MISCELA ALCALINO-SOLUBILE COMPOSTA DA DERIVANTI DELLA CELLULOSA

One object of the present invention is to provide a mixture composed of 1) a cellulose ether derivative esterified at least with a biprotic acid group derivative expressed by the formula HOOC-B-COOH (I), wherein B is a linear aliphatic group represented by (CH2)x with x a positive integer from 1 to...

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Bibliographische Detailangaben
Hauptverfasser:	TAVELLA LUISA, BARLOCCO CARLO, PUPPO PAOLA, VALSECCHI ALBERTO
Format:	Patent
Sprache:	ita
Schlagworte:	ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES AUXILIARY PROCESSES IN PHOTOGRAPHY CANDLES CHEMISTRY CINEMATOGRAPHY DETERGENT COMPOSITIONS DETERGENTS ELECTROGRAPHY FATTY ACIDS THEREFROM HOLOGRAPHY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES RECOVERY OF GLYCEROL RESIN SOAPS SOAP OR SOAP-MAKING USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	One object of the present invention is to provide a mixture composed of 1) a cellulose ether derivative esterified at least with a biprotic acid group derivative expressed by the formula HOOC-B-COOH (I), wherein B is a linear aliphatic group represented by (CH2)x with x a positive integer from 1 to 5 or is a 5-member or 6-member cycloaliphatic group and 2) a cellulose or cellulose derivative esterified at least with a phthalic acid derivative represented by the following formula (II). wherein R1 is an alkyl group and y is a positive integer from 0 to 3. Said mixture shows an enhanced stability against hydrolysis when subjected to conditioning at high relative humidity and temperature. The composition may be useful in order to get antihalation layer on photographic films as well as enteric coating of pharmaceutical dosage and for controlled-release applications such as for cleaning formulation.