Classifications

• • 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
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/8164—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers, e.g. poly (methyl vinyl ether-co-maleic anhydride)
• • 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
  • A01N37/18—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 containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues 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
  • A61K8/30—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
  • A61K8/42—Amides
• • 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
  • A61Q17/02—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 containing insect repellants

Definitions

• the present invention relates to fluid formulations containing the insect repellent agent DEET, and more particularly to emulsion formulations thereof .
• DEET N,N-Diethyl- ⁇ n-toluamide
• N,N-Diethyl-m-toluamide, water, a film-forming polymer and an emulsifier-emulsion stabilizer N,N-Diethyl-m-toluamide, water, a film-forming polymer and an emulsifier-emulsion stabilizer.
• the emulsion has commercially acceptable storage stability and a pleasing feel when applied to the skin
• DEET is commercially available in the form of a technical concentrate which contains at least about 95% DEET. The remaining 5% or less comprises moisture and isomers other than the meta-toluic isomer, which other isomers are considered to also have some insect repellent activity, plus small amounts of impurities which are artifacts of the manufacturing process employed.
• a recitation herein of DEET concentration shall ignore the other components of the concentrate: "10% DEET" shall indicate that a formulation contains 10% of a commercial technical concentrate .
• the emulsions of the present invention contain DEET, at about 5 to about 25 percent, together with water, a film-forming polymer and an emulsifier- emulsion stabilizer.
• a supplemental emulsifying agent may be useful as a formulation component .
• Suitable supplemental emulsifiers include, without limitation, the surfactants sorbitan stearate, stearic acid, sorbitan oleate, cetyl alcohol, glyceryl oleates, glyceryl stearates, sorbitan sesquioleate, DEA-cetyl phosphate, Oleth-20, PEG-8 distearate, PEG-8 oleate, PEG-2 stearate, Polysorbate 20, Polysorbate 60, Polysorbate 80, propylene glycol stearate, sodium laureth sulfate, sorbitan sesquioleate and many others known in the art.
• oil- in-water emulsions are prepared using emulsifiers having hydrophilic-lipophilic balance ("HLB") values about 8 to about 18.
• HLB hydrophilic-lipophilic balance
• Combinations of emulsifiers may be used, and frequently will be found to impart a greater emulsion stability than single emulsifiers. When combinations are used, all of the individual HLB values may not always be within the above range, but the overall HLB value usually will be. In general, when present, the emulsifier component will amount to about 0.1% to about 10% of the formulation.
• a film-forming polymer is present to provide a continuous film upon skin application and water resistance to the formulation.
• Water resistance may assist in obtaining an enhanced duration of action for the insect repellent agent. This would be particularly desirable for users participating in water-related activities, such as fishing, water skiing, swimming or activities which may incidentally involve water contact, or for users who are engaged in strenuous sports or work activities and perspire heavily.
• Useful film formers include: copolymers of octadecene and maleic anhydride; copolymers of 1-triacontane and vinyl pyrrolidone; acrylates/octylacrylamide copolymer; acrylates/PVP copolymer; acrylates/acrylamide copolymer; acrylates/VA copolymer; ethylene/maleic anhydride copolymer; polyisobutene; polyvinyl alcohol; PVP/eicosane copolymer; starch/acrylates/acrylamide copolymer; and hexanedioic acid polymers.
• Such ingredients will generally be present in a formulation in amounts about 0.1% to about 5%.
• an emulsifier- emulsion stabilizer such as an acrylates/C10-30 alkyl acrylate crosspolymer, carbomer, methyl vinyl ether/maleic anhydride copolymer or a triethanolamine salt of stearic acid.
• Suitable acrylates/C10-30 alkyl acrylate crosspolymer materials are commercially available from B.F. Goodrich Chemicals, Akron, Ohio under the trade names PEMULEN ® TR-1 and TR-2, or CARBOPOL ® .
• the concentration of emulsifier-emulsion stabilizer in the formulation will typically be about 0.01% to about 5%. In some formulations, it has been found that the concentration of the emulsion stabilizer PEMULEN TR-2 should not exceed about 0.8%, to avoid viscosity increases which adversely affect emulsion preparation and handling.
• emollients are commonly included in skin care products to enhance the feel of the material upon application, to treat dry skin conditions and/or to protect the formulation against microbial contamination.
• fragrances include emollients, fragrances, preservatives, vitamins, humectants, skin conditioners, antioxidants and others. Any of such materials may be included as desired, in addition to the required components.
• Sunscreening ingredients are also useful optional components of the formulations, when the user desires concomitant protection against excessive ultraviolet radiation exposure. Since the choice of sunscreen active agents is usually limited to those having governmental approvals, those skilled in the art will be aware of acceptable compounds. In the United
• Sunscreening ingredients will be used in sunscreen effective amounts as needed to provide a desired sun protection factor (SPF) , which may be measured using at least the essence of the procedure proposed to be established by the United States Food and Drug Administration as Title 21, Code of Federal Regulations, Part 352, Subpart D (Sections 352.70- 352.77), which proposal was published in the Federal Register on May 12, 1993 at pages 28298-28301. In general, up to about 30 percent sunscreens can be used.
• SPDF sun protection factor
• a storage-stable insect repellent lotion is prepared using the following ingredients: Name * Percent
• Vitamin E 0.10 Jojoba oil C 0.05
• the emulsion is prepared as follows: (1) all but a small portion of the water and the Pemulen TR-2 are mixed to form a clear solution and heated to about 60- 65°C; (2) components identified with a "B" above are sequentially added to the step 1 solution, with mixing to dissolve; (3) all components identified as "C” are mixed, except for the vitamin E, dimethicone and octadecene/maleic anhydride copolymer, to form a solution and heated to about 82-85°C; (4) the octadecene/maleic anhydride copolymer is added to the step 3 mixture, and dissolved; (5) the step 4 mixture is cooled to about 65-71°C and the remaining "C” components are added and dissolved; (6) the warm “D” component is added to the warm mixture from step 5 and dissolved; (7) the solution from step 6 is added to the solution from step 2, with sufficient agitation to form an emulsion, and mixing is continued until the emulsion cools to
• a storage- stable insect repellent lotion, containing sufficient sunscreen components to provide a waterproof sun protection factor (SPF) of 15, is prepared using the following ingredients and the general procedure of the preceding example :
• sunscreen active ingredients are added as "C" components.
• a storage-stable insect repellent lotion containing sufficient sunscreen components to provide a waterproof SPF of 30, is prepared using the following ingredients:
• Pemulen ® TR-2 A 0.30 Fragrance E 0.30 Imidazolidinyl urea F 0 . 20 Vitamin E acetate B 0 . 10 Aloe vera lipoquinone B 0 . 05 Jojoba oil B 0 . 05 Disodium EDTA A 0 . 01
• the emulsion is prepared as follows: (1) the components identified in the table with an "A" are mixed with all but a small portion of the water, while heating to about 49-55°C to form a solution; (2) the “B” components are mixed and heated to about 80-82°C, to form a solution; (3) to the step 2 solution are sequentially added the "C” components, with sufficient mixing after each addition to form a solution; (4) the step 3 solution is cooled to about 62-68°C; (5) the DEET is added to the step 4 solution and thoroughly mixed; (6) the solution of step 1 is agitated to form a vortex and the solution of step 5 is slowly added, to form an emulsion, then mixing is continued as the mixture cools to about 49-52°C; (7) the fragrance is added to the mixture from step 6 and mixing is continued as the batch cools to ambient temperature; (8) the "F” component is dissolved in the remaining water and added to the mixture of step 7; and (9) sufficient water is added, with mixing, to compensate for evaporative

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• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Pest Control & Pesticides (AREA)
• Plant Pathology (AREA)
• Birds (AREA)
• Epidemiology (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Dermatology (AREA)
• Agronomy & Crop Science (AREA)
• Dentistry (AREA)
• Engineering & Computer Science (AREA)
• Cosmetics (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

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• 1997
  • 1997-11-21 AR ARP970105476A patent/AR010303A1/es unknown
  • 1997-11-21 CO CO97068364A patent/CO4900083A1/es unknown
  • 1997-11-21 BR BR9713547-0A patent/BR9713547A/pt not_active IP Right Cessation
  • 1997-11-21 EP EP97949380A patent/EP0946092A1/en not_active Withdrawn
  • 1997-11-21 WO PCT/US1997/020358 patent/WO1998023150A1/en not_active Application Discontinuation
  • 1997-11-21 JP JP10524668A patent/JP2000505811A/ja active Pending
  • 1997-11-21 CA CA002271387A patent/CA2271387A1/en not_active Abandoned
  • 1997-11-21 AU AU74022/98A patent/AU730685B2/en not_active Ceased
  • 1997-11-21 NZ NZ335296A patent/NZ335296A/xx unknown
  • 1997-11-24 ZA ZA9710555A patent/ZA9710555B/xx unknown
  • 1997-12-09 TW TW086117553A patent/TW450806B/zh active

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