Classifications

• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
  • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
  • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
  • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
  • C23F11/182—Sulfur, boron or silicon containing compounds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/01—Deodorant compositions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K3/00—Materials not provided for elsewhere
  • C09K3/30—Materials not provided for elsewhere for aerosols

Definitions

• the present invention relates to household aerosol compositions using a compressed gas propellant that are free of hydrocarbon propellants, and particularly the use of such compositions with metal aerosol canister that are capable of corrosion.
• Examples of household aerosol products are air fresheners, car products, household products, fabric care, waxes, polishes, insecticides, ironing aids, fabric refreshers, and carpet cleaners.
• Tinplating protects the metal canisters against rapid corrosion, but tends itself to dissolve in aqueous based formulations.
• aerosol formulations containing less than 50 ppm of water corrosion of tinplated canisters is not generally a serious problem.
• water content of an aerosol product is more than 50 ppm (and particularly when greater than 150 ppm), problems due to corrosion are more likely to occur.
• VOC volatile organic content
• non-VOC propellant such as compressed gas (compressed gas referring to compressed air, compressed nitrogen or mixtures thereof) since this is of less impact to the environment, less expensive than VOC propellant and safer to handle from a manufacturing perspective as well as a consumer perspective due to the likely reduction in flammability.
• the common 'wet' (i.e. water rather than solvent based) air freshener aerosol compositions using VOC propellants typically contain nitrite as a corrosion inhibitor and sorbitan monooleate as an emulsifier to ensure uniform emulsification of water soluble and oily components such as water insoluble fragrance.
• the best recognised inhibitor system for tin-plated canisters is sodium nitrite and morpholine. Morpholine is a volatile base that helps to preserve the vapour phase in the aerosol containers and gives an alkaline pH to the formula. This system can involve the formation of nitrosamines that are very carcinogenic.
• sodium nitrite and morpholine are not generally able to prevent the dissolution of the tin coating, but to reduce the rate of dissolution of the tin coating to an acceptable level in VOC propellant systems.
• the amount of morpholine, sodium nitrite and thickness of tin plate are designed for around the required shelf life, for example two years.
• the dissolution of the tin plate to form a tin hydroxyl-oxide complex has been shown to have a negative effect on cleaning performances.
• the tin complex generally gives a pale yellow to an intense yellow colour when deposited, especially when sprayed onto a white surface.
• White fabrics or carpets can remain coloured by the liquids of aged aerosol products.
• Other considerations relate to certain stains like coffee, tea and wine that contain cationic metals. These metals can form brown coloured complex with tin hydroxyl-oxide complex, causing an evident negative effect of the cleaning formulation and its overall cleaning performance.
• an aerosol composition with compressed gas propellant that is free of hydrocarbon propellants, wherein the composition comprises:
• composition is an air freshening composition.
• the composition further comprises 0.00wt% to 0.5wt% sodium molybdate, and even more preferably comprises 0.0wt% to 0.1wt% sodium molybdate.
• the composition comprises:
• composition consists essentially of:
• the borate salt for use in the compositions of the present invention is preferably sodium borate, although other commercially available borate salts may be used either alone or in combination with sodium borate.
• the low MW alcohol for use in the compositions of the present invention is preferably ethanol, although other commercially available low MW alcohols may be used either alone or in combination with ethanol.
• an aerosol dispenser wherein the dispenser is a steel aerosol canister, tin-plated steel canister or other metal canister capable of corrosion and wherein the composition is an air freshener propelled, in use, by compressed gas propellant that is free of hydrocarbon propellants, the air freshener composition comprising:
• corrosion is understood in the context of the present invention to refer to the disintegration of an engineered material into its constituent atoms due to chemical reactions with its surroundings, in particular in the context of metal canisters corrosion means electrochemical oxidation of the metal canister in reaction with an oxidant such as oxygen.
• the dispenser is a steel aerosol canister or a tin-plate steel aerosol canister.
• the composition further comprises 0.00wt% to 0.5wt% sodium molybdate, and even more preferably comprises 0.0wt% to 0.1 wt% sodium molybdate.
• an anti-corrosion air freshening composition for use with a compressed gas propellant in a steel aerosol canister, tin-plated steel canister or other metal canister capable of corrosion wherein the composition comprises:
• the composition further comprises 0.00wt% to 0.5wt% sodium molybdate, and even more preferably comprises 0.0wt% to 0.1wt% sodium molybdate.
• the surfactant(s) used in the composition(s) of the present invention are preferably a non- ionic surfactant. More preferably the non-ionic surfactant(s) are ethoxylates of fatty alcohols, most preferably saturated C 8- 2o alcohols and the like, and most preferably saturated iso-C 13 alcohols such as those available from BASF under their LUTENSOL® brand of surfactants.
• the preservative(s) used in the composition(s) of the present invention are preferably formed from lox toxicity biocides suitable for use in water-based canister systems such as
• a fourth aspect of the present invention there is provided a method of preventing corrosion of a metal aerosol canister capable of corrosion wherein the method involves the step of introducing a composition according to the first or third aspect of the present invention into said aerosol container along with a compressed gas propellant that is free of hydrocarbon propellants.
• Example 1 Two example formulations were prepared as set out below.
• Example 1 Two example formulations were prepared as set out below.
• wt% of the composition adds up to exactly 100wt%.
• Each sample was then loaded into a tin-plated steel aerosol canister having a 15 bar pressure rating and filled with compressed air until the internal pressure within the canister reached 9.0 bar @ 20°C.
• Samples of examples 1 & 2 were then held in a secure storage container at respective constant temperatures of 20°C, 30°C and 40°C for a period of 10 weeks and then tested for spray performance and, once exhausted, corrosion. All samples of examples 1 & 2 at all temperatures showed no signs of impairment after the storage, they all sprayed within consumer acceptable spray performance parameters and no canisters showed any signs of corrosion therein.

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• Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Dispersion Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Preventing Corrosion Or Incrustation Of Metals (AREA)
• Medicinal Preparation (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Cosmetics (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2010
  • 2010-05-07 GB GB1007660.2A patent/GB2480103B/en active Active
• 2011
  • 2011-05-09 US US13/643,601 patent/US20130090283A1/en not_active Abandoned
  • 2011-05-09 RU RU2012152655/15A patent/RU2012152655A/ru unknown
  • 2011-05-09 EP EP11720840A patent/EP2566525A1/en not_active Withdrawn
  • 2011-05-09 AU AU2011101757A patent/AU2011101757A4/en not_active Expired
  • 2011-05-09 BR BR112012028456A patent/BR112012028456A2/pt not_active IP Right Cessation
  • 2011-05-09 KR KR1020127031748A patent/KR20130101445A/ko not_active Application Discontinuation
  • 2011-05-09 MX MX2012012968A patent/MX2012012968A/es not_active Application Discontinuation
  • 2011-05-09 WO PCT/GB2011/050886 patent/WO2011138620A1/en active Application Filing
  • 2011-05-09 CA CA2797339A patent/CA2797339A1/en not_active Abandoned
• 2012
  • 2012-10-29 ZA ZA2012/08127A patent/ZA201208127B/en unknown

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