STABLE AQUEOUS SUSPENSION CONCENTRATE FOR DELIVERY OF UV-LABILE WATER-INSOLUBLE BIOCIDES

• US 20110081555A1
• Filed: 12/13/2010
• Published: 04/07/2011
• Est. Priority Date: 03/24/2006
• Status: Active Grant

• Current Assignee: Troy Technology Corporation Incorporated
• Original Assignee: ISP Investments, Inc. (Ashland Global Holdings, Inc.)
• Inventors: Winkowski, Karen, Gulka, Jean-Jacques, Narayanan, Kolazi S., Liu, Xianbin
• Granted Patent: US 9,044,010 B2
• Time in Patent Office: Days
• US Class Current: 428/537.1
• 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 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 25/22 containing ingredients stabilising the active ingredients
• CPC Class Codes: A01N 25/30 characterised by the surfactants
• CPC Class Codes: A01N 37/34 Nitriles
• CPC Class Codes: A01N 43/653 1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
• CPC Class Codes: A01N 43/80 five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
• CPC Class Codes: A01N 47/04 containing >N—S—C≡(Hal)3 groups
• CPC Class Codes: A01N 47/12 containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring
• CPC Class Codes: A01N 59/16 Heavy metals; Compounds thereof
• CPC Class Codes: A61K 31/325 Carbamic acids; Thiocarbamic acids; Anhydrides or salts thereof thiurams A61K31/145
• CPC Class Codes: A61K 31/425 Thiazoles
• CPC Class Codes: C09D 5/14 Paints containing biocides, e.g. fungicides, insecticides or pesticides C09D5/16 takes precedence
• CPC Class Codes: Y10T 428/31989 Of wood

Abstract

A stable, aqueous suspension concentrate which includes a solid polymeric dispersant comprising one or more anionic polymeric dispersing agents, optionally a co-dispersant which preferably is a homopolymer and/or a copolymer of a heterocyclic vinyl lactam, preferably in a wt. ratio of 0.1:1 to 1:0.1, a UV-labile, water-insoluble biocide active, and a UV-blocker or UV-absorber to stabilize said active upon storage and/or exposure to sunlight or UV radiation.

Claims

1. A stable, aqueous suspension concentrate which includes a solid polymeric dispersant comprising one or more anionic polymeric dispersing agents, a UV-labile, water-insoluble biocide active and a UV-blocker or UV-absorber to stabilize said active upon storage and/or exposure to sunlight or UV radiation.

2. A stable, aqueous suspension concentrate according to claim 1 wherein said solid polymeric dispersant further comprises a co-dispersant.

3. A stable, aqueous suspension concentrate according to claim 2 wherein said co-dispersant is a homopolymer and/or copolymer of a heterocyclic vinyl lactam.

4. A stable, aqueous suspension concentrate according to claim 2 wherein said anionic polymeric dispersing agent and said co-dispersant are present in a wt. ratio of 0.1:

1 to 1;

0.1.

5. A stable, aqueous suspension concentrate according to claim 1 wherein said anionic polymeric dispersing agent is selected from the group consisting of a sodium salt of alkyl vinyl ether/maleic acid half ester copolymer, a lignosulfonate or metal salt thereof, a sulfonated naphthalene/formaldehyde condensate, an alpha-olefin/maleic acid copolymer, a polyacrylate and mixtures thereof.

6. A stable, aqueous suspension concentrate according to claim 1 wherein said biocide is a fungicide.

7. A stable, aqueous suspension concentrate according to claim 6 wherein said biocide is a preservative.

8. A stable, aqueous suspension concentrate according to claim 6 wherein said fungicide is a halopropargyl compound, an isothiazolone, a triazole, a phthalimide, a benzimidazole carbamate or tetrachloroisophalonitrile.

9. A stable, aqueous suspension concentrate according to claim 1 wherein said biocide active is iodopropargyl butyl carbamate.

10. A stable aqueous suspension concentrate according to claim 7 wherein the said preservative is benzisothiazolone.

11. A stable, aqueous suspension concentrate according to claim 1 wherein said UV-blocker is titanium dioxide, zinc oxide, a stilbene, a UV-blocking mineral, and mixtures thereof.

12. A stable, aqueous suspension concentrate according to claim 2 wherein said co-dispersant comprises a homopolymer or copolymer of vinyl pyrrolidone and an ionic derivative of methyl vinyl ether-maleic acid half-ester.

13. A stable, aqueous suspension concentrate according to claim 2 wherein said co-dispersant is a clay selected from naturally occurring silicates, atta clay, bentonite, diatomaceous earth and Montmorillonite.

14. A stable, aqueous suspension concentrate according to claim 1 which exhibits essentially no degradation on storage at 50°

C. for 30 days, and substantially no discoloration or yellowing on exposure to sunlight or UV-radiation.

15. A composition including the concentrate of claim 1.

16. A paint composition including the concentrate of claim 1.

17. A personal care composition including the concentrate of claim 1.

18. An article comprising a substrate coated with the suspension concentrate of claim 1.

19. An article according to claim 18 wherein said substrate is wood.

20. A stable, water dispersible solid comprising a solid polymeric dispersant comprising one or more anionic polymeric dispersing agents, a UV-labile, water-insoluble biocide active and a UV-blocker or UV-absorber to stabilize said active upon storage and/or exposure to sunlight or UV radiation.