Textile substrates having durable water repellency and soil...

D - Textiles – Paper – 06 – M

Patent

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Details

D06M 15/256 (2006.01) D06M 15/263 (2006.01) D06M 15/27 (2006.01) D06M 15/277 (2006.01) D06M 15/285 (2006.01) D06M 15/507 (2006.01)

Patent

CA 2415762

A process for imparting durable water and oil repellency and durable soil release characteristics comprises the application of an aqueous mixture having a water repellent component such as a fluorocarbon polymer and a separate hydrophilic soil release polymer to a textile substrate, followed by a drying step. Optionally, a curing or thermosetting step may also be employed, if desired. This process is carried out in a preferred embodiment in a generally mild pH, which allows the process to be performed on a wide variety of textile substrates that may not be capable of withstanding more extreme pH values. Polyamides, aramids, polyesters, and poly/cotton substrates, when treated according to the present process, have all yielded improved performance with respect to durable water and oil repellency and durable soil release characteristics. A novel mixture or bath and novel treated substrates are also disclosed.

Cette invention a trait à un procédé permettant de rendre un produit hydrophobe et oléfuge et de le rendre apte au lavage et ce, de manière durable. Ce procédé consiste à appliquer sur un substrat textile un mélange aqueux contenant un composant hydrophobe tel qu'un polymère fluorocarboné et un polymère hydrophile favorisant l'aptitude au lavage, cette application étant suivie d'un séchage. Le cas échéant, on peut éventuellement faire appel à un durcissement ou à un thermodurcissement. Dans un mode de réalisation préféré, le processus se déroule dans un environnement à pH moyen, ce qui permet d'appliquer le procédé à une large gamme de substrats textiles qui ne supporteraient pas des valeurs extrêmes de pH. Des polyamides, des aramides, des polyesters et des substrats poly/coton traités au moyen du procédé selon l'invention ont tous un rendement amélioré s'agissant de caractéristiques durables de répulsivité à l'eau et à l'huile ainsi que d'aptitude au lavage. L'invention concerne également un mélange et un bain nouveaux ainsi que de nouveaux substrats traités.

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