Insoluble porous polymeric iodine complexes useful as bactericides

Claim 2

AN IODINE COMPLEX OF A WATER-INSOLUBLE BUT WATER-SWELLABLE CROSSLINKED POLYMER OF N-VINYLLACTAM OF N-LOWER ALKYL-NVINYLAMIDE MONOMER AND ABOUT 0.1 TO ABOUT 20% BY WEIGHT OF A CROSSLINKING AGENT CONTAINING AT LEAST TWO FUNCTIONAL GROUPS CAPABLE OF TAKING PART IN THE POLYMERIZATION REACTON, SAID CROSSLINKING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ALKYLENEBISACRYLAMIDES, ALKYLENE GLYCOL DIMETHACRYLATES, DIVINYLBENZENE, DIVINYL ETHYLBENZENE, DIVINYLCHLOROBENZENE, DIVINYLTOLUENE, DIVINYLNAPHTHALENE, ALLYL ARCYLATE, P-ISOPROPENYLSTYRENE, TRIVINYL TRIMESTATE, DIALLYLMALEATE, DIVINYL ETHER, 1,3-DIVINYL OXYBUTANE, 1,4-DIVINYL OXYBUTANE, TRIVINYL CITRATE, DIVINYL O-PHENYLENE DIACETATE, VINYL ALLYL ETHER, DIETHYLENE GLYCOL DIALLYL ETHER, TRIVINYL GLYCERYL ETHER, DIVINYL GLYCERYL ETHER, TETRAVINYL PENTAERYTHRITYL ETHER, HEXAHYDRO-1,3 ,5TRIACYL-S-TRIAZINE AND VINYLPYRROLIDONE DIMER, SID POLYMER BEING IN THE FORM OF POROUS BEADS OR GRANULES AND SAID COMPLEX CONTAINING FROM ABOUT 2 TO ABOUT 40% AVAILABLE IODINE.

Claim 3

The iodine complex of claim 1 wherein said complex contains from about 5 to about 30% available iodine.

Claim 4

The iodine complex of calim 1 wherein said N-vinyl lactam monomer is N-vinyl pyrrolidone.

Claim 5

The iodine complex of calim 1 wherein said N-vinyl lactam monomer is N-vinyl pyrrolidone.

Claim 6

The iodine complex of claim 1 wherein said polymer additionally contains a different polymerizable monomer in an amount of less than 50l % by weight based on the weight of the N-vinyllactam or N-alkyl-N-vinylamide monomer, which different polymerizable monomer is selected from the group consisting of N-vinyllactam, N-loweralkyl-N-vinylamide, acrylates, vinyl ethers, acrylamide, acrylic acid, aacrylonitrile, allyl acetate, allyl alcohol, crontonic acid, dimethylaminoethylvinyl sulfide, diethylhexylmaleate, didocecyl maleate, fumaramide, itaconic acid, methacrylic acid, methacrylamide, methoxystyrene, methylvinyl ketone, methylvinylpyrrolidone, 2-methyl-5-vinylpyridine, styrene, trichloroethylene, vinylcarbazole, vinylimidazole, vinyllaurate, vinylmethylbenzimidazole, vinylmethyldichlorosilane, vinylmethyloxazolidinone, vinyloxyethylurea, vinylpropionate, vinylpyridine, vinylsiloxane, vinylstearate, vinylacetate and tHe vinyl alcohol derivative thereof.

Claim 7

A method of producing a polymer-iodine complex according to claim 1 which comprises reacting at a temperature ranging from room temperature up to 100*C., under agitation, a crosslinked polymer of N-vinyllactam or N-lower alkyl-N-vinylamide monomer and about 0.1 to about 20% by weight of at least one crosslinking agent containing at least two functional groups capable of taking part in the polymerization reaction, selected from the group consisting of alkylenebisacrylamides, alkylene glycol dimethacrylates, divinylbenzene, divinyl ethyl benzene, divinyl chlorobenzene, divinyl toluene, divinyl naphthalene, allyl acrylate, p-iospropenylstyrene, trivinyl trimesate, diallyl maleate, divinyl ether, 1,3-divinyl oxybutane, 1,4-divinyl oxybutane, diethylene glycol, diallyether, trivinyl glyceryl ether, trivinyl citrate, divinyl o-phenylene diacetate, vinyl allyl ether, divinyl glyceryl ether, tetravinyl pentaerylthrityl ether, hexahydro-1,3,5-triacyl-s-triazine and vinylpyrrolidone dimer, said polymer being in the form of porous beads or granules with sufficient elemental iodine and for a time sufficient to produce a complex containing from about 2 to about 40% available iodine and recovering the complex thereby formed.

Claim 8

The method of claim 5 wherein said elemental iodine is blended and mixed with said polymer in a solid form.

Claim 9

The method of claim 6 wherein a solution of elemental iodine is mixed with said polymer.

Claim 10

The method of claim 7 wherein said solution of iodine comprises a solution of elemental iodine in a lower alcohol solvent.

Claim 11

The method of claim 8 wherein said solution of iodine additionally comprises an aqueous solution containing potassium iodide as solubilizing agent.