公开(公告)号：US20210040304A1

公开(公告)日：2021-02-11

申请号：US16981805

申请日：2019-03-26

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Shiori TATENO ,  Tasuku YAMADA ,  Yousuke CHIBA

IPC: C08L29/14 ,  C08L63/00

Abstract: The present invention provides an epoxy resin composition that is provided with flexibility to combine impact resistance and mechanical strength, while maintaining epoxy resin-specific high elastic modulus, that reduces an increase in viscosity due to mixing, and that is excellent in heat resistance, storage stability, and solvent resistance. Provided is an epoxy resin composition containing: a modified polyvinyl acetal resin having a constitutional unit with an acid-modified group; a reactive diluent; and an epoxy resin, the epoxy resin composition having a sea-island phase separated structure after being cured.

公开(公告)号：US20210002528A1

公开(公告)日：2021-01-07

申请号：US17040761

申请日：2019-03-11

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Tasuku YAMADA ,  Shiori TATENO ,  Yousuke CHIBA ,  Takayuki MAEDA ,  Yukio OCHITANI ,  Hideaki TANAKA

IPC: C09J163/00 ,  C09J11/04

Abstract: The present invention provides an epoxy adhesive composition capable of reducing re-aggregation of an adhesive layer modifier, maintaining favorable viscosity for a long period of time, exhibiting high adhesiveness, and reducing process failures during application of the adhesive. Provided is an epoxy adhesive composition containing: a modified polyvinyl acetal resin having a constitutional unit with an acid-modified group; an adhesive layer modifier; and an epoxy resin, the epoxy adhesive composition having a ratio of an acid-modified group equivalent of the modified polyvinyl acetal resin to an epoxy equivalent of the epoxy resin (acid-modified group equivalent/epoxy equivalent) of 5.0 to 150.0, the epoxy adhesive composition having a number ratio of the acid-modified group to an epoxy group (acid-modified group number/epoxy group number) of 0.0005 to 0.5.