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
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0021—Dye-stain or dye-transfer inhibiting compositions

Definitions

• the present invention relates to a composition and a process for inhibiting dye transfer between fabrics during washing.
• Suspended or solubilized dyes can to some degree be oxidized in solution by employing known bleaching agents.
• U.S. Patent 4,077,768 describes a process for inhibiting dye transfer by the use of an oxidizing bleaching agent together with a catalytic compound such as iron porphins.
• Copending EP Patent Application 91202655.6 filed October 9, 1991, relates to dye transfer inhibiting compositions comprising an enzymatic system capable of generating hydrogen peroxide and porphin catalysts.
• a dye transfer inhibiting composition which exhibits optimum dye transfer inhibiting properties.
• the invention provides an efficient process for laundering operations involving colored fabrics.
• the present invention relates to inhibiting dye transfer compositions comprising :
• a process is also provided for laundering operations involving colored fabrics.
• the present invention provides a dye transfer inhibiting composition comprising :
• the preferred usage range of the catalyst in the wash is 10- 8 molar to 10- 3 molar, more preferred 10 - 6 - 10- 4 molar.
• the essential metallo porphin structure may be visualized as indicated in Formula I in the accompanying drawings.
• Formula I the atom positions of the porphin structure are numbered conventionally and the double bonds are put in conventionally. In other formula, the double bonds have been omitted in the drawings, but are actually present as in I.
• Preferred metallo porphin structures are those substituted at one or more of the 5, 10, 15 and 20 carbon positions of Formula I (Meso positions), with a phenyl or pyridyl substituent selected from the group consisting of wherein n and m may be 0 or 1; A is selected from water-solubilizing group, e.g., sulfate, sulfonate, phosphate or carboxylate groups; and B is selected from the group consisting of C 1 -C 1 0 alkyl, C 1 -C 10 polyethoxy alkyl and C 1 -C 1 0 hydroxy alkyl.
• Preferred molecules are those in which the substituents on the phenyl or pyridyl groups are selected from the group consisting of
• a particularly preferred metallo phorphin is one in which the molecule is substituted at the 5, 10 15, and 20 carbon positions with the substituent
• This preferred compound is known as metallo tetrasulfonated tetraphenylporphin.
• the symbol X 2 of Formula I represents an anion, preferably OH- or CI-.
• the compound of Formula I may be substituted at one or more of the remaining carbon positions with C 1 -C 1 0 alkyl, hydroxyalkyl or oxyalkyl groups.
• Porphin derivatives also include chlorophyls, chlorines, i.e. isobacterio chlorines and bacterioch- lorines.
• Metallo porphyrin and water-soluble or water-dispersable derivatives thereof have a structure given in formula II.
• X can be alkyl, alkyl carboxy, alkyl hydroxyl, vinyl, alkenyl, alkyl sulfate, alkylsulfonate, sulfate, sulfonate, aryl.
• X 2 of Formula II represents an anion, preferably OH- or CI-.
• the symbol X can be alkyl, alkylcarboxy, alkylhydroxyl, vinyl, alkenyl, alkylsulfate, alkylsulfonate, sulfate, sulfonate.
• Metallo phthalocyanine and derivatives have the structure indicated in Formula III, wherein the atom positions of the phthalocyanine structure are numbered conventionally.
• the anionic groups in the above structures contain cations selected from the group consisting of sodium and potassium cations or other non-interfering cations which leave the structures water-soluble.
• Preferred phthalocyanine derivatives are metallo phthalocyanine trisulfonate and metallo phthalocyanine tetrasulfonate.
• the choice of the substituent groups can be used to control the solubility of the catalyst in water or in detergent solutions. Yet again, especially where it is desired to avoid attacking dyes attached to solid surfaces, the substituents can control the affinity of the catalyst compound for the surface.
• strongly negatively charged substituted compounds for instance the tetrasulfonated porphin, may be repelled by negatively charged stained surfaces and are therefore most likely not to cause attack on fixed dyes, whereas the cationic or zwitterionic compounds may be attracted to, or at least not repelled by such stained surfaces.
• an efficient amount of bleach is by definition the necessary amount of bleach which combined with a bleach catalyst leads to a level of dye oxidation which is between 40% to 100%, preferably 40% to 60%, more preferred 60% to 80%, most preferred 80%-100% of the maximum (Z) per cent of dye oxidation that can be achieved under the most optimal conditions determined by those skilled in the art.
• a washing machine or launderometer add a known bleeding fabric and a known uncolored pick-up tracer (e.g. cotton) to the wash load. After simulating a wash cycle, determine the amount of dye that has been picked up by the tracer according to methods known to those skilled in the art. Now to separate washing machines, add the same amount of bleeding fabric and pick-up tracer, a fixed amount of catalyst and vary the bleach level. Determine the level of dye transfer onto the pick-up tracers and vary the amount of bleach as to minimize dye transfer. In this way the most optimal bleach concentration can be determined.
• a known bleeding fabric and a known uncolored pick-up tracer e.g. cotton
• Suitable hydrogen peroxide bleaching agents are compounds which dissociate or hydrolyse in water to generate hydrogen peroxide.
• hydrogen peroxide releasing agents are hydrogen peroxide, perborates, e.g. perborate monohydrate, perborate tetrahydrate, persulfates, percarbonates, peroxydisulfates, perphosphates and peroxyhydrates.
• Preferred bleaches are percarbonates and perborates.
• compositions are conveniently used as additives to conventional detergent compositions for use in laundry operations.
• the present invention also encompasses dye transfer inhibiting compositions which will contain detergent ingredients and thus serve as detergent compositions.
• a wide range of surfactants can be used in the detergent compositions.
• anionic surfactants are particularly suitable herein, especially mixtures of sulphonate and sulphate surfactants in a weight ratio of from 5:1 to 1:2, preferably from 3:1 to 2:3, more preferably from 3:1 to 1:1.
• Preferred sulphonates include alkyl benzene sulphonates having from 9 to 15, especially 11 to 13 carbon atoms in the alkyl radical, and alpha-sulphonated methyl fatty acid esters in which the fatty acid is derived from a C 12 -Cl8 fatty source preferably from a C 16 -C 18 fatty source.
• the cation is an alkali metal, preferably sodium.
• Preferred sulphate surfactants are alkyl sulphates having from 12 to 18 carbon atoms in the alkyl radical, optionally in admixture with ethoxy sulphates having from 10 to 20, preferably 10 to 16 carbon atoms in the alkyl radical and an average degree of ethoxylation of 1 to 6.
• alkyl sulphates herein are tallow alkyl sulphate, coconut alkyl sulphate, and C14 -15 alkyl sulphates.
• the cation in each instance is again an alkali metal cation, preferably sodium.
• One class of nonionic surfactants useful in the present invention are condensates of ethylene oxide with a hydrophobic moiety to provide a surfactant having an average hydrophilic-lipophilic balance (HLB) in the range from 8 to 17, preferably from 9.5 to 13.5, more preferably from 10 to 12.5.
• HLB hydrophilic-lipophilic balance
• the hydrophobic (lipophilic) moiety may be aliphatic or aromatic in nature and the length of the polyoxyethylene group 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 hydrophilic and hydrophobic elements.
• Especially preferred nonionic surfactants of this type are the C 9 -C 15 primary alcohol ethoxylates containing 3-8 moles of ethylene oxide per mole of alcohol, particularly the C14-C15 primary alcohols containing 6-8 moles of ethylene oxide per mole of alcohol and the C 12 -C14 primary alcohols containing 3-5 moles of ethylene oxide per mole of alcohol.
• Another class of nonionic surfactants comprises alkyl polyglucoside compounds of general formula
• Z is a moiety derived from glucose; R is a saturated hydrophobic alkyl group that contains from 12 to 18 carbon atoms; t is from 0 to 10 and n is 2 or 3; x is from 1.3 to 4, the compounds including less than 10% unreacted fatty alcohol and less than 50% short chain alkyl polyglucosides.
• Compounds of this type and their use in detergent are disclosed in EP-B 0 070 077, 0 075 996 and 0 094 118.
• nonionic surfactants are polyhydroxy fatty acid amide surfactants of the formula wherein R 1 is H, or R 1 is C 1 - 4 hydrocarbyl, 2-hydroxy ethyl, 2-hydroxy propyl or a mixture thereof, R 2 is C s - 31 hydrocarbyl, and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative thereof.
• R 1 is methyl
• R 2 is a straight C11 -15 alkyl or alkenyl chain such as coconut alkyl or mixtures thereof
• Z is derived from a reducing sugar such as glucose, fructose, maltose, lactose, in a reductive amination reaction.
• compositions according to the present invention may further comprise a builder system.
• a builder system Any conventional builder system is suitable for use herein including aluminosilicate materials, silicates, polycarboxylates and fatty acids, materials such as ethylenediamine tetraacetate, metal ion sequestrants such as aminopolyphosphonates, particularly ethylenediamine tetramethylene phosphonic acid and diethylene triamine pentamethylenephosphonic acid.
• phosphate builders can also be used herein.
• Suitable builders can be an inorganic ion exchange material, commonly an inorganic hydrated aluminosilicate material, more particularly a hydrated synthetic zeolite such as hydrated zeolite A, X, B or HS.
• SKS-6 is a crystalline layered silicate consisting of sodium silicate (Na 2 S1 2 0 5 ).
• Suitable polycarboxylates builders for use herein include citric acid, preferably in the form of a water-soluble salt, derivatives of succinic acid of the formula R-CH(COOH)CH2(COOH) wherein R is C10-20 alkyl or alkenyl, preferably C12-16, or wherein R can be substituted with hydroxyl, sulfo sulfoxyl or sulfone substituents.
• lauryl succinate examples include lauryl succinate , myristyl succinate, palmityl succinate2-dodecenylsuccinate, 2-tetradecenyl succinate.
• Succinate builders are preferably used in the form of their water-soluble salts, including sodium, potassium, ammonium and alkanolammonium salts.
• suitable polycarboxylates are oxodisuccinates and mixtures of tartrate monosuccinic and tartrate disuccinic acid such as described in US 4,663,071.
• suitable fatty acid builders for use herein are saturated or unsaturated C10-18 fatty acids, as well as the corresponding soaps.
• Preferred saturated species have from 12 to 16 carbon atoms in the alkyl chain.
• the preferred unsaturated fatty acid is oleic acid.
• Another preferred builder system for liquid compositions is based on dodecenyl succinic acid.
• Preferred builder systems for use in granular compositions include a mixture of a water-insoluble aluminosilicate builder such as zeolite A, and a watersoluble carboxylate chelating agent such as citric acid.
• builder materials that can form part of the builder system for use in granular compositions for the purposes of this invention include inorganic materials such as alkali metal carbonates, bicarbonates, silicates, and organic materials such as the organic phosphonates, amino polyalkylene phosphonates and amino polycarboxylates.
• Suitable water-soluble organic salts are the homo-or co-polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms.
• Polymers of this type are disclosed in GB-A-1,596,756.
• Examples of such salts are polyacrylates of MW 2000-5000 and their copolymers with maleic anhydride, such copolymers having a molecular weight of from 20,000 to 70,000, especially about 40,000.
• Detergency builder salts are normally included in amounts of from 10% to 80% by weight of the composition preferably from 20% to 70% and most usually from 30% to 60% by weight.
• detergent compositions may be employed, such as suds boosting or depressing agents, enzymes and stabilizers or activators therefore, soil-suspending agents soil-release agents, optical brighteners, abrasives, bactericides, tarnish inhibitors, coloring agents, and perfumes.
• enzyme technologies which also provide a type of color care benefit. Examples are cellulase for color maintenance/ rejuvenation.
• These components should preferably be chosen such that they are compatible with the bleach component of the composition.
• the detergent compositions according to the invention can be in liquid, paste or granular forms.
• Granular compositions according to the present invention can also be in "compact form", i.e. they may have a relatively higher density than conventional granular detergents, i.e. from 550 to 950 g/I; in such case, the granular detergent compositions according to the present invention will contain a lower amount of "inorganic filler salt", compared to conventional granular detergents; typical filler salts are alkaline earth metal salts of sulphates and chlorides, typically sodium sulphate; "compact" detergents typically comprise not more than 10% filler salt.
• the present invention also relates to a process for inhibiting dye transfer from one fabric to another of solubilized and suspended dyes encountered during fabric laundering operations involving colored fabrics.
• the process comprises contacting fabrics with a laundering solution as hereinbefore described.
• the process of the invention is conveniently carried out in the course of the washing process.
• the washing process is preferably carried out at 5 ° C to 90 ° C, especially 20 to 60, but the catalysts are effective at up to 95 ° C.
• the pH of the treatment solution is preferably from 7 to 11, especially from 7.0 to 9.0.
• the process and compositions of the invention can also be used as additive during laundry operations.
• the extent of dye oxidation was measured by two different methods: (i) in solution dye bleaching and (2) measurement of the reduction of dye transfer from textile to textile.
• a detergent solution (100 mL) containing dyes (40 ppm final concentration) and the catalyst (1 x 10-5 M) was prepared and its pH value adjusted to 8.0 or 10.
• a liquid dye transfer inhibiting composition according to the present invention is prepared, having the following compositions :
• a compact granular dye transfer inhibiting composition according to the present invention is prepared, having the following formulation:

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• 1992
  • 1992-11-06 EP EP92870184A patent/EP0596187A1/fr not_active Ceased
• 1993
  • 1993-11-03 WO PCT/US1993/010544 patent/WO1994011478A1/fr active Application Filing
  • 1993-11-03 AU AU55906/94A patent/AU5590694A/en not_active Abandoned
  • 1993-11-03 JP JP6512174A patent/JPH08503247A/ja active Pending
  • 1993-11-03 CA CA 2148812 patent/CA2148812A1/fr not_active Abandoned
  • 1993-11-06 CN CN 93112695 patent/CN1088254A/zh active Pending
  • 1993-11-08 MX MX9306968A patent/MX9306968A/es unknown

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