公开(公告)号：US10538674B2

公开(公告)日：2020-01-21

申请号：US15971539

申请日：2018-05-04

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Masanobu Naito ,  Debabrata Payra

IPC: C09D199/00 ,  C09D5/00 ,  C09D5/14 ,  C23F11/00 ,  C09D5/08 ,  B05D7/24

Abstract: A method of forming anti-rust or anti-bacterial film includes mixing a predetermined liquid and a film-forming composition which contains a tannic acid derivative in which hydrogen atoms in at least 10% of hydroxyl groups of tannic acid are substituted by a chain hydrocarbon group having 10 to 16 carbon atoms, and removing the liquid.

公开(公告)号：US10177383B2

公开(公告)日：2019-01-08

申请号：US15129911

申请日：2015-03-30

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Masanobu Naito ,  Debabrata Payra ,  Sachiko Hiromoto ,  Alok Singh

IPC: H01M4/62 ,  H01M4/68 ,  H01M10/0525 ,  B05D7/14 ,  B05D1/18 ,  C09D133/26 ,  C23F15/00 ,  C09D133/04 ,  C09D201/00 ,  H01M4/66 ,  C08F20/18 ,  C08F20/56 ,  C08F20/58 ,  C08F220/18 ,  B05D5/08

Abstract: A nano-coating material, capable of being bonded to the surface of a metal or an alloy substrate, the nano-coating material includes a compound having, in a polymer main chain, (A) a first side chain or a terminal, each having a binding group containing a benzene ring having at least one pair of adjacent hydroxyl groups; and (B) a functional second side chain.

公开(公告)号：US11634617B2

公开(公告)日：2023-04-25

申请号：US16478369

申请日：2017-12-20

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Masanobu Naito ,  Sandip Das ,  Debabrata Payra

IPC: C09J199/00 ,  C09J7/35 ,  C08G18/73 ,  C08G18/75 ,  C08G18/76 ,  C08K3/013 ,  C08K3/08 ,  C08K3/26 ,  C08K5/1515 ,  C08K5/1535 ,  C08K7/14

Abstract: The present invention has for its object to provide an adhesive composition that is based on a naturally occurring material less likely to have adverse influences on the human body and has a tensile shear strength (adhesive strength) of at least 1 MPa with respect to a variety of adherends. The present invention provides an adhesive composition including at least a first pack and a second pack, wherein the first pack contains a tannic acid derivative in which a hydrogen atom in at least some hydroxyl group of tannic acid is substituted by a chain hydrocarbon group having at least one hydroxyl group, and the second pack contains a hydrocarbon having at least two cyanate groups or a derivative of the hydrocarbon.

公开(公告)号：US11008457B2

公开(公告)日：2021-05-18

申请号：US16303487

申请日：2017-05-26

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Masanobu Naito ,  Joginder Bansal ,  Debabrata Payra

IPC: C08L75/04 ,  C08G18/10 ,  C08G18/32 ,  C08G18/42 ,  C08G18/64 ,  C08G18/73 ,  C08J5/18 ,  C08J7/12 ,  C08L99/00

Abstract: A self-supporting multifunctional film is provided based on natural poly-phenols such as tannic acid. The self-supporting film composition of the invention contains a tannic acid derivative in which 12% to 24% of hydroxyl groups in tannic acid are bonded via urethane bonds that are formed by way of reactions with cyanate groups. Preferably, the film composition further includes a precursor polymer and 45 to 65% by mass of tannic acid and 55 to 35% by mass of the precursor polymer. Preferably, the precursor polymer has a second linear hydrocarbon compound urethane-bonded to both ends of a first linear hydrocarbon compound, and more preferably a diisocyanate group having an oligoethyene glycol as a spacer. Preferably, the ratio of the urethane bonds contained in the precursor polymer to the hydroxyl groups contained in the tannic acid is (12:88) to (24:76) inclusive in terms of molar ratio.