Determination of epoxy and isocyanate groups in the presence of each other

Analytical reactions for the determination of epoxy and isocyanate groups in the presence of each other in epoxy-isocyanate compositions were studied. For the determination of epoxy groups in the presence of isocyanate groups, a test with HBr in glacial acetic acid was proposed; acetic acid reacts with isocyanate groups and, hence, masks them. Isocyanate groups in the presence of epoxy groups were determined by potentiometric titration with a solution of piperidine in ethyl methyl ketone. The addition of toluene to the test solution decreases the fraction of the enol form of ethyl methyl ketone, which interferes with the determination.

Authors
Evtushenko Yu.M.1 , Ivanov V.M.2 , Zaitsev B.E. 3
Journal
Journal of Analytical Chemistry
Number of issue
5
Language
English
Pages
439-442
Status
Published
Link
External link
DOI
10.1023/A:1015417826862
Volume
57
Year
2002
Organizations
  • 1 AOZT Elektroizolit, Khot'kovo, Sergiev-Posad raion, Moscow Oblast, 141350, Russian Federation
  • 2 Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, 119899, Russian Federation
  • 3 Peoples Friendship University, ul. Ordzhonikidze 3, Moscow, 119517, Russian Federation
Keywords
2 butanone; epoxide; isocyanic acid derivative; piperidine; toluene; addition reaction; analytic method; aqueous solution; article; experimental test; fractionation; molecular dynamics; molecular interaction; molecular mechanics; potentiometric titration; reaction analysis
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/203/
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