Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3947—Liquid compositions
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/06—Phosphates, including polyphosphates
  • C11D3/062—Special methods concerning phosphates

Definitions

• the present invention relates to bleaching compositions, and relates particularly to bleaching compositions which can be used on fabrics either by direct application of the composition to the fabric or as a wash additive
• Sodium hypochlorite is a powerful oxidising agent, which can decolourise a very large number of coloured compounds found in soils but which has significant limitations. Many consumers prefer not to use chlorine-based bleach compounds due the characteristic and pungent smell of chlorine.
• wash additives based on hydrogen peroxide and other peroxides for laundry applications are well known These generally comprise a surfactant, a peroxygen bleaching agent and a metal sequestering agent.
• WO 9314183 (P&G: 1992) relates to a stable colourless detergent composition of pH 4-11 which comprises:
• anionic or nonionic surfactant (which can be a nonionic surfactant)
• a metal sequestering agent which can be sodium pyrophosphate or a DEQUEST(TM) type sequestering agent.
• an aqueous bleaching composition of pH 1-3 which comprises:
• the invention also provides a process for removing stains from textile articles which comprises the step of treating the articles with a composition as described herein.
• compositions according to the present invention invariably comprise at least 0.5%wt of disodium dihydrogen pyrophosphate (otherwise known as sodium acid pyrophosphate) and have a pH in the range 1-3.
• disodium dihydrogen pyrophosphate otherwise known as sodium acid pyrophosphate
• pH in the range 1-3.
• the other components present are subject to some variability as to their precise nature and are discussed in further detail below.
• compositions according to the present invention comprise 2-8%wt of surfactant on product.
• a broad range of surfactants and surfactant combinations can be used in the compositions of the invention.
• Surfactants can be nonionic, anionic, cationic, amphoteric or zwitterionic provided that they, and where appropriate their counter- ions, do not react substantially with any peroxide compounds present.
• Preferred surfactants are selected from nonionic surfactants, anionic surfactants and mixtures thereof .
• Suitable nonionic detergent active compounds can be broadly described as compounds produced by the condensation of alkylene oxide groups, which are hydrophillic in nature, with an organic hydrophobic compound which may be aliphatic or alkyl aromatic in nature.
• the length of the hydrophillic or polyoxyalkylene radical which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophillic and hydrophobic elements.
• Particular examples include the condensation product of aliphatic alcohols having from 8 to 22 carbon atoms in either straight or branched chain configuration with ethylene oxide, such as a coconut oil ethylene oxide condensate having from 2 to 10 moles of ethylene oxide per mole of coconut alcohol; condensates of alkylphenols whose alkyl group contains from 6 to 12 carbon atoms with 2 to 10 moles of ethylene oxide per mole of alkylphenol.
• the preferred alkoxylated alcohol nonionic surfactants are ethoxylated alcohols having a chain length of C12-C15 and an EO value of at least 2 but less than 10.
• Particularly preferred nonionic surfactants include the condensation products of Cj , alcohols with 3-9 moles of ethylene oxide.
• An example of a suitable surfactant is ' Dobanol 25 7EO' (TM, ex. Shell) a Cj , alcohol with seven moles of ethoxy1atIon.
• the amount of nonionic detergent active to be employed in the composition of the invention will generally be from 0.1 to 15%wt, preferably from 0.1 to 10%wt, and most preferably from 4 to 10%wt .
• a mixed nonionic surfactant system which comprises two nomonics one of which has a relatively high HLB and the other of which has a relatively low HLB.
• this combination of noniomcs forms a stable emulsion.
• An example of a suitable system is one which comprises 2-5%wt each of two C12-C15 alcohols ethoxylated with 2-4 and 6-8 moles of ethylene oxide respectively.
• Two suitable noniomcs are Dobanol 25 7E0 [TM] ex. Shell and Dobanol 25 3E0 [TM] ex. Shell.
• Alternative surfactants include amine oxides, amines and/or ethoxylates thereof. Amine oxides with a carbon chain length of C12-C14 are particularly preferred.
• Suitable anionic detergent active compounds are water- soluble salts of organic sulphuric reaction products having in the molecular structure an alkyl radical containing from 8 to 22 carbon atoms, and a radical chosen from sulphonic acid or sulphur acid ester radicals and mixtures thereof.
• Suitable anionic detergents are sodium and potassium alcohol sulphates, especially those obtained by sulphating the higher alcohols produced by reducing the glycerides of tallow or coconut oil; sodium and potassium alkyl benzene sulphonates such as those m which the alkyl group contains from 9 to 15 carbon atoms; sodium and potassium secondary alkanesulphonates; sodium alkyl glyceryl ether sulphates, especially those ethers of the higher alcohols derived from tallow and coconut oil; sodium coconut oil fatty acid monoglyceride sulphates; sodium and potassium salts of sulphuric acid esters of the reaction product of one mole of a higher fatty alcohol and from 1 to 6 moles of ethylene oxide; sodium and potassium salts of alkyl phenol ethylene oxide ether sulphate with from 1 to 8 units of ethylene oxide molecule and in which the alkyl radicals contain from 4 to 14 carbon atoms; the reaction product of fatty acids esterified with isethionic acid
• the preferred water-soluble synthetic anionic detergent active compounds are the alkali metal (such as sodium and potassium) and alkaline earth metal (such as calcium and magnesium) salts of higher alkyl benzene sulphonates and mixtures with olefmsulphonates and higher alkyl sulphates, and the higher fatty acid monoglyceride sulphates.
• the most preferred anionic detergent active compounds are higher alkyl aromatic sulphonates (LAS) such as higher alkyl benzene sulphonates containing from 6 to 20 carbon atoms in the alkyl group in a straight or branched chain, particular examples of which are sodium salts of higher alkyl benzene sulphonates or of higher-alkyl toluene, xylene or phenol sulphonates, alkyl naphthalene sulphonates, ammonium diamyl naphthalene sulphonate, and sodium dmonyl naphthalene sulphonate.
• LAS higher alkyl aromatic sulphonates
• the most preferred anionics also include the higher alcohol sulphates (also known as alkyl sulphates) containing from 6 to 20 carbon atoms in the alkyl group m a straight or branched chain, particular examples of which are sodium salts of higher primary alkyl sulphates (PAS) .
• higher alcohol sulphates also known as alkyl sulphates
• PAS sodium salts of higher primary alkyl sulphates
• the amount of synthetic anionic detergent active to be employed in the detergent composition of this invention will generally be from 0.1 to 15%, preferably from 1 to 5%wt, with levels of l-2%wt being particularly preferred.
• compositions contain an amount of both the anionic and the nonionic detergent active.
• total surfactant content lies in the range 0.1-10%wt.
• the weight ratio of anionic detergent to nonionic detergent active may vary and will depend on their nature but is preferably in the range of from 1:9 to 9:1, ideally from 1 : 4 to 4 : 1.
• a particularly suitable surfactant system comprises 1-2% alkyl benzene sulphonate and 0.5-2%wt C12-15, 5-8 EO ethoxylated alcohol nonionic, a suitable alternative surfactant system 8785 PC17EP97/03059
• Suitable peroxy compounds for inclusion in compositions according to the invention include, hydrogen peroxide, perborates, persulphates, peroxysulphates, perphosphates, periodates, percarbonates and mixtures thereof. Particularly preferred materials are hydrogen peroxide, sodium peroxide, peracetic acid, performic acid and mono- persulphate salts. Hydrogen peroxide is most preferred.
• compositions according to the present invention comprise 5-10%wt hydrogen peroxide
• compositions according to the present invention comprise l-7%wt, more preferably l-2%wt disodium dihydrogen pyrophosphate. This material is otherwise known as sodium acid pyrophosphate.
• compositions according to the present invention comprise 0.1-0.5%wt of at least one metal ion complexing agent other than disodium dihydrogen pyrophosphate,
• cleaning and/or disinfecting compositions according to the invention will further comprise metal ion sequestrants such as ethylene-diamine-tetra-acetates, amino-polyphosphonates (such as those in the DEQUEST (TM) range) and phosphates and a wide variety of other poly- functional organic acids and salts, can also optionally be employed.
• metal ion sequestrants such as ethylene-diamine-tetra-acetates, amino-polyphosphonates (such as those in the DEQUEST (TM) range) and phosphates and a wide variety of other poly- functional organic acids and salts, can also optionally be employed.
• Preferred metal ion sequesterants are selected from dipicolinic acid, ethylene diamine tetra acetic acid (EDTA) and its salts, hydroxy-ethylidene diphosphonic acid (Dequest 2010, RTM), ethylene diamine tetra (methylene phosphonic acid) (Dequest 2040, RTM), diethylene triamine penta (methylene phosphonic acid) (Dequest 2060, RTM), amino tri (methylene phosphonic acid) (Dequest 2000, RTM) .
• EDTA ethylene diamine tetra acetic acid
• the phosphonic acid derivatives are particularly preferred.
• Diethylene triamine penta methylene phosphonic acid
• RTM diethylene triamine penta
• the level of phosphonic acid derivative metal ion complexing agent should fall into the range 0.1-3%wt, with levels of 0.1-0.5%wt being particularly preferred.
• Perfume is an optional component of the present invention but is highly preferred.
• Preferred compositions according to the present invention comprise 0.1-0.2%wt of perfume.
• a wide range of perfumes can be employed provided that the perfume is sufficiently stable in the composition.
• compositions according to the present invention are liquids, they can be water-thin or thickened. Thickened compositions are advantageous in that they cling to sloping surfaces and find particular utility in toilet cleaners. Slight thickening of the composition is desirable for applications in which the composition is sprayed, so as to reduce the extent to which small droplets are produced which might otherwise cause respiratory irritation to the user.
• Suitable thickening agents include amine oxide and soap and systems based on nonionic surfactants.
• the compositions are no significantly thickened.
• compositions according to the invention can also contain, in addition to the ingredients already mentioned, various other optional ingredients such as, colourants, optical brighteners, soil suspending agents, gel-control agents, freeze-thaw stabilisers and opacifiers.
• various other optional ingredients such as, colourants, optical brighteners, soil suspending agents, gel-control agents, freeze-thaw stabilisers and opacifiers.
• the pH of compositions according to the invention is in the range 1.5-2.5.
• the pH of compositions according to the invention can be regulated using acids, preferably HC1 and alkali's, preferably NaOH.
• compositions were made up using materials as identified in table 1.
• compositions were prepared by mixing the compounds as indicating below in a stirring tank at room temperature. No particular order of addition is required, although it is preferred that the perfume and any dyestuff are added last.

Landscapes

• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (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)

Applications Claiming Priority (3)

Publications (1)

Family

ID=4064554

Family Applications (1)

Country Status (12)

Families Citing this family (4)

Family Cites Families (7)

• 1996
  • 1996-06-20 BR BR9602854A patent/BR9602854A/pt not_active Application Discontinuation
• 1997
  • 1997-06-10 BR BR9709908A patent/BR9709908A/pt not_active Application Discontinuation
  • 1997-06-10 AU AU33380/97A patent/AU724373B2/en not_active Ceased
  • 1997-06-10 HU HU9903642A patent/HUP9903642A3/hu unknown
  • 1997-06-10 CA CA002255809A patent/CA2255809A1/en not_active Abandoned
  • 1997-06-10 TR TR1998/02605T patent/TR199802605T2/xx unknown
  • 1997-06-10 PL PL97330729A patent/PL330729A1/xx unknown
  • 1997-06-10 WO PCT/EP1997/003059 patent/WO1997048785A2/en not_active Application Discontinuation
  • 1997-06-10 EP EP97929172A patent/EP0906391A2/en not_active Ceased
  • 1997-06-19 IN IN367BO1997 patent/IN189792B/en unknown
  • 1997-06-19 ZA ZA975422A patent/ZA975422B/xx unknown
  • 1997-06-20 AR ARP970102717A patent/AR007433A1/es unknown
  • 1997-06-30 ID IDP972130A patent/ID18683A/id unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events