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Application filed by Augustin Constantin Crucean, Lucica Stanulet, Dan Petru Sandru, Rozalia Czifra, Octavian Marius, Beghecian GheorghefiledCriticalAugustin Constantin Crucean
Priority to RO81105665ApriorityCriticalpatent/RO81794A2/en
Publication of RO81794B1publicationCriticalpatent/RO81794B1/en
Publication of RO81794A2publicationCriticalpatent/RO81794A2/en
Procedeu de obtinere a dimetacrilatului de trietilenglicol din acid metacrilic si trietilenglicol în prezenta acidului sulfuric drept catalizator si a toluenului drept agent de antrenare a apei, care pentru inhibarea reactiilor de polimerizare se utilizeaza amestecuri sinergetice alese din fenotiazina-difenilamina, fenotiazona-nitrozo-naftol; fenotiazina-albastru de metilen, în cantitati de 0,1...0,3%, în total amestec de reactanti, în locul trietilenglicolului putîndu-se folosi amestecuri de etilenglicol, provenite de la sinteza monoetilenglicolului si continînd minim 55% trietilenglicol direct sau dupa o distilare.Process for the preparation of triethylene glycol dimethacrylate from methacrylic acid and triethylene glycol in the presence of sulfuric acid as a catalyst and toluene as a water-borne agent, which, for the inhibition of polymerization reactions, uses synergistic mixtures selected from phenothiazine-diphenylamine, phenothiazan-nitroso-naphthol; methylene blue phenotiazine in quantities of 0,1 ... 0,3% in the total mixture of reagents, instead of triethylene glycol using ethylene glycol mixtures derived from the synthesis of monoethylene glycol and containing at least 55% triethylene glycol directly or after distillation.
RO81105665A1981-10-291981-10-29
PROCESS FOR OBTAINING THE TRIETHYLENGLICOL DIMETHYLATE
RO81794A2
(en)