Alkenylsuccinic anhydride composition and method of using...

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 2509570

The invention relates to an aqueous sizing composition comprising (a) an emulsion comprising an alkenylsuccinic anhydride component containing alkenylsuccinic anhydride particles suspended in a first starch component containing emulsifying starch selected from the group consisting of non-ionic starches, ionic starches, and mixtures thereof, and (b) a second starch component selected from the group consisting of non-ionic starches, ionic starches and mixtures thereof, such that the alkenylsuccinic anhydride and the starch in the emulsion and the second starch component are present at a starch: alkenylsuccinic anhydride weight ratio that is sufficiently high 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 the sizing composition, processes for making the composition and processes for using such a composition, and other compositions. In one embodiment, alkylene ketene dimer is used instead of alkenylsuccinic anhydride.

Cette invention concerne une composition d'encollage aqueuse comprenant (a) une émulsion renfermant un composant anhydride alcénylsuccinique contenant des particules d'anhydride alcénylsuccinique en suspension dans un premier composant amylacé contenant de l'amidon émulsionnant sélectionné dans le groupe renfermant des amidons non ioniques, des amidons ioniques ainsi que des mélanges de ceux-ci ; et (b) un second composant amylacé sélectionné dans le groupe renfermant des amidons non ioniques, des amidons ioniques et des mélanges de ceux-ci, de façon que l'anhydride alcénylsuccinique et que l'amidon contenus dans l'émulsion et que le second amidon soient présents selon un rapport amidon/anhydride alcénylsuccinique suffisamment élevé 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 d'encollage, des procédés de production de cette composition ainsi que des procédés d'utilisation de cette composition ainsi que d'autres compositions. Dans un mode de réalisation, un dimère alkylène cétène est utilisé à la place de l'anhydride alcénylsuccinique.

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