METODO PER MIGLIORARE LE PROPRIETA' DI BARRIERA DI UN SUBSTRATO DI CARTA

A method for improving the water and/or oil resistance of a paper substrate comprising: i) providing a paper substrate; ii) applying to the paper substrate a water-based barrier coating composition having a solids content from 10 to 55 wt% (% by weight) and comprising from 50 to 95 wt% of an aqueous...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BARCELLONA, CRISTINA, BOSSI, THIERRY, UBBIALI, MARCO, ESPOSITO, SIMONA, MASCARO, ANDREA
Format:	Patent
Sprache:	ita
Schlagworte:	IMPREGNATING OR COATING OF PAPER PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	A method for improving the water and/or oil resistance of a paper substrate comprising: i) providing a paper substrate; ii) applying to the paper substrate a water-based barrier coating composition having a solids content from 10 to 55 wt% (% by weight) and comprising from 50 to 95 wt% of an aqueous polymer dispersion having a solids content from 20 to 50 wt% and obtained by emulsion polymerization of: a) from 0 to 40% by weight of at least one ethylenically unsaturated monomer selected among styrene or substituted styrene, b) from 15 to 55% by weight of at least one ethylenically unsaturated monomer selected among C1-C10-alkyl (meth)acrylates or cycloalkyl (meth)acrylates, in the absence of ethylenically unsaturated acid monomers and in the presence of c) from 45 to 80% by weight of degraded starch having a molecular weight Mn of 500 to 30,000 Da.