Patent ID: 7427650

Claim:
An absorbing polymer composition (Pa) obtained by a process comprising the following steps: preparing an absorbing polymer comprising the step of polymerizing (α1) 0.1 to 99.999 wt. % of polymerized, ethylenically unsaturated, acid group-containing monomers or their salts, or polymerized, ethylenically unsaturated monomers containing a protonated or quaternated nitrogen atom, or their mixtures; and (α2) 0.001 to 10 wt% of a crosslinking agent, resulting in an untreated dried absorbing polymer structure (Pu) having an outer region and an absorption under load (AUL) at a load of 0.3 psi (AUL 0.3 ), and an absorption under load at a load of 0.9 psi (AUL 0.9 ), and having a centrifuge retention capacity (CRC) of from 10 to 100 g/g; preparing a treated absorbing polymer structure (Pb) comprising the steps of treating the outer region of the untreated absorbing polymer structure (Pu) wherein the (AUL 0.3 ) is increased to at least 25 g/g, and the (AUL 0.9 ) is increased to at least 18 g/g; and further treating the outer surface of the treated absorbing polymer structure (Pb) to make the absorbing polymer composition (Pa) with a coating agent to reduce the (AUL 0.3 ) and the (AUL 0.9 ) values of the treated polymer structure (Pb).