IP Library › Patent Application 12380329
Patent Application
App. No. 12/380,329

Oxidizing composition including a gel layer

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Quick Facts
Patent No.
US None
App. No.
12/380,329
Abstract

A composition that generates and releases a biocidal solution comprising at least chlorine dioxide and hypobromous acid is presented. The composition comprises reactants capable of in-situ generation of chlorine dioxide and hypobromous acid, and a gelling agent that slows the rate of dissolution of the reactants, thereby increasing yield and providing a sustained release of biocidal solution. The chemical reaction is triggered when the reactants are contacted by a main solvent (e.g., water). Upon being exposed to the main solvent, the gelling agent forms a gelatinous structure that creates a chamber within the composition enclosing some of the reactants such that the in-situ generation takes place in the chamber. The gelatinous structure contributes to the high yield of the target product (e.g., chlorine dioxide) and its controlled release.

Claims (26)

1 . A slow dissolving tablet composition for the sustained release of an in-situ generated biocidal solution comprising at least chlorine dioxide and hypobromous acid, wherein the composition comprises:

a mixture of components comprising from 5-50 weight % of a chlorite donor, 2-30 weight % of a bromide donor, 40-90 weight % of a halogenated cyanuric acid, and from 0.1-10 weight % of gelling agent.

2 . The composition of claim 1 , wherein the halogenated cyanuric acid comprises at least one of: trichloroisocyanuric acid (TCCA), dichloroisocyanuric acid, bromochloroisocyanuric acid.

3 . The composition of claim 1 , wherein the chlorite donor comprises sodium chlorite.

4 . The composition of claim 1 , wherein the bromide donor comprises sodium bromide.

5 . The composition of claim 1 , wherein the gelling agent comprises polyvinyl alcohol.

6 . The composition of claim 5 , wherein the gelling agent comprising polyvinyl alcohol includes borax.

7 . The composition of claim 1 , wherein the gelling agent comprises polyacrylic acid.

8 . The composition of claim 1 , wherein the biocidal solution further comprises hypochlorous acid.

9 . A slow dissolving tablet composition for the sustained release of an in-situ generated biocidal solution comprising at least chlorine dioxide and hypobromous acid, wherein the composition comprises:

an in-situ generating portion capable of generating chlorine dioxide and hypobromous acid through a chemical reaction when contacted by a main solvent and comprising from 10-90 weight % of the total composition, the in-situ generating portion consisting of: an oxidant comprising from 40-90 weight %; a chlorite donor comprising 5-50 weight %; a bromide donor comprising from 2-30 weight %; and a gelling agent comprising from 0.1-10 weight %; and

a free halogen donor that surrounds the in-situ generating portion, and wherein the free halogen donor comprises from 10-90 weight % of the total composition.

10 . The composition of claim 9 , wherein the oxidant consist of potassium monopersulfate.

11 . The composition of claim 9 , wherein the oxidant consist of trichloroisocyanuric acid.

12 . The composition of claim 9 , wherein the oxidant consist of dichloroisocyanuric acid.

13 . The composition of claim 9 , wherein the chlorite donor comprises sodium chlorite.

14 . The composition of claim 9 , wherein the bromide donor comprises sodium bromide.

15 . The composition of claim 9 , wherein the free halogen donor comprises trichloroisocyanuric acid.

16 . The composition of claim 9 , wherein the free halogen donor comprises dibromodimethylhydantoin.

17 . The composition of claim 9 , wherein the free halogen donor comprises bromochlorodimethylhydantoin.

18 . The composition of claim 9 , wherein the free halogen donor encapsulates the in-situ generating portion of the composition.

19 . The composition of claim 9 , wherein the free halogen donor sandwiches the in-situ generating portion of the composition.

20 . The composition of claim 9 , wherein the free halogen donor comprises from 0.1-10 weight % gelling agent.

21 . A slow dissolving tablet composition for the sustained release of an in-situ generated biocidal solution comprising at least chlorine dioxide and hypobromous acid, wherein the composition comprises:

An aggregate of granules comprising from 5-50 weight % of a chlorite donor, 2-30 weight % of a bromide donor, 40-90 weight % of a halogenated cyanuric acid; and

a gelling agent comprising from 0.1-10 weight % of the total composition that coats the granules.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 30, 2010
From: MARTIN, ROY W.
To: TRUOX, INC.
Reel/Frame 025065/0671 →