Patent ID: 8304369

Claim:
A particulate superabsorbent polymer comprising a polymerized monomer selected from an ethylenically unsaturated carboxylic acid, ethylenically unsaturated carboxylic acid anhydride, salts or derivatives thereof, and an internal crosslinker agent comprising an internal crosslinking agent wherein the internal crosslinker agent comprises a silane compound comprising at least one vinyl group or allyl group and at least one Si—O bond wherein the vinyl group or allyl group is directly attached to a silicon atom, wherein the particulate superabsorbent polymer has a Centrifuge Retention Capacity (CRC) Increase of 2 g/g or more based on CRC Increase=CRC(rt,5 hr)−CRC(rt,0.5 hr) wherein CRC Increase measures the increase in the CRC that occurs and is calculated as the difference between the second CRC Test and the first CRC, and rt refers to room temperature.