| 摘要 |
Fines or other particles of water swellable polymeric material are converted into a gel mass by absorbing an aqueous solution of a cross linking agent into the fines, cross linking occurs between the cross linking agent and pendant groups in the polymer, and the mass is dried and comminuted. The polymer is preferably a cross linked sodium acrylate polymer and the cross linking agent is preferably a glycidyl ether or a silane cross linking agent. The product is novel and comprises a polymer structure that is formed of zones in which the polymer is substantially free of cross links between pendant groups, and the zones are interconnected by cross links through the pendant groups. |
