Classifications

• • 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
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3947—Liquid compositions
• • 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
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
  • C11D17/0017—Multi-phase liquid compositions
  • C11D17/0021—Aqueous microemulsions
• • 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
  • C11D3/2075—Carboxylic acids-salts thereof
• • 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
  • C11D3/2093—Esters; Carbonates
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/29—Sulfates of polyoxyalkylene ethers
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/662—Carbohydrates or derivatives
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols

Definitions

• the present invention is in the field of detergent compositions; in particular high active liquid detergent compositions, for use in laundry and/or household cleaning amongst others.
• the compositions of the present invention relate to the field of micro-emulsions, in particular water-in-oil micro-emulsions.
• Liquid detergent compositions are widely appreciated and preferred by many modern day consumers in both developed and developing and emerging markets. Such liquid detergent compositions are primarily used in Laundry and household care applications.
• Liquid detergent compositions are widely known in the art. Liquid detergent compositions are widely known in the art. Liquid detergent
• compositions generally comprise a surfactant active and a solvent.
• Liquid detergent compositions may further comprise perfume, builder, polymers, bleach, thickeners, fluorescers, and other common detergent ingredients.
• Liquid detergent compositions are often structured, e.g. to control the viscosity of the liquid or to improve stability and prevent phase separation or to be able to incorporate ingredients that are water insoluble.
• Present day liquid detergent compositions typically do not contain bleach and therefore do not work well on bleachable stains, such as coffee, tea, tomato and wine.
• a stable liquid detergent composition is a detergent composition in the form of an emulsion.
• a defined kind of emulsion is the micro-emulsion.
• emulsions are opaque liquids which are not appreciated by modern day consumers.
• Micro-emulsions can be made transparent and typically have a lower viscosity too.
• WO95/27034 discloses detergent compositions in the form of oil in water micro- emulsions providing rapid stain removal.
• the composition of WO95/27034 comprises a surfactant system comprising short chain length non-ionic alcohol ethoxylates having less than 12 carbon atoms and with at least 45% of C10 material. It is found that these oil in water micro-emulsions do not provide adequate dissolution of fatty stains and soils when applied neat. Fast fat (or oily soil) solubilisation when applied neat onto a fatty stain or soil remains to be desired for amongst other the dissolution of sebum on shirt collars and fatty soils on hard surfaces.
• Micro-emulsions have also been disclosed in a number of other documents such as US 5,415,812, which discloses a light duty detergent composition; or US 4,438,009, which discloses low solvent laundry pre-treatment compositions.
• EP-A2-610 010 bleach containing micro emulsions have been disclosed, however, this disclosure relates to an o/w (oil in water) microemulsion.
• the continuous phase is aqueous, it's efficacy in solubilising fatty solids leaves to be desired.
• laundry pre-treatment compositions have been proposed, mostly in the field of laundry and fabric cleaning, for providing stain removal.
• laundry pre-treatment compositions are disclosed in the form of micro- emulsions. It discloses mixtures of polyamines and grease cutting solvents.
• surfactants such as non-ionic surfactants are also disclosed. What remains to be desired is a liquid detergent composition that removes soils and/or stains of solid or solidified fatty material in the main wash at neutral pH.
• a water-in-oil micro-emulsion detergent composition comprising a hard water tolerant surfactant, water, oil and phtaloyl amino
• PAP provides a concentrated liquid bleaching detergent composition that removes soils and/or stains of solid or solidified fatty material in the main wash at neutral pH.
• the present invention provides a water-in-oil micro-emulsion detergent composition
• a surfactants system comprising 20-75% by weight of a surfactants system; 5-20% by weight of an aqueous solution having an ionic strength of 0.01 - 4 mol/L comprising: water; and an electrolyte, excluding surfactant system (a); 10-40 % by weight of a saturated oil; and 0.1-10% by weight of phtaloyl-amino-peroxycaproic acid (PAP); and wherein the composition comprises less than 100 ppb of transition metal ions, and wherein the pH is between 4 and 8.
• a surfactant system a
• PAP phtaloyl-amino-peroxycaproic acid
• the invention provides a process for preparing a micro-emulsion according to any one of claims 1 to 9 comprising the steps in sequence of: adding in the surfactant system to a oil/solvent, mixing them together by an overhead stirrer, adding the PAP and mixing again; adding optional hydrophobic ingredients, and adding aqueous phase containing electrolytes.
• the invention relates to water-in-oil (w/o) micro-emulsion detergent composition.
• Water-in-oil micro-emulsion detergent composition w/o
• a water-in-oil micro-emulsion has a configuration comprising discrete droplets of water in oil.
• These w/o microemulsions are also characterised by a low electrical conductivity values, preferably ⁇ 1 mS/cm, more preferably ⁇ 0.1 mS/cm, (e.g. measured with a conductivity meter; (e.g. Orion 150)).
• the water volume fraction in the microemulsion is typically ⁇ 0.2, to avoid percolation of water droplets leading to a higher electrical conductivity of the sample.
• Typical water droplet diameters are in the range of 2 - 50 nm (e.g. measured by dynamic light scattering technique by a
• Brookhaven goniometer system equipped with a laser and photo detector and an auto- correlator.
• the viscosity is in the range of 30 - 300 CP (measured at 20 sec " using a controlled stress rheometer, CSL 500 TA Instruments).
• compositions according to the invention typically comprise 20 to 75% by weight of the composition of a surfactant.
• Hard water tolerant surfactants such as alkyl ether sulphates (e.g. SLES), Alkyl polyether carboxylates, esters and amides of fatty acids, alkane sulphonates,
• Polyoxyalkylene phosphate esters phosphated and polyphosphated alcohols, sulfosuccinates (di-2-ethylhexyl sulfosuccinates) alkoxylated non-ionic surfactants (e.g., lauryl alcohol ethoxymers), EO/PO block copolymers, Alkyl polyglucosides
• APGs Alkyl N-methyl glucamides
• Amine oxides Amine ethoxylates, Methyl ester ethoxylates, alkanol amides, Amidopropyl amines, carboxybetaines, Sulfo- and phosphor-betaines, Aminoethylethanolamine-derived amphoterics (alkyl
• amphomonopropionates amphomonopropionates
• the most preferred hard water tolerant surfactants are alkoxylated non-ionic surfactants, Alkyl ether sulfates, Alkyl polyglucosides and mixtures thereof.
• the surfactant is preferably present in a concentration of at least 30%, more preferably at least 40%, still more preferably at least 50%, or even at least 60% by weight of the composition.
• the surfactant is preferably present in a concentration of not more than less than 70% by weight of the composition.
• anionic and non-ionic surfactants are most preferred, while any surfactant may be used in household cleaning compositions.
• the linear or branched alkoxylated fatty alcohol having a carbon chain of between 10 and 16 carbon atoms are preferred in the composition.
• the fatty alcohol is preferably ethoxylated, having an average of between 0 and 7 EO groups.
• anionic and non-ionic surfactants are the most preferred.
• hard surface spray cleaner any surfactant may be used.
• High active compositions even preferably comprise at least 50% by weight, more preferably at least 60% by weight or even at least 70% by weight of the surfactant system.
• Other liquid laundry or fabric cleaning compositions, fabric conditioning compositions and household cleaning compositions typically comprise not more than 75% by weight, more preferably not more than 70% by weight, still more preferably not more than 60% by weight, or even not more than 50% by weight.
• the composition comprises 5-20% by weight of an aqueous solution, having an ionic strength of from 0.01 to 4 mol/l, preferably at least 0.05 mol/l, preferably at least 0.1 mol/l, preferably at least 0.2 mol/l, or even at least 0.5 mol/l, but preferably not more than 3.5 mol/l, or even not more than 3 mol/l.
• the aqueous composition comprises water and an electrolyte for improved
• the electrolyte is typically present in the composition in such a concentration that the ionic strength is in the above given range. Typically the electrolyte is present in a concentration of up to 15 % by weight based on the aqueous solution, when the electrolyte is a mono-valent electrolyte salt. The required amount is dependent on the type of electrolyte used and its valance.
• the electrolyte requirement follows the Schulze-Hardy rule for colloidal solutions, which defines the amount needed on the bases of the required concentration of a monovalent cation divided by the (valence) 6 ; for example, when 15% of Na 2 S0 4 would be required to form a micro- emulsion, it could be replaced by CaS0 4 in a concentration of about
• monovalent cationic salt are preferably present in a concentration of between 1 and 15% based on the aqueous solution, while divalent cationic salt are preferably present in a concentration of between 0.01 and 4% based on the aqueous solution, and trivalent and multivalent cationic salt are preferably present in a concentration of between 0.005 and 2% based on the aqueous solution.
• Preferred electrolytes are phosphates, sulphates of alkali metal and alkaline earth metals mixtures of any of the above.
• Preferred trivalent metal cation is Al 3+ .
• transition metal cations are excluded as they are detrimental to bleach stability.
• the composition further comprises 10 to 40% by weight of a saturated oil.
• the oil is a saturated, linear, branched or cyclic hydrocarbon with MP >-100 °C , selected from the following class of chemicals: (i) esters; (ii) acids and (iii) triglycerides and (iv) alkanes.
• the oil preferably has a Hansen solubility of between 14 and 20 (MPa) 0 5 .
• the Hansen solubility is preferably at least 15 (MPa) 0 5 , more preferably at least 16 (MPa) 0 5 , and typically not more than 19 (MPa) 0 5 or even not more than 18 (MPa) 0 5 .
• the oil preferably has a solubility of solid triglyceride fatty matter into the oil and/or solvent of more than 3% by weight.
• the solubility of solid trilaurin (a triglyceride) fatty matter into the oil is more than 5%, or even more than 10%. This percentage is based on the aggregate amount of the oil and the trilaurin dissolved therein.
• the oil is preferably selected from alkyl-, aryl- esters of saturated fatty acids, saturated fatty acid oils, mono- di- and tri-glycerides without any unsaturations, sugar derived polyesters and sucrose polyesters.
• Preferred fatty acids are C8-22 fatty acids and including di- and tri-carboxylic acids and oligomeric fatty acids (such as commercially available as Pripol 1017 ex. Unichema).
• Preferred triglycerides include those of medium chain glycerides, which are liquid at ambient conditions are also contemplated. It is especially preferred to use oils from renewable sources, such as oil derived from palms, soy, coconut and jatropha.
• the bleach according to the invention is phtaloyl-amino-peroxycaproic acid (also referred to in literature as N-N-phtaloyl-amino-peroxycaproic acid, phthalimido perhexanoic acid or simply as PAP) is an oil soluble organic peracid and it is typically incorporated in to the composition up to 10 % by weight, preferably up to 8% by weight, more preferably up to 5% by weight; but is typically persent in a concentration of at least 0.1 %, more preferably at least 0.5% still more preferably at least 1 %, or even at least 2% by weight of the composition.
• PAP phtaloyl-amino-peroxycaproic acid
• the PAP is preferably solubilised in the oil/solvent phase of the water-in-oil micro- emulsion. It is expected that the PAP acts on soil during the interaction of oil droplets with the soiled substrates.
• the pH of the composition is acidic to neutral, by which is meant that the pH is between 4 and 8. The best results with compositions wherein PAP is incorporated, are obtained when the pH is in the range of 5 to 7.
• composition may further comprise builder, anti-redeposition agents, mosquito and/or insect repellents, shading dyes, antimicrobial agents (oil based), oil-soluble fluorescer, enzymes, perfumes and soil release polymers.
• Perfume may be incorporated in the composition in a concentration of between 0.1 and 5% by weight. Typically the concentration is less than 3%, even less than 2%;
• the perfume is present in a concentration of between 0.5 and 1 % by weight. It is demonstrated that perfume incorporated in a micro-emulsion provides up to 10 times better deposition on fabrics and the perfume remains for a longer period compared to only surfactant solution containing equivalent amount of perfume. Viscosity
• the viscosity of the composition is preferably low. By low is meant not more than 1000 mPa.s, more preferably not more than 500 mPa.s, preferably less than 300 mPa.s, still more preferably less than 200 mPa.s, or even less than 150 mPa.s. It is preferred that the composition has a viscosity of more than 5 mPa.s, more preferably more than 10 mPa.s, still more preferably more than 20 mPa.s or even more than 50 mPa.s. All viscosities mentioned are measured by a Cammed CSL-500 rheometer with standard cone and plate geometry, at 20 sec "1 and 25°C. pii
• the pH is preferably around neutral in a range of 4 to 8, preferably at least 5 and not more than 7. Any known pH adjustment agents or buffer may be used when required.
• the micro-emulsion is preferably made by adding in sequence the surfactant system to a oil/solvent, mixing them together by an overhead stirrer, adding optional hydrophobic ingredients such as fluorescer, bleach and essential oils/perfumes; adding aqueous phase containing electrolytes and adding enzymes/bleaches.
• Optional hydrophobic ingredients include fluorescer, perfume and water insoluble soil release polymers (e.g. gerol, trademark ex Rhodia).
• the laundry product may be packaged in a standard bottle.
• Pre-spotting products are typically filled into a dispensing device, such as, stain pens, roller balls, brush pens, and/or spays dispensers (e.g. trigger spray dispensers or squeeze bottles).
• Household cleaning products are typically in the form of trigger sprays.
• Dishwashing liquids are typically sold in bottles. Description of the Figure
• C12EO7 Nl surfactant, (Galaxy 257), ex Galaxy, India)
• water H20
• oil Methyl Decanoate
• the diagram shows the different kinds of liquids/emulsions that may be obtained and the preferred region (shaded area) of the water in oil
• W/O-ME microemulsion
• La stands for Liquid Crystalline phases
• L2 stands for Reversed Micellar Phases
• L1 stands for Micellar Phases
• ⁇ stands for Microemulsion.
• Example 1 preparation of PAP containing micro-emulsions
• the PAP may be obtained in pure form or obtained by suspending commercially available 17%w PAP suspension in water using stabilisers and structurants (ex Solvay, Italy), followed by extraction of PAP from the commercial source by using chloroform. The percentage purity of the extracted PAP is 90-92 %w. The required amount of the oil is weighed and 1-4 %wt of pure or purified PAP is mixed with the oil. Non-ionic surfactant (e.g. Galaxy 257 (Ci 2 - 15 E0 ⁇ 7> )) is then added and the mixture is stirred until a clear solution is obtained.
• Non-ionic surfactant e.g. Galaxy 257 (Ci 2 - 15 E0 ⁇ 7>
• De-ionised water is added and shaken well to get the required formulation.
• composition of the formulation is chosen from the phase regions, given in the ternary diagram (see Figure 1).
• compositions according to the invention are given in the table below.
• Table 1 Compositions
• compositions 1 - 3 compositions according to the invention (compositions 1 - 3) and a comparative composition (composition A).
• PAP is not stable in aqueous compositions, while it is reasonably stable in organic solvents.
• the PAP stability in microemulsion compositions comprising water is yet to be determined.
• the level of PAP in the product is determined by the titration under acidic conditions against thiosulfate/KI according to the following method.
• a known quantity (g) of the liquid prototype containing PAP is taken. 30ml of iso- propanol is added to dissolve the contents. Later on, 50ml of deionised (Dl) water is added, followed by 20 ml of glacial acetic acid. The mixture is stirred well. 3 g of potassium iodide (Kl) salt is weighed and added to the solution mixture.
• Dl deionised
• Kl potassium iodide
• the oxygen liberated from PAP oxidizes iodide ( ) to l 2 .
• This liberated iodine is estimated using standardized sodium thiosulfate solution, which directly corresponds to the amount of PAP initially present in the solution.
• the reaction involved in the above procedure is;
• the PAP concentration can then be calculated by the following equation:
• V (ml) Volume of thio required to reduce the Iodine liberated
• N Normality of thio solution used for the analysis
• the PAP micro-emulsion of composition 1 was used and stored for over 2 months. Samples were taken according to table 2 and analysed as indicated above. The results are shown in table 2 below.
• the PAP degradation follows a first order reaction kinetics with half life of about 30 days.
• Example 3 Washing experiment with PAP containing bleach formulation:
• composition 1 composition 1
• composition A composition 1
• terg-o-tometer (7243 Es) terg-o-tometer

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• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Inorganic Chemistry (AREA)
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• 2011
  • 2011-09-23 WO PCT/EP2011/066578 patent/WO2012041774A1/en active Application Filing
  • 2011-09-23 CN CN201180046516.4A patent/CN103119147B/zh not_active Expired - Fee Related
  • 2011-09-23 EA EA201300409A patent/EA022865B1/ru not_active IP Right Cessation
  • 2011-09-23 ES ES11760487.6T patent/ES2511465T3/es active Active
  • 2011-09-23 EP EP11760487.6A patent/EP2622056B1/de not_active Not-in-force
  • 2011-09-23 BR BR112013007234A patent/BR112013007234A2/pt not_active Application Discontinuation
• 2013
  • 2013-04-08 ZA ZA2013/02499A patent/ZA201302499B/en unknown

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