D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/30 (2006.01) D21H 17/68 (2006.01)
Patent
CA 2247569
A simplified method for the optical brightening of paper either in the pulp mass, the size or metering press or by coating by the use of a formulation of an optical brightening agent together with a swellable layered silicate.
Méthode simplifiée de blanchiment optique du papier, soit dans la masse de la pâte, la taille ou la pression du dosage, soit au moyen d'une pellicule, en ayant recours à la fois à une formule d'agent de blanchiment optique et de phyllosilicate dilatable.
Engelhardt Thomas
Rohringer Peter
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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