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
  • C11D1/66—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
  • 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
  • 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

Definitions

• the present application relates to the technical field of cleaning hard surfaces. It refers to a viscous bleach composition, comprising at least one bleach compound and at least two surfactants. Said composition has a high viscosity but is free of any thickeners.
• Respective cleaning agents are usually liquid and are applied as a spray to the area from which the dirt shall be removed.
• a respective spray distributes the active agent, namely surfactant and bleach and/or enzyme homogenously to a quite large area.
• the disadvantage is, that the liquid stays on the surface to be cleaned only if the surface is flat.
• the liquid runs down the wall and there is only little contact between the soil and the cleaning agent. A longer contact time would increase the cleaning efficiency.
• a liquid comprising a bleaching agent as a spray, it usually splashes and thus, the risk occurs that clothes by the user or other surfaces near by the area to be cleaned are somehow damaged by the liquid bleach product.
• a viscous bleach composition having a viscosity of at least 10,000 mPas at 20 °C, said composition comprising at least one bleach compound in an amount from 0.3 % as to 1.7 % as, at least two surfactants, said surfactants being selected from anionic surfactant, nonionic surfactant, zwitterionic surfactant, ampholytic surfactant, and cationic surfactant, the total amount of surfactant being within the range of from 2 % as to 20 % as, said composition being free of thickeners.
• a composition of the present invention therefore eases the cleaning of vertical surfaces and no areas such as grout and increases safety concerns associated with liquid bleach products e. g. splash or damaging fabrics or other surfaces near by the area to be cleaned. All amounts of surfactants and bleach compound are in % as (% active substance), if not explicitly stated different.
• the bleach composition according to the present invention has a viscosity of at least 10,000 mPas at 20 °C.
• the viscosity is at least 12,000 mPas, especially at least 15,000 mPas, especially preferred at least 17,000 mPas, preferred at least 20,000 mPas, all at 20 °C.
• the viscosity was measured using a Brookfiled Viscosimeter DV2T with Spindle number 31.
• the composition comprises at least one bleach compound in an amount of from 0.3 % as to 1.7 % as.
• the amount of the bleach composition is preferably at least 0.3 % as, especially at least 0.4 % as, preferably at least 0.5 % as especially preferred at least from 0.6 % as, preferably at least 0.65 % as, especially at least 0.7 % as and preferred at least 0.75 % as. It is shown that these amounts of bleach compounds are sufficient to obtain the jelly bleach composition with the above-mentioned viscosity.
• the amount of active bleach compound shall not exceed 1.7 % as. Preferably, it is 1.6 % as or less, especially 1.5 % as or less, preferred 1.4 % as or less, preferably 1.3 % as or less, especially preferred 1.25 % as or less.
• the composition according to the present invention further comprises at least two surfactants, which are different from each other.
• the surfactants are selected from anionic surfactant, nonionic surfactant, zwitterionic surfactant, ampholytic surfactant and cationic surfactant.
• Within the scope of the present application is therefore a combination of for example two anionic surfactants, two nonionic surfactants, two zwitterionic surfactants etc.
• the composition comprises at least one anionic surfactant and at least one nonionic surfactant.
• the total amount of surfactant is within a range of from 2 % as to 20 % as. Surprisingly it was found that these relatively low amounts of total surfactant are sufficient to provide good cleaning performance together with the above-mentioned amount of bleach compound. At the same time, this range of surfactants enables a stable high viscous bleach composition, without the need of any thickeners. Preferably, the composition is also free of salts, which would also work as thickeners.
• the composition comprises at least two surfactants, wherein at least one surfactant is an anionic surfactant and the other is at least one nonionic surfactant.
• the amount of anionic surfactant is in this preferred embodiment within a range of from 1 % as to 10 % as, preferably from 2 % as to 9 % as, in some embodiments it is from 3 % as to 8 % as, preferably from 2 % as to 8 % as, especially from 4 % as to 7 % as or from 5 % as to 6 % as, especially it is from 3 % as to 5 % as or from 4 % as to 6 % as.
• this amount of anionic surfactants enables the production of a viscous bleach composition with a high viscosity.
• Such jelly composition enables an improved handling together with improved security for the user.
• the amount of the nonionic surfactant is within a range of from 1 % as to 10 % as, preferably from 2 % as to 9 % as, in some embodiments it is from 3 % as to 8 % as, preferably from 2 % as to 8 % as, especially from 4 % as to 7 % as or from 5 % as to 6 % as, especially it is from 3 % as to 5 % as or from 4 % as to 6 % as.
• the present application refers to viscous bleach composition having a viscosity of at least 10,000 mPas at 20 °C, said composition comprising at least one bleach compound in an amount from 0.3 by weight to 1.7 % as, at least two surfactants, wherein at least one surfactant is an anionic surfactant and at least one surfactant is an nonionic surfactant, the total amount of surfactant being within the range of from 2 % as to 20 % as, the amount of the anionic surfactant being within a range of from 1 % as to 10 % as in the amount of the nonionic surfactant being also within the range of from 1 % as to 10 % as, said composition being free of thickeners.
• This composition enables the production of a stable jelly viscous bleach composition with high viscosity at room temperature.
• the ratio of the amount of the at least one anionic surfactant to the at least one nonionic surfactant is preferably within a range from 1:1 to 2:1, especially from 1:1 to 1.5 :1.
• the ration of the total amount of surfactant to the amount of bleach compound is preferably within a range from 40:1 to 5:1, especially from 30:1
• Suitable bleach compounds are those known for the person skilled in the art.
• it is selected from alkali or earth alkali salt of hypochlorous acid.
• it is sodium hypochlorite.
• Sodium hypochlorite is known to have a high bleaching activity. At the same time handling in the production is manageable also on the safety aspects.
• Suitable surfactants which can be used according to embodiments of the present invention are described in the following: Sulfonates and/or sulfates may preferably be used as the anionic surfactant.
• the anionic surfactant content is from about 1% to about 10% as and preferably from about 2 % to about 8 % as, each based on 100% of the total bleach composition.
• Preferred surfactants of the sulfonate type include C 9-13 alkylbenzene sulfonates, olefin sulfonates, i.e., mixtures of alkene and hydroxyalkane sulfonates as well as disulfonates such as those obtained, for example, from C 12-18 monoolefins with terminal or internal double bonds by sulfonation with gaseous sulfur trioxide and subsequent alkaline or acidic hydrolysis of the sulfonation products.
• esters of ⁇ -sulfofatty acids for example, the ⁇ -sulfonated methyl esters of hydrogenated coconut fatty acids, palm kernel fatty acids or tallow fatty acids.
• the alkali salts and in particular the sodium salts of the sulfuric acid hemiesters of the C 12-C18 fatty alcohols for example, those from coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol or C 10 -C 25 oxo alcohols and the hemiesters of secondary alcohols of these chain lengths are preferred as the alk(en)yl sulfates.
• the C 12 -C 16 alkyl sulfates and the C 12 -C 15 alkyl sulfate as well as the C 14 -C 15 alkyl sulfates are preferred.
• 2,3-alkyl sulfates are suitable anionic surfactants.
• the anionic surfactant is a polyethoxylated alcohol sulfate, such as those sold under the trade name CLAFOAM® 303 (Pilot Chemical Company, California).
• Such materials also known as alkyl ether sulfates (AES) or alkyl polyethoxysulfates, correspond to the following formula (I) R'-O-(C 2 H 4 O) n -SO 3 M' wherein R' is a C 8 -C 20 alkyl group, n is from 1 to 20, and M' is a salt-forming cation; preferably, R' is C 10 -C 18 alkyl, n is from 1 to 15, and M' is sodium, potassium, ammonium, alkylammonium, or alkanolammonium.
• AES alkyl ether sulfates
• R' is a C 12 -C 16 alkyl, n is from 1 to 6, and M' is sodium.
• the alkyl ether sulfate is sodium lauryl ether sulphate (SLES) and n is from 1 to 4. In a preferred embodiment, the alkyl ether sulfate is SLES and n is 2.
• Unethoxylated alkyl sulfates may also be added separately to the liquid compositions of this invention.
• Suitable unalkoxylated, e.g., unethoxylated, alkyl ether sulfate surfactants are those produced by the sulfation of higher C 8 -C 20 fatty alcohols.
• Conventional primary alkyl sulfate surfactants have the general formula of: ROSO 3 M, wherein R is typically a linear C 8 -C 20 hydrocarbyl group, which may be straight chain or branched chain, and M is a water-solubilizing cation; preferably R is a C 10 -C 15 alkyl, and M is alkali metal. In one embodiment, R is C 12 -C 14 and M is sodium.
• the anionic surfactant is a water soluble salt of an alkyl benzene sulfonate having between 8 and 22 carbon atoms in the alkyl group.
• the anionic surfactant comprises an alkali metal salt of C 10-16 alkyl benzene sulfonic acids, such as C 11-14 alkyl benzene sulfonic acids.
• the alkyl group is linear and such linear alkyl benzene sulfonates are known in the art as "LAS.”
• Other suitable anionic surfactants include sodium and potassium linear, straight chain alkylbenzene sulfonates in which the average number of carbon atoms in the alkyl group is between 11 and 14.
• Sodium C 11 -C 14 e.g., LAS is one suitable anionic surfactant for use herein.
• the composition comprises 2-phenyl alkylbenzene sulfonate.
• Suitable anionic surfactants include soaps. Suitable examples include saturated and unsaturated fatty acid soaps, such as the salts of lauric acid, myristic acid, palmitic acid, stearic acid, (hydrogenated) erucic acid and behenic acid as well as in particular salt mixtures derived from natural fatty acids, for example, coconut, palm kernel, olive oil or tallow fatty acids.
• the anionic surfactants as well as the soaps may be present in the form of their sodium, potassium or magnesium or ammonium salts.
• the anionic surfactants are preferably present in the form of their ammonium salts.
• Preferred counterions for the anionic surfactants are the protonated forms of choline, triethylamine, monoethanolamine or methyl ethyl amine.
• one of the at least two surfactants is an alkylene sulfofatty acid salt (also referred to herein as an ⁇ -sulfofatty acid ester), such as a methylester sulfonate (MES) of a fatty acid (e.g., palm oil-based MES).
• MES methylester sulfonate
• a sulfofatty acid is typically formed by esterifying a carboxylic acid with an alkanol and then sulfonating the ⁇ -position of the resulting ester.
• the ⁇ -sulfofatty acid ester is typically of the following formula (II): wherein R 1 is a linear or branched alkane, R 2 is a linear or branched alkane, and R 3 is hydrogen, a halogen, a mono-valent or di-valent cation, or an unsubstituted or substituted ammonium cation.
• R 1 can be a C 4 to C 24 alkane, including a C 10 , C 12 , C 14 , C 16 , and/or Cis alkane.
• R 2 can be a C 1 to C 8 alkane, including a methyl group.
• R 3 is typically a mono-valent or di-valent cation, such as a cation that forms a water soluble salt with the ⁇ -sulfofatty acid ester (e.g., an alkali metal salt such as sodium, potassium, or lithium).
• the ⁇ -sulfofatty acid ester of formula (I) can be a methyl ester sulfonate, such as a C 16 methyl ester sulfonate, a Cis methyl ester sulfonate, or a mixture thereof.
• the ⁇ -sulfofatty acid ester is a salt, which is generally of the following formula (III): wherein R 1 and R 2 are alkanes and M is a monovalent metal.
• R 1 can be an alkane containing 4 to 24 carbon atoms, and is typically a C 8 , C 10 , C 12 , C 14 , C 16 , and/or Cis alkane.
• R 2 is typically an alkane containing 1 to 8 carbon atoms, and more typically a methyl group.
• M is typically an alkali metal, such as sodium or potassium.
• the ⁇ -sulfofatty acid ester of formula (II) can be a sodium methyl ester sulfonate, such as a sodium C 8 -C 18 methyl ester sulfonate.
• surfactants suitable for use in preparing the present compositions include additional anionic surfactants, nonionic surfactants, zwitterionic surfactants, ampholytic surfactants, and cationic surfactants.
• Suitable nonionic surfactants include polyalkoxylated alkanolamides, which are generally of the following formula (IV): wherein R 4 is an alkane or hydroalkane, R 5 and R 7 are alkanes and n is a positive integer.
• R 4 is typically an alkane containing 6 to 22 carbon atoms.
• R5 is typically an alkane containing 1-8 carbon atoms.
• R 7 is typically an alkane containing 1 to 4 carbon atoms, and more typically an ethyl group.
• the degree of polyalkoxylation typically ranges from about 1 to about 100, from about 3 to about 8, or from about 5 to about 6.
• R 6 can be hydrogen, an alkane, a hydroalkane group, or a polyalkoxylated alkane.
• the polyalkoxylated alkanolamide is typically a polyalkoxylated mono- or di-alkanolamide, such as a C 16 and/or Cis ethoxylated monoalkanolamide, or an ethoxylated monoalkanolamide prepared from palm kernel oil or coconut oil.
• suitable nonionic surfactants include alkoxylated fatty alcohols, alkoxylated fatty acid alkyl esters, fatty acid amides, alkoxylated fatty acid amides, polyhydroxy fatty acid amides, alkyl phenol polyglycol ethers, amine oxides, alkyl polyglucoside and mixtures thereof.
• the nonionic is an amine oxide, especially an alkyl amine oxide (R 1 R 2 R 3 NO).
• alkyl amine oxides dimethyl alkyl amine oxides are preferred.
• R 1 and R 2 are methyl groups.
• R 3 is an alkyl chain with a chain length of 10 to 16 C-atoms. Suitable compounds are for example obtainable under the tradename Dehyton TL from BASF SE, Germany.
• Alkoxylated, advantageously ethoxylated, in particular primary alcohols preferably with 8 to 18 carbon atoms and an average of 4 to 12 mol ethylene oxide (EO) per mol alcohol are preferably used as the nonionic surfactant, in which the alcohol moiety is linear or may preferably be methyl-branched in position 2 and/or may contain linear and methyl-branched moieties in the mixture such as how they are usually present in oxo alcohols radicals.
• alcohols ethoxylates with linear radicals from alcohols of native origin with 12 to 18 carbon atoms, for example, from coconut, palm and tallow fatty or oleyl alcohol and an average of 5 to 8 EO per mol alcohol are preferred in particular.
• the preferred ethoxylated alcohols include, for example, C 12-14 alcohols with 4 EO or 7 EO, C 9-11 alcohol with 7 EO, C 13-15 alcohols with 5 EO, 7 EO or 8 EO, C 12-18 alcohols with 5 EO or 7 EO and mixture thereof.
• the stated degrees of ethoxylation are statistical averages which may be a whole number or a fraction for a specific product.
• Preferred alcohol ethoxylates have a narrow homolog distribution (narrow range ethoxylates, NRE).
• fatty alcohols with more than 12 EO may also be used. Examples of these include tallow fatty alcohol with 14 EO, 25 EO, 30 EO or 40 EO.
• Nonionic surfactants containing EO and PO groups together in the molecule can also be used as contemplated herein.
• a mixture of a (more strongly) branch ethoxylated fatty alcohol and an unbranched ethoxylated fatty alcohol such as, for example, a mixture of a C 16-18 fatty alcohol with 7 EO and 2-propylheptanol with 7 EO.
• the first composition contains a C12-18 fatty alcohol with 7 EO, a C 13-15 oxo alcohol with 7 EO and/or a C 13-15 oxo alcohol with 8 EO as a nonionic surfactant.
• nonionic surfactants include those containing an organic hydrophobic group and a hydrophilic group that is a reaction product of a solubilizing group (such as a carboxylate, hydroxyl, amido, or amino group) with an alkylating agent, such as ethylene oxide, propylene oxide, or a polyhydration product thereof (such as polyethylene glycol).
• a solubilizing group such as a carboxylate, hydroxyl, amido, or amino group
• an alkylating agent such as ethylene oxide, propylene oxide, or a polyhydration product thereof (such as polyethylene glycol).
• nonionic surfactants include, for example, polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenyl ethers, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene sorbitol fatty acid esters, polyalkylene glycol fatty acid esters, alkyl polyalkylene glycol fatty acid esters, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyalkylene castor oils, polyoxyalkylene alkylamines, glycerol fatty acid esters, alkylglucosamides, alkylglucosides, and alkylamine oxides.
• the composition is substantially free of nonylphenol nonionic surfactants. In this context, the term "substantially free" means less than about one weight percent.
• the nonionic surfactant is an ethoxylated nonionic surfactant.
• the ethoxylated nonionic surfactant is an aliphatic primary alcohol ethoxylate.
• the ethoxylated nonionic surfactant is an aliphatic secondary alcohol ethoxylate.
• the alcohol ethoxylates are the condensation products of an organic aliphatic or alkyl aromatic hydrophobic compound and hydrophilic ethylene oxide groups. The length of the polyetheneoxy chain can be adjusted to achieve the desired balance between the hydrophobic and hydrophilic elements.
• the nonionic surfactant class includes the condensation products of a higher alcohol (e.g., an alkanol containing 8 to 16 carbon atoms in a straight or branched chain configuration) condensed with 4 to 20 moles of ethylene oxide, for example, lauryl or myristyl alcohol condensed with 16 moles of ethylene oxide (EO), tridecanol condensed with 6 to moles of EO, myristyl alcohol condensed with 10 moles of EO per mole of myristyl alcohol, the condensation product of EO with a cut of coconut fatty alcohol containing a mixture of fatty alcohols with alkyl chains varying from 10 to 14 carbon atoms in length and wherein the condensate contains either 6 moles of EO per mole of total alcohol or 9 moles of EO per mole of alcohol, and tallow alcohol ethoxylates containing 6 EO to 11 EO per mole of alcohol.
• a higher alcohol e.g., an alkanol
• the ethoxylated alcohol is a higher aliphatic, primary alcohol containing 9-15 carbon atoms, such as C 9 -C 11 alkanol condensed with 4 to 10 moles of ethylene oxide, C 12 -C 15 alkanol condensed with 12 moles ethylene oxide (for example, NEODOL 25-12 (Shell Chemicals, Netherlands)), C 14 -C 15 alkanol condensed with 13 moles ethylene oxide (for example, NEODOL 45-13 (Shell Chemicals, Netherlands)), or a C 12 -C 14 alkanol condensed with 2, 3, 4, 7, 9, or 10 moles of ethylene oxide.
• C 9 -C 11 alkanol condensed with 4 to 10 moles of ethylene oxide for example, NEODOL 25-12 (Shell Chemicals, Netherlands)
• C 14 -C 15 alkanol condensed with 13 moles ethylene oxide for example, NEODOL 45-13 (Shell Chemicals, Netherlands)
• Ethoxylated alcohols containing 9-15 carbon atoms have an HLB (hydrophobic lipophilic balance) value of 8 to 15 and give good oil-in-water emulsification, whereas ethoxylated alcohols with HLB values below 7 contain less than 4 ethylene oxide groups and tend to be poor emulsifiers and poor detergents.
• HLB hydrophobic lipophilic balance
• Additional satisfactory water soluble alcohol ethylene oxide condensates are the condensation products of a secondary aliphatic alcohol containing 8 to 18 carbon atoms in a straight or branched chain configuration condensed with 5 to 30 moles of ethylene oxide.
• Examples of commercially available nonionic detergents of the foregoing type are C 12 -C 14 secondary alkanol condensed with either 9 EO (TERGITOLTM 15-S-9 (Dow Chemical Company, Michigan, United States)) or 12 EO (TERGITOLTM 15-S-12 (Dow Chemical Company, Michigan, United States)).
• the ethoxylated alcohol is a C 12 -C 14 alkanol condensed with 7 moles of ethylene oxide. In some embodiments, the ethoxylated alcohol is a C 12 -C 15 ethoxylated alcohol condensed with 7 moles of ethylene oxide. In some embodiments, the ethoxylated alcohol is NEODOL 25-7 (Shell Chemicals, Netherlands).
• Suitable zwitterionic surfactants can be broadly described as derivatives of secondary and tertiary amines, derivatives of heterocyclic secondary and tertiary amines, or derivatives of quaternary ammonium, quaternary phosphonium or tertiary sulfonium compounds, such as those disclosed in U.S. Pat. No. 3,929,678 , which is incorporated by reference herein.
• composition according to the present invention may also comprise further ingredients such as for example pH stabilizing agents, perfumes, bleach stabilizers, and/or dyes.
• further ingredients such as for example pH stabilizing agents, perfumes, bleach stabilizers, and/or dyes.
• Respective compounds and maybe also other additives are known for the skilled person. Again, it is to be noted that no thickener is present and against all expectations it is nevertheless possible to obtain a bleach composition with high viscosity.

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Citations (4)

• 2019
  • 2019-05-22 EP EP19176014.9A patent/EP3741835A1/de not_active Withdrawn

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