Patent ID: 8871880

Claim:
A superabsorbent copolymer comprising a reaction product of a) from 0.00001 wt % to about 1 wt % based on the superabsorbent copolymer of a reactive optical brightener comonomer and a monomer solution comprising b) from about 55 wt % to about 99.9 wt % of polymerizable unsaturated acid group containing monomer wherein the polymerizable unsaturated acid group containing monomer is neutralized with a neutralization agent to at least 50 mol %; c) from 0.001 wt % to about 5.0 wt % based on the weight of a) of an internal crosslinking agent, wherein the components a), b), and c) are polymerized into a superabsorbent copolymer having a color coordinate b* of from about −1 to about 4.33.