STRUCTURED KOALINS USED TO FILL PAPER

An opacifying pigment for filling paper comprising particles obtainable by flocculating hydrous kaolin clay in the presence of water with cationic polyelectrolyte flocculant in amount in excess of that necessary to achieve flocculation but insufficient to redeflocculate said kaolin, said flocculated...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RICHARD R. BERUBE, ROBERT J. KOSTELNIK, STANLEY S. MACK, SAADALLAH NEMEH
Format:	Patent
Sprache:	eng
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:	An opacifying pigment for filling paper comprising particles obtainable by flocculating hydrous kaolin clay in the presence of water with cationic polyelectrolyte flocculant in amount in excess of that necessary to achieve flocculation but insufficient to redeflocculate said kaolin, said flocculated particles of clay when dry having scattering values at 577 nm higher than that of said clay flocculated with minimal amount of said polyelectrolyte.