C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/28 (2006.01) A61L 15/60 (2006.01)
Patent
CA 2620170
The present invention relates to absorbent articles comprising surface cross- linked superabsorbent polymer particles, the superabsorbent polymer particles being made by a method using UV irradiation. The superabsorbent polymer particles for use in the method of the present invention have a relatively high degree of neutralization. Brønsted acids are selectively applied onto the surface of the superabsorbent polymer particles to selectively facilitate a relatively high number of protonated carboxyl groups at the surface of the superabsorbent polymer particles while the relatively high degree of neutralization in the core of the superabsorbent polymer particles remains substantially unaffected.
L'invention concerne des articles absorbants comprenant des particules polymères superabsorbantes réticulées en surface qui sont obtenues par un procédé faisant appel à un rayonnement ultraviolet. Ces particules utilisées dans le procédé selon l'invention présentent un niveau relativement élevé de neutralisation. Les acides de Brönsted sont appliqués sélectivement sur la surface des particules polymères superabsorbantes afin de contribuer à un nombre relativement élevé de groupes carboxyle protonés à la surface de ces particules polymères superabdorbantes, tandis que le niveau relativement élevé de neutralisation dans le noyau de ces particules demeure sensiblement non affecté.
Flohr Andreas
Lindner Torsten
Mitsukami Yoshiro
Dimock Stratton Llp
The Procter & Gamble Company
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