WO2012151441A1 - Natural antimicrobial compositions - Google Patents
Natural antimicrobial compositions Download PDFInfo
- Publication number
- WO2012151441A1 WO2012151441A1 PCT/US2012/036391 US2012036391W WO2012151441A1 WO 2012151441 A1 WO2012151441 A1 WO 2012151441A1 US 2012036391 W US2012036391 W US 2012036391W WO 2012151441 A1 WO2012151441 A1 WO 2012151441A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- natural
- antimicrobial composition
- product
- antimicrobial
- Prior art date
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
- A01N31/02—Acyclic compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
- A61K8/345—Alcohols containing more than one hydroxy group
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/36—Carboxylic acids; Salts or anhydrides thereof
- A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/36—Carboxylic acids; Salts or anhydrides thereof
- A61K8/368—Carboxylic acids; Salts or anhydrides thereof with carboxyl groups directly bound to carbon atoms of aromatic rings
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
- A61Q17/005—Antimicrobial preparations
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61Q19/00—Preparations for care of the skin
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- A61Q19/10—Washing or bathing preparations
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q5/00—Preparations for care of the hair
- A61Q5/02—Preparations for cleaning the hair
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- A61Q5/12—Preparations containing hair conditioners
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- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C—CHEMISTRY; METALLURGY
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
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- 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
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- C11D3/2003—Alcohols; Phenols
- C11D3/2006—Monohydric alcohols
- C11D3/2034—Monohydric alcohols aromatic
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- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C10L1/1826—Organic compounds containing oxygen containing hydroxy groups; Salts thereof hydroxy group directly attached to (cyclo)aliphatic carbon atoms poly-hydroxy
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- C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
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- C10M2207/124—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms containing hydroxy groups; Ethers thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/141—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings monocarboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/144—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings containing hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/16—Antiseptic; (micro) biocidal or bactericidal
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/4935—Impregnated naturally solid product [e.g., leather, stone, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2525—Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]
Definitions
- the present invention relates to antimicrobial mixtures, for instance, comprising (a) two or more fatty acids, each of which is natural or naturally derived, and (b) at least one of (i) a natural or naturally derived product, (ii) an alcoholic solvent, or (iii) an organic acid.
- the antimicrobial compositions of the present invention are relatively cheap to make, easy to work with and incorporate into finished products, generally have no odor, and have reduced (compared to prior oil preservative systems) or no color.
- One embodiment of the present invention is an antimicrobial composition
- an antimicrobial effective amount such as a preservative, bactericidal, and/or fungicidal effective amount
- a mixture comprising:
- Preferred mixtures of the present invention include, but are not limited to, those shown in the table below.
- the present inventor has discovered that the combination of (a) lauric acid, (b) caprylic acid, and (c) glycereth-2 cocoate or 1,3-propanediol acts synergistically against bacteria and fungi, is readily soluble in aqueous systems, can readily solubilize waxy fatty acids, and forms a stable concentrate.
- caprylic acid solubilizes lauric acid to form a stable antimicrobial mixture. Lauric acid is generally not soluble in aqueous solutions.
- caprylic acid preferably natural or naturally derived
- this mixture is present at a concentration of from about 0.01 to about 2% by weight, based on 100% total weight of the composition.
- an antimicrobial composition consisting essentially of an antimicrobial effective amount of a mixture consisting essentially of two or more fatty acids, each of which is natural or naturally derived.
- Suitable natural or naturally derived fatty acids include, but are not limited to, caprylhydroxamic acid, lauric acid, caprylic acid, capric acid, palmitic acid, and any combination of any of the foregoing.
- a preferred mixture consists essentially of caprylic acid and lauric acid.
- the mixture consists essentially of at least about 50% by weight of caprylic acid, based upon 100% total weight of the antimicrobial mixture.
- an alcoholic solvent for example, natural benzyl alcohol
- the mixture comprises caprylic acid, glycereth-2 cocoate, and ethylhexyl glycerin.
- an alcoholic solvent e.g., ethylhexyl glycerin
- the mixture comprises 1,3-propanediol (natural or naturally-derived), ethylhexyl glycerin, and potassium sorbate.
- Preferred mixtures of the invention include, but are not limited to, those shown in the table below.
- One more preferred mixture comprises about 83% by weight of 1 ,3- propanediol (natural or naturally-derived), about 10% ethylhexyl glycerin, and about 7% potassium sorbate.
- the mixtures of the present invention include an antimicrobial (e.g., preservative, bactericidal, and/or fungicidal) synergistic effective amount of the aforementioned ingredients.
- the antimicrobial composition is preferably substantially free or completely free of parabens (such as methylparaben, ethylparaben, and propylparaben).
- the antimicrobial composition contains less than about 2, 1.5, 1, 0.5, 0.4, 0.3, 0.25, 0.2, 0.15, 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, or 0.01% by weight of parabens, formaldehyde donors, and/or isothiazolinones, based upon 100% total weight of antimicrobial composition.
- the antimicrobial composition is substantially free or completely free of synthetic preservatives.
- the antimicrobial composition contains less than about 2, 1.5, 1, 0.5, 0.4, 0.3, 0.25, 0.2, 0.15, 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, or 0.01% by weight of synthetic preservatives, based upon 100% total weight of antimicrobial composition.
- Preferred mixtures of the present invention include, but are not limited to, those shown in the table below.
- the pH of the concentrates of the antimicrobial mixtures of the present invention preferably have a pH below about 9.
- the antimicrobial mixtures of the present invention are used at a concentration of from about 0.1 % to about 2% by weight.
- the antimicrobial mixture includes caprylic acid and a waxy fatty acid (for instance, lauric acid).
- a waxy fatty acid for instance, lauric acid.
- the inventors have found that caprylic acid facilitates solubilization and stability of the waxy fatty acid thereby enhancing its antimicrobial efficacy.
- the antimicrobial mixtures and compositions of the present invention may be free or substantially free of oils.
- Another embodiment is a method of killing and/or inhibiting the growth of microorganisms on a substrate or in or on a product by applying an effective amount of the antimicrobial composition of the present invention to the substrate or the product.
- Yet another embodiment is a product comprising an antimicrobial, preservative, bactericidal, and/or fungicidal effective amount of the antimicrobial composition of the present invention.
- the product may be a solid or liquid.
- the antimicrobial compositions of the present invention are particularly effective as preservatives for personal care products.
- Yet another embodiment is a method of preserving a product (e.g., a personal care product) by incorporating a preservative effective amount of the antimicrobial composition of the present invention into the product.
- a product e.g., a personal care product
- Yet another embodiment is a product (such as a shampoo) comprising a preservative effective amount of the antimicrobial composition of the present invention.
- the product is generally substantially free or completely free of parabens (such as methylparaben, ethylparaben, and propylparaben).
- the product may be, for example, a household (e.g., personal care), industrial, or institutional product.
- Preferred personal care products include, but are not limited to, shampoos, lotions (e.g., body lotions), conditioners, and soaps.
- Suitable household products include, but are not limited to, fabric softeners, laundry detergents, and hard surface cleaners.
- the product contains less than about 2, 1.5, 1, 0.5, 0.4, 0.3, 0.25, 0.2, 0.15, 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, or 0.01% by weight of parabens, based upon 100% total weight of product.
- the product does not contain a preservative effective amount of a preservative other than components (a) and (b) above.
- the only preservatives in the product are components (a) and (b).
- the product is all natural.
- the product contains less than a smelling or coloring effective amount of the antimicrobial composition.
- the product for example, a shampoo
- these antimicrobial mixtures are natural thickening agents. Accordingly, they can be incorporated into formulations in a thickening effective amount (for example, to thicken a shampoo or other personal care product).
- a thickening effective amount for example, to thicken a shampoo or other personal care product.
- microorganisms includes, but is not limited to, bacteria, fungi, yeasts, algae, insects, and pests.
- personal care products refers to products intended for application to the human body, such as to skin, hair, and nails, including, but not limited to, shampoos, conditioners, creams, lotions (such as body lotions), cosmetics, and soaps.
- the natural or naturally derived fatty acid may be a waxy fatty acid.
- Suitable natural or naturally derived fatty acids include, but are not limited to, lauric acid, caprylic acid, capric acid, palmitic acid, and any combination of any of the foregoing.
- the antimicrobial mixture contains caprylic acid and a waxy fatty acid (such as lauric acid).
- Suitable natural or naturally derived products include, but are not limited to, 1,3-propanediol (natural or naturally-derived), glycereth-2 cocoate, benzyl alcohol (naturally derived), glycerin, and any combination of any of the foregoing.
- a preferred natural or naturally derived product is 1,3-propanediol (natural or naturally- derived).
- Suitable alcoholic solvents include, but are not limited to, ethylhexyl glycerin, phenoxyethanol, caprylyl glycols, pentylene glycol, hexylene glycol, and any combination of any of the foregoing.
- Suitable organic acids and their salts include, but are not limited to, sorbic acid or a salt thereof (for example, potassium sorbate), benzoic acid or a salt thereof (for example, sodium benzoate), citric acid or a salt thereof, and any combination of any of the foregoing.
- Suitable salts of organic acids include, but are not limited to, alkali metal or alkali earth metal salts, such as potassium and sodium. Examples of Preferred Mixtures
- Preferred mixtures include, but are not limited to, those in the table below. Preferred concentrations and preferred weight ratios are also provided in the table.
- the antimicrobial compositions of the present invention are useful as antimicrobial, fungicidal, and bactericidal agents (such as against allergens, tree and plant fungi, and plant and tree bacteria) and as preservatives in the papermaking, textile, agricultural, and coating industries and in personal care, household, industrial, and institutional products.
- the antimicrobial composition may be incorporated into substrates susceptible to microbial growth to preserve them.
- the preservative system may be incorporated into or be a personal care product, such as a shampoo, conditioner, cream, lotion (such as body lotion), cosmetic, or soap; a household product, such as a fabric softener, laundry detergent, or hard surface cleaner; or an industrial product, such as paint, coatings, wood, textile, adhesive, sealant, leather, rope, paper, pulp, paper board, sheet rock, ceiling tiles, plastic, fuel, petroleum, oil, rubber working fluid, metal working fluid, starches (such as pet food starch), or mineral slurry, such as a slurry of clay, calcium carbonate, or titanium oxide ( ⁇ 2 ).
- a personal care product such as a shampoo, conditioner, cream, lotion (such as body lotion), cosmetic, or soap
- a household product such as a fabric softener, laundry detergent, or hard surface cleaner
- an industrial product such as paint, coatings, wood, textile, adhesive, sealant, leather, rope, paper, pulp, paper board, sheet rock, ceiling tiles, plastic, fuel, petroleum, oil, rubber working fluid,
- the product contains an antimicrobial, preservative, bactericidal, and/or fungicidal effective amount of the antimicrobial composition.
- the product contains from about 0.01 to about 2.0% by weight of each component of the antimicrobial composition, based upon 100% total weight of product.
- the product includes from about 0.1 to about 1 or 2% by weight of the antimicrobial composition, based upon 100% weight of total product.
- the preservative system is useful as antimicrobial, fungicidal, and bactericidal agents (such as against allergens, tree fungi, and tree bacteria) and as preservatives in the papermaking, textile, agricultural, and coating industries and in personal care, household, industrial, and institutional products.
- the preservative system may be incorporated into substrates susceptible to microbial growth to preserve them.
- the preservative system may be incorporated into or be a personal care product, such as a shampoo, conditioner, cream, lotion (such as body lotion), cosmetic, or soap; a household product, such as a fabric softener, laundry detergent, or hard surface cleaner; or an industrial product, such as paint, coatings, wood, textile, adhesive, sealant, leather, rope, paper, pulp, paper board, sheet rock, ceiling tiles, plastic, fuel, petroleum, oil, rubber working fluid, metal working fluid, starches (such as pet food starch), or mineral slurry, such as a slurry of clay, calcium carbonate, or titanium oxide (T1O 2 ).
- a personal care product such as a shampoo, conditioner, cream, lotion (such as body lotion), cosmetic, or soap
- a household product such as a fabric softener, laundry detergent, or hard surface cleaner
- an industrial product such as paint, coatings, wood, textile, adhesive, sealant, leather, rope, paper, pulp, paper board, sheet rock, ceiling tiles, plastic, fuel, petroleum, oil, rubber working
- the antimicrobial composition and preservative system of the present invention acts quickly (e.g., reduces the microorganism (e.g., bacteria and/or fungi) count by 95, 99, 99.9, or 99.99% typically within an hour) and maintains efficacy (e.g., maintains less than 10 cfu/g) over long periods of time (e.g., for at least 7, 10, 14, or 28 days).
- efficacy e.g., maintains less than 10 cfu/g
- the term "preservative effective amount” refers to an amount of the preservative system which maintains the microorganism count below 1000, 100, or 10 cfu/g for at least 1, 4, 7, 10, 14, or 28 days.
- the antimicrobial composition and preservative system may include a solvent, such as water and water miscible solvents, including, but not limited to, alcohols (e.g., methanol, ethanol, propanol, iso-propanol, and butanol), glycols (e.g. glycerin, diglycerin, butylene glycol, butoxydiglycol, propylene glycol, and dipropylene glycol), esters, ethers, polyethers, and any combination of any of the foregoing.
- the solvent may comprise water and one or more glycol and/or one or more alcohol, such as glycerin, phenoxyethanol, benzyl alcohol, or ethanol.
- a specific solvent system comprises water and a glycol, such as glycerin.
- a second specific solvent system comprises water and an alcohol, such as ethanol.
- adjuvants may be included in the antimicrobial composition and preservative system as known to one of ordinary skill in the art.
- Suitable adjuvants include, but are not limited to, preservatives; solubilizing agents; chelating agents, such as ethylenediaminetetraacetic acid (EDTA) and salts thereof and zeolites; surfactants, such as cationic, anionic, nonionic, and amphoteric surfactants; antioxidants, such as butylated hydroxyanisole (BHA) and butylhydroxytoluene (BHT); amine oxides; tertiary amines; zinc compounds; hydrotropes; fluoride compounds; magnesium salts; calcium salts; carboxylic acids; phosphates; phosphonates; formaldehyde donors; glycereth-7; myristyl myristate; glutaraldehydes; biguanides; natural products, such as geranoil, usnic acid, and tea tree oils; and
- Suitable preservatives include, but are not limited to, quaternary ammonium chlorides; quaternary ammonium carbonates; benzalkonium chloride; iodine containing compounds, such as 3-iodo-2-propynyl butyl carbamate (IPBC); hydantoins, such as dimethylhydantoin and halogenated hydantoins; isothiazolinones; parabens, such as methylparaben, ethylparaben, and propylparaben; dehydroacetic acid and salts thereof; isocil; chloroxylenol; chlorhexidine; phenoxyethanol; benzyl alcohol; phenethyl alcohol; benzoic acid and salts thereof such as sodium benzoate; chlorobutanol; sorbic acid and salts thereof; triclosan; triclocarban; and any combination of any of the foregoing.
- IPBC 3-iodo-2
- the antimicrobial composition and preservative system may be incorporated into an aqueous or oil based system or an emulsion.
- a suitable solvent for an oil based system is phenoxyethanol and/or benzyl alcohol.
- the antimicrobial composition is comprised of all natural products.
- the antimicrobial composition can be a liquid or a solid.
- the weight ratio of the first component to the second component typically ranges from about 0.01 : 100 to about 100:0.01, preferably ranges from about 0.1 :20 to about 20:0.1, and more preferably ranges from about 1: 10 to about 10: 1.
- the third component can be in any amount, but typically the weight ratio of the third component to either of the first two components is from about 0.01 : 100 to about 100:0.01.
- a concentrate of the antimicrobial composition and preservative system is generally first prepared.
- the concentrate may include from about 0.01 to about 100% by weight of the antimicrobial composition and preferably contains from about 5 to about 80% by weight of the antimicrobial composition, based upon 100% total weight of concentrate.
- the concentrate broadly contains from about 0.01 to about 99.99% by weight of the first component (e.g., component (a)) and from about 99.99% to about 0.01% by weight of the second component (i.e., component (b)) (based upon 100% total weight of concentrate).
- Table A illustrates the components and the ranges of components present in a typical concentrate for the two-component antimicrobial mixtures (based upon 100% total weight of concentrate).
- Table B illustrates the components and the ranges of components present in a typical concentrate for the three-component antimicrobial mixtures (based upon 100% total weight of concentrate).
- the concentrate Before use, the concentrate is diluted, preferably with the same solvent as was used in the concentrate, and/or incorporated into a product.
- Use dilutions of the composition typically comprise an antimicrobial, preservative, fungicidally, or bactericidally effective amount of the antimicrobial composition.
- use dilutions contain from about 0.0001% or 0.01% to about 2% by weight of the concentrate. According to one preferred embodiment, use dilutions contain from about 0.1 to about 1% by weight of the concentrate. In more preferred embodiments, the use dilution contains 0.2, 0.25 or 0.30% by weight of the concentrate. The use dilution generally contains from about 0.01, to about 2.0% by weight of each antimicrobial ingredient, based upon 100% total weight of use dilution.
- the antimicrobial composition contains from about 0.001 to about 10%, preferably from about 0.01 to about 1%, and more preferably from about 0.05 to about 0.5% by weight of each antimicrobial ingredient (e.g., caprylic acid and/or lauric acid).
- Table C illustrates the components and generally the ranges of components present in the use dilution (based upon 100% total weight of use dilution) made from a two-component antimicrobial mixture.
- Table D illustrates the components and generally the ranges of components present in the use dilution (based upon 100% total weight of use dilution) made from a three-component antimicrobial mixture.
- the use dilution includes from about 0.01 to about 1% by weight of component (a), and from about 0.01 to about 1% by weight of component (b). In yet another embodiment, the use dilution includes from about 0.05 to about 0.5% by weight of component (a), and from about 0.05 to about 0.5% by weight of component (b). According to another embodiment, the aforementioned antimicrobial composition is incorporated into a product at a concentration of about 0.1 to about 1 or 2% by weight, based upon 100% total weight of product.
- Another embodiment of the present invention is a method for inhibiting the growth of microorganisms, bacteria (e.g., S. aureus (ATCC #6538), P. aeruginosa (ATCC #9027), and E. coli (ATCC #8739)), and/or fungi (including plant and tree fungi) (e.g., Candida albicans, Aspergillus niger and Phytophthora ramrum) on a substrate by applying an antimicrobial, preservative, bactericidal, or fungicidal effective amount of the antimicrobial composition of the present invention to the substrate.
- the antimicrobial composition may be applied to the substrate by any method known in the art including, but not limited to, brushing, dipping, soaking, vacuum impregnation, and pressure treatment.
- the antimicrobial composition of the present invention may be prepared by mixing the antimicrobial components, and optionally, solvents, and adjuvants. The mixture may be heated and/or stirred to expedite mixing.
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Abstract
The present invention provides novel antimicrobial compositions. In one embodiment, the antimicrobial composition comprises an antimicrobial effective amount of a mixture comprising (a) two or more fatty acids, each of which is natural or naturally derived, and (b) at least one of (i) a natural or naturally derived product, (ii) an alcoholic solvent, or (iii) an organic acid or a salt thereof. The present invention also provides a product comprising a preservative effective amount of the aforementioned mixture.
Description
NATURAL ANTIMICROBIAL COMPOSITIONS
The present application claims the benefit of U.S. Provisional Application No. 61/482,353, filed May 4, 2011, which is hereby incorporated by reference.
Field of the Invention
The present invention relates to antimicrobial mixtures, for instance, comprising (a) two or more fatty acids, each of which is natural or naturally derived, and (b) at least one of (i) a natural or naturally derived product, (ii) an alcoholic solvent, or (iii) an organic acid.
Background
There are many drawbacks to currently available natural and naturally-derived antimicrobial formulations. They are expensive, and high concentrations of them (for instance, > 2%) are often required to prevent microbial growth and preserve a product. Many have undesirable colors and odors, have poor stability (for example, in aqueous systems), and are not effective against a broad spectrum of microorganisms. Additionally, some such natural or naturally-derived antimicrobial mixtures cause thinning of formulations. Many are oils or extracts which limits their usage in various formulations.
There is a continuing need for low cost and safe natural preservative systems which are effective against a broad spectrum of microorganisms.
Summary of the Invention
The antimicrobial compositions of the present invention are relatively cheap to make, easy to work with and incorporate into finished products, generally have no odor, and have reduced (compared to prior oil preservative systems) or no color.
One embodiment of the present invention is an antimicrobial composition comprising an antimicrobial effective amount (such as a preservative, bactericidal, and/or fungicidal effective amount) of a mixture comprising:
(a) (i) two or more fatty acids, each of which is natural or naturally derived, or (ii) a fatty acid and anisic acid, each of which is natural or naturally derived; and
(b) at least one of
(i) a natural or naturally derived product,
(ii) an alcoholic solvent, or
(iii) an organic acid or a salt thereof.
Preferred mixtures of the present invention include, but are not limited to, those shown in the table below.
The present inventor has discovered that the combination of (a) lauric acid, (b) caprylic acid, and (c) glycereth-2 cocoate or 1,3-propanediol acts synergistically against bacteria and fungi, is readily soluble in aqueous systems, can readily solubilize waxy fatty acids, and forms a stable concentrate. The inventor has also
discovered that caprylic acid solubilizes lauric acid to form a stable antimicrobial mixture. Lauric acid is generally not soluble in aqueous solutions.
Another embodiment is an antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising:
(a) caprylic acid (preferably natural or naturally derived),
(b) at least one waxy fatty acid, each of which is natural or naturally derived, and
(c) at least one of
(i) a natural or naturally derived product,
(ϋ) an alcoholic solvent, or
(iii) an organic acid.
In one embodiment, this mixture is present at a concentration of from about 0.01 to about 2% by weight, based on 100% total weight of the composition.
Yet another embodiment is an antimicrobial composition consisting essentially of an antimicrobial effective amount of a mixture consisting essentially of two or more fatty acids, each of which is natural or naturally derived. Suitable natural or naturally derived fatty acids include, but are not limited to, caprylhydroxamic acid, lauric acid, caprylic acid, capric acid, palmitic acid, and any combination of any of the foregoing. A preferred mixture consists essentially of caprylic acid and lauric acid. In a more preferred embodiment, the mixture consists essentially of at least about 50% by weight of caprylic acid, based upon 100% total weight of the antimicrobial mixture.
Yet another embodiment is an antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising:
(a) caprylic acid, which is natural or naturally derived,
(b) a natural or naturally derived product,
(c) an alcoholic solvent (for example, natural benzyl alcohol), and
(d) optionally, an organic acid or a salt thereof.
In one preferred embodiment, the mixture comprises caprylic acid, glycereth-2 cocoate, and ethylhexyl glycerin.
Yet another embodiment is an antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising:
(a) 1,3-propanediol (natural or naturally-derived),
(b) an alcoholic solvent (e.g., ethylhexyl glycerin), and
(c) optionally, an organic acid or a salt thereof (e.g., sorbic acid or a salt thereof).
In one preferred embodiment, the mixture comprises 1,3-propanediol (natural or naturally-derived), ethylhexyl glycerin, and potassium sorbate.
Preferred mixtures of the invention include, but are not limited to, those shown in the table below.
One more preferred mixture comprises about 83% by weight of 1 ,3- propanediol
(natural or naturally-derived), about 10% ethylhexyl glycerin, and about 7% potassium sorbate.
Preferably the mixtures of the present invention include an antimicrobial (e.g., preservative, bactericidal, and/or fungicidal) synergistic effective amount of the aforementioned ingredients. The antimicrobial composition is preferably substantially free or completely free of parabens (such as methylparaben, ethylparaben, and propylparaben). According to one embodiment, the antimicrobial composition contains less than about 2, 1.5, 1, 0.5, 0.4, 0.3, 0.25, 0.2, 0.15, 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, or 0.01% by weight of parabens, formaldehyde donors, and/or isothiazolinones, based upon 100% total weight of antimicrobial composition. In another embodiment, the antimicrobial composition is substantially free or completely free of synthetic preservatives. According to one embodiment, the antimicrobial composition contains less than about 2, 1.5, 1, 0.5, 0.4, 0.3, 0.25, 0.2, 0.15, 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, or 0.01% by weight of synthetic preservatives, based upon 100% total weight of antimicrobial composition.
Preferred mixtures of the present invention include, but are not limited to, those shown in the table below.
Mixture Component (a) Component (b) No.
1 about 45% caprylic acid + about 25% 1,3-propanediol + about 20% lauric acid about 10% potassium sorbate
2 about 50% caprylic acid + about 25% 1,3-propanediol about 25% lauric acid
3 about 60% caprylic acid about 30% glycereth-2 cocoate + about 10% ethylhexyl glycerin (EHG)
4 about 40% caprylic acid + about 25% glycereth-2 about 20% lauric acid cocoate + about 20% lactic acid
5 about 70% caprylic acid about 30% lauric acid
6 about 80% 1,3-propanediol about 10% ethylhexyl glycerin + about 10% potassium sorbate
7 about 45% caprylic acid + about 25% 1,3-propanediol + about 20% lauric acid about 10% benzoic acid
The pH of the concentrates of the antimicrobial mixtures of the present invention preferably have a pH below about 9.
In one embodiment, the antimicrobial mixtures of the present invention are used at a concentration of from about 0.1 % to about 2% by weight.
In one preferred embodiment, the antimicrobial mixture includes caprylic acid and a waxy fatty acid (for instance, lauric acid). The inventors have found that caprylic acid facilitates solubilization and stability of the waxy fatty acid thereby enhancing its antimicrobial efficacy.
The antimicrobial mixtures and compositions of the present invention may be free or substantially free of oils.
Another embodiment is a method of killing and/or inhibiting the growth of microorganisms on a substrate or in or on a product by applying an effective amount of the antimicrobial composition of the present invention to the substrate or the product.
Yet another embodiment is a product comprising an antimicrobial, preservative, bactericidal, and/or fungicidal effective amount of the antimicrobial composition of the present invention. The product may be a solid or liquid. The antimicrobial compositions of the present invention are particularly effective as preservatives for personal care products.
Yet another embodiment is a method of preserving a product (e.g., a personal care product) by incorporating a preservative effective amount of the antimicrobial composition of the present invention into the product.
Yet another embodiment is a product (such as a shampoo) comprising a preservative effective amount of the antimicrobial composition of the present invention. The product is generally substantially free or completely free of parabens (such as methylparaben, ethylparaben, and propylparaben). The product may be, for example, a household (e.g., personal care), industrial, or institutional product. Preferred personal care products include, but are not limited to, shampoos, lotions (e.g., body lotions), conditioners, and soaps. Suitable household products include, but are not limited to, fabric softeners, laundry detergents, and hard surface cleaners. According to one embodiment, the product contains less than about 2, 1.5, 1, 0.5, 0.4, 0.3, 0.25, 0.2, 0.15, 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, or 0.01% by weight of parabens, based upon 100% total weight of product. According to one embodiment, the product does not contain a preservative effective amount of a preservative other than components (a) and (b) above. According to another embodiment, the only preservatives in the product are components (a) and (b). According to yet another embodiment, the product is all natural. According to yet another embodiment, the product contains less than a smelling or coloring effective amount of the antimicrobial composition.
In one embodiment, the product (for example, a shampoo) has a pH below about 8.
The components of these antimicrobial mixtures are natural thickening agents. Accordingly, they can be incorporated into formulations in a thickening effective amount (for example, to thicken a shampoo or other personal care product).
Detailed Description of the Invention
Definitions
The term "microorganisms" includes, but is not limited to, bacteria, fungi, yeasts, algae, insects, and pests.
The term "personal care products" refers to products intended for application to the human body, such as to skin, hair, and nails, including, but not limited to, shampoos, conditioners, creams, lotions (such as body lotions), cosmetics, and soaps.
Components for the Antimicrobial Mixture
The natural or naturally derived fatty acid may be a waxy fatty acid. Suitable natural or naturally derived fatty acids include, but are not limited to, lauric acid, caprylic acid, capric acid, palmitic acid, and any combination of any of the foregoing. In one preferred embodiment, the antimicrobial mixture contains caprylic acid and a waxy fatty acid (such as lauric acid).
Suitable natural or naturally derived products include, but are not limited to, 1,3-propanediol (natural or naturally-derived), glycereth-2 cocoate, benzyl alcohol (naturally derived), glycerin, and any combination of any of the foregoing. A preferred natural or naturally derived product is 1,3-propanediol (natural or naturally- derived).
Suitable alcoholic solvents include, but are not limited to, ethylhexyl glycerin, phenoxyethanol, caprylyl glycols, pentylene glycol, hexylene glycol, and any combination of any of the foregoing.
Suitable organic acids and their salts include, but are not limited to, sorbic acid or a salt thereof (for example, potassium sorbate), benzoic acid or a salt thereof (for example, sodium benzoate), citric acid or a salt thereof, and any combination of any of the foregoing. Suitable salts of organic acids (such as sorbic acid and benzoic acid) include, but are not limited to, alkali metal or alkali earth metal salts, such as potassium and sodium.
Examples of Preferred Mixtures
Preferred mixtures include, but are not limited to, those in the table below. Preferred concentrations and preferred weight ratios are also provided in the table.
Antimicrobial Compositions
The antimicrobial compositions of the present invention are useful as antimicrobial, fungicidal, and bactericidal agents (such as against allergens, tree and plant fungi, and plant and tree bacteria) and as preservatives in the papermaking,
textile, agricultural, and coating industries and in personal care, household, industrial, and institutional products. The antimicrobial composition may be incorporated into substrates susceptible to microbial growth to preserve them. For example, the preservative system may be incorporated into or be a personal care product, such as a shampoo, conditioner, cream, lotion (such as body lotion), cosmetic, or soap; a household product, such as a fabric softener, laundry detergent, or hard surface cleaner; or an industrial product, such as paint, coatings, wood, textile, adhesive, sealant, leather, rope, paper, pulp, paper board, sheet rock, ceiling tiles, plastic, fuel, petroleum, oil, rubber working fluid, metal working fluid, starches (such as pet food starch), or mineral slurry, such as a slurry of clay, calcium carbonate, or titanium oxide (ΉΟ2).
Generally, the product contains an antimicrobial, preservative, bactericidal, and/or fungicidal effective amount of the antimicrobial composition. According to one embodiment, the product contains from about 0.01 to about 2.0% by weight of each component of the antimicrobial composition, based upon 100% total weight of product. According to another embodiment, the product includes from about 0.1 to about 1 or 2% by weight of the antimicrobial composition, based upon 100% weight of total product.
Preservative Systems
The mixture of components discussed above (hereinafter referred to as "the preservative system") are useful as antimicrobial, fungicidal, and bactericidal agents (such as against allergens, tree fungi, and tree bacteria) and as preservatives in the papermaking, textile, agricultural, and coating industries and in personal care, household, industrial, and institutional products. The preservative system may be incorporated into substrates susceptible to microbial growth to preserve them. For example, the preservative system may be incorporated into or be a personal care product, such as a shampoo, conditioner, cream, lotion (such as body lotion), cosmetic, or soap; a household product, such as a fabric softener, laundry detergent, or hard surface cleaner; or an industrial product, such as paint, coatings, wood, textile, adhesive, sealant, leather, rope, paper, pulp, paper board, sheet rock, ceiling tiles,
plastic, fuel, petroleum, oil, rubber working fluid, metal working fluid, starches (such as pet food starch), or mineral slurry, such as a slurry of clay, calcium carbonate, or titanium oxide (T1O2).
Generally, the antimicrobial composition and preservative system of the present invention acts quickly (e.g., reduces the microorganism (e.g., bacteria and/or fungi) count by 95, 99, 99.9, or 99.99% typically within an hour) and maintains efficacy (e.g., maintains less than 10 cfu/g) over long periods of time (e.g., for at least 7, 10, 14, or 28 days). The term "preservative effective amount" refers to an amount of the preservative system which maintains the microorganism count below 1000, 100, or 10 cfu/g for at least 1, 4, 7, 10, 14, or 28 days.
The antimicrobial composition and preservative system may include a solvent, such as water and water miscible solvents, including, but not limited to, alcohols (e.g., methanol, ethanol, propanol, iso-propanol, and butanol), glycols (e.g. glycerin, diglycerin, butylene glycol, butoxydiglycol, propylene glycol, and dipropylene glycol), esters, ethers, polyethers, and any combination of any of the foregoing. For example, the solvent may comprise water and one or more glycol and/or one or more alcohol, such as glycerin, phenoxyethanol, benzyl alcohol, or ethanol. A specific solvent system comprises water and a glycol, such as glycerin. A second specific solvent system comprises water and an alcohol, such as ethanol.
Other adjuvants may be included in the antimicrobial composition and preservative system as known to one of ordinary skill in the art. Suitable adjuvants include, but are not limited to, preservatives; solubilizing agents; chelating agents, such as ethylenediaminetetraacetic acid (EDTA) and salts thereof and zeolites; surfactants, such as cationic, anionic, nonionic, and amphoteric surfactants; antioxidants, such as butylated hydroxyanisole (BHA) and butylhydroxytoluene (BHT); amine oxides; tertiary amines; zinc compounds; hydrotropes; fluoride compounds; magnesium salts; calcium salts; carboxylic acids; phosphates; phosphonates; formaldehyde donors; glycereth-7; myristyl myristate; glutaraldehydes; biguanides; natural products, such as geranoil, usnic acid, and tea tree oils; and any combination of any of the foregoing. Suitable preservatives include, but are not limited to, quaternary ammonium chlorides; quaternary ammonium carbonates; benzalkonium chloride; iodine containing compounds, such as 3-iodo-2-propynyl
butyl carbamate (IPBC); hydantoins, such as dimethylhydantoin and halogenated hydantoins; isothiazolinones; parabens, such as methylparaben, ethylparaben, and propylparaben; dehydroacetic acid and salts thereof; isocil; chloroxylenol; chlorhexidine; phenoxyethanol; benzyl alcohol; phenethyl alcohol; benzoic acid and salts thereof such as sodium benzoate; chlorobutanol; sorbic acid and salts thereof; triclosan; triclocarban; and any combination of any of the foregoing.
The antimicrobial composition and preservative system may be incorporated into an aqueous or oil based system or an emulsion. A suitable solvent for an oil based system is phenoxyethanol and/or benzyl alcohol.
In one embodiment, the antimicrobial composition is comprised of all natural products.
The antimicrobial composition can be a liquid or a solid.
When the synergistic mixture contains only two components (i.e., two of (a), (b), and (c)) from the list above, the weight ratio of the first component to the second component typically ranges from about 0.01 : 100 to about 100:0.01, preferably ranges from about 0.1 :20 to about 20:0.1, and more preferably ranges from about 1: 10 to about 10: 1. When the synergistic mixture contains three components, the third component can be in any amount, but typically the weight ratio of the third component to either of the first two components is from about 0.01 : 100 to about 100:0.01.
To prepare a formulation containing the product of the present invention, a concentrate of the antimicrobial composition and preservative system is generally first prepared. The concentrate may include from about 0.01 to about 100% by weight of the antimicrobial composition and preferably contains from about 5 to about 80% by weight of the antimicrobial composition, based upon 100% total weight of concentrate. For a two-component antimicrobial composition, the concentrate broadly contains from about 0.01 to about 99.99% by weight of the first component (e.g., component (a)) and from about 99.99% to about 0.01% by weight of the second component (i.e., component (b)) (based upon 100% total weight of concentrate). Table A illustrates the components and the ranges of components present in a typical
concentrate for the two-component antimicrobial mixtures (based upon 100% total weight of concentrate).
Table A
Table B illustrates the components and the ranges of components present in a typical concentrate for the three-component antimicrobial mixtures (based upon 100% total weight of concentrate).
Table B
Before use, the concentrate is diluted, preferably with the same solvent as was used in the concentrate, and/or incorporated into a product. Use dilutions of the composition typically comprise an antimicrobial, preservative, fungicidally, or bactericidally effective amount of the antimicrobial composition.
Generally, use dilutions contain from about 0.0001% or 0.01% to about 2% by weight of the concentrate. According to one preferred embodiment, use dilutions contain from about 0.1 to about 1% by weight of the concentrate. In more preferred embodiments, the use dilution contains 0.2, 0.25 or 0.30% by weight of the concentrate. The use dilution generally contains from about 0.01, to about 2.0% by weight of each antimicrobial ingredient, based upon 100% total weight of use dilution. According to a preferred embodiment, the antimicrobial composition
contains from about 0.001 to about 10%, preferably from about 0.01 to about 1%, and more preferably from about 0.05 to about 0.5% by weight of each antimicrobial ingredient (e.g., caprylic acid and/or lauric acid). Table C illustrates the components and generally the ranges of components present in the use dilution (based upon 100% total weight of use dilution) made from a two-component antimicrobial mixture.
Table C
Table D illustrates the components and generally the ranges of components present in the use dilution (based upon 100% total weight of use dilution) made from a three-component antimicrobial mixture.
Table D
In another embodiment, the use dilution includes from about 0.01 to about 1% by weight of component (a), and from about 0.01 to about 1% by weight of component (b). In yet another embodiment, the use dilution includes from about 0.05 to about 0.5% by weight of component (a), and from about 0.05 to about 0.5% by weight of component (b).
According to another embodiment, the aforementioned antimicrobial composition is incorporated into a product at a concentration of about 0.1 to about 1 or 2% by weight, based upon 100% total weight of product.
Another embodiment of the present invention is a method for inhibiting the growth of microorganisms, bacteria (e.g., S. aureus (ATCC #6538), P. aeruginosa (ATCC #9027), and E. coli (ATCC #8739)), and/or fungi (including plant and tree fungi) (e.g., Candida albicans, Aspergillus niger and Phytophthora ramrum) on a substrate by applying an antimicrobial, preservative, bactericidal, or fungicidal effective amount of the antimicrobial composition of the present invention to the substrate. The antimicrobial composition may be applied to the substrate by any method known in the art including, but not limited to, brushing, dipping, soaking, vacuum impregnation, and pressure treatment.
The antimicrobial composition of the present invention may be prepared by mixing the antimicrobial components, and optionally, solvents, and adjuvants. The mixture may be heated and/or stirred to expedite mixing.
Examples
Example 1
The solubility and stability of 20% and 25% lauric acid in glycereth 2-cocoate, 1,3-propanediol, caprylic acid, and certain mixtures of them was determined. The results are shown below.
Solvent Solubility of Solubility of
20% Laurie Acid 25% Laurie Acid
Glycereth 2- Cocoate Not Soluble Not Soluble
1,3 Propanediol Not Soluble Not Soluble
Caprylic acid Soluble/Stable Soluble/Stable
Caprylic acid + Soluble/Stable Soluble/Stable Glycereth 2- Cocoate
Caprylic acid + Soluble/Stable Soluble/Stable 1,3 Propanediol
Example 2
The following compounds and mixtures were added to a DEA/sulfate shampoo system to assess their ability to act as thickeners. The results are provided below.
All references, patent applications, and patents cited herein are hereby incorporated by reference.
Claims
1. An antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising:
(a) (i) two or more fatty acids, each of which is natural or naturally derived, or
(ii) a fatty acid and anisic acid, each of which is natural or naturally derived; and
(b) at least one of
(i) a natural or naturally derived product,
(ii) an alcoholic solvent, or
(iii) an organic acid or a salt thereof.
2. The antimicrobial composition of claim 1, wherein the composition is substantially free of parabens, formaldehyde donors, and isothiazolinones.
3. The antimicrobial composition of claim 1, wherein the composition is free of parabens.
4. The antimicrobial composition of any of the preceding claims, wherein the natural or naturally derived fatty acids are selected from lauric acid, caprylic acid, capric acid, palmitic acid, and any combination of any of the foregoing.
5. The antimicrobial composition of any of the preceding claims, wherein the natural or naturally derived product is selected from 1,3-propanediol (natural or naturally-derived), glycereth-2 cocoate, benzyl alcohol (naturally derived), glycerin, and any combination of any of the foregoing.
6. The antimicrobial composition of any of the preceding claims, wherein the natural or naturally derived product is 1,3-propanediol, which is natural or naturally-derived.
7. The antimicrobial composition of any of the preceding claims, wherein the alcoholic solvent is selected from ethylhexyl glycerin, phenoxyethanol, caprylyl glycols, pentylene glycol, hexylene glycol, and any combination of any of the foregoing.
8. The antimicrobial composition of any of the preceding claims, wherein the organic acid is selected from sorbic acid, benzoic acid, citric acid, and any combination of any of the foregoing.
9. The antimicrobial composition of any of the preceding claims, wherein the mixture comprises (a) lauric acid and caprylic acid, and (b) glycereth-2 cocoate or 1,3-propanediol.
10. An antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising:
(a) caprylic acid,
(b) at least one waxy fatty acid, each of which is natural or naturally derived, and
(c) at least one of
(i) a natural or naturally derived product,
(ii) an alcoholic solvent, or
(iii) an organic acid.
11. The antimicrobial composition of claim 10, wherein the caprylic acid is natural or naturally derived.
12. An antimicrobial composition consisting essentially of an
antimicrobial effective amount of a mixture consisting essentially of two or more fatty acids, each of which is natural or naturally derived.
13. The antimicrobial composition of claim 12, wherein the natural or naturally derived fatty acids are selected from lauric acid, caprylic acid, capric acid, palmitic acid, and any combination of any of the foregoing.
14. The antimicrobial composition of claim 12, wherein the mixture consists essentially of caprylic acid and lauric acid.
15. The antimicrobial composition of claim 12, wherein the mixture consists essentially of at least about 50% by weight of caprylic acid.
16. An antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising: (a) caprylic acid, which is natural or naturally derived,
(b) a natural or naturally derived product,
(c) an alcoholic solvent, and
(d) optionally, an organic acid or a salt thereof.
17. The antimicrobial composition of claim 16, wherein the mixture comprises caprylic acid, glycereth-2 cocoate, and ethylhexyl glycerin.
18. An antimicrobial composition comprising an antimicrobial effective amount of a mixture comprising:
(a) 1,3-propanediol (natural or naturally-derived),
(b) an alcoholic solvent, and
(c) optionally, an organic acid or a salt thereof.
19. The antimicrobial composition of claim 18, wherein the mixture comprises (a) 1,3-propanediol, which is natural or naturally-derived, (b) ethylhexyl glycerin, and (c) potassium sorbate or benzoic acid.
20. The antimicrobial composition of claim 18, wherein the mixture comprises 1,3-propanediol (natural or naturally-derived), natural benzyl alcohol, and optionally, caprylhydroxamic acid.
21. The antimicrobial composition of any of the preceding claims, wherein the mixture is present at a concentration of from about 0.01 to about 2% by weight, based on 100% total weight of the composition.
22. A method of killing and/or inhibiting the growth of microorganisms on a substrate comprising applying an effective amount of the antimicrobial composition of any of the preceding claims to the substrate.
23. The method of claim 22, wherein the microorganisms are selected from S. aureus, P. aeruginosa, E. coli, Candida albicans, Aspergillus niger and Phytophthora ramrum.
24. The method of claim 22 or 23, wherein the substrate is a product other than a foodstuff, pharmaceutical, or cosmetic.
25. A product other than a foodstuff, pharmaceutical, or cosmetic comprising a preservative effective amount of the antimicrobial composition of any of the preceding claims, wherein the product is substantially free of parabens.
26. The product of claim 25, wherein the product is a household, industrial, or institutional product.
27. The product of claim 25, wherein the product is a personal care product.
28. The product of claim 27, wherein the personal care product is a shampoo, body lotion, conditioner, or soap.
29. The product of claim 25, wherein the product comprises less than a smelling or coloring effective amount of the antimicrobial composition.
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US61/482,353 | 2011-05-04 |
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EP3473097A1 (en) | 2017-10-18 | 2019-04-24 | SCHÜLKE & MAYR GmbH | Liquid concentrate for preservation |
WO2023049981A1 (en) | 2021-10-01 | 2023-04-06 | Chemyunion Ltda. | Antisebogenic composition, formulation and use of the composition |
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