Alkenylsuccinic anhydride surface-applied system and method...

D - Textiles – Paper – 21 – H

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D21H 21/16 (2006.01) D21H 17/16 (2006.01) D21H 17/17 (2006.01) D21H 17/28 (2006.01) D21H 17/36 (2006.01) D21H 17/37 (2006.01) D21H 21/24 (2006.01)

Patent

CA 2509574

The invention relates to an aqueous sizing composition including: (a) a first component comprising an emulsion having an alkenylsuccinic anhydride component containing alkenylsuccinic anhydride particles and a surfactant component; suspended in water; and (b) a second component selected from the group consisting of cationic starches, non-ionic starches, anionic starches, water, water- soluble polymers, and mixtures thereof; such that the alkenylsuccinic anhydride component and the second component are sufficiently diluted to enable the sizing composition to impart useful sizing properties to a fibrous substrate when the sizing composition contacts the fibrous substrate. The invention also relates to fibrous substrates treated with such a composition as well as processes for making and using the composition. In one embodiment, alkyl ketene dimer is used instead of alkenylsuccinic anhydride.

Cette invention concerne une composition d'encollage aqueuse renfermant : (a) un premier composant comprenant une émulsion renfermant un composant anhydride alcénylsuccinique contenant des particules d'anhydride alcénylsuccinique ainsi qu'un composant tensioactif en suspension dans de l'eau ; et (b) un second composant sélectionné dans le groupe renfermant des amidons cationiques, des amidons non ioniques, des amidons anioniques, de l'eau, des polymères solubles dans l'eau ainsi que des mélanges de ceux-ci, de façon que le composant anhydride alcénylsuccinique et que le second composant soient suffisamment dilués pour permettre à la composition d'encollage de conférer des propriétés de collage utiles à un substrat fibreux lorsque la composition d'encollage touche le substrat fibreux. Cette invention concerne également des substrats fibreux traités avec cette composition ainsi que des procédés de production et d'utilisation de cette composition. Dans un mode de réalisation, un dimère alkyle cétène est utilisé à la place de l'anhydride alcénylsuccinique.

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