| 摘要 |
The invention is a crosslinked carboxyl-containing hydrophilic resin crosslinked by a compound corresponding to formula (1): R<1>-(O(CH(R<3>)CH(R<3>)O)y-C(O)-R<2>)x wherein R<1> is independently in each occurrence a C2-10 straight- or branched-chain alkyl moiety; R<2> is independently in each occurrence a C2-10 straight- or branched-chain alkenyl moiety; R<3> is independently in each occurrence hydrogen or methyl; x is independently in each occurrence 2 or greater; where x is 2, y is independently in each occurrence 3 to 8; and where x is 3 or greater, y is independently in each occurrence 2 to 7. In another embodiment, the invention is a process for the preparation of crosslinked hydrophilic resins which comprises A) contacting one or more ethylenically unsaturated carboxylic acids, acid anhydrides, and optionally one or more comonomers with a crosslinking compound of formula (1) in an aqueous medium, optionally in the presence of a free radical or redox initiator catalyst system, under conditions such that a crosslinked hydrophilic resin is prepared. Optionally, the properties of the crosslinked hydrophilic resin are enhanced by heating the crosslinked hydrophilic resin under conditions such that the crosslinked hydrophilic resin exhibits a centrifuge capacity 25 (g/g) or greater, an absorption under load of 25 g/g or greater, and a ratio of absorption under load to centrifuge capacity of 0.6 or greater. |
