EP3172309B1 - Verwendung einer spezifischen seifenstück-zusammensetzung zur verbesserung des schaums in gegenwart von wasser mit hoher elektrolytkonzentration - Google Patents

Verwendung einer spezifischen seifenstück-zusammensetzung zur verbesserung des schaums in gegenwart von wasser mit hoher elektrolytkonzentration Download PDF

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Publication number
EP3172309B1
EP3172309B1 EP15733652.0A EP15733652A EP3172309B1 EP 3172309 B1 EP3172309 B1 EP 3172309B1 EP 15733652 A EP15733652 A EP 15733652A EP 3172309 B1 EP3172309 B1 EP 3172309B1
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EP
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Prior art keywords
bar
water
bar composition
lather
fatty acid
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EP15733652.0A
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English (en)
French (fr)
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EP3172309A1 (de
Inventor
Rafael Astolfi
Emiliana Alves Dos Reis Gati
Sergio Roberto Leopoldino
Luiz Felipe Costa Vidigal
Venugopal Vijayakrishnan
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Unilever PLC
Unilever NV
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Unilever PLC
Unilever NV
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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
    • C11D9/00—Compositions of detergents based essentially on soap
    • C11D9/02—Compositions of detergents based essentially on soap on alkali or ammonium soaps
    • 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
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0094—High foaming 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
    • C11D9/00—Compositions of detergents based essentially on soap
    • C11D9/007—Soaps or soap mixtures with well defined chain length
    • 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
    • C11D9/00—Compositions of detergents based essentially on soap
    • C11D9/04—Compositions of detergents based essentially on soap containing compounding ingredients other than soaps
    • C11D9/22—Organic compounds, e.g. vitamins
    • C11D9/26—Organic compounds, e.g. vitamins containing oxygen

Definitions

  • Soap bars for cleansing are typically prepared by saponification (e.g., neutralization) of triglyceride/fatty acids.
  • various fats e.g., tallow, palms and coconut oil blends
  • alkali typically NaOH
  • alkaline salts of fatty acid derived from the fatty acid chains forming the glyceride
  • Glycerol may optionally be extracted with brine (e.g., water with high sodium concentration) to yield dilute fatty acid soap solution containing soap and aqueous phase (e.g., 70% soap and 30% aqueous phase).
  • the soap solution is then typically dried (e.g., to about 12% water) and the remaining mass is milled, plodded and stamped into bars.
  • the soap solution can be cast in to moulds, blisters etc.
  • the chain length of fatty acid soaps varies depending on starting fat or oil feedstock (for purposes of this specification, “oil” and “fat” are used interchangeably, except where context demands otherwise).
  • Longer chain fatty acid soaps e.g., C 16 palmitic or C 18 stearic
  • shorter chain soaps e.g., C 12 lauric
  • the fatty acid soaps produced may also be saturated or unsaturated (e.g., oleic acid).
  • longer molecular weight fatty acid soaps e.g., C 14 to C 22 soaps
  • shorter molecular weight soaps e.g., C 8 to C 12
  • Unsaturated soaps e.g., oleic
  • oleic are soluble and lather quickly, like short-chained soaps, but form a denser, creamier foam, like the longer chained soaps. The particular mixture of chain lengths is critical for establishing lather quality.
  • soap bar When synthetic surfactant (e.g., nonionic surfactant) is added to enhance mildness, typically the soap bar must still be predominantly made of long-chain soaps to ensure the bar is well structured and can maintain structure in stamping.
  • synthetic surfactant e.g., nonionic surfactant
  • WO 93/04161 discloses bars comprising mixtures of soap, C 14 - C 20 alkyl polyethoxylate nonionic and C 16 - C 18 acyl isethionate (also a mild surfactant).
  • the soap used comprises at least tallow (longer chain, slower lather) and includes cationic polymeric skin mildness aids and, as moisturizers, free fatty acid.
  • references in the art have disclosed use of specially tailored soaps (which involved additional, expensive processing) and/or use of additional, expensive co-actives.
  • Kefauver et al. discloses a mild, lathering personal cleansing soap bar composition comprising from 30 to 85 by wt. tailored fatty acid soap comprising in turn from 50% to 85% of saturated fatty acid soap selected from the group consisting of: myristic, palmitic, and stearic acid soaps. Kefauver fails to disclose specific ratio levels of capric and lauric fatty acid soaps, together with maximum levels of myristic fatty acid, or maximum levels of unsaturated C 18 acids other than monounsaturated oleic.
  • U.S. Patent No. 5,656,579, Chambers et al. discloses a mild toilet soap bar comprising blends of soap with one or more coactives, comprising at least 25% wt. on total actives of lauric acid soaps. Again, Chambers fails to disclose soap bar formulations having maximum amounts of myristic acid soap or of unsaturated C 18 other than oleic combined with ratios of capric and lauric fatty acid soaps as claimed in our invention.
  • WO 2013/076047 relates to soap bars having improved lather, with limited amounts of myristic acid, with defined ratios of sum of C 8 -C 10 fatty acids to C 12 fatty acid.
  • Figure 1 is series of photos showing how lather is defined on a visual scale using qualitative lather volume assessment protocol. The scale applies numerical values to the qualitative determination.
  • compositions and methods for enhancing lather wherein, by rebalancing short chain fatty acids (e.g., ratio of C 10 to C 12 , using no more than a maximum amount of C 14 , using specific amount and types of unsaturated C 18 ), copious lather can be produced even in water having high concentration of electrolyte (e.g., defined by water hardness value greater than about 25 °FH, preferably greater than about 50 °FH, preferably greater than about 75 °FH; water hardness of seawater is about 635 °FH.
  • short chain fatty acids e.g., ratio of C 10 to C 12 , using no more than a maximum amount of C 14 , using specific amount and types of unsaturated C 18
  • copious lather can be produced even in water having high concentration of electrolyte (e.g., defined by water hardness value greater than about 25 °FH, preferably greater than about 50 °FH, preferably greater than about 75 °FH; water hardness
  • the present invention relates to the use of a soap bar composition which enhances lather when used with water having high concentration of electrolyte (i.e. having hardness of greater than about 25 °FH).
  • the bar compositions comprise:
  • the invention relates to the use of a bar for enhancing lather when washing in water having high amount of dissolved salt, particularly divalent salts such as calcium and magnesium and monovalent salts such as sodium (i.e., high electrolyte containing water).
  • Lather is enhanced in water having hardness of greater than about 25 °FH, more preferably greater than about 50g °FH.
  • the use comprises lathering in water of noted hardness with bars having the composition noted above to achieve enhanced lather (e.g., improvement of greater than about 30% in lather) when compared to the lather formed using bars in which the ratio of C 10 to C 12 , the maximum amounts of C 14 , and the maximum amounts of unsaturated C 18 other than oleic are outside those claimed above. Specifically, the criteria noted must be used.
  • the present invention relates to the use of extruded or melt cast personal washing bars that comprise specific levels and ratios of various fatty acid soaps; optionally one or more added polyols, polymers, organic and inorganic adjuvant materials, electrolytes, benefit agents and other minor ingredients and the remainder of water.
  • extruded or melt cast personal washing bars that comprise specific levels and ratios of various fatty acid soaps; optionally one or more added polyols, polymers, organic and inorganic adjuvant materials, electrolytes, benefit agents and other minor ingredients and the remainder of water.
  • the fatty acid soaps, other surfactants and in fact all the components of the bar should be suitable for routine contact with human skin and preferably yield bars that are high lathering.
  • the bars yield superior lather even when washing in water having high concentration of divalent and monovalent salts.
  • This lather is compared to lather generated by bars formed from same oil base but in which fatty acids have not been tailored as defined. Improvement in lather is greater than about 30%, preferably greater than about 40% compared to bar not meeting limitation (see comparative bar in Example). This is true in either quantitative test defined in protocol or in quantitative SITA® foam test machinery data obtained as also defined in protocol.
  • the soap bar composition providing improved lather comprises fatty acid blend soap preferably in an amount of 30 to 85% by wt. of the soap bar. More preferably, the fatty acid blend comprises a fatty acid blend in an amount of 40 to 80% by wt. of the soap bar. Most preferably, the fatty acid blend comprises a fatty acid blend in an amount of 45 to 78% by wt. of the soap bar.
  • the fatty acid blend comprises one or more surfactants.
  • the preferred type of surfactant is fatty acid soap.
  • the term "soap" is used herein in its popular sense, i. e., the alkali metal or alkanol ammonium salts of aliphatic, alkanes, or alkene monocarboxylic acids.
  • Sodium, potassium, magnesium, mono-, di- and tri-ethanol ammonium cations, or combinations thereof, are the most suitable for purposes of this invention.
  • sodium soaps are used in the compositions of this invention, but up to about 15% of the soap may be potassium, magnesium or triethanolamine soaps.
  • the soaps useful herein are the well known alkali metal salts of natural or synthetic aliphatic (alkanoic or alkenoic) acids having about 8 to about 24 carbon atoms. They may be described as alkali metal carboxylates of saturated or unsaturated hydrocarbons having about 8 to about 24 carbon atoms. Alkali metal salts are preferred.
  • the fatty acid blend is made from fatty acids that may be different fatty acids, typically fatty acids containing fatty acid moieties with chain lengths of from C 8 to C 24 .
  • the fatty acid blend may also contain relatively pure amounts of one or more fatty acids.
  • Suitable fatty acids include, but are not limited to, butyric, caproic, caprylic, capric, lauric, myristic, myristelaidic, pentadecanoic, palmitic, palmitoleic, margaric, heptadecenoic, stearic, oleic, linoleic, linolenic, arachidic, gadoleic, behenic and lignoceric acids and their isomers.
  • the fatty acid blend has fatty acids with fatty acids moiety chains length of 10 (capric acid) and 12 (lauric acid) carbon atoms used in specifically defined ratios. In preferred embodiments, the fatty acid blend has low levels of fatty acid with saturated fatty acid moiety chain length of 14 carbon atoms (myristic acid).
  • the fatty acid blend of the present invention comprises relatively high amounts (i.e. at least 3 %, preferably at least 10% by wt. bar composition) of capric and lauric acids wherein ratio of C 10 to C 12 is in a defined range. More particularly, C 8 to C 14 fatty acids should comprise about 10% to about 32% by wt. of composition (C 14 alone comprises no more than about 3.5% by wt. of composition); C 16 to C 18 long saturated chain should comprise about 15% to 55% by wt. composition; and long unsaturated C 18 (e.g., oleic) should comprise about 25 to 35% by wt. of composition (unsaturated C 18 other than oleic comprises 5% by wt. or less). Together, there criticalities ensure superior lather in high electrolyte water relative to bar with the same oil base where criticalities (e.g., tailoring or designing of chain lengths) are not met.
  • criticalities ensure superior lather in high electrolyte water relative to bar with the same oil
  • the proportion of capric acid to lauric acid ranges from 0.5 to 1 to 1.5 to 1. Preferably, ratio is 0.75 to 1 to 1.25 to 1.
  • the fatty acids may be eventually in the form of free fatty acids, preferably in an amount not higher than 5% of the fatty acid soap blend.
  • the total level of the adjuvant materials used in the bar composition should be in an amount not higher than 50% by wt. of the soap bar composition.
  • Suitable starchy materials which may be used include natural starch (from corn, wheat, rice, potato, tapioca and the like), pregelatinzed starch, various physically and chemically modified starch and mixtures thereof.
  • natural starch starch which has not been subjected to chemical or physical modification - also known as raw or native starch.
  • a preferred starch is natural or native starch from maize (corn), cassava, wheat, potato, rice and other natural sources of it.
  • Raw starch with different ratio of amylose and amylopectin e.g. maize (25% amylose); waxy maize (0%); high amylose maize (70%); potato (23%); rice (16%); sago (27%); cassava (18%); wheat (30%) and others.
  • the raw starch can be used directly or modified during the process of making the bar composition such that the starch becomes gelatinized, either partially or fully gelatinized.
  • starch is pre-gelatinized which is starch that has been gelatinized before it is added as an ingredient in the present bar compositions.
  • Various forms are available that will gel at different temperatures, e.g., cold water dispersible starch.
  • One suitable commercial pre-gelatinized starch is supplied by National Starch Co. (Brazil) under the trade name FARMAL® CS 3400 but other commercially available materials having similar characteristics are suitable.
  • Another organic adjuvant could be a polyol or mixture of polyols.
  • Polyol is a term used herein to designate a compound having multiple hydroxyl groups (at least two, preferably at least three) which is highly water soluble, preferably freely soluble, in water.
  • polyols are available including: relatively low molecular weight short chain polyhydroxy compounds such as glycerol and propylene glycol; sugars such as sorbitol, manitol, sucrose and glucose; modified carbohydrates such as hydrolyzed starch, dextrin and maltodextrin, and polymeric synthetic polyols such as polyalkylene glycols, for example polyoxyethylene glycol (PEG) and polyoxypropylene glycol (PPG).
  • PEG polyoxyethylene glycol
  • PPG polyoxypropylene glycol
  • Especially preferred polyol are glycerol, sorbitol and their mixtures.
  • the level of polyol is critical in forming a thermoplastic mass whose material properties are suitable for both high speed manufacture (300-400 bars per minute) and for use as a personal washing bar. It has been found that when the polyol level is too low, the mass is not sufficiently plastic at the extrusion temperature (e.g., 40o C to 45o C) and the bars tend to exhibit higher mushing and rates of wear. Conversely, when the polyol level is too high, the mass becomes too soft to be formed into bars by high speed at normal process temperature.
  • the bars used in the invention comprise 0.1 to to 15% by wt. polyol.
  • Preferred polyols include glycerol, sorbitol and mixtures thereof.
  • the adjuvant system may optionally include insoluble particles comprising one or a combination of materials.
  • insoluble particles materials that are present in solid particulate form and suitable for personal washing.
  • the insoluble particles should not be perceived as scratchy or granular and thus should have a particle size less than 300 microns, more preferably less than 100 microns and most preferably less than 50 microns.
  • Preferred inorganic particulate material includes talc and calcium carbonate.
  • Talc is a magnesium silicate mineral material, with a sheet silicate structure and a composition of Mg3Si4 (OH)22, and may be available in the hydrated form. It has a plate-like morphology, and is essentially oleophilic/hydrophobic, i.e., it is wetted by oil rather than water.
  • Calcium carbonate or chalk exists in three crystal forms: calcite, aragonite and vaterite.
  • the natural morphology of calcite is rhombohedral or cuboidal, acicular or dendritic for aragonite and spheroidal for vaterite.
  • calcium carbonate or chalk known as precipitated calcium carbonate is produced by a carbonation method in which carbon dioxide gas is bubbled through an aqueous suspension of calcium hydroxide.
  • the crystal type of calcium carbonate is calcite or a mixture of calcite and aragonite.
  • optional insoluble inorganic particulate materials include alumino silicates, aluminates, silicates, phosphates, insoluble sulfates, borates and clays (e.g., kaolin, china clay) and their combinations.
  • Organic particulate materials include: insoluble polysaccharides such as highly crosslinked or insolubilized starch (e.g., by reaction with a hydrophobe such as octyl succinate) and cellulose; synthetic polymers such as various polymer lattices and suspension polymers; insoluble soaps and mixtures thereof.
  • insoluble polysaccharides such as highly crosslinked or insolubilized starch (e.g., by reaction with a hydrophobe such as octyl succinate) and cellulose
  • synthetic polymers such as various polymer lattices and suspension polymers
  • insoluble soaps and mixtures thereof include: insoluble polysaccharides such as highly crosslinked or insolubilized starch (e.g., by reaction with a hydrophobe such as octyl succinate) and cellulose; synthetic polymers such as various polymer lattices and suspension polymers; insoluble soaps and mixtures thereof.
  • Bar compositions preferably comprise 0.1 to 25% by wt. of bar composition, preferably 5 to 15 by wt. of these mineral or organic particles.
  • Bars of the invention comprise 10 to 30% by wt., preferably 13 to 20% by wt. water.
  • the bar compositions can optionally include non-soap synthetic type surfactants (detergents) - so called syndets.
  • Syndets can include anionic surfactants, nonionic surfactants, amphoteric or zwitterionic surfactants and cationic surfactants.
  • the level of synthetic surfactant present in the bar is generally less than 25%, preferably less than 15%, preferably up to 10%, and most preferably from 0 to 7% based on the total weight of the bar composition.
  • the anionic surfactant may be, for example, an aliphatic sulfonate, such as a primary alkane (e.g., C 8 -C 22 ) sulfonate, primary alkane (e.g., C 8 -C 22 ) disulfonate, C 8 -C 22 alkene sulfonate, C 8 -C 22 hydroxyalkane sulfonate or alkyl glyceryl ether sulfonate (AGS); or an aromatic sulfonate such as alkyl benzene sulfonate.
  • Alpha olefin sulfonates are another suitable anionic surfactant.
  • the anionic may also be an alkyl sulfate (e.g., C 12 -C 18 alkyl sulfate), especially a primary alcohol sulfate or an alkyl ether sulfate (including alkyl glyceryl ether sulfates).
  • alkyl sulfate e.g., C 12 -C 18 alkyl sulfate
  • a primary alcohol sulfate e.g., C 12 -C 18 alkyl sulfate
  • alkyl ether sulfate including alkyl glyceryl ether sulfates
  • the anionic surfactant can also be a sulfonated fatty acid such as alpha sulfonated tallow fatty acid, a sulfonated fatty acid ester such as alpha sulfonated methyl tallowate or mixtures thereof.
  • the anionic surfactant may also be alkyl sulfosuccinates (including mono- and dialkyl, e.g., C 6 -C 22 sulfosuccinates); alkyl and acyl taurates, alkyl and acyl sarcosinates, sulfoacetates, C 8 -C 22 alkyl phosphates and phosphates, alkyl phosphate esters and alkoxyl alkyl phosphate esters, acyl lactates or lactylates, C 8 -C 22 monoalkyl succinates and maleates, sulphoacetates, and acyl isethionates.
  • alkyl sulfosuccinates including mono- and dialkyl, e.g., C 6 -C 22 sulfosuccinates
  • alkyl and acyl taurates alkyl and acyl sarcosinates
  • anionics is C 8 to C 20 alkyl ethoxy (1-20 EO) carboxylates.
  • C 8 -C 18 acyl isethionates Another suitable anionic surfactant is C 8 -C 18 acyl isethionates. These esters are prepared by reaction between alkali metal isethionate with mixed aliphatic fatty acids having from 6 to 18 carbon atoms and an iodine value of less than 20. At least 75% of the mixed fatty acids have from 12 to 18 carbon atoms and up to 25% have from 6 to 10 carbon atoms.
  • the acyl isethionate may also be alkoxylated isethionates
  • Acyl isethionates when present, will generally range from about 0.5% to about 25% by weight of the total composition.
  • the anionic component will comprise the majority of the synthetic surfactants used in the bar composition.
  • Amphoteric detergents which may be used in this invention include at least one acid group. This may be a carboxylic or a sulphonic acid group. They include quaternary nitrogen and therefore are quaternary amido acids. They should generally include an alkyl or alkenyl group of 7 to 18 carbon atoms. Suitable amphoteric surfactants include amphoacetates, alkyl and alkyl amido betaines, and alkyl and alkyl amido sulphobetaines.
  • Amphoacetates and diamphoacetates are also intended to be covered in possible zwitterionic and/or amphoteric compounds which may be used.
  • Suitable nonionic surfactants include the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example aliphatic alcohols or fatty acids, with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. Examples include the condensation products of aliphatic (C 8 -C 18 ) primary or secondary linear or branched 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, long chain tertiary phosphine oxides and dialkyl sulphoxides.
  • the nonionic may also be a sugar amide, such as alkyl polysaccharides and alkyl polysaccharide amides.
  • cationic detergents are the quaternary ammonium compounds such as alkyldimethylammonium halides.
  • adjuvants include but are not limited to: perfumes; opacifying agents such as fatty alcohols, ethoxylated fatty acids, solid esters, and TiO 2 ; dyes and pigments; pearlizing agent such as TiO 2 coated micas and other interference pigments; plate like mirror particles such as organic glitters; sensates such as menthol and ginger; preservatives such as dimethyloldimethylhydantoin (Glydant XL1000), parabens, sorbic acid and the like; anti-oxidants such as, for example, butylated hydroxytoluene (BHT); chelating agents such as salts of ethylene diamine tetra acetic acid (EDTA) and trisodium etridronate; emulsion stabilizers; auxiliary
  • the level of pearlizing agent should be between about 0.1% to about 3%, preferably between 0.1% and 0.5% and most preferably between about 0.2 to about 0.4% based on the total weight of the bar composition.
  • a particular class of optional ingredients highlighted here is skin benefit agents included to promote skin and hair health and condition.
  • Potential benefit agents include but are not limited to: lipids such as cholesterol, ceramides, and pseudoceramides; antimicrobial agents such as TRICLOSAN; sunscreens such as cinnamates; other types of exfoliant particles such as polyethylene beads, walnut shells, apricot seeds, flower petals and seeds, and inorganics such as silica, and pumice; additional emollients (skin softening agents) such as long chain alcohols and waxes like lanolin; additional moisturizers; skin-toning agents; skin nutrients such as vitamins like Vitamin C, D and E and essential oils like bergamot, citrus unshiu, calamus, and the like; water soluble or insoluble extracts of avocado, grape, grape seed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, gingko, gins
  • the composition can also include a variety of other active ingredients that provide additional skin (including scalp) benefits.
  • active ingredients include anti-acne agents such as salicylic and resorcinol; sulfur-containing D and L amino acids and their derivatives and salts, particularly their N-acetyl derivatives; anti-wrinkle, anti-skin atrophy and skin-repair actives such as vitamins (e.g., A,E and K), vitamin alkyl esters, minerals, magnesium, calcium, copper, zinc and other metallic components; retinoic acid and esters and derivatives such as retinal and retinol, vitamin B3 compounds, alpha hydroxy acids, beta hydroxy acids, e.g.
  • salicylic acid and derivatives thereof skin soothing agents such as aloe vera, jojoba oil, propionic and acetic acid derivatives, fenamic acid derivatives; artificial tanning agents such as dihydroxyacetone; tyrosine; tyrosine esters such as ethyl tyrosinate and glucose tyrosinate; skin lightening agents such as aloe extract and niacinamide, alpha-glyceryl-L-ascorbic acid, aminotyroxine, ammonium lactate, glycolic acid, hydroquinone, 4 hydroxyanisole, sebum stimulation agents such as bryonolic acid, dehydroepiandrosterone (DHEA) and orizano; sebum inhibitors such as aluminum hydroxy chloride, corticosteroids, dehydroacetic acid and its salts, dichlorophenyl imidazoldioxolan (available from Elubiol); anti-oxidant effects, protease inhibition; skin tightening
  • the soap bars may include 0.5 wt% to 5 wt% electrolyte.
  • Preferred electrolytes include chlorides, sulphates and phosphates of alkali metals or alkaline earth metals. Without wishing to be bound by theory it is believed that electrolytes help to structure the solidified soap mass and also increase the viscosity of the molten mass by common ion effect. Comparative soap bars without any electrolyte were found to be softer.
  • Sodium chloride and sodium Sulphate are the most preferred electrolyte, more preferably at 0.6 to 3.6 wt%, and most preferably at 1.0 to 3.6 wt%.
  • the soap bars may include 0.1 to 5 wt % of a polymer selected from acrylates or cellulose ethers.
  • Preferred acrylates include cross-linked acrylates, polyacrylic acids or sodium polyacrylates.
  • Preferred cellulose ethers include carboxymethyl celluloses or hydroxyalkyl celluloses. A combination of these polymers may also be used, provided the total amount of polymers does not exceed 5 wt%.
  • Preferred bars include 0.1 to 5% acrylates. More preferred bars include 0.15 to 3% acrylates.
  • acrylate polymers include polymers and copolymers of acrylic acid crosslinked with polyallylsucrose as described in US Patent 2,798,053 which is herein incorporated by reference.
  • Other examples include polyacrylates, acrylate copolymers or alkali swellable emulsion acrylate copolymers (e.g., ACULYN® 33 Ex. Rohm and Haas; CARBOPOL® Aqua SF-1 Ex. Lubrizol Inc.), hydrophobically modified alkali swellable copolymers (e.g., ACULYN® 22, ACULYN® 28 and ACULYN® 38 ex.
  • crosslinked homopolymers of acrylic acid include CARBOPOL® 934, 940, 941, 956, 980 and 996 carbomers available from Lubrizol Inc.
  • Other commercially available crosslinked acrylic acid copolymers include the CARBOPOL® Ultrez grade series (Ultrez® 10, 20 and 21) and the ETD series (ETD 2020 and 2050) available from Lubrizol Inc.
  • CARBOPOL® Aqua SF-1 is a particularly preferred acrylate.
  • This compound is a slightly cross-linked, alkali-swellable acrylate copolymer which has three structural units; one or more carboxylic acid monomers having 3 to 10 carbon atoms, one or more vinyl monomers and, one or more mono- or polyunsaturated monomers.
  • Preferred bars include 0.1 to 5% cellulose ethers. More preferred bars include 0.1 to 3% cellulose ethers. Preferred cellulose ethers are selected from alkyl celluloses, hydroxyalkyl celluloses and carboxyalkyl celluloses. More preferred bars include hydroxyalkyl celluloses or carboxyalkyl celluloses and particularly preferred bars include carboxyalkyl cellulose.
  • Preferred hydroxyalkyl cellulose includes hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and ethyl hydroxyethyl cellulose.
  • Preferred carboxyalkyl cellulose includes carboxymethyl cellulose. It is particularly preferred that the carboxymethyl cellulose is in form of sodium salt of carboxymethyl cellulose.
  • Preferred wax includes paraffin wax and microcrystalline wax.
  • preferred bars may include 0.01 to 5 wt% Polyalkyleneglycols, more preferably 0.03 to 3 wt% and most preferably 0.5 to 1 wt%. Suitable examples include polyethyleneglycol and polypropyleneglycol.
  • a preferred commercial product is POLYOX® sold by The Dow Chemical Company.
  • a preferred composition of the invention comprises (by wt.):
  • bars are prepared using mixture of palm oil (PO), palm oil stearine (POS), and palm kernel oil (PKO) and ratio of (PO plus POS) to PKO is 75:25, preferably 60:40.
  • PO palm oil
  • POS palm oil stearine
  • PKO palm kernel oil
  • the invention relates to the use of a bar composition for enhancing lather when washing in high electrolyte containing water which comprises applying to skin or suitable substrate bar compositions as defined above and wherein enhanced lather is relative to bar produced from same types and ratios of oils (e.g., 60:40 (PO plus POS/PKO), but where specific fatty acid blends are not tailored to meet specific criteria defined by this invention.
  • oils e.g. 60:40 (PO plus POS/PKO
  • the increase in foam of bars of the specification is greater than about 30%, preferably greater than about 40% as measured in mL by SITA® foam tester or in quantitative test also defined in protocol, compared to bars outside the invention (e.g., not tailored as defined by invention).
  • the invention relates to of the use of a bar composition for enhancing lather when washing in water having water hardness greater than about 25 French hardness (FH), preferably greater than about 50 French Hardness, more preferably greater than about 75 FH, even more preferably greater than about 100 FH which method comprises applying to skin or other substrate bar compositions defined by compositions of claim 1 wherein enhanced lather is relative to bar product from the same type and ratios of oils but where specific fatty acid blends do not fall with C 10 :C 12 ratios, minimal C 14 amounts and minimal unsaturated C 18 other than oleic amounts defined.
  • FH French hardness
  • the amount of lather generated by a soap bar is an important parameter affecting consumer preference.
  • the lather volume test described herein gives a measure of lather generation under standard conditions, thus allowing objective comparison of different soap formulations.
  • Lather is generated by trained technicians using a standardised method. The lather is collected and its volume measured.
  • Tablet pre-treatment Wearing a surgeon's rubber gloves which have previously been washed in plain soap, wash down all test tablets (e.g., bars) at least 10 minutes before starting the test sequence. This is best done by twisting them about 20 times through 180° (i.e., a half turn) under running water (at about 30°C).
  • ii. Place about 5 litres of water of known hardness and at a specified temperature in a bowl. Typically, water temperature is about 30°C and kept constant for a given series of assessments. Change the water after each bar of soap has been tested.
  • iii. Take up the tablet, dip it in the water and remove it. Twist the tablet 15 times, between the hands, through 180°. Place the tablet on the soap dish.
  • the lather is generated by the soap remaining on the gloves.
  • Stage 1 Rub one hand over the other hand (two hands on same direction) 10 times in the same way.
  • Stage 2 Grip the right hand with the left, or vice versa, and force the lather to the tips of the fingers. This operation is repeated five times.
  • Stages 1 and 2. Place the lather in the beaker.
  • v. Repeat the whole procedure of lather generation from paragraph iii, twice more, combining all the lather in the beaker.
  • vi. Stir the combined lather gently to release large pockets of air. Read and record the volume.
  • Solid moisturizing personal wash bars were prepared with different percentages of fatty acids in accordance with the formulations herein below.
  • the fatty acids used to prepare the formulations are supplied by Cosmoquimica under the commercial Name of Edenor® C8 98/100 (Caprilic acid); Edenor® C10 98/100 (Capric acid); Edenor® C12 98/100 (Lauric acid); Edenor® C14 98/100 (Myristic acid); Edenor® C16 98/100 (Palmitic acid); Edenor® C18 98/100 (Stearic acid); Edenor® C18:1 98/100 (Oleic acid).
  • Table 1 Composition Comparative A (blending conventional oils) Comparative B (blending conventional oils)
  • Example 1 (optimized blending) C 8 caprylic 0.92 1.53 2.00 C 10 capric 0.70 1.32 14.00 C 12 lauric 10.12 19.45 14.00 C 14 myristic 4.15 6.93 2.00 C 14:1 myristelaidic 0.00 0.00 0.00 C 15 pentadecanoic 0.05 0.04 0.00 C 16 palmitic 41.87 29.16 17.00 C 16:1 palmitoleic 0.11 0.10 0.00 C 17 margaric 0.10 0.07 0.00 C 17:1 heptadecenoic 0.00 0.00 0.00 C 18 stearic 5.15 4.25 17.00 C 18:1 oleic 29.61 30.11 32.00 C 18:2 linoleic 6.89 6.73 2.00 C 18:3 linolenic 0.13 0.11 0.00 C 20 arachidic 0.09 0.04 0.00 C 20:1 gadoleic
  • seawater was used for results of Example 1.
  • the example also shows high hardness level (greater than 50, greater than 100) of brackish water in various countries.
  • salt water e.g., sodium ions
  • C 14 chain length being particularly affected.
  • Applicants also took the formulation with optimized blending (Example 1) and diluted the compositions to varying ratios.
  • diluted we mean there is higher amount of longer chain fatty acids which, as we see, would be expected to foam less.
  • the diluted compositions were tested in the laboratory and in a SITA tester and results are set forth below: Table 2 Qualitative Scale (0-10 scale) Appraisal (mL) (Quantitative test) SITA Foam Tester (mL) 80/20 bar, but “designed” to have greater level of shorter chain 4 108 300 "Designed” 70/30 bar 8 197 415 "Designed" 60/40 bar 9 238 425 Conventional 60/40 blend 2 56 275
  • the "designed" bars show superior performance, even when diluted to great extent (80/20). By using greater amount of shorter chain then conventional bars, unexpectedly superior foam is retained.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Detergent Compositions (AREA)
  • Cosmetics (AREA)
  • Lubricants (AREA)

Claims (5)

  1. Verwendung einer Riegelzusammensetzung zur Verbesserung des Schaums beim Waschen in Wasser mit einer Wasserhärte von mehr als etwa 25° französischer Härte, wobei der Riegel umfasst:
    a) 30-90 Gew.-% der Riegelzusammensetzung Alkalimetall- oder Alkanolammoniumsalzfettsäureseife, wobei:
    (i) das Verhältnis von Fettsäureseife von C10-Kettenlänge zu Fettsäureseife von C12-Kettenlänge etwa 0,5:1,0 bis etwa 1,5:1,0 beträgt, wobei Caprin- und Laurinsäuren in einer Menge von mindestens 3 Gew.-% der Riegelzusammensetzung vorliegen;
    (ii) wobei Fettsäure von C14-Kettenlänge 0 bis etwa 3,5 Gew.-% maximal der Riegelzusammensetzung beträgt;
    (iii) wobei die Menge an ungesättigtem C18 etwa 25 bis 35 Gew.-% der Riegelzusammensetzung beträgt; und
    (iv) wobei die Menge an ungesättigter C18-Fettsäure anders als Ölsäure 0 bis etwa 5 Gew.-% maximal der Riegelzusammensetzung beträgt,
    b) etwa 0,1 bis etwa 15 Gew.-% der Riegelzusammensetzung Polyol;
    c) etwa 0,1 bis 25 Gew.-% mineralische oder organische Partikel; und
    d) etwa 10 bis 30 Gew.-% Wasser.
  2. Verwendung einer Riegelzusammensetzung nach Anspruch 1, wobei das Verhältnis von C10 zu C12 etwa 1:1 beträgt.
  3. Verwendung einer Riegelzusammensetzung nach Anspruch 1 oder 2, wobei die Menge an C14 etwa 0,1 bis etwa 3,0 Gew.-% beträgt.
  4. Verwendung einer Riegelzusammensetzung nach irgendeinem der vorhergehenden Ansprüche, wobei das Polyol ausgewählt ist aus der Gruppe bestehend aus Glycol, Sorbit und Mischungen davon.
  5. Verwendung einer Riegelzusammensetzung nach irgendeinem der vorhergehenden Ansprüche, wobei der Riegel aus einer Kombination von Palmöl (PO), Palmölstearin (POS) und Palmkernöl (PKO) hergestellt wird und das Verhältnis von (PO und POS) zu PKO etwa 60:40 bis etwa 80:20 beträgt.
EP15733652.0A 2014-07-22 2015-06-17 Verwendung einer spezifischen seifenstück-zusammensetzung zur verbesserung des schaums in gegenwart von wasser mit hoher elektrolytkonzentration Active EP3172309B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14178075 2014-07-22
PCT/EP2015/063617 WO2016012163A1 (en) 2014-07-22 2015-06-17 Bar composition and methods for maintaining enhanced lather in presence of water with high electrolyte concentration

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EP3172309B1 true EP3172309B1 (de) 2020-10-07

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EP (1) EP3172309B1 (de)
CN (1) CN106574216A (de)
BR (1) BR112017001260B1 (de)
EA (1) EA035754B1 (de)
ES (1) ES2833234T3 (de)
MX (1) MX2017000839A (de)
WO (1) WO2016012163A1 (de)
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BR112021014250A2 (pt) 2019-03-01 2021-09-28 Unilever Ip Holdings B.V. Composição de barra de sabão e uso de composição
WO2020178056A1 (en) 2019-03-01 2020-09-10 Unilever N.V. A soap bar with improved perfume impact and deposition of actives

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Publication number Priority date Publication date Assignee Title
US5540852A (en) * 1995-01-31 1996-07-30 The Procter & Gamble Company Personal cleansing bar with tailored fatty acid soap
US8492323B2 (en) * 2011-11-23 2013-07-23 Conoppo, Inc. Toilet soap with improved lather

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EP3172309A1 (de) 2017-05-31
BR112017001260A2 (pt) 2018-01-30
WO2016012163A1 (en) 2016-01-28
BR112017001260B1 (pt) 2022-06-14
EA035754B1 (ru) 2020-08-05
CN106574216A (zh) 2017-04-19
EA201790006A1 (ru) 2017-08-31
MX2017000839A (es) 2017-05-04
ES2833234T3 (es) 2021-06-14
ZA201700174B (en) 2018-08-29

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