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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/22—Carbohydrates or derivatives thereof
  • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• • 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
  • C11D1/83—Mixtures of non-ionic with anionic compounds
• • 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
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
• • 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

Definitions

• the present invention relates to the field of compositions for cleaning hard surfaces at high pressure, and especially for cleaning the outer surfaces of vehicles.
• the problems generated by such cleaning have their origins in both the heterogeneous set of objects that constitute hard surfaces and the diversity of materials that form them, including, for example, metals, glass, ceramics, porcelain, plastics, gum, rubber or wood.
• the surface is predominantly metallic, optionally galvanized, typically with an outer coating made of paints and/or varnishes, which can also include chromed elements.
• the surface is predominantly metallic, optionally galvanized, typically with an outer coating made of paints and/or varnishes, which can also include chromed elements.
• paints and/or varnishes which can also include chromed elements.
• it is also common the presence of other materials such as plastics, rubber, and glass.
• Maintaining clean the outer surface of the vehicle is desirable not only for esthetic reasons but also in order to prevent its premature deterioration, avoiding its wear, discoloration and corrosion as much as possible.
• One of the elements that contribute to the deterioration of the outer surface of the vehicles is constituted by a particular type of dirt which adheres to said surface, forming a film, which is usually designated by the term traffic film.
• the composition of this film of dirt includes a great variety of substances, both organic and inorganic, having very different physical and chemical characteristics (in particular their high degree of adhesion to the surface, probably due to electrostatic attractions), making it particularly difficult to eliminate.
• non rubbing cleaning systems have been developed, based on pressure spraying of cleaning compositions onto the vehicle surface.
• simple detergent compositions complete dirt removal is not achieved, and that for achieving a degree of cleanliness, which is not always acceptable, high concentrations of detergent are required, which is a serious drawback from both an economic and environmental point of view.
• detergent compositions in combination with certain particles conferring abrasive properties to such compositions.
• the European patent application EP-A-1184452 discloses a detergent composition for use in the cleaning of hard surfaces by spraying, comprising spherical particles, which produce an abrasive effect due to the kinetic energy of said particles when directed at high pressure onto the surface.
• Such particles are composed of silicic acid, silicic acid derivatives, silicates or alumina.
• a process for cleaning surfaces is described, by high pressure treatment with a detergent solution which further comprises particles of a thermoplastic material such as polyethylene, polypropylene, polystyrene or acrylonitrile butadiene styrene (ABS). These particles, preferably, have a spherical or rounded shape so as not to damage the surface being cleaned.
• a detergent solution which further comprises particles of a thermoplastic material such as polyethylene, polypropylene, polystyrene or acrylonitrile butadiene styrene (ABS).
• a method for cleaning surfaces consisting in spraying a pressurized liquid comprising surfactants together with water soluble abrasive particles, preferably sodium or potassium carbonate, bicarbonate or sulfate.
• a cleaning composition to be used for spraying comprising abrasive particles which can be water soluble, for example, sodium bicarbonate, sodium tripolyphosphate pentahydrate, sodium tetraborate decahydrate, potassium sulfate or sodium citrate; or they can be water-insoluble abrasive particles such as silicon dioxide, silicates, calcium carbonate, dicalcium phosphate, iron oxide, calcium pyrophosphate, sodium metaphosphate, diatomite or aluminum oxide.
• abrasive particles which can be water soluble, for example, sodium bicarbonate, sodium tripolyphosphate pentahydrate, sodium tetraborate decahydrate, potassium sulfate or sodium citrate; or they can be water-insoluble abrasive particles such as silicon dioxide, silicates, calcium carbonate, dicalcium phosphate, iron oxide, calcium pyrophosphate, sodium metaphosphate, diatomite or aluminum oxide.
• the object of the present invention is a composition for cleaning hard surfaces.
• the object of the present invention is a composition for cleaning hard surfaces at high pressure, comprising discrete particles of cellulose whose average particle size is less than or equal to 200 ⁇ m.
• compositions for cleaning hard surfaces at high pressure comprising discrete particles of cellulose which, surprisingly, is highly effective for removing the dirt adhered to these surfaces. It has been found that such composition is particularly effective for significantly removing the film of dirt of the traffic film type adhered to the outer surfaces of the vehicles without causing the deterioration of the cleaned surface.
• the discrete particles of cellulose refer to insoluble particles of cellulose.
• the discrete particles of cellulose suitable for being used in the compositions of the present invention are selected from the group consisting of microcrystalline cellulose, powdered cellulose, nanocellulose, cellulose microfibers, and mixtures thereof. Preferably they are selected from microcrystalline cellulose, cellulose microfibers, and mixtures of both.
• Said discrete particles of cellulose can have a granular appearance, with variable and irregular shapes, as is the case of microcrystalline cellulose, powdered cellulose and nanocellulose; or they can be filaments, of substantially cylindrical shape, as is the case of cellulose microfibers.
• the average particle size of microcrystalline cellulose, powdered cellulose and nanocellulose is usually characterized by its equivalent average diameter, which is determined according to the conventional analytical methods for measuring the average particle size as described, for example, in the book M. E. Aulton, Farmacia. La ciencia del dise ⁇ o de las formas farmacéuticas, second edition, Elsevier, Madrid, 2004 , by the electrical sensing zone method (Coulter counter), or by laser light scattering.
• the substantially cylindrical cellulose microfibers are usually characterized by the length (L) and thickness (T) of the same.
• the cellulose microfibers are also characterized by their equivalent diameter, whose value corresponds to the diameter of a hypothetical sphere that has the same volume as the cylindrical filament defined by the above mentioned L and T dimensions.
• the average particle size of the discrete particles of cellulose refers to the equivalent average diameter determined according to the methods described above, depending on the type of particles of cellulose concerned.
• the discrete particles of cellulose that are part of the object of the present invention have an average particle size of less than or equal to 200 ⁇ m, typically comprised between 0.05 ⁇ m and 200 ⁇ m, preferably between 1 ⁇ m and 150 ⁇ m, and more preferably comprised between 10 ⁇ m and 100 ⁇ m.
• Nanocellulose can be obtained from the aforementioned ones, for example by an ultrasound treatment that reduces the average particle size to dimensions of about 1 ⁇ m or less.
• Microcrystalline cellulose is a crystalline powdered substance, obtained by controlled hydrolysis of ⁇ -cellulose, which shows the characteristics specified for example in the handbook of pharmaceutical excipients, R. C. Rowe, P. J. Sheskey and P. J. Weller, Handbook of Pharmaceutical Excipients, Fourth Edition, Pharmaceutical Press, 2003 .
• Microcrystalline cellulose is commercially available from several suppliers, for example from the company FMC Biopolymer under the general trade name AVICEL®, and it is available in different average particle sizes which are usually comprised between 1 ⁇ m and 200 ⁇ m.
• microcrystalline cellulose qualities can be obtained from the company Acros Organics, with an average particle size of 50 ⁇ m or 90 ⁇ m. It can also be obtained from the company Sigma-Aldrich under the name Cellulose microcrystalline 310697 with an average particle size of 20 ⁇ m.
• microcrystalline cellulose with an average particle size comprised between 20 ⁇ m and 100 ⁇ m is used.
• the powdered cellulose is a powder obtained by reducing the size of ⁇ -cellulose by mechanical means, which shows the characteristics specified in the book R. C. Rowe, already cited.
• the cellulose in powdered form is commercially available, for example from the company J. Rettenmaier & Söhne, under the general trade name ARBOCEL®. Said cellulose is available in different average particle sizes which usually are comprised between 1 ⁇ m and 200 ⁇ m.
• the cellulose microfibers can be obtained by means of several mechanical and/or chemical treatments of cellulose until cellulose in the form of filaments is obtained.
• Cellulose microfibers are commercially available from several suppliers, for example from the company J. Rettenmaier & Söhne, under the general trade name ARBOCEL®. Said microfibers are available in different sizes, and are usually characterized by the length (L) and thickness (T) of the same.
• the cellulose microfibers suitable for being used in the present invention can have a length comprised approximately between 1 ⁇ m and 220 ⁇ m, and a thickness comprised approximately between 0.01 ⁇ m and 150 ⁇ m, which corresponds to an equivalent average diameter comprised between 0.05 ⁇ m and 195 ⁇ m, according to the approach discussed above.
• Preferably cellulose microfibers that have an equivalent average diameter comprised between 10 ⁇ m and 30 ⁇ m are used.
• the cellulose nanoparticles can be obtained from any of the particles of cellulose described above, i.e. from microcrystalline cellulose, powdered cellulose or cellulose microfibers, subjecting them to a process to reduce their size. This reduction can be achieved, for example, by ultrasound treatment of a liquid dispersion of said particles, until obtaining nanoparticles of cellulose whose average size is equal to or less than 1 ⁇ m, preferably comprised between 0.05 ⁇ m and 1 ⁇ m.
• the ultrasound treatment is performed at a power of 450 W, for a time period comprised between 5 minutes and 3 hours, using a dispersion of the particles of cellulose preferably in distilled water with a concentration comprised between 0.01% and 20%, by weight.
• composition for cleaning hard surfaces at high pressure of the present invention comprises discrete particles of cellulose as defined above.
• the composition object of the present invention comprises between 1% and 20% of discrete particles of cellulose, percentage expressed as weight of cellulose relative to the total weight of solids of the composition.
• solids refers to all the ingredients of the composition, except water and, occasionally, other co-solvents.
• the cleaning effect of the discrete particles of cellulose is so significant that in a preferred embodiment of the invention, the cleaning composition only comprises discrete particles of cellulose as insoluble product, i.e., the composition does not comprise additional abrasive products.
• the composition comprises discrete particles of cellulose dispersed in water and preservation agents.
• the composition comprises between 1% and 20% by weight relative to the total weight of the composition.
• said composition further comprises surfactants, coadjuvants, and optionally other auxiliary products.
• composition comprising surfactants, adjuvants and optionally other auxiliary components can be in solid or liquid form, without having any influence on the result of the cleaning, since, as explained below, the composition, whether solid or liquid, is dispersed in water before being applied at high pressure onto the hard surface.
• Surfactants as is well known by the skilled in the art, are amphiphilic substances which have a hydrophobic portion and a hydrophilic portion. This particular chemical structure of surfactants plays an important role in the washing process because they lower the surface tension of the liquid providing improved wetting of the surfaces and they are also able to form aggregates such as micelles, which allow dissolving, emulsifying or disaggregating the dirt.
• the surfactants suitable for being used in the compositions of this invention are selected from the group consisting of anionic, nonionic, cationic and amphoteric surfarctants, and mixtures thereof.
• surfactants are commercially available from several suppliers such as, for example, the companies Kao Corportation, BASF, Croda, Huntsman, Evonik, or Cognis (now BASF), among others.
• anionic surfactants suitable for being used within the context of the present invention are, for example, soaps, alkylbenzenesulfonic acids and their salts, sulfonated ⁇ -olefins, sulfonated paraffins, alkyl sulfates, alkyl ether sulfates, glycerin ether sulfates, alkyl sulfosuccinates, carboxylic acids ethers and their salts, alkyl phosphates, alkyl ether phosphates, alkylphenol sulfates, alkylphenol ether sulfates, isethionates, sarcosinates, taurates, and N-acylamino acid salts.
• alkyl ether sulfates there is the sodium lauryl ether sulfate, as the one supplied by the company Kao Corporation under the trade name or EMAL® or the product range TEXAPON® from the company Cognis (now BASF); alkyl sulfates are commercially available under the name SULFOPON® from the company Cognis (now BASF); among the carboxylic acids ethers are those supplied by the company Kao Corporation under the trade name AKYPO®; or among the alkylbenzenesulfonic acids should be mentioned, for example, the linear alkylbenzene sulfonic acid (LAS), especially the n-dodecylbenzenesulfonic acid and its salts, such as for example the one supplied by the company Cognis (now BASF) under the trade name MARANIL®.
• LAS linear alkylbenzene sulfonic acid
• MARANIL® MARANIL®
• nonionic surfactants suitable for being used within the context of the present invention are, for example, ethoxylated fatty alcohols, ethoxylated fatty acids, ethoxylated alkylphenols, fatty acid alkanolamides, ethoxylated fatty acid alkanolamides, ethoxylated fatty amines, fatty amine oxides, fatty amidoamine oxides, esters of glycerin and fatty acids, sorbitan esters, ethoxylated sorbitan esters, sucrose esters, alkylpolyglycosides, copolymers of ethylene/propylene oxide, among others.
• ethoxylated fatty alcohols can be mentioned those provided by the company Cognis (now BASF) under the trade name DEHYDOL®, such as DEHYDOL® LT7 which is a C 12 -C 18 fatty alcohol with about 7 moles of ethylene oxide.
• DEHYDOL® such as DEHYDOL® LT7 which is a C 12 -C 18 fatty alcohol with about 7 moles of ethylene oxide.
• ethoxylated sorbitan esters can be mentioned those provided by the company Kao Corporation under the trade name RHEODOL®.
• ethoxylated alkylphenols can be mentioned the products marketed under the name DEHYDROPHEN® by the company Cognis (now BASF).
• amphoteric surfactants suitable for being used within the context of the present invention are, for example, alkyldimethyl betaines, alkylamidobetaines, alkylsulfobetaines, alkylamidosulfobetaines, imidazoline derivatives and alkylaminopropionates, among others.
• alkylamidobetaines can be mentioned those supplied by the company Cognis (now BASF) under the trade name DEHYTON®.
• cationic surfactants suitable for being used within the context of the present invention are quaternary ammonium compounds having an antistatic effect, such as benzalkonium chloride, which is commercially available under the trade name DEHYQUART® supplied by the company Cognis (now BASF).
• coadjuvant agents can be used, for example, polyphosphates, especially tripolyphosphates and alkali pyrophosphates, alkali carbonates, alkali silicates, zeolites, alkali salts of nitriloacetic acid, EDTA and its salts, the present eco-friendly substitutes for NTA/EDTA/phosphates, such as GLDA (Glutamic Acid N,N-Diacetic Acid) commercially available under the name Disolvine® GL from Akzo Nobel, alkali salts of citric acid, and mixtures thereof.
• the alkali salt preferably used is sodium salt.
• the cleaning composition object of the present invention can optionally contain other auxiliary products such as, for example, enzymes, colorants, foam stabilizers, thickeners, co-solvents, and pH regulators.
• auxiliary products such as, for example, enzymes, colorants, foam stabilizers, thickeners, co-solvents, and pH regulators.
• it When it is a liquid composition, it generally further comprises preservative agents.
• the cleaning composition comprises between 1% and 20% of discrete particles of cellulose, preferably between 5% and 10%; between 5% and 50% of surfactants, preferably between 10% and 30%; and between 35% and 95% of coadjuvants, preferably between 50% and 65%. These percentages are expressed by weight relative to the total weight of solids of the composition. The percentages of the different components are selected so that the sum thereof is the 100% of the composition.
• the cleaning composition comprises between 1% and 20% of discrete particles of cellulose, preferably between 5% and 10%; between 2% and 20% of anionic surfactants, preferably between 2% and 10%; between 3% and 30% of nonionic surfactants, preferably between 5% and 15%; and between 35% and 95% of coadjuvants, preferably between 50% and 65%. These percentages are expressed by weight relative to the total weight of solids of the composition. The percentages of the different components are selected so that the sum thereof is the 100% of the composition.
• the anionic surfactant is an alkali salt of a linear alkylbenzenesulfonic acid, and more preferably is the sodium salt of the n-dodecylbenzenesulfonic acid;
• the nonionic surfactant is an ethoxylated fatty alcohol, more preferably is an alcohol with C 12 -C 18 chain ethoxylated with about 7 moles of ethylene oxide, and
• the coadjuvant is selected from the group consisting of sodium tripolyphosphate, sodium carbonate, and mixtures of both, more preferably the coadjuvant is a mixture of sodium tripolyphosphate and sodium carbonate.
• a characteristic solid cleaning composition according to the present invention comprises, for example, between 1% and 20% of discrete particles of cellulose, between 5% and 45% of sodium tripolyphosphate, between 20% and 50% of sodium carbonate, between 2% and 10% of anionic surfactant and between 5% and 15% of nonionic surfactant. These percentages are expressed by weight relative to the total weight of solids of the composition. The percentages of the different components are selected so that the sum thereof is the 100% of the composition.
• composition can also contain other ingredients such as amphoteric surfactants, cationic surfactants, enzymes, colorants, foam stabilizers, among others.
• other ingredients such as amphoteric surfactants, cationic surfactants, enzymes, colorants, foam stabilizers, among others.
• a solid detergent composition can be prepared by direct mixing of all the ingredients when they are solid, being also directly mixed with the discrete particles of cellulose. It can also be prepared by a process comprising a step of spray drying, for which a paste known as slurry is previously prepared by dispersing some of the components in water, usually anionic surfactants and coadjuvants. Said slurry is subjected to spray drying, for example, by a counterflow of hot air.
• powdered detergent composition particles are obtained with an apparent density approximately comprised between 300 g/l and 1000 g/l.
• the atomized detergent composition can be completed by the further addition of other components, for example, nonionic surfactants.
• the discrete particles of cellulose can also be added in this final step to the detergent already atomized.
• a characteristic liquid cleaning composition according to the present invention comprises, for example, between 0.5% and 5% of discrete particles of cellulose, between 10% and 20% of sodium tripolyphosphate, between 1% and 15% of nonionic surfactant and between 1% and 10% of anionic surfactant, adding water, optionally in combination with other co-solvents, until reaching the 100% of the composition.
• the percentages are expressed by weight of each ingredient relative to the total weight of the composition including water and possibly the co-solvents.
• liquid detergent formulations of the invention are, for example, propylene glycol, 1-methoxy-2-propanol, glycerin, cumenesulfonate, dipropylene glycol, dipropylene glycol monomethyl ether, butyl glycol, or butyldiglycol.
• the liquid detergent formulation can contain other ingredients such as amphoteric surfactants, cationic surfactants, enzymes, colorants, foam stabilizers, thickening agents, pH regulators, and preservative agents, among others.
• the preparation of the liquid detergent is performed by methods that are also well known in the field of detergent technology. For example, it can be prepared by dissolving the different components in water under stirring until achieving a homogeneous solution.
• the discrete particles of cellulose can be added, for example, in a final step, to the prepared detergent composition, by mechanical stirring or by other methods of dispersion such as, for example, sonication, until obtaining a homogeneous dispersion of such particles in the liquid medium.
• hard surface is understood broadly and comprises, for example, any metal surface, for example, of aluminum, chromium, steel, or stainless steel; glass, ceramic or porcelain surfaces; rubber or gum surfaces; surfaces of any type of plastic, such as thermoplastic or thermosetting polymers, among other possible materials. Moreover, such surfaces coated with a layer of paint, varnish, enamel, or other finishing are also included.
• the hard surfaces to be cleaned by the method of the present invention may correspond to a wide variety of objects, both domestic and industrial. Among them can be mentioned, for example, floors, walls, tiles, sinks, work surfaces, blinds, windows, bathrooms, any type of outdoor furniture, panels, containers, tarps, machinery, or the outer surface of any type of vehicle.
• the cleaning composition and the cleaning method of the present invention are applied for the cleaning of the outer surface of a vehicle. It has been observed that the composition of the invention is particularly effective for eliminating the so-called traffic film.
• the traffic film can contain, for example, fuel combustion residues, fuel leaks, carbon black, lubricating substances, residues of previous washings and very heterogeneous environmental substances present in the roads, such as salts, sand, or mud.
• vehicle includes any means of transport, typically, cars, trucks, buses, trailers, wagons, motorcycles, airplanes, aircraft, or parts thereof, among others.
• It is also part of the object of this invention a method for cleaning hard surfaces comprising the step of spraying at high pressure onto the hard surface an aqueous dispersion of the composition of the invention comprising discrete particles of cellulose whose average particle size is less than or equal to 200 ⁇ m.
• high pressure refers to a pressure equal to or higher than 10 bar.
• the cleaning method is performed at a pressure comprised between 20 and 200 bar, more preferably comprised between 50 and 150 bar, and more preferably between 90 and 110 bar.
• the high pressure spraying can be performed using a pressure washer machine such as the ones existing on the market, for example, those supplied by the company Nilfisk-ALTO, Kärcher or piston pumps of the "CAT” or "Interpump” type.
• the aqueous dispersion to be sprayed is prepared by dispersing the composition of the invention in water. That is, the method of the invention comprises a prior step of preparing an aqueous dispersion of the composition that comprises the discrete particles of cellulose.
• Such machines have a tank in which a stock aqueous dispersion of the composition comprising the discrete particles of cellulose is prepared.
• this aqueous dispersion is prepared by dispersing in water the composition of the invention, either in solid or liquid form, until an approximate dilution of 1 to 10 g/l of it, remaining the particles of cellulose in suspension.
• this stock aqueous dispersion is dosed within a jet of pressurized water, by means of a device that said pressure washer machines have for this purpose, and this allows the final concentration to be conveniently adjusted in the sprayed water, or nozzle concentration, which is the one effectively propelled against the surface to be cleaned.
• the nozzle concentration of the discrete particles of cellulose is preferably comprised between 0.005% and 0.2%, more preferably between 0.005% and 0.1%, and still more preferably between 0.005% and 0.05%, wherein the percentage is expressed by cellulose weight relative to the weight of the sprayed aqueous dispersion.
• the cleaning devices used usually have a system for heating the water for its subsequent application at pressure onto the surface to be cleaned.
• the cleaning method according to the present invention can be performed at a temperature comprised between room temperature and approximately 90° C, preferably between 40° C and 70° C, and still more preferably between 50° C and 60 °C.
• compositions of the invention including discrete particles of cellulose, a substantially superior efficacy is achieved in the cleaning of hard surfaces compared with detergent compositions that do not comprise said particles.
• the nozzle concentration can be significantly reduced, cleaning times are optimized and the wastewater is reduced.
• the obtained dispersion was treated with ultrasounds at a power of 450 W for 1 hour.
• a liquid detergent composition was prepared by the dissolution in water of 20% by weight of sodium tripolyphosphate, 10% by weight of DEHYDOL® LT-7 of the company Cognis (now BASF) (C 12 -C 18 alcohol ethoxylated with 7 moles of ethylene oxide), 5% by weight of dodecylbenzenesulfonic acid neutralized with 0.6% by weight of sodium hydroxide.
• a solid detergent composition was prepared containing 40% by weight of sodium tripolyphosphate, 45% by weight of sodium carbonate, 10% by weight of DEHYDOL® LT-7 of the company Cognis (now BASF) (C 12 -C 18 alcohol ethoxylated with 7 moles of ethylene oxide), and 5% by weight of dodecylbenzenesulfonic acid. The mixture was kept under stirring until a homogeneous powder was obtained.
• Example 1 Liquid detergent composition with microcrystalline cellulose
• a liquid detergent composition was prepared by the dissolution in water of 20% by weight of sodium tripolyphosphate, 10% by weight of DEHYDOL® LT-7 of the company Cognis (now BASF) (C 12 -C 18 alcohol ethoxylated with 7 moles of ethylene oxide), 5% by weight of dodecylbenzenesulfonic acid neutralized with 0.6% by weight of sodium hydroxide and 1.77% by weight of microcrystalline cellulose of the company Sigma-Aldrich with an average particle size of 20 ⁇ m (Cellulose microcrystalline 310697).
• the cellulose content of this composition was 4.8% by weight relative to the weight of the active components, that is, all of them except water.
• Example 2 Solid detergent composition with cellulose microfibers
• a solid detergent composition was prepared containing 40% by weight of sodium tripolyphosphate, 45% by weight of sodium carbonate, 10% by weight of DEHYDOL® LT-7 of the company Cognis (now BASF) (C 12 -C 18 alcohol ethoxylated with 7 moles of ethylene oxide), 5% by weight of dodecylbenzenesulfonic acid, and 11.11% of cellulose microfibers having a length of 23 ⁇ m and a thickness of 17 ⁇ m (ARBOCEL® BE 600-20), which represents an equivalent average diameter of 22 ⁇ m.
• the mixture was kept under stirring until a homogeneous powder was obtained.
• the weight ratio of cellulose relative to the total of the composition was 10%.
• Example 3 Solid detergent composition with microcrystalline cellulose
• a solid detergent composition was prepared containing 40% by weight of sodium tripolyphosphate, 45% by weight of sodium carbonate, 10% by weight of DEHYDOL® LT-7 of the company Cognis (now BASF) (C 12 -C 18 alcohol ethoxylated with 7 moles of ethylene oxide), 5% by weight of dodecylbenzenesulfonic acid, and 11.11% of microcrystalline cellulose with an average size of 90 ⁇ m of the company Acros Organics. The mixture was kept under stirring until a homogeneous powder was obtained. The weight ratio of cellulose relative to the total of the composition was 10%.
• Example 4 Solid detergent composition with microcrystalline cellulose
• a solid detergent composition was prepared containing 40% by weight of sodium tripolyphosphate, 45% by weight of sodium carbonate, 10% by weight of DEHYDOL® LT-7 of the company Cognis (now BASF) (C 12 -C 18 alcohol ethoxylated with 7 moles of ethylene oxide), 5% by weight of dodecylbenzenesulfonic acid, and 11.11% of microcrystalline cellulose with an average size of 50 ⁇ m HEWETEN® 101 of the company J. Rettenmeier & Söhne. The mixture was kept under stirring until a homogeneous powder was obtained. The weight ratio of cellulose relative to the total of the composition was 10%.
• Example 5 Aqueous composition with microcrystalline cellulose
• microcrystalline cellulose of the company Sigma-Aldrich with an average particle size of 20 ⁇ m (Cellulose microcrystalline 310697) were dispersed in 190 g of water. The dispersion was kept under stirring until a homogeneous dispersion was obtained, then, it was treated with ultrasounds at a power of 450 W for 90 minutes.
• a painted surface of a vehicle previously soiled with traffic-film type dirt was cleaned according to the method of the invention, using the compositions prepared in Examples 1 to 4. To this end, a pressure washer machine of the brand Nilfisk-ALTO was used.
• compositions of the invention were performed at two temperatures: at room temperature and at 53° C, and two pressures: 75 bar and 105 bar.
• compositions of the reference examples described above were also tested.
• Example 1 To test the liquid composition of Example 1, it was conveniently dosed in the feed water of the pressure system to obtain a nozzle concentration of 0.40%, and the surface was cleaned at a pressure of 75 bar and at room temperature. The high pressure spraying was maintained for a period of about 1 minute over an area of 0.25 m 2 .
• the efficacy of the solid compositions of Examples 2 to 4 was tested by dispersing 10 g of each of them in 5 l of water to obtain working solutions at the desired composition of 0.2% by weight.
• the cleaning method was performed at a pressure of 105 bar, at a temperature of 53° C and for a period of time of 1 minute over an area of 0.25 m 2 .
• Example 5 The composition of Example 5 was conveniently dosed into the feed water of the pressure system to obtain a nozzle concentration of 0.40% by weight, and the surface was cleaned at a pressure of 75 bar and at room temperature. The high pressure spraying was maintained for a period of about 1 minute over an area of 0.25 m 2 . The high pressure spraying was maintained for a period of 1 minute over an area of 0.25 m 2 .
• washing tests were also performed with the solid detergent prepared in Reference Example 2, which also lacked cellulose particles. To this end, 10 g were dispersed in 5 l of water and the desired composition of 0.2% by weight was obtained. In this case, the cleaning process was performed at a pressure of 105 bar, at a temperature of 53° C and for a period of time of 1 minute over an area of 0.25 m 2 .
• Example 1 The efficacy of the liquid composition of Example 1 was evaluated using a 2 2 factorial design with the factors and levels shown in the matrix of Table 2: TABLE 2 Test Particles of cellulose Detergent composition Control (water) No No Example 5 Yes No Reference Example 1 No Yes Example 1 Yes Yes
• Example 5 included microcrystalline cellulose with an average particle size of 20 ⁇ m, but it did not contain surfactants or adjuvants;
• Reference Example 1 was a liquid detergent composition not containing particles of cellulose, and
• Example 1 was a detergent composition of the invention containing microcrystalline cellulose with an average particle size of 20 ⁇ m.
• Example 5 It can be observed that by incorporating microcrystalline cellulose to water, Example 5, there is an improvement in the degree of cleanliness, going from level 5 to level 2-3.

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• 2011
  • 2011-12-14 ES ES201132012A patent/ES2413565B1/es not_active Expired - Fee Related
• 2012
  • 2012-12-11 WO PCT/IB2012/057189 patent/WO2013088345A1/es active Application Filing
  • 2012-12-11 EP EP12856765.8A patent/EP2792736A4/de not_active Withdrawn

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