A process for the treatment of fibre material and new...

D - Textiles – Paper – 21 – C

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D21C 9/16 (2006.01) D21C 5/02 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2554056

The invention relates to a process for the treatment of a fibre material comprising the step of contacting the fibre material in an aqueous medium with a chelating agent and a polymer having general formula (I) wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms; R2 is -COOM or -CH2COOM; M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof; n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol. The invention also relates to a composition comprising a chelating agent and the above polymer.

L'invention concerne un procédé de traitement d'un matériau fibreux qui consiste à mettre ce dernier en contact dans un milieu aqueux avec un agent de chélation et un polymère représenté par la formule générale (I), dans laquelle R¿1? représente un atome d'hydrogène ou un groupe alkyle contenant entre 1 et 12 atomes de carbone ; R¿2? représente -COOM ou -CH¿2?COOM ; M représente un atome d'hydrogène, un ion de métal alcalin, un ion de métal alcalino-terreux, un ion ammonium ou un mélange de ceux-ci ; n, m et k représentent des ratios molaires de monomères correspondants, où n vaut de 0 à 0,95, m vaut de 0,05 à 0,9 et k vaut de 0 à 0,8 et (n+m+k) = 1 et le poids moléculaire moyen est compris entre 500 et 20.000.000 g/mol. L'invention concerne également une composition qui contient un agent de chélation et ledit polymère.

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