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Superabsorbent polymers comprising direct covalent bonds between polymer chain segments and method of making them



Published March 6, 2012
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Patented is a superabsorbent polymer particle comprising polymer chain segments. The superabsorbent polymer particle having a surface that includes a plurality of evenly distributed, homogeneous surface crosslinks and a core, that includes crosslinks, wherein said surface crosslinks are direct covalent bonds formed directly between aliphatic carbon atoms of said polymer chain segments on said surface;  wherein said crosslinks in the core are substantially free of direct covalent bonds formed directly between aliphatic carbon atoms of said polymer chain segments in said core.