GB2402396A - Hard surface cleaning compositions containing soaps - Google Patents

Abstract

Aqueous hard surface cleaning compositions based on Marseilles soaps further comprise a surfactant constituent, desirably an anionic surfactant, a nonionic surfactant or mixtures thereof, a source of potassium ions and optionally one or more of: an organic solvent constituent, especially one or more glycol ethers, a preservative constituent, and one or more further constituents which are directed to improving the aesthetic or functional features of the inventive compositions. The compositions demonstrate excellent storage stability at elevated temperatures, at room temperature and following successive freeze-thaw cycles.

Description

HARD SURFACE CEEANING COMPOSITIONS CONTAINING SOAPS

The present invention relates to hard surface cleaning compositions which include soaps. More specifically the present application relates to hard surface cleaning compositions based on potassium salt containing soaps.

Soaps are amongst the oldest known cleaning agents. Soaps are generally produced by combining fats or oils with alkalies or alkaline earths, usually by boiling, and consists of various salts e.g., potassium, sodium, of various fatty acids, e.g., oleic, stearic, palmitic, etc. According to this general reaction, many different soaps may be produced by variation of the reactants, especially the source of fats and/or oils which are reacted alkalies or alkaline earth. One well known type of soap is "Marseilles" soap, which is often generally formed by the reaction of a substantial proportion of olive oil with alkalies or alkaline earths, or with one or more naturally occurring sources of alkali materials such as seawater, with the resultant soap being a fine-grained hard soap, having either a white or mottled appearance, or may also be a liquid at room temperature.

Cleaning compositions which may also provide a disinfecting or sanitizing effect are commercially important products. Such are typically aqueous compositions which typically include one or more synthetic surfactants and one or more organic solvents which in conjunction with the water present provide a primary cleaning benefit to a treated surface, such as a stained hard surface. Optionally such cleaning compositions may also include a disinfecting effective or sanitizing effective agent which acts to provide a simultaneous disinfecting benefit with the cleaning benefit provided to a hard surface as well. Rarely however do such cleaning compositions include any appreciable amounts of soap as on the one hand the one or more synthetic surfactants typically widely and inexpensively available and are effective, while on the other hand it is known that the incorporation of soaps into a cleaning composition is rarely a trivial exercise in chemical formulation. Nonetheless it would be desirable to provide a cleaning composition, particularly a liquid cleaning composition which includes a significant amount of a soap, particularly a soap which is produced from natural sources of fats and oils.

According to the one aspect of the invention, there is provided an aqueous hard surface cleaning composition which comprises (preferably consists essentially of): Marseilles soap; a surfactant constituent, desirably an anionic surfactant, a nonionic surfactant or mixtures thereof, but most desirably solely a nonionic surfactant; a source of potassium ions; optionally but desirably an organic solvent constituent, desirably one or more glycol ethers; optionally but desirably a preservative constituent; optionally one or more further constituents which are directed to improving the aesthetic or functional features of the inventive compositions; the balance being water.

In further aspects of the invention there are provided processes for the production of the aforesaid compositions.

Particularly preferred compositions exhibit good stability upon storage, at room temperature, at elevated temperatures, and after successive freeze-thaw cycles.

It is yet a further object of the invention to provide a cleaning composition which features the benefits described above.

It is a further object of the invention to provide a process for the cleaning of hard surfaces, which process comprises the step of: providing a composition as outlined above, and applying an effective amount to a hard surface requiring such treatment.

A still further object of the invention is directed to a process for the manufacture a cleaning composition described above.

The compositions of the invention include a soap constituent, particularly a soap constituent based on sodium soaps. A particularly preferred soap is marketed as "Marseilles" soap which is broadly described to be a composition based on the sodium salts of fatty acids derived from olive oil and/or cottonseed oils. Generally Marseilles soap is a described to be a mixture of olive oils and vegetable oils (copra oils, palm oils) which are reacted with alkaline ash derived fiom sea vegetation as wells as with saline water obtained from the Mediterranean Sea. The specific composition of such Marseilles soap may vary slightly amongst manufacturers however the sale of this product is - 2 regulated to comprise at least 72%wt. pure soap, and to contain not more than 0.1%wt.

free soda, not more than 0.4%wt. sodium chloride, and to contain not more that 0.5%wt.

glycerol. Little or no coloring or artificial additives are included in the product. A traditional process for manufacturing Marseilles soap is described to include the following steps: the mixture of olive oils and vegetable oils is provided with the alkalies or alkaline earths (soda) to permit saponification of the oils, and this mixture is then cooked at about 120 C for about 10 days; subsequently the mixture is washed with seawater in order to remove the soda used in the saponification reaction, and the resultant composition is permitted to lay undisturbed for about 2 days; optionally one or more further wash operations, usually with fresh water (non-saline) may be used to further rinse any remaining alkali from the soap mixture; and, finally the mixture at an elevated temperature (usually 50 C - 70 C) is poured into forms in which it is allowed to cool and dry, after which it may be removed.

The Marseilles soap is present in the aqueous hard surface cleaning compositions of the present invention in an amount of from about 0.2%wt. to about 3.0% by weight, more preferably is present in an amount of from about 0.55 - 1.75%wt., and most preferably is present in an amount of from about 0.85 -1.5%wt.

The inventive compositions further necessarily include a surfactant constituent, which is desirably an anionic surfactant, a nonionic surfactant, or mixtures thereof Generally any nonionic surfactant material may be used in the inventive compositions. Practically any hydrophobic compound having a carboxy, hydroxy, amide, or amino group with a free hydrogen attached to the nitrogen can be condensed with an alkylene oxide, especially ethylene oxide or with the polyhydration product thereof, a polyallcylene glycol, especially polyethylene glycol, to form a water soluble or water dispersible nonionic surfactant compound. By way of non-limiting example, particularly examples of suitable nonionic surfactants which may be used in the present invention include the following: One class of useful nonionic surfactants include polyalkylene oxide condensates of alkyl phenols. These compounds include the condensation products of alkyl phenols having an alkyl group containing from about 6 to 12 carbon atoms in either a straight chain or branched chain configuration with an alkylene oxide, especially an ethylene - 3 oxide, the ethylene oxide being present in an amount equal to 5 to 25 moles of ethylene oxide per mole of alkyl phenol. The alkyl substituent in such compounds can be derived, for example, from polymerized propylene, diisobutylene and the like. Examples of compounds of this type include nonyl phenol condensed with about 9.5 moles of ethylene oxide per mole of nonyl phenol; dodecylphenol condensed with about 12 moles of ethylene oxide per mole of phenol; dinonyl phenol condensed with about 15 moles of ethylene oxide per mole of phenol and diisooctyl phenol condensed with about 15 moles of ethylene oxide per mole of phenol.

A further class of useful nonionic surfactants include the condensation products of aliphatic alcohols with from about 1 to about 60 moles of an alkylene oxide, especially an ethylene oxide. The alkyl chain of the aliphatic alcohol can either be straight or branched, primary or secondary, and generally contains from about 8 to about 22 carbon atoms.

Examples of such ethoxylated alcohols include the condensation product of myristyl alcohol condensed with about 10 moles of ethylene oxide per mole of alcohol and the condensation product of about 9 moles of ethylene oxide with coconut alcohol (a mixture of fatty alcohols with alkyl chains vatying in length from about 10 to 14 carbon atoms).

Other examples are those C6 -Cal straight-chain alcohols which are ethoxylated with from about 3 to about 6 moles of ethylene oxide. Their derivation is well known in the art.

Examples include Alfonic 810-4.5, which is described in product literature from Sasol as a C-C0 straight-chain alcohol having an average molecular weight of 356, an ethylene oxide content of about 4.85 moles (about 60 wt.%), and an HLB of about 12; Alfonic 810-2, which is described in product literature as a Ca-Co straight-chain alcohols having an average molecular weight of 242, an ethylene oxide content of about 2.1 moles (about 40 wt.%), and an HLB of about 12; and Alfonic 610-3.5, which is described in product literature as having an average molecular weight of 276, an ethylene oxide content of about 3.1 moles (about 50 wt. %), and an HLB of 10. Other examples of alcohol ethoxylates are Ci0 oxo- alcohol ethoxylates available from BASE under the Lutensol ON tradename. They are available in grades containing from about 3 to about 11 moles of ethylene oxide (available under the names Lutensol ON 30; Lutensol ON 50; Lutensol ON 60; Lutensol) ON 65; Lutensol ON 66; Lutensol ON 70, Lutensol ON 80; and Lutensol@ON 110). Other examples of ethoxylated alcohols include the Neodol 91 series non-ionic surfactants available from Shell Chemical Company which are described as C9-Cn ethoxylated alcohols. The Neodol) 91 series non-ionic surfactants of interest include Neodol 91-2.5, Neodol 91-6, and Neodol 91-8. Neodol) 91-2.5 has been described as having about 2.5 ethoxy groups per molecule; Neodol 91-6 has been described as having about 6 ethoxy groups per molecule; and Neodol 91-8 has been described as having about 8 ethoxy groups per molecule.

Further examples of ethoxylated alcohols include the Rhodasurf DA series non-ionic surfactants available from Rhodia which are described to be branched isodecyl alcohol ethoxylates. Rhodasurf DA-530 has been described as having 4 moles of ethoxylation and an HLB of 10.5; Rhodasurf DA-630 has been described as having 6 moles of ethoxylation with an HLB of 12.5; and Rhodasurf DA-639 is a 90% solution of DA 630. Further examples of ethoxylated alcohols include those from Tomah Products (Milton, Wp under the Tomadol tradename with the formula RO(CH2CH20)nH where R is the primary linear alcohol and n is the total number of moles of ethylene oxide. The ethoxylated alcohol series from Tomah include 91-2. 5; 91-6; 91-8 - where R is linear C9/C)C and n is 2.5, 6, or 8; 1-3; 1-5; 1-7; 1-73B; 1-9; where R is linear C and n is 3, 5, 7 or 9; 23-1; 23-3; 23-5; 23-6.5 - where R is linear C2/C3 and n is 1, 3, 5, or 6.5; 25-3; 25-7; 25-9; 25-12 - where R is linear C2/C3/C4/ Cis and n is 3, 7, 9, or 12; and 45-7; 45 13 - where R is linear C4/ C5 and n is 7 or 13.

A further class of useful nonionic surfactants include primary and secondary linear and branched alcohol ethoxylates, such as those based on C6-C alcohols which further include an average of from 2 to 80 moles of ethoxylation per mol of alcohol.

These examples include the Genapol UD (ex. Clariant, Muttenz, Switzerland) described under the tradenames Genapol UD 030, C-oxo-alcohol polyglycol ether with 3 EO; Genapol UD, 050 C-oxo-alcohol polyglycol ether with 5 EO; Genapol) UD 070, C- oxo-alcohol polyglycol ether with 7 EO; Genapol UD 080, C-oxo-alcohol polyglycol ether with 8 EO; Genapol UD 088, C-oxo-alcohol polyglycol ether with 8 EO; and Genapol UD 110, Ci -oxo-alcohol polyglycol ether with 11 EO.

A further class of useful nonionic surfactants include those surfactants having a formula: RO(CH2CH20)nH - 5 wherein; R is a mixture of linear, even carbon-number hydrocarbon chains ranging from C2H25 to C6H33 and n represents the number of ethoxy repeating units and is a number of from about 1 to about 12. I Surfactants of this formula are presently marketed under the Genapol tradename (ox. Clariant), which surfactants include the "26-L" series of the general formula RO(CH2CH20)l'H wherein R is a mixture of linear, even carbon-number hydrocarbon chains ranging from Cl2H25 to Cl6H33 and n represents the number of repeating units and is a number of from 1 to about 12, such as 26-L-1, 26-L-1.6, 26-L-2, 26-L-3, 26-L-5, 26 L-45, 26-L- 50, 26-L-60, 26-L-60N, 26-L-75, 26-L-80, 26-L-98N, and the 24-L series, derived from synthetic sources and typically contain about 55% Cl2 and 45% C4 alcohols, such as 24-L-3, 24-L-45, 24-L-50, 24-L-60, 24-L-60N, 24- L-75, 24-L-92, and 24-L-98N, all sold under the Genapol tradename.

A further class of useful nonionic surfactants include alkoxy block copolymers, and in particular, compounds based on ethoxy/propoxy block copolymers. Polymeric alkylene oxide block copolymers include nonionic surfactants in which the major portion of the molecule is made up of block polymeric C2-C4 alkylene oxides. Such nonionic surfactants, while preferably built up from an alkylene oxide chain starting group, and can have as a starting nucleus almost any active hydrogen containing group including, without limitation, amides, phenols, thiols and secondary alcohols.

One group of such useful nonionic surfactants containing the characteristic alkylene oxide blocks are those which may be generally represented by the formula (A): Ho-(Eo)x(po)y(Eo)rH (A) where EO represents ethylene oxide, I PO represents propylene oxide, y equals at least 15, (EO)x+y equals 20 to 50% of the total weight of said compounds, and, the total molecular weight is preferably in the range of about 2000 to 15,000. These surfactants are available under the PLURONIC (ex. BASF) or Emulgen (ex. Kao.) - 6 A further group of such useful nonionic surfactants containing the characteristic alkylene oxide blocks are those can be represented by the formula (B): R(EO,PO)a(EO'PO)bH (B) I wherein R is an alkyl, aryl or aralkyl group, where the R group contains 1 to 20 carbon atoms, the weight percent of EO is within the range of O to 45% in one of the blocks a, b, and within the range of 60 to 100% in the other ofthe blocks a, b, and the total number of moles of combined EO and PO is in the range of 6 to 125 moles, with 1 to 50 moles in the PO rich block and 5 to 100 moles in the EO rich block. Specific nonionic surfactants which in general are encompassed by Formula B include butoxy derivatives of propylene oxide/ethylene oxide block polymers having molecular weights within the range of about 2000-5000.

Still further examples of useful nonionic surfactants include those which can be represented by formula (C) as follows: RO(BO)n(EO)xH (C) wherein EO represents ethylene oxide, BO represents butylene oxide, R is an alkyl group containing I to 20 carbon atoms, n is about 5-15 and x is about 5-15.

Yet further useful nonionic surfactants include those which may be represented by the following formula (D): HO-(EO\(BO)n(EO)rH (D) wherein EO represents ethylene oxide, BO represents butylene oxide, n is about 5-15, preferably about 15, x is about 5-15, preferably about 15, and y is about 5-15, preferably about 15.

Still further exemplary useful nonionic block copolymer surfactants include ethoxylated derivatives of propoxylated ethylene diamine, which may be represented by the following formula: H(EO)y(PO)x: / (Po)x(Eo)yH CH2 CH2 (E) H(0)y(PO)x / (PO)x(EO)yH where (EO) represents ethoxy, (PO) represents propoxy, the amount of (PO)x is such as to provide a molecular weight prior to ethoxylation of about 300 to 7500, and the amount of (EO)y is such as to provide about 20% to 90% of the total weight of said compound.

Further useful non-ionic surfactants which may be used in the inventive compositions include those presently marketed under the trade name Pluronics (ex.

BASF). The compounds are formed by condensing ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol. The molecular weight of the hydrophobic portion of the molecule is of the order of 950 to 4,000 and preferably 200 to 2,500. The addition of polyoxyethylene radicals of the hydrophobic portion tends to increase the solubility of the molecule as a whole so as to make the surfactant water-soluble. The molecular weight of the block polymers varies from 1,000 to 15,000 and the polyethylene oxide content may comprise 20% to 80% by weight. Preferably, these surfactants are in liquid form and particularly satisfactory surfactants are available as those marketed as Pluronics L62 and Pluronics L64.

Alkylmonoglyocosides and alkylpolyglycosides which find use in the present inventive compositions include known nonionic surfactants which are alkaline and electrolyte stable. Alkylmonoglycosides and alkylpolyglycosides are prepared generally by reacting a monosaccharide, or a compound hydrolyzable to a monosaccharide with an alcohol such as a fatty alcohol in an acid medium. Various glycoside and polyglycoside - 8 compounds including alkoxylated glycosides and processes for marring them are disclosed in U.S. Pat. Nos. 2,974,134; 3,219,656; 3,598,865; 3,640, 998; 3,707,535, 3,772,269; 3,839,318; 3,974,138; 4,223,129 and 4,528,106 the contents of which are incorporated by reference.

One exemplary group of such useful alkylpolyglycosides include those according to the formula: R20(CnH2nO)r(Z)x wherein: R2 is a hydrophobic group selected from alkyl groups, alkylphenyl groups, hydroxyalkylphenyl groups as well as mixtures thereof, wherein the alkyl groups may be straight chained or branched, and which contain from about 8 to about 18 carbon atoms, n has a value of 2 - 8, especially a value of 2 or 3; r is an integer from 0 to 10, but is preferably 0, Z is derived from glucose; and, x is a value from about 1 to 8, preferably from about 1.5 to 5.

Preferably the alkylpolyglycosides are nonionic fatty alkylpolyglucosides which contain a straight chain or branched chain Cs -C,5 alkyl group, and have an average of from about 1 to 5 glucose units per fatty alkylpolyglucoside molecule. More preferably, the nonionic fatty alkylpolyglucosides which contain straight chain or branched C' -Cats aLkyl group, and have an average of from about 1 to about 2 glucose units per fatty aLkylpolyglucoside molecule.

A further exemplary group of alkyl glycoside surfactants suitable for use in the practice of this invention may be presented by the following formula (A): RO-(R'O\(Gh Zb (A) wherein: R is a monovalent organic radical containing from about 6 to about 30, preferably from about 8 to 18 carbon atoms, Rat is a divalent hydrocarbon radical containing from about 2 to about 4 carbon atoms, y is a number which has an average value from about 0 to about 1 and is preferably 0, G is a moiety derived from a reducing saccharine containing 5 or 6 carbon atoms; and, x is a number having an average value from about 1 to 5 (preferably from 1.1 to 2); o Z is O2MI, 2, O(CH2), CO2MI, OSO3MI, or O(CH2)SO3MI; R2 is (CH2)CO2 Ml or CH=CHCO2Mi; (with the proviso that Z can be O2Mi only if Z is in place of a primary hydroxyl group in which the primary hydroxyl-bearing carbon atom, - o CH2OH, is oxidized to form a C OM1) b is a number of from 0 to 3x+1 preferably an average of from 0.5 to 2 per glycosal group; p is 1 to 10, Ml is H+ or an organic or inorganic counterion, particularly cations such as, for example, an alkali metal cation, ammonium cation, monoethanolamine cation or calcium cation. As defined in Formula (A) above, R is generally the residue of a fatty alcohol having from about 8 to 30 and preferably 8 to 18 carbon atoms. Examples of such alkylglycosides as described above include, for example APG 325 CS Glycoside which is described as being a 50% Cg-Cil alkyl polyglycoside, also commonly referred to as D glucopyranoside, (commercially available from Henkel KGaA) and Glucopon 625 CS which is described as being a 50% Clo-CI6 alkyl polyglycoside, also commonly referred to as a D- glucopyranoside, (ox. Henkel).

Further nonionic surfactants which may be included in the inventive compositions include alkoxylated alkanolamides, preferably C-C24 alkyl di(C2-C3 alkanol amides), as represented by the following formula: R5-CONH-R6OH wherein Rs is a branched or straight chain Cs-C24 alkyl radical, preferably a Cl0-CI6 alkyl radical and more preferably a Cl2-CI4 alkyl radical, and R6 is a Cl-C4 alkyl radical, preferably an ethyl radical.

According to certain particularly preferred embodiments the surfactant constituent comprises a nonionic surfactant based on a linear primary alcohol ethoxylate particularly wherein the alkyl portion is a Ca to Cl2, but particularly a C9 to Cl I alkyl group, and having an average of between about 6 to about 8 moles of ethoxylation. -

Further, in certain preferred embodiments on the invention, the surfactant constituent consists solely of one or more nonionic surfactants to the exclusion of anionic or other classes of surfactants. Very desirably, the sole surfactant present is a linear primary alcohol ethoxylate, especially the linear primary alcohol ethoxylate noted above.

Generally any anionic surfactant material may be used in the inventive compositions. By way of non-limiting example, particularly suitable anionic surfactants include: alkali metal salts, ammonium salts, amine salts, or aminoalcohol salts of one or more of the following compounds (linear and secondary): alcohol sulfates and sulfonates, alcohol phosphates and phosphonates, alkyl sulfates, alkyl ether sulfates, sulfate esters of an alkylphenoxy polyoxyethylene ethanol, aLkyl monoglyceride sulfates, alkyl sulfonates, olefin sulfonates, paraffin sulfonates, beta-alkoxy alkane sulfonates, alkylamidoether sulfates, alkylaryl polyether sulfates, mono glyceride sulfates, alkyl ether sulfonates, ethoxylated alkyl sulfonates, alkylaryl sulfonates, alkyl benzene sulfonates, alkylamide sulfonates, alkyl monoglyceride sulfonates, aLkyl carboxylates, aLkyl sulfoacetates, alkyl ether carboxylates, alkyl alkoxy carboxylates having 1 to 5 moles of ethylene oxide, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkyl sulfosuccinamates, octoxynol or nonoxynol phosphates, alkyl phosphates, alkyl ether phosphates, taurates, N-acyl taurates, fatty taurides, fatty acid amide polyoxyethylene sulfates, isethionates, acyl isethionates, and sarcosinates, acyl sarcosinates, or mixtures thereoú Generally, the alkyl or acyl radical in these various compounds comprise a carbon chain containing 12 to 20 carbon atoms.

Exemplary anionic surfactants useful in forming the compositions of the invention include alkyl sulfates which may be represented by the following general formula: o RO-(CH2CH2O)'-O Me wherein R is an straight chain or branched alkyl chain having from about 8 to about 18 carbon atoms, saturated or unsaturated, and the longest linear portion of the alkyl chain is carbon atoms or less on the average, M is a cation which makes the compound water soluble especially an alkali metal such as sodium, or is ammonium or substituted - 11 ammonium cation, and x is from 0 to about 4. Of these, most preferred are the non- ethoxylated C2-C5 primary and secondary alkyl sulfates.

Exemplary commercially available alkyl sulfates include one or more of those available under the tradenames RHODAPON (ex. Rh8ne-Poulenc Co.) as well as STEPANOL (ex. Stepan Chemical Co.). Exemplary alkyl sulfates which is preferred for use is a sodium lauryl sulfate surfactant presently commercially available as RHODAPON LCP (ex. Rhane-Poulenc Co.), as well as a further sodium lauryl sulfate surfactant composition which is presently commercially available as STEPANOL WAC (ex. Stepan Chemical Co.).

Further exemplary anionic surfactants useful in forming the compositions of the invention include alkyl sulfonate anionic surfactants which may be represented according to the following general formula: o R-(CH2CH2O)X 11O M(3 o wherein R is an straight chain or branched alkyl chain having from about 8 to about 18 carbon atoms, saturated or unsaturated, and the longest linear portion of the alkyl chain is carbon atoms or less on the average, M is a cation which makes the compound water soluble especially an alkali metal such as sodium, or is ammonium or substituted ammonium cation, and x is from 0 to about 4. Most preferred are the C2-C'5 primary and secondary alkyl sulfates.

Exemplary, commercially available alkane sulfonate surfactants include one or more of those available under the tradename HOSTAPUR (ex. Clariant) .

According to certain particularly preferred embodiments the surfactant constituent comprises an anionic surfactant based on alkylbenzene sulfonates. Desirably these alkylbenzene sulfonates comprise an alkyl group containing from about 9 to about 15 carbon atoms, in a straight chain or in a branched chain. Particularly useful are linear straight chain alkylbenzene sulfonates in which the average number of carbon atoms in the alkyl group is from about 11 to 14. - 12

Also contemplated to be useful as anionic surfactants are carboxylates which include alkyl- and alkylaryl-carboxylates which include those which may be represented by the general formula: R-COO- M+ wherein R is a straight or branched hydrocarbon chain containing from about 9 to 21 carbon atoms, and which may also include an aromatic ring, especially a phenyl group as part of the hydrocarbon chain, and M is a metal or ammonium ion. Further preferred alkylpolyoxycarboxylates include polyethoxycarboxylates which may be represented by the general formula: R[-OCH2CH2-]n-CH2COO- M+ wherein R is a straight chained or branched hydrocarbon chain which may include an aryl moiety, but is desirably a straight chained or branched hydrocarbon chain; and n is an integer value of from 1 - 24, and M is a metal or ammonium ion, but is preferably a alkali or alkaline earth metal ion, especially sodium.

Exemplary useful alkylpolyoxycarboxylates and alkylarylpolycarboxylates include those commercially available in the SANDOPAN series from Clariant Inc. (Charlotte, NC), as well as in the SURF1NE series from Finetex, Inc. Further, in certain preferred embodiments on the invention, the surfactant constituent consists of a linear primary alcohol ethoxylate with one or more linear straight chain alkylbenzene sulfonates, but may alternately consists solely of one or more anionic surfactants to the exclusion of nonionic or other classes of surfactants.

The surfactant constituent is present in the compositions of the present invention in an amount of from about 0.01%wt. to about 50%wt., more preferably is present in an amount of from 0.01 - 10%wt. Although the surfactant constituent may comprise one or more surfactants based on anionic, nonionic or both anionic and nonionic surfactants according to certain preferred embodiments the surfactant constituent consists exclusively of one or more nonionic surfactants, particularly solely a linear primary alcohol ethoxylate.

The inventive compositions optionally but very desirably comprise at least one organic solvent constituent, which may be one or more alcohols, glycols, acetates, ether acetates and glycol ethers. Exemplary alcohols useful in the compositions of the - 13 invention include C-C alcohols which may be straight chained or branched, and which are specifically intended to include both primary and secondary alcohols. Exemplary glycol ethers include those glycol ethers having the general structure Ra-O-RbOH, wherein Ra is an alkoxy of 1 to 20 carbon atoms, or aryloxy of at least 6 carbon atoms, and Rb is an ether condensate of propylene glycol and/or ethylene glycol having from one to ten glycol monomer units. Preferred are glycol ethers having one to five glycol monomer units. These are C3-C20 glycol ethers By way of further non-limiting example specific useful organics solvents include propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol n-propyl ether, ethylene glycol n-butyl ether, diethyleneglycol n-butyl ether, diethylene glycol methyl ether, propylene glycol, ethylene glycol, isopropanol, ethanol, methanol, diethylene glycol monoethyl ether acetate and particularly advantageously ethylene glycol hexyl ether, diethylene glycol hexyl ether, as well as the C3-C primary and secondary alcohols, especially isopropyl alcohol. Exemplarly useful organic solvents include those presently commercially available under the tradenames Carbitol@, and Cellosolve (Union Carbide Div. of Dow Chemical., Danbury CT), Dowanol (Dow Chemical Co., Midland MI) and Arcosolv (ARCO Chemical Co., Newton Square PA). Particularly useful are those organic solvents which are illustrated in the Examples. Particularly preferred are one or more of: dipropylene glycol n-butyl ether, propylene glycol n-butyl ether, ethylene glycol butyl ether, diethylene glycol butyl ether, propylene glycol n-propyl ether, and propylene glycol methyl ether. In certain specific embodiments the organic solvent constituent comprises one or more glycol ethers and optionally one or more alcohols, but preferably the sole organic solvent present in the compositions are one or more glycol ethers.

The organic solvent constituent is present in the compositions of the present invention in an amount of from about 0.01%wt. to about 20%wt., more preferably is present in an amount of from about 0.01 - 15%wt., and most preferably is present in an amount of from about 0.01 - 10%wt.

The compositions of the invention also necessarily include a source of potassium ions. Materials for use as a source of potassium ions include inorganic potassium salts of any form which are soluble or dispersible in water and which make available potassium - 14 ions to the aqueous composition. Exemplary useful phosphates include alkali metal pyrophosphate, an alkali metal polyphosphate such as potassium tripolyphosphate.

Exemplary useful phosphoric acids include, mono-, di-, tri- as well as tetra-phosphonic acids which may optionally also contain other functional groups such as carboxy, hydroxyl, thio and the like. Among these are phosphoric acids which may be represented by one of the following general formula: R'N[CH2Po3H2]2' wherein R' may represent a -[(C-C6)alkylene]-N[CH2PO3H2]2 group or may represent a third CH2PO2H2) group, or, R2C(PO3H2) 20H wherein R2 is a C,-C6 alkyl group.

The phosphoric acid may also comprise potassium salts of a low molecular weight phosphonopolycarboxylic acid such as one having about 2 - 4 carboxylic acid moieties and about 1 - 3 phosphoric acid groups, as well as potassium salts of alkylene phosphoric acids such as methylene phosphoric acids, and phosphorous acid (H3PO3) as well.

Preferred materials for use as a source of potassium ions include potassium carbonates, potassium phosphates, potassium polyphosphates, and potassium pyrophosphates. Particularly preferred are potassium tripolyphosphate, tetrapotassium pyrophosphate and potassium hydroxide of which tetrapotassium pyrophosphate is particularly preferred.

Advantageously any material or materials which functions as the source of potassium ions is present in sufficient amounts such that the final concentration of available potassium ions in the inventive compositions are from about 1 10'4 to about 1 103, but preferably from about 1-106 to about 1 108, and most preferably from about 1 10'7 to about 5 10'7 potassium ions per liter of composition. In the alternative the source of potassium ions is present in sufficient amounts such that the final concentration of available potassium ions in the inventive compositions are from about 50 ppm to about 20,000 ppm, but preferably the available potassium ions are present in the inventive compositions in amounts of from about 2000 ppm to about 6000 ppm. -

The present inventors have surprisingly found that compositions exhibiting good stability can be achieved wherein there is a sufficient concentration of available potassium ions in the aqueous compositions. While not wishing to be bound by the following, it is hypothesized that the potassium ions substitute a significant proportion of the sodium salts of the Ci4, Cal, OX and C20 fatty acids present in the soap constituent, especially in Marseilles soap, forming potassium salts of these fatty acids which exhibit improved aqueous solubility. The raw materials used to produce Marseilles soap is rich in such Cj4, Ci6, CIS and C20 fatty acids. Surprisingly the inventors have found that this improved aqueous solubility has a striking effect on the stability of the inventive compositions as evidenced by the behavior of the inventive compositions when subjected to storage at both room temperature, storage under elevated temperatures (105 F, 120 F) and to successive freeze-thaw cycles.

Advantageously the compositions according to the present invention comprise a preservative constituent. Since a significant portion of the formulation comprises water, it is preferably that the preservative be water soluble. Desirably, the selected water soluble preservatives are those which exhibit stability and efficacy in the aqueous compositions according to the invention at neutral, but preferably at alkaline pH's especially in the preferred pH ranges noted above. Such water soluble preservatives include compositions which include parabens, including methyl parabens and ethyl parabens, glutaraldehyde, formaldehyde, 2-bromo2-nitropropoane-1,3-diol, 5-chloro-2-methyl-4-isothiazolin-3 one, 2methyl-4-isothiazoline-3-one, and mixtures thereof One exemplary composition is a combination 5-chloro-2-methyl-4-isothiazolin-3-one and 2methyl-4-isothiazolin-3 one where the amount of either component may be present in the mixture anywhere from 0.001 to 99.99 weight percent, based on the total amount of the preservative. For reasons of availability, the most preferred preservative are those commercially available preservative comprising a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2 methyl-4- isothiazolin-3-one marketed under the trademark KATHON CG/ICP as a preservative composition presently commercially available from Rohm and Haas (Philadelphia, PA). Further useful preservative compositions include KATHON CG/ICP IL a further preservative composition presently commercially available from Rohm and Haas (Philadelphia, PA), PRONELY which is presently commercially - 16 available from Zeneca Biocides (Wilmington, DE), SUTTOCIDE A which is presently commercially available from Sutton Laboratories (Chatam, NJ) as well as TEXTAMER 38AD which is presently commercially available from Calgon Corp. (Pittsburgh, PA).

Particularly preferred for use in the inventive composition is a preparation containing 1,3 dihydroxymethyl-5,5-dimethylhydantoin and 3iodo-2-propynyl butyl carbamate which is presently commercially available as Dantogard Plus Liquid from Lonza Corp. (Fairlawn, NJ.) When included, the preservative constituent is present in the compositions of the present invention in any amount which is effective in retarding or eliminating the growth of undesired microorganisms in the inventive compositions particularly upon standing.

The preservative constituent need be present in only minor amounts, and is advantageously present in amounts for from about 0.1%wt. to about 0. 8%wt., more preferably is present in an amount of from about 0.2 - 0.6%wt. In preferred embodiments of the invention the preservative constituent is necessarily present.

The compositions of the present invention may also optionally comprise one or more further optional constituents which are directed to improving the aesthetic or functional features of the inventive compositions. By way of non-limiting example such further constituents include one or more of: coloring agents, fragrances and fragrance solubilizers, viscosity modifying agents, other surfactants, pH adjusting agents and pH buffers including organic and inorganic salts, optical brighteners, opacifying agents, hydrotropes, antifoaming agents, enzymes, and anti-oxidants. When one or more of the optional constituents is added, i.e., fragrance and/or coloring agents, the esthetic and consumer appeal of the product is often favorably improved. The use and selection of these optional constituents is well known to those of ordinary skill in the art and any optional constituent may be included which does not deleteriously effect the favorable properties of the invention.

While not an essential feature in all embodiments of the inventive compositions, according to certain preferred embodiments the liquid compositions of the invention necessarily comprise at least one fragrancing agent. Such may be one or more substances or mixtures of substances including those which are naturally derived (i.e., obtained by extraction of flower, herb, blossom or plant), those which are artificially derived or - 17 produced (i.e., mixture of natural oils andlor oil constituents), and those which are synthetically produced substances (odiferous substances). In the present invention, the precise composition of the fragrance constituent is of no particular consequence as long as it may be effectively included as a constituent of the compositions, and have a pleasing fragrance. For those compositions which are intended to be used in a domestic environment, the fragrance constituent, as well as the other ingredients used in making up compositions of the invention should be cosmetically acceptable, i.e., feature low toxicity or no toxicity, hypoallergenic character, etc. The fragrance constituent may be included in any effective amount. Most desirably however the fragrance constituent is chosen to be compatible with the Marseilles soap and to imitate the fragrance provided by the Marseilles soap itself.

According to certain preferred embodiments of the invention, one or more opacifiers are necessarily included in the composition as such are particularly attractive from a consumer standpoint. Exemplary opacifiers include for example those based on acrylic polymers, including styrene acrylic polymers such as are available within the Acusol) line of products from Rohm Haas. Further opacifiers include those based on higher molecular weight polyethylene glycols such as are available within the Renopal line of products from Goldschmidt Corp., as well as those based on aLkylene glycol stearates such as are available in the Cithrol like of products from Croda Corp. When included, the one or more further optional constituents which are directed to improving the aesthetic or functional features of the inventive compositions are present in the compositions of the present invention in any amount which is effective providing a desired aesthetic or functional feature. The total amount of these optional compositions present in the inventive compositions do not exceed about 10%wt., preferably do not exceed 2%wt., and most preferably do not exceed 1%wt.

As is noted above, the compositions according to the invention are largely aqueous in nature. Water is added to order to provide to 100% by weight of the compositions of the invention. The water may be tap water, but is preferably distilled and is most preferably deionized water. If the water is tap water, it is preferably substantially free of any undesirable impurities such as organics or inorganics, especially minerals salts which are present in hard water which may thus undesirably interfere with - 18 the operation of the constituents present in the aqueous compositions according to the invention.

The compositions are desirably at a neutral or alkaline pH, but desirably are at a pH of at least 7. Most desirably the inventive compositions are at a pH of about 8 to about 12.

In preferred embodiments, the inventive compositions exhibit excellent stability when subjected to storage at room temperature, storage under elevated temperatures (105 F, 120 F). In addition, especially preferred embodiments of the inventive compositions also exhibit excellent stability when subjected to successive free-thaw cycles.

The stability of an inventive composition to storage under room temperature (approx. 20 C, 68 F) can be evaluated by visual observation, particularly by evaluating the homogeneity of the composition, essentially the lack of two or more separate phases or of any precipitation, of the compositions. These evaluations are preferably made at each 24 hour interval in a seven day period following the production of the composition.

Ideally if the compositions exhibit the lack of any precipitated materials at the bottom of the container, then the composition is considered acceptable.

The stability of an inventive composition to storage under elevated temperatures (approx. 50 C, 122 F) can be evaluated by subjecting the composition to the elevated temperature for 24 hour intervals, thereafter removing the heated composition and then allowing it to cool to room temperature and then visually evaluating the homogeneity of the compositions as noted above. Subsequently the composition is resubjected to the elevated temperature for 24 hour intervals, and again removed, allowed to cool to room temperature and then visually revaluated. This process of heating, cooling and evaluation are desirably repeated for 7 days. Again, the compositions are considered acceptable if they exhibit the lack of any precipitated materials at the bottom of the container when evaluated over this 7 day period.

In addition to excellent storage stability under room temperature and under elevated temperature conditions preferred embodiments of the inventive compositions also exhibit excellent stability when subjected to successive free-thaw cycles. Stability to successive free-thaw cycles can be evaluated by forming a composition and thereafter - 19 freezing it to a solid mass, and thereafter permit it to thaw to 5 C. The thawed compositions may be manually shaken before evaluating their appearance. The composition may then be refrozen, and rethawed according to the same protocol, and reevaluated, and this cycle repeated a third time as well. The compositions are considered acceptable if they exhibit the lack of any precipitated materials at the bottom of the container when evaluated after three free-thaw cycles.

It is a further object of the invention to provide a process for the cleaning of hard surfaces which process comprises the step of: providing a composition as outlined above, and applying an effective amount of the said composition requiring treatment. The inventive compositions are desirably provided as a ready-to-use product which may be directly applied to a hard surface. By way of example, hard surfaces include surfaces composed of refractory materials such as: glazed and unglazed tile, brick, porcelain, ceramics as well as stone including marble, granite, and other stones surfaces; glass; metals; plastics e.g. polyester, vinyl; fiberglass, Formica I), Coriander) and other hard surfaces known to the industry. Hard surfaces which are to be particularly denoted are lavatory fixtures such as shower stalls, bathtubs and bathing appliances (racks, curtains, shower doors, shower bars) toilets, bidets, wall and flooring surfaces especially those which include refractory materials and the like. Further hard surfaces which are to be denoted are those associated with kitchen environments and other environments associated with food preparation, including cabinets and countertop surfaces as well as walls and floor surfaces especially those which include refractory materials, plastics, Formica4}), Corian3) and stone. Such hard surfaces described above are to be understood as being recited by way of illustration and not be way of limitation.

In preferred embodiments, the compositions are readily pumpable using a manually operable trigger spray apparatus and are desirably provided as a ready to use product in a container package which comprises a manually operable trigger spray apparatus and a non-pressurized reservoir or bottle for containing the inventive compositions. In use, the consumer generally applies an effective amount of the composition and within a few moments thereafter, wipes off the treated area with a rag, towel, brush or sponge, usually a disposable paper towel or sponge. In certain applications, however, especially where undesirable stain deposits are heavy, the composition according to the invention may be left on the stained area until it has effectively loosened the stain deposits after which it may then be wiped off, rinsed off, or otherwise removed. For particularly heavy deposits of such undesired stains, multiple applications may also be used.

The inventive compositions may be produced by any of a number of known art techniques. Most simply the constituents may be added, under stirring to a large aliquot of the water used to produce the formulation until all of the constituents are added with the final amount of water added last. Alternately a large aliquot of the water is added to a mixing vessel provided with an agitator, and under agitation the following constituents are added in the following order: organic solvent, Marseilles soap, surfactants, source of potassium ions, optional constituents (e.g., preservative, opacifier, fragrance, coloring agents) and finally any remaining water needed to provide the remaining 100%wt of the composition. All or some of the individual constituents may be preheated in order to facilitate their mixing with the water, and the water may also be heated to an elevated temperature, but usually not heated in excess of about 90 C, and preferably not in excess of about 40 C.

A first preferred process for the manufacture of the inventive compositions contemplates adding to a suitable mixing vessel containing the total amount of water (preferably "soft water") which is heated to 20 C-25 C the organic solvent(s), followed by the Marseilles soap which is stirred under moderate agitation using a conventional electrically driven laboratory agitator, and stirring is continued until the soap is melted and a homogenous mixture is formed. Subsequently under continued stirring is added the nonionic surfactant, then the source of potassium ions, and stirring is permitted to continue until the composition clarifies. Thereafter the remaining constituents may be added in any order, except for the opacifier which, when present, is provided in the last step.

A second preferred process for the manufacture of the inventive compositions contemplates the following steps. To a suitable mixing vessel is supplied the total amount of "soft water" which heated to 40 C, to which is added the Marseilles soap which is stirred under moderate agitation using a conventional electrically driven laboratory agitator, and stirring at 40 C is continued until the soap is melted and a - 2 1 homogenous mixture is formed. Heating is discontinued, and thereafter the source of potassium ions is added to the solution, and stirring continued until the composition is homogenous and the composition clarifies. Subsequently under continuous stirring are added in order: surfactant(s), organic solvent(s), and when present, the remaining constituents, e.g., preservative, fragrance, and lastly the opacifier if included.

The following examples below illustrate exemplary formulations as well as preferred embodiments of the invention. It is to be understood that these examples are provided by way of illustration only and that further useful formulations falling within the scope of the present invention and the claims may be readily produced by one skilled in the art without deviating fiom the scope and spirit of the invention.

Examples

Certain embodiments of the invention, including preferred embodiments of the invention are described amongst the following example formulations. Also provided are certain comparative formulations. The compositions presented in the example formulations as well as the comparative formulations were produced in accordance with either the first preferred process, or the second preferred process for the manufacture of the inventive compositions outlined above, the manner of their manufacture is not critical to the properties of the inventive compositions. - 22

1T E:3] E o o _, o, 0 _, :_, , l, , , . i: E 0, o, o I, , , , , o ' , o, o Eight 0, 0 o, . , , : , , o o o, E ) o, 0, :: , , _, _ m. 0, _. . ttLld F:13 ) o, , 2: , , , : o, : , , , o a, 111 0, , O j_ ' , O _, N o N l _ I l O N 0 _ _ O __:: ' , No N __ -_ 111 0 _:_ 0 _ _, :: ' , , N N, _ _ jI 'i.! The constituents used to produce the formulations described on Table 1 are described on the following Table 2, which lists the commercial source of the named chemical compound.

Table 2

Marseille Soap Marseille Soap (100%wt. actives) ex. Chimotechnique/Nouvelle Savonnerie Francaise di(propylene glycol) n-butyl ether Dowanol DPnB (98%wt. actives) ex. Dow Chemical Corp. isopropanol isopropanol (100%wt. actives) propylene glycol propylene glycol (100%wt. actives) C9-C11 alkylethoxylate, 6EO Neodol 91-6 (100%wt. actives) ex.Shell C8-C11 alkylethoxylate, 6EO Neodol 91-8 (100%wt. actives) ex. Shell ethoxylated fat alcohols/quatemary Rewoquat.) CQ 100 (100%wt. actives) ammonium chlorides ex. Degussa Corp. linear alkylbenzene sulfonate Bio-Soft6) D40 (40%wt. actives) ex. Stepan Co. TEA- alkylbenzene sulfonate Bio-Softl3) N-300 (60%wt. actives) ex. Stepan Co. sodium cumene sulfonate Stepanate49 SCS (40%wt. actives) ex. Stepan co.

potassi u m tripolyphosphate, an hyd rous an hydrous potassium tri polyphosphate (100%wt. actives) ex. Astaris tetrapotassium pyrophosphate tetrapotassium pyrophosphate (100%wt.

actives) ex. Astaris potassium hydroxide potassium hydroxide (80%wt. actives) sodium hydroxide sodium hydroxide (50%wt. actives) ex.

VWR

styrene acrylic polymer Acusol OP 305 (40%wt. actives) ex. Rohm 8 Haas preservative composition 1,3-dihydroxymethyl-5,5 dimethylhydantoin and 3iodo-2-propynyl butyl carbamate commercially sold as Dantogard ED Plus (70%wt. actives) ex. Lonza Corp. fragrance So. Marseille 24 (proprietary composition) monoethanolamine monoethanolamine (99%wt. actives) ex. Dow Chemical Corp. triethanolamine triethanolamine (99%wt. actives) ex. Dow Chemical CorD.

tetrasodium ethylene diamine tetrasodium ethylene diamine tetraacetic tetreacetic acid acid (100%wt. actives) ex. AKZO-Nobel citric acid citric acid (100%wt. actives) ex. ADM Corp. polydimethylsiloxane emulsion Dow Coming 152019 (6%wt. actives) ex. Dow Chemical Corp. deionized water deionized water, or Usoft water - 24 The physical properties of several compositions described in Table 1 were evaluated in accordance with one or more of the following protocols.

In addition to excellent storage stability under room temperature and under elevated temperature conditions preferred embodiments of the of the invention also exhibited excellent stability when subjected to successive freeze-thaw cycles, which was evaluated according to the following general protocols: Separate aliquots of each of the Example compositions, as well as separate aliquots of certain of the Comparative compositions described on Table 1 were subjected to stability testing at room temperature (approx. 20 C), as well as under elevated temperature conditions, (approx. 50 C) and to three successive freeze thaw cycles in accordance with the protocol recited previously. For the evaluations at room temperature, visual evaluations were made at 24 hours, 48 hours and 1 week after the initiation of the test; none of the Example compositions were observed to exhibit any precipitated materials at the bottom of the container. For the evaluations at elevated temperature conditions, visual evaluations were made at 24 hours, 48 hours and 1 week after the initiation of the test; none of the Example compositions were observed to exhibit any precipitated materials at the bottom of the container. Similarly for evaluations subsequent to three successive freeze-thaw cycles, visual evaluations were made and none of the Example compositions were observed to exhibit any precipitated materials at the bottom of the container.

Each of the Comparative compositions described on Table 1 were formed in the same manner as the Example compositions, and the following observations are noted.

The composition according to Comp. A did not include a source of potassium ions, and after 7 days of testing at elevated temperature conditions, (approx. 50 C), a significant amount of precipitate was observed at the bottom ofthe container in which it was tested.

The composition according to Comp. B. subsequent to 7 days of testing at elevated temperature conditions, (approx. 50 C), a significant amount of precipitate was observed at the bottom of the container in which it was tested. Similarly, for the composition according to Comp. C, subsequent to 7 days of testing at elevated temperature conditions, (approx. 50 C), a significant amount of precipitate was observed at the bottom of the container in which it was tested. The composition of Comp. D failed to form a - 25 homogenous mixture, and instead formed a gelatinous body which could not be remixed.

The composition according to Comp. E did not include a source of potassium ions, and further, after exhibited precipitate after 7 days of storage at a low temperature (4.5 C, 40 F).

As described above, each of the Comparative compositions exhibited precipitation of material during one or more of the stability tests at room temperature, and/or elevated temperature and/or subsequent to three successive freeze-thaw cycles, or could not be formed into homogenous liquid mixtures containing a source of potassium ions.

As can be seen from the foregoing the compositions of the invention were superior to the comparative compositions.

While the invention is susceptible of various modifications and alternative forms, it is to be understood that specific embodiments thereof have been shown by way of examples which are not intended to limit the invention to the particular forms disclosed; on the contrary the intention is to cover all modifications, equivalents and alternatives falling within the scope and spirit ofthe invention as expressed in the appended claims. - 26

Claims (22)

1. Claims: 1. An aqueous hard surface cleaning composition which comprises

   (preferably consists essentially of): Marseille soap; a surfactant constituent, desirably an anionic surfactant, a nonionic surfactant or mixtures thereof, but most desirably solely a nonionic surfactant; a source of potassium ions; optionally but desirably an organic solvent constituent, desirably one or more glycol ethers; optionally but desirably a preservative constituent; optionally one or more further constituents which are directed to improving the aesthetic or functional features of the inventive compositions; the balance being water.
2. 2. The composition according to claim 1 wherein the Marseilles soap comprises at least 72%wt. pure soap, contains not more than 0.1%wt. free soda, contains not more than 0.4%wt. sodium chloride, and contains not more that 0.5%wt. glycerol.
3. 3. The composition according to claim 1 or 2 wherein the Marseilles soap comprises 0.2%wt. to about 3.0% by weight of the composition.
4. 4. The composition according to claim 1 wherein the source of potassium ions is an inorganic potassium salt.
5. 5. The composition according to claim 4 wherein the source of potassium ions is selected from: alkali metal pyrophosphate, an alkali metal polyphosphates and phosphoric acids. - 27
6. 6. The composition according to claim 5 wherein the source of potassium ions is a phosphoric acid which may be represented by one of the following general formula: R'N[CH2PO3H2]2.

   wherein Rat may represent a -[(C-C6)alkylene]-N-[CH2PO3H2]2 group or may represent a third CH2PO2H2) group, or, R2C(PO3H2)20H wherein R2 is a C-C6 alkyl group.
7. 7. The composition according to claim 5 wherein the source of potassium ions are selected from: potassium salts of a low molecular weight phosphonopolycarboxylic acid having about 2 - 4 carboxylic acid moieties and about 1 - 3 phosphoric acid groups, potassium salts of alkylene phosphoric acids, and phosphorous acid (H3PO3).
8. 8. The composition according to claim 1 wherein the source of potassium ions are selected from potassium carbonates, potassium phosphates, potassium polyphosphates, and potassium pyrophosphates.
9. 9. The composition according to claim 9 wherein the source of potassium ions are selected from: potassium tripolyphosphate, tetrapotassium pyrophosphate and potassium hydroxide.
10. 10. The composition according to claim 1 wherein the source of potassium ions is present in sufficient amounts such that the final concentration of available potassium ions are from about 50 ppm to about 20,000 ppm,
11. 11. The composition according to claim 10 wherein the source of potassium ions is present in amounts of from about 2000 ppm to about 6000 ppm.
12. 12. The composition according to claim 1 wherein the surfactant constituent comprises a nonionic surfactant based on a linear primary alcohol ethoxylate wherein the - 28 alkyl portion is a Cs to Cl2, alkyl group, and having an average of between about 6 to about 8 moles of ethoxylation.
13. 13. The composition according to claim 1 wherein the surfactant constituent consists solely of a nonionic surfactant based on a linear primary alcohol ethoxylate wherein the alkyl portion is a C' to C,2, alkyl group, and having an average of between about 6 to about 8 moles of ethoxylation.
14. 14. The composition according to claim 1 wherein the surfactant constituent is present in amount of from about 0.01%wt. to about 50%wt.
15. 15. The composition according to claim 1 wherein the organic solvent constituent is selected from one or more alcohols, glycols, acetates, ether acetates and glycol ethers.
16. 16. The composition according to claim 15 wherein the organic solvent constituent is a glycol ether.
17. 17. The composition according to claim 1 wherein the organic solvent constituent is present in an amount of from about 0.01%wt. to about 20%wt.
18. 18. The composition according to claim 1 which contains a preservative constituent.
19. 19. The composition according to claim 1 which contains a fragrancing agent.
20. 20. The composition according to claim 1 which, when subjected to storage under room temperature (approx. 20 C, 68 F) conditions exhibits the lack of any precipitated materials at the bottom of the container after 7 days of storage under such conditions.
21. 21. The composition according to claim 1 which, when subjected to storage under elevated temperatures (approx. 50 C, 122 F) exhibits the lack of any precipitated - 29 materials at the bottom of the container when evaluated after 7 days of storage under such conditions.
22. 22. The composition according to claim 1 which, when subjected to three successive free-thaw cycles exhibit the lack of any precipitated materials at the bottom of the container when evaluated after said three free-thaw cycles. - 30