Stabilizing agent for peroxide-bleaching procedure and...

D - Textiles – Paper – 06 – L

Patent

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D06L 3/02 (2006.01) C11D 3/39 (2006.01) D21C 9/10 (2006.01) D21C 9/16 (2006.01) D21H 21/32 (2006.01)

Patent

CA 2207884

A stabilizing agent for peroxide-bleaching procedure includes (A) a component including a homopolymer or copolymer of .alpha.-hydroxyacrylic acid or water soluble salt or polylactone of the homo- or co-polymer, (B) a component including a homopolymer or copolymer of acrylic acid, methacrylic acid and/or maleic acid and water-soluble salt of the homo- or co-polymer, (C) a component including DTPA, TTHA or water-soluble salt thereof and optionally (D) a component including a water-soluble inorganic Mg salt and is used to pretreat a fiber material with a pretreating liquid containing the stabilizing agent before bleaching with peroxide, or to bleach the fiber material by a bleaching liquid containing a peroxide bleaching agent and the stabilizing agent.

Un agent stabilisant pour le blanchiment au peroxyde comprend (A) un composé d'acide alpha-hydroxyacrylique homopolymère ou copolymère, ou un sel soluble dans l'eau ou un polylactone homo ou copolymère, (B) un composé formé d'acide acrylique, d'acide méthacrylique et (ou) maléique homopolymère ou copolymère et un sel homo ou copolymère soluble dans l'eau, (C) un composé formé d'acide pentacétique de diéthyle triamine, de TTHA ou d'un sel de ceux-ci soluble dans l'eau et, au choix, (D) un composé comprenant un sel de Mg inorganique soluble dans l'eau et utilisé pour le traitement préalable d'un matériel fibreux avec un liquide de prétraitement contenant un agent de blanchiment, avant le blanchiment au peroxyde ou pour blanchir le matériel fibreux à l'aide d'un liquide blanchissant contenant un agent blanchissant et l'agent stabilisant.

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