EP0499434A1 - Compositions détergentes - Google Patents

Compositions détergentes Download PDF

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Publication number
EP0499434A1
EP0499434A1 EP19920301101 EP92301101A EP0499434A1 EP 0499434 A1 EP0499434 A1 EP 0499434A1 EP 19920301101 EP19920301101 EP 19920301101 EP 92301101 A EP92301101 A EP 92301101A EP 0499434 A1 EP0499434 A1 EP 0499434A1
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EP
European Patent Office
Prior art keywords
composition according
detergent composition
formula
glycolipid
surfactant
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EP19920301101
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German (de)
English (en)
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EP0499434B1 (fr
Inventor
Peter John Unilever Research & Engineering Hall
Johan Unilever Research & Engineering Haverkamp
Cornelis Gerhard Unilever Research Van Kralingen
Michael Unilever Research & Engineering Schmidt
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Unilever PLC
Unilever NV
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Unilever PLC
Unilever NV
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Priority claimed from GB919102945A external-priority patent/GB9102945D0/en
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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
    • 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
    • C11D1/02—Anionic compounds
    • C11D1/04—Carboxylic acids or salts thereof
    • C11D1/06—Ether- or thioether carboxylic acids
    • 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
    • C11D1/37—Mixtures of compounds all of which are anionic
    • 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
    • C11D1/83—Mixtures of non-ionic with anionic compounds
    • 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
    • C11D17/0026—Structured liquid compositions, e.g. liquid crystalline phases or network containing non-Newtonian phase
    • 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
    • C11D1/667—Neutral esters, e.g. sorbitan esters

Definitions

  • the present invention relates to detergent compositions, particularly to compositions used for washing fabrics, dishes and household surfaces.
  • the compositions of the invention which are especially but not exclusively suitable for fabric washing, contain one or more glycolipid biosurfactants.
  • Detergent compositions traditionally contain one or more detergent active material in addition to various other ingredients such as detergency builders, bleaches, fluorescers, perfumes etc. Notable applications of detergent compositions are to clean fabrics, usually by washing portable fabric items in a bowl or in a washing machine, to clean crockery and cooking utensils, again by washing in a bowl (hand dishwashing), and to clean hard surfaces such as glass, glazed surfaces, plastics, metals and enamels.
  • surfactant materials A number of classes of surfactant materials have been used, some for many years, as detergent active materials, including anionic and nonionic materials.
  • Glycolipid biosurfactants which are described in more detail below, include rhamnolipids, sophoroselipids, glucoselipids, cellobioselipids and trehaloselipids. Glycolipid biosurfactants can be produced by either bacterial or yeast fermentation. This is inherently advantageous in that products of fermentation can generally be derived from renewable raw materials and are likely to be biodegradable after use.
  • JP 63 077 535A discloses an emulsion composition containing alpha-decenoic bonded rhamnolipid or its salt as emulsifying agent.
  • the emulsion is said to be useful for cosmetics, health-care products, medicines, toiletries, detergents and foods.
  • DE 3 526 417A discloses a cosmetic agent containing sophoroselipid lactone used to combat dandruff and as a bacteriostatic agent in deodorants.
  • glycolipid methyl ester from sophoroselipid. These glycolipid methyl esters are useful as a base or improving additive for various cleansers and fats and oils products and for use in painting and printing processes, fibre processing, metal processing, stationery, cosmetics, drugs, agricultural chemicals, luster prevention, synthetic resins, paper manufacturing, machinery, leather and the like.
  • glycolipid biosurfactants can give a synergistic enhancement of oily/fatty soil detergency when used in certain combinations with each other, or jointly with other surfactant(s). Enhanced detergency has been observed even with glycolipids that exhibit poor detergency when used alone.
  • the present invention accordingly provides a detergent composition
  • a detergent composition comprising
  • the invention also provides a method of washing which comprises contacting fabrics, or an inanimate surface to be cleaned, with a composition according to the previous paragraph, or a wash liquor obtainable by adding the composition to water, notably in an amount ranging from 0.5 to 50 grams of compositions per litre of water.
  • the detergent composition of the invention contains at least two different surfactants having different characteristics, at least one of which must be a glycolipid biosurfactant.
  • micellar phase and lamellar phase surfactants relate to the phase in which the surfactants are likely to be present under typical wash conditions.
  • the two types of surfactant may be distinguished by the behaviour of a 1 % by weight aqueous solution in demineralised water at pH 7.0 and 25°C.
  • a surfactant solution containing dispersed lamellar phases exhibits birefringent textures when viewed under a polarising optical microscope, while a micellar solution does not.
  • micellar phase surfactant will provide a clear solution when present at a concentration of 1% by weight in demineralised water at pH 7.0 and 25°C, although the presence of small amounts of impurities may reduce the clarity.
  • a lamellar phase surfactant will always provide a cloudy solution when present at a concentration of 1% by weight in demineralised water at pH 7.0 and 25°C.
  • At least one of the surfactants must be chosen from a specific class of surfactant, the glycolipid biosurfactants; while the other may or may not also be a glycolipid biosurfactant.
  • the glycolipid biosurfactants are micellar phase surfactants and others are lamellar phase surfactants.
  • Glycolipid surfactants with which the present invention are concerned include rhamnolipids, glucoselipids, sophoroselipids, trehaloselipids, cellobioselipids and mixtures thereof. Within any one class of glycolipids, some materials may be micellar and others lamellar.
  • Micellar phase glycolipid biosurfactants may suitably be selected from rhamnolipids, glucoselipids, sophoroselipids, cellobioselipids and mixtures thereof.
  • Lamellar phase glycolipid biosurfactants may suitably be selected from rhamnolipids, glucoselipids, trehaloselipids and mixtures thereof.
  • the surfactants (i) and (ii) may both be glycolipids.
  • the micellar phase glycolipid is then most preferably a rhamnolipid, a sophoroselipid or a cellobiose lipid, while the lamellar phase glycolipid is most preferably a trehaloselipid, a glucoselipid or a rhamnolipid.
  • one of the surfactants (i) and (ii) may be a non-glycolipid surfactant, preferably an anionic or nonionic surfactant.
  • Zwitterionic and cationic surfactants are not preferred, and if present it is desirable that they are at low levels, such as not more than 10% by weight of all surfactant present.
  • the weight ratio of the first surfactant (i) to the second surfactant (ii) is preferably in the range from 20:1 to 1:20, and may lie in a narrower range, for example from 10:1 to 1:10, more preferably 4:1 to 1:4.
  • biosurfactants include rhamnolipids, glucoselipids, sophoroselipids, trehaloselipids, cellobioselipids and mixtures thereof. Each will now be described in more detail below:
  • biosurfactants have the formula (I): where a is 1 or 2; b is 1 or 2, n is 4 to 10. preferably 6; R1 is H or a cation, preferably H, or a monovalent solubilising cation, R2 is H or the group preferably H; m is 4 to 10; and the values of m and n need not be the same at each occurrence.
  • Rhamnolipids can be produced by bacterial fermentation. This is inherently advantageous in that products of bacterial fermentation can generally be derived from renewable raw materials and are likely to be biodegradable after use. Another advantage of the surfactants of formula (I) is that they can be produced as a by-product of enzyme manufacture.
  • Rhamnolipids can be produced by bacteria of the genus Pseudomonas .
  • the bacterial fermentation typically utilises as substrates a sugar or glycerol or an alkane or mixtures thereof.
  • any sample of rhamnolipid will generally contain a variety of individual compounds within the general formula (I).
  • the proportions of individual compounds is governed by the microorganism species, and the particular strain employed for fermentation, the substrate materials supplied to the fermentation, and other fermentation conditions.
  • the bacterial fermentation generally produces compounds in which R1 is hydrogen or a solubilising cation. Such compounds can undergo conversion between the salt and the acid forms in aqueous solution, according to the pH of the solution. Common solubilising cations are alkali metal, ammonium and alkanolamine.
  • a second class of glycolipid biosurfactant in accordance with the present invention comprises glucoselipids of the formula (II). where R1 is H or a cation; p is 1 to 4; and q is 4 to 10, preferably 6.
  • Glucoselipids can be produced by the bacterium Alcaligenes Sp.MMl . Appropriate fermentation methods are reviewed by M. Schmidt in his PhD thesis (1990), Technical University of Braunschweig, and by Schulz et al (1991) Z. Naturforsch 46C 197-203. The glucoselipids are recovered from the fermentation broth via solvent extraction using ethyl ether or a mixture of either dichloromethane:methanol or chloroform:methanol.
  • a third class of glycolipid biosurfactant in accordance with the present invention comprises sophoroselipids of the formula (III) where R3 and R4 are individually H or an acetyl group; R5 is a saturated or unsaturated, hydroxylated or non-hydroxylated hydrocarbon group having 1 to 9 carbon atoms, preferably being a methyl group; R6 is a saturated or unsaturated hydroxylated or non-hydroxylated hydrocarbon group having 1 to 19 carbon atoms; with the proviso that the total number of carbon atoms in the groups R5 and R6 does not exceed 20 and is preferably from 14 to 18.
  • the sophoroselipid may be incorporated into detergent compositions of the present invention as either the open chain free acid form, where R7 is H and R8 is OH, or in its lactone form, where a lactone ring is formed between R7 and R8 as shown by formula (IV).
  • R3, R4 and R6 are as defined above; with the proviso that at least one of R3 and R4 is an acetyl group.
  • Sophoroselipids can be produced by yeast cells, for example Torulopsis apicola and Torulopsis bombicola .
  • the fermentation process typically utilises sugars and alkanes as substrates.
  • Appropriate fermentation methods are reviewed in A P Tulloch, J F T Spencer and P A J Gorin, Can. J Chem (1962) 40 1326 and U Gobbert, S Lang and F Wagner, Biotechnology Letters (1984) 6 (4), 225.
  • the resultant product is a mixture of various open-chain sophoroselipids and sophoroselipid lactones, which may be utilised as a mixtures, or the required form can be isolated.
  • the glycolipid biosurfactant comprises sophoroselipids
  • the weight ratio of sophoroselipids to additional surfactant is preferably in the range 4:1 to 3:2 and is more preferably 4:1.
  • a fourth class of glycolipid biosurfactant in accordance with the present invention comprises trehaloselipids of the general formula (V). where R9, R10 and R11 are individually a saturated or unsaturated, hydroxylated or non-hydroxylated hydrocarbon of 5 to 13 carbon atoms.
  • Trehaloselipids can be produced by bacteria fermentation using the marine bacterium Arthrobacter sp. Ek l or the fresh water bacterium Rhodococcus erythropolis . Appropriate fermentation methods are provided by Ishigami et al (1987) J. Jpn Oil Chem Soc 36 847-851, Schultz et al (1991), Z. Naturforsch 46C 197-203; and Passeri et al (1991) Z Naturforsch 46C 204-209.
  • a fifth class of glycolipid biosurfactant in accordance with the present invention comprises cellobioselipids of the general formula (VI).
  • R1 is H or a cation
  • R12 is a saturated or non-saturated, hydroxylated or non-hydroxylated hydrocarbon having 9 to 15 carbon atoms, preferably 13 carbon atoms
  • R13 is H or an acetyl group
  • R14 is a saturated or non-saturated, hydroxylated or non-hydroxylated hydrocarbon having 4 to 16 carbon atoms.
  • Cellobioselipids can be produced by fungi cells from the genus ustilago . Appropriate fermentation methods are provided by Frautz, Lang and Wagner (1986) Biotech Letts 8 757-762.
  • the weight ratio of cellobioselipids to additional surfactant is preferably in the range 4:1 to 2:3.
  • the detergent composition of the invention may optionally contains at least one non-glycolipid surfactant in addition to the glycolipid biosurfactant(s) described above, provided that at least one micellar phase surfactant and at least one lamellar phase surfactant are present.
  • the glycolipid biosurfactant is micellar phase and the non-glycolipid surfactant is lamellar phase.
  • the non-glycolipid surfactant can be chosen from anionic surfactants, nonionic surfactants, zwitterionic surfactants, cationic surfactants; but if zwitterionic or cationic surfactants are present, it is desirable that they are incorporated at low levels, such as not more than 10% by weight of all surfactant present.
  • anionic surfactants examples include alkyl benzene sulphonates, alkyl ether sulphates, olefin sulphonates, alkyl sulphonates, secondary alkyl sulphonates, fatty acid ester sulphonates, dialkyl sulphosuccinates, alkyl orthoxylene sulphonates and other disclosed in the literature, especially 'Surface Active Agents' Vol. 1, by Schwartz & Perry, Interscience 1949 and 'Surface Active Agents' Vol.
  • alkyl benzene sulphonates include alkali metal, ammonium or alkanolamine salts of alkylbenzene sulphonates having from 10 to 18 carbon atoms in the alkyl group.
  • Suitable alkyl and alkylether sulphates include those having from 10 to 24 carbon atoms in the alkyl group, the alkylether sulphates have from 1 to 5 ethylene oxide groups.
  • Suitable olefin sulphonates are those prepared by sulphonation of C10-C24 alpha-olefins and subsequent neutralisation and hydrolysis of the sulphonation reaction product.
  • alkyl sulphates or sulphated fatty alcohol salts
  • alkyl sulphates include those of mixed alkyl chain length, in which the ratio of C12 alkyl chains to C18 alkyl chains is in the range of from 9:4 to 1:6.
  • a suitable material can be obtained from a mixture of synthetic lauryl and oleyl alcohols in appropriate properties.
  • fatty acid ester sulphonates include those of the general formula wherein R1 is derived from tallow, palm or coconut oil and R2 is a short chain alkyl group such as butyl.
  • dialkyl sulphosuccinates include those in which both alkyl substituent contains at least 4 carbon atoms, and together contain 12 to 20 carbon atoms in total, such as di-C8 alkyl sulphosuccinate.
  • alkyl orthoxylene sulphonates include those in which the alkyl group contains from 12 to 24 carbon atoms.
  • anionic surfactants which may be used include alkali metal soaps of a fatty acid, preferably one containing 12 to 18 carbon atoms.
  • Typical such acids are oleic acid, ricinoleic acid and fatty acids derived from caster oil, rapeseed oil, groundnut oil, coconut oil, palmkernal oil or mixtures thereof.
  • the sodium or potassium soaps of these acids can be used.
  • soaps can act as detergency builders or fabric conditioners.
  • Dialkyl sulphosuccinates are of especial interest as lamellar phase anionic surfactants for use in the present invention.
  • Nonionic detergent compounds which may be used are alkyl (C6 ⁇ 22) phenol-ethylene oxide condensates, the condensation products of linear or branched aliphatic C8 ⁇ 20 primary or secondary alcohols with ethylene oxide, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine.
  • Other so-called nonionic detergent compounds include long-chain tertiary amine oxides; alkyl sulphoxides C10-C14 alkyl pyrollidones and tertiary phosphine oxides.
  • Suitable lamellar phase nonionic surfactants include those with an HLB value below 10.5, preferably below 10 and more preferably in a range of from 8.5 to 9.5.
  • HLB value is defined as one fifth of the mole per cent of ethylene oxide in the molecule.
  • Suitable nonionic surfactants may be ethoxylated materials, especially ethoxylated aliphatic alcohols, with a relatively low proportion of ethoxylation so as to give an HLB value below 10.5.
  • any ethylene oxide content of the nonionic surfactant be ⁇ 5% by weight of the surfactant system, or zero, and various non-ethoxylated nonionic surfactants are also suitable for use in the present invention.
  • alkyl polyglycosides of general formula in which R15 is an organic hydrophobic residue containing 10 to 20 carbon atoms, R16 contains 2 to 4 carbon atoms, G is a saccharide residue containing 5 to 6 carbon atoms, t is in the range 0 to 25 and y is in the range from 1 to 10.
  • the hydrophobic group R15 is preferably alkyl, alkenyl, hydroxyalkyl or hydroxyalkenyl. However, it may include an aryl group for example alkyl-aryl, alkenyl-aryl and hydroxyalkyl-aryl. Particularly preferred is that R is alkyl or alkenyl of 10 to 16 carbon atoms, more particularly 12 to 14 carbon atoms.
  • t in the general formula above is preferably zero, so that the -(R16O) t - unit of the general formula is absent.
  • R16O is an ethylene oxide residue.
  • Other likely possibilities are propylene oxide and glycerol residues.
  • the value of t (which may be an average value) will preferably lie in the range from 0.5 to 10.
  • the group G is typically derived from fructose glucose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose and/or ribose.
  • the G is provided substantially exclusively by glucose units.
  • Intersaccharide bonds may be from a 1-position to a 2, 3, 4 or 6-position of the adjoining saccharide.
  • Hydroxyl groups on sugar residues may be submitted, e.g. etherified with short alkyl chains of 1 to 4 carbon atoms.
  • y which is an average, desirably lies between 1 and 4, especially 1 and 2.
  • Alkyl polyglycosides of formula R15O(G) y i.e. a formula as given above in which t is zero, are available from Horizon Chemical Co.
  • O-alkanoyl glucosides are described in International Patent Application WO 88/10147 (Novo Industri A/S).
  • the surfactants described therein are glucose esters with the acyl group attached in the 3- or 6- position such as 3-0-acyl-D-glucose or 6-0-acyl-D-glucose.
  • a 6-0-alkanoyl glucoside especially compounds having the formula: wherein R17 is an alkyl or alkenyl group having from 7 to 19 preferably 11 to 19 carbon atoms, and R18 is hydrogen or an alkyl group having from 1 to 4 carbon atoms.
  • R18 is an alkyl group, such as ethyl or isopropyl.
  • Alkylation in the l- position enables such compounds to be prepared by regiospecific enzymatic synthesis as described by Bjorkling et al. (J.Chem. Soc., Chem. Common. 1989 p934) the disclosure of which is incorporated herein by reference.
  • esters of glucose are contemplated especially, it is envisaged that corresponding materials based on other reduced sugars, such as galactose and mannose are also suitable.
  • nonionic surfactants are monoglyceryl ethers or esters of the respective formulae
  • R19 is preferably a saturated or unsaturated aliphatic residue.
  • R19 may be linear or branched alkyl or alkenyl. More preferably, R19 is a substantially linear alkyl or alkenyl moiety having from 9 to 16 carbon atoms, notably a C8-C12 alkyl moiety. Most preferably, R19 is decyl, undecyl or dodecyl.
  • the monoglyceryl ethers of alkanols are known materials and can be prepared, for example by the condensation of a higher alkanol and glycidol.
  • Glycerol monoesters are of course well know and available from various suppliers including Alkyril Chemicals Inc.
  • Nonionic surfactants of interest for use in the present invention is comprised by 1,2-diols of the general formula where R is a saturated or unsaturated hydrocarbon group containing from 8 to 16 carbon atoms.
  • compositions of this invention will generally contain a surfactant mixture comprising micellar phase surfactant (i) and lamellar phase surfactant(s) (ii) in an amount which is from 1 to 60% by weight of the composition; preferably from 2 to 45%; more preferably from 5 to 40%; most preferably from 5 to 35%.
  • a surfactant mixture comprising micellar phase surfactant (i) and lamellar phase surfactant(s) (ii) in an amount which is from 1 to 60% by weight of the composition; preferably from 2 to 45%; more preferably from 5 to 40%; most preferably from 5 to 35%.
  • the amount of glycolipid biosurfactant present is preferably at least 2% by weight, more preferably at least 5%, of the overall composition.
  • the weight ratio range which gives enhanced detergency will vary depending on the specific surfactants used and can be determined by experiment. In general the proportion of glycolipid biosurfactant should be low when its alkyl chains are shorter, but higher if its alkyl chains are longer.
  • micellar phase surfactant to lamellar phase surfactant will generally lie within a range of 20:1 to 1:20 and may lie in a narrower range, e.g. from 10:1 to 1:10; more preferably 4:1 to 1:4.
  • the proportions of the surfactants are desirably such as to give better oily soil detergency than given by the (or either) glycolipid biosurfactant alone, the total amount of surfactant being the same.
  • the proportions are desirably such as to give better oily soil detergency that that given by the non-glycolipid surfactant alone, the total amount of surfactant being the same.
  • composition of the invention is intended for fabric washing, it will generally contain one or more detergency builders, suitably in an amount of from 5 to 80% by weight, preferably from 7 to 70% by weight, more preferably from 20 to 80% by weight. If it is in solid form, the composition is likely to contain at least 10 or 15% of builder. This may be any material capable of reducing the level of free calcium ions in the wash liquor and will preferably provide the compositions with other beneficial properties such as the generation of an alkaline pH and the suspension of soil removed from the fabric.
  • Preferred builders include alkali metal (preferably sodium) aluminosilicates, which may suitably be incorporated in amounts of from 5 to 60% by weight (anhydrous basis) of the composition, and may be either crystalline or amorphous or mixtures thereof, having the general formula: 0.8-1.5 Na20.Al203.0.8-6 SiO2
  • the preferred sodium aluminosilicates contain 1.5-3.5 SiO2 units (in the formula above). Both the amorphous and the crystalline materials can be prepared readily by reaction between sodium silicate and sodium aluminate, as amply described in the literature.
  • Suitable crystalline sodium aluminosilicate ion-exchange detergency builders are described, for example, in GB 1 429 143 (Procter & Gamble).
  • the preferred sodium aluminosilicates of this type are the well-known commercially available zeolites A and X, and mixtures thereof.
  • Also of interest is the novel zeolite P described and claimed in EP 384070 (Unilever).
  • Phosphate-built detergent compositions are also within the scope of the invention.
  • phosphorus-containing inorganic detergency builders include the water-soluble salts, especially alkali metal pyrophosphates, orthophosphates, polyphosphates and phosphonates.
  • Specific examples of inorganic phosphate builders include sodium and potassium tripolyphosphates, ortho phosphates and hexametaphosphates.
  • preferred detergent compositions of the invention preferably do not contain more than 5% by weight of inorganic phosphate builders, and are desirably substantially free of phosphate builders.
  • Inorganic builders that may be present include alkali metal (generally sodium) carbonate; while organic builders include polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphinates; monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinates, carboxymethyloxysuccinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates; and organic precipitant builders such as alkyl- and alkenylmalonates and succinates, and sulphonated fatty acid salts.
  • alkali metal generally sodium
  • organic builders include polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphinates; monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinate
  • Especially preferred supplementary builders are polycarboxylate polymers, more especially polyacrylates and acrylic/maleic copolymers, suitably used in amounts of from 0.5 to 15% by weight, especially from 1 to 10% by weight; and monomeric polycarboxylates, more especially citric acid and its salts, suitably used in amounts of from 3 to 20% by weight, more preferably from 5 to 15% by weight.
  • fabric washing compositions according to the invention be approximately neutral or at least slightly alkaline, that is when the composition is dissolved in an amount to give surfactant concentration of 1 g/l in distilled water at 25°C the pH should desirably be at least 7.5.
  • the pH will usually be greater, such as at least 9.
  • the compositions may include a water-soluble alkaline salt. This salt may be a detergency builder (as described above) or a non-building alkaline material.
  • compositions of the invention may contain an electrolyte, for instance present in such an amount to give a concentration of at least 0.01 molar, when the composition is added to water at a concentration of 1 g/litre.
  • Electrolyte concentration may possibly be higher such as at least 0.05 or 0.1 molar especially if the composition is of solid form: liquid compositions generally limit electrolyte for the sake of stability. 1 g/litre is approximately the lowest level at which detergent compositions for fabric washing are used in usual practice. More usual is usage at a level of 4 to 50 g/litre.
  • the amount of electrolyte may be such as to achieve an electrolyte concentration of 0.01 molar, most preferably at least 0.1 molar, when the composition is added to water at a concentration of 4 g/litre.
  • ingredients which can optionally be employed in the detergent composition of the invention include polymers containing carboxylic or sulphonic acid groups in acid form or wholly or partially neutralised to sodium or potassium salts, the sodium salts being preferred.
  • Preferred polymers are homopolymers and copolymers of acrylic acid and/or maleic acid or maleic anhydride.
  • polyacrylates polyalphahydroxy acrylates, acrylic/maleic acid copolymers, and acrylic phosphinates.
  • Other polymers which are especially preferred for use in liquid detergent compositions are deflocculating polymers such as for example disclosed in EP 346995.
  • the molecular weights of homopolymers and copolymers are generally 1000 to 150 000, preferably 1500 to 100 000.
  • the amount of any polymer may lie in the range from 0.5 to 5% by weight of the composition.
  • Other suitable polymeric materials are cellulose ethers such as carboxy methyl cellulose, methyl cellulose, hydroxy alkyl celluloses, and mixed ethers, such as methyl hydroxy ethyl cellulose, methyl hydroxy propyl cellulose, and methyl carboxy methyl cellulose. Mixtures of different cellulose ethers, particularly mixtures of carboxy methyl cellulose and methyl cellulose, are suitable.
  • Polyethylene glycol of molecular weight from 400 to 50 000, preferably from 1000 to 10 000, and copolymers of polyethylene oxide with polypropylene oxide are suitable as also are copolymers of polyacrylate with polyethylene glycol.
  • Polyvinyl pyrrolidone of molecular weight of 10 000 to 60 000, preferably of 30 000 to 50 000 and copolymers of polyvinyl pyrrolidone with other poly pyrrolidones are suitable.
  • Polyacrylic phosphinates and related copolymers of molecular weight 1000 to 100 000, in particular 3000 to 30 000, are also suitable.
  • an amount of an alkali metal silicate particularly sodium ortho-, meta- or preferably neutral or alkaline silicate.
  • alkali metal silicates at levels, for example, of 0.1 to 10% by weight, may be advantageous in providing protection against the corrosion of metal parts in washing machines, besides providing some measure of building and giving processing benefits.
  • ingredients which may be present in the composition include fabric softening agents such as fatty amines, fabric softening clay materials, lather boosters such as alkanolamides, particularly the monoethanolamides derived from palm kernel fatty acids and coconut fatty acids; lather depressants; oxygen-releasing bleaching agents such as sodium perborate and sodium percarbonate; peracid bleach precursors; chlorine-releasing bleaching agents such as trichloroisocyanuric acid; heavy metal sequestrants such as EDTA; fluorescent agents; perfumes including deodorant pefumes; enzymes such as cellulases, proteases, lipases and amylases; germicides; pigments, colourants or coloured speckles; and inorganic salts such as sodium and magnesium sulphate.
  • Sodium sulphate may if desired be present as a filler material in amounts up to 40% by weight of the composition; however, as little as 10% or less by weight of the composition of sodium sulphate, or even none at all,
  • the detergent compositions according to the invention may be in any suitable form including powders, bars, liquids and pastes.
  • suitable liquid compositions may be non-aqueous or aqueous, the latter being either isotropic or lamellar structured.
  • the compositions may be prepared by a number of different methods according to their physical form. In the case of granular products they may be prepared by dry-mixing, coagglomeration, spray-drying from an aqueous slurry or any combination of these methods.
  • One preferred physical form is a granule incorporating a detergency builder salt. This may be prepared by conventional granulation techniques or spray-drying.
  • micellar phase surfactant (i) a rhamnolipid produced as a by-product during fermentation using Pseudomonas glumae with glucose and glycerol as substrates. Partial characterisation of the dried material obtained from the fermentation showed that it contained one or more compounds of formula I above, in which the value of n was 10.
  • the lamellar phase surfactant (ii) was an ethoxylated aliphatic alcohol.
  • Aqueous wash liquors were prepared containing the following materials in deionised water:
  • the wash liquor had pH about 10.7 resulting from the presence of the metaborate.
  • Wash liquors were prepared with various ratios of the two surfactants and used to wash polyester test cloths soiled with radiolabelled triolein. Washing was carried out at 40°C for 20 minutes in a Tergotometer.
  • triolein The removal of triolein was determined using radiotracer techniques and the results are set out in Table 1. Clearly all the mixtures of the rhamnolipid and the ethoxylate nonionic surfactant gave better detergency than either surfactant alone.
  • Example 1 was repeated, replacing the ethoxylate nonionic surfactant with an anionic surfactant, di-C8 alkyl sulphosuccinate, as the lamellar surfactant (ii).
  • the results are set out in Table 2.
  • micellar surfactant i
  • BioEm-LKP trade mark
  • Results are set out in Table 3, which shows a very considerable synergistic effect.
  • Aqueous wash liquors were prepared containing the following materials in deionised water:
  • the wash liquor had a pH of about 10 resulting from the presence of metaborate.
  • the tests were performed in 100 ml polyethylene bottles with 30 ml/bottle wash liquor, 1 piece of 6 x 6 cm text cloth and 1 piece of 6 x 6 cm white (clean) cotton as a redeposition cloth.
  • the cloth:liquor ratio/bottle was 1:30.
  • a maximum of 50 of these bottles were agitated for 30 minutes in a Miele TMT washing machine at 40°C. Afterwards, the washed test fabrics were rinsed 3 times with cold water before drying.
  • - BioEm-LKP trade mark (trade mark) (Petrogen Inc, Illinois) is a mixture of rhamnolipids from Pseudomonas as described in Example 2. Results are shown in Table 5.
  • sophoroselipids SOL-TUBS (micellar phase) was tested in combination with several lamellar phase surfactants in the described wash liquor. Cosurfactants tested were Synperonic A3, C12-1,2-diol and C10-mono-glycerolether. Results are shown in Table 6.
  • the sophoroselipid SOL-CH (micellar phase) was tested as described in Example 5. Results are shown in Table 7.
  • SOL-CH is a sophoroselipid produced by the yeast strain Torulopsis bombicola . It consists of a mixture of at least 8 sophoroselipids of formula (III) and (IV).
  • the sophoroselipid (SOL-COO ⁇ ) (micellar phase) was tested as described in Example 5. Results are shown in Table 8.
  • SOL-COO ⁇ is a sophoroselipid produced by the yeast strain Torulopsis bombicola and is partially hydrolysed, ie has the structure (III) where R3 and R4 are H; R5 is 1; R6 is 15; R7 is H and R8 is OH.
  • CELL-TUBS Cellobioselipids
  • Ustilago maydis were tested in combination with several lamellar phase surfactants in the described wash liquor.
  • Cosurfactants tested were Synperonic A3, C12-1,2-dio and C10-mono-glycerolether. Results are shown in Table 9.
  • CBL-TUBS consists of approximately 4 cellobioselipids of formula (IV).
  • R1 is H;
  • R12 is 15;
  • R13 is acetyl;
  • R14 is 4.
  • Trehaloselipid (THL-4) (lamellar phase) was tested in combination with rhamnolipid BioEm-LKP as described in Example 2 (micellar phase).
  • the trehaloselipid THL-4 was produced by the bacterium Arthrobacter sp.Ekl and consists of trehaloselipid of formula (V) in which R9, R10, R11 have an average of 7-9 carbon atoms.
  • test system The test system
  • Aqueous wash liquors were prepared containing the following materials in deionised water: glycolipid biosurfactant(s) (as dried material from the fermentation) any non-glycolipid surfactant detergent base powder as shown in Table 12.
  • Total surfactant concentration was 0.5 g/litre.
  • the detergent base powder was incorporated at 2.5 g/litre. Test conditions and monitoring methods were as described for Examples 4 to 10.
  • the cellobioselipid CBL-TUBS as described in Example 8 was tested in combination with Synperonic A3 (lamellar phase). Results are shown in Table 14.

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WO1996014376A1 (fr) * 1994-11-04 1996-05-17 Novo Nordisk A/S Gels a base de glycolipide/mpg
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WO2003002700A1 (fr) * 2001-06-27 2003-01-09 Saraya Co., Ltd. Compositions detergentes peu moussantes
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EP0550276A1 (fr) * 1991-12-31 1993-07-07 Unilever Plc Composition contenant des tensioactifs glycolipidique anioniques
US5501812A (en) * 1991-12-31 1996-03-26 Lever Brothers Company, Division Of Conopco, Inc. Toilet bar compositions containing glycolipid surfactants and a process for manufacturing such surfactants
EP0562914A1 (fr) * 1992-03-26 1993-09-29 Institut Français du Pétrole Procédé de lavage de particules solides comportant une solution de sophorosides
EP0605308A1 (fr) * 1992-12-30 1994-07-06 Institut Francais Du Petrole Composition contenant un composé tensio-actif et des glycolipides et procédé de décontamination d'un milieu poreux pollué
FR2699928A1 (fr) * 1992-12-30 1994-07-01 Inst Francais Du Petrole Composition contenant un composé tensio-actif et des sophorolipides et procédé de décontamination d'un milieu poreux pollué par des hydrocarbures.
US5654192A (en) * 1992-12-30 1997-08-05 Institut Francais Du Petrole Composition containing a surface active compound and glycolipids and decontamination process for a porous medium polluted by hydrocarbons
FR2713655A1 (fr) * 1993-12-15 1995-06-16 Inst Francais Du Petrole Procédé de décontamination d'un milieu poreux pollué par des hydrocarbures utilisant une composition contenant un composé tensio-actif et des glycolipides.
US5393453A (en) * 1994-02-03 1995-02-28 Colgate Palmolive Co. Thickened composition containing glycolipid surfactant and polymeric thickener
WO1996014376A1 (fr) * 1994-11-04 1996-05-17 Novo Nordisk A/S Gels a base de glycolipide/mpg
AU687269B2 (en) * 1994-11-04 1998-02-19 Novo Nordisk A/S Glycolipid/MPG gels
EP0727485A1 (fr) * 1995-02-16 1996-08-21 Stichting Nederlands Instituut Voor Koolhydraat Onderzoek Tno Méthode pour la conversion d'un matériel amidoné et composition enzymatique adaptée
NL9500292A (nl) * 1995-02-16 1996-10-01 Stichting Nl Instituut Voor Ko Werkwijze voor omzetting van een zetmeelmateriaal, en daarvoor bruikbaar enzympreparaat.
FR2740779A1 (fr) * 1995-11-08 1997-05-09 Rhone Poulenc Chimie Composition a base d'enzyme et de sophorolipide sous forme lactone et son utilisation dans les formulations detergentes pour le lavage du linge
DE19600743A1 (de) * 1996-01-11 1997-07-24 Henkel Kgaa Verwendung von Mischungen aus Glycolipiden und Tensiden
WO2003002700A1 (fr) * 2001-06-27 2003-01-09 Saraya Co., Ltd. Compositions detergentes peu moussantes
WO2003006146A1 (fr) * 2001-07-13 2003-01-23 Cognis France S.A. Preparations aqueuses
FR2827192A1 (fr) * 2001-07-13 2003-01-17 Cognis France Sa Preparations contenant des agents tensio-actifs non ioniques comme agents d'extraction
EP1445302A1 (fr) * 2003-01-28 2004-08-11 Ecover Belgium Compositions détergentes
EP1750726A2 (fr) * 2004-03-19 2007-02-14 GROSS, Richard A. Proprietes spermicides et virocides de differentes formes de sophorolipides
EP1750726A4 (fr) * 2004-03-19 2010-06-16 Richard A Gross Proprietes spermicides et virocides de differentes formes de sophorolipides
US8563490B2 (en) 2010-03-31 2013-10-22 Conopco, Inc. Mild to the skin, foaming detergent composition
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EP2596087B1 (fr) 2010-07-22 2015-12-16 Unilever PLC Combinaisons de rhamnolipides et d'enzymes pour nettoyage amélioré
WO2012010406A1 (fr) * 2010-07-22 2012-01-26 Unilever Plc Combinaisons de rhamnolipides et d'enzymes pour nettoyage amélioré
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ES2075608T3 (es) 1995-10-01
DE69203473D1 (de) 1995-08-24
DE69203473T2 (de) 1996-01-11
EP0499434B1 (fr) 1995-07-19
CA2060698A1 (fr) 1992-08-13
CA2060698C (fr) 1997-09-30
JPH0559394A (ja) 1993-03-09

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