The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2025
Filed:
Aug. 19, 2020
Daicel Corporation, Osaka, JP;
DAICEL CORPORATION, Osaka, JP;
Abstract
Provided is a method for producing a surface-modified nanodiamond having its surface modified with a group containing a polyglycerin chain in an industrially efficient and safe manner, the surface-modified nanodiamond having excellent solubility or dispersibility in water and a polar organic solvent and great dispersion stability. In an aliphatic alcohol solvent having from 2 to 4 carbon atoms, a nanodiamond or a surface-modified nanodiamond having its surface modified with a group represented by Formula (1): —X—H (1), where in Formula (1), Xrepresents —NH—, —O—, —COO—, or the like, is subjected to ring-opening addition polymerization with glycidol, so as to obtain a surface-modified nanodiamond having its surface modified with a group containing a polyglycerin chain represented by Formula (2): —X—R (2), where in Formula (2), X represents a single bond, —NH—, —O—, —COO—, or the like, and R represents a polyglyceryl group.