Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/13—Amines
  • A61K31/155—Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (N=C(OH)—NH2), isothiourea (—N=C(SH)—NH2)
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
  • A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
  • A61K47/14—Esters of carboxylic acids, e.g. fatty acid monoglycerides, medium-chain triglycerides, parabens or PEG fatty acid esters
• • 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
  • A61K8/37—Esters of carboxylic acids
  • A61K8/375—Esters of carboxylic acids the alcohol moiety containing more than one hydroxy group
• • 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
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/43—Guanidines
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/08—Solutions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/04—Antibacterial agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/10—General cosmetic use
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/30—Characterized by the absence of a particular group of ingredients
  • A61K2800/31—Anhydrous
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/52—Stabilizers
  • A61K2800/524—Preservatives

Definitions

• the present disclosure relates to chlorhexidine gluconate solubilized in a hydrophobic monoacylglyceride.
• the present disclosure also relates to compositions incorporating such material, as well as methods of preparing such materials.
• the present disclosure provides a composition comprising chlorhexidine gluconate solubilized in a monoacylglyceride having a hydrophilic-lipophilic balance of no greater than 10.
• the monoacylglyceride has a solubility parameter of greater than 10
• the monoacylglyceride has a binding energy to chlorhexidine gluconate of at least 25 kilocalories per mole. In some embodiments, the monoacylglyceride comprises vicinal hydrogen-bonding groups.
• the acyl group of the monoacylglyceride is a C8 to CI 8 acyl group, e.g., glycerol monocaprylate, glycerol monolaurate, glycerol monoisostearate, glycerol monooleate, and combinations thereof.
• the composition comprises no greater than 1 part by weight monoacylglyceride per 1 part by weight chlorhexidine gluconate. In some embodiments, the composition comprises no greater than 0.1 parts by weight water per 1 part by weight chlorhexidine gluconate.
• the present disclosure provides the composition further comprises a carrier.
• the carrier comprises one or more of a hydrophobic vehicle other than a monoacylglyceride, a polymer, and a solvent.
• the composition further comprises a thixotropic agent.
• Chlorhexidine digluconate commonly referred to as “chlorhexidine gluconate” or “CHG”
• CHG is an antimicrobial useful in various applications.
• CHG is often provided as an aqueous solution, in part because CHG may degrade in a non-aqueous composition.
• CHG has been provided in non-aqueous solutions by replacing water with a hydrophilic vehicle.
• U.S. Patent No. 6,458,341 (Rozzi et al., issued October 1, 2002) describes non-aqueous solutions containing CHG and a solubilizing glycol.
• a hydrophobic vehicle is one having a hydrophile/lipophile balance (“HLB”) of no greater than 10.
• HLB hydrophile/lipophile balance
• the compositions comprise at least 5% by weight CHG dissolved in the hydrophobic vehicle based on the combined weight of the CHG and hydrophobic vehicle. In some embodiments, the compositions comprise at least 10%, e.g., at least 15%, or even at least 20% by weight CHG dissolved in the hydrophobic vehicle based on the combined weight of the CHG and hydrophobic vehicle.
• the first method involves lyophilizing CHG, and then dissolving the CHG into the hydrophobic vehicle.
• the second method involves mixing an aqueous CHG solution with a relatively high boiling hydrophobic vehicle, and then pulling a vacuum on the mixture to remove the water.
• the third method involves generating the CHG in situ by reacting gluconolactone, a limited amount of water, and chlorhexidine free base.
• Each method is expected to give a similar final product, i.e., CHG dissolved in a hydrophobic vehicle, but each method has advantages and disadvantages.
• the lyophilization route does not require exposing the CHG to sustained heat, which helps prevent degradation.
• non-aqueous refers to compositions that may contain small amounts of water, e.g., less than 5 wt.%, based on the total weight of the composition. In some embodiments, the compositions contain less than 2 wt.%, e.g., less than 1 wt.%, or even less than 0.1 wt.% water, based on the total weight of the composition.
• the compositions contain little or no hydrophilic vehicle, i.e., vehicles having an HLB of greater than 10.
• water is considered a separate component independent of any hydrophilic vehicles; therefore, the following amounts are exclusive of any water which may be present in the composition.
• the compositions comprise no greater than 2 parts by weight hydrophilic vehicle per 1 part by weight CHG, e.g., no greater than 1 part by weight, no greater than 0.5 part by weight, or even no greater than 0.1 parts by weight hydrophilic vehicle per 1 part by weight CHG.
• compositions comprise no greater than 1 part by weight water per 1 part by weight CHG, e.g., no greater than 0.5 part by weight, no greater than 0.1 part by weight, or even no greater than 0.01 parts by weight water per 1 part by weight CHG.
• Hydrophobic vehicles have an HLB value of no greater than 10. In some embodiments, the hydrophobic vehicle has an HLB value of no greater than 9, e.g., no greater than 7. [0014] Generally, the hydrophobic vehicle is a monoacylglyceride, e.g., 1 -monoacylglycerides having the formula:
• proximate groups refer to groups separated by no more than three carbon atoms, e.g., the 2- monoacylglycerides of Formula II. In some embodiments, the proximate groups may be vicinal, i.e., separated by two carbon atoms, e.g., the 1 -monoacylglycerides of Formula I.
• the acyl group of the monoacylglyceride is a C8 to CI 8 acyl group.
• the R-group of the acyl group is linear. In some embodiments, the R-group is branched. In some embodiments, the R-group is saturated. In some embodiments, the R-group is unsaturated.
• monoacylglycerides are available as a mixture containing a range of acyl group chain lengths. Exemplary monoacylglycerides include, e.g., glycerol monocaprylate, glycerol monolaurate, glycerol monoisostearate, glycerol monooleate, and combinations thereof. Often such materials are commercially available as mixtures containing both the 1 -monoacylglyceride and the 2- monoacylglyceride.
• Table 1 Vehicles with ester groups providing good CHG solubility.
• HLB values were calculated using the method of Griffin (Griffin WC; J. Soc. of Cosmetic Chemists 5, 259 (1954)) (the "HLB Method”). In this method,
• E is the weight percent of oxyethylene content and P is the weight percent of polyhydric alcohol content (glycerol, sorbitol, etc).
• P polyhydric alcohol content
• glycerol segments with two hydroxyl groups, glycerol segments with one hydroxyl group, and hydroxyl-containing segments of any additional polyhydric molecules were included in the definition of P.
• HLB HLB
• Other methods of calculating HLB are available and may be required when determining the HLB value for compounds lacking both E and P groups, as defined above. While the calculated value of HLB may vary depending on the method used, the trends and relative hydrophobicity of materials are expected to be similar.
• Solubility Parameter Method Solubility parameters were computed via molecular dynamics simulations using the general procedures as described by Belmares et al. (Belmares, M.;
• Binding Energy Method Binding energies were computed using quench molecular dynamics simulations employing QEq charges (Rappe, A.K.; Goddard, W.A.; J. Phys. Chem. 95, 3358 (1991)) and the Dreiding Force Field (Mayo, S.L., Olafson, B.D., Goddard, W.A.; J. Phys. Chem. 94, 8897 (1990)) as implemented in Materials Studio Software (Materials Studio, Accelrys, Software Inc., 10188 Telesis Court, Suite 100, San Diego, CA 92121). Multiple independent simulations were carried out for each vehicle / CHG pair.
• HBN Hydrogen Bonding Number
• compositions may include a carrier in addition to the
• the carrier may comprise another hydrophobic vehicle.
• the carrier may comprise a polymer.
• the carrier may comprise a solvent.
• the carrier may comprise a thixotropic agent, i.e., an agent which renders the composition shear thinning.

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• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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• Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
• Detergent Compositions (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Cosmetics (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
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• 2013
  • 2013-08-27 CA CA2882964A patent/CA2882964A1/en not_active Abandoned
  • 2013-08-27 MX MX2015002542A patent/MX367220B/es active IP Right Grant
  • 2013-08-27 AU AU2013308992A patent/AU2013308992B2/en not_active Ceased
  • 2013-08-27 JP JP2015529929A patent/JP6158928B2/ja not_active Expired - Fee Related
  • 2013-08-27 CN CN201380045403.1A patent/CN104684536B/zh not_active Expired - Fee Related
  • 2013-08-27 US US14/424,198 patent/US20150238444A1/en not_active Abandoned
  • 2013-08-27 WO PCT/US2013/056802 patent/WO2014035971A2/en not_active Ceased
  • 2013-08-27 EP EP13759935.3A patent/EP2890362B1/en not_active Not-in-force
  • 2013-08-27 BR BR112015004178A patent/BR112015004178A2/pt active Search and Examination

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