Improvements in the development of light-sensitive silver halide materials

Improvements in the development of light-sensitive silver halide materials

Urethans are prepared as follows: (i) methoxypolyethylene glycol (M.Wt. 750) is reacted with bromoacetyl chloride to give methoxypolyethylene glycol bromoacetate which is in turn reacted with potassium isocyanate to give methoxypolyethylene glycol isocyanatoacetate and then ethanol, n-hexadecylol, e...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MUNCK JOSEPH LOUIS DE, WILLEMS JOZEF FRANS
Format: Patent
Sprache:eng
Schlagworte:
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMISTRY
CINEMATOGRAPHY
COMPOSITIONS BASED THEREON
ELECTROGRAPHY
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
HOLOGRAPHY
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:Urethans are prepared as follows: (i) methoxypolyethylene glycol (M.Wt. 750) is reacted with bromoacetyl chloride to give methoxypolyethylene glycol bromoacetate which is in turn reacted with potassium isocyanate to give methoxypolyethylene glycol isocyanatoacetate and then ethanol, n-hexadecylol, ethylene glycol or a polyethylene glycol (M.Wt. 300 or 1000) to give the corresponding urethans or diurethans or (ii) methoxypolyethylene glycol (M.Wt. 750) is reacted with 2:5-diisocyanatotoluene or 1:6-diisocyanato-hexane to give a corresponding diurethan.