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US 10,538,674 B2Granted
Method of forming anti-rust or anti-bacterial film containing tannic acid derivatives
AssigneeNational Institute for Materials Science
InventorsMasanobu Naito, Debabrata Payra
Life of this patent
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Abstract
A method of forming anti-rust or anti-bacterial film includes mixing a predetermined liquid and a film-forming composition which contains a tannic acid derivative in which hydrogen atoms in at least 10% of hydroxyl groups of tannic acid are substituted by a chain hydrocarbon group having 10 to 16 carbon atoms, and removing the liquid.
Claims15
A method of forming anti-rust or anti-bacterial film, comprising:
- mixing a predetermined liquid and a tannic acid derivative in which hydrogen atoms in at least 10% of hydroxyl groups of tannic acid are substituted by a chain hydrocarbon group having 6 to 16 carbon atoms;
- applying a mixture of the predetermined liquid and the tannic acid derivative on a substrate;
- and
- removing the predetermined liquid, thereby forming the anti-rust or the anti-bacterial film consisting essentially of the tannic acid derivative in which molecules of the tannic acid derivative line up with the chain hydrocarbon groups arranged side by side that contributes to stabilization of the film on the substrate,
- wherein the predetermined liquid is water or an organic solvent compatible with water.
2 more elements
A method of forming anti-rust or anti-bacterial film, comprising:
- reacting a tannic acid and an alkyl iodide having 6 to 16 carbon atoms, thereby forming a tannic acid derivative;
- mixing a predetermined liquid and the tannic acid derivative in which hydrogen atoms in at least 10% of hydroxyl groups of the tannic acid are substituted by an alkyl group having 6 to 16 carbon atoms;
- applying a mixture of the predetermined liquid and the tannic acid derivative on a substrate;
- and
- removing the predetermined liquid, thereby forming the anti-rust or the anti-bacterial film consisting essentially of the tannic acid derivative in which molecules of the tannic acid derivative line up with the chain hydrocarbon groups arranged side by side that contributes to stabilization of the film on the substrate,
- wherein the predetermined liquid is water or an organic solvent compatible with water.
3 more elements
Dependencies are inferred from the claim text.