Compositions comprising a dispersant and microcapsules containing an active material

• US 20030216488A1
• Filed: 04/02/2003
• Published: 11/20/2003
• Est. Priority Date: 04/18/2002
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Cetti, Jonathan Robert, Alonso, Mario, Uchiyama, Hirotaka, Cobb, Daniel Scott, Montezinos, David Lee
• Application Number:
  US10/405,678
• Publication Number:
  US 20030216488A1
• Time in Patent Office: Days
• US Class Current: 523/102
• CPC Class Codes: A01N 25/28 Microcapsules or nanocapsules
• CPC Class Codes: A61L 2/16 using chemical substances
• CPC Class Codes: A61L 2202/26 Textiles, e.g. towels, beds, cloths
• CPC Class Codes: A61L 2209/134 Distributing means, e.g. baffles, valves, manifolds, nozzles
• CPC Class Codes: A61L 2209/22 Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
• CPC Class Codes: A61L 9/01 Deodorant compositions compositions released by contact with a liquid A61L9/05
• CPC Class Codes: A61L 9/145 air-liquid contact processes, e.g. scrubbing
• CPC Class Codes: C11D 17/0013 Liquid compositions with insoluble particles in suspension C11D17/0021, C11D17/0026, C11D17/003 take precedence
• CPC Class Codes: C11D 17/0043 For use with aerosol devices
• CPC Class Codes: C11D 3/48 Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay
• CPC Class Codes: D06M 11/00 Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising D06M10/00 takes precedence
• CPC Class Codes: D06M 11/74 with carbon or graphite; with carbides; with graphitic acids or their salts
• CPC Class Codes: D06M 11/79 with silicon dioxide, silicic acids or their salts
• CPC Class Codes: D06M 13/005 Compositions containing perfumes; Compositions containing deodorants
• CPC Class Codes: D06M 13/127 Mono-aldehydes, e.g. formaldehyde; Monoketones
• CPC Class Codes: D06M 15/03 Polysaccharides or derivatives thereof
• CPC Class Codes: D06M 23/06 Processes in which the treating agent is dispersed in a gas, e.g. aerosols aerosol compositions C09K3/30
• CPC Class Codes: D06M 23/12 Processes in which the treating agent is incorporated in microcapsules making microcapsules B01J13/02
• CPC Class Codes: Y10T 428/2985 Solid-walled microcapsule from synthetic polymer

Abstract

Compositions for providing controlled-release of an active material comprise a dispersant and microcapsules containing the active material. The compositions contain the dispersant and/or microcapsules at relatively low levels to avoid negatively impacting the surfaces treated with the compositions. The active material is preferably a perfume and the composition provides a controlled-release scent, along with controlling malodor when the compositions further comprise optional odor control agent. Methods of providing a controlled-release of an active material on a surface comprise the step of contacting the surface with a composition comprising a dispersant and microcapsules containing an active material.

Claims

1. A non-aerosol composition for providing controlled-release of an active material, said composition comprising:

(a) from about 0.001% to about 1%, by weight of said composition, of microcapsules containing at least one of the following;

(i) an active material; and

(ii) an optional encapsulated odor control agent;

 

wherein said active material and said optional odor control agent may be contained in the same microcapsules;

in different microcapsules;

or both,

(b) a dispersant; and

(c) aqueous carrier.

2. The composition of claim 1 wherein said microcapsules comprise a material selected from the group consisting of urea-formaldehydes, melamineformaldehydes, phenolformaldehydes, gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), polyacrylates, polyamides, polyurethane, polymethacrylates, polyepoxides, cellulose acetate, cellulose nitrate, cellulose acetate butyrate, ethyl cellulose polyester, polychlorotrifluoroethylene, ethyl/vinyl acetate, saran, polystyrene, zein, paraffin wax, animal wax, vegetable wax, microcrystalline wax, polyethylene wax, and mixtures thereof.

3. The composition of claim 1 wherein said microcapsules comprise a material selected from the group consisting of poly(oxymethyleneurea), poly(oxymethylenemelamine), gelatin, polyurethane, poly(vinyl alcohol), and mixtures thereof.

4. The composition of claim 1 wherein said microcapsules are present in said composition at a level of from about 0.001% to about 0.9% by weight of the composition.

5. The composition of claim 4 wherein said microcapsules are present in said composition at a level of from about 0.001% to about 0.5% by weight of the composition.

6. The composition of claim 5 wherein said microcapsules are present in said composition at a level of from about 0.001% to about 0.2% by weight of the composition.

7. The composition of claim 1 wherein said active material is selected from the group consisting of perfumes, flavoring agents, fungicide, brighteners, antistatic agents, wrinkle control agents, fabric softener actives, hard surface cleaning actives, skin and/or hair conditioning agents, antimicrobial actives, UV protection agents, insect repellants, animal/vermin repellants, flame retardants, and mixtures thereof.

8. The composition of claim 7 wherein said active material is perfume.

9. The composition of claim 1 wherein said microcapsules contain said active material at a level of from about 1% to about 99% by weight of the total microcapsule.

10. The composition of claim 1 wherein said microcapsule has a particle size of from about 0.001 micron to about 1 millimeter.

11. The composition of claim 10 wherein said microcapsule has a particle size of from about 1 micron to about 500 microns.

12. The composition of claim 11 wherein said microcapsule has a particle size of from about 10 microns to about 100 microns.

13. The composition of claim 1 wherein said aqueous carrier comprises water and is present in said composition at a level of at least about 80% by weight of the composition.

14. The composition of claim 1 wherein said dispersant is selected from the group consisting of pectine, alginate, arabinogalactan, carageenan, gellan gum, xanthum gum, guar gum, acrylates/acrylic polymers, water-swellable clays, fumed silicas, acrylate/aminoacrylate copolymers, and mixtures thereof.

15. The composition of claim 14 wherein said dispersant is selected from the group consisting of acrylate/acrylic polymers, gellan gum, fumed silicas, acrylate/aminoacrylate copolymers, water-swellable clays, and mixtures thereof.

16. The composition of claim 15 wherein said dispersant is selected from the group consisting of acrylate/acrylic polymers, acrylate/aminoacrylate copolymer, gellan gum, and mixtures thereof.

17. The composition of claim 1 wherein said dispersant is present in said composition at a level of from about 0.001% to about 10% by weight of the composition.

18. The composition of claim 17 wherein said dispersant is present in said composition at a level of from about 0.001% to about 1% by weight of the composition.

19. The composition of claim 18 wherein said dispersant is present in said composition at a level of from about 0.001% to about 0.9% by weight of the composition.

20. The composition of claim 1 wherein said composition further comprises free perfume that is not contained in said microcapsule.

21. The composition of claim 1 wherein said composition further comprises solvent.

22. The composition of claim 21 wherein said solvent is present in said composition at a level of less than about 35% by weight of the composition.

23. The composition of claim 1 wherein said composition further comprises an effective amount of antimicrobial active to kill microorganisms on a surface treated with said composition, wherein said antimicrobial active is not contained in said microcapsule.

24. The composition of claim 1 wherein said composition further comprises an odor control agent.

25. The composition of claim 24 wherein said odor control agent is selected from the group consisting of uncomplexed cyclodextrin;

odor blockers;

reactive aldehydes;

flavanoids;

zeolites;

activated carbon; and

mixtures thereof.

30. A method of providing a controlled-release of an active material onto a surface, said method comprising the step of contacting said surface with a composition according to claim 1.

31. The method of claim 30 wherein said composition is packaged in a spray dispenser and said surface is contacted with said composition by spraying said composition from said spray dispenser onto said surface.

32. The method of claim 31 wherein said surface is fabric.

26. An aerosol composition for providing controlled-release of an active material, said composition comprising:

(a) microcapsules containing at least one of the following;

(i) an active material; and

(ii) an optional encapsulated odor control agent;

 

wherein said active material and said optional odor control agent may be contained in the same microcapsules;

in different microcapsules;

or both,

(b) from about 0.001% to about 1%, by weight of said composition, of a dispersant;

(c) aerosol propellant; and

(d) aqueous carrier.

33. A method of providing a controlled-release of an active material onto a surface, said method comprising the step of contacting said surface with a composition according to claim 26.

34. The method of claim 33 wherein said composition is packaged in a spray dispenser and said surface is contacted with said composition by spraying said composition from said spray dispenser onto said surface.

35. The method of claim 34 wherein said surface is fabric.

27. An antimicrobial composition for providing controlled-release of an active material and for killing microorganisms on a surface, said composition comprising:

(a) microcapsules containing at least one of the following;

(i) an active material; and

(ii) an optional encapsulated odor control agent;

 

wherein said active material and said optional odor control agent may be contained in the same microcapsules;

in different microcapsules;

or both,

(b) a dispersant;

(c) an effective amount of an antimicrobial active to kill microorganisms on said surface, wherein said antimicrobial active is not contained in said microcapsules; and

(d) aqueous carrier.

28. The composition of claim 27 wherein said antimicrobial active is selected from the group consisting of quaternary compounds, biguanide compounds, pyrithiones, dimethyldimethylol hydantoin, sodium sulfite, sodium bisulfite, imidazolidinyl urea, diazolidinyl urea, benzyl alcohol, 2-bromo-2-nitropropane-1,3-diol, formalin, iodopropenyl butylcarbamate, chloroacetamide, methanamine, methyldibromonitrile glutaronitrile, glutaraldehyde, 5-bromo-5-nitro-1,3-dioxane, phenethyl alcohol, o-Phenylphenol/sodium o-phenylphenol, sodium hydroxymethylglycinate, polymethoxy bicyclic oxazolidine, dimethoxane, thimersal, dichlorobenzyl alcohol, captan, chlorphenenesin, dichlorophene, chlorbutanol, glyceryl laurate, halogenated diphenyl ethers, 2,4,4′

-trichloro-2′

-hydroxy-diphenyl ether, 2,2′

-dihydroxy-5,5′

-dibromo-diphenyl ether, phenolic compounds, para-chloro-meta-xylenol, chlorothymol, phenoxyethanol, phenoxyisopropanol, 5-chloro-2-hydroxydiphenylmethane, resorcinol and its derivatives, 5-chloro 2,4-dihydroxydiphenyl methane, 4′

-chloro 2,4-dihydroxydiphenyl methane, 5-bromo 2,4-dihydroxydiphenyl methane, 4′

-bromo 2,4-dihydroxydiphenyl methane, bisphenolic compounds, parabens, halogenated carbanilides, and mixtures thereof.

29. The composition of claim 27 wherein said antimicrobial active is present in said composition at a level of from about 0.001% to about 20% by weight of the composition.

36. A method of providing a controlled-release of an active material onto a surface, said method comprising the step of contacting said surface with a composition according to claim 27.

37. The method of claim 36 wherein said composition is packaged in a spray dispenser and said surface is contacted with said composition by spraying said composition from said spray dispenser onto said surface.

38. The method of claim 37 wherein said surface is fabric.