EP3268459A1 - Compositions de nettoyage concentrées stables pour surfaces dures - Google Patents

Compositions de nettoyage concentrées stables pour surfaces dures

Info

Publication number
EP3268459A1
EP3268459A1 EP16707122.4A EP16707122A EP3268459A1 EP 3268459 A1 EP3268459 A1 EP 3268459A1 EP 16707122 A EP16707122 A EP 16707122A EP 3268459 A1 EP3268459 A1 EP 3268459A1
Authority
EP
European Patent Office
Prior art keywords
compositions
composition
viscosity
aqueous cleansing
carbonate
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP16707122.4A
Other languages
German (de)
English (en)
Other versions
EP3268459B1 (fr
Inventor
Sumanth Kumar ARNIPALLY
Manoj Vilas Dagaonkar
Jiji Paul Kottukapally
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
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 PLC, Unilever NV filed Critical Unilever PLC
Publication of EP3268459A1 publication Critical patent/EP3268459A1/fr
Application granted granted Critical
Publication of EP3268459B1 publication Critical patent/EP3268459B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/37Mixtures of compounds all of which are anionic
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02Inorganic compounds ; Elemental compounds
    • C11D3/12Water-insoluble compounds
    • C11D3/1233Carbonates, e.g. calcite or dolomite
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/29Sulfates of polyoxyalkylene ethers

Definitions

  • the invention is in the field of dilutable concentrated aqueous cleansing compositions for hard surface cleaning, especially dishwashing.
  • Aqueous dishwash compositions are now used in many countries and their use is expected to increase in the coming years. Such compositions usually contain about 50 to 70 wt% water. The balance is usually made up of anionic surfactants, in particular alkylbenzene sulphonates and ethoxylated sulphates, some amount of magnesium sulphate for grease removal, perfume, colour and other additives. Some products may also contain an alkaline ingredient like sodium carbonate.
  • compositions of GB1 164854 (Cook et.al., 1969) are stabilised by way of metal salts like chlorides and sulphates of Zinc, Magnesium, Aluminium and Calcium.
  • compositions of EP2770044 A1 (Unilever, 2014) are lamellar gels having alkyl benzene sulphonate and (poly)ethoxylated alkyl sulphate in the ratio of 4:1 to 1 :1. They are free of any alkali, in particular, sodium carbonate.
  • the compositions contain at least 1 wt% amine oxide and 1 to 12 wt% electrolyte with at least 2 wt% performance additives.
  • US4692275 A discloses powder detergent compositions with a mixed surfactant system containing a Cs-Cis alkylbenzene sulphonate and C12-C18 alcohol ethoxysulphate.
  • the total surfactant content is up to 20 wt% and the ratio of sulphonate to sulphate is from 3.5:1 to 1.5:1 .
  • An alkaline material such as sodium carbonate is included in aqueous concentrated dishwash compositions in order to increase the pH and provide enough reserve alkalinity for better degreasing. It helps to include high levels of sodium carbonate in order to formulate a stable concentrated cleansing product.
  • the benefits tend to be offset by instability and none of the prior art discussed earlier provide a useful solution for alkaline compositions.
  • an aqueous cleansing composition comprising one part by weight of the composition of the first aspect and one to three parts by weight of water.
  • the mixed anionic surfactant system The concentrated aqueous cleansing compositions of the invention comprise 14 wt% to 35 wt% of a mixed anionic surfactant system containing alkyl benzenesulphonate and (poly)ethoxylated sulphate .
  • the surfactants assist in removing soil and grease from utensils and also assist in maintaining the soil in solution or suspension in the wash liquor.
  • alkylbenzene sulphonate is a linear alkylbenzene sulphonate having alkyl chain length of C8-C20.
  • the counter ion for anionic surfactants is an alkali metal, typically sodium, although instead of alkali metals, other amine based counter ions can also be present.
  • Preferred linear alkyl benzene sulphonate surfactants include sodium salt of alkyl benzene sulphonates with an alkyl chain length of from 8 to 15, more preferably 12 to 14.
  • the mixed anionic surfactant system also has a (poly)ethoxylated sulphate.
  • General formula of such surfactants is RO(C2H40) x SO3 " M + where R is an alkyl chain having from 10 to 22 carbon atoms, saturated or unsaturated, M is a cation which makes the compound water-soluble, especially an alkali metal, ammonium or substituted ammonium cation, and x averages from 1 to 15.
  • R is an alkyl chain having from 12 to 16 carbon atoms
  • M is sodium and x averages from 1 to 3, preferably x is 1 ;
  • the ratio of (a):(b), i.e., the ratio of the total amount of alkyl benzene sulphonate to the total amount of (poly)ethoxylated sulphate is from 1 :1 to 3:1 parts by weight.
  • compositions according to the invention have 15 wt% to 35 wt% of the mixed anionic surfactant system. More preferred compositions have 15 wt% to 30 wt%. When the total amount of anionic surfactant is more than 35 wt% or less than 12 wt%, there is no appreciable change in viscosity of the composition as a function of temperature.
  • Sodium carbonate provides high pH and high reserve alkalinity which is useful for degreasing.
  • Non-carbonate builder
  • compositions comprising the total non-carbonate builder content should be less than 1 wt%.
  • the primary function of a builder is to regulate the hardness of water so as to reduce the extent of scum.
  • the non-carbonate builder is a zeolite, phosphate, pyrophosphate, silica, succinate, carboxylate, malonate, polycarboxylate, nitrilo triacetic acid, citric acid or a salt thereof, a soap or an acetate.
  • the non-carbonate builders usually provide some degree of stability to the compositions. Therefore when the compositions contain more than 1 wt% non-carbonate builder, there is not much difference between the initial and final viscosity of the compositions.
  • Water insoluble particles Water insoluble particles:
  • the concentrated aqueous cleansing compositions of the invention comprises very limited amount of, i.e., up to 2 wt% insoluble particulate matter other than the non-carbonate builder.
  • particulate matter may include an abrasive or may even be a silicate like sodium silicate.
  • the compositions may contain one type of particulate matter or a mixture of different particles while still being inside the range of up to 2 wt% of the total composition. Whenever such particles are present, it is preferred that Moh's index of such particulate matter is in the range of 2.5 to 6.0.
  • the particulate matter could be one or more of clay, calcite, dolomite, olive stone, feldspar, apatite, fluorite and hematite, kyanite, magnetite, orthoclase and pumice. Whenever present, the average particle size of such particles is 0.5 ⁇ to 400 ⁇ , more preferably 10 ⁇ to 200 ⁇ .
  • the concentrated aqueous cleansing compositions in accordance with the invention comprise 40 wt% to 80 wt% water. More preferred compositions comprise 50 wt% to 75 wt% water. Optimal compositions have 60 wt% to 75 wt% water.
  • the concentrated aqueous cleansing compositions of the invention may further comprise other surfactants over and above the mixed anionic surfactant system described earlier.
  • additional surfactants may have no influence or limited influence on the viscosity profile of the composition.
  • the compositions of this invention may comprise further surfactants selected from amphoteric, zwitterionic and nonionic surfactants and combinations thereof. Cationic surfactants are not preferred.
  • Such additional surfactants preferably are surfactants other than anionic surfactants because the compositions already contain significant amount of anionic surfactants for cleaning performance. Examples of such further surfactants suitable for inclusion herein can be found in "Surface Active Agents" Vol. 1 , by Schwartz & Perry, Interscience 1949, Vol.
  • the concentrated aqueous cleansing compositions of the invention may optionally comprise other ingredients, such as fragrances, preservatives and colorants, foam boosting agents, preservatives (e.g. bactericides), pH buffering agents,
  • polyelectrolytes anti-oxidants, anti-corrosion agents, anti-static agents.
  • compositions may further comprise colorants, pearlisers and/or opacifiers.
  • the viscosity of the concentrated aqueous cleansing compositions according to the invention is in the range of 500 cp to 10000 cp.
  • the viscosity is in the range of 700 cP to 10000 cP and more preferably it is in the range of 800 cP to 10000 cP.
  • the concentrated aqueous cleansing composition forms a ready-to-use dish wash liquid. This is particularly useful against greasy soil. This diluted composition is non-gelling.
  • Viscosity of the diluted aqueous cleansing composition is in the range of 100 cP to 4000 cP. Preferably it is in the range of 300 cP to 2000 cP. More preferably it is in the range of 500 cP to 1200 cP.
  • the viscosity measurements are done at 25 °C at a shear rate from 1 s "1 to 50 s ⁇
  • a Haake ® AR1000 Rheometer with cone and plate assembly is used for the
  • the initial viscosity of the compositions is measured at room temperature (25 °C). This viscosity is usually measured as soon as the compositions are prepared. Thereafter the compositions are exposed to low temperature for some time and then allowed to equilibrate again with the room temperature as above. Viscosity is measured again (final viscosity). Ideally, there should be no difference between the initial and the final viscosity. However that is not the case because usually there is a difference. The comparison can be indicated in a number of ways but usually it is quite common to indicate it as percentage recovery. Recovery of 100% is ideal but any recovery falling within the range of 99 % to 70 % (of the initial viscosity) is still considered to be normal and acceptable.
  • the initial viscosity is 1000 cP and the final viscosity is 750 cP, it would be considered to be acceptable because the recovery is 75%. However if the final viscosity is 600 cP then the recovery is 60 % which is outside the range.
  • the pH of the concentrated aqueous cleansing compositions according to the invention is in the range of 1 1 to 13.
  • the method of cleaning any hard surface such as soiled dishes using the diluted form of the concentrated composition is not different from the usual method.
  • a method would include a step of contacting a soiled plate with an efficacious amount of the composition preferably with the help of a scrubber or implement such as sponge, scouring pad or cloth, followed by scrubbing and later by rinsing with water.
  • a scrubber or implement such as sponge, scouring pad or cloth
  • the concentrated aqueous cleansing compositions of the invention, or its diluted variant may be made available to users in the form of a pre-impregnated implement.
  • the concentrated aqueous cleansing compositions according to the invention are formulated to permit easy viscosity control by the consumer upon dilution with water.
  • the cleaning liquid may be sold in concentrated form and, upon dilution by the consumer, display stable viscosity over a wide range of activity levels, the activity levels reducing with increased dilution.
  • the concentrated aqueous cleansing compositions can easily be diluted by the consumer at home by combining with water and inverting or gently shaking the container, which reliably forms a homogeneous non-gelling diluted composition.
  • compositions according to the invention are generally suitable for use in dish wash applications for manual or machine assisted cleaning, the compositions may also be used for other related applications like fabric cleaning and general hard surface cleaning.
  • Example-1 Effect of ratio and the amount of mixed anionic surfactant system
  • a series of concentrated aqueous dish wash compositions containing from 18 wt% to 35 wt% of the mixed anionic surfactant system were made.
  • the compositions were formulated with only two anionic surfactants; Na-LAS was the alkyl benzenesulphonate (a) and SLES 1 EO was the (poly)ethoxylated sulphate (b).
  • the total amount of sodium carbonate was kept constant but in order to ascertain the effect of ratio between the said surfactants, the ratio was varied from 1 :1 to 3.5:1 parts by weight as described hereinafter. All the compositions did not contain any non-carbonate builder. Further, all the compositions were free of insoluble particulate matter other than the builder. Some compositions were outside the invention and some were inside. The compositions were prepared in a standard manner well known in the art. Details are provided in table 1.
  • the viscosity was measured at 25°C at shear rate from 1 s "1 to 50 s _ as soon as the compositions were prepared. This was recorded as the initial viscosity.
  • compositions were stored at 5 °C for 12 hours and then immediately thawed for 3 hours, i.e., kept at 25°C so as to equilibrate with the room temperature.
  • the viscosity of each composition was then measured again under variable shear rate as above. This was recorded as the final viscosity and these two values were used to determine the extent of "recovery" of viscosity.
  • Table 2 summarises the viscosity profile of composition 1.
  • Table 3 summarises the viscosity profile of composition 2.
  • composition 5 which also is outside the invention (in view of sodium silicate) is shown in table 6.
  • compositions 6, 7, 8 and 9 The data pertaining to viscosity of the compositions within the scope of the invention (i.e., compositions 6, 7, 8 and 9) is shown below.
  • the recovery was at least 70%. This can be attributed to the ratio of a:b which was 2:1.
  • composition 7 The data pertaining to composition 7 is summarized in table 8. In this case the ratio was 1 :1 and the total amount of anionic surfactant was 24 wt%.
  • the minimum recovery was close to 90%.
  • composition 8 The data pertaining to composition 8 is summarized in table 9 below. In this case the ratio was 2:1. The total amount of anionic surfactant was 18 wt%. Table 9
  • the data indicates about 90% recovery. It was much more than the minimum level of 70%.
  • composition 9 is summarised in table 10.
  • the ratio of a:b was 1 :1 and the total amount of anionic surfactant was 18 wt%.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

L'invention concerne une composition de nettoyage aqueuse concentrée comprenant : (i) de 14 à 35 % en poids d'un système de tensioactif anionique mixte contenant du benzène sulfonate d'alkyle (a) et du sulfate (poly)éthoxylé (b) ; (ii) au moins 12 % en poids de carbonate de sodium; et (iii) une teneur totale en adjuvant de détergence non carbonate de moins de 1 % en poids, le rapport de (a) sur (b) valant de 1:1 à 3:1 parties en poids.
EP16707122.4A 2015-03-09 2016-03-01 Compositions de nettoyage concentrées stables pour surfaces dures Active EP3268459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15158144 2015-03-09
PCT/EP2016/054298 WO2016142211A1 (fr) 2015-03-09 2016-03-01 Compositions de nettoyage concentrées stables pour surfaces dures

Publications (2)

Publication Number Publication Date
EP3268459A1 true EP3268459A1 (fr) 2018-01-17
EP3268459B1 EP3268459B1 (fr) 2018-06-20

Family

ID=52736826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16707122.4A Active EP3268459B1 (fr) 2015-03-09 2016-03-01 Compositions de nettoyage concentrées stables pour surfaces dures

Country Status (4)

Country Link
EP (1) EP3268459B1 (fr)
AR (1) AR103878A1 (fr)
WO (1) WO2016142211A1 (fr)
ZA (1) ZA201706042B (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA684595B (fr) 1967-08-25
NZ191283A (en) * 1978-08-21 1982-03-09 Colgate Palmolive Co Stable pourable heavy-duty built liquid detergent comprising optical brightening agent or water soluble dye
US4260528A (en) 1979-06-18 1981-04-07 Lever Brothers Company Aqueous high viscosity liquid dishwasher compositions
US4469605A (en) * 1982-12-13 1984-09-04 Colgate-Palmolive Company Fabric softening heavy duty liquid detergent and process for manufacture thereof
US4692275A (en) 1986-04-23 1987-09-08 Lever Brothers Company Detergent compositions containing an alkylbenzene sulfonate and alcohol ethoxysulfate surfactant system
US5602092A (en) 1994-07-06 1997-02-11 Colgate-Palmolive Company Concentrated aqueous liquid detergent compositions containing deflocculating polymers
US6277803B1 (en) 2000-06-28 2001-08-21 Colgate-Palmolive Company Thickened cleaning composition
GB0031827D0 (en) * 2000-12-29 2001-02-14 Unilever Plc Detergent compositions
US6337312B1 (en) * 2001-05-11 2002-01-08 Colgate-Palmolive Co Liquid crystal compositions comprising an abrasive and magnesium sulfate heptahydrate
US20090023625A1 (en) * 2007-07-19 2009-01-22 Ming Tang Detergent composition containing suds boosting co-surfactant and suds stabilizing surface active polymer
DE102012222186A1 (de) * 2012-12-04 2014-06-05 Henkel Ag & Co. Kgaa Strukturiertes Reinigungsmittel mit Fließgrenze
EP2770044A1 (fr) 2013-02-20 2014-08-27 Unilever PLC Gel lamellaire avec un oxyde d'amine

Also Published As

Publication number Publication date
AR103878A1 (es) 2017-06-07
WO2016142211A1 (fr) 2016-09-15
EP3268459B1 (fr) 2018-06-20
ZA201706042B (en) 2019-01-30

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