公开(公告)号：US20210070790A1

公开(公告)日：2021-03-11

申请号：US16980466

申请日：2019-03-14

Applicant: TOKUYAMA CORPORATION

Inventor： Takayoshi KAWASAKI ,  Junji MOMODA ,  Tomohiro KAWAMURA ,  Mayumi KISHI ,  Michihito NAKATANI

IPC: C07F9/94 ,  C08F220/06 ,  C08F212/08

Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.

公开(公告)号：US20240399319A1

公开(公告)日：2024-12-05

申请号：US18687624

申请日：2022-08-24

Applicant: ASTOM Corporation ,  TOKUYAMA CORPORATION

Inventor： Kazuo MIZUGUCHI ,  Nobuhiko OHMURA ,  Masayuki KISHINO ,  Michihito NAKATANI

IPC: B01D71/60

Abstract: The present invention provides an anion exchange membrane that has low electrical resistance when used in electrodialysis, is produced without an increase in cost, and is excellent in selective permeability to monovalent anions, and a method for producing the same. The anion exchange membrane has a tertiary amino group and a quaternary ammonium group as functional groups, such that an intensity ratio of the tertiary amino group to the quaternary ammonium group is 1.0 or more as measured by X-ray photoelectron spectroscopy on a surface of the anion exchange membrane having the tertiary amino group and the quaternary ammonium group as the functional groups.