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
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/50—Solvents
  • C11D7/5004—Organic solvents
  • C11D7/5022—Organic solvents containing oxygen
• • 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
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
  • C11D17/0013—Liquid compositions with insoluble particles in suspension
• • 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
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2075—Carboxylic acids-salts thereof
  • C11D3/2082—Polycarboxylic acids-salts thereof
• • 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
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2075—Carboxylic acids-salts thereof
  • C11D3/2086—Hydroxy carboxylic acids-salts thereof
• • 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
  • C11D3/43—Solvents

Definitions

• the present invention relates to hard-surface cleaning compositions containing a binary mixture of an organic solvent and a narrowly defined organic chelating agent.
• European Patent Applications 0 040 882, 0 080 749, 0 126 545 describe the use of solvents represented by mixtures of terpenes with benzyl alcohol or butyl carbitol, together with builders which are mainly polyphosphates, or nitrogen containing strong sequestrants like NTA.
• EP 0 105 863 and U.S. Patent 3,591,510 describe the use of certain glycol ether derivatives as solvents in liquid cleansers, together with polyphosphate builders.
• the present invention is based on the discovery that certain known chelating agents, when combined with a specific class of organic solvents, provide very good results in terms of soil-removal from hard surfaces, because of unexpected and beneficial chelant/solvent interaction, said known chelating agents being safe compounds constituted solely of carbon, hydrogen, and oxygen.
• Carboxymethyltartronic acid has been described as detergency builder in U.S. Patent 3,865,755, and in DE-OS-2 549 741.
• Oxydisuccinic acid and carboxymethyloxysuccinic acid are known in the same functionality, from U.S. 3,635,830, and 3,692,685.
• Tetrahydrofuran tetracarboxylic acid is known as phosphate replacement builder from U.S. 3,580,852.
• Diglycolic acid is known as sequestering agent in detergent compositions, from DE-OS 2 150 325.
• the invention relates to hard-surface cleaning compositions containing a binary mixture of organic solvent having a boiling point equal to or above 90°C, and an organic chelating agent containing neither phosphorous nor nitrogen, such chelating agents being selected from compounds having the formulae (I) to (VII) hereinafter described, or mixtures of compounds (I) to (VII).
• the chelating agents for use in the present invention are hydrocarbon compounds which do not contain phosphorous or nitrogen, and where the chelating ability is provided by carboxylate groups.
• the chelating agents which can be used in the context of the present invention are selected from the group of: compounds of the formula (I) wherein R1 to R1 are selected independently from the group of: H, COOM, CH3, CH2CH3, CH2COOM, CH2OH, CH(OH)COOM, C2H5, C3H7, OH; n is O or an integer from 1 to 3; and m is O or an integer from 1 to 4.
• compounds of the formula (II) wherein X is - O - or - CH2 T1 to T9 are selected independently from the group of: H, COOM, CH3, CH2CH3, CH2COOM, CH2OH, OH; and p is 0, 1, or 2.
• M is H or an alkalimetal ion such as Na or K.
• the compounds of formula (I) preferably contain at least two carboxylate groups.
• m and n are preferably 0 or 1. Most preferably, n and m are zero in formula (I), and such category includes oxydiacetic acid (R1 to R4 are hydrogen, R11 is -COOH), carboxymethyltartronic acid (R1, R2, R3 are H, R4 and R11 are -COOH), oxydimalonic acid (R1 to R4 and R11 are COOH), carboxymethyloxysuccinic acid (R1, R2, R3 are hydrogen, R4 is CH2COOH, R11 is -COOH), tartrate monosuccinic acid (R1 is H, R2 is CH(OH)COOH, R4 is CH2COOM, R11 is -COOH, R3 is H), oxydisuccinic acid (R1 and R3 are H and R2 and R4 are CH2COOH R11 is -COOH).
• tartrate disuccinic acid R1, R3, R5, R7 are H, R2 and R3 are -CH2COOH, R6, R8 and R11 are -COOH
• Ethylene glycol dimalonate R1, R3, R5, R6, R7, R8 are H, R2 and R3 are -CH2COOH, R11 is -COOH
• p is preferably O and T7 preferably -COOM; such compounds include derivatives of tetrahydrofuran, when X is oxygen, and substituted cyclopentane, when X is -CH2.
• T1 to T6 are H
• T2 and T4 are -COOM
• T1, T3, T5, T6 are H
• Another alternative is represented by tetrahydrofurantetracarboxylic acids wherein T1 and T6 are -COOM, and T2 to T5 are H.
• Suitable substituted cyclopentanes include cyclopentane tetracarboxylic acid (T2 and T4 are -COOM, T1, T3, T5, T6 are H).
• Such chelating agents include 2-oxa-bicyclo(2.2.1) heptane (1,4,5) tricarboxylic acid, 2-oxa-bicyclo(2.2.1)heptane(4,5,6)tricarboxylic acid.
• the compounds of formula (V) contain at least a carboxy group, either directly attached to the benzene ring, or comprised in an alkyl substituent of said benzene ring.
• a preferred species is represented by mellitic acid, wherein B1 to B6 are COOM.
• the chelating agents of the invention are present at levels of from 1% to 20% of the total composition, preferably 2% to 10%.
• the compounds of formula (VI) and (VII) are hydroxypropanedioic acid and dihydroxypropanedioic acid.
• the organic solvents suitable for use in combination with the above-described chelating agents must have a boiling point equal to or above 90°C, in order to give the unexpected soil-release benefits derivable from the solvent-chelating agent combination.
• C1-C3 aliphatic alcohols like isopropanol (B.P. 82°C) are not suitable for use in the present invention.
• organic solvents which are effective in the present context are: C6-C9 alkyl aromatic solvents, especially the C6-C9 alkyl benzenes, alpha-olefins, like 1-decene or 1-dodecene, benzyl alcohol, n-hexanol, phthalic acid esters.
• a type of solvent especially suitable for the compositions herein comprises diols having from 6 to 16, preferably 8 to 12, carbon atoms in their molecular structure.
• Preferred diol solvents have a solubility in water of from about 0.1 to about 20 g/100 g of water at 20°C.
• the most preferred diol solvents are 2,2,4-trimethyl-1,3-pentanediol, and 2-ethyl-1,3-hexanediol.
• Glycol ethers are another class of particularly preferred solvents.
• water-soluble CARBITOL® solvents are compounds of the 2-(2-alkoxyethoxy)ethanol class wherein the alkoxy group is derived from ethyl, propyl, butyl pentyl hexyl; a preferred water-soluble carbitol is 2-(2-butoxyethoxy)ethanol also known as butyl carbitol. Preferred are also hexyl carbitol and 2-methyl pentyl carbitol.
• Water-soluble CELLOSOLVE® solvents are compounds of the 2-alkoxyethoxy ethanol class, wherein the alkoxy group is preferably butyl or hexyl.
• Mixtures of the above solvents can also be used, like Butyl carbitol and/or Benzyl alcohol together with diols and/or glycol ethers.
• the organic solvent is present at level of from 1% to 20% by weight of the total composition, preferably from 1% to 10%.
• compositions are derived from the combination of the specific organic chelating agents and organic solvents described hereinabove.
• the weight ratio or organic solvent to chelating agent is in the range from 2/3 to 2/1, preferably 1/1 to 2/1.
• Combinations of e.g. the preferred chelating agents of formula (I) with 2-(2-butoxy-1-methylethoxy)propanol, or with 2,2,4-trimethyl-1,3-pentane diol in a ratio in the preferred 1/1 to 2/1 range have been found to be particularly effective.
• compositions of the invention can contain additional ingredients, which are often highly desirable.
• compositions herein will usually contain a surface-active agent.
• Water-soluble detersive surfactants useful herein include well-known synthetic anionic, nonionic, cationic, amphoteric and zwitterionic surfactants and mixtures thereof. Typical of these are the alkyl benzene sulfates and sulfonates, paraffin sulfonates, olefin sulfonates, alkoxylated (especially ethoxylated) alcohols and alkyl phenols, amine oxides, sulfonates of fatty acids and of fatty acid esters, and the like, which are well-known in the detergency detersive art.
• such derivative surfactants contain an alkyl group in the C10-C18 range; the anionic detersive surfactants are most commonly used in the form of their sodium, potassium or triethanolammonium salts.
• the nonionics generally contain from 3 to 17 ethylene oxide groups per mole of hydrophobic moiety.
• Cationic surfactants will generally be represented by quaternary ammonium compounds such as ditallow dimethyl ammonium chloride, and will be preferably used in combination with nonionic surfactants.
• compositions of the present invention are: C12-C16 alkyl benzene sulfonates, C12-C18 paraffin-sulfonates and the ethoxylated alcohols of the formula RO(CH2CH2O) n , with R being a C12-C15 alkyl chain and n being a number from 6 to 10 and C12-C18 ethoxylated alcohol sulfates of formula RO-(CH2CH2O) n -SO3M.
• Anionic surfactants are frequently present at levels from 0.3% to 8% of the composition.
• Nonionic surfactants are used at levels between 0.1% to 6% by weight of the composition. Mixtures of the like surfactants can also be used.
• detergency builders which may be used in addition to the chelating agent herein; compounds classifiable and well-known in the art as detergent builders include the nitrilotriacetates (NTA), polycarboxylates, citrates, water-soluble phosphates such as tri-polyphosphate and sodium ortho- and pyro-phosphates, silicates, ethylene diamine tetraacetate (EDTA), amino-polyphosphonates (DEQUEST), phosphates and mixtures thereof.
• NTA nitrilotriacetates
• EDTA ethylene diamine tetraacetate
• DEQUEST amino-polyphosphonates
• Highly desirable ingredients for use herein are represented by conventional detergent hydrotropes.
• suitable hydrotropes are urea, monoethanolamine, diethanolamine, triethanolamine and the sodium potassium, ammonium and alkanol ammonium salts of xylene-, toluene-, ethylbenzene- and isopropyl-benzene sulfonates.
• the hard-surface cleaning compositions of the invention may also contain an abrasive material.
• the abrasives suitable herein are selected from water-insoluble, non-gritty materials well-known in the literature for their relatively mild abrasive properties. It is highly preferred that the abrasives used herein not be undesirably "scratchy". Abrasive materials having a Mohs hardness in the range of about 7, or below, are typically used; abrasives having a Mohs hardness of 3, or below, can be used to avoid scratches on aluminum or stainless steel finishes.
• Suitable abrasives herein include inorganic materials, especially such materials as calcium carbonate and diatomaceous earth, as well as materials such as Fuller's earth, magnesium carbonate, China clay, attapulgite, calcium hydroxyapatite, calcium orthophosphate, dolomite and the like.
• the aforesaid inorganic materials can be qualified as "strong abrasives”.
• Organic abrasives such as urea-formaldehyde, methyl methacrylate melamine-formaldehyde resins, polyethylene spheres and polyvinylchloride can be advantageously used in order to avoid scratching on certain surfaces, especially plastic surfaces.
• abrasives typically have a particle size range of 10-1000 microns and are used at concentrations of 5% to 30% in the compositions. Thickeners are frequently added to suspend the abrasives.
• Thickeners will preferably be included in the compositions of the inventions, mainly in order to suspend the abrasive; high levels of thickener are detrimental to the performance because they are difficult to rinse from the cleaned surfaces. Accordingly, the level will be kept under 2%, preferably from 0.2% to 1.5%.
• Common thickeners such as the polyacrylates, xanthan gums, carboxymethyl celluloses, swellable smectite clays, and the like, can be used herein.
• Soaps can be included in the compositions herein, the soaps prepared from coconut oil fatty acids being preferred.
• Optional components are also represented by ingredients typically used in commercial products to provide aesthetic or additional product performance benefits.
• Typical ingredients include perfumes, dyes, optical brighteners, soil suspending agents, detersive enzymes, gel-control agents, thickeners, freeze-thaw stabilizers, bactericides, preservatives, and the like.
• the hard-surface cleaning compositions herein will advantageously be executed in the form of an aqueous liquid compositions, including concentrates, containing as essential ingredients a surface-active agent, and the solvent/chelating agent binary mixture according to the invention.
• Liquid executions at normal dilution usually contain 2-6% surfactant and 8-12% solvent/chelating agent binary mixture.
• Concentrated liquid executions usually contain 6-10% surfactant and 16-24% solvent/chelating agent binary mixture.
• compositions herein will be in the form of a creamy scouring cleanser, containing an abrasive material, surface-active agent, and the solvent/chelating agent binary mixture of the invention.
• the pH of such compositions will be neutral or in the alkaline range, generally in the range of ph 5-11.
• liquid hard surface cleaning compositions according to the invention are prepared.
• Examples III and V are concentrates, in accordance with one execution of the present invention.
• compositions prepared in accordance with Examples I to XX show very good performance in terms of kitchen and bathroom soil removal from hard surfaces, especially calcium soap soil removal from bathtub surfaces.
• composition containing isopropanol as solvent and CMTA as builder was found to be less efficient in terms of soil-removal properties, thus showing the criticality of the boiling point parameter used to select the solvents useful herein.

Landscapes

• 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)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Detergent Compositions (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Applications Claiming Priority (4)

Publications (2)

Family

ID=26292102

Family Applications (1)

Country Status (7)

Cited By (13)

Families Citing this family (1)

Citations (9)

• 1988
  • 1988-03-30 EP EP88200593A patent/EP0286167A3/fr not_active Withdrawn
  • 1988-04-05 CA CA 563241 patent/CA1332217C/fr not_active Expired - Fee Related
  • 1988-04-06 MX MX1100288A patent/MX170928B/es unknown
  • 1988-04-06 JP JP8496088A patent/JPS6420295A/ja active Pending
  • 1988-04-06 DK DK185888A patent/DK185888A/da not_active Application Discontinuation
  • 1988-04-06 AU AU14193/88A patent/AU623852B2/en not_active Ceased
  • 1988-04-06 FI FI881587A patent/FI91539C/fi not_active IP Right Cessation

Patent Citations (9)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events