# US 5,688,981 A · Ethylenediaminetriacetic acid and N-acyl ethylenediaminetriacetic acid silver chelating agents and surfactants

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- Number: US 5,688,981 A
- Document ID: US5688981A
- Status: Granted
- Kind: A
- Application number: 08/749,364
- Filed: 1996-11-21
- Granted: 1997-11-18
- Earliest claimed: 1996-11-21
- Assignees: Hampshire Chemical Corp.
- Inventors: Arthur M. Nonomura
- Web page: https://patentgrep.com/patent/US5688981A

## CPC

- C11D 3/48: Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
- A01N 59/16: Heavy metals; Compounds thereof
- C07C 233/36: having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of an acyclic saturated carbon skeleton
- C11D 1/10: Amino carboxylic acids; Imino carboxylic acids; Fatty acid condensates thereof
- C11D 3/33: Amino carboxylic acids
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

Silver chelating agent and surfactant that exhibits photosensitivity and antimicrobial activity. The silver can be chelated with ethylenediaminetriacetic acid (ED3A) or salts thereof, or preferably with N-acyl ED3A or salts thereof. Antimicrobial activity is exhibited even at very low silver levels.

## Claims

### Claim 1

Silver chelating agent and surfactant of N-acyl ethylenediaminetriacetic acid or salts thereof, wherein said acyl group is a straight or branched aliphatic or aromatic group containing from 1 to 40 carbon atoms.

### Claim 2 (depends on 1)

The silver chelating agent and surfactant of N-acyl ethylenediaminetriacetic acid or salts according to claim 1, wherein said acyl group is a derivative of a carboxylic acid and contains 1 to 40 carbon atoms.

### Claim 3 (depends on 1)

The silver chelating agent and surfactant of N-acyl ethylenediaminetriacetic acid or salts according to claim 1, wherein said salts are alkali metal salts.

### Claim 4

Silver chelating agent and surfactant of lauroyl ethylenediaminetriacetic acid or salts thereof.

### Claim 5 (depends on 4)

The silver chelating agent and surfactant of claim 4, wherein said salt is the sodium salt.

### Claim 6 (depends on 4)

The silver chelacting agent and surfactant of claim 4, wherein said salt is the ammonium salt.

### Claim 7 (depends on 4)

The silver chelating agent and surfactant of claim 4, wherein said salt is the potassium salt.

### Claim 8

Silver chelating agent and surfactant of ethylenediaminetriacetic acid or salts thereof.

### Claim 9 (depends on 8)

The silver chelating agent and surfactant of ethylenediaminetriacetic acid or salts according to claim 8, wherein said salts are alkali metal salts.

### Claim 10 (depends on 9)

The silver chelating agent and surfactant of claim 9, wherein said salt is the sodium salt.

### Claim 11 (depends on 9)

The silver chelating agent and surfactant of claim 9, wherein said salt is the ammonium salt.

### Claim 12 (depends on 9)

The silver chelating agent and surfactant of claim 9, wherein said salt is the potassium salt.

### Claim 13

Silver chelating agent and surfactant of N-alkyl ethylenediaminetriacetic acid or salts thereof, wherein said alkyl group contains from 1 to 40 carbon atoms.