Composition, use of a cellulose ether as thickening agent...

Details Composition, use of a cellulose ether as thickening agent... Composition, use of a cellulose ether as thickening agent...

D - Textiles, Paper

21

H

D21H 17/26 (2006.01) C09D 201/00 (2006.01) D21H 19/52 (2006.01) D21H 21/16 (2006.01) C08L 1/28 (2006.01) D21H 19/38 (2006.01) D21H 19/40 (2006.01) D21H 19/58 (2006.01)

Patent

CA 2253814

The present invention relates to an aqueous composition for coating, such as sizing or application of a layer of a coating slip, of cellulose-based two-dimensional products. The composition has improved properties at increased temperatures and at high shear rates. These properties are achieved by using as tickening agent a cellulose ether which is substituted with hydroxyalkyl groups, such as hydroxyethyl and hydroxypropyl, and alkyl groups having 1-3 carbon atoms, and which has a cloud point in the range from 35 °C to 80 °C.

Composition aqueuse destinée à être appliquée sous forme de revêtement, par exemple pour l'encollage ou l'application d'une couche de sauce de couchage, sur des produits bidimensionnels à base de cellulose. Cette composition présente des propriétés améliorées à de plus hautes températures et à des vitesses de cisaillement élevées. On confère à cette composition de telles propriétés en utilisant comme agent épaississant un éther de cellulose substitué par des groupes hydroxyalkyle, tels que l'hydroxyéthyle et l'hydroxypropyle, et des groupes alkyle renfermant 1 à 3 atomes de carbone, et qui présente un point de trouble compris entre 35 DEG C et 80 DEG C.

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