C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 101/04 (2006.01) C08B 15/02 (2006.01) C08L 1/02 (2006.01) D21H 17/24 (2006.01) D21H 19/00 (2006.01) D21H 19/52 (2006.01) D21H 19/54 (2006.01) D21H 21/30 (2006.01) D21H 23/22 (2006.01) D21H 19/44 (2006.01)
Patent
CA 2370175
A paper coating composition has therein an optical brightening agent (OBA) and a water-soluble non-ionic polysaccharide derivative, exhibiting a solution viscosity in water of less than 1500 cps when dissolved at 5% polymer concentration, wherein the paper coating provides improved optical brightness as compared to the same formulation without said non-ionic, polysaccharide derivative. A paper coated with this composition has an optical brightness value of greater than 70.
La présente invention concerne une composition de la sauce de couchage de papier comportant un azurant optique (OBA) et un dérivé de polysaccharide hydrosoluble non ionique, présentant une viscosité de solution dans l'eau inférieure à 1500 cps lorsqu'il est dissout à une concentration polymère de 5 %, le couchage de papier présentant alors une brillance optique améliorée par rapport à la même formulation exempte de polysaccharide non ionique. En outre, on obtient avec cette composition un papier couché présentant une valeur de brillance optique supérieure à 70.
Bock Eric F.
Burdick Charles L.
Walsh L. Drake
Hercules Incorporated
Moffat & Co.
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