WO2007075821A2 - Odor elimination composition for use on soft surfaces - Google Patents

Odor elimination composition for use on soft surfaces Download PDF

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Publication number
WO2007075821A2
WO2007075821A2 PCT/US2006/048660 US2006048660W WO2007075821A2 WO 2007075821 A2 WO2007075821 A2 WO 2007075821A2 US 2006048660 W US2006048660 W US 2006048660W WO 2007075821 A2 WO2007075821 A2 WO 2007075821A2
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WO
WIPO (PCT)
Prior art keywords
composition
glycol
soft surface
active ingredient
surfactant
Prior art date
Application number
PCT/US2006/048660
Other languages
French (fr)
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WO2007075821A3 (en
Inventor
Peter N. Nguyen
Cary E. Manderfield
Maciej K. Tasz
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S. C. Johnson & Son, Inc.
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Publication date
Application filed by S. C. Johnson & Son, Inc. filed Critical S. C. Johnson & Son, Inc.
Priority to JP2008547511A priority Critical patent/JP2009520873A/en
Priority to EP06845912A priority patent/EP1969109B1/en
Priority to AU2006331715A priority patent/AU2006331715B2/en
Priority to CA002634422A priority patent/CA2634422A1/en
Publication of WO2007075821A2 publication Critical patent/WO2007075821A2/en
Publication of WO2007075821A3 publication Critical patent/WO2007075821A3/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
    • A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/835—Mixtures of non-ionic with cationic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0068—Deodorant compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2003—Alcohols; Phenols
    • C11D3/2041—Dihydric alcohols
    • C11D3/2044—Dihydric alcohols linear
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2068—Ethers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/30—Amines; Substituted amines ; Quaternized amines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/50—Perfumes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/005—Compositions containing perfumes; Compositions containing deodorants
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/38—Cationic compounds
    • C11D1/62—Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/74—Carboxylates or sulfonates esters of polyoxyalkylene glycols
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/12—Soft surfaces, e.g. textile

Definitions

  • An improved liquid formulation which effectively removes odors embedded in soft surfaces such as carpeting and upholstery.
  • the improved formulation makes use of Methylene glycol and a combination of nonionic and ionic surfactants, one of which has bactericidal properties.
  • TEG triethylene glycol
  • OUST ® air sanitizer products utilize a mixture that contains about 6wt% TEG.
  • a non-aerosol application of TEG for disinfecting air is enclosed in U.S. Patent No. 5,591,395, commonly assigned with the present application.
  • TEG has also been used as an air treatment for tobacco smoke. See U.S. Patent No.6,395,236.
  • Triethylene glycol has the following structure:
  • TEG is a colorless, odorless, non- volatile and hygroscopic liquid. It is characterized by two hydroxyl groups along with two ether linkages which contribute to its high water solubility, hygroscopicity and its ability to neutralize airborne odor-causing bacteria.
  • TEG can be prepared commercially by the oxidation of ethylene at high temperatures in the presence of a silver oxide catalyst, following by hydration of the ethylene oxide to yield mono-, di-, tri- and tetra-ethylene glycol products. TEG has a low toxicity.
  • Cyclodextrins have a toroidal structure, the interior of which is hydrophobic.
  • the exterior of this toroid structure is hydrophilic thereby rendering them water-soluble.
  • hydrophobic odor-causing compounds enter the hydrophobic interior of a cyclodextrin toroid and form a stable complex with the cyclodextrin structure due to the interplay of Van der Waals forces, the effects of hydrogen bonding and the common hydrophobicity of the cyclodextrin interior and odor-causing molecule.
  • cyclodextrins keep the molecules out of the air thereby reducing the odor caused thereby.
  • Water-soluble metallic salts may be combined with the cyclodextrins to absorb amines and sulfur-containing compounds.
  • a second approach utilizes water soluble/dispersible polymers as taught in U.S. Patent No. 6,454,876.
  • the water soluble/dispersible polymer of the '876 patent entraps the odor-causing molecule by forming a film that blankets the odor-causing molecule.
  • the film is formed as the solvent or carrier evaporates.
  • the residual polymer film provides a barrier to contain the odor-causing material in the soft surface thereby preventing it release to the ambient environment and detection by the consumer's sense of smell.
  • a method and a composition are disclosed for eliminating odors embedded in soft surfaces such as carpeting, upholstery, clothing, bed linens, etc.
  • a disclosed method for deodorizing soft surfaces comprises spraying a liquid formula on a soft surface, wherein the formula comprises an active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than 0.0035mmHg, and allowing the formula to absorb into the soft surface and make contact with an odor causing material disposed within the soft surface.
  • the active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than O.OO35mmHg at room temperature may be a glycol or another suitable material, one of which is triethanolamine (TEA).
  • TAA triethanolamine
  • the active ingredient is a glycol selected from the group consisting of Methylene glycol (TEG), dipropylene glycol, propylene glycol and combinations thereof. Triethanolamine is also an option for the active ingredient.
  • a disclosed method for deodorizing soft surfaces comprises spraying a liquid formula on a soft surface wherein the liquid formula comprises an active ingredient that may be a glycol selected from the group consisting of triethylene glycol (TEG), dipropylene glycol, and propylene glycol or another ingredient having a vapor pressure at room temperature of less than O.O035mmHg, and allowing the formula to absorb into the soft surface and make contact with an odor causing material disposed within the soft surface.
  • TAG triethylene glycol
  • dipropylene glycol dipropylene glycol
  • propylene glycol another ingredient having a vapor pressure at room temperature of less than O.O035mmHg
  • agglomerations of the glycol or other active ingredient, carrier, fragrance and surfactant form in the soft surface.
  • the odor-causing materials engage these agglomerations, the odor-causing materials are dissolved into the agglomeration thereby reducing the partial vapor pressure of the odor-causing material and the odor caused thereby.
  • the glycol or other active ingredient remains in a liquid form, no dried residue is apparent or visible.
  • the formula further comprises water and a low molecular weight alcohol such as a short chain monohydric alcohol.
  • the alcohol is selected from the group consisting of ethanol, isopropanol, butanol and propanol. Ethanol is currently preferred due to its low cost and acceptable odor.
  • Additional co-solvents include glycol ethers such as glycol monoethyl ether and diethylene glycol butyl ether.
  • the alcohol and water both act as solvents or carriers and the alcohol reduces the drying time of the disclosed liquid formulation.
  • the alcohol is a minor component compared to that of water, with the water content ranging from about 75-95 wt% and the alcohol content ranging from about 1 to about 10 wt%, most preferably about 6 wt%.
  • the formula further comprises a plurality of surfactants.
  • the surfactants may comprise a plurality of nonionic surfactants, a combination of nonionic and ionic surfactants, or, more specifically, a combination of nonionic and cationic surfactants. Amphoteric and zwitterionic surfactants may also be used.
  • the plurality of surfactants includes at least one ionic surfactant and at least one nonionic surfactant.
  • the surfactants used in the formula may also be known in others applications as emulsifiers and, for the purposes of this disclosure, the terms surfactant and emulsifier will be considered to be interchangeable as the common property of surfactants and emulsifiers, i.e., reducing surface tension, is the important function for purposes of this application.
  • Combinations of nonionic surfactants have been found to be effective as well as combinations of nonionic and cationic surfactants.
  • the nonionic surfactant comprises a combination of an ether and a hydrogenated oil.
  • the nonionic surfactants comprise a combination of polyglycol ether and a hydrogenated castor oil.
  • polyglycol ether is a polyoxyethylene alkylether.
  • the ionic surfactant is a cationic surfactant.
  • the cationic surfactant is a quaternary ammonium salt. A benefit of using a quaternary ammonium salt is the anti-bacterial properties of these salts.
  • One disclosed formulation for carrying out the above-described method comprises: water; a short chain monohydric alcohol; a glycol selected from the group consisting of triethylene glycol (TEG), dipropylene glycol, propylene glycol, and combinations thereof or another material that is a liquid at room temperature and that has a vapor pressure at room temperature of less than 0.0035mmHg at room temperature; fragrance; at least one nonionic surfactant, and at least one ionic surfactant.
  • TEG triethylene glycol
  • dipropylene glycol and propylene glycol may be substituted for the currently preferred glycol, TEG.
  • combinations of these glycols may be used.
  • the glycol may be present in an amount ranging from 0.5 to about 5 wt%. Most preferably, the glycol, which is preferably but not necessarily TEG, comprises about 1 wt% of the formulation.
  • the applied formulation comprises from about 1 to -about 10 wt% low molecular weight monohydric alcohol or glycol ether, from about 0.5 to about 5wt% glycol, from about 0.25 to about 0.75 wt% fragrance, from about 1 to about 2 wt% nonionic and ionic surfactants and, the remainder, water.
  • the surfactant content can range from about 0.5 to about 2wt%.
  • the surfactant combination comprises hydrogenated castor oil, a polyglycol ether, and a quaternary ammonium salt.
  • the formulation comprises from about 4 to about 8 wt% ethanol, from about 0.5 to about 1.5 wt% TEG, from about 0.5 to about 0.75 wt% fragrance, from about 0.5 to about 1.5 wt% nonionic surfactant, from about 0.1 to about 1 wt% cationic surfactant and, the remainder, water.
  • the nonionic surfactants comprise a combination of a hydrogenated oil and a polyglycol ether.
  • the ionic surfactant comprises a quaternary ammonium salt.
  • the nonionic surfactants may include (1) a hydrogenated castor oil, that includes glycerol and polyethylene glycol oxystearate, and (2) a polyglycol ether that is a ethoxylation product of Cn to Qs linear secondary alkanols with ethylene oxide.
  • An improved odor reducing liquid for carpeting, upholstery and other soft surfaces is provided.
  • the improved formulation delivers an active ingredient to odor- causing compounds or molecules embedded within soft surfaces thereby enabling active ingredient to come into contact with the odor-causing compounds and molecules.
  • the active ingredient in combination with other materials of the formulation, form agglomerations within the soft surface.
  • the odor-causing material engages these agglomerations, the odor-causing material is dissolved into the agglomeration thereby reducing the partial vapor pressure of the odor-causing material to a level below what is needed to be detected by the human sense of smell.
  • the glycol or other active ingredient remains in a liquid form, the agglomerations remain as liquid agglomerations for an extended period of time and no dried residue is apparent or visible.
  • the malodor molecules adsorbed onto the soft surface are first dissolved in the liquid aqueous formulation before formation of the agglomerations.
  • the malodor molecules desorb from the soft surface, some of the molecules enter the gas phase rather than the applied aqueous phase.
  • the degree to which a molecule will desorb from the soft surface preferentially into the gas phase will depend of the degree of solubility of the molecule in the aqueous phase. Molecules with good water solubility will transferred to the applied aqueous phase. Molecules with poor water solubility will desorb from the surface into the air.
  • the formulations disclosed herein encourage this action for such malodorants.
  • the disclosed formulations which include a mixed solvent system, e.g. water/alcohol/glycol, can enhance the solubility of the malodor molecule in the applied product.
  • the disclosed formulations offer a dual action odor elimination mechanism: desoiption of malodor from the surface as well as increased solubility of malodor molecules in the applied product. Odors that are desorbed from the surface into the surrounding air can be removed from the home by other means such as natural air change, i.e. ventilation.
  • Molecules solubilized by the mixed solvent system will ultimately remain in the low volatile liquids, e.g. glycol or TEA and desorb from the residual film at a much slower rate.
  • the degree to which malodor molecules will be taken up in the mixed solvent systems can be controlled by adjusting the solubility parameters of the mixed solvent system to more closely match the solubility parameters of the malodor molecules.
  • Certain odorous compounds such as thiols, amines, acids and sulfides will readily dissolve into the agglomerations which, by way of an example, can comprise a core of the active ingredient (i.e., the glycol or other liquid with a vapor pressure at room temperature of less than O.OO35mmHg), carrier, fragrance and an outer portion that includes significant amounts of surfactant.
  • the disclosed formulations do not mask odor-causing compounds and molecules; they keep them from being detected by reducing their vapor pressures.
  • fragrance oil mixture TAKASAGO RK- fragrance 1428, outdoor
  • PROTACHEMTM CAH-60 hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • PROTACHEMTM CAH-60 hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • PROTACHEMTM CAH-60 hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • fragrance oil mixture (TAKASAGO RK- Fragrance 1428, outdoor) 0.50 PROTACHEMTM CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • PROTACHEMTM CAH-60 hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • PROTACHEMTM CAH-60 hydrogenated nonio ⁇ ic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • fragrance oil mixture (TAKASAGO RK- Fragrance 1428, outdoor) 0.50 PROTACHEMTM CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • PROTACHEMTM CAH-60 hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
  • Water and ethanol serve as carriers and co-solvents.
  • ethanol or an other short chain monohydric alcohol, provides for a faster dry time for the applied composition.
  • Ethanol is also an excellent carrier and therefore assists in delivering the active ingredient to where it is needed.
  • Additional co-solvents include glycol ethers such as glycol monoethyl ether and diethylene glycol butyl ether.
  • glycol ethers such as glycol monoethyl ether and diethylene glycol butyl ether.
  • the alcohol or glycol ether co-solvent should be present in the range of from about 1 to about 10wt%.
  • the amount of TEG may be relatively low as compared at an aerosol air sanitizing formulation.
  • an air sanitizing formulation will have about 6wt% TEG; in this particular application, i.e., soft surfaces, the amount of TEG can be reduced to less than 5wt%.
  • the TEG comprises 1.0wt% of the formulations.
  • the TEG content can vary widely and could range from 0.5wt% to 6.0wt% or more. Examples 1-4 and 7-8 above, with their 1.0wt% TEG content, are merely currently preferred embodiments.
  • TEG is not the only glycol that can be used.
  • Dipropylene glycol (Example 6) and propylene glycol are also suitable.
  • an active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than O.OO35mmHg may be utilized.
  • TEG triethanolamine
  • TEA triethanolamine
  • the fragrances utilized can be obtained from Takashago International Corp., a Japanese corporation having an office at 4 Volvo Drive, Rockleigh, New Jersey 07647 (http://www.takashago.com ' ). Of course, one skilled in the art will know that other suppliers of fragrances exist and this disclosure is not limited to the particular fragrances utilized herein.
  • a preferred fragrance range is from about 0.25 to about 0.75wt%.
  • Examples 1 and 2 utilize only nonionic surfactants in the form of hydrogenated castor oils and polyglycol ethers.
  • the hydrogenated castor oils are sold under the tradename PROTACHEMTM CAH-60 and the JNCI7CTFA chemical name "PEG-60 hydrogenated castor oil.” These materials can be obtained from Protameen Chemicals, Inc., 375 Minnisik Road, Totowa, New Jersey 07511.
  • the hydrogenated castor oil includes glycerol stearate, and if ethoxylated, includes polyethyelene glycol oxystearate.
  • the other nonionic surfactant or emulsifier utilized is either TERGJTOLTM 15-S-7, which is a polyglycol ether. It is available from Sigma- Aldrich, P.O. Box 14508, St. Louis, Missouri 63718 as well as the Dow Chemical Co., 2030 Dow Center, Midland, Michigan 48674. Other sources of TERGJTOLTM will be apparent to those skilled in the art.
  • Another option for a nonionic surfactant is SOFTANOLTM 70, available from Nippon Shokubai of Osaka 541-0043, Japan.
  • SOFTANOLTM 70 available from Nippon Shokubai of Osaka 541-0043, Japan.
  • Other branched or linear, primary or secondary, polyethoxylated alcohols can be used as nonionic surfactants.
  • Examples 1 and 2 include only nonionic surfactants. While these examples provide an excellent mechanism for delivering the active ingredient (e.g., TEG) and fragrance to odor-causing molecules residing in soft surfaces, it has been surprisingly found that the combination of nonionic and ionic surfactants provides still improved utility. Thus, small amounts of a quaternary ammonium salt in the form of Agent 2248-14 are added in Examples 3 through 8. The combination of the quaternary ammonium salt with the nonionic surfactants provides improved penetrability and delivery of TEG to the problematic areas within carpeting, upholstery, bedding, drapes, etc.
  • the disclosed formulations and methods provide a means for delivering TEG to odor-causing molecules buried deep within upholstery or carpeting.
  • the TEG can be effectively delivered to deeply embedded odor-causing materials such as pet urine or other problematic odors.
  • Agent 2248-14 and other quaternary ammonium salts have anti-microbial properties and therefore add a sanitization function to the disclosed formulations.
  • the total surfactant content preferably ranges from about 0.50 to about 2wt%.
  • the preferred quaternary ammonium salt (Agent 2248-14) is a mixture of alkyl dimethyl benzyl ammonium chloride and alkyl dimethyl ethyl benzyl ammonium chloride. It is sold by the Stepan Company, 22 Frontage Road, Northfield, IL 60093 (www.stepan.com) in a preparation that is 25wt% alkyl dimethyl benzyl ammonium chloride, 25wt% alkyl dimethyl ethyl benzyl ammonium chloride, 2-3wt% ethanol and the remainder water.
  • ionic surfactants are available and quaternary ammonium salts are not the only possibility. While cationic surfactants are utilized in the form of quaternary ammonium salts, other cationic surfactants will be apparent to those skilled in the art without undue experimentation.
  • Aerosol formulations are provided in Examples 7 and 8, using nitrogen propellant and hydrocarbon propellant respectively.
  • the disclosed method and compositions provide a new application for TEG, other glycols and other materials that are liquids at room temperature and that have a vapor pressure of less than O.0035mmHg at room temperature, as a malodor absorbent for soft surfaces.
  • TEG has been extended to treating odors embedded in soft surfaces such as carpeting and upholstery.
  • a layer or an agglomeration is formed within the soft surface substrate in close proximity to the malodor sources.
  • the odor- causing molecules come into contact with the agglomeration and dissolve in the agglomeration thereby reducing their effective vapor pressure.
  • malodorous components thiols, amines, acids, sulfites, etc.
  • the malodorous components have a greater affinity for TEG than air thus reducing the vapor pressure and perception by the human sense of smell.
  • the agglomerations or droplets formed by the active ingredient (TEG, dipropylene glycol, propylene glycol, or material with a vapor pressure of less than 0.0035mmHg at room temperature), carrier, fragrance and surfactants have an inner portion or core where the active ingredient, fragrance, and some carrier accumulate and an outer surface or outer portion where the surfactant has accumulated. Odor- causing materials are absorbed through the outer (surfactant) layer into the core of the agglomeration resulting in a reduction of the vapor pressure and therefore odor reduction.
  • active ingredient TOG, dipropylene glycol, propylene glycol, or material with a vapor pressure of less than 0.0035mmHg at room temperature
  • carrier fragrance and surfactants
  • Odor- causing materials are absorbed through the outer (surfactant) layer into the core of the agglomeration resulting in a reduction of the vapor pressure and therefore odor reduction.
  • micro emulsions of fragrance, TEG, ethanol and water When applied, the micro emulsion penetrates into the spaces between fibers of a soft surface. Upon evaporation, most of the volatile components (water and ethanol) are removed and a residual agglomeration or droplet of TEG, ethanol, water, fragrance and surfactant serves as an absorbent for odor-causing compounds and molecules. The agglomerations also serve as fragrance extenders.

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Abstract

A method and composition for deodorizing soft surfaces such as carpeting and upholstery are disclosed. The method includes the spraying of a liquid composition on a soft surface and allowing the composition to absorb into the soft surface, form liquid agglomerations within the soft surface to the agglomerations can make contact with malodorants disposed within the soft surface. The composition comprises an active ingredient that is a liquid at room temperature with a vapor pressure of less than 0.0035mmHg at room temperature. For example, the active ingredient can be triethylene glycol. Other ingredients that contribute to agglomeration formation include ethanol, water, fragrance and a combination of at least one nonionic and at least one ionic surfactant.

Description

ODOR ELIMINATION COMPOSITION FOR USE ON SOFT SURFACES
BACKGROUND
Technical Field
[0001] An improved liquid formulation is disclosed which effectively removes odors embedded in soft surfaces such as carpeting and upholstery. The improved formulation makes use of Methylene glycol and a combination of nonionic and ionic surfactants, one of which has bactericidal properties.
Description of the Related Art
[0002] It has been known to use certain glycols in aerosols or vapor forms to sanitize air in a room by killing airborne bacteria. One particular glycol, triethylene glycol ("TEG"), has been found particularly effective for sanitizing air when delivered via an aerosol spray. The commercially successful OUST® air sanitizer products utilize a mixture that contains about 6wt% TEG. A non-aerosol application of TEG for disinfecting air is enclosed in U.S. Patent No. 5,591,395, commonly assigned with the present application. TEG has also been used as an air treatment for tobacco smoke. See U.S. Patent No.6,395,236.
[0003] Triethylene glycol has the following structure:
HOT ^^^ V\^^ \o^ ^^yS triethylene glycol
TEG is a colorless, odorless, non- volatile and hygroscopic liquid. It is characterized by two hydroxyl groups along with two ether linkages which contribute to its high water solubility, hygroscopicity and its ability to neutralize airborne odor-causing bacteria. TEG can be prepared commercially by the oxidation of ethylene at high temperatures in the presence of a silver oxide catalyst, following by hydration of the ethylene oxide to yield mono-, di-, tri- and tetra-ethylene glycol products. TEG has a low toxicity.
[0004] Until now, the treatment and removal of odor-causing substances from soft surfaces such as clothing, drapes, bedding, carpeting and upholstery utilize very different mechanisms. One strategy uses water-soluble cyclodextrins for odor control as discussed extensively in U.S. Patent Nos. 5,760,475, 6,077,318, 6,248,135 and 6,451,065. These patents all teach the use of water-soluble cyclodextrins in combination with water-soluble metallic salts.
[0005] Cyclodextrins have a toroidal structure, the interior of which is hydrophobic. The exterior of this toroid structure is hydrophilic thereby rendering them water-soluble. It has been found that hydrophobic odor-causing compounds enter the hydrophobic interior of a cyclodextrin toroid and form a stable complex with the cyclodextrin structure due to the interplay of Van der Waals forces, the effects of hydrogen bonding and the common hydrophobicity of the cyclodextrin interior and odor-causing molecule. By forming stable complexes with odor-causing molecules, cyclodextrins keep the molecules out of the air thereby reducing the odor caused thereby. Water-soluble metallic salts may be combined with the cyclodextrins to absorb amines and sulfur-containing compounds.
[0006] A second approach utilizes water soluble/dispersible polymers as taught in U.S. Patent No. 6,454,876. In contrast to cyclodextrins, which entrap or cage the odor-causing molecule within the cyclodextrin toroid as discussed above, the water soluble/dispersible polymer of the '876 patent entraps the odor-causing molecule by forming a film that blankets the odor-causing molecule. The film is formed as the solvent or carrier evaporates. Thus, the residual polymer film provides a barrier to contain the odor-causing material in the soft surface thereby preventing it release to the ambient environment and detection by the consumer's sense of smell.
[0007] Both the cyclodextrin and film-forming polymer products leave a residue after the solvent or carrier evaporates. Further* neither cyclodextrins nor film-forming polymers have any anti-microbial properties.
[0008] Other more drastic measures at treating odor-causing molecules trapped in carpeting, upholstery and clothing involve the use of enzymes or detergents toyremove the odor-causing molecules. In the case of upholstery and carpeting, professional services or the renting of special machinery is often required.
[0009] Therefore, there is a need for an improved means for removing odors in soft surfaces that are not easily washable, i.e., carpeting and upholstery. What is needed is an improved liquid application that may be sprayed onto carpeting or upholstery, that will not discolor or form a film or residue on the carpeting or upholstery, and that will effectively deliver active odor-neutralizing ingredients to odor-causing molecules trapped in the carpeting or upholstery.
SUMMARY OF THE DISCLOSURE
[0010] In satisfaction of the afore noted needs, a method and a composition are disclosed for eliminating odors embedded in soft surfaces such as carpeting, upholstery, clothing, bed linens, etc.
[0011] In an embodiment, a disclosed method for deodorizing soft surfaces comprises spraying a liquid formula on a soft surface, wherein the formula comprises an active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than 0.0035mmHg, and allowing the formula to absorb into the soft surface and make contact with an odor causing material disposed within the soft surface.
[0012] The active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than O.OO35mmHg at room temperature may be a glycol or another suitable material, one of which is triethanolamine (TEA). Other materials for use at the active ingredient will be apparent to those skilled in the art upon reading this disclosure.
[0013] In a refinement, the active ingredient is a glycol selected from the group consisting of Methylene glycol (TEG), dipropylene glycol, propylene glycol and combinations thereof. Triethanolamine is also an option for the active ingredient.
[0014] In an embodiment, a disclosed method for deodorizing soft surfaces comprises spraying a liquid formula on a soft surface wherein the liquid formula comprises an active ingredient that may be a glycol selected from the group consisting of triethylene glycol (TEG), dipropylene glycol, and propylene glycol or another ingredient having a vapor pressure at room temperature of less than O.O035mmHg, and allowing the formula to absorb into the soft surface and make contact with an odor causing material disposed within the soft surface.
[0015] In such a method, agglomerations of the glycol or other active ingredient, carrier, fragrance and surfactant form in the soft surface. When odor-causing materials engage these agglomerations, the odor-causing materials are dissolved into the agglomeration thereby reducing the partial vapor pressure of the odor-causing material and the odor caused thereby. As the glycol or other active ingredient remains in a liquid form, no dried residue is apparent or visible.
[0016] In a refinement, the formula further comprises water and a low molecular weight alcohol such as a short chain monohydric alcohol. In a further refinement of this concept, the alcohol is selected from the group consisting of ethanol, isopropanol, butanol and propanol. Ethanol is currently preferred due to its low cost and acceptable odor. Additional co-solvents include glycol ethers such as glycol monoethyl ether and diethylene glycol butyl ether.
[0017] The alcohol and water both act as solvents or carriers and the alcohol reduces the drying time of the disclosed liquid formulation. Preferably, the alcohol is a minor component compared to that of water, with the water content ranging from about 75-95 wt% and the alcohol content ranging from about 1 to about 10 wt%, most preferably about 6 wt%.
[0018] In another refinement, the formula further comprises a plurality of surfactants. The surfactants may comprise a plurality of nonionic surfactants, a combination of nonionic and ionic surfactants, or, more specifically, a combination of nonionic and cationic surfactants. Amphoteric and zwitterionic surfactants may also be used.
[0019] In a further refinement of this concept, the plurality of surfactants includes at least one ionic surfactant and at least one nonionic surfactant. The surfactants used in the formula may also be known in others applications as emulsifiers and, for the purposes of this disclosure, the terms surfactant and emulsifier will be considered to be interchangeable as the common property of surfactants and emulsifiers, i.e., reducing surface tension, is the important function for purposes of this application. Combinations of nonionic surfactants have been found to be effective as well as combinations of nonionic and cationic surfactants.
[0020] In a refinement, the nonionic surfactant comprises a combination of an ether and a hydrogenated oil. In a further refinement, the nonionic surfactants comprise a combination of polyglycol ether and a hydrogenated castor oil. In still a further refinement, polyglycol ether is a polyoxyethylene alkylether. [0021] In another refinement, the ionic surfactant is a cationic surfactant. Preferably, the cationic surfactant is a quaternary ammonium salt. A benefit of using a quaternary ammonium salt is the anti-bacterial properties of these salts.
[0022] One disclosed formulation for carrying out the above-described method comprises: water; a short chain monohydric alcohol; a glycol selected from the group consisting of triethylene glycol (TEG), dipropylene glycol, propylene glycol, and combinations thereof or another material that is a liquid at room temperature and that has a vapor pressure at room temperature of less than 0.0035mmHg at room temperature; fragrance; at least one nonionic surfactant, and at least one ionic surfactant. As noted above, dipropylene glycol and propylene glycol may be substituted for the currently preferred glycol, TEG. Also, as indicated, combinations of these glycols may be used.
[0023] In a refinement, the glycol may be present in an amount ranging from 0.5 to about 5 wt%. Most preferably, the glycol, which is preferably but not necessarily TEG, comprises about 1 wt% of the formulation.
[0024] In another refinement, the applied formulation comprises from about 1 to -about 10 wt% low molecular weight monohydric alcohol or glycol ether, from about 0.5 to about 5wt% glycol, from about 0.25 to about 0.75 wt% fragrance, from about 1 to about 2 wt% nonionic and ionic surfactants and, the remainder, water. The surfactant content can range from about 0.5 to about 2wt%.
[0025] In a preferred embodiment, the surfactant combination comprises hydrogenated castor oil, a polyglycol ether, and a quaternary ammonium salt.
[0026] Li one preferred embodiment, the formulation comprises from about 4 to about 8 wt% ethanol, from about 0.5 to about 1.5 wt% TEG, from about 0.5 to about 0.75 wt% fragrance, from about 0.5 to about 1.5 wt% nonionic surfactant, from about 0.1 to about 1 wt% cationic surfactant and, the remainder, water.
[0027] In a further refinement of this concept, the nonionic surfactants comprise a combination of a hydrogenated oil and a polyglycol ether. In a further refinement, the ionic surfactant comprises a quaternary ammonium salt. In still a further refinement, the nonionic surfactants may include (1) a hydrogenated castor oil, that includes glycerol and polyethylene glycol oxystearate, and (2) a polyglycol ether that is a ethoxylation product of Cn to Qs linear secondary alkanols with ethylene oxide.
[0028] Other advantages and features of the disclosed methods and compositions will be described in greater detail below.
DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS
[0029] An improved odor reducing liquid for carpeting, upholstery and other soft surfaces is provided. The improved formulation delivers an active ingredient to odor- causing compounds or molecules embedded within soft surfaces thereby enabling active ingredient to come into contact with the odor-causing compounds and molecules. Without being bound to any particular theory, it is believed that the active ingredient, in combination with other materials of the formulation, form agglomerations within the soft surface. When an odor-causing material or molecule engages these agglomerations, the odor-causing material is dissolved into the agglomeration thereby reducing the partial vapor pressure of the odor-causing material to a level below what is needed to be detected by the human sense of smell. As the glycol or other active ingredient remains in a liquid form, the agglomerations remain as liquid agglomerations for an extended period of time and no dried residue is apparent or visible.
[0030] Also, when the disclosed formulations are applied to a soft surface, the malodor molecules adsorbed onto the soft surface are first dissolved in the liquid aqueous formulation before formation of the agglomerations. As the malodor molecules desorb from the soft surface, some of the molecules enter the gas phase rather than the applied aqueous phase. The degree to which a molecule will desorb from the soft surface preferentially into the gas phase will depend of the degree of solubility of the molecule in the aqueous phase. Molecules with good water solubility will transferred to the applied aqueous phase. Molecules with poor water solubility will desorb from the surface into the air.
[0031] Since the agglomeration mechanism for odor elimination is driven by solubility parameters, malodor molecules having poor water solubility are least likely go into the aqueous or polar solution and therefore most likely to desorb from the surface into the surrounding air. The formulations disclosed herein encourage this action for such malodorants. The disclosed formulations, which include a mixed solvent system, e.g. water/alcohol/glycol, can enhance the solubility of the malodor molecule in the applied product. The disclosed formulations offer a dual action odor elimination mechanism: desoiption of malodor from the surface as well as increased solubility of malodor molecules in the applied product. Odors that are desorbed from the surface into the surrounding air can be removed from the home by other means such as natural air change, i.e. ventilation.
[0032] Molecules solubilized by the mixed solvent system will ultimately remain in the low volatile liquids, e.g. glycol or TEA and desorb from the residual film at a much slower rate. The degree to which malodor molecules will be taken up in the mixed solvent systems can be controlled by adjusting the solubility parameters of the mixed solvent system to more closely match the solubility parameters of the malodor molecules.
[0033] Certain odorous compounds such as thiols, amines, acids and sulfides will readily dissolve into the agglomerations which, by way of an example, can comprise a core of the active ingredient (i.e., the glycol or other liquid with a vapor pressure at room temperature of less than O.OO35mmHg), carrier, fragrance and an outer portion that includes significant amounts of surfactant. Thus, the disclosed formulations do not mask odor-causing compounds and molecules; they keep them from being detected by reducing their vapor pressures.
[0034] Eight exemplary formulations are disclosed below. It should be noted that this disclosure is not limited to the particular seven formulations and acceptable ranges of the various ingredients are also set forth below. EXAMPLE 1
Wt % Name/Formula Function
92.325 de-ionized water solvent/carrier
6.0 ethanol, CH3CH2OH solvent/carrier
1.00 TEG, triethylene glycol odor remover HO(CH2)2θ(CH2)2θ(CH2)2θH
0.25 fragrance oil mixture (TAKASAGO RK- fragrance 1428, outdoor) 0.2650 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.11 SOFTANOL™ 70, polyoxyethyleπe nonionic surfactant alkylether
100.00
EXAMPLE 2
Name/Formula Function
92.325 de-ionized water solvent/carrier
6.0 ethanol, CH3CH2OH solvent/carrier
1.00 TEG, triethylene glycol odor remover
HO(CH2)2O(CH2)2O(CH2)2OH
0.25 fragrance oil mixture (TAKASAGO RK- fragrance
1428, outdoor)
0.2650 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.11 TERGirOL™ 15-S-7, polyglycol ether nonionic surfactant
100.00
EXAMPLE 3
Wt % Name/Formula Function
91.45 de-ionized water solvent/carrier 6.0 ethanol, CH3CH2OH solvent/carrier 1.00 TEG, triethylene glycol odor remover HO(CH2)2θ(CH2)20(CH2)2θH
0.40 fragrance oil mixture (TAKASAGO RK- fragrance 1428, outdoor)
0.50 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.50 TERGΓTOL™ 15-S-7, polyglycol ether nonionic surfactant
0.15 Agent 2248-14, quaternary ammonium salt cationic surfactant
100.00
EXAMPLE 4 wt% Name/Formula Function
91.2 de-ionized water solvent/carrier 6.0 ethanol, CH3CH2OH solvent/carrier 1.00 TEG, triethylene glycol odor remover HO(CH2)2θ(CH2)2θ(CH2)2θH
0.40 fragrance oil mixture (TAKASAGO RK- Fragrance 1428, outdoor) 0.50 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.50 TERGΠΌL™ 15-S-7, polyglycol ether nonionic surfactant
0.50 Agent 2248-14, quaternary ammonium salt cationic surfactant
100.00
EXAMPLE 5 Name/Formula Function
91.2 de-ionized water solvent/carrier
6.0 isopropanol, (CH3)2CHOH solvent/carrier
1.00 TEA, triethanolamine (HOCH2CH2)3N odor remover
0.40 fragrance oil mixture (TAKASAGO RK- fragrance 1428, outdoor)
0.50 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.50 TERGΓTOL™ 15-S-7, polyglycol ether nonionic surfactant
0.50 Agent 2248-14, quaternary ammonium salt cationic surfactant
100.00
EXAMPLE 6 wt% Name/Formula Function
91.2 de-ionized water solvent/carrier
6.0 isopropanol, (CH3)2CHOH solvent/carrier
1.00 Dipropylene glycol odor remover
0.40 fragrance oil mixture (TAKASAGO RK- fragrance 1428, outdoor)
0.50 PROTACHEM™ CAH-60, hydrogenated nonioπic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.50 TERGΠΌL™ 15-S-7, polyglycol ether nonionic surfactant
0.50 Agent 2248-14, quaternary ammonium salt cationic surfactant
100.00
EXAMPLE 7
Wt% Name/Formula Function
90.6 de-ionized water solvent/carrier 6.0 ethanol, CH3CH2OH solvent/carrier 1.00 TEG, triethylene glycol odor remover HO(CH2)2θ(CH2)2θ(CH2)2OH
0.40 fragrance oil mixture (TAKASAGO RK- Fragrance 1428, outdoor) 0.50 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.50 TERGΓΓOL™ 15-S-7, polyglycol ether nonionic surfactant
0.40 Agent 2248-14, quaternary ammonium salt cationic surfactant
0.60 nitrogen propellant
100.00
EXAMPLE 8
Wt % Name/Formula Function
71.2 de-ionized water solvent/carrier
6.00 ethanol, CH3CH2OH solvent/carrier
1.00 TEG, Methylene glycol odor remover
HO(CH2)2θ(CH2)2θ(CH2)2θH
0.40 fragrance oil mixture (TAKASAGO RK- Fragrance
1428, outdoor)
0.50 PROTACHEM™ CAH-60, hydrogenated nonionic surfactant castor oil (glycerol, polyethylene glycol oxystearate)
0.50 TERGΓTOL™ 15-S-7, polyglycol ether nonionic surfactant
0.40 Agent 2248-14, quaternary ammonium salt cationic surfactant
20.00 hydrocarbon propellant (LPG) propellant
100.00
[0035] Water and ethanol serve as carriers and co-solvents. The inclusion of ethanol, or an other short chain monohydric alcohol, provides for a faster dry time for the applied composition. Ethanol is also an excellent carrier and therefore assists in delivering the active ingredient to where it is needed. Additional co-solvents include glycol ethers such as glycol monoethyl ether and diethylene glycol butyl ether. The alcohol or glycol ether co-solvent should be present in the range of from about 1 to about 10wt%.
[0036] Because the TEG is provided in a suitable carrier and because it will not quickly evaporate once it has impregnated a soft surface, the amount of TEG may be relatively low as compared at an aerosol air sanitizing formulation. Typically, an air sanitizing formulation will have about 6wt% TEG; in this particular application, i.e., soft surfaces, the amount of TEG can be reduced to less than 5wt%. In the examples above, the TEG comprises 1.0wt% of the formulations. However, depending on the particular use or particular odors being treated, the TEG content can vary widely and could range from 0.5wt% to 6.0wt% or more. Examples 1-4 and 7-8 above, with their 1.0wt% TEG content, are merely currently preferred embodiments.
[0037] TEG is not the only glycol that can be used. Dipropylene glycol (Example 6) and propylene glycol are also suitable. Further, an active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than O.OO35mmHg may be utilized.
[0038] Another alternative to TEG or another glycol is triethanolamine (TEA). See Example 5. Like TEG, TEA is a liquid at room temperature, has a low vapor pressure at room temperature (3.6 x lO^mmHg) and has a non-offensive odor.
[0039] The fragrances utilized can be obtained from Takashago International Corp., a Japanese corporation having an office at 4 Volvo Drive, Rockleigh, New Jersey 07647 (http://www.takashago.com'). Of course, one skilled in the art will know that other suppliers of fragrances exist and this disclosure is not limited to the particular fragrances utilized herein. A preferred fragrance range is from about 0.25 to about 0.75wt%.
[0040] Novel combinations of surfactants/emulsifiers are also utilized. Examples 1 and 2 utilize only nonionic surfactants in the form of hydrogenated castor oils and polyglycol ethers. The hydrogenated castor oils are sold under the tradename PROTACHEM™ CAH-60 and the JNCI7CTFA chemical name "PEG-60 hydrogenated castor oil." These materials can be obtained from Protameen Chemicals, Inc., 375 Minnisik Road, Totowa, New Jersey 07511. The hydrogenated castor oil includes glycerol stearate, and if ethoxylated, includes polyethyelene glycol oxystearate.
[0041] The other nonionic surfactant or emulsifier utilized is either TERGJTOL™ 15-S-7, which is a polyglycol ether. It is available from Sigma- Aldrich, P.O. Box 14508, St. Louis, Missouri 63718 as well as the Dow Chemical Co., 2030 Dow Center, Midland, Michigan 48674. Other sources of TERGJTOL™ will be apparent to those skilled in the art. Another option for a nonionic surfactant is SOFTANOL™ 70, available from Nippon Shokubai of Osaka 541-0043, Japan. Other branched or linear, primary or secondary, polyethoxylated alcohols can be used as nonionic surfactants. [0042] Thus, Examples 1 and 2 include only nonionic surfactants. While these examples provide an excellent mechanism for delivering the active ingredient (e.g., TEG) and fragrance to odor-causing molecules residing in soft surfaces, it has been surprisingly found that the combination of nonionic and ionic surfactants provides still improved utility. Thus, small amounts of a quaternary ammonium salt in the form of Agent 2248-14 are added in Examples 3 through 8. The combination of the quaternary ammonium salt with the nonionic surfactants provides improved penetrability and delivery of TEG to the problematic areas within carpeting, upholstery, bedding, drapes, etc. By using a combination of nonionic and cationic surfactants, the disclosed formulations and methods provide a means for delivering TEG to odor-causing molecules buried deep within upholstery or carpeting. Thus, the TEG can be effectively delivered to deeply embedded odor-causing materials such as pet urine or other problematic odors. Further, Agent 2248-14 and other quaternary ammonium salts have anti-microbial properties and therefore add a sanitization function to the disclosed formulations. The total surfactant content preferably ranges from about 0.50 to about 2wt%.
[0043] The preferred quaternary ammonium salt (Agent 2248-14) is a mixture of alkyl dimethyl benzyl ammonium chloride and alkyl dimethyl ethyl benzyl ammonium chloride. It is sold by the Stepan Company, 22 Frontage Road, Northfield, IL 60093 (www.stepan.com) in a preparation that is 25wt% alkyl dimethyl benzyl ammonium chloride, 25wt% alkyl dimethyl ethyl benzyl ammonium chloride, 2-3wt% ethanol and the remainder water.
[0044] A wide variety of ionic surfactants are available and quaternary ammonium salts are not the only possibility. While cationic surfactants are utilized in the form of quaternary ammonium salts, other cationic surfactants will be apparent to those skilled in the art without undue experimentation.
[0045] Aerosol formulations are provided in Examples 7 and 8, using nitrogen propellant and hydrocarbon propellant respectively.
[0046] Therefore, the disclosed method and compositions provide a new application for TEG, other glycols and other materials that are liquids at room temperature and that have a vapor pressure of less than O.0035mmHg at room temperature, as a malodor absorbent for soft surfaces. The use of TEG has been extended to treating odors embedded in soft surfaces such as carpeting and upholstery. When the composition is applied, a layer or an agglomeration is formed within the soft surface substrate in close proximity to the malodor sources. The odor- causing molecules come into contact with the agglomeration and dissolve in the agglomeration thereby reducing their effective vapor pressure. Many malodorous components (thiols, amines, acids, sulfites, etc.), have a very low air/solvent partition coefficients (Henry's constant), which confirms the broad-spectrum odor suppression capability of TEG and other glycols. In summary, the malodorous components have a greater affinity for TEG than air thus reducing the vapor pressure and perception by the human sense of smell.
[0047] The agglomerations or droplets formed by the active ingredient (TEG, dipropylene glycol, propylene glycol, or material with a vapor pressure of less than 0.0035mmHg at room temperature), carrier, fragrance and surfactants have an inner portion or core where the active ingredient, fragrance, and some carrier accumulate and an outer surface or outer portion where the surfactant has accumulated. Odor- causing materials are absorbed through the outer (surfactant) layer into the core of the agglomeration resulting in a reduction of the vapor pressure and therefore odor reduction.
[0048] The examples disclosed above are micro emulsions of fragrance, TEG, ethanol and water. When applied, the micro emulsion penetrates into the spaces between fibers of a soft surface. Upon evaporation, most of the volatile components (water and ethanol) are removed and a residual agglomeration or droplet of TEG, ethanol, water, fragrance and surfactant serves as an absorbent for odor-causing compounds and molecules. The agglomerations also serve as fragrance extenders.
[0049] While only certain embodiments have been set forth, alternative embodiments and various modifications will be apparent from the above descriptions of those skilled in the art. These and other alternatives are considered equivalents and within the spirit and scope of this disclosure.

Claims

WHAT IS CLAIMED:
1. A method for treating odors embedded in or adsorbed onto a soft surface, the method comprising: applying a liquid composition onto a soft surface wherein the composition comprises at least one active ingredient that is a liquid at room temperature and that has a vapor pressure of less than O.OO35mmHg at room temperature; allowing the composition to absorb into the soft surface and make contact with a malodorant disposed within the soft surface.
2. The method of claim 1 further comprising allowing the composition to form agglomerations within the soft surface; absorbing malodorants disposed in the soft surface into the agglomerations.
3. The method of claim 2 further comprising: allowing at some malodorant to desorb from the soft surface and enter an ambient gas phase.
4. The method of claim 2 wherein the composition further comprises water and an alcohol or a glycol ether.
5. The method of claim 2 wherein the composition further comprises at least one surfactant.
6. The method of claim 5 wherein the surfactants comprise ionic and nonionic surfactants.
7. The method of claim 6 wherein the surfactants comprise a polyglycol ether, hydrogenated oil and a quaternary ammonium salt.
8. The method of claim 1 wherein the composition further comprises water, ethanol or a glycol ether, fragrance, at least one nonionic surfactant and at least cationic surfactant.
9. The method of claim 8 wherein the active ingredient is a glycol selected from the group consisting of triethylene glycol (TEG), dipropylene glycol, and propylene glycol, wherein the glycol is present in an amount ranging from about 0.5 to about 1.5 wt%.
10. . The method of claim 9 wherein the cationic surfactant comprises a quaternary ammonium salt.
11. The method of claim 10 wherein the nonionic surfactants comprise hydrogenated castor oil and a polyglycol ether.
12. The method of claim 1 wherein the composition comprises: from about 1 to about 10 wt% ethanol; the active ingredient is triethylene glycol (TEG) that is present in an amount ranging from about 0.5 to about 1.5 wt%; from about 0.25 to about 0.75 wt% fragrance; from about 0.5 to about 2 wt% nonionic and ionic surfactants; and the remainder water.
13. The method of claim 12 wherein the surfactants comprise hydrogenated castor oil, a polyglycol ether and a quaternary ammonium salt.
14. A composition for treating odors in soft surfaces, the composition comprising: a short chain monohydric alcohol or a glycol ether at least one active ingredient that is a liquid at room temperature and that has a vapor pressure at room temperature of less than O.OO35mmHg; at least one surfactant; and water.
15. The composition of claim 14 wherein the at least one surfactant comprises nonionic and cationic surfactants.
16. The composition of claim 14 wherein at least one surfactant comprises a polyglycol ether and a hydrogenated oil and a quaternary ammonium salt.
17. The composition of claim 16 wherein the hydrogenated oil is a hydrogenated castor oil and the polyglycol ether is a polyoxyethylene alkylether.
18. The composition of claim 14 wherein the active ingredient is selected from the group consisting of Methylene glycol (TEG), dipropylene glycol, propylene glycol and triethanolamine (TEA), and is present in an amount ranging from about 0.5 to about 1.5 wt%.
19. The composition of claim 18 wherein the active ingredient is TEA.
20. The composition of claim 14 wherein the alcohol is ethanol and is present from about 1 to about 10 wt%; the active ingredient is triethylene amine present from about 0.5 to about 1.5 wt%; from about 0.25 to about 0.75 wt% fragrance; from about 0.5 to about 2 wt% nonionic and ionic surfactants; and the remainder water.
21. The composition of claim 20 wherein the surfactants comprise hydrogenated castor oil, at least one polyglycol ether and a quaternary ammonium salt.
22. A composition for treating odors embedded in or adsorbed onto soft surfaces, the composition comprising: from about 1 to about 10 wt% ethanol; from about 0.5 to about 1.5 wt% TEG; from about 0.25 to about 0.75 wt% fragrance; from about 0.5 to about 1.5 wt% nonionic surfactants including a hydrogenated oil and a polyglycol ether; from about 0.1 to about 1 wt% of quaternary ammonium salt as an ionic surfactant; and the remainder water.
23. A method for treating odors embedded in soft surfaces, the method comprising: applying a liquid composition onto a soft surface wherein the composition comprises triethylene glycol, at least one short chain monohydric alcohol, water, a combination of ionic and nonionic surfactants, allowing the composition to absorb into the soft surface and make contact with a malodorant disposed within the soft surface; allowing the composition to form agglomerations within the soft surface; absorbing malodorants disposed in the soft surface into the agglomerations.
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Cited By (2)

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