# US 2013/0156838 A1 · Novel biocide composition

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- Number: US 2013/0156838 A1
- Document ID: US20130156838A1
- Status: Published application
- Kind: A1
- Application number: 13/818,176
- Filed: 2011-08-12
- Published: 2013-06-20
- Earliest claimed: 2010-08-31
- Assignees: Conopco, Inc.
- Inventors: Parthiv Ripudaman Dave; Girish Umakant Jambekar
- Web page: https://patentgrep.com/patent/US20130156838A1

## CPC

- A01N 59/14: Boron; Compounds thereof
- A01N 43/50: 1,3-Diazoles; Hydrogenated 1,3-diazoles
- A01N 59/00: Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- 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

The present invention relates to a novel biocide composition for use in gravity fed water purification devices and suitable for purifying water for drinking purposes and a process for preparing the novel biocide composition. The biocide tablet composition comprises one or more halogenated 5, 5-dialkylhydantoin compound; a chlorine biocide compound selected from trichloroisocyanuric acid (TCCA) or sodium dichloroisocyanurate (NaDCC) or mixtures thereof; 0.1-1.0% water soluble boron containing compound; wherein the ratio between the halogenated 5, 5-dialkylhydantoin compound and chlorine biocide compound is in the range 85:15 to 65:35 and the average particle size of the halogenated 5, 5-dialkylhydantoin compound and chlorine biocide compound is in the range 400 to1200 microns.

## Claims

### Claim 1

A biocide tablet composition comprising:
a) one or more halogenated 5,5-dialkylhydantoin compounds;
b) a chlorine biocide compound selected from trichloroisocyanuric acid (TCCA), sodium dichloroisocyanurate (NaDCC), and mixtures thereof;
c) 0.1-1.0% of a water soluble boron containing compound;
wherein the ratio between the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is in the range 85:15 to 65:35 and the average particle size of the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is in the range 400 to1200 microns.

### Claim 2 (depends on 1)

A biocide tablet composition as claimed in claim 1 wherein the 5,5-dialkylhydantoin compound is 1-bromo-3-chloro-5,5-dimethylhydantoin (BCDMH).

### Claim 3 (depends on 1)

A biocide tablet composition as claimed in claim 1 wherein chlorine biocide compound is trichloroisocyanuric acid (TCCA).

### Claim 4

A biocide tablet composition as claimed in wherein the water soluble boron containing compound is boric acid.

### Claim 5 (depends on 1)

A biocide tablet composition as claimed in claim 1 wherein ratio between the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is 70:30.

### Claim 6 (depends on 1)

A biocide tablet composition as claimed in claim 1 wherein the average particle size of the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is 800 to 1000 microns.

### Claim 7 (depends on 1)

A biocide tablet composition as claimed in claim 1 wherein the weight of the tablet is 2 g to 8 g.

### Claim 8

A process of preparing a biocide tablet comprising
a) one or more halogenated 5,5-dialkylhydantoin compounds,
b) a chlorine biocide compound selected from trichloroisocyanuric acid (TCCA), sodium dichloroisocyanurate (NaDCC), and mixtures thereof, and
c) 0.1 to 1.0% of a water soluble boron containing compound,
said process comprising:
i. mixing the halogenated 5,5-dialkylhydantoin compound and the chlorine biocide compound in a ratio 85:15 to 65:35 wherein the particle size of the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is in the range 400 to 1200 microns in the presence of the boron containing compound;
ii. compressing the mix mass using a force adjusted between 2 and 7 tonnes to produce the tablet of the desired strength.

### Claim 9 (depends on 9)

A process of preparing a biocide tablet as claimed in claim 9 wherein the temperature during the process is in the range from 15 to 30° C.

### Claim 10 (depends on 9)

A process of preparing a biocide tablet as claimed in claim 9 wherein the temperature during the process is in the range from 20 to 25° C.

### Claim 11 (depends on 8)

A process of preparing a biocide tablet as claimed in claim 8, wherein the one or more halogenated 5,5-dialkylhydantoin compounds are one or more 5,5-dimethylhydantoin compounds.

### Claim 12 (depends on 8)

A process of preparing a biocide tablet as claimed in claim 8, wherein the water soluble boron containing compound is a water soluble borate compound.

### Claim 13 (depends on 8)

A process of preparing a biocide tablet as claimed in claim 8 wherein the average particle size of the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is 800 to 1000 microns.

### Claim 14 (depends on 8)

A biocide tablet composition comprising:
a) one or more halogenated 5,5-dialkylhydantoin compounds;
b) a chlorine biocide compound selected from trichloroisocyanuric acid (TCCA), sodium dichloroisocyanurate (NaDCC), and mixtures thereof; and
c) 0.1-1.0% of a water soluble boron containing compound;
wherein the ratio between the halogenated 5,5-dialkylhydantoin compound and chlorine biocide compound is in the range 85:15 to 65:35 and the tablet is obtainable by the process according to claim 8.