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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/046—Salts
• • 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
• • 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
• • 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
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0065—Solid detergents containing builders
  • C11D17/0069—Laundry bars
• • 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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/10—Carbonates ; Bicarbonates

Definitions

• the present invention relates to a low pH synergistic detergent bar and more particularly the compositions of the invention are especially, but not exclusively, useful for fabric washing providing for superior cleaning benefits and additional benefits in terms of colour care and mildness to the skin.
• the present invention also relates to a method for the cleaning of fabric.
• Fabric washing compositions contain, as an essential ingredient, a surfactant system whose role is to assist in removal of soil from the fabric and its suspension in the wash liquor. It is known that maintaining fabrics' visual appearance over time during repeated wear-wash is not achievable. The main contributory factors are high soil loading, soil redeposition, redistribution, colloid instability of deterged soil, role of hardness ions in rinse, drying and wear, environmental factors, photo degradation in sunlight and washing habits.
• compositions typically comprise, one or more surfactants and a plurality of abrasives dispersed in. Combinations of these together with electrolytes are generally used to form a suspending system as is well known in the art.
• Japanese patent Nos. 60212496 and 60212497 disclosed that a composition comprising of cellulase, acidic compounds (phytic acid) and anionic surfactants (alpha sulpho fatty ester salts etc.) at pH 5.0 in solution gave better detergency when washing dirt-stained socks compared to alkaline detergents.
• cellulase and anionic surfactants JP4306299 (Kao) teaches a tablet type detergent composition based on nonionic surfactants, a crystalline aluminosilicate and a porous oil-absorbing amorphous silica giving alkaline dispersions.
• the composition has sufficiently high strength for transport.
• BR9600063 (Unilever) teaches a non-soap detergent bar containing 10-60% anionic detergent active, 5-60% a detergency builder and over 4% alkoxylated alcohol.
• the anionic surfactant to alkoxylated alcohol weight ratio is 1-12:1.
• Other surfactants may be present as required.
• the bar has improved stability and softness on the skin.
• a low pH synergistic detergent powder for fabric washing consisting of a surfactant system, a mix of non-ionic surfactants selected from fatty alcohol ethoxylate with Ethylene Oxide (EO) of levels E03 to E016; silica; and builder.
• EO Ethylene Oxide
• the pH of the powder is below 7.
• the aforesaid copending application therefore relates to fabric cleaning powder with low pH and high non-ionic surfactants .
• the present invention relates to a low pH synergistic detergent bar composition of pH 4 to 7.0 comprising :
• a surfactant system in an amount of 5 to 50% by wt . of the total composition, said surfactant system comprising 40 to 100% by wt . of the surfactant system of at least one non-ionic surfactant selected from fatty alcohol ethoxylate with Ethylene Oxide (EO) of levels E03 to EO20, optionally in combination with an anionic surfactant; ii. from 10 to 70% by wt . of a structurant; iii. from 5 to 35% by wt . of a pH regulating agent, preferably selected from inorganic acids, organic acids, salts thereof and mixtures of such materials.; iv.
• EO Ethylene Oxide
• the pH of the detergent bar composition is defined as the pH of a 1 % solution in water at 25°C.
• a process for manufacture of low pH synergistic detergent bar comprising mixing the various ingredients in a conventional mixer to form a dough, plodding the dough in an extruder and forming the bar through a die in a conventional manner.
• the surfactant system is preferably present in an amount of between 15 to 25 % by wt . of the total composition.
• the non-ionic surfactant used in the formulation is preferably selected from fatty alcohol ethoxylates with ethylene oxide levels E0 7 to E0 16 .
• the surfactant system can include a co- surfactant such as linear alkyl benzene sulphonate, betaines, sodium lauryl ethoxy sulphate, alpha olefin sulphonate and coco mono ethanol amide and those known to the skilled in the art and generally described in literature, for example in Surface Active Agents and Detergents, Volume II by Schwartz, Perry and Berch (Interscience Publishers, N.Y. 1958).
• a co- surfactant such as linear alkyl benzene sulphonate, betaines, sodium lauryl ethoxy sulphate, alpha olefin sulphonate and coco mono ethanol amide and those known to the skilled in the art and generally described in literature, for example in Surface Active Agents and Detergents, Volume II by Schwartz, Perry and Berch (Interscience Publishers, N.Y. 1958).
• the structurant is preferably selected from alkali metal silicate, china clay, silica, zeolite and mixtures thereof.
• the structurant preferably comprises alkalimetal silicate in the amount of 0.5 to 10% by wt . of the total composition, more preferably, from 1 to 2.5% by wt .
• One especially preferred alkali metal silicate is aluminosilicate .
• the structurant preferably comprises china clay in an amount of 5 to 60% by wt . of the total composition, more preferably 25 to 45% by wt . In many cases it will be very usefull if the structurant comprises silica in an amount of 0 to 15% by wt .
• the structurant comprises silica in an amount of 4 to 8% by wt . of the total composition and/or zeolite in an amount of 4 to 8% by wt . of the total composition.
• a pH regulating agent can be added to provide the necessary pH control.
• the pH regulating agent is present in the bar preferably in an amount of between 10 to 20% by wt .
• Suitable regulating agents are preferably selected from inorganic acids, organic acids, salts thereof and mixtures of such materials.
• Preferred inorganic agents include sodium and potassium bicarbonates, acid pyrophosphates, acid orthophosphates, metaphosphates, bisulfates and boric acid.
• Preferred organic agents include fatty acids, lactic acid, glycolic acid and other derivatives thereof; succinic acid, malonic acid (ethylenedioxy) diacetic acid, maleic acid, diglycollic acid, tartaric acid, tartronic acid and fumaric acid, citric acid, aconitic acid, citraconic acid, carboxymet yloxy succinic acid, lactoxysuccinic acid, and 2-oxa-l-, 1, 3-propane tetracarboxylic acid and 1,1,2,3- propane tetracarboxylic acid; cyclopentane-cis, cis- tetracarboxylic acid, tetracarboxylic acid, 2,5- tetrahydrofuran-cis-cis-dicarboxylic acid, 1,2,3,4,5,6- hexane-hexacarboxylic acid mellitic acid, pyromellitic acid and the phthalic acid derivatives; ethylene diamine tetra (
• the detergent bar further comprises at least one inorganic salt selected from sodium sulphate, sodium chloride, sodium carbonate and like being present in the bar in amounts of between 0 to 50% by wt . and preferably 4 to 10% by wt .
• the low pH synergistic bar of the invention can also include an enzyme, a bleach and other minor ingredients.
• Preferred enzymes comprise lipase (e.g. LipolaseTM) , protease (e.g. SavinaseTM) , amylase and cellulases (e.g. ClazinaseTM) .
• Preferred bleaches comprise sodium sulphite, sodium dithionite, sodium perborate, sodium persulphate, peroxide and the like.
• Minor ingredients comprise perfume, anti redeposition agents, soil release agents, fluorescers and the like.
• the present invention also encompasses a method for the cleaning of fabric comprising the step of contacting fabric with a detergent bar composition according the invention.
• a method for the cleaning of fabric comprising the step of contacting fabric with a detergent bar composition according the invention.
• the same provides for optimal use of selected sequestrants and enzymes in the low pH detergent formulation of the invention for fabric washing incorporating said non-ionic mix surfactant system.
• Detergent bars (Examples I to X) containing LAS, nonionic Surfactant (C ⁇ 2 EO ⁇ 4 ), china clay, aluminium sulphate, sodium tri poly phosphate (STPP) , sodium hexa eta phosphate (SHMP) , alkali silicate and other compounds were manufactured in a conventional plant consisting of a sigma mixer, and plodder.
• Cotton fabric swatches were desized by washing in a detergent solution in the washing machine at 90°C for 1 hour. The swatches were rinsed thrice and dried. A standard composite soil comprising of a mixture of synthetic sebum and particulates was loaded on swatches using a spray method such that the reflectance of the fabric reached 55 ⁇ units at 460 nm. These swatches were soaked in water and then the bar (Examples I to X) was rubbed (-18 rubs) on the fabric and allowed to soak for 10 minutes, followed by scrubbing with a plastic brush ( ⁇ 25 rubs) . The swatches were rinsed well with water.
• the initial reflectance of the soiled fabric was measured at 460 nm. using a Milton Roy Match Scan II.
• the fabric was washed following the protocol described above and the reflectance of the washed fabric was measured.
• the difference in the reflectance of the fabric before and after wash represented as ⁇ R460* gives the detergency benefit .

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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)
• Inorganic Chemistry (AREA)
• Detergent Compositions (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (4)

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Citations (4)

• 1998
  • 1998-12-10 IN IN803BO1998 patent/IN192706B/en unknown
• 1999
  • 1999-11-09 WO PCT/EP1999/007494 patent/WO2000034430A1/en not_active Ceased
  • 1999-11-09 AU AU10336/00A patent/AU1033600A/en not_active Abandoned
  • 1999-12-08 MY MYPI99005335A patent/MY133218A/en unknown

Patent Citations (4)

Non-Patent Citations (1)

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