PROCESS TO PREPARE AGGLOMERATED SUPERABSORBENT POLYMER PARTICLES COMPRISING CLAY PLATELETS WITH EDGE MODIFICATION AND/OR SURFACE MODIFICATION

摘要

Agglomerated superabsorbent polymer particles is provided and obtained by a method comprising the steps of:a) providing precursor superabsorbent polymer particles having a first mass average particle size ¹mAvPS, andb) mixing the precursor superabsorbent polymer particles with a solution comprisingi) homogeneously dispersed therein, clay platelets with opposing basal platelet surfaces and platelet edges;ii) one or more surface modification compound(s) and/or edge modification compound(s); and,iii) polymerizable monomers and/or oligomers, oriv) crosslinkable polymers,c) polymerizing the mixed solution if the solution comprises polymerizable monomers and/or oligomers or crosslinking the mixed solution if the solution comprises crosslinkable polymers. The agglomerated superabsorbent polymer particles have a second mass average particle size ²mAvPS which is at least 25% greater than the first mass average particle size ¹mAvPS.