Classifications

• • 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
  • A61Q19/10—Washing or bathing preparations
• • 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
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
• • 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
  • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
  • A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
  • A61K47/38—Cellulose; Derivatives thereof
• • 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
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
  • A61K8/731—Cellulose; Quaternized cellulose derivatives
• • 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
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0014—Skin, i.e. galenical aspects of topical compositions
• • 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
  • 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
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/02—Preparations for cleaning the hair
• • 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
  • A61Q5/12—Preparations containing hair conditioners
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
  • C08L1/08—Cellulose derivatives
  • C08L1/26—Cellulose ethers
  • C08L1/28—Alkyl ethers
  • C08L1/284—Alkyl ethers with hydroxylated hydrocarbon radicals
• • 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
  • C11D3/22—Carbohydrates or derivatives thereof
  • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
  • C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

Definitions

• the present invention is related to a polysaccharide composition and more particularly, to hydroxyethylcellulose compositions which when applied in water are capable of exceptional dispersion, minimum lump formation and very quick hydration to reach maximum desired viscosity.
• the invention concerns use of hydroxyethylcellulose compositions in consumer products, in particular, pharmaceutical, personal care (excluding oral care compositions), as well as household care applications.
• Dissolution is a loosely used term. In this case, dissolution is used to represent the two steps by which polymers go into aqueous solutions. In the first step, the polymer is dispersed into the aqueous solution. The time it takes the polymer to disperse is subject to a good deal of variability. Dispersion could be as short as few seconds or as long as several hours depending on technique, instrumentation, morphology and surface chemistry of the polymer. After the polymer is dispersed, the polymer undergoes a hydration step.
• US Patent No. 5,869,029 discloses compositions comprising water-soluble or water-swellable polymers agglomerated by treatment with polyols, and the use of these compositions in making toothpastes.
• the polyols of use in this composition are selected from the group consisting of sugar alcohols, glycerol, polyethylene glycol, propylene glycol, and mixtures thereof. This composition is of utility for producing toothpaste formulations.
• US Patent No. 6,258,342 discloses the use of water or aqueous polymers agglomerated water-soluble or water-swellable polymer in oral care compositions.
• the oral care composition or dentifrice described in this patent contains abrasives, humectants, and water-soluble polymers.
• HEC hydroxyethylcellulose products
• HMHEC hydrophobically modified hydroxyethylcellulose products
• Glyoxal-free easily dispersable polymers offer an opportunity of easily incorporating these materials into consumer product formulations for use in personal care and, household care applications where there are concerns regarding the presence of glyoxal in the formulations.
• the present invention relates to a composition of agglomerated hydroxyethylcellulose wherein a cellulose ether, more particularly a hydroxyethylcellulose, is used as an agglomerating agent.
• This invention further is directed to the process for preparing the agglomerated hydroxyethylcellulose compositions mentioned above.
• This invention is further directed to functional use of agglomerated hydroxyethylcellulose compositions in consumer products such as pharmaceutical, household care and personal care (excluding oral care) compositions.
• the consumer product comprising a) an agglomerated hydroxyethylcellulose composition, b) a consumer product active ingredient material, and c) water, wherein the agglomerated hydroxethylcellulose composition comprises a particulate hydroxyethylcellulose and a low molecular weight hydroxyethylcellulose composition.
• Figures 1 and 2 each contain a plot of the viscosity in centipoise (cps) over time, as measured using a Haake Model VT501 viscometer, as well as a plot of the percentage viscosity at given time based on the final viscosity of Comparative Example 1.
• Figures 3 and 4 each contain plots of the viscosity in centipoise (cps) over time, as measured using a Haake Model VT501 viscometer, as well as plots of the percentage viscosity at given time based on the final viscosity of Comparative Example 2.
• Figure 4 contains duplicate tests.
• Figures 5 and 6 each contain plots of the viscosity in centipoise (cps) over time, as measured using a Haake Model VT501 viscometer, as well as plots of the percentage viscosity at given time based on the final viscosity of Example 1. Both Figures 5 and 6 contain duplicate tests.
• HEC hydroxyethylcellulose products
• HHEC hydrophobically modified hydroxyethylcellulose products
• Polysurf ® 67 HMHEC available from Hercules Incorporated
• Glyoxal-free easily dispersable polymers offer an opportunity to easily incorporate these materials into consumer products such as personal care (excluding oral care compositions), pharmaceutical or household care uses.
• Agglomeration is defined herein as the aggregation of individual particles resulting in an increase in the particle size of the particulate material.
• Agglomerated HEC material of use in the present invention may be made by the process of agglomerating as described in US Patent No. 6,258,342, incorporated herein by reference in its entirety.
• Agglomerated HEC material of use in the present invention may be prepared by spraying a particulate HEC with an aqueous solution of HEC, preferably a low molecular weight HEC.
• the low molecular weigh being defined as a HEC with a lower molecular weight than the particulate HEC.
• a preferred low molecular weight HEC is exhibits a viscosity in a 2% aqueous solution of less than approximately 350 cps, preferably approximately 15 cps.
• Commercially available fluidized bed spray units may be employed for this agglomeration operation.
• HEC agglomerated HEC material of use in the invention
• the HEC was agglomerated with 5% of a low molecular weight HEC (low viscosity HEC aqueous solution (Natrosol® L HEC available from Hercules Incorporated)) in a fluid bed dryer.
• a sieved sample of the agglomerated HEC composition in particle size range 400-800 micron was tested.
• the consumer product of the present invention comprise an agglomerated HEC composition, a consumer product active ingredient material, and an amount of water.
• Examples of the consumer product active ingredient materials include sun ray (UV) absorbers, sun screen agents, moisturizers, humectants, benefiting agents for hair, skin, nails, depositing agents such as surfactants and polysaccharide polymers, occlusive agents, moisture barriers, lubricants, emollients, anti-aging agents, antistatic agents, abrasive, antimicrobial agents, insect repellent agents, drug delivery agents, secondary conditioners, exfoliants, lustering agents, tanning agents, luminescent, colors, anti-odorizing agents, fragrances, viscosifying agents, salts, lipids, phospholipids, hydrophobic plant extracts, vitamins, foam stabilizers, pH modifiers, preservatives, suspending agents, silicone oils, silicone derivatives, essential oils, oils, fats, fatty acids, fatty acid esters, fatty alcohols, waxes, polyols, hydrocarbons, dust collectors, polishing agents, stain removing agents, anti- redeposition agents,
• the dispersions were mixed either for one (1) hour or two (2) hours and viscosity was measured as a function of time, Figures 1 to 6.
• the plots provide viscosity with time as measured by Haake viscometer and also %viscosity at given time based on the final viscosity.
• Natrosol® 250HHX-GF HEC (glyoxal-free), HEC agglomerated with 5% of a low viscosity HEC aqueous solution (Natrosol® L HEC available from Hercules Incorporated) in a fluid bed dryer.
• Example 2 No lumping was observed when Example 2 (Natrosol® HHX-GF HEC agglomerated with 5% of a low viscosity HEC aqueous solution (Natrosol® L hydroxyethyl cellulose available from Hercules Incorporated) in a fluid bed dryer) was first added to the deionized water.
• Example 4 Severe large lumping occurred with Comparative Example 4 (Natrosol® 250HX Pharm HEC, available from Hercules Incorporated.) The lump did not dissolve even after two (2) hours of mixing.
• Comparative Example 4 (Natrosol® 250HX Pharm HEC); - Fine powder, lumpy (not free-flowing) in its container;
• Example 5 (Natrosol® 250HHX Pharm HEC) - Fine granular material, no caking, dry free-flowing; and Example 2 (Natrosol® HHX-GF HEC) - Coarse granular, dry free-flowing.
• composition of agglomerated hydroxyethylcellulose of use in this invention - agglomerated HEC, Natrosol® 250HHX-GF - provided excellent dispersion & dissolution without the lumping issue experienced by Comparative Examples 4 & 5, the Pharm grade products.
• Example 3 Dispersible Natrosol® 250HHX-GF HEC agglomerated with 5% of a low viscosity HEC aqueous solution (Natrosol® L hydroxyethyl cellulose available from Hercules Incorporated) in a fluid bed dryer;
• a low viscosity HEC aqueous solution Naatrosol® L hydroxyethyl cellulose available from Hercules Incorporated
• Example 3 Dispersible Natrosol 250HHX-GF, 1.68% moisture; (Comparative Example 4) Natrosol® 250HX-Pharm HEC, 3.43% moisture; (Comparative Example 4) Natrosol® 250HX-Pharm HEC, 3.88% moisture; (Comparative Example 5) Natrosol® 250HHX-Pharm HEC 1 3.26% moisture; and (Comparative Example 1) Natrosol®250HHR-CS HEC, 4.61% moisture.
• Cetyl alcohol Crodacol C95NF from Croda
• a hair conditioner was produced with the following proportions:
• the agglomerated HEC of Example 3 was added into vortex of water and mixed until fully dissolved. Next, the solution was heated to 65°C in a water-bath. Next cetyl alcohol was added and mixed until homogeneously mixed. The solution was then cooled to 50 0 C and potassium chloride was added while mixing. Next, isopropyl myristate was added to the solution and mixed until homogeneous, producing a conditioner.
• the pH of the conditioner was adjusted between 5.25 to 5.5 with 5% citric acid and/or 5% sodium hydroxide solution.
• the final conditioner product was observed to be smooth and free of any gels.
• the final viscosity of the conditioner product was 9,600 cps.
• Example 4 conditioner product was repeated by replacing agglomerated HEC of Example 3 with Comparative Example 5. It was observed that the final comparative conditioner product had few gels. The final comparative conditioner product viscosity was not measured due to gels. [00047] The comparative conditioner product was repeated by replacing agglomerated HEC of Example 3 with Comparative Example 1. The conditioner had few small gels. The final comparative conditioner product viscosity was 9,000 cps.
• Glycerin USP grade from Spectrum
• Glycol stearate Kessco® EGMS from Stepan
• Acetylated lanolin Lipolan® 98, Lipo Chemicals
• Cetyl alcohol Crodacol® C95, Croda lnc
• a skin lotion was produced with the following proportions:
• a skin lotion was produced using the following procedure: The ingredients of Part Il were mixed in a beaker and heated to 80 0 C. In a separate beaker, the ingredients of Part I were mixed and heated to 80 0 C. Next, the mixture of Part I was added to the mixture of Part Il while mixing. In a separate third beaker, ingredients of Part III were mixed and then added to the mixture of Part I and Il while mixing at 80 0 C. Next, the agglomerated HEC of Example 3 was added to the vortex of the mixture consisting of Part I, Il and III. Mixing was continued for about 10 minutes and then the mixture was permitted to cool to 40 0 C. When the mixture cooled to 40 0 C, the pH of the emulsion was adjusted to 6.0 to 6.5. Next, the preservative was added and the mixture was permitted to cool further to room temperature while mixing resulting in a final skin lotion.
• the final skin lotion was observed to be smooth and free of any gels.
• the final viscosity of the skin lotion was 13400 cps.
• the procedure for producing the skin lotion of Example 5 was repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 5. Some lumping occurred initially when the glyoxal treated HEC of Comparative Example 5 was added to the mixture consisting of Part I 1 Il and III, and the glyoxal treated HEC of Comparative Example 5 was observed to take a longer time to solublize when compared to the agglomerated HEC of Example 3 of use in the present invention. The resultant comparative skin lotion was free of any gels. The final viscosity of the comparative skin lotion was 18,600 cps.
• Example 5 For comparative purposes, the procedure for producing the skin lotion of Example 5 was again repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 1. In the comparative skin lotion, it was observed that a sufficient amount of heat was essential to dissolve the glyoxal treated HEC of Comparative Example 1 otherwise a longer mixing time was required when compared to the agglomerated HEC of Example 3. The resultant comparative skin lotion was observed to be smooth. The final viscosity of the comparative skin lotion was 10,600 cps.
• Example 6 Conditioning Shampoo
• Cationic guar N-Hance® 3205, Cationic guar from Aqualon Silicone emulsion: Dow Corning 1784 from Dow Corning Preservative: DMDM Hydantoin, Glydant® from Lonza
• a conditioning shampoo was produced with the following proportions:
• a conditioning shampoo was produced using the following procedure: Cationic guar was added to vortex of water. The cationic guar was mixed for 30 minutes. Next, agglomerated HEC of Example 3 was added to the cationic guar mixture and mixed for an additional 30 minutes. Next, the remaining ingredients from the above list were added to the mixture in the order listed. Between each subsequent addition, the mixture was allowed to mix for until it appeared to be homogeneous. A longer mixing time was required after the addition of sodium laureth sulfate. The pH of the final conditioning shampoo was adjusted to 5.0 to 5.5 with citric acid. The final conditioning shampoo was observed to be smooth, opaque and free of any gels. The final conditioning shampoo had a viscosity of about 8500 cps.
• Example 6 For comparative purposes, the procedure for producing the conditioning shampoo of Example 6 was repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 5.
• the final comparative conditioning shampoo had large few gels.
• the viscosity of the final comparative conditioning shampoo 15,800cps.
• Example 6 For comparative purposes, the procedure for producing the conditioning shampoo of Example 6 was again repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 1.
• the Comparative Example 1 HEC polymer did not dissolve initially as the agglomerated HEC of Example 3 did.
• the final comparative conditioning shampoo was observed to be stable, opaque and having a viscosity of 7500 cps.
• a shampoo was produced with the following proportions:
• a shampoo was produced using the following procedure: The ingredients were added in the order listed to vortex of water. After each addition, the solution was mixed for homogeneous mixing of ingredients. The final shampoo was smooth, slightly hazy and free of any gels. The final shampoo viscosity was about 6,000 cps.
• the procedure for producing the shampoo of Example 7 was repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 5.
• the glyoxal treated HEC of Comparative Example 5 took longer time to dissolve than the agglomerated HEC of Example 3 with some lumping initially observed.
• the final comparative shampoo was smooth, slightly hazy and free of any gels.
• the final viscosity of the comparative shampoo was about 6,000 cps.
• Example 7 For comparative purposes, the procedure for producing the shampoo of Example 7 was again repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 1.
• the glyoxal treated HEC of Comparative Example 1 did not dissolve initially as the agglomerated HEC of Example 3 did.
• the final comparative shampoo was observed to be slightly grainy in texture, slightly hazy and free of any gels.
• the final viscosity of the comparative shampoo was about 5,900 cps.
• SLES Steol® CS330 from Stepan Cocoamidopropyl betaine (CAPB): Amphosol® CA from Stepan Cationic guar: AquaCat® CG available from Hercules Incorporated Methyl Gluceth 20: Glucam® E20 from Noveon Preservative: Glydant® from Lonza
• a Body Wash was produced with the following proportions:
• a Body Wash was produced using the following procedure: The agglomerated HEC of Example 3 was added to the vortex of water created by the stirrer. Next, the remaining ingredients were added in the order listed above to vortex of solution allowing time for homogeneous mixing between each subsequent addition. The final Body Wash pH was adjusted 5.0 to 6.0 with citric acid. The final Body Wash was observed to be smooth, slightly hazy and free of any gels. The final Body Wash viscosity was about 6,200 cps.
• Example 8 For comparative purposes, the procedure for producing the Body Wash of Example 8 was repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 5. The glyoxal treated HEC of Comparative Example 5 did not fully dissolve initially. The final comparative Body Wash was observed to be smooth, slightly hazy and free of any gels. The final comparative Body Wash viscosity was about 6,800 cps.
• Example 8 For comparative purposes, the procedure for producing Body Wash of Example 8 was again repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 1. The glyoxal treated HEC of Comparative Example 1 did not dissolve initially as the agglomerated HEC of Example 3 did. The final comparative Body Wash was observed to be slightly grainy, slightly hazy and free of any gels. The final comparative Body Wash viscosity was about 5,000 cps.
• the ingredients were added in the order listed to the vortex of water created by the stirrer allowing time for homogeneous mixing between each addition.
• the final shampoo pH was adjusted 5.0 to 6.0 with citric acid.
• the final shampoo was observed to be smooth, slightly hazy and free of any gels.
• the viscosity of the final shampoo was about 6,100 cps.
• Example 9 For comparative purposes, the procedure for producing the shampoo of Example 9 was repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 5. The glyoxal treated HEC of Comparative Example 5 did not fully dissolve. The final comparative shampoo had gel layer. The viscosity of the final comparative shampoo was about 7,200 cps.
• Example 9 For comparative purposes, the procedure for producing the shampoo of Example 9 was again repeated by replacing the agglomerated HEC of Example 3 with the glyoxal treated HEC of Comparative Example 1. The glyoxal treated HEC of Comparative Example 1 did not dissolve. The final comparative shampoo had gel layer. The viscosity of the final comparative shampoo was not measured due to the gel layer.
• Example 10 demonstrates that the agglomerated HEC of Example 3 may be added into a shampoo to make a stable shampoo product while the comparative glyoxal treated HECs of Comparative Examples 1 & 5 do not result in stable shampoo products when post added to a shampoo product.
• a Floor Cleaner was produced with the following proportions:
• Part II 241.5g Part Il [00077] A Floor Cleaner was produced using the following procedure: Ingredients of Part I were combined in the order listed above and mixed about 10 minutes in between each addition.
• Part III (Combined Part 1 and Part 2).
• the floor cleaner concentrate (Part I) was added to the Agglomerated HEC of Example 3 solution (Part II).
• the solution was mixed for about 15 minutes to produce the final Floor Cleaner.
• the final viscosity of the Floor Cleaner was 4760 cps and its pH was 9.16.
• the finished Floor Cleaner appeared clear yellow.
• a control example of the Floor Cleaner of Example 10 was produced without the addition of the Agglomerated HEC of Example 3.
• This comparative Floor Cleaner material had a viscosity of only 350 cps.
• a Dish Washing Liquid was produced with the following proportions
• a Dish Washing Liquid was produced using the following procedure. Agglomerated HEC of Example 3 was added to deionized water while mixing. This solution was allowed to mix for about 15 minutes. Next, DMDM Hydantoin was added to the solution and this solution was permitted to mix for approximately an additional 5 minutes. The rest of ingredients in the order they appear in the above list with continuous stirring. After each ingredient addition, the resultant solution was permitted to be mixed for about 10 minutes or until homogeneous, prior to the addition of the next ingredient. Upon completion, the pH of final Dish Washing Liquid was adjusted with citric acid to 7.6.
• the final Dish Washing Liquid had a viscosity of 99 cps. Its pH was 7.55, and it had a clear appearance.
• Example 11 A control example of the Dish Washing Liquid of Example 11 was produced without the addition of the Agglomerated HEC of Example 3. This comparative Dish Washing Liquid material had a viscosity of only 30cps, and it had a clear appearance.

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