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
  • C11D1/88—Ampholytes; Electroneutral compounds
  • C11D1/94—Mixtures with anionic, cationic or non-ionic 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
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
  • C11D1/146—Sulfuric acid esters
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/29—Sulfates of polyoxyalkylene ethers
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/662—Carbohydrates or derivatives
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • 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
  • C11D1/75—Amino oxides
• • 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
  • C11D1/88—Ampholytes; Electroneutral compounds
  • C11D1/90—Betaines

Definitions

• the present invention relates to a detergent formulation intended particularly but not exclusively as a so-called "washing-up" liquid for use in washing crockery, cutlery, pans and other domestic utensils which have been used in the preparation and/or consumption of food and which have deposits of food, grease, burnt residues etc.
• GB-A-2 290 301 discloses "washing-up" liquid having good cleaning and lathering performance without the use of LABS (linear alkyl benzene sulphonic acid - usually used as the sodium salt) or diethanolamides (which are associated with nitrosamines).
• LABS linear alkyl benzene sulphonic acid - usually used as the sodium salt
• diethanolamides which are associated with nitrosamines.
• the present invention aims to provide detergent formulations demonstrating improved performance.
• a liquid detergent formulation comprising, by weight, 10-20% of an alkyl (C 8-22 ) sulphate, 1-10% of an alkyl (C 8-22 ) ether sulphate, 1-7% of an amine oxide containing at least one C 8-22 alkyl group, 1-7% of an amphoteric betaine surfactant containing at least one C 8-22 alkyl group, 1 to 15% of an ethoxylated alcohol (C 8-22 ), and a balance of water.
• composition of the invention includes at least one C 8-22 alkyl sulphate used in an amount of 10-20% by weight of the formulation, more preferably 12-18%, even more preferably 15-17%.
• the alkyl sulphate is preferably an alkali metal alkyl sulphate with the preferred alkali metal being sodium.
• the alkyl group of the alkyl sulphate has 8-16 carbon atoms.
• the alkyl sulphate may be a single compound (preferably C 12 ) or may comprise a mixture of alkyl sulphates of different chain lengths, preferably with C 12 predominating.
• the alkyl groups are primary alkyl groups and preferably straight chain.
• the carbon chain of the alkyl sulphate may be produced synthetically or may be derived from natural products (e.g. coconut oil) so that the chain length distribution of the alkyl group will correspond to that in the natural product from which it is derived.
• natural products e.g. coconut oil
• the alkyl sulphate may be a "narrow cut" lauryl sulphate having carbon chains principally of C 12 to C 14 (C 12 predominating), e.g. 60-70% C 12 , 20-30% C 14 plus minor amounts of C 10 and C 16 .
• a preferred alkyl sulphate is available under the name Empicol LX28 (Albright & Wilson).
• the alkyl (C 8-22 ) ether sulphate is preferably used in an amount of 1-5%, e.g. 2-5%.
• the alkyl group of the ether sulphate may be as described for the alkyl sulphate.
• alkyl ether sulphate which may be used is available under the name Empicol 0251 (Albright & Wilson).
• the formulation of the invention contains 1 to 7%, more preferably 1 to 3%, of an amine oxide containing at least one C 8-22 alkyl group.
• the amine oxide preferably has one such group of C 8-22 carbon atoms and two C 1-4 alkyl groups. Most preferably the latter alkyl groups are methyl groups. Preferred amine oxides are therefore (C 8-22 ) alkyl dimethyl amine oxides.
• the long chain alkyl group may, for example, have 8-18 carbon atoms and the compound may comprise a mixture or alkyl groups, which are preferably C 10 to C 18 (with C 12 predominating).
• a suitable amine oxide is available under the name Genaminox CSX (Hoechst).
• the betaine surfactant is used in the formulation of the invention in an amount of 1-7%, more preferably 1-4%.
• Preferred betaines may be either of the formula (I) or (II).
• R 1 and R 2 may be the same or different C 1-4 alkyl groups whereas R 3 is an alkyl group having 8-22 carbon atoms, e.g. mixed C 10 to C 14 .
• the preferred betaine for use in the formulation of the invention is cocoamidopropyl betaine.
• a suitable betaine is available under the name Rewoteric AMB 14 (Witco).
• a further component of the formulation of the invention is the ethoxylated alkanol (C 8-22 ) which is used in an amount of 1-15%, more preferably 6-10%.
• ethoxylated alkanols which may be used are those in which the alkanol (from which the product is derived) is a primary alcohol and is preferably linear.
• the alkanol has 6 to 11 carbon atoms (e.g. mixed C 9 -C 11 ) and in which the degree of ethoxylation is 5-15 (particularly 8-10).
• a suitable fatty alcohol ethoxylate is available under the name Lutensol ON80 (BASF).
• Formulations in accordance with the invention may additionally contain an alkyl (C 8-22 ) polyglycoside which is an acetal of glucose with a primary alcohol (e.g. C 12 -C 14 ). If present, the preferred amount of the alkyl polyglycoside is up to 3%, e.g. 0. 1 to 1.5% by weight.
• alkyl (C 8-22 ) polyglycoside which is an acetal of glucose with a primary alcohol (e.g. C 12 -C 14 ). If present, the preferred amount of the alkyl polyglycoside is up to 3%, e.g. 0. 1 to 1.5% by weight.
• a suitable polyglycoside is available under the name Glucopan 600CSUP (Henkel).
• a further optional component which may be used in the formulation of the invention is a hydrotrope which may be used in an amount up to 4%. e.g. 0.5-2%, of the formulation.
• a particular preferred hydrotrope is sodium xylene sulphonate.
• the formulation may contain the usual minor addition such as preservatives, dyes and/or perfumes.
• Formulations A-D were prepared as shown below.
• Formulation A is generally in accordance with the teachings of GB-A-2 290 301 and is provided for the purposes of comparison.
• Formulations B-D are in accordance with the present invention.
• % by weight A B C D
• the percentages represent amount of active material.
• the above formulations were compared for their effectiveness in washing plates and foaming (lathering) properties.
• the plate washing test was a standard test used to determine the number of plates which could be washed using a predetermined quantity (1.8g) of the detergent formulation.
• the plates had each been soiled with 2 ml of melted lard applied in the form of small drops and then allowed to harden.
• the lathering performance was judged by a standard test in which 200 ml of a 1% solution of the formulation is drained into a measuring cylinder from a separating funnel positioned 75 cm above the base of the cylinder. The height of the lather produced after 1 minute and after 30 minutes was measured.
• Formulations B, C and D were also found to be significantly better at removing burnt on soil after soaking (results not shown).

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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)
• Detergent Compositions (AREA)

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Cited By (7)

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Citations (8)

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• 1997
  • 1997-01-16 GB GB9700803A patent/GB2321253B/en not_active Expired - Fee Related
• 1998
  • 1998-01-06 EP EP98300040A patent/EP0854182A3/de not_active Withdrawn

Patent Citations (8)

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