Automatic dishwashing composition

Abstract

There is provided an automatic dishwashing composition comprising: from 1% to 99% by weight of a builder, based on the dry weight of the automatic dishwashing composition; 0.2% to 15% by weight, based on the dry weight of the automatic dishwashing composition, of a nonionic surfactant; and from 0.5% to 9% by weight, based on the dry weight of the automatic dishwashing composition, of carboxyalkyl tamarind wherein the carboxyalkyl tamarind has a carboxyalkyl substitution degree, DSCA, of from 0.01 to 0.390 (as measured according to ASTM D1439-15).

Description

[0001] The present invention relates to dispersant polymers for use in automatic dishwashing formulations. In particular, the present invention relates to an automatic dishwashing composition comprising: 1 wt% to 99 wt% of a builder, based on the dry weight of the automatic dishwashing composition; 0.2 wt% to 15 wt% of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition; and 0.5 wt% to 9 wt% of a carboxyalkyl tamarind, based on the dry weight of the automatic dishwashing composition, wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS, of 0.01 to 0.390 CA (as measured according to ASTM D1439-15).

[0002] Dishwashing compositions are generally recognized as a distinct class of detergent compositions from those used for laundry or water treatment. Users expect dishwashing compositions to produce a film-free appearance on the washed items after a complete wash cycle.

[0003] Phosphate-free dishwashing compositions are increasingly popular. Phosphate-free dishwashing compositions typically rely on non-phosphate builders, such as citrates, carbonates, silicates, disilicates, bicarbonates, aminocarboxylates, and other salts to complex with calcium and magnesium from hard water and leave insoluble visible deposits after drying.

[0004] Christopher et al. in U.S. Patent No. 5,431,846 disclose a family of polycarboxylate copolymers and their use as builders in detergent compositions and rinse aid compositions for the final rinse step of a dishwashing or warewashing machine. Christopher et al. disclose block copolymers comprising 20 mole % to 95 mole % of monomer units derived from itaconic acid or homologs thereof and 5 mole % to 80 mole % of monomer units derived from vinyl alcohol or lower alkyl vinyl esters, which are excellent binders for divalent or polyvalent metals and are suitable for use as potentially biodegradable builders in detergent compositions and machine dishwashing compositions and anti-scaling rinse compositions.

[0005] Swift et al. in U.S. Patent No. 5,191,048 disclose a family of terpolymers and their use as dispersants, among other things. Swift et al. teach terpolymers comprising as polymerized units about 15 to 55 mole percent of at least one first monomer selected from the group consisting of vinyl acetate, vinyl ether, and vinyl carbonate, about 10 to 70 mole percent of at least one second monomer of an ethylenically unsaturated monocarboxylic acid, and about 15 to 55 mole percent of at least one third monomer of an anhydride of a dicarboxylic acid, and wherein the terpolymer is formed in a non-aqueous system such that less than about one more percent of the monomers hydrolyze during polymerization.

[0006] Nonetheless, there remains a need for new dispersant polymers for use in dishwashing formulations. In particular, there remains a need for new dispersant polymers for use in dishwashing formulations, wherein the dispersant polymers provide effective low filming performance; are of biological origin and biodegradable.

[0007] The present invention provides an automatic dishwashing composition comprising: from 1 wt% to 99 wt% of a builder, based on the dry weight of the automatic dishwashing composition; from 0.2 wt% to 15 wt% of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition; from 0.5 wt% to 9 wt% of a carboxyalkyl tamarind, based on the dry weight of the automatic dishwashing composition, wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS CA .

[0008] The present invention provides an automatic dishwashing composition comprising: from 30 wt% to 60 wt% of a builder, based on the dry weight of the automatic dishwashing composition; from 4 wt% to 8 wt% of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition; from 3 wt% to 7 wt% of a carboxyalkyl tamarind, based on the dry weight of the automatic dishwashing composition, wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS CA ; from 1 wt% to 53.5 wt% of a filler, based on the dry weight of the automatic dishwashing composition; from 5 wt% to 20 wt% of a bleach, based on the dry weight of the automatic dishwashing composition; from 2.5 wt% to 7.5 wt% of a bleach activator, based on the dry weight of the automatic dishwashing composition; and from 2 wt% to 4 wt% of an enzyme, based on the dry weight of the automatic dishwashing composition. DETAILED DESCRIPTION

[0009] Surprisingly, it has been found that carboxyalkyl tamarind having a carboxyalkyl degree of substitution, DS CAcarboxyalkyl rumbutan provide good spotting and filming performance on glassware, while having the benefit of improving the overall sustainability of dishwashing detergent formulations (i.e., are biologically sourced and exhibit improved biodegradability relative to conventional dispersant polymers such as polyacrylic acid).

[0010] Unless otherwise indicated, ratios, percentages, parts, and the like are by weight. Weight percentages (or wt%) in the compositions are percentages of dry weight, i.e., not including any water that can be present in the composition. Percentages of monomeric units in a polymer are percentages of dry weight, i.e., not including any water present in the polymer emulsion.

[0011] As used herein, unless otherwise indicated, the phrase "molecular weight" or MW refers to weight average molecular weight as measured in the conventional manner with gel permeation chromatography (GPC) and conventional standards, such as polystyrene molecular weight standards. GPC techniques are discussed in detail in Modern Size-Exclusion Liquid Chromatography - Practice of Gel Permeation and Gel Filtration Chromatography, 2ndEdition, A. M. Striegel, W. W. Yau, J. J. Kirkland, D. D. Bly; John Wiley & Sons, Inc. 2009. Molecular weights are reported herein in units of Daltons or equivalently g / mol.

[0012] Preferably, the automatic dishwashing composition of the present application comprises: 1 wt.% to 99 wt.% (preferably, 10 wt.% to 98 wt.%; more preferably, 25 wt.% to 82.5 wt.%; most preferably, 30 wt.% to 60 wt.%) of a builder (preferably, wherein the builder comprises at least one of a carbonate, a bicarbonate, a citrate, and a silicate) based on the dry weight of the automatic dishwashing composition; 0.2 wt.% to 15 wt.% (preferably, 1 wt.% to 12 wt.%; more preferably, 2 wt.% to 10 wt.%; most preferably, 4 wt.% to 8 wt.%) of a nonionic surfactant (preferably, wherein the nonionic surfactant is a fatty alcohol alkoxylate) based on the dry weight of the automatic dishwashing composition; and 0.5 wt.% to 9 wt.% (preferably, 0.75 wt.% to 8 wt.%; more preferably, 1 wt.% to 7.5 wt.%; most preferably, 3 wt.% to 7 wt.%) of a carboxyalkyl tamarind (preferably, wherein the carboxyalkyl is selected from the group consisting of carboxymethyl, carboxyethyl, carboxypropyl, carboxybutyl, and mixtures thereof; more preferably, wherein the carboxyalkyl is selected from the group consisting of carboxymethyl, carboxyethyl, and mixtures thereof; most preferably, the carboxyalkyl is carboxymethyl) based on the dry weight of the automatic dishwashing composition; wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS, of 0.01 to 0.390 (preferably 0.05 to 0.380; more preferably, 0.1 to 0.375; most preferably 0.2 to 0.370) CA (as measured according to ASTM D1439-15).

[0013] Preferably, the automatic dishwashing composition of the present application comprises: a builder. Preferably, the builder used in the automatic dishwashing composition of the present application comprises at least one of a carbonate, a citrate, and a silicate. Most preferably, the builder used in the automatic dishwashing composition of the present application comprises at least one of sodium carbonate, sodium bicarbonate, sodium citrate, and citric acid.

[0014] Preferably, the automatic dishwash composition of the present application comprises: from 1 wt% to 99 wt% (preferably, from 10 wt% to 98 wt%; more preferably, from 25 wt% to 82.5 wt%; most preferably, from 30 wt% to 60 wt%) of a builder, based on the dry weight of the automatic dishwash composition. Preferably, the automatic dishwash composition of the present application comprises: > 1 wt% (preferably, > 10 wt%; more preferably, > 25 wt%; most preferably, > 30 wt%) of a builder, based on the dry weight of the automatic dishwash composition. Preferably, the automatic dishwash composition of the present application comprises: < 99 wt% (preferably, < 98 wt%; more preferably, < 82.5 wt%; most preferably, < 60 wt%) of a builder, based on the dry weight of the automatic dishwash composition. The weight percent of carbonate, citrate, and silicate is based on the actual weight of the salt (including the metal ion).

[0015] The term "carbonate" as used herein and in the appended claims means an alkali metal or ammonium carbonate, bicarbonate, percarbonate, and / or sesquicarbonate. Preferably, the carbonate (if any) used in the automatic dishwash composition is selected from the group consisting of sodium, potassium, and lithium carbonate (more preferably, sodium or potassium salt; most preferably, sodium salt). The percarbonate (if any) used in the automatic dishwash composition is selected from the group consisting of sodium, potassium, lithium, and ammonium salt (more preferably, sodium or potassium salt; most preferably, sodium salt). Most preferably, the carbonate (if any) used in the automatic dishwash composition comprises at least one of sodium carbonate, sodium bicarbonate, and sodium percarbonate. Preferably, when the builder used in the automatic dishwash composition of the present application comprises a carbonate, the automatic dishwash composition preferably comprises: from 0 wt% to 97 wt% (preferably, from 5 wt% to 75 wt%; more preferably, from 10 wt% to 60 wt%; most preferably, from 20 wt% to 50 wt%) of a carbonate, based on the dry weight of the automatic dishwash composition.

[0016] The term "citrate" as used herein and in the appended claims means alkali metal citrates and citric acid. Preferably, the citrate (if any) used in the automatic dishwashing composition is selected from the group consisting of citric acid and citrates of sodium, potassium and lithium (more preferably, the salt of sodium or potassium; most preferably, the salt of sodium). More preferably, the citrate (if any) used in the automatic dishwashing composition is sodium citrate and / or citric acid. Preferably, when the builder used in the automatic dishwashing composition of the present application comprises a citrate, the automatic dishwashing composition preferably comprises: from 0wt% to 97wt% (preferably, from 5wt% to 75wt%; more preferably, from 10wt% to 60wt%; most preferably, from 20wt% to 40wt%) of citrate, based on the dry weight of the automatic dishwashing composition.

[0017] The term "silicate" as used herein and in the appended claims means alkali metal silicates. Preferably, the silicate (if any) used in the automatic dishwashing composition is selected from the group consisting of silicates of sodium, potassium and lithium (more preferably, the salt of sodium or potassium; most preferably, the salt of sodium). More preferably, the silicate (if any) used in the automatic dishwashing composition is sodium disilicate. Preferably, the builder used in the automatic dishwashing composition of the present application comprises a silicate. Preferably, when the builder used in the automatic dishwashing composition of the present application comprises a silicate, the automatic dishwashing composition preferably comprises: from 0wt% to 97wt% (preferably, from 0.1wt% to 10wt%; more preferably, from 0.5wt% to 7.5wt%; most preferably, from 0.75wt% to 3wt%) of silicate, based on the dry weight of the automatic dishwashing composition.

[0018] Preferably, the automatic dishwashing composition of the present application comprises: from 0.2 wt% to 15 wt% (preferably, from 1 wt% to 12 wt%; more preferably, from 2 wt% to 10 wt%; most preferably, from 4 wt% to 8 wt%) of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition. More preferably, the automatic dishwashing composition of the present application comprises: from 0.2 wt% to 15 wt% (preferably, from 1 wt% to 12 wt%; more preferably, from 2 wt% to 10 wt%; most preferably, from 4 wt% to 8 wt%) of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition; wherein the nonionic surfactant is selected from the group consisting of polyoxyalkylene surfactants, polyalkylene glycol esters, polyoxyethylene derivatives of polyol fatty acid esters, polyalkoxylated polyol fatty acid esters, polyalkoxylated natural fats and oils, polyoxyalkylene block copolymers, alkyl polyglucosides, sucrose esters, and mixtures thereof. Still more preferably, the automatic dishwashing composition of the present application comprises: from 0.2 wt% to 15 wt% (preferably, from 1 wt% to 12 wt%; more preferably, from 2 wt% to 10 wt%; most preferably, from 4 wt% to 8 wt%) of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition; wherein the nonionic surfactant comprises a fatty alcohol alkoxylate. Most preferably, the automatic dishwashing composition of the present application comprises: from 0.2 wt% to 15 wt% (preferably, from 1 wt% to 12 wt%; more preferably, from 2 wt% to 10 wt%; most preferably, from 4 wt% to 8 wt%) of a nonionic surfactant, based on the dry weight of the automatic dishwashing composition; wherein the nonionic surfactant is a fatty alcohol alkoxylate according to Formula III

[0019]

[0020] wherein w is an average value of from 5 to 100 (preferably, from 6 to 75; more preferably, from 7 to 60; most preferably, from 8 to 50); wherein R 4 is selected from the group consisting of hydrogen and linear or branched C 1-20 alkyl groups (preferably, hydrogen and linear or branched C 1-20 alkyl groups; more preferably, hydrogen and linear C 1-20 alkyl groups); wherein R 5 is selected from the group consisting of linear or branched C 1-20 alkyl groups and linear or branched C 1-4 hydroxyalkyl groups (preferably, linear or branched C 1-20 alkyl groups; more preferably, linear C 1-20 alkyl groups); wherein each R 6is independently selected from the group consisting of hydrogen, methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, 2-butyl group, and 2-methyl-2-butyl group (preferably, hydrogen, methyl group, and ethyl group); and provided that the sum of the total number of carbon atoms in R 4 and R 5 is 5 to 21 (preferably, 6 to 20 carbon atoms; more preferably, 7 to 20 carbon atoms).

[0021] Preferably, the automatic dishwashing composition of the present application comprises: 0.5 wt.% to 9 wt.% (preferably, 0.75 wt.% to 8 wt.%; more preferably, 1 wt.% to 7.5 wt.%; most preferably, 3 wt.% to 7 wt.%) of carboxyalkyl tamarind based on the dry weight of the automatic dishwashing composition (preferably, wherein the carboxyalkyl is selected from the group consisting of carboxymethyl, carboxyethyl, carboxypropyl, carboxybutyl, and mixtures thereof; more preferably, wherein the carboxyalkyl is selected from the group consisting of carboxymethyl, carboxyethyl, and mixtures thereof; most preferably, the carboxyalkyl is carboxymethyl), wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS CA as measured according to ASTM D1439-15. More preferably, the automatic dishwashing composition of the present application comprises: 0.5 wt.% to 9 wt.% (preferably, 0.75 wt.% to 8 wt.%; more preferably, 1 wt.% to 7.5 wt.%; most preferably, 3 wt.% to 7 wt.%) of carboxyalkyl tamarind based on the dry weight of the automatic dishwashing composition (preferably, wherein the carboxyalkyl is selected from the group consisting of carboxymethyl, carboxyethyl, carboxypropyl, carboxybutyl, and mixtures thereof; more preferably, wherein the carboxyalkyl is selected from the group consisting of carboxymethyl, carboxyethyl, and mixtures thereof; most preferably, the carboxyalkyl is carboxymethyl), wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS CA as measured according to ASTM D1439-15; wherein the carboxyalkyl tamarind comprises a base tamarind gum substituted with carboxyalkyl groups; wherein 90 mole% to 100 mole% (preferably, 92 mole% to 100 mole%; more preferably, 95 mole% to 100 mole%; still more preferably, 98 mole% to 100 mole%; most preferably, 99 mole% to 100 mole%) of the carboxyalkyl substitution is on the galactose moieties of the base tamarind gum.

[0022] The automatic dishwashing composition of the present application optionally additionally comprises: an additive. Preferably, the automatic dishwashing composition of the present application further comprises an additive selected from the group consisting of: phosphonates (e.g., hydroxyethyldiphosphonic acid (HEDP)); an alkali source; a bleach (e.g., sodium percarbonate, sodium perborate); a bleach activator (e.g., tetraacetylethylenediamine (TAED)); a bleach catalyst (e.g., manganese(II) acetate, cobalt(II) chloride, bis(TACN) magnesium trioxide diacetate); an enzyme (e.g., protease, amylase, lipase, or cellulase); a foam inhibitor; a colorant; a fragrance; an additional builder; an antibacterial agent; a filler; a deposition control polymer; and mixtures thereof. More preferably, the automatic dishwashing composition of the present application additionally comprises an additive, wherein the additive is selected from the group consisting of: a bleach, a bleach activator, an enzyme, a filler, and mixtures thereof. Still more preferably, the automatic dishwashing composition of the present application further comprises an additive, wherein the additive comprises a bleach (e.g., sodium percarbonate, sodium perborate); a bleach activator (e.g., tetraacetylethylenediamine (TAED)), and an enzyme (e.g., protease, amylase, lipase, or cellulase). Most preferably, the automatic dishwashing composition of the present application further comprises an additive, wherein the additive comprises a bleach, wherein the bleach comprises sodium percarbonate; a bleach activator, wherein the bleach activator comprises tetraacetylethylenediamine (TAED); and an enzyme, wherein the enzyme comprises protease and amylase.

[0023] Preferably, the automatic dishwashing composition of the present application optionally further comprises: from 0wt% to 15wt% (preferably, from 0.1wt% to 15wt%; more preferably, from 0.5wt% to 10wt%; still more preferably, from 0.75wt% to 7.5wt%; most preferably, from 1wt% to 5wt%) of a phosphonate salt, based on the dry weight of the automatic dishwashing composition. More preferably, the automatic dishwashing composition of the present application comprises: from 0wt% to 15wt% (preferably, from 0.1wt% to 15wt%; more preferably, from 0.5wt% to 10wt%; still more preferably, from 0.75wt% to 7.5wt%; most preferably, from 1wt% to 5wt%) of a phosphonate salt, based on the dry weight of the automatic dishwashing composition; wherein the phosphonate salt has a weight average molecular weight of <1,000 Daltons. Still more preferably, the automatic dishwashing composition of the present application comprises: from 0wt% to 15wt% (preferably, from 0.1wt% to 15wt%; more preferably, from 0.5wt% to 10wt%; still more preferably, from 0.75wt% to 7.5wt%; most preferably, from 1wt% to 5wt%) of a phosphonate salt, based on the dry weight of the automatic dishwashing composition; wherein the phosphonate salt comprises at least one of 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) and salts of 1-hydroxyethylidene-1,1-diphosphonic acid. Most preferably, the automatic dishwashing composition of the present application comprises: from 0wt% to 15wt% (preferably, from 0.1wt% to 15wt%; more preferably, from 0.5wt% to 10wt%; still more preferably, from 0.75wt% to 7.5wt%; most preferably, from 1wt% to 5wt%) of a phosphonate salt, based on the dry weight of the automatic dishwashing composition; wherein the phosphonate salt is selected from the group consisting of 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) and salts thereof.

[0024] Fillers included in automatic dishwashing composition tablets or powders are inert water-soluble materials, typically sodium or potassium salts (e.g., sodium sulfate, potassium sulfate, sodium chloride, potassium chloride). In tablets and powders, fillers are typically present in amounts ranging from 0wt% to 75wt% (preferably, from 1wt% to 53.5wt%). Fillers included in gel formulations typically include those mentioned for tablets and powders and also include water. Fragrances, dyes, foam inhibitors, enzymes, and antibacterial agents typically total no more than 10wt%, alternatively no more than 5wt%, of the automatic dishwashing composition.

[0025] The automatic dishwashing composition of the present application optionally further comprises: an alkali source. Suitable alkali sources include, but are not limited to, alkali metal carbonates and alkali metal hydroxides, such as sodium or potassium carbonate, sodium or potassium bicarbonate, sodium or potassium sesquicarbonate, sodium hydroxide, lithium hydroxide, or potassium hydroxide, or mixtures of the foregoing. Sodium hydroxide is preferred. The amount of alkali source, if any, in the automatic dishwashing composition of the present application is preferably at least 1 wt% (preferably, at least 20 wt%) and up to 80 wt% (preferably, up to 60 wt%) based on the dry weight of the automatic dishwashing composition.

[0026] The automatic dishwashing composition of the present application optionally further comprises: a bleaching agent (e.g., sodium percarbonate). The amount of bleaching agent, if any, in the automatic dishwashing composition of the present application is preferably at a concentration of from 1 wt% to 25 wt% (more preferably, from 5 wt% to 20 wt%) based on the dry weight of the automatic dishwashing composition.

[0027] The automatic dishwashing composition of the present application optionally further comprises: a bleach activator (e.g., tetraacetyl ethylene diamine (TAED)). The amount of bleach activator, if any, in the automatic dishwashing composition of the present application is preferably at a concentration of from 1 wt% to 10 wt% (more preferably, from 2.5 wt% to 7.5 wt%) based on the dry weight of the automatic dishwashing composition.

[0028] Preferably, the automatic dishwashing composition of the present application optionally further comprises: an enzyme (e.g., protease, amylase, lipase, cellulase). More preferably, the automatic dishwashing composition of the present application optionally further comprises: from 0 wt% to 10 wt% (preferably, from 0.5 wt% to 7.5 wt%; more preferably, from 1 wt% to 5 wt%; more preferably, from 2 wt% to 4 wt%) of enzyme based on the dry weight of the automatic dishwashing composition. Most preferably, the automatic dishwashing composition of the present application further comprises: from 0 wt% to 10 wt% (preferably, from 0.5 wt% to 7.5 wt%; more preferably, from 1 wt% to 5 wt%; most preferably, from 2 wt% to 4 wt%) of enzyme based on the dry weight of the automatic dishwashing composition, wherein the enzyme comprises a mixture of protease and amylase.

[0029] Preferably, the automatic dishwashing composition of the present application comprises: < 1 wt% (preferably, < 0.5 wt%; more preferably, < 0.2 wt%; still more preferably, < 0.1 wt%; yet still more preferably, < 0.01 wt%; most preferably, < detectable limit) of phosphate based on the weight of the automatic dishwashing composition. Preferably, the automatic dishwashing composition of the present application is phosphate-free.

[0030] Preferably, the automatic dishwash composition of the present application comprises: < 1 wt.% (preferably, < 0.5 wt.%; more preferably, < 0.2 wt.%; still more preferably, < 0.1 wt.%; yet still more preferably, < 0.01 wt.%; most preferably, < the limit of detectability), based on the weight of the automatic dishwash composition, of a builder selected from the group consisting of nitrilotriacetic acid; ethylenediaminetetraacetic acid; diethylenetriaminepentaacetic acid; glycine-N,N-diacetic acid; methylglycine-N,N-diacetic acid; 2-hydroxyethyliminodiacetic acid; glutamic acid-N,N-diacetic acid; 3-hydroxy-2,2'-iminodisuccinic acid; S,S-ethylenediamine disuccinic aspartic acid-diacetic acid; N,N'-ethylenediamine disuccinic acid; iminodisuccinic acid; aspartic acid; aspartic acid-N,N-diacetic acid; beta-alanine diacetic acid; polyaspartic acid; salts thereof, and mixtures thereof. Most preferably, the automatic dishwash composition of the present application comprises 0 wt.% of a builder selected from the group consisting of nitrilotriacetic acid; ethylenediaminetetraacetic acid; diethylenetriaminepentaacetic acid; glycine-N,N-diacetic acid; methylglycine-N,N-diacetic acid; 2-hydroxyethyliminodiacetic acid; glutamic acid-N,N-diacetic acid; 3-hydroxy-2,2'-iminodisuccinic acid; S,S-ethylenediamine disuccinic aspartic acid-diacetic acid; N,N'-ethylenediamine disuccinic acid; iminodisuccinic acid; aspartic acid; aspartic acid-N,N-diacetic acid; beta-alanine diacetic acid; polyaspartic acid; salts thereof, and mixtures thereof.

[0031] Preferably, the automatic dishwash composition of the present application comprises: < 1 wt.% (preferably, < 0.5 wt.%; more preferably, < 0.1 wt.%; still more preferably, < 0.01 wt.%; yet still more preferably, < 0.001 wt.%; most preferably, < the limit of detectability), based on the weight of the automatic dishwash composition, of an alkali metal formate. Preferably, the automatic dishwash composition of the present application is free of formate.

[0032] Preferably, the automatic dishwash composition of the present application has a pH (1 wt.% in water) of at least 9 (preferably, > 10; more preferably, > 11.5). Preferably, the automatic dishwash composition of the present application has a pH (1 wt.% in water) of no greater than 13.

[0033] Preferably, the automatic dishwashing compositions of the present application can be formulated into any typical form, for example, as a tablet, powder, block, single dose, pouch, paste, liquid, or gel. More preferably, the automatic dishwashing compositions of the present application are formulated as a tablet, powder, granule, or block. Most preferably, the automatic dishwashing compositions of the present application are formulated as a powder or granule (preferably, as a granule). The automatic dishwashing compositions of the present application can be used to clean dishware, such as eating and cooking utensils, dishes, in an automatic dishwashing machine.

[0034] Preferably, the automatic dishwashing compositions of the present application are anhydrous formulations. More preferably, the automatic dishwashing compositions of the present application are anhydrous formulations containing: < 10 wt.%, (preferably, < 5 wt.%; more preferably, < 2 wt.%; most preferably, < 1 wt.%) water, based on the dry weight of the automatic dishwashing composition.

[0035] Preferably, the automatic dishwashing compositions of the present application comprise: < 1 wt.%, (preferably, < 0.5 wt.%; more preferably, < 0.2 wt.%; still more preferably, < 0.1 wt.%; yet still more preferably, < 0.01 wt.%; most preferably, < the limit of detectability) of phosphate (measured as elemental phosphorous), based on the weight of the automatic dishwashing composition. Preferably, the automatic dishwashing compositions of the present application are phosphate-free.

[0036] Preferably, the automatic dishwashing compositions of the present application are suitable for use under typical operating conditions. For example, when used in an automatic dishwashing machine, the typical water temperature during the wash cycle is preferably from 20°C to 85°C, preferably from 30°C to 70°C. The typical concentration of the automatic dishwashing composition is preferably from 0.02 wt.% to 1 wt.% (more preferably, from 0.03 wt.% to 0.7 wt.%), based on the total liquid in the dishwashing machine. By choosing the appropriate product form and addition time, the automatic dishwashing compositions of the present application can be present in the pre-wash, main wash, penultimate rinse, final rinse, or any combination of these cycles.

[0037] Some embodiments of the present application will now be described in detail in the following Examples.

[0038] Comparative Examples C1 to C2 and Example 1 : Automatic dishwashing compositions

[0039] Dishwashing compositions were prepared in each of Comparative Examples C1-C2 and Example 1 having the component formulations identified in Table 1.

[0040]

[0041] Procedure for preparing food soil

[0042] The STIWA food soils described in Table 2 were prepared by the following procedure.

[0043] a) Boil water.

[0044] b) Mix instant gravy, benzoic acid and starch in a paper cup; then add the mixture to the boiling water.

[0045] c) Add milk and margarine to the product of (b).

[0046] d) Allow the product of (c) to cool to about 40°C, and then add the mixture to a kitchen blender (Polytron).

[0047] e) Combine egg yolk, ketchup and mustard in another paper cup, and mix with a spoon.

[0048] f) Add the product of (e) to the mixture of (d) in the blender under continuous stirring.

[0049] g) Blend the product of (f) in the blender for 5 minutes.

[0050] h) Freeze the product food soil mixture from (g).

[0051] i) At the start of the main wash, introduce 50 g of frozen ice slush into the dishwasher.

[0052]

[0053] Dishwashing test conditions

[0054] Machine: Miele SS-ADW, model G1223SC Labor. A 30 min wash cycle at 65°C followed by two rinse cycles with a rinse water temperature of 65°C and a final 30 min drying step. After completion of the drying cycle, the dishwasher door was opened for 30 min to allow the steam to evaporate. Water: The initial water supplied to the dishwasher had a target conductivity of 1,260 to 1,360 μβ / ηη. Food soils: 50 g of the composition noted in Table 2 were introduced into the cup frozen wash liquor. Each of the dishwashing compositions from Comparative Examples C1-C2 and Example 1 were tested. The food soils were added at the start of the wash cycle. The test detergent was also added to the dishwasher at the start of the wash cycle. The test detergents were each dosed at 15.29 g / wash (on a solids basis). The number of wash cycles used to generate the film and spots in this experiment was 15.

[0055] Film and stain formation evaluation

[0056] After each wash cycle of the 15 wash cycles under the above dishwashing test conditions, the large glass tumbler, wine glass, and stainless steel butter dish were dried in the open air. After drying, the film and stain ratings were determined by a trained evaluator by viewing the large glass tumbler and wine glass in a light box with controlled lighting from below. The film and stain of the large glass tumbler, wine glass, and stainless steel butter dish were rated according to the ASTM method, ranging from 1 (no film / stain) to 5 (heavy film / stain). The average of the film and stain ratings was determined to be 1 to 5, as reported in Table 3. The values for total stain, total film, and total gloss (i.e., total stain + total film) for each dishwashing composition are also reported in Table 3. The results of the viewing of the stainless steel butter dish with controlled lighting from above are reported in Table 4.

[0057]

[0058]

Claims

1. An automatic dishwashing composition comprising: from 1 wt% to 99 wt% of a builder, based on dry weight of the automatic dishwashing composition; from 0.2 wt% to 15 wt% of a nonionic surfactant, based on dry weight of the automatic dishwashing composition; and 0.5 wt. % to 9 wt. % carboxyalkyl tamarind based on the dry weight of the automatic dishwashing composition, wherein the carboxyalkyl tamarind has a carboxyalkyl degree of substitution, DS, of 0.01 to 0.390 CA .

2. The automatic dishwashing composition of claim 1, wherein the automatic dishwashing composition is a solid.

3. The automatic dishwashing composition of claim 2, wherein the automatic dishwashing composition comprises < 10 wt% water, based on weight of the automatic dishwashing composition.

4. The automatic dishwashing composition of claim 3, wherein the builder is selected from the group consisting of carbonates, bicarbonates, citrates, silicates, and mixtures thereof.

5. The automatic dishwashing composition of claim 4, wherein the automatic dishwashing composition comprises less than 0.1 wt% phosphate measured as elemental phosphorous, based on dry weight of the automatic dishwashing composition.

6. The automatic dishwashing composition of claim 5, wherein the automatic dishwashing composition comprises 0 wt% of a builder selected from the group consisting of nitrilotriacetic acid; ethylenediaminetetraacetic acid; diethylenetriaminepentaacetic acid; glycine-N,N-diacetic acid; methylglycine-N,N-diacetic acid; 2-hydroxyethyliminodiacetic acid; glutamic acid-N,N-diacetic acid; 3-hydroxy-2,2'-iminodisuccinic acid; S,S-ethylenediamine disuccinic acid aspartic acid-diacetic acid; N,N'-ethylenediamine disuccinic acid; iminodisuccinic acid; aspartic acid; aspartic acid-N,N-diacetic acid; beta-alanine diacetic acid; polyaspartic acid; salts thereof, and mixtures thereof, based on dry weight of the dishwashing detergent formulation.

7. The automatic dishwashing composition of claim 6, further comprising an additive.

8. The automatic dishwashing composition of claim 7, wherein the additive is selected from the group consisting of a bleach, a bleach activator, an enzyme, a filler, and mixtures thereof.

9. The automatic dishwashing composition of claim 8, wherein the additive comprises a mixture of a filler, a bleach; a bleach activator and an enzyme.

10. The automatic dishwashing composition of claim, comprising: from 30 wt% to 60 wt% of the builder, based on dry weight of the automatic dishwashing composition; from 4 wt% to 8 wt% of the nonionic surfactant, based on dry weight of the automatic dishwashing composition; from 3 wt% to 7 wt% of the carboxyalkyl tallo, based on dry weight of the automatic dishwashing composition; from 1 wt% to 53.5 wt% of the filler, based on dry weight of the automatic dishwashing composition; from 5 wt% to 20 wt% of the bleach, based on dry weight of the automatic dishwashing composition; from 2.5 wt% to 7.5 wt% of the bleach activator, based on dry weight of the automatic dishwashing composition; and from 2 wt% to 4 wt% of the enzyme, based on dry weight of the automatic dishwashing composition.

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