventor： Tetsuya AKAMATSU , Kohei OSAKI , Toru KANEKO
Abstract: An object of the present invention is to provide a stitched fiber-reinforced substrate material capable of suppressing the formation of microcracks in a fiber reinforced composite material. The stitched fiber-reinforced substrate material of the present invention is a fiber-reinforced substrate material formed by stitching reinforcement fiber sheets made of reinforcement fibers using stitching yarns, and the stitching yarn has a linear expansion coefficient in the fiber axial direction of −1×10−6 to 70×10−6/K after being heated at 180° C. for 2 hours and then cooled. The stitching yarn is preferably a stitching yarn to which an organic compound having a polar group is adhered.
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Patent Agency Ranking
公开(公告)号：US20230124757A1
公开(公告)日：2023-04-20
申请号：US17914630
申请日：2021-02-22
Applicant: TEIJIN LIMITED
Inventor： Tetsuya AKAMATSU , Kohei OSAKI , Toru KANEKO
Abstract: An object of the present invention is to provide a stitched fiber-reinforced substrate material capable of suppressing the formation of microcracks in a fiber reinforced composite material. The stitched fiber-reinforced substrate material of the present invention is a stitched fiber-reinforced substrate material formed by stitching reinforcement fiber sheets made of reinforcement fibers using stitching yarns that exhibit an in-plane shear strength transition rate of 5% or more. The stitching yarn is preferably adhered by an organic compound having a polar group.
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公开(公告)号：US20210107250A1
公开(公告)日：2021-04-15
申请号：US16496569
申请日：2018-03-22
Applicant: Teijin Limited
Inventor： Atsushi KAWAKAMI , Matthias SCHUBERT , Toru KANEKO
IPC: B32B5/26 , B32B5/02 , B32B3/12 , B32B7/12 , B32B37/12 , B32B37/14 , B29B11/16 , B29B15/12 , B29C70/68 , B29C70/78
Abstract: The present invention provides a self-adhesive prepreg which is characterized by comprising: a base prepreg that is composed of reinforcing fibers and a thermosetting resin composition (I), some or all of which is impregnated into a reinforcing fiber layer that is formed of the reinforcing fibers; an adhesive layer that is composed of a nonwoven fabric which is laminated on at least one surface of the base prepreg so as to be integrated with the base prepreg and a thermosetting resin composition (II) which is laminated on the surface of the nonwoven fabric so as to be integrated with the nonwoven fabric.
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6.发明公开公开(公告)号：US20240141096A1
公开(公告)日：2024-05-02
申请号：US18278138
申请日：2022-02-28
Applicant: TEIJIN LIMITED
Inventor： Suguru OZAWA , Akimichi ODA , Kohei OSAKI , Toru KANEKO
CPC classification number: C08G59/5033 , C08G59/245 , C08G59/28 , C08G59/3227 , C08G59/38 , C08J5/042 , C08L9/00 , C08J2363/00 , C08L2205/025 , C08L2205/03 , C08L2205/22
Abstract: An epoxy resin composition contains a curing agent A, a curing agent B, a curing agent C, an epoxy resin D, an epoxy resin E, and resin particles F, wherein the curing agent A is an aromatic polyamine having a substituent selected from an alkyl group, an aromatic group, and a halogen group at each of two ortho positions of an amino group, the curing agent B is an aromatic polyamine that is liquid at 25° C., and the curing agent C is an aromatic polyamine having only one electron donating substituent or no substituent at an ortho position of an amino group, the epoxy resin D is constituted by an epoxy resin which is composed of a monomer containing 4 or more glycidyl groups, and the epoxy resin E is constituted by an epoxy resin which is composed of a monomer containing 2 or 3 glycidyl groups.
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公开(公告)号：US20220332939A1
公开(公告)日：2022-10-20
申请号：US17642383
申请日：2019-09-12
Applicant: TEIJIN LIMITED
Inventor： Suguru OZAWA , Toru KANEKO , Kohei OSAKI
Abstract: The present invention provides an epoxy resin composition containing:
an epoxy resin [A] that is a compound represented by Chemical formula (1) shown below: wherein R1 to R4 each independently represent one selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, and a halogen atom, and X represents one selected from —CH2—, —O—, —S—, —CO—, —C(═O)O—, —O—C(═O)—, —NHCO—, —CONH—, and —SO2—;
a bifunctional epoxy resin [B] having an amine type glycidyl group;
a curing agent [C] containing an aromatic polyamine, and having at least one substituent selected from an aliphatic substituent, an aromatic substituent, and a halogen atom at an ortho position with respect to an amino group; and
a particulate rubber component [D].-
公开(公告)号：US20210024713A1
公开(公告)日：2021-01-28
申请号：US16980100
申请日：2019-03-12
Applicant: TEIJIN LIMITED
Inventor： Mizuki SASAKI , Toru KANEKO
Abstract: The present invention provides a prepreg including a fiber-reinforced substrate composed of a carbon fiber and an epoxy resin composition with which the fiber-reinforced substrate is partially or wholly impregnated, the prepreg being characterized in that the epoxy resin composition includes an epoxy resin, dicyandiamide, and an aromatic amine having a structure of Chemical Formula (1) in which at least one substituent other than a hydrogen atom is included in an ortho position with respect to an amino group.
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