Patent ID: 7759422

Claim:
Water-absorbing polymeric particles comprising a) at least one interpolymerized ethylenically unsaturated acid-functional monomer, the acid groups of the at least one acid-functional monomer bearing acid groups being more than 60 and not more than 70 mol % neutralized, b) at least one interpolymerized crosslinker, c) optionally one or more interpolymerized ethylenically and/or allylically unsaturated monomer copolymerizable with a), d) optionally one or more water-soluble polymer grafted wholly or partly with the monomers a), b) and if present c), and e) at least one converted postcrosslinker, wherein a Centrifuge Retention Capacity (CRC) is not less than 26 g/g, an Absorbency under Load (AUL0.7psi) is not less than 23 g/g, and a Transportation Value (TV) is not less than 15,000 cm 3 s, wherein the Transportation Value (TV) is the product of Saline Flow Conductivity (SFC) and wicking absorption after 60 minutes (DA 60 ) multiplied by 107, and wherein the wicking absorption after 60 minutes (DA 60 ) is a weight of 0.9% by weight sodium chloride solution absorbed by 70 g of the water-absorbing polymeric particles in 60 minutes, wherein the water-absorbing polymeric particles are situated, during measurement, in a circularly round vessel which has an internal diameter of 6 cm and is sealed at its lower end by a sieve base of 36 μm mesh size, and the sieve base is in atmospheric contact with 0.9% by weight sodium chloride solution.