C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 8/44 (2006.01) A61L 15/00 (2006.01)
Patent
CA 2403966
The invention relates to a surface post-crosslinked powder polymer, which is water-, or aqueous liquid-absorbing and produced from polymerised, optionally pre-crosslinked, partly neutralised, carboxyl-group-containing monomers. The invention further relates to a method for the post-treatment of said polymer and the use of a solution of a salt of an at least tri-valent cation for the regeneration of the gel-permeability of said polymer, when damaged by physical effects.
La présente invention concerne un polymère en poudre, post-réticulé en surface et absorbant l'eau ou les liquides aqueux, constitué de monomères polymérisés, éventuellement pré-réticulés, et contenant des groupes carboxyle partiellement neutralisés. Ladite invention concerne également un procédé de traitement ultérieur desdits polymères et l'utilisation d'une solution d'au moins un sel d'un cation au moins trivalent pour le rétablissement de la perméabilité du gel desdits polymères, lorsqu'ils ont été endommagés par des effets mécaniques.
Bohlmann Heinz-Peter
Hose Rudiger
Inger Waldemar
Smart & Biggar
Stockhausen Gmbh & Co. Kg
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