Method of surface cross-linking superabsorbent polymer...

Details Method of surface cross-linking superabsorbent polymer... Method of surface cross-linking superabsorbent polymer...

2006-08-22

2010-11-23

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S001000, C522S005000, C522S006000, C522S071000, C528S480000, C528S487000, C528S490000, C508S459000, C508S468000, C525S329400

Reexamination Certificate

active

07838569

ABSTRACT:
The present invention relates to a method of surface cross-linking superabsorbent polymer particles using UV irradiation. The superabsorbent polymer particles for use in the method of the present invention have a relatively high degree of neutralization. Bronsted 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.

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