Cyclodextrin stabilization of organic metal finishing additives in aqueous metal treating baths
AssigneeLeaRonal, Inc.
InventorJohn Houman
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Abstract
A method for stabilizing organic metal finishing additives in aqueous metal treating baths by dissolving the organic metal finishing additive with a cyclodextrin and a common solvent therefor, so that an inclusion compound of the organic metal finishing additive in the cyclodextrin is formed, and then dissolving the inclusion compound in an aqueous metal treating bath. Aqueous metal treating baths having dissolved therein inclusion compounds of organic metal finishing additives in cyclodextrins are also described.
Claims21
A method for stabilizing organic metal finishing additives in aqueous metal plating baths comprising the steps of:
- dissolving an organic metal finishing additive with a cyclodextrin in a common solvent therefor, so that an inclusion compound of said organic metal finishing additive in said cyclodextrin is formed, wherein said organic metal finishing additive is selected from the group consisting of water-insoluble organic metal finishing additives, hydrolytically unstable organic metal finishing additives, organic metal finishing additives that form insoluble metal precipitates and volatile organic metal finishing additives;
- and
- dissolving said inclusion compound in said aqueous metal plating bath.
An aqueous metal plating bath having dissolved therein an inclusion compound of an organic metal finishing additive in a cyclodextrin, wherein said organic metal finishing additive is selected from the group consisting of water-insoluble organic metal finishing additives, hydrolytically unstable organic metal finishing additives, organic metal finishing additives that form insoluble metal precipitates and volatile organic metal finishing additives.
Dependencies are inferred from the claim text.