Poly(vinyl alcohol) copolymer ionomers, their preparation...

D - Textiles – Paper – 06 – M

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D06M 15/00 (2006.01) C08F 8/12 (2006.01) C08F 8/44 (2006.01) D06M 15/11 (2006.01) D06M 15/263 (2006.01) D06M 15/333 (2006.01)

Patent

CA 2335800

Compositions and textile sizes based on those compositions, which are particular poly(vinyl alcohol) copolymer ionomers, as well as blends of those ionomers with other sizing polymers are described. A process to prepare the ionomers is described. The compositions are poly(vinyl alcohol) copolymers which have carboxylic acid ionomer comonomer units. Sizes based on these ionomers are aqueous solutions of the ionomers or solutions of blends of them with other poly(vinyl alcohol) polymers which are not ionomeric, or solution/suspensions of the ionomers with various starches, or both. Desizing in either water or caustic solutions is generally far superior to comparable polymer blends which contain no poly(vinyl alcohol) copolymer ionomer.

L'invention concerne des compositions et des encollages de textiles sur la base de ces compositions composées d'ionomères de copolymères de poly(alcool de vinyle) particuliers, ainsi que de mélanges de ces ionomères avec d'autres polymères d'encollage. L'invention concerne notamment un procédé de préparation de ces ionomères. Les compositions sont des copolymères de poly(alcool de vinyle) possédant des unités de comonomères d'ionomères d'acide carboxylique. Les agents d'encollage sur la base de ces ionomères consistent en solutions aqueuses de ces ionomères ou en solutions formées de leur mélange avec d'autres polymères de poly(alcool de vinyle) non ionomères ou de solutions/suspensions des ionomères avec plusieurs amidons, ou des deux. Un désencollage dans de l'eau ou dans des solutions caustiques est en général bien meilleur que dans le cas de mélanges polymères ne contenant pas d'ionomère de copolymère de poly(alcool de vinyle).

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