# US 5,703,114 A · Use of 4,5-dicyano-1-3-dithiole-2-one (or thione) as antimicrobial and marine antifouling agents

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- Number: US 5,703,114 A
- Document ID: US5703114A
- Status: Granted
- Kind: A
- Application number: 08/676,661
- Filed: 1996-07-10
- Granted: 1997-12-30
- Earliest claimed: 1996-07-10
- Assignees: The Dow Chemical Company
- Inventors: Ravi B. Shankar; Duane R. Romer; R. Garth Pews
- Web page: https://patentgrep.com/patent/US5703114A

## CPC

- A01N 43/28: with two hetero atoms in positions 1,3
- 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

## Abstract

Disclosed is the use of compositions employing a 4,5-dicyano-1,3-dithiole-2-one (or thione) compound corresponding to the formula: ##STR1## wherein Z is oxygen or sulfur as the active antimicrobial and marine antifouling agent.

## Claims

### Claim 1

A paint composition useful in preventing the growth of marine organisms on a surface exposed to a marine environment in which marine organisms grow wherein said paint comprises an inert diluent and a vinyl resin binder, an epoxy binder or a polyurethane binder and a marine antifouling effective amount of a 4,5-dicyano-1,3-dithiole-2-one compound corresponding to the formula: ##STR5## wherein Z is oxygen or sulfur.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the compound is 4,5-dicyano-1,3-dithiole-2-thione.

### Claim 3

A method for preventing the growth of marine organisms on a surface exposed to a marine environment in which marine organisms grow comprising contacting said surface with a paint composition containing an inert diluent and a vinyl resin binder, an epoxy binder or a polyurethane binder and a marine antifouling effective amount of a 4,5-dicyano-1,3-dithiole-2-one or thione compound corresponding to the formula: ##STR6## wherein Z is oxygen or sulfur as the active material.

### Claim 4 (depends on 3)

The method of claim 3 wherein the compound is 4,5-dicyano-1,3-dithiole-2-thione.

### Claim 5 (depends on 3)

The method of claim 3 wherein the compound comprises from about 1 to about 30 weight percent of the composition.