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
  • C11D3/395—Bleaching agents
  • C11D3/3956—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
  • C11D3/50—Perfumes

Definitions

• the present invention relates to a liquid bleaching composition which is suitable both for laundry and household applications.
• Compositions herein are particularly suitable in laundry applications, as a pre-wash bleaching composition.
• Liquid bleaching compositions are well known in the art. Amongst the different bleaching compositions available, those relying on bleaching by hypochlorite are often preferred, mainly for performance reasons. These hypochlorite-based compositions are typically used in dilute form and are suitable both for laundry and household applications. However a major drawback associated with chlorine-based compositions is the malodor they generate during and after use. Indeed, not only does the composition itself smell chlorine bleach, but the malodor remains noticeable on fabrics or surfaces which have been treated with said compositions, as well as on the skin of the user of the composition, even after the bleaching composition has been thoroughly rinsed away. Formulators have tried to solve that problem by designing perfumed chlorine-based bleaching compositions. However, this has proved difficult mainly for two reasons.
• a chlorine-based bleaching composition suitable for use in diluted form could be formulated, which exhibits a reduced chlorine odor upon use, by adding a buffering means, i.e., a carbonate salt at a level of 0.2% to 5% by weight of a total composition and/or a silicate salt at a level of 0.02% to 3% by weight to an aqueous bleaching composition comprising an alkali metal hypochlorite (2%-10%) and a bleach stable perfume and being formulated at a pH of from 11.5 to 14.
• a buffering means i.e., a carbonate salt at a level of 0.2% to 5% by weight of a total composition and/or a silicate salt at a level of 0.02% to 3% by weight
• an aqueous bleaching composition comprising an alkali metal hypochlorite (2%-10%) and a bleach stable perfume and being formulated at a pH of from 11.5 to 14.
• WO 88/05461 discloses a bleaching composition comprising sodium hypochlorite, sodium carbonate and sodium hydroxide
• US 4 287 079 discloses aqueous cleaning compositions to be applied from squirt bottle comprising a particulate abrasive, a two part thickener consisting essentially of a mixture of fumed silicon dioxide and smectite clay, an aqueous hypohalite bleach solution, an alkaline builder and perfume like isobornylacetate. Said compositions are suitable for cleaning hard surfaces, no laundry application is disclosed.
• GB-A-2 076 010 discloses thickened aqueous bleach compositions comprising an alkali metal hypochlorite, one or more carboxylated surfactants, metal hydroxide, electrolytes such as calcium carbonate and perfume. Said compositions are suitable for cleaning vertical and inclined surfaces, no laundry application is disclosed.
• EP-A-30 401 discloses liquid thickened chlorine bleaching compositions having a pH of from 10 to 12.5 and comprising hypochlorite, a buffering means like alkali metal salts of carbonic acid and of silicilic acid, perfume and a thickening system, i.e. a mixture of two different detergent active compounds. Said compositions are useful for bleaching hard surfaces, no laundry application is disclosed.
• EP-A-204 472 discloses a thickened aqueous cleaning composition
• a thickened aqueous cleaning composition comprising a specific tertiary amino oxide and an alkali metal or alkaline earth metal mono-or polyalkylated benzene or naphthalene sulphonate in which the alkyl groups contain from 1 to 4 carbon atoms.
• Said compositions may further comprise hypochlorite, metal hydroxide, alkali metal carbonate and perfume like isobornylacetate dihydroter pincol, dihydroterpinyl acetate and isoborneol.
• Alkali metal carbonate may be present as a contaminant of commercially available hypochlorite solution at a level of from 0.01% to 0.1% by weight of the hypochlorite solution.
• Said compositions are suitable for cleaning non-horizontal structural surfaces, no laundry application is disclosed.
• US 4 235 732 discloses alkaline aqueous hypochlorite cleaning compositions containing paraffin sulphonate surfactant, an inorganic colloid-forming clay, insoluble particulate abrasive, an inorganic alkaline salt capable of maintaining the composition pH within the range of from about 10 to 14 and perfume.
• Different bleaching applications are disclosed including bleaching of textiles.
• US 3 876 551 discloses aqueous perfumed compositions (pH 12 to 13.5) containing an alkali metal hypochlorite, a stable perfume oil and a surface active agent consisting solely of an amine oxide composition which consists essentially of one or more morpholine and/or dimethyl C 11 -C 13 straight chain alkyl amine oxides. No pH buffering means are disclosed. Said compositions are suitable for laundry and domestic bleaching.
• EP-A-186 386 discloses an aqueous composition and having a pH above 12, comprising sodium hypochlorite, perfume, optical brighteners and amine oxides. No pH buffering means are disclosed. Said compositions are suitable for laundry applications.
• the present invention encompasses an aqueous liquid bleaching composition suitable for use in diluted form, said composition having a pH as is of from 11.5 to 14 and comprising:
• the present invention further encompasses a method of bleaching and washing fabrics or surfaces, when said fabrics or surfaces are contacted with a composition according to the present invention.
• compositions according to the present invention are aqueous bleaching compositions.
• they comprise hypochlorite in an aqueous matrix.
• alkali metal hypochlorite Various forms of alkali metal hypochlorite are commercially available and, although this is not critical for the present invention, it is preferred herein to use sodium hypochlorite.
• Compositions according to the present invention comprise a bleaching amount of alkali metal hypochlorite, which represents from 2% to 10% by weight of the total composition, based on active chlorine, of alkali metal hypochlorite.
• Preferred compositions herein comprise from 3% to 6% of alkali metal hypochlorite.
• compositions according to the present invention have a pH as is of from 11.5 to 14, preferably from 12.5 to 14. Suitable means to achieve such a pH value include potassium and sodium hydroxide.
• compositions according to the present invention are suitable for use in diluted form.
• the expression "use in diluted form” herein includes dilution by the user, which occurs for instance in household application or hand laundry applications, as well as dilution by other means, such as in a washing machine. Typical dilution levels are of from 0.5% to 20% for hand laundry application, 0.1% to 10% in a washing machine, and 0.5 to 20% for household application.
• the pH of the composition as is changes, i.e. decreases, to a certain pH value which is hereinafter referred to as the pH of the diluted composition.
• the pH of the diluted composition is buffered to a substantially constant value throughout use, i.e. from the moment the dilution is completed and until the hypochlorite bleaching composition is started to be rinsed away.
• composition according to the present invention comprise pH buffering means whereby the pH of the diluted composition remains constant throughout use.
• the pH buffering mean used herein is silicate salt at a level of from 0.02% to 3% and/or carbonate salt at a level of from 0.2% to 5% by weight of the total composition.
• Particularly useful are alkali metal salts of silicate and carbonate, preferably sodium silicate and sodium carbonate, both of which are commercially available, or mixtures thereof.
• Preferred compositions herein use a mixture of sodium carbonate and sodium silicate.
• Preferred composition herein comprise from 0.2% to 5% by weight of the total composition of sodium carbonate, preferably from 0.5% to 3%, and from 0.02% to 3% by weight of the total composition of sodium silicate, preferably from 0.04% to 3%.
• the compositions according to the present invention comprise a bleach stable perfume, whereby said perfume causes no more than 10% loss of available chlorine in 5 days at 50°c, preferably not more than 8% loss of available chlorine.
• a bleach stable perfume whereby said perfume causes no more than 10% loss of available chlorine in 5 days at 50°c, preferably not more than 8% loss of available chlorine.
• most perfume ingredients are incompatible for use in a strong oxidizing environment such as hypochlorite bleaching compositions.
• the hypochlorite attacks the perfume, resulting not only in the degradation of the perfume but also in the loss of available chlorine, thus bleaching power.
• Perfumes useful for use herein do not cause loss of available chlorine outside the limits described hereinabove.
• the capacity of a perfume to meet this criteria is evaluated by comparing a composition with the perfume to a composition without, to account for the loss of available chlorine which is not due to the perfume.
• the available chlorine is measured in the fresh compositions, i.e. just after they are made, and in the same compositions after 5 days storage at 50 °c, using the method described for instance in "Analyses des Eaux et Extraits de Javel” by Latica syndicalerance de L'eau de Javel et des building connexes, Pages 9-10 (1984). The % loss of available chlorine is then calculated.
• perfume it is meant herein individual perfume components as well as mixtures thereof.
• Bleach stable perfumes for use herein are components in the class of acetals, aldehydes, esters, alcohols, ketones, ethers, nitriles, terpenes, as well as miscellaneous materials, including materials of natural origin.
• suitable acetals components include 1,2,3,4,6,7,8-octahydro 2,3,8,8- tetramethyl -2 acetal naphtalene, available from IFF under the trade name Iso E Super®, octane 1,1-dimethoxy acetal, commercially available from Dragoco under the trade name Resedyl Acetal®, 1,3-dioxane 2,4,6-trimethyl 4-phenyl acetal, commercially available from Dragoco under the trade name Vertacetal®, 1,3-dioxolane 2-hexyl acetal, commercially available from Dragoco under the trade name Ylamone®, phenylacetaldehyde dimethyl acetal, aldehyde dimethyl acetal, citral diethyl acetal, and acetaldehyde phenyl ethyl propyl acetal.
• Suitable perfume components within the class of esters include dihydro terpinyl acetate, tetrahydro linalyl acetate, benzene propanoltrimethyl acetate, commercially available from Dragoco under the trade name Vetikol Acetate®, ortho tertiary butyl cyclohexanol acetate, ortho tertiary amyl cyclohexanyl acetate, Fenchyl acetate, Iso bomyl acetate, styrallyl acetate.
• Suitable perfume components within the class of alcohols are 4-tert-butylcyclohexanol, dihydro terpineol, tetrahydro geraniol, tetrahydro myrcenol, tetrahydro linaleol, fenchyl alcohol, dimethyl octanol, 2,5-dimethyl heptan-2-ol, commercially available from IFF under the trade name Dimetol®, phenyl methyl ethyl carbinol, dimethyl benzyl carbinol, dimethyl phenyl ethyl carbinol.
• Suitable perfume components from the class of ketones are Menthone, Iso menthone racemic, dimethyl octanone, Fenchone-1,1,3-trimethyl bicyclo-1,2,2-heptanone 2, benzophenone.
• Suitable perfume components from the class of ehters include monoterpenes and cyclic monoterpenes ethers, commercially available from Givaudan Roure under the trade name Lime Oxide®, diphenyl oxide, iso amyl phenyl ethyl ether, paracrasyl methyl ether, phenyl ethyl methyl ether, beta naphtol methyl ether, methyl diphenyl ether.
• Suitable perfume components in the class of nitriles are 3-cyclopentane 2,2,3-trimethyl 1-acetonitrile, commercially available from Dragoco under the trade name Cantryl®, bicyclo [2.2.1] heptane-2 carbonitrile, commercially available from Dragoco under the trade name Romaryl®, 5-phenyl-3-methyl-pentaneacid nitrile, dodecanenitrile, tetrahydro geranyl nitrile.
• Suitable terpenes as perfume components herein are para cymene and terpinolene.
• Suitable materials of natural origin include essential oils and resins such as eucalyptus oil, cistus oil, patchouli oil.
• compositions according to the present invention typically comprise from 0.000002% to 2% by weight of the total composition of said perfume, preferably from 0.000005% to 0.5 %.
• compositions according to the present invention further comprise a bleach-stable perfume solubilizer, i.e. a surface active ingredient which helps the homogeneization or solubilization of the perfume in the composition.
• a bleach-stable perfume solubilizer i.e. a surface active ingredient which helps the homogeneization or solubilization of the perfume in the composition.
• Suitable bleach-stable perfume solubilizers include amine oxides, alkyl ethoxy methyl carboxylates, alkyl phenyl ethoxy methyl carboxylates, diphenyl oxide sulphonates, sarcosinates, taurates, betaines, quaternary ammonium salts, sulphates, sulphonates, and mixtures thereof.
• compositions according to the present invention typically comprise from 0.000001% to 20% by weight of the total composition of a perfume solubilizer, preferably from 0.000002% to 5%.
• the present invention further encompasses a method of bleaching fabrics which comprises the steps of first contacting said fabrics with an aqueous liquid bleaching composition suitable for use in diluted form, having a pH as is of from 11.5 to 14 and comprising:
• a composition of pH 13.1 is prepared which contains 5% available chlorine, 0.7% sodium hydroxide, 1% sodium carbonate, 0.02% benzophenone, 0.02% nonyl phenyl ethoxy(7) methyl carboxylate and water up to 100%.
• the loss of available chlorine is the same with and without benzophenone and amounts to about 14% loss of available chlorine in 5 days at 50°c.
• a composition of pH 13.2 is prepared which contains 5% available chlorine, 0.7% sodium hydroxide, 1% sodium carbonate, 1.0% sodium silicate, 0.03% tetrahydromyrcenol, 0.04% nonyl phenyl ethoxy(7) methyl carboxylate, and water up to 100%.
• the loss of available chlorine is the same with and without tetrahydromercenol and amounts to about 14% loss of available chlorine in 5 days at 50°c.
• a composition of pH 13.2 is prepared which contains 5% available chlorine, 0.8% sodium hydroxide, 1% sodium carbonate, 0.03% tetrahydrolynalool, 0.07% nonyl ethoxy(5) methyl carboxylate and water up to 100%.
• the loss of available chlorine is the same with and without tetrahydrolynalool and amounts to about 16% loss of available chlorine in 5 days at 50°c.
• a composition of pH 13.0 is prepared which contains 5% available chlorine, 0.7% sodium hydroxide, 1% sodium silicate, 0.03% fenchylacetate, 0.08% nonyl ethoxy(5) methyl carboxylate, and water up to 100%.
• the loss of available chlorine is the same with and without fenchylacetate and amounts to about 16% loss of available chlorine in 5 days at 50°c.
• a composition of pH 13.2 is prepared which contains 5% available chlorine, 0.8% sodium hydroxide, 1% sodium carbonate, 0.03% ortho tertiary amyl cyclohexanyl acetate, 0.1% diphenyl oxide, and water up to 100%.
• the loss of available chlorine is the same with and without fenchylacetate and amounts to about 16% loss of available chlorine in 5 days at 50°c.
• a composition of pH 13.0 is prepared which contains 5% available chlorine, 0.7% sodium hydroxide, 1% sodium silicate, 0.03% eucaliptol, 0.04% nonyl phenyl ethoxy(7) methyl carboxylate, and water up to 100%.
• the loss of available chlorine is the same with and without fenchylacetate and amounts to about 16% loss of available chlorine in 5 days at 50°c.

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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)
• Cosmetics (AREA)

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• 1993
  • 1993-04-26 ES ES93870070T patent/ES2127267T3/es not_active Expired - Lifetime
  • 1993-04-26 EP EP93870070A patent/EP0622451B1/de not_active Revoked
  • 1993-04-26 DE DE69322375T patent/DE69322375T2/de not_active Expired - Fee Related
  • 1993-04-26 DK DK93870070T patent/DK0622451T3/da active
  • 1993-04-26 EP EP98870103A patent/EP0867503A3/de not_active Withdrawn
  • 1993-04-26 AT AT93870070T patent/ATE174054T1/de not_active IP Right Cessation

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