METHOD OF DETERMINING HYDROXYL GROUP CONCENTRATION IN AND 4,4'- ISOPROPYLIDENEDIPHENOL-EPOXIDE RESINS

METHOD OF DETERMINING HYDROXYL GROUP CONCENTRATION IN AND 4,4'- ISOPROPYLIDENEDIPHENOL-EPOXIDE RESINS

analytical methods. SUBSTANCE: resin is treated with 0.1-0.2 M solution of maleic anhydride in methyl ethyl ketone in presence of 0.5-1 M solution of triethylamine in methyl ethyl ketone as catalyst at elevated temperature. Unreacted anhydride is then hydrolyzed and hydroxyl group concentration is d...

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Hauptverfasser: IVANOV V.M, EVTUSHENKO JU.M, ZAJTSEV B.E, EVTUSHENKO G.JU, BERLIN A.A, KHALTURINSKIJ N.A
Format: Patent
Sprache:eng
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Zusammenfassung:analytical methods. SUBSTANCE: resin is treated with 0.1-0.2 M solution of maleic anhydride in methyl ethyl ketone in presence of 0.5-1 M solution of triethylamine in methyl ethyl ketone as catalyst at elevated temperature. Unreacted anhydride is then hydrolyzed and hydroxyl group concentration is determined by potentiometric titration with alkali. EFFECT: increased accuracy and reproducibility of determination at reduced power consumption and shortened analysis time. 2 tbl, 3 ex