Porous cross-linked absorbent polymeric materials
AssigneeLever Brothers Company
InventorZia Haq
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Abstract
Porous, cross-linked polymeric materials comprising hydrocarbon residues can be sulphonated to produce sulphonated polymers which are able to absorb large volumes of ionic solutions and also act as ion-exchange resins.
Claims7
A sulphonated, porous, cross-linked polymeric material prepared from a process comprising polymerization of vinyl monomers in a water-in-oil high internal phase emulsion, at least about 90% by weight of the emulsion being water, the resultant polymeric structure having a pore volume in the range from 8 cc/g up to 99.5 cc/g, which polymer is then sulphonated, the sulphonated material having an absorbency for 10% aqueous chloride of at least 3 g/g of dry sulphonated material or salt thereof.
Dependencies are inferred from the claim text.