US2003216488A1PendingUtilityA1

Compositions comprising a dispersant and microcapsules containing an active material

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Assignee: PROCTER & GAMBLEPriority: Apr 18, 2002Filed: Apr 2, 2003Published: Nov 20, 2003
Est. expiryApr 18, 2022(expired)· nominal 20-yr term from priority
Inventors:Hirotaka UchiyamaJonathan Robert CettiMario AlonsoDavid Lee MontezinosDaniel Scott Cobb
A61L 2103/50C11D 3/48C11D 17/0043D06M 13/005D06M 23/06A61L 9/145C11D 17/0013D06M 15/03D06M 13/127C11D 3/505A61L 2/16A61L 9/01D06M 11/74D06M 23/12A01N 25/28A61L 2209/22A61L 2209/134Y10T428/2985D06M 11/79D06M 11/00
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Claims

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

exact text as granted — not AI-modified
What is claimed is:  
     
         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.  
     
     
         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.    
     
     
         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.  
     
     
         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.  
     
     
         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.  
     
     
         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.

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