Solutions of polyvinyl acetals with phenolic antioxidant in preparation for restoring and/or preserving papers

A stable monophasic composition is here taught consisting of a solution of an antioxidant and copolymers of polyvinyl acetals in a solvent mixture containing a chlorinated hydrocarbon and an aqueous solution of a basic agent. The composition is useful for restoring and preserving papers and similar...

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Hauptverfasser:	HAYWORTH, CURTIS B
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COLOUR PRINTING COMPOSITIONS BASED THEREON IMPREGNATING OR COATING OF PAPER LINING MACHINES METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES PRODUCTION OF CELLULOSE PULP COMPOSITIONS STAMPS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TYPEWRITERS USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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creator	HAYWORTH CURTIS B
description	A stable monophasic composition is here taught consisting of a solution of an antioxidant and copolymers of polyvinyl acetals in a solvent mixture containing a chlorinated hydrocarbon and an aqueous solution of a basic agent. The composition is useful for restoring and preserving papers and similar materials without discoloration.
format	Patent
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subjects	CHEMISTRY COLOUR PRINTING COMPOSITIONS BASED THEREON IMPREGNATING OR COATING OF PAPER LINING MACHINES METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES PRODUCTION OF CELLULOSE PULP COMPOSITIONS STAMPS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TYPEWRITERS USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
title	Solutions of polyvinyl acetals with phenolic antioxidant in preparation for restoring and/or preserving papers
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