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AssigneeLonza Ltd.
InventorsThomas Edward Farina, Kenneth Scott Geick, Julia Anne Falter
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The present invention is a method for producing solid halogenated hydantoin products using the process of melt extrusion. The form of the products which can be produced includes tablets, briquettes, pucks, dispensers, "designer" forms such as Christmas ornaments, pellets, and granules. The halogenated hydantoin compounds used in the forms contain methylethylhydantoin or an admixture of methylethylhydantoin and dimethylhydantoin. The halogenated hydantoin compositions used to make the forms can also include additives such as solubility modifiers, compaction aids, fillers, surfactants, dyes, fragrances, dispersants, lubricants, mold releases, detergent builders, corrosion inhibitors, chelants, stabilizers, biocides, bromide sources, or oxidizing halogen compositions. The present invention is also the product which is made via the melt extrusion method. The invention also is a method of obtaining an improved feedstock via melt extrusion and the improved feedstock product. This improved feedstock product can be used for making forms by compaction.
A method for the production of a solid halogenated hydantoin product containing from 5 to 20 mole % of methylethylhydantoin and from 80 to 95 mole % of dimethylhydantoin, comprising:
A solid halogenated hydantoin product containing at least 5 mole % of methylethylhydantoin and not more than 95 mole % of dimethylhydantoin made by:
A method for making a halogenated hydantoin feedstock for compaction containing at least 5 mole % of methylethylhydantoin and not more than 95 mole % of dimethylhydantoin, comprising extruding a dusty powder of said halogenated hydantoin under conditions sufficient to only partially melt said halogenated hydantoins for a residence time of not greater than 40 seconds to obtain an agglomerate.
Dependencies are inferred from the claim text.