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WO2018206811A1 - Composition de détergent pour lave-vaisselle automatique - Google Patents

Composition de détergent pour lave-vaisselle automatique Download PDF

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Publication number
WO2018206811A1
WO2018206811A1 PCT/EP2018/062283 EP2018062283W WO2018206811A1 WO 2018206811 A1 WO2018206811 A1 WO 2018206811A1 EP 2018062283 W EP2018062283 W EP 2018062283W WO 2018206811 A1 WO2018206811 A1 WO 2018206811A1
Authority
WO
WIPO (PCT)
Prior art keywords
detergent composition
composition according
builder
acid
nonionic surfactant
Prior art date
Application number
PCT/EP2018/062283
Other languages
English (en)
Inventor
Bart Riekus POSTMUS
Jan Hendrik Verkade
Original Assignee
Unilever N.V.
Unilever Plc
Conopco, Inc., D/B/A Unilever
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever N.V., Unilever Plc, Conopco, Inc., D/B/A Unilever filed Critical Unilever N.V.
Priority to ES18723011T priority Critical patent/ES2962909T3/es
Priority to EP18723011.5A priority patent/EP3622048B1/fr
Publication of WO2018206811A1 publication Critical patent/WO2018206811A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/722—Ethers of polyoxyalkylene glycols having mixed oxyalkylene groups; Polyalkoxylated fatty alcohols or polyalkoxylated alkylaryl alcohols with mixed oxyalkylele groups
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols
    • C11D1/721—End blocked ethers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3788—Graft polymers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds

Definitions

  • the present invention relates to an automatic dishwashing detergent composition containing builder, bleach component, a graft copolymer having a polysaccharide backbone and one or more side chains of one or more synthetic monomeric units, a polyoxyethylene-based nonionic surfactant and optionally one or more other ingredients.
  • the automatic dishwashing (ADW) detergent composition of the present invention combines a very good cleaning action with minimal spotting and film-forming.
  • ADW detergents constitute a distinct class of detergent compositions. Unlike most other detergents, ADW detergents have to be low-foaming. In addition, a spotless and film-free appearance of glasses and silverware is the expected final result of each automatic dishwashing run.
  • ADW detergents are mixtures of ingredients whose purpose, in combination, is to break down and remove food soils; to inhibit foaming caused by certain food soils; and to remove stains which can be caused by beverages such as coffee and tea or by vegetable soils such as carotenoid soils.
  • Spotting and filming of glassware are the chief criteria by which the performance of a dishwashing formulation is judged.
  • Spotting is an obvious reference to discrete residues on glassware which are formed when water droplets evaporate and leave behind dissolved solids.
  • Filming refers to a more uniform deposition over a large, continuous portion of the glass surface. This film can sometimes be of organic origin (resulting from soil in the wash liquor or organic components in the detergent) but is also often inorganic in nature, due to the formation and deposition of some mineral precipitate.
  • ADW detergents may comprise a variety of detergent ingredients, including alkalinity sources, builders, bleaching systems, anti-scalants, corrosion inhibitors, surfactants, antifoams, sheeting polymers and/or enzymes.
  • Builder materials are used to provide alkalinity and buffering capacity, maintain ionic strength, extract metals from soils and/or remove alkaline earth metal ions from washing solutions.
  • Examples of builder materials include phosphates, alkali metal citrates, carbonates and bicarbonates; and the salts of nitrilotriacetic acid (NTA); methylglycine diacetic acid (MGDA); glutaric diacetic acid (GLDA), polycarboxylates such as polymaleates, polyacetates, polyhydroxyacrylates,
  • polyacrylate/polymaleate and polyacrylate/polymethacrylate copolymers as well as zeolites; layered silicas and mixtures thereof.
  • Phosphate-free or low-phosphate compositions rely on non-phosphate builders, such as salts of citrate, carbonate, silicate, disilicate, bicarbonate, aminocarboxylates and others to sequester calcium and magnesium from hard water, and upon drying, can leave an insoluble visible deposit.
  • non-phosphate builders such as salts of citrate, carbonate, silicate, disilicate, bicarbonate, aminocarboxylates and others to sequester calcium and magnesium from hard water, and upon drying, can leave an insoluble visible deposit.
  • Polymers made from (meth)acrylic acid and maleic acid are known for use in inhibiting the scale or other insoluble deposits produced from non-phosphate builders.
  • Surfactants are amphiphilic compounds, i.e. compounds that contain hydrophobic as well as hydrophilic groups, a property which enables them to mix the hydrophobic soils from the dishes with the rinsing water.
  • Nonionic surfactants are preferably used for dish washing applications as they are known to be low or moderate foamers, mild to human skin and have superior performance in removing oily soil.
  • Nonionic surfactants are further well suited for mixing with other materials contained in the detergent formulation as they are known to be chemically inert and stable toward pH change.
  • Nonionic surfactants typically have noncharged hydrophilic headgroups and are commonly based on polyoxyethylene or a glycoside.
  • Examples 24 and 28 describe automatic zero phosphate dishwash formulations containing the copolymer, builder and bleach.
  • WO 2013/092276 describes a detergent composition comprising 20-99.7 wt.% of a continuous phase containing glutamic-N,N-diacetate (GLDA), water and optionally other components; and 0.3-80 wt.% of a dispersed phase comprising at least 0.3% of bleach particles by weight of the composition.
  • DehyponTM Wet is mentioned as an example of a nonionic surfactant that can be applied in the detergent composition.
  • US 2016/0348036 describes a zero-phosphate machine dish wash composition in unit dose format comprising
  • the machine dishwash composition may include a nonionic surfactant of the formula R 3 — (PO) x (EO)y— CH2CH(OH)— R 4 ; wherein R 3 is C 6 -Ci 5 ; R 5 is C 4 -Cio, and x is an integer in the range of 0-10, and y is an integer in the range of 3-30.
  • Suitable nonionics of this type include modified fatty alcohol polyglycolethers available as Dehypon® 3697 GRA or Dehypon® Wet from BASF.
  • WO 2014/021902 describes an ADW detergent composition containing a hybrid copolymer that is based on maltodextrin and (among others) methacrylate.
  • a hybrid copolymer that is based on maltodextrin and (among others) methacrylate.
  • compositions are described containing approximately 6 wt.% of hybrid copolymer and 3.7 wt% of Dehypon LS-36 (an ethylene oxide/propylene oxide fatty alcohol).
  • WO 2013/022762 describes ADW detergent compositions containing a hybrid copolymer that is based on maltodextrin and acrylic acid in a 1 : 1 w/w ratio. In the examples compositions are described containing 2-6 wt.% of this hybrid copolymer and 1 .7 wt.% of Pluronic N-3 (an ethylene oxide/propylene oxide block copolymer).
  • Pluronic N-3 an ethylene oxide/propylene oxide block copolymer.
  • WO 201 1/014783 describes ADW detergents that contain a hybrid copolymer that is based on maltodextrin and acrylic acid/ 2-acrylamido-2-methylpropanesulphonic acid, builder and nonionic surfactant.
  • a base that includes one or more of a sulfate, a carbonate, a citrate, and a silicate, wherein the carbonate is present in an amount less than about 25% of the composition;
  • a spot reduction system that includes (i) a polyacrylate and (ii) a
  • WO 201 1/014783 describes a scale inhibiting composition for aqueous systems, comprising an anionic hybrid copolymer composition wherein said copolymer comprises:
  • a hybrid synthetic copolymer comprising one or more synthetic polymers derived from the at least one anionic ethylenically unsaturated monomer with at least one initiator fragment as an end group, said hybrid synthetic copolymer having the structure:
  • I is the initiator fragment
  • H is a proton abstracted from the naturally derived hydroxyl containing chain transfer agent
  • Mh SC is a synthetic portion of the hybrid synthetic copolymer derived from the at least one anionic ethylenically unsaturated monomer
  • the chain transfer agent is present in amounts greater than 75% by weight to about 99% by weight, based on the total weight of the hybrid copolymer, wherein the scale inhibiting composition has a greater than 80% carbonate inhibition at a 100 ppm dosage level of the anionic hybrid copolymer composition in an aqueous system.
  • Example 1 describes detergent compositions containing a combination of protease and hybrid polymer.
  • Example 1 describes an automatic dishwashing detergent tablet that is composed of three different phases. The tablet contains builder, hybrid polymer, bleach and nonionic surfactant.
  • the inventors have developed an ADW detergent composition that combines a very good cleaning action with minimal spotting and film-forming.
  • the ADW detergent composition of the present invention consists of:
  • nonionic surfactant represented by the following formula:
  • R 1 is an linear or branched C8-C22 alkyl radical or a linear or branched C8-C22 alkylphenol radical;
  • R 2 and R 2 ' are independently selected from hydrogen and a Ci-C.5.alkyl
  • R 3 is a covalent bond or a linear, aliphatic C2-C26 alkyl radical
  • o R 4 is selected from hydrogen, and an alkyl radical having 1-15 carbon atoms; o 5 ⁇ n ⁇ 30;
  • nonionic surfactant being selected from homopolymers, statistical copolymers, block copolymers and combinations thereof;
  • the ADW detergent composition of the present invention produces very good cleaning results for earthenware, glassware, metal as well as plastic.
  • the inventors have discovered that the combination of builder, graft copolymer and nonionic surfactant represented by the above described formula very effectively minimizes spotting and film- forming.
  • a first aspect of the present invention relates to an ADW detergent composition consisting of:
  • nonionic surfactant represented by the following formula:
  • R 1 is an linear or branched C8-C22 alkyl radical or a linear or branched C8-C22
  • R 2 and R 2 ' are independently selected from hydrogen and a C1-C.5. alkyl radical, and wherein either R 2 or R 2 ' is hydrogen;
  • R 3 is a covalent bond or a linear, aliphatic C2-C26 alkyl radical
  • R 4 is selected from hydrogen, and an alkyl radical having 1 -15 carbon atoms;
  • nonionic surfactant being selected from homopolymers, statistical copolymers, block copolymers and combinations thereof;
  • builder refers to a material that is capable of removing calcium ion from aqueous solution by ion exchange, complexation, sequestration and/or precipitation.
  • builder materials include phosphates, alkali metal citrates, carbonates and bicarbonates; aminopolycarboxylates, polycarboxylates such as polymaleates, polyacetates, polyhydroxyacrylates, polyacrylate/polymaleate and polyacrylate/polymethacrylate copolymers, as well as zeolites; layered silicas and mixtures thereof.
  • surfactant refers to components within the classification described in "Surfactant Science Series", Vol.82, (1999) Handbook of detergents, part A: Properties, chapter 2 (Surfactants, classification), G. Broze (ed.).
  • bleach component refers to substances that are capable of removing coloured stains by oxidizing or reducing the colour components of the stain.
  • oxidizing bleach components include peroxides, such as hydrogen peroxide, sodium percarbonate and sodium perborate.
  • reducing bleach components include sodium dithionite, sodium borohydride and sodium sulfite.
  • the detergent composition may suitably contain bleach activators and/or bleach catalysts.
  • percarbonate refers to an adduct of alkalimetal carbonate and hydrogen peroxide (a perhydrate), such as sodium percarbonate (2Na2C03-3H2C>2).
  • carbonate refers to carbonic acid (h CO 2 ⁇ ) and salts thereof.
  • carbonate as used herein does not encompass percarbonates.
  • citrate refers to citric acid and salts thereof.
  • silicate refers to silicic acid and salts thereof.
  • polysaccharide refers to a polymeric carbohydrate molecule composed of a chain of at least 5 monosaccharide units bound together by glycosidic linkages.
  • one or more other ingredients refers to ingredients other than builder; bleach component; graft copolymer having a polysaccharide backbone and one or more side chains of one or more synthetic monomeric units; and nonionic surfactant.
  • concentration of a salt or an acid unless indicated otherwise, said concentration refers to the equivalent concentration of the salt or acid in anhydrous form.
  • the ADW detergent composition of the present invention preferably is a particulate composition or a solid article. Accordingly, the detergent composition preferably is a powder or a tablet.
  • the combination of the builder, the bleach component, the graft copolymer and the nonionic surfactant typically represents at least 40%, more preferably at least 50% and most preferably at least 60% by weight of the detergent composition.
  • the detergent composition of the present invention preferably contains the graft copolymer and the builder in a weight ratio of at least 1 :50, more preferably of 1 :40 to 1 :8 and most preferably of 1 :30 to 1 :10.
  • the graft copolymer and the nonionic surfactant are typically present in the detergent composition in a weight ratio of 1 :4 to 3:1 , more preferably of 1 :3 to 5:2 and most preferably of 1 :2.2 to 2:1 .
  • the ADW detergent composition of the present invention consists of, calculated by weight of dry matter:
  • the detergent composition typically contains at least 30 wt.% of builder, more preferably 35- 70 wt.% of builder and most preferably 40-65 wt.% of builder.
  • the builder contained in the detergent composition according to the invention comprises 20-80% of precipitating builder by weight of the builder, said precipitating builder being selected from carbonate, silicate and combinations thereof. More preferably, the detergent composition contains 25-75% of precipitating builder by weight of the builder, even more preferably 30-72% and most preferably 40-70% of precipitating builder by weight of the builder.
  • the detergent composition contains 20- 80% carbonate by weight of the builder. More preferably, the detergent composition contains 25-75%, even more preferably 30-72% and most preferably 40-70% of carbonate by weight of the builder. As explained before, these concentrations refer to the equivalent concentration of the carbonate in anhydrous form.
  • the carbonate is alkali metal carbonate, most preferably sodium carbonate.
  • the silicate content of the builder component of the detergent composition preferably is 0- 20% by weight of the builder. More preferably, the detergent composition contains 1 -10% silicate, most preferably 1.5-6% silicate by weight of the builder. As explained before, these concentrations refer to the equivalent concentration of the silicate in anhydrous form.
  • the silicate is an alkali metal silicate, most preferably sodium silicate.
  • silicates that may be applied include disilicate, metasilicate and crystalline phyllosilicates and mixtures thereof.
  • the silicate is selected from sodium disilicate, sodium metasilicate and combinations thereof.
  • the builder contained in the detergent composition according to the invention comprises 20-70% of citrate by weight of the builder. More preferably, the detergent composition contains 25-65% citrate by weight of the builder. Even more preferably, the detergent composition contains 30-60% of citrate by weight of the builder. As explained before, these concentrations refer to the equivalent concentration of the citrate in anhydrous form.
  • the citrate is alkali metal citrate, most preferably sodium citrate.
  • citrate and carbonate together constitute at least 60 wt.%, more preferably at least 70 wt.% and most preferably at least 80 wt.% of the builder.
  • the composition comprises citrate and carbonate, wherein the citrate and carbonate together constitute at least 30 wt.%, more preferably at least 35 wt.% of the detergent composition. Even more preferably the citrate and carbonate together constitute 35-75 wt.% of the detergent composition and most preferably 40-70 wt.% of the detergent composition.
  • citrate and carbonate are present in the detergent composition in a molar ratio of citrate : carbonate of 0.15 to 0.9, more preferably of 0.2-0.8 and most preferably of 0.25 to 0.6.
  • the builder comprises less than 25% by weight of the builder of builder components other than citrate, carbonate and silicate, more preferably the builder comprises less than 15%, even more preferably less than 10% by weight of the builder of builder components other than citrate, carbonate and silicate.
  • the phosphate content of the ADW detergent composition preferably is less than 10%, more preferably less than 3% and most preferably less than 1 % by weight of the builder.
  • the detergent composition contains less than 3 wt.%, more preferably less than 2 wt.% and most preferably less than 1 wt.% of
  • aminopolycarboxylate chelant examples include MGDA
  • the detergent composition of the present invention preferably comprises 7-22 wt.%, more preferably 8-20 wt.% and most preferably 9-18 wt.% of bleach component
  • the bleach component employed in the present detergent composition preferably is an oxidizing bleach component.
  • the oxidizing bleach component may suitably comprise a chlorine-, or bromine-releasing agent or a peroxygen compound.
  • the bleach component is selected from peroxides (including peroxide salts such as sodium percarbonate), organic peracids, salts of organic peracids and combinations thereof. More preferably, the bleach component is a peroxide. Examples of peroxides are acids and corresponding salts of monopersulphate, perborate monohydrate, perborate tetrahydrate, and percarbonate. Most preferably, the bleach component is a percarbonate, notably sodium percarbonate.
  • Organic peracids useful herein include alkyl peroxy acids and aryl peroxyacids such as peroxybenzoic acid and ring substituted peroxybenzoic acids (e.g. peroxy-alpha-naphthoic acid), aliphatic and substituted aliphatic monoperoxy acids (e.g. peroxylauric acid and peroxystearic acid), and phthaloyl amido peroxy caproic acid (PAP).
  • alkyl peroxy acids and aryl peroxyacids such as peroxybenzoic acid and ring substituted peroxybenzoic acids (e.g. peroxy-alpha-naphthoic acid), aliphatic and substituted aliphatic monoperoxy acids (e.g. peroxylauric acid and peroxystearic acid), and phthaloyl amido peroxy caproic acid (PAP).
  • peroxybenzoic acid and ring substituted peroxybenzoic acids e.g. peroxy-alpha-n
  • diperoxy acids useful herein include alkyl diperoxy acids and aryldiperoxy acids, such as 1 ,12 di-peroxy-dodecanedioic acid (DPDA), 1 ,9 diperoxyazelaic acid, diperoxybrassylic acid, diperoxysebacic acid and diperoxy-isophthalic acid, and 2 decyldiperoxybutane 1 ,4 dioic acid.
  • DPDA di-peroxy-dodecanedioic acid
  • the detergent composition may contain one or more bleach activators such as peroxyacid bleach precursors.
  • Peroxyacid bleach precursors are well known in the art. As non-limiting examples can be named ⁇ , ⁇ , ⁇ ', ⁇ '-tetraacetyl ethylene diamine (TAED), sodium
  • SNOBS nonanoyloxybenzene sulphonate
  • a bleach catalyst such as a manganese complex, e.g. Mn-Me TACN, as described in EP-A-0458397, or the sulphonimines of US-A-5,041 ,232 and US-A-5,047,163, can be incorporated.
  • This bleach catalyst may suitably be present in the composition in the form of an encapsulate, notably an encapsulate that is separate from the bleach particles (to avoid premature bleach activation).
  • Cobalt or iron catalysts can also be used.
  • the graft copolymer employed in accordance with the present invention has a
  • the graft copolymer contains one or more side chains of two or more, even more preferably of three or more synthetic monomeric units.
  • the graft copolymer employed in the detergent composition typically has a molecular weight of at least 4,000 g/mol, more preferably of at least 8,000 g/mol and most preferably at least 15,000 g/mol.
  • the one or more synthetic monomeric units are preferably selected from olefinically unsaturated carboxylate monomers; sulfonate monomers; phosphonate monomers and combinations thereof. More preferably, the one or more synthetic monomeric units are selected from olefinically unsaturated carboxylate monomers; sulfonate monomers and combinations thereof. Most preferably, the synthetic monomeric units are olefinically unsaturated carboxylate monomers.
  • the olefinically unsaturated carboxyate monomers include, for example, aliphatic, branched or cyclic, mono- or dicarboxylic acids, the alkali or alkaline earth metal or ammonium salts thereof, and the anhydrides thereof.
  • olefinically unsaturated carboxylic acid monomers include acrylic acid, methacrylic acid, ethacrylic acid, a-chloro-acrylic acid, o cyano acrylic acid, ⁇ -methyl-acrylic acid (crotonic acid), a-phenyl acrylic acid, ⁇ -acryloxy propionic acid, sorbic acid, a-chloro sorbic acid, angelic acid, cinnamic acid, p-chloro cinnamic acid, ⁇ -styryl acrylic acid (1 -carboxy-4-phenyl butadiene-1 ,3), itaconic acid, maleic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid, fumaric acid, tricarboxy ethylene, and 2-acryloxypropionic acid.
  • Moieties such as maleic anhydride or acrylamide that can be derivatized to an acid containing group can also be used.
  • combinations of olefinically unsaturated carboxylic acid monomers may be used.
  • the olefinically unsaturated carboxylic acid monomer is selected from acrylic acid, maleic acid, itaconic acid, or methacrylic acid and combinations thereof.
  • sulfonate monomers examples include 2-acrylamido-2-methylpropane sulfonic acid (AMPS), as well as styrene sulfonic acid, (meth-)acrylic acidsulfoalkyl esters, itaconic acid- sulfoalkyl esters, preferably in each case as Ci-C6-alkyl esters, vinyl sulfonic acid and the alkali, alkaline earth and/or ammonium salts thereof.
  • AMPS 2-acrylamido-2-methylpropane sulfonic acid
  • styrene sulfonic acid examples include 2-acrylamido-2-methylpropane sulfonic acid (AMPS), as well as styrene sulfonic acid, (meth-)acrylic acidsulfoalkyl esters, itaconic acid- sulfoalkyl esters, preferably in each case as Ci-C6-alkyl esters, vinyl s
  • AMPS 2-acrylamido-2- methylpropane sulfonic acid
  • styrene sulfonic acid acrylic acid-sulfopropyl ester
  • itaconic acid-sulfopropyl ester itaconic acid-sulfopropyl ester
  • vinyl sulfonic acid as well as in each case the ammonium, sodium, potassium and/or calcium salts.
  • the polysaccharide that forms the backbone of the graft copolymer is preferably selected from starch, maltodextrin, cellulose, gums (e.g., gum arabic, guar and xanthan), alginates, pectin and gellan. More preferably, the polysaccharide is selected from starch and maltodextrin.
  • the polysaccharides employed in the graft copolymer can be modified or derivatised by etherification (e.g., via treatment with propylene oxide, ethylene oxide, 2,3- epoxypropyl trimethyl ammonium chloride), esterification (e.g., via reaction with acetic anhydride, octenyl succinic anhydride (“OSA”)), acid hydrolysis, dextrinization, oxidation (e.g. oxidized starch) or enzyme treatment, or various combinations of these treatments.
  • etherification e.g., via treatment with propylene oxide, ethylene oxide, 2,3- epoxypropyl trimethyl ammonium chloride
  • esterification e.g., via reaction with acetic anhydride, octenyl succinic anhydride (“OSA”)
  • OSA octenyl succinic anhydride
  • acid hydrolysis e.g., dextrinization, oxidation (e.g. oxidized starch) or
  • the polysaccharide of the copolymer is maltodextrin.
  • Maltodextrins are polymers that can be produced by starch hydrolysis and that have D-glucose units linked primarily by a-1 ,4 bonds and a dextrose equivalent of less than about 20.
  • Dextrose equivalent (DE) is a measure of the extent of starch hydrolysis. It is determined by measuring the amount of reducing sugars in a sample relative to dextrose (glucose). The DE of dextrose is 100, representing 100% hydrolysis.
  • the polysaccharide in the backbone of the graft copolymer preferably contains a chain of at least 8, more preferably of at least 10 monosaccharide units bound together by glycosidic linkages
  • the graft copolymer preferably has a high degree of polysaccharide.
  • the polysaccharide represents at least 50 wt.%, more preferably at least 60 wt.%, even more preferably at least 70 wt.% and most preferably at least 80 wt.% of the graft copolymer.
  • graft copolymer that may suitably be employed in accordance with the present invention is Alcoguard® H 5240, which is commercially available from AkzoNobel®. Surfactants
  • the nonionic surfactant employed in the present detergent composition is a polyoxyalkylene condensate represented by the formula described hereinbefore: R 1 -0-(CH2CH20) n - (CHR 2 CHR 2' 0) q -(CH 2 CH(OH)R 3 )s-R 4 According to a preferred embodiment R 2 or R 2' in the above mentioned formula is selected from methyl or ethyl, most preferably R 2 or R 2' is methyl.
  • the detergent composition according to the present invention contains a nonionic surfactant which is represented by the following formula:
  • R 2 is hydrogen and R 2 is methyl; • R 3 is a covalent bond;
  • the nonionic surfactant employed in the present detergent composition preferably is a low foam nonionic surfactant.
  • low foam nonionic surfactant refers to a nonionic surfactant that at a concentration of 1 wt.% in distilled water and at a temperature of 50 °C has an initial foam height of less than 50 mm, a foam height of less 5 mm after 1 minute, and a foam height of less than 1 mm after 5 minutes in the ASTM D1 173-07 test.
  • the nonionic surfactant used typically has a cloud point of at least 25°C. More preferably the nonionic surfactant has a cloud point of 27-60°C, most preferably a cloud point of 28-50°C.
  • cloud point refers to the temperature at which the nonionic surfactant starts to precipitate from an aqueous solution.
  • the inventors have found that, a detergent composition that is not only chemically but also physically very stable can be produced if the nonionic surfactant employed is solid at all temperatures which are relevant in the logistic chain. Thus, it is preferred that the nonionic surfactant is solid below 45°C.
  • the detergent composition contains 1 .5-10%, more preferably 2-8% of the nonionic surfactant by weight of the composition.
  • the detergent composition may contain other surfactant besides the nonionic surfactant. If an anionic surfactant is used, the total amount present preferably is less than 5 wt.%, more preferably less than 2 wt.%, even more preferably less than 1 wt.% and most preferably less than 0.5 wt.%..
  • the detergent composition preferably contains at least 0.03 wt.%, more preferably at least 0.05 wt.% and most preferably 0.07-3 wt.% of one or more enzymes.
  • enzymes suitable for use in the cleaning compositions of this invention include lipases, cellulases, peroxidases, proteases (proteolytic enzymes), amylases (amylolytic enzymes) and others which degrade, alter or facilitate the degradation or alteration of biochemical soils and stains encountered in cleansing situations so as to remove more easily the soil or stain from the object being washed to make the soil or stain more removable in a subsequent cleansing step. Both degradation and alteration can improve soil removal.
  • the one or more active enzymes contained in the present composition are selected from protease, amylase, cellulase, peroxidase, mannanase, pectate, lyase and lipase.
  • the active enzyme is selected from protease, amylase and combinations thereof.
  • the composition contains at least 10 mg/kg, more preferably at least 20 mg/kg and most preferably at least 50 mg/kg of active amylase. According to another especially preferred embodiment, the composition contains at least 100 mg/kg, more preferably at least 200 mg/kg and most preferably at least 400 mg/kg of active protease.
  • Enzymes may be added in liquid or in encapsulated form.
  • encapsulated enzymes are enzyme granule types D, E and HS by Genencor and granule types T, GT, TXT and EvityTM of Novozymes.
  • the proteolytic enzymes in this invention include metalloproteases and serine proteases, including neutral or alkaline microbial serine protease, such as subtilisins (EC 3.4.21 .62).
  • the proteolytic enzymes for use in the present invention can be those derived from bacteria of fungi. Chemically or genetically modified mutants (variants) are included.
  • Preferred proteolytic enzymes are those derived from Bacillus, such as B. lentus, B. gibsonii, B.
  • subtilis subtilis, B. licheniformis, B. alkalophilus, B. amyloliquefaciens and Bacillus pumilus, of which B. lentus and B. gibsonii are most preferred.
  • proteolytic enzymes are ExcellaseTM, ProperaseTM, PurafectTM, PurafectTM Prime, PurafectTM Ox by Genencor; and those sold under the trade names BlazeTM, OvozymeTM, SavinaseTM, AlcalaseTM, EverlaseTM, EsperaseTM, RelaseTM, PolarzymeTM, LiquinaseTM and CoronaseTM by Novozymes.
  • the amylolytic enzymes for use in the present invention can be those derived from bacteria or fungi.
  • amylolytic enzyme is an alpha-amylase derived from a strain of Bacillus, such as B. subtilis, B. lichen iformis, B. amyloliquefaciens or B. stearothermophilus.
  • Examples of such amylolytic enzymes are produced and distributed under the trade name of StainzymeTM, StainzymeTM Plus, TermamylTM, NatalaseTM and DuramylTM by Novozymes; as well as PoweraseTM, PurastarTM, PurastarTM Oxam by Genencor. StainzymeTM, StainzymeTM Plus and
  • PoweraseTM are the preferred amylases.
  • Well known enzyme stabilizers such as polyalcohols/borax, calcium, formate or protease inhibitors like 4-formylphenyl boronic acid may also be present in the composition.
  • the detergent composition may suitably contain up to 70 wt.% of a filler. More preferably, the composition contains not more than 60 wt.% of filler, most preferably 10-50 wt.% of filler.
  • the filler employed is a metal sulfate, e.g. sodium sulfate.
  • Glass corrosion inhibitors can prevent the irreversible corrosion and iridescence of glass surfaces in automatic dishwash detergents.
  • the claimed composition may suitably contain glass corrosion inhibitors.
  • Suitable glass corrosion agents can be selected from the group the group consisting of salts of zinc, bismuth, aluminum, tin, magnesium, calcium, strontium, titanium, zirconium, manganese, lanthanum, mixtures thereof and precursors thereof. Most preferred are salts of bismuth, magnesium or zinc or combinations thereof.
  • Anti-tarnishing agents may prevent or reduce the tarnishing, corrosion or oxidation of metals such as silver, copper, aluminium and stainless steel.
  • Anti-tarnishing agents such as benzotriazole, methyl benzotriazole or bis-benzotriazole and substituted or substituted derivatives thereof and those described in EP 723 577 (Unilever) may also be included in the composition.
  • Other anti-tarnishing agents that may be included in the detergent composition are mentioned in WO 94/26860 and WO 94/26859.
  • Suitable redox active agents are for example complexes chosen from the group of cerium, cobalt, hafnium, gallium, manganese, titanium, vanadium, zinc or zirconium, in which the metal are in the oxidation state of II, II, IV V or VI.
  • compositions such as perfume, colorant or preservatives.
  • the other ingredients are selected from enzymes, dispersing polymers, bleaches, bleach activators, bleach catalysts, alkali carriers, corrosion inhibitors, dyes, fragrances and fillers.
  • Another aspect of the invention relates to the use of a detergent composition as defined herein before as a detergent in an automatic dishwashing apparatus.
  • the invention is further illustrated by the following non-limiting examples.
  • Automatic dishwash compositions were prepared on the basis of the formulations shown in Table 1 .
  • the aforementioned ADW detergent compositions were prepared as follows:
  • a representative set of dishes consisting of earthenware, glassware, metal and plastics is washed 30 consecutive times in a Miele 1222GSL dishwasher using the 65 °C program.
  • the detergent is dosed in the dispenser prior to every wash.
  • a cup containing 50 grams of frozen Stiwa soil is dosed manually (e.g. opening the dishwasher and putting the cup upside down in the top rack) when the dispenser opens.
  • the dishwasher After every wash the dishwasher is opened and the dishes are allowed to dry completely and cool down to room temperature. After 30 washes the dishes are evaluated.
  • the aesthetic scores were obtained by placing the dishware at 1 15 cm of a grey wall (RAL 7030) and 45 to 50 cm of the ceiling of the room.
  • the dishware is illuminated with 4 light sources type Philips master TL-D 36 W / 865 2M, 120 cm long and is evaluated on overall appearance i.e. taking into account spots, film, etc. A scale going from 1 to 10 is used, 10 corresponding to a perfect dish.
  • the performance of the ADW detergent compositions was evaluated using the same test procedure as in Example 1 , except that another set of articles was cleaned in the dishwasher, the evaluation was limited to only spotting and the total number of washes was limited to 10.

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Abstract

La présente invention concerne une composition de détergent pour lave-vaisselle automatique comprenant : * de 20 à 80 % en poids d'adjuvant de détergence ; * de 5 à 25 % en poids de composant de blanchiment ; * de 1 à 10 % en poids d'un copolymère greffé ayant un squelette polysaccharide et une ou plusieurs chaînes latérales d'une ou de plusieurs unités monomères synthétiques ; * de 1 à 15 % en poids de tensioactif non ionique représenté par la formule suivante : R1-O-(CH2CH2O)n-(CHR2CHR2'O)q-(CH2CH(OH)R3)s-R4 dans laquelle R1 est un radical alkyle linéaire ou ramifié en C8-C22 ou un radical alkylphénol linéaire ou ramifié en C8-C22 ; R2 et R2' sont indépendamment choisis parmi l'hydrogène et un radical alkyle en C1-C.5., et dans laquelle R2 ou R2' est un hydrogène ; R3 représente une liaison covalente ou un radical alkyle linéaire, aliphatique en C2-C26 ; R4 est choisi parmi l'hydrogène, et un radical alkyle ayant de 1 à 15 atomes de carbone ; 5 ≤ n ≤ 30 ; 0 ≤ q ≤ 3 ; 20 s = 1-5, ledit tensioactif non ionique étant choisi parmi les homopolymères, les copolymères statistiques, les copolymères séquencés et leurs combinaisons; et * de 0 à 60 % en poids d'un ou de plusieurs autres ingrédients. La composition de détergent selon la présente invention produit de très bons résultats de nettoyage avec un minimum de taches et de formation de film.
PCT/EP2018/062283 2017-05-12 2018-05-14 Composition de détergent pour lave-vaisselle automatique WO2018206811A1 (fr)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022243533A1 (fr) 2021-05-20 2022-11-24 Nouryon Chemicals International B.V. Polymères fabriqués présentant une fonctionnalité d'oligosaccharide ou de polysaccharide modifiée ou une distribution rétrécie d'oligosaccharides, procédés pour leur préparation, compositions les contenant et procédés pour leur utilisation
WO2023070137A1 (fr) * 2021-10-29 2023-05-04 Martin Lasnik Procédé et ensemble de nettoyage de lunettes
EP3622049B1 (fr) 2017-05-12 2023-08-16 Unilever Global IP Limited Composition de détergent de lave-vaisselle automatique sans phosphate
DE102022206583A1 (de) 2022-06-29 2024-01-04 Henkel Ag & Co. Kgaa Reinigungsmittel
WO2024213566A1 (fr) * 2023-04-14 2024-10-17 Reckitt Benckiser Finish B.V. Composition détergente pour lave-vaisselle

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3622049B1 (fr) 2017-05-12 2023-08-16 Unilever Global IP Limited Composition de détergent de lave-vaisselle automatique sans phosphate
WO2022243533A1 (fr) 2021-05-20 2022-11-24 Nouryon Chemicals International B.V. Polymères fabriqués présentant une fonctionnalité d'oligosaccharide ou de polysaccharide modifiée ou une distribution rétrécie d'oligosaccharides, procédés pour leur préparation, compositions les contenant et procédés pour leur utilisation
WO2023070137A1 (fr) * 2021-10-29 2023-05-04 Martin Lasnik Procédé et ensemble de nettoyage de lunettes
DE102022206583A1 (de) 2022-06-29 2024-01-04 Henkel Ag & Co. Kgaa Reinigungsmittel
WO2024213566A1 (fr) * 2023-04-14 2024-10-17 Reckitt Benckiser Finish B.V. Composition détergente pour lave-vaisselle

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