EP4155371A1 - Mono-rhamnolipidreiche zusammensetzung - Google Patents

Mono-rhamnolipidreiche zusammensetzung Download PDF

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Publication number
EP4155371A1
EP4155371A1 EP22192529.0A EP22192529A EP4155371A1 EP 4155371 A1 EP4155371 A1 EP 4155371A1 EP 22192529 A EP22192529 A EP 22192529A EP 4155371 A1 EP4155371 A1 EP 4155371A1
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EP
European Patent Office
Prior art keywords
rhamnolipids
mono
cleaner
water
composition
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.)
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Application number
EP22192529.0A
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English (en)
French (fr)
Inventor
Jakob Müller
Alexandra Trambitas
Konrad GRYGIEL
Jochen Kleinen
Monica Desiree VAN LOGCHEM
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Evonik Operations GmbH
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Evonik Operations GmbH
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Priority to EP22192529.0A priority Critical patent/EP4155371A1/de
Publication of EP4155371A1 publication Critical patent/EP4155371A1/de
Withdrawn legal-status Critical Current

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    • 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
    • C11D1/02—Anionic compounds
    • C11D1/04—Carboxylic acids or salts thereof
    • C11D1/06—Ether- or thioether carboxylic acids
    • 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
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0036—Soil deposition preventing compositions; Antiredeposition agents

Definitions

  • the invention relates to the use of a composition rich in mono-rhamnolipids for the preparation of non-cosmetic cleaning formulations.
  • EP3418388 discloses cells and nucleic acids and also use thereof for producing rhamnolipids, and also methods for producing rhamnolipids.
  • EP3261611 discloses a composition comprising at least one rhamnolipid and at least one siloxane, wherein the weight ratio of rhamnolipid to siloxane is from 5,000,000:1 to 100:1.
  • WO2015091294 discloses a bacteriostatic composition
  • a rhamnolipid comprising at least 50 wt-% mono-rhamnolipid.
  • WO2021190993 discloses compositions containing 2 to 6 parts by weight of at least one rhamnolipid, 1 to 4 parts by weight of at least one alkyl polyglycoside, and 1 to 3 parts by weight of at least one acyl lactylate.
  • EP2787065 discloses detergent formulations for textiles, comprising rhamnolipids, where the content of di-rhamnolipids predominates, and to the use of certain rhamnolipid mixture compositions and of the aforementioned detergent formulations for increasing the rate of foam formation and/or for foam stabilization, and to the use of rhamnolipids for preventing the greying of a textile.
  • the present invention therefore provides the use of a composition rich in mono-rhamnolipids for the preparation of non-cosmetic cleaning formulations
  • the invention further provides the use of a composition rich in mono-rhamnolipids as anti-deposition aid, preferably on textiles, and/or for preventing the greying of a textile.
  • the invention further provides the use of a composition rich in mono-rhamnolipids for fatty stain removal preferably from hard surfaces.
  • compositions according to the invention with an increased content of mono-rhamnolipids can have an outstanding cleaning performance, preferably coupled with the retention of the structure of suede.
  • compositions of the instant invention have a very good cleaning performance, especially in fatty stain removal from fabrics and also from hard surfaces.
  • compositions according to the instant invention have improved cleaning properties of surfaces.
  • compositions of the instant invention support enzyme stability in terms of storage.
  • compositions according to the invention with an increased content of mono-rhamnolipids can eliminate undesired odours from surfaces, like textiles but also hard surfaces, like for example tiles.
  • compositions according to the invention with an increased content of mono-rhamnolipids can leave behind a good, smooth and soft skin feel when used during manual hard surface cleaning, eg like dish washing or car cleaning, or manual textile care processes.
  • compositions according to the invention with an increased content of mono-rhamnolipids can give rise to a large amount of foam in surface-active formulations.
  • compositions according to the invention with an increased content of mono-rhamnolipids are able to give rise to a readily spreadable foam, in particular on hard surfaces and textiles, in surface-active formulations.
  • compositions according to the invention with an increased content of mono-rhamnolipids can bring about increased shine on hard surfaces such as, for example, plastic and glass, preferably with a simultaneously exceptional cleaning performance.
  • compositions according to the invention with an increased content of mono-rhamnolipids can have an outstanding cleaning performance coupled with a good rewettability of textiles.
  • compositions of the instant invention with an increased content of mono-rhamnolipids can be rinsed off from a surface, preferably from fibres, that had been cleaned, very easily.
  • compositions of the instant invention with an increased content of mono-rhamnolipids support enzyme stability in terms of storage.
  • One advantage of the present invention is that a pure biological composition can be provided with all ingredients being of biological origin by the composition of the instant invention with an increased content of mono-rhamnolipids.
  • composition of the instant invention with an increased content of mono-rhamnolipids that a high-performance detergent can be provided, which uses less ingredients. Thereby, the formulation complexity is reduced greatly, resulting in a simpler production process.
  • composition of the instant invention with an increased content of mono-rhamnolipids shows especially good emulsification and dispersing properties.
  • Another advantage of the present invention is that detergents using mild surfactants with low aqua toxicity are provided by the composition of the instant invention.
  • composition of the instant invention with an increased content of mono-rhamnolipids can be diluted very easily with water without the necessity of excessive stirring.
  • compositions according to the instant invention have a positive odour profile.
  • compositions of the instant invention with an increased content of mono-rhamnolipids have an improved colour stability.
  • compositions of the instant invention with an increased content of mono-rhamnolipids cause reduced irritation for human skin.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids are very mild and have a good physiological compatibility, in particular characterized by a high value in the red blood cell (RBC) test.
  • RBC red blood cell
  • compositions according to the instant invention with an increased content of mono-rhamnolipids have an outstanding microbial stability.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids have an improved ability to dissolve oils and fats.
  • One advantage of the present invention is that persistent, dried-on stains are removed very efficiently at low ambient temperatures by the compositions according to the instant invention with an increased content of mono-rhamnolipids.
  • Another advantage of the present invention is that detergents with less total surfactant load while maintaining cleaning capabilities are provided by the compositions according to the instant invention with an increased content of mono-rhamnolipids.
  • Another advantage of the present invention is that a detergent with increases performance, especially on fatty stains is provided by the compositions according to the instant invention with an increased content of mono-rhamnolipids.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids a high-performance detergent is provided, which uses less ingredients. Thereby, the formulation complexity is reduced greatly, resulting in a simpler production process.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids show especially good emulsification and dispersing properties.
  • Another advantage of the present invention is that detergents using mild surfactants with low aqua toxicity are provided by the compositions according to the instant invention with an increased content of mono-rhamnolipids.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids can be formulated as 100 % biodegradable.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids show excellent compatibility with all materials contained in washing machines and other cleaning devices with respect to corrosion.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids do not lead to stress cracking of various plastic materials such as: polyetehrylenterephatalate, Plexiglas, polycarbonate, acrylnitril-butadien-styrol, polyamide, polypropylene, polyamide, polypropylene, polybutylterephtalate, polyoxymethylene:
  • plastic materials such as: polyetehrylenterephatalate, Plexiglas, polycarbonate, acrylnitril-butadien-styrol, polyamide, polypropylene, polyamide, polypropylene, polybutylterephtalate, polyoxymethylene:
  • the compositions according to the instant invention with an increased content of mono-rhamnolipids can be used to hinder the stress cracking effect by other surfactant system e.g. fatty alcohol alkoxylate.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids can be diluted very easily with water without the necessity of excessive stirring.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids cause a good skin feel during and after cleaning step
  • compositions according to the instant invention have an improved ability to dissolve oils and fats.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids lead to a higher viscosity in formulations.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids lead to colour protection for fabrics when used in a laundry detergent.
  • compositions according to the instant invention with an increased content of mono-rhamnolipids are capable of removing starchy soiling without needing to use enzymes.
  • the present invention therefore provides the use of a composition comprising at least 92 wt-%, preferably at least 95 wt.-%, more preferably at least 99 wt.-%, mono-rhamnolipids, wherein the weight percentages refer to all rhamnolipids comprised in the composition, for the preparation of a non-cosmetic cleaning formulation.
  • rhamnolipids in the context of the present invention preferably is understood to mean particularly compounds of the general formula (I) and salts thereof, where
  • Rhamnolipids applicable in the context of the instant invention can also be produced by fermentation of Pseudomonas, especially Pseudomonas aeruginosa, which are preferably non genetically modified cells, a technology already disclosed in the eighties, as documented e.g. in EP0282942 and DE4127908 .
  • Rhamnolipids produced in Pseudomonas aeruginosa cells which have been improved for higher rhamnolipid titres by genetical modification can also be used in the context of the instant invention; such cells have for example been disclosed by Lei et al. in Biotechnol Lett. 2020 Jun;42(6):997-1002 .
  • Rhamnolipids produced by Pseudomonas aeruginosa are commercially available from Jeneil Biotech Inc., e.g. under the tradename Zonix,from Logos Technologies (technology acquired by Stepan), e.g. under the tradename NatSurFact, from Biotensidion GmbH, e.g. under the tradename Rhapynal, from AGAE technologies, e.g. under the name R90, R95, R95Md, R95Dd, from Locus Bio-Energy Solutions and from Shanghai Yusheng Industry Co. Ltd., e.g. under the tradename Bio-201 Glycolipids.
  • the use according to the instant invention is characterized in that the cleaning formulation is a laundry formulation, a dish washing formulation, a car cleaning formulation, a hard floor cleaning formulation, a glass cleaner, a bathroom cleaner, a kitchen cleaner, an over cleaner, an all purpose cleaner, a wet wipe, a metal cleaner, a membrane cleaner for food and beverage applications, a CIP (cleaning in place) cleaner, a big kitchen cleaner, a traffic film remover, a carpet cleaner, an alkaline cleaner, a prespotter, a mild cleaner or a neutral cleaner.
  • the cleaning formulation is a laundry formulation, a dish washing formulation, a car cleaning formulation, a hard floor cleaning formulation, a glass cleaner, a bathroom cleaner, a kitchen cleaner, an over cleaner, an all purpose cleaner, a wet wipe, a metal cleaner, a membrane cleaner for food and beverage applications, a CIP (cleaning in place) cleaner, a big kitchen cleaner, a traffic film remover, a carpet cleaner, an alkaline cleaner, a prespot
  • the use according to the instant invention is characterized in that the surface or fabrics of the article are cleaned from natural and synthetic fats and/or oils, traffic films, dust, food rests, enzyme relevant stains, bleach relevant stains, pigment containing soils, blood, milk, carbon black and/or starch soil.
  • the present invention further provides the use of a composition comprising at least 92 wt-%, preferably at least 95 wt.-%, more preferably at least 99 wt.-%, mono-rhamnolipids, wherein the weight percentages refer to all rhamnolipids comprised in the composition, as anti-deposition aid, preferably on textiles, and/or for preventing the greying of a textile.
  • the present invention further provides the use of a composition comprising at least 92 wt-%, preferably at least 95 wt.-%, more preferably at least 99 wt.-%, mono-rhamnolipids, wherein the weight percentages refer to all rhamnolipids comprised in the composition, for fatty stain removal preferably from hard surfaces.
  • the preculture in a shake flask was carried out as described in WO2012013554A1 .
  • a mineral medium (M9) was likewise employed.
  • the glucose feed input takes place by reference to the dissolved oxygen signal.
  • the dissolved oxygen was regulated at 20% saturation via the stirrer speed.
  • the pH is regulated to 7 via a pH electrode and addition of 2M sulphuric acid or a 20% by weight ammonia solution .
  • the defoamer DOW Corning 1500 was added as required.
  • the fermentation was conducted over 4 days to a dry biomass of 15 g/l.
  • the rhamnolipid concentration was determined by HPLC and was 9.8 g/l.
  • the fermentation broth was adjusted to a pH of 3.1 by adding concentrated H 2 SO 4 . Renewed centrifugation at 500 g gave a pasty solid concentrate with a RL fraction of 45% by weight and with a viscosity of > 10 000 mPas.
  • Rhamnolipid species detected by means of HPLC were: RL total [%] (HPLC) 91 diRL-C8C10 13.9 monoRL-C8C10 0.51 diRL-C10C10 61.4 monoRL -C10C10 1.4 diRL-C10C12:1 5.9 diRL-C10C12 5.5 other RL 2.2
  • the 35% by weight rhamnolipid solution prepared as described above was diluted to 1 % by adding water. Two litres of this solution were heated to 50°C. With gentle stirring, 200 units of a thermostable rhamnosidase (ThermoActiveTM Rhamnosidase A, Prokazyme) were added and the reaction was carried out overnight. After 20 h, a sample of the solution was analysed by means of HPLC. The di-rhamnolipid had been completely converted to mono-rhamnolipid and rhamnose. Then, the enzyme was deactivated for one hour at 80°C. The entire mixture was then freeze-dried. The freeze-dried product was adjusted to a mono-rhamnolipid active content of 35% by weight by adding water.
  • ThermoActiveTM Rhamnosidase A Prokazyme
  • Benchmark 1 was purchased from supermarket
  • exemplary formulations (Detergent 1 and Benchmark 2 and 3) were prepared according to the following protocol. Initially, water and sodium hydroxide required for saponification of fatty acids were introduced into a glass beaker of suitable size. The mixture was heat up to 60°C under vigorous stirring using magnetic stirrer. Subsequently, fatty acids were preconditioned to temperature 50°C and slowly added into the sodium hydroxide solution. After the full portion of fatty acid was added into water, the solution was stirred for one hour at temperature between 65 and 80°C followed by cooling for 30 minutes to room temperature. Afterwards, further constituents (except enzyme cocktail) were added at room temperature and under vigorous stirring. The ingredients were added in no specific or uniform sequence as the order of addition to the solution was not critical.
  • any remaining amount of water was introduced to ensure desired concentration of ingredients. All ingredients were mixed using a magnetic stirrer and pH of the solution was adjusted to 8.0 by addition of sodium hydroxide. Finally, enzyme cocktail was added in the solution under vigorous stirring. The mixture was then stirred for 5 minutes to ensure a homogenous solution.
  • the exemplary compositions were easily pourable and stable at room temperature for extended period.
  • Benchmark 1 (Commercial product) Ingredient Benchmark 1 Texapon N70 4.2% Dehydol LT7 12.3% Glyceryl Cocoate Peg 30 8.4 Potassium Oleate 8.0% Polyquarternium PQ 6 0.5% Sodium citrate 8.0% Lactic Acid 3.0% Perfume 0.5% Ethanol (denatured, 96%) 8.5% Glycerin 6.0% Liquanase,2.5 L 0.5% Stainzyme Plus 12 L 0.2% Celluclean 4500 L 0.2% Add water to 100 % pH 7.95
  • the stain removal test and whiteness grade test have been carried out: 2 cycles (replicates) for the stain removal for 14 standard stains plus 8 additional fat stains, following A.I.S.E test (reduced version); and 6 consecutives cycles for whiteness grade assay with four different textiles (Polyamide, Polyester, Polyester:Cotton and Cotton). This test has been done at 30°C.
  • the protocol that has been followed for this comparison is the A.I.S.E. test published on its website and named "Minimum protocol for comparative detergent tests".
  • a programmable Miele electronic household washing machine has been used for the development of this test. Fuzzy logic type control has been disabled.
  • the selected program for performance test has been Cotton, 30°C and 1200rpm for the centrifugation process.
  • the dosage of the samples was 50mL for each formulation and following the commercial instructions of benchmarks products.
  • the water used had a water hardness of 14 ° yer Haerte.
  • Stain removal results are expressed as the mean of value Y between two replicates and its standard deviation. The better the soil removal, the larger the Y value.
  • Whiteness degree has been evaluated by Y-value in four standard textiles (Polyamide, Polyester, Polyester:Cotton and Cotton) through 6 consecutive washes. Also here: The better the soil removal, the higher the Y value.
  • a set of 14 current A.I.S.E. stains set for each replicate was used (purchased form CFT, MON-AISE A+B).
  • the different stains are: Stains Stain classes (Consumer denomination / chemical nature) Fruit juice Drink/Bleachable Tee Drink/Bleachable Grass General soil/Bleachable - enzymatic Unused motor oil Grease, oil/Greasy particulate Make up Cosmetic/Greasy particulate Red wine Drink/Bleachable Coffee Drink/Bleachable Tomato Puree Food/Bleachable Salad Dressing/Balsamico Food/Bleachable-Enzymatic Blood General Soil/Enzymatic French Squez Mustard Food/Bleachable-Enzymatic Chocolate Food/Enzymatic Grass/Mud General Soil/Bleachable-enzymatic- particulate Beef fat Grease, oil/Greasy - Enzymatic
  • a set of 8 fatty stains set for each replicate was used.
  • the different stains are: Stains Lipstick diluted red (instead of another make up stain) Grease, oil/Greasy - Enzymatic C-S-216 Carbon black/ olive oil Grease, oil/Greasy E-106 IEC carbon black/mineral oil Grease, oil/Greasy C-01 Butterfat with colorant Grease, oil/Greasy - Enzymatic C-S-10 High discriminative sebum Grease, oil/Greasy - Enzymatic C-S-132 Olive oil with chlorophyl Grease, oil/Greasy - Enzymatic C-04 Beef fat, colored with sudan red Grease, oil/Greasy - Enzymatic C-S-61 50%lard, 50%Beef fat with colorant Grease, oil/Greasy - Enzymatic C-S-63s
  • Performance results in stain removal properties Cleaning performance results on 14 AISE stains for tested compositions and benchmarks STAIN PART 1 Benchmark 1 Benchmark 2 Detergent 1 Average Average Average Fruit Juice 1 56,66 56,87 57,47 Tea 2 65,11 64,58 66,43 Grass 3 72,06 72,47 71,67 Motor oil 4 60,07 57,9 66,03 Make up 5 66,49 67,14 67,16 Red Wine 6 51,04 50,96 53,49 Coffee 7 53,63 55,8 55,37 Tomato Puree 8 66 73,5 70,54 Salad Dressing Balsamico 9 61,09 57,6 59,01 Blood 10 61,66 70,96 73,29 Freench squez mustard 11 76,95 74,66 74,62 Chocolate 12 54,36 54,52 55,11 Grass/mud 13 37,7 51,78 49,23 Beef fat 14 70,36 71,72 78,01 %stain removal (AISE stains
  • composition according to the instant invention delivers superior cleaning results to the commercial (Benchmark 1) and internal benchmark (Benchmark 2).
  • Detergent 1 achieved an average of 53,78 % stain removal (for the 8 additional fatty stains) and 64.1 % stain removal (for the 14 AISE stains) compared to the two benchmarks: Benchmark 1: 47,78 % stain removal (for the 8 additional fatty stains) and 59,95 % stain removal (for the 14 AISE stains); Benchmark 2: 49,95 % stain removal (for the 8 additional fatty stains) and 62,89 % stain removal (for the 14 AISE stains).
  • mono-rhamnolipids containing detergent provides surprisingly superior performance.
  • the object of invention the is showing better stain removal performance in laundry cleaning application than traditional surfactants and even better than the di-rhamnolipid based detergents (Benchmark 2).
  • the composition according to the instant invention surprisingly delivers better results than the two benchmarks (Benchmark 1 and Benchmark 2). Especially in the case of polyester fabrics the performance is even better than the Benchmark 2, containing the di-rhamnolipid.
  • This example demonstrates perceived rinsability of surfactants and surfactant-based formulations from skin, simulating rinsing hands after either cleaning hands or washing fabric or dishes.
  • This step was performed under constant flow of water and above a basin used to collect all water used for the rinse. Once the panellist communicated that there is no perceived need to continue rinse, water flow was stopped, and the weight of water used for the rinse was measured. Test was performed separately with 10 different panellists for each of the tested formulations. It was required that one panellist was testing only one formulation per day and the order of tested formulations for each of the panellist was randomized. The results were evaluated, and average amount of water used in the rinse step is described below.
  • Test formulation Detergent 1 requires on average 129 mL of water for the rinse step, that is substantially less than 283 mL of water required to rinse off hands after immersing them in the solution of Benchmark formulation 3 that contains sodium laureth sulfate.
  • the amount of water used for rinsing of solution of Test formulation Detergent 1 is also substantially lower than the average value of 318 mL needed in the test with a commercially available laundry detergent described as Benchmark formulation 1.
  • Test formulation 1 required on average less water for the rinse step than Di-rhamnolipid-based Benchmark formulation 2 (147 mL on average). Therefore, it becomes evident that mono-rhamnolipid-containing formulation unexpectedly provides better perceived rinsability from skin than formulation based on commonly used commercially available surfactants.
  • This example demonstrates the cleaning effect of mono-rhamnolipids when used in formulations of household cleaners on hard surfaces.
  • Exemplary formulations described in the table below were prepared according to the following protocol. Initially, a measured amount of water was introduced into a glass beaker of a suitable size. Subsequently, further constituents were added at room temperature and under vigorous stirring. The ingredients were added in no specific or uniform sequence as the order of addition to the solution was not critical. Finally, any remaining amount of water was introduced to ensure desired concentration of ingredients. All ingredients were mixed using a magnetic stirrer and pH of the solution was adjusted to 8.7 by addition of sodium carbonate. The mixture was then stirred for 5 minutes to ensure a homogenous solution. The exemplary compositions were easily pourable and stable at room temperature for extended period.
  • HSC Benchmark formulation 1 that contained the di-rhamnolipids described above as the main active ingredient. It was subsequently used as a control formulation.
  • HSC Test formulation 1 that contained the mono-rhamnolipids described above as the main active ingredient.
  • HSC Benchmark formulation 1 Compositions of HSC Benchmark formulation 1 and HSC Test formulation 1 evaluated in cleaning performance tests: HSC Benchmark formulation 1 /% HSC Test formulation 1 /% di-rhamnolipids 1.00 mono-rhamnolipids 1.00 Sodium citrate 0.7 0.7 Sodium carbonate ⁇ 0.2 (to achieve pH 8.7) ⁇ 0.2 (to achieve pH 8.7) Water to 100 to 100
  • Test Protocol German Cosmetic, Toiletry, Perfumery and Detergent Association
  • Test Monitors were placed in a TQC Sheen washability tester (model AB5000) and locked in a position.
  • One Test Monitor was placed in the Washability Tester at the time, but it was ensured that for each of the cleaning formulations, the test was conducted at least once at each of the four tracks of the Washability Tester. Subsequently, dry, 9 cm by 4.5 cm sponges were first moistened with tap water, and water excess was wrung out from sponges. Thereafter, 10 g of the test solution was loaded onto the sponge and sponge was attached to the cleaning arm of the Washability Tester. Washability Tester was then actuated and controlled to provide 100 cleaning cycles (so 200 linear strokes) over the Test Monitor.
  • the speed of the strokes for 20 cycles per minute and the test was performed at room temperature. After 100 cleaning cycles were completed, the Test Monitor was removed from the Sheen tester, rinsed with tap water, and allowed to dry. The test was repeated several times to provide 5 replicates for each tested composition.
  • the treated Test Monitors were visually evaluated by five panelists who were asked to rate the cleaning efficacy achieved by each of the compositions. Panellists ranked the cleaning efficacy on a scale from 0 to 10, with 0 representing no observed cleaning and 10 representing a complete removal of the stain. For comparative purposes, each of the panellists was provided with a new, soiled Test Monitor that represented no cleaning as well as with a fully cleaned Test Monitor that represented the score of 10. Additionally, the panellists were provided with the evaluation template according to IKW Test Protocol to enable more accurate assessment of cleanness. The scores were summed and averaged for each of the tested composition and the results are reported.
  • composition containing object of invention surprisingly delivers superior cleaning performance results to the benchmark.
  • HSC Test formulation 1 achieved an average cleaning score of 10.0 that by far exceeds cleaning result of 4.1 reported for HSC Benchmark formulation 1. Therefore, it becomes evident that mono-rhamnolipid-containing formulation unexpectedly provide better cleaning performance in hard-surface cleaning application than Di-rhamnolipid-based cleaners.
  • Powder detergent 1 Mono-rhamnolipids of example 1 12.0% Linear sodium alkylbenzenesulphonate 5.3% Fatty alcohol ethoxylate C12-18 (7 EO) 2.0% Sodium salts of fatty acids 2.1% Antifoam DC2-4248S 5.0% Zeolite 4A 36.3% Sodium carbonate 14.9% Sodium salt of acrylic-maleic acid copolymer (Sokalan CP5) 3.1% Sodium silicate 3.8% Carboxymethylcellulose 1.5% Dequest 2066 (Phosphonate) 3.6% Optical brighteners 0.3% Protease (Savinase 8.0) 0.5% Sodium perborate monohydrate 1.0% Sodium sulphate Remainder Powder detergent 2 Mono-rhamnolipids of example 1 12.0% Linear sodium alkylbenzenesulphonate 5.3% Fatty alcohol ethoxylate C12-18 (7 EO) 2.0% Sodium salts of fatty acids 2.1% Antifoam DC2-4248S 5.0% Zeolite 4A 36.3% Sodium carbonate 14.9%

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  • Engineering & Computer Science (AREA)
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  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
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  • Detergent Compositions (AREA)
EP22192529.0A 2022-08-29 2022-08-29 Mono-rhamnolipidreiche zusammensetzung Withdrawn EP4155371A1 (de)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282942A2 (de) 1987-03-17 1988-09-21 University Of Iowa Research Foundation Verfahren zur Herstellung von Rhamnose
DE4127908A1 (de) 1991-08-23 1993-02-25 Hoechst Ag Verfahren zur induktion der rhamnolipid-produktion in pseudomonas aeruginosa staemmen mit hilfe von glycerinsaeureether-lipiden und ihre verwendung
EP2410039A1 (de) * 2010-07-22 2012-01-25 Unilever PLC Rhamnolipide mit verbesserter Reinigung
WO2012010406A1 (en) * 2010-07-22 2012-01-26 Unilever Plc Combinations of rhamnolipids and enzymes for improved cleaning
WO2012013554A1 (de) 2010-07-28 2012-02-02 Evonik Goldschmidt Gmbh Zellen und verfahren zur herstellung von rhamnolipiden
US20140296168A1 (en) 2013-04-02 2014-10-02 Evonik Industries Ag Mixture composition comprising rhamnolipids
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