Title:
METHOD FOR MEASURING ACID ANHYDRIDE CONTENT
Document Type and Number:
WIPO Patent Application WO/2020/137623
Kind Code:
A1
Abstract:
In the present invention, in a first step S101, a specimen composed of a polyester or a polyester degradation product is dissolved in a pre-processing liquid containing a secondary amine to obtain a reaction product (amide) of the specimen. In a second step S102, amide, which is the reaction product obtained, is mixed with a solvent (measuring solvent) containing deuterated chloroform and deuterated 1,1,1,3,3,3-hexafluoro-2-propanol to produce a specimen liquid. In a third step S103, nuclear magnetic resonance spectroscopy for hydrogen atoms is used to quantify the amide in the specimen liquid to determine the amount of acid anhydride in the specimen.
Inventors:
ISHII AZUSA (JP)
MIWA TAKASHI (JP)
WATANABE MASAMITSU (JP)
OKA SOICHI (JP)
MIWA TAKASHI (JP)
WATANABE MASAMITSU (JP)
OKA SOICHI (JP)
Application Number:
PCT/JP2019/048939
Publication Date:
July 02, 2020
Filing Date:
December 13, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01N24/08
Foreign References:
| JP2017219519A | 2017-12-14 | |||
| JP2017219517A | 2017-12-14 | |||
| JP2001201471A | 2001-07-27 | |||
| JP2011163797A | 2011-08-25 | |||
| US20030157722A1 | 2003-08-21 |
Other References:
STAMATAKIS, GEORGIOS: "Analysis and aging of unsaturated polyester resins in contemporary a installations by NMR spectroscopy", ANAL BIOAN CHEM, vol. 398, 2010, pages 3203 - 3214, XP019863984, DOI: 10.1007/s00216-010-4233-3
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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