Patent ID: 7528291
Filing Date: 2009-05-05
Classification: A61L,C08F,C08J,Y10T

Abstract:
1. A method of manufacturing color-stable superabsorbent polymer particles comprising the steps of: (a) forming a monomer mixture comprising: (b) polymerizing the monomer and the crosslinking agent in the monomer mixture to form a superabsorbent polymer hydrogel having a water content of 25 wt.% or less; (c) subjecting the superabsorbent polymer hydrogel to a UV radiation of 2000 milliwatt/cm (d) then comminuting the superabsorbent polymer hydrogel to provide superabsorbent hydrogel particles; and (e) drying the superabsorbent polymer hydrogel particles for a sufficient time at a sufficient temperature to provide the color-stable superabsorbent polymer particles.