Solubilization of the zinc salt of 1-hydroxy-2-pyridinethione
AssigneeColgate-Palmolive Company
InventorPaul Sheldon Grand
Life of this patent
Estimating the term…
Abstract
This invention relates to improved methods of solubilizing heavy metal salts of 1-hydroxy-2(1H)- pyridinethione. More particularly, the invention relates to solubilizing heavy metal salts of 1-hydroxy-2(1H) pyridinethione with polyamines and to compositions containing the solubilized salts.
Claims9
A clear liquid composition for use as a bactericide or fungicide consisting essentially of 1/4 to 20% by weight of the zinc salt of 1-hydroxy-2-pyridinethione, an aliphatic polyamine having the general formula
- H.sub.2 N[CH.sub.2 CH.sub.2 NH].sub.n H
- wherein n represents a number from 1 to 5, the weight ratio of said amine to said pyridinethione salt being from about 1/2 to 1 to about 5 to 1, and the balance being a solvent selected from the group consisting of water, C.sub.2 -C.sub.3 monohydric alcohols, C.sub.2 -C.sub.3 polyhydric alcohols, dimethyl formamide, dimethylacetamide, dimethylsulfoxide and mixtures thereof.
A method of solubilizing the zinc salt of 1-hydroxy-2-pyridinethione for use as a bactericide or fungicide in a solvent selected from the group consisting of water, C.sub.2 -C.sub.3 monohydric alcohols, C.sub.2 -C.sub.3 polyhydric alcohols, dimethyl formamide, dimethylacetamide, dimethylsulfoxide and mixtures thereof which consists essentially of the step of solubilizing said pyridinethione salt in said solvent by admixing with an aliphatic polyamine having the general formula H.sub.2 N[CH.sub.2 CH.sub.2 NH].sub.n H wherein n represents a number from 1 to 5, said pyridinethione salt being 1/4 to 20% by weight of the resulting solution and the weight ratio of said aliphatic polyamine to said pyridinethione salt being from about 1/2 to 1 to about 5 to 1 and sufficient to improve the solubility of said pyridinethione salt.
Dependencies are inferred from the claim text.