Patent ID: 7728045

Claim:
A process for preparation of an absorbent polymer, comprising the steps of: i) polymerizing an aqueous monomer solution to obtain a polymer gel, ii) comminuting the polymer gel to obtain a polymer gel granulate, and iii) obtaining a mechanically loosened polymer gel granulate by loosening the polymer gel after the comminution in step ii), in the form of the polymer gel granulate obtained after the comminution; and iv) drying the polymer gel granulate; wherein the polymer gel granulate after step ii) has a spread including a first compressibility index κ 1 of the gel granulate that lies between about 10% and about 40%; and wherein the spread behavior of the gel granulate after step ii) is characterized by at least one of the following features (δ1) a second compressibility index κ 2 of the gel granulate lies between about 3·10 −5 Pa −1 and about 6·10 −5 Pa −1 ; or (δ2) a first decompressibility index κ 1 ′ of the gel granulate lies between about 3% and about 15%; or (δ3) a second compressibility index κ 2 ′ of the gel granulate lies between about 3·10 −5 Pa −1 and about 7·10 −5 Pa −1 .