HALOGEN-CONTAINING SANITIZING COMPOSITION

• US 20100080857A1
• Filed: 09/30/2008
• Published: 04/01/2010
• Est. Priority Date: 09/30/2008
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Pickens, Stanley R.
• Granted Patent: US 7,923,036 B2
• Time in Patent Office: Days
• US Class Current: 424/665
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 59/00 Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
• CPC Class Codes: A01N 59/14 Boron; Compounds thereof
• CPC Class Codes: C02F 1/76 with halogens or compounds of halogens C02F1/4674 takes precedence
• CPC Class Codes: C02F 2103/023 Water in cooling circuits
• CPC Class Codes: C02F 2103/42 from bathing facilities, e.g. swimming pools
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

Compositions comprising a mixture of (a) a major amount of solid halogen-containing sanitizer material and (b) a minor amount of calcium oxide modified particulate boric acid, the amount of calcium oxide modified particulate boric acid being sufficient to enable the composition to be classified as a class 1 or class 2 NFPA oxidizer are described. Also described is particulate boric acid at least a portion of the particles thereof having on their surface at least a partial coating of calcium oxide, and a method for preparing such coated particulate boric acid.

Claims

1. A composition comprising a mixture of (a) a major amount of solid halogen-containing sanitizer material and (b) a minor amount of calcium oxide-modified particulate boric acid, the amount of said calcium oxide-modified boric acid in said composition being sufficient to enable the composition to be classified as a class 1 or class 2 NFPA oxidizer.

2. The composition of claim 1 wherein the solid halogen-containing sanitizer is chosen from lithium hypochlorite, alkaline earth metal hypochlorites, halogenated hydantoins, chlorinated isocyanuric acid, alkali metal derivatives of chlorinated isocyanuric acid, N-halo-2-oxazolidinones or N,N′

-dihalo-2-imidazolidinones.

3. The composition of claim 2 wherein the solid halogen-containing sanitizer is chosen from calcium hypochlorite, 1,3-dibromo-5,5-dimethylhydantoin, trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloro-s-triazinetrione or potassium dichloro-s-triazinetrione.

4. The composition of claim 3 wherein the calcium oxide-modified particulate boric acid is present in the composition in an amount of from 10 to 30 weight percent, based on the amount of solid halogen-containing sanitizer.

5. The composition of claim 4 wherein the calcium-oxide-modified particulate boric acid comprises 1 part of calcium oxide to from 1.5 to 8 parts of boric acid.

10. The composition of claim 1 wherein the calcium oxide modified particulate boric acid is prepared by blending calcium oxide and boric acid in a ratio of one part of calcium oxide to from 1.5 to 8 parts of boric acid, and heating the blend at temperatures of at least 90°

C. for from 0.5 to 20 hours.

6. A composition comprising a mixture of (a) from 70 to 90 weight percent calcium hypochlorite and (b) from 30 to 10 weight percent of calcium oxide-modified particulate boric acid, the amount of said calcium oxide modified particulate boric acid in said composition being sufficient to enable the composition to be classified as a class 1 or class 2 NFPA oxidizer.

7. The composition of claim 6 wherein the available chlorine content of the calcium hypochlorite is at least 45%.

8. The composition of claim 7 wherein the calcium oxide-modified particulate boric acid comprises 1 part of calcium oxide to from 1.5 to 8 parts of boric acid.

9. The composition of claim 8 wherein the calcium oxide-modified particulate boric acid is present in the composition in an amount of from 15 to 25 weight percent, based on the amount of calcium hypochlorite, and the calcium oxide-modified particulate boric acid comprises 1 part of calcium oxide to from 1.5 to 4 parts of boric acid.

11. The composition of claim 6 wherein the calcium oxide modified particulate boric acid is prepared by blending calcium oxide and boric acid in a ratio of one part of calcium oxide to from 1.5 to 4 parts of boric acid, and heating the blend at temperatures of from 90°

C. to 130°

C. for from 1 to 16 hours.

12. Particulate boric acid at least a portion of the particles thereof having on their surface at least a partial coating of calcium oxide.

13. The particulate boric acid of claim 12 comprising from 1.5 to 8 parts of boric acid to I part of calcium oxide.

14. The particulate boric acid of claim 12 comprising from 1.5 to 4 parts of boric acid to 1 part of calcium oxide.

15. A method for preparing particulate boric acid at least a portion of the particles thereof having on their surface at least a partial coating of calcium oxide comprising blending particulate boric acid and finely divided calcium oxide, and heating the resulting blend for a time and at a temperature sufficient to result in the particulate boric acid having at least a partial coating of calcium oxide adhering to its surface.

16. The method of claim 15 wherein the heating temperature ranges from 60°

C. to 140°

C., and the heating time ranges from 0.5 to 20 hours.

17. The method of claim 15 wherein the heating temperature ranges from 90°

C. to 130°

C., and the heating time ranges from 2 to 8 hours.

18. The method claim 16 wherein the resulting blend comprises 1 part of calcium oxide to from 1.5 to 8 parts of boric acid.