C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/24 (2006.01) A61L 15/60 (2006.01) C08F 8/00 (2006.01) C08F 8/14 (2006.01) C08G 81/02 (2006.01) C08J 3/28 (2006.01) C08L 101/14 (2006.01)
Patent
CA 2620908
The present invention relates to a method of surface cross-linking superabsorbent polymer particles having 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.
La présente invention concerne un procédé de réticulation de surface de particules polymères superabsorbantes qui présentent un degré relativement élevé de neutralisation. Des acides de Brønsted sont appliqués de manière sélective sur la surface des particules polymères superabsorbantes, de manière à favoriser de façon sélective un nombre relativement important de groupes carboxyle protonés à la surface des particules polymères superabsorbantes, alors que le degré relativement élevé de neutralisation dans le noyau des particules polymères superabsorbantes reste sensiblement inchangé.
Flohr Andreas
Lindner Torsten
Meyer Axel
Dimock Stratton Llp
The Procter & Gamble Company
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