公开(公告)号：US20190074517A1

公开(公告)日：2019-03-07

申请号：US16082720

申请日：2017-03-30

申请人： SEKISUI CHEMICAL CO., LTD.

发明人： Ayako OOTA

IPC分类号： H01M4/62 ,  H01M10/0525 ,  H01M4/131 ,  C08F18/08

摘要： The present invention aims to provide a composition for a lithium secondary battery electrode which is excellent in dispersibility of an active material and adhesiveness, capable of maintaining an appropriate viscosity for a long period of time, and capable of providing a high-capacity lithium secondary battery even when the amount of a binder is small. Provided is a composition for a lithium secondary battery electrode including: an active material; a polyvinyl acetal resin; and an organic solvent, the polyvinyl acetal resin having a structural unit having a hydroxyl group represented by the following formula (1), a structural unit having an acetal group represented by the following formula (2), and a structural unit having a carboxyl group, the polyvinyl acetal resin containing 45 to 95 mol % of the structural unit having a hydroxyl group represented by the following formula (1): where R1 represents a hydrogen atom or a C1-C20 alkyl group.

公开(公告)号：US20240294717A1

公开(公告)日：2024-09-05

申请号：US18693610

申请日：2022-09-22

申请人： Sekisui Chemical Co., Ltd.

发明人： Haruka YOSHIDA ,  Ayako OOTA

IPC分类号： C08J5/04 ,  C08J5/24 ,  C08L63/00

CPC分类号： C08J5/042 ,  C08J5/243 ,  C08L63/00 ,  C08J2363/00 ,  C08J2433/06

摘要： The present invention provides a carbon-fiber-reinforced composite material having excellent tackiness, excellent compatibility with epoxy resins, and excellent interfacial adhesion while being capable of achieving high mechanical strength and reducing the occurrence of voids, and a method for producing a carbon-fiber-reinforced composite material. Provided is a carbon-fiber-reinforced composite material containing: carbon fibers; an epoxy resin; a curing agent; and a thermoplastic resin, wherein a mixture of the epoxy resin and the thermoplastic resin has a ratio of viscosity at 30° C. to viscosity at 90° C. (viscosity at 30° C./viscosity at 90° C.) of 100 or greater.

公开(公告)号：US20180062178A1

公开(公告)日：2018-03-01

申请号：US15558436

申请日：2016-03-18

申请人： SEKISUI CHEMICAL CO., LTD.

发明人： Ayako OOTA

IPC分类号： H01M4/62 ,  H01M4/13 ,  H01M10/052

CPC分类号： H01M4/622 ,  H01M4/04 ,  H01M4/13 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0525

摘要： The present invention aims to provide a composition for a lithium secondary battery electrode which is excellent in dispersibility of an active material and adhesiveness to a current collector and is capable of producing a high-capacity lithium secondary battery. The present invention relates to a composition for a lithium secondary battery electrode including: an active material; a binder; and an organic solvent, the binder containing a polyvinyl acetal resin, the binder having a Na ion content of 100 ppm or less.