System for sustained release of phenolic material from porous granules of insoluble polymeric phenolic complexes
AssigneeGAF Corporation
InventorsMarvin M. Fein, Earl P. Williams, Nathan D. Field
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Abstract
A system for sustained release of phenolic material into a fluid from phenolic complexes of water-insoluble, but water-swellable crosslinked N-vinyllactam or N-alkyl-N-vinylamide polymers in the form of porous beads or granules. The complexes, which are particularly suited for use in situations wherein fluids containing phenolic materials in limited quantities are desired, and are provided by leaching a limited amount of phenolic material from the complex by contacting the porous granules in a container, such as in a canister or column which is used to treat liquids or water.
Claims10
A sustained phenolic releasing system which comprises a container containing porous granules or beads comprising a complexed compound of a phenolic material with a water-insoluble, but water swellable crosslinked polymer of a N-vinyllactam or an N-alkyl-N-vinylamide and provided with means permitting continuous flow of a fluid in which said phenolic material is soluble or readily dispersable into said container, contact with said granules or beads contained therein for a time sufficient for said fluid to leach a desired amount of the phenolic material from the porous granules and exit from said container.
A container containing porous granules or beads comprising a complex compound of a phenolic material with a water-insoluble, but water-swellable crosslinked polymer of an N-vinyl lactam or an N-alkyl-N-vinyl amide and provided with means permitting a fluid, in which said phenolic material is soluble or readily dispersible, to enter said container, contact said granules or beads contained therein and leave said container.
Dependencies are inferred from the claim text.