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    • 专利摘要:
    The present invention relates to a cleaning formulation comprising a lithium magnesium silicate. The formulation is particularly intended for use in a “water-free” context, which means that no additional water (apart from the water possibly already contained in the formulation) is needed to carry out the cleaning. The invention also relates to a method of cleaning a surface, and to a cleaning kit comprising said formulation and a microfiber cloth. The formulation is advantageously applied using a microfiber cloth, such a cloth is soft and will not scratch the surface to be cleaned, particularly the paint of a car.
    公开号:CH715789A2
    申请号:CH00266/19
    申请日:2019-03-05
    公开日:2020-07-31
    发明作者:Sun Libin；Yang Su；Zhu Xinhan
    申请人:Linkage Tech Switzerland Sa；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    The present invention relates to a cleaning formulation. The formulation is particularly intended for use in a “water-free” context, which means that no additional water (apart from the water possibly already contained in the formulation) is needed to carry out the cleaning. The field of application relates to essentially non-absorbent surfaces such as metal, plastic, leather, stone, minerals, painted and coated surfaces, certain woods and glass, for example. A particularly preferred application is the cleaning of vehicles (interiors and, in particular, exteriors).
    BACKGROUND OF THE INVENTION
    [0002] Most cleaning formulations currently available on the market require the use of a large amount of additional water, for example to constitute a larger amount of cleaning solution, to dilute a concentrated cleaning solution or to rinse the residue after application and use of a cleaning solution.
    [0003] Drinking water is a precious resource and the World Economic Forum considers the lack of clean water to meet demand to be the main global risk in terms of potential impact over the next decade.
    [0004] To minimize this risk, it is necessary to reduce the use and contamination of water in all types of processes. Cleaning is an area where large amounts of water are used and therefore contaminated with various cleaning agents. This water must be cleaned before it can be reused. Vehicle cleaning (such as car cleaning) is a good example of an area where large amounts of water are used and contaminated with various chemical agents.
    [0005] Formulations for the waterless cleaning of vehicles have already been proposed, but have generally failed to exhibit acceptable cleaning properties. In particular, dirt removal, final surface gloss and storage stability are generally not acceptable.
    [0006] WO 2018/045925 AI describes a formulation which cleans without the need for additional water to dilute or rinse the cleaning formulation (i.e., a waterless cleaning formulation). This formulation can remove dirt from a surface. It is not necessary to use additional water to rinse the dirt. This saves water.
    [0007] The Applicant has observed that the cleaning formulations obtained according to this publication could still be improved, in particular with regard to their temperature stability.
    SUMMARY OF THE INVENTION
    [0008] According to a first aspect of the invention, there is proposed a formulation for cleaning comprising:<tb> <SEP> a solvent; and<tb> <SEP> silicate selected from magnesium and lithium silicates and mixtures thereof;<tb> <SEP> wherein the silicate is present in an amount in the range of 0.01 to 1.5% by weight.
    [0009] In a second aspect of the invention, there is provided a formulation for cleaning comprising:<tb> <SEP> a solvent;<tb> <SEP> of the silicate selected from the group consisting of<tb> <SEP> silicate of formula H2LiMgNaO12Si4;<tb> <SEP> silicate of the formula MwExSiyOz · aH2O, in which M is an alkali metal and E is an alkaline earth metal;<tb> <SEP> where w, x, y and z are all numbers (normally integers) greater than 0 and in which a is 0 or an integer (normally integers) greater than 0;<tb> <SEP> and mixtures thereof;<tb> <SEP> wherein the silicate is present in a total amount in the range of 0.01 to 1.5% by weight.
    [0010] In a third aspect of the invention, there is provided a formulation for cleaning comprising:<tb> <SEP> a solvent, preferably water;<tb> <SEP> of the silicate present in an amount in the range of 0.01 to 1.5% by weight; at least one polymer; wherein the formulation has a viscosity of at least 20 mPa.s, preferably at least 28 mPa.s, measured at a shear rate of 11.3 cm / s and a temperature of 20 ° C.
    [0011] In a fourth aspect of the invention, there is provided a method for cleaning a surface, comprising the following steps<tb> (a) <SEP> provide the current cleaning formulation;<tb> (b) <SEP> Apply the undiluted cleaning formulation to the surface.
    In a fifth aspect of the invention, there is provided a process for preparing the present formulation comprising the following steps:<tb> (a) <SEP> provide the silicate;<tb> (b) <SEP> dispersing the silicate in a solvent; preferably water, for example demineralized or distilled water.
    According to a sixth aspect of the invention, there is provided a use of the present cleaning formulation for cleaning a surface, the surface preferably comprising metallic, ceramic, enameled, varnished or sealed surfaces, painted surfaces, plastic, leather, glass or wood, or belonging to a vehicle.
    [0014] In a seventh aspect of the invention, there is provided a kit for cleaning a surface, in particular the external or internal surface of a vehicle, comprising a container which contains the present cleaning formulation and at minus a microfiber cloth.
    DESCRIPTION OF FIGURES
    [0015] Figure 1 shows a temperature-viscosity relationship for a prior art formulation containing sodium polyacrylate as the main thickening agent. The increase in temperature causes a significant and permanent reduction in viscosity.
    [0016] Figure 2 shows the change in viscosity of the cleaning formulation of the present invention at different temperatures. It is clear that the viscosity profile is more stable at elevated temperatures compared to the formulations of the prior art. If desired, the viscosity can be appropriately increased during the manufacturing process to compensate for the loss of viscosity caused by the higher temperatures during shipping. However, since the loss of viscosity is not particularly large, any increase in viscosity in the manufacturing process should not be particularly large either.
    FIG. 3 shows the variation in viscosity as a function of the temperature measured for lithium magnesium silicate hydrated in water, measured at a concentration of 1 g / L. This produces an acceptable viscosity for cleaning in all working temperature ranges.
    FIG. 4 shows the variation in viscosity as a function of the temperature measured for the sodium polyacrylate (used in the formulations of the prior art) measured at a concentration of 1 g / L. Although the viscosity is initially acceptable, at higher temperatures it deteriorates to unacceptable levels.
    DETAILED DESCRIPTION OF THE INVENTION
    [0019] The present invention provides a waterless cleaning solution which exhibits improved temperature stability. Such a cleaning solution can be shipped worldwide or stored by consumers in most environments, but also used in different environmental conditions, without fear of significant degradation or loss of efficiency.
    [0020] The invention also aims to provide an improved viscosity profile, which makes the waterless cleaning formulation particularly effective. In particular, the viscosity is desirably within a range practical for consumer application, and the formulation has good spreadability as well as good cleaning and suspending properties. The viscosity of the formulation is very important and has a great influence on the addition of other ingredients, such as the quality requirements of water and other ingredients, without excessive addition of surfactant.
    [0021] The invention also aims to provide excellent cleaning properties, in particular an improved gloss on the cleaned surface.
    [0022] In addition, the solution does not require any additional water to fulfill its cleaning function beyond that which may already be contained in the solution.
    The Applicant has discovered that the types of silicates used in the present invention are particularly effective in giving the cleaning formulation the appropriate viscosity profile while providing excellent temperature stability. In particular, any decrease in the viscosity of the cleaning formulation upon exposure to elevated temperature is negligible compared to prior art cleaning formulations. It is important to note that the decreases in viscosity observed in the formulations of the prior art after exposure to elevated temperature were irreversible. Therefore, this problem cannot be solved by simply reducing the temperature of the cleaning formulation.
    According to the third aspect of the invention, there is provided a formulation for cleaning comprising solvent (preferably water), silicate present in an amount in the range of 0.01 to 1.5% by weight and at least one polymer, the formulation having a viscosity of at least 20 mPa.s, preferably at least 28 mPa.s. The Applicant has identified this viscosity range as being particularly well suited to cleaning the hard surfaces described above. Through the use of silicates the loss of viscosity due to storage at elevated temperatures (such as when shipping formulations worldwide) is minimized. Preferably, the silicate is as in the first or second aspect of the invention.
    In general, it is advantageous that the cleaning formulation has a viscosity of at least 20 mPa.s and preferably of at least 28 mPa.s. Applicants have found that formulations having this minimum level of viscosity are particularly effective in removing dirt from a contaminated surface. Although viscosities lower than these values are not claimed as part of the second aspect of the invention, this is not to say that formulations having such viscosities would not be useful in certain situations. For reference, the viscosity of water is approximately 0.9 mPa.s at 25 ° C.
    The viscosity is determined at 20 ° C and 30 rev / min on a viscometer. 30 revolutions / minute can correspond to 11.3 cm / s.
    In general, it is important that the viscosity of the cleaning formulation is greater than that of water. This allows the cleaning formulation to remove sufficient dirt from the dirty surface.
    [0028] At the other end of the scale, it is advantageous that the cleaning formulation does not have too high a viscosity, otherwise it may be difficult for the user to work with the cleaning formulation. Applicants have found that preferably the cleaning formulation will have a viscosity of up to 100 mPa.s, more preferably up to 75 mPa.s and most preferably up to 45 mPa.s. In this way, a balance is achieved between the cleaning ability of the formulation and its ease of use.
    [0029] A particularly preferred viscosity range for the cleaning formulation is between 28 mPa.s and 45 mPa.s.
    At this stage, the applicant wishes to comment on the measurement of the viscosity. It is well known to those skilled in the art that the viscosity of a solution varies with temperature. In particular, the viscosity of a liquid often decreases with increasing temperature.
    For the present invention, the viscosity of a cleaning formulation will be that measured at about 20 ° C. It is extremely advantageous to achieve a suitable viscosity for all the temperatures one would expect when using the cleaning formulation. For water-based cleaning formulations, the temperature range is generally between -20 ° C to about 60 ° C, although narrower ranges for the appropriate viscosity are also acceptable, such as 0 ° C to 50 ° C. ° C or 5 ° C to 35 ° C. The point is that the cleaning formulation has the required viscosity when the user is going to use it.
    [0032] In use, it is conceivable that the cleaning solution will be exposed to temperatures between about -20 ° C and about 60 ° C. The latter is the maximum temperature one would normally expect the interior of a car to reach on a hot day. Thus, in the cleaning process according to the invention and the use according to the invention, it is preferable that the viscosity is within the preferred ranges described above, as well as within the preferred temperature ranges described above.
    A working temperature range is defined between 5 and 35 ° C. This temperature range is the range to which a cleaning formulation is most likely to be exposed.
    [0034] In a particularly favorable embodiment, the formulation is thixotropic.
    Thixotropy is the property of shear thinning of a liquid as a function of time. Thixotropic liquids will experience a decrease in viscosity when subjected to force. Once this force is removed, the viscosity increases again - not instantly, but over a period of time. This is due to the reconstruction of the microstructure of the liquid which had previously been disturbed by the application of force. Such a force could be the force associated with applying the liquid to a surface, for example, or pouring it into a container. Silicates exhibit thixotropic behavior.
    [0036] It is advantageous that the cleaning formulation is thixotropic, or exhibits thixotropic behavior, at least in the temperature range in which the cleaning formulation will typically be used. This allows the formulation to easily spread over a surface to be cleaned when applied to that surface, as the viscosity will initially be low due to shear thinning. This spreading allows the cleaning formulation to completely encapsulate the dirt particles and create an even layer on the surface.
    However, shortly after applying the cleaning formulation to the surface, its viscosity will increase again (due to its thixotropic characteristics). This increase in viscosity allows for easy removal of dirt present on the surface when removing the cleaning formulation. It also makes dripping and dripping on the cleaning formulation less likely, reducing waste.
    The performance value is an index making it possible to measure the resistance to damage of the colloidal structure, that is to say the force required to destroy the colloidal structure. The higher the efficiency value, the more stable the colloidal structure.
    [0039] In a particularly advantageous embodiment, the silicate is a lithium magnesium silicate, which the Applicant has observed as exhibiting thixotropic behavior and also meeting the requirements for stability in terms of temperature and viscosity.
    [0040] The silicates generally have a layered structure.
    [0041] It is particularly preferable that the silicate has the chemical formula Li2Mg2Si3O9. Also known as Silicic Acid, Magnesium Lithium Salt, it has the CAS number 37220-90-9. During tests carried out by the Applicant, this silicate exhibited the best balance in terms of temperature stability, thixotropy and viscosity.
    Silicates incorporating Na <+>, Li <+>, Mg <2+> and Al <3+> are possible. Hectorite, CAS # 12173-47-6 is also useful.
    Another advantage of lithium and magnesium silicates lies in the fact that they are not irritating, that they are harmless and that they are non-toxic. They also make it possible to obtain a transparent or highly translucent solution, favorable from a visual and aesthetic point of view.
    Magnesium lithium silicate gels also have the ability to transfer low viscosity yield values, so that the stability of the dispersed phase is possible even in rheofluids, which is valuable compared to the most organic thickened rheotropic agents. The colloidal structure of lithium magnesium silicate gel dispersions also provide the best suspension for other fine particles in the same system, preventing sedimentation and caking of particles and ensuring consistency of system ingredients. of water. The high efficiency value of the dispersed liquid increases the efficiency of the slurry compared to the organic thickener with the same viscosity.
    As discussed above, the cleaning formulation should have a good balance between cleaning ability and ease of use - in other words, its viscosity should be neither too high nor too low. To accomplish this, in some embodiments the silicate may be present in an amount of 1% by weight or less, preferably 0.5% by weight or less, and most preferably 0.3% by weight or less by weight. compared to the cleaning formulation. It should be noted that the silicate is not the only formulation ingredient liable to have an impact on the viscosity, but that the silicate will preferably be present in these amounts.
    [0046] In preferred embodiments of the cleaning formulation, the silicate is present in an amount of at least 0.02% by weight, which the Applicant finds to obtain a minimum desirable viscosity level.
    The Applicant has determined that a particularly desirable balance in terms of viscosity and ease of use is achieved when the silicate is present in an amount between at least 0.02% by weight and up to 0.3 % in weight.
    [0048] In preferred embodiments of the cleaning formulation, the solvent comprises water. Preferably the formulation comprises more than 95% water and more preferably more than 99% water. Preferably, the water is demineralized or distilled water. The use of distilled water ensures that the cleaning formulation is essentially free of contaminants and ions, which could affect the cleaning ability of the formulation. Demineralised water is better than tap water because it does not contain “hard” ions. Water is preferred because it is environmentally friendly and safe and can be disposed of easily.
    The solvent can further comprise one or more alcohols such as ethanol, glycerol, propylene glycol and polyethylene glycol. For example, lithium magnesium silicate dispersions can be mixed with water soluble solvents such as 20% ethanol, 50% glycerin, 30% propylene glycol, and polyethylene glycol. Preferably, however, water is the only solvent used in the cleaning formulation.
    Preferably, the solids content of the composition (i.e. the total components excluding the solvent) does not exceed 10% by weight, preferably not more than 5% by weight, more preferably is not not more than 1% by weight.
    [0051] It is highly preferable that the cleaning solution is environmentally friendly and does not contaminate existing water supply sources. This is the reason why the cleaning formulation, very advantageously, does not contain added phosphates. It is also desirable that the cleaning formulation does not contain added nitrates. Preferably, the cleaning formulation does not contain added amines. Additionally, the cleaning formulation should ideally contain no added nitrogen compounds. Preferably, to avoid degradation of the solution itself, or to avoid irritation or toxicity to users, the formulation preferably does not contain highly electrophilic groups such as aldehydes and / or oxidizing agents and / or organic halides. Likewise, it is also preferable that the cleaning formulation does not contain highly nucleophilic compounds, such as nucleophilic sulfur species or nucleophilic nitrogen species. Compounds such as alcohols are acceptable.
    Advantageously, the cleaning formulation can comprise one or more surfactants. Surfactants allow the cleaning formulation to dissolve grease and oils present on a surface to be cleaned. The surfactant can be any surfactant generally known in the art.
    Preferably, at least one surfactant has a hydrophilic-lipophilic balance of at least 20, preferably at least 30 and even more preferably at least 38. The hydrophilic - lipophilic balance of an agent surfactant is a measure of the degree of hydrophilicity or lipophilicity. Preferred embodiments of the cleaning formulation will use water as a solvent, so that a formulation in which the surfactant is highly soluble (having a greater hydrophilic-lipophilic balance) is advantageous in these cases.
    In some embodiments, at least one surfactant is a water soluble salt or acid of formula ROSO3, wherein R preferably represents a C7 to C24 hydrocarbyl group, preferably an alkyl or hydroxyalkyl group having a C7-C24 alkyl component, more preferably a C12-C18 alkyl or hydroxyalkyl group, and M is H or a cation, for example an alkali metal (eg, sodium, potassium, lithium), ammonium or ammonium cation. substituted ammonium (for example, methyl, dimethyl and trimethyl ammonium cations and quaternary ammonium cations, such as tetramethyl ammonium and dimethylpiperdinium cations and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine and their mixtures.
    The Applicant has determined that advantageously, the formulation comprises sodium dodecylsulfate as surfactant. It is a readily available, highly water soluble and effective surfactant. It is also compatible with anionic and nonionic surfactants. It has good performance in emulsification, permeation, cleaning and dispersion.
    [0056] At least one surfactant may be a salt or a water soluble acid of formula RO (A) mSO3X, wherein R is an unsubstituted C10 to C24 alkyl or hydroxyalkyl group having a C10 to C24 alkyl component, preferably a C12-C20 alkyl or hydroxyalkyl group, more preferably a C12-C18 alkyl or hydroxyalkyl group, A is an ethoxy or propoxy unit, m is greater than zero, typically between about 0.5 and about 6, more preferably between about 0.5 and about 3, and X is H or a cation which may be, for example, a metal cation (eg, sodium, potassium, lithium, calcium, magnesium, etc.), ammonium or substituted ammonium cation.
    Preferably, the surfactant is present in an amount of between 0.05 and 0.075% by weight.
    [0058] In advantageous embodiments, the cleaning composition can further comprise a polymer, preferably a polymer which is soluble and / or swellable in the solvent, such as carboxymethyl cellulose, and / or polyacrylate and / or substituted / unsubstituted polyether. Such a substance can perform various functions.
    [0059] This may have the effect of further thickening the cleaning formulation, which helps to increase the viscosity. In this way, it may be possible to use a reduced amount of the silicate, for example.
    [0060] It can also act as a flocculating agent, causing the aggregation of fine particles and improving the cleaning capacity of the cleaning formulation.
    Another undoubtedly advantage is that it improves the ability of the cleaning formulation to form a film on the surface which has been cleaned, which protects the surface and also provides a certain level of gloss.
    [0062] This can also help reduce residual marks left by water, since the protective layer left by the cleaning formulation prevents the formation of these marks.
    The most preferred shining agent polymer is oxidized polyethylene - CAS # 68441-17-8. Oxidized polyethylene is beneficial because it is non-toxic, resistant to bacterial degradation, and provides a visually pleasing (as well as protective) shine after use. Oxidized polyethylene also exhibits good temperature stability. By acting as a shining agent, oxidized polyethylene does not leave residual traces.
    [0064] Carboxymethyl cellulose is another example of a suitable polymer. Sodium carboxymethyl cellulose provides a homogeneous and stable emulsion. It plays the role of flocculation, chelation and emulsification, increases the degree of lubrication (lubricity) of the cleaning solution and makes it possible to wipe off said cleaning solution more easily.
    [0065] Lubrication is a measure of the ability of a substance to act as a lubricant. It is not the same as viscosity - indeed, it is possible that two substances of the same or very similar viscosity have different lubricating properties. Lubrication of a substance can be measured by assessing the degree of wear that occurs between two parts when that substance serves as a lubricant between those parts. Higher lubricity means that dirt on a surface slides more easily over that surface without scratching it. To achieve the appropriate lubricity, preferably, the polymer is present in an amount between 0.5% by weight and 0.1% by weight.
    [0066] Where both the carboxymethyl cellulose and the oxidized polyethylene are present in the cleaning formulation, favorable properties are obtained when the carboxymethyl cellulose is present in an amount between 0.05% by weight and 0.1% by weight and / or the oxidized polyethylene is present in an amount between 0.01% by weight and 0.1% by weight.
    [0067] In order to adjust the pH, the cleaning formulation can further comprise an acid, such as an organic acid, for example citric acid. It is most preferable that the cleaning formulation has a pH between 6 and 8, preferably between 6.5 and 7.5, and most preferably between 7.0 and 7.2. A pH closer to neutral is less corrosive and is gentle on the skin. In addition, the Applicant has found that the viscosity of the cleaning formulation generally peaks in this pH range - generally at a pH equal to or close to 7. Lower viscosities are observed for solutions having a more alkaline pH, and viscosities. even lower are observed for solutions having an acidic pH.
    A particularly favorable embodiment of the invention provides a cleaning formulation consisting essentially of the following elements:<tb> <SEP> water;<tb> <SEP> a hydrated lithium magnesium silicate or a silicate of formula H2LiMgNaO12Si4 (CAS # 37220-90-9);<tb> <SEP> oxidized polyethylene is (CAS # 68441-17-8);<tb> <SEP> M-carboxymethyl cellulose (preferably sodium carboxymethyl cellulose, CAS # 9004-32-4);<tb> <SEP> M-dodecyl sulfate (preferably sodium dodecyl sulfate, CAS # 151-21-3);<tb> <SEP> M-carbonate (preferably sodium carbonate, CAS # 497-19-8);<tb> <SEP> M-citrate (preferably sodium citrate, CAS # 77-92-9);<tb> <SEP> where M is at least one type of counterion.
    By "consisting essentially of" is meant that no other component is added intentionally. Small amounts of impurities may be present, but generally such a formulation will only contain the above ingredients. In such a formulation, it is desirable that the only counterion present in solution is essentially sodium. This means that apart from the impurities, no other counterion is present or intentionally added. (Note that this does not mean that the silicate can only contain sodium ions.)
    [0070] In other embodiments, the only counterions present will be those which do not adversely affect the cleaning ability of the cleaning formulation. For example, there will be no “hard” ions (when the word hard is meant to mean ions associated with hard water, such as calcium and magnesium. This does not apply to silicate itself. - even in cases where the silicate contains magnesium ions or calcium).
    It is acceptable that other additives are present in the solution as a thickening agent or additional lubricating agent. Examples of other additives which are acceptable additional viscosity increasing agents are monormorillonite (organic bentonite), hectorite, fumed silica, methylcellulose, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, polyvinypyrrolidone, polyvinyl alcohol, polyacrylamide, polyethylene wax, polyacrylate (sodium), polyurethane and polyethylene oxide. Hectorite, fumed silica, methyl cellulose, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, polyviny-pyrrolidone, polyvinyl alcohol, polyacrylamide, polyethylene wax, polyacrylate (sodium), polyurethane and polyethylene oxide is perfectly suitable. Among these, the additives having the most advantageous thermal stability are fumed silica, polyvinyl alcohol, polyvinylpyrrolidone, poly (ethylene oxide), polyurethane and polyethylene. The cleaning formulation may further comprise one or more of these compounds.
    [0072] The cleaning formulation can include an additional shine agent. It is a substance capable of producing a sheen or shine on a surface. The shine on a surface usually comes from the fact that a substance is able to fill small holes, scratches, cracks or holes on the surface, thus making the surface smoother. A smoother surface reflects light more evenly and therefore appears brighter. A shining agent will therefore be a substance capable of achieving this result.
    An example of an additional shining agent is a wax.
    As a variant or in addition, the shining agent can comprise a salt or an acid, for example a sodium salt, of a substituted or unsubstituted alkylcarboxylate, the number of carbon atoms in the alkyl chain being included between 16 and 22, preferably between 17 and 19, more preferably 18.
    The alkyl carboxylate can be substituted by at least one additional hydrophilic group, for example a hydroxy group, preferably by one or more of carbon atoms 11, 12 and / or 13, very particularly preferably by the carbon 12. In particular, the alkyl carboxylate may be a 12-hydroxyoctadecanoate group, preferably the sodium salt thereof.
    [0076] The cleaning formulation can further include a source of sodium ions, such as sodium carbonate. This compound plays two roles in the cleaning formulation of the invention:<tb> 1. <SEP> It cooperates with the surfactant to form an improved detergent.<tb> 2. <SEP> Increase in the concentration of Na <+> in the formulation - the silicate exhibits a more stable viscosity and better temperature resistance, with the participation of sodium ions.
    Another aspect of the invention provides a method of cleaning a surface, the method comprising the following steps:<tb> <SEP> providing the cleaning formulation of the invention;<tb> <SEP> Apply the undiluted cleaning formulation to the surface.
    Preferably, the method comprises the following steps:<tb> <SEP> provide a first microfiber cloth;<tb> <SEP> put the first microfiber cloth in contact with the undiluted cleaning formulation;<tb> <SEP> and clean the surface by contacting the first microfiber cloth with a surface to be cleaned so as to apply the undiluted cleaning formulation to the surface.
    Preferably, the method further comprises the following steps:<tb> <SEP> provide a second microfiber cloth<tb> <SEP> rub the surface with the second microfiber cloth to remove the cleaning formulation and polish the surface to be cleaned.
    [0080] In the method, the first microfiber fabric and the second microfiber fabric comprise fibers, each fiber preferably comprising between 50 and 150 fibrils, for example 75 fibrils, preferably in which the fibers have a largest diameter between 0.2 and 1 micrometer.
    [0081] The surface is a hard surface and preferably includes metal, ceramic, enamel, varnished or sealed surfaces, painted surfaces, plastic, leather, glass or wood.
    Preferably, the surface is an external surface of a vehicle such as a car. However, the surface can be an internal surface of a vehicle.
    The use of a microfiber cloth has several particular advantages. First, such a cloth is particularly soft and will not scratch the surface to be cleaned. This is especially important when the surface is the paint of a car, for example.
    [0084] Second, the microfibers of the fabric (as opposed to the "macrofibers" of a standard non-microfiber cloth) facilitate the capture of particles of dirt, gravel and sand. The tiny fibers are able to bury the parts at the bottom of the fabric structure. This effectively removes dirt and also prevents it from escaping, allowing it to drop back onto the clean surface or drag it across the surface by the cloth and scratch it.
    Third, the microfibers are believed to facilitate an electrostatic interaction between the cleaning solution and the fibers. This further improves the ability of the cloth to lift dirt from the surface to be cleaned.
    [0086] The method may include the additional step of removing the cleaning formulation and polishing the surface using a second microfiber cloth directly after contact of the first microfiber cloth with the surface to be cleaned. This way, the cleaning solution does not stay on the surface - instead, the solution and encapsulated dirt are quickly removed. This reduces unnecessary loss of cleaning solution by evaporation. It also allows for simultaneous glossing or polishing of the surface, so there is no need to go to a separate step or separate gloss formulation.
    [0087] The Applicant has found that a favorable microfiber fabric structure is one in which the first microfiber fabric and the second microfiber fabric comprise fibers, each fiber comprising between 100 and 150 fibrils, preferably in which the fibers have a widest diameter between 0.2 and 1 micrometer. Such a fabric has an increased fiber surface area (up to 50 times that of a normal towel), which increases the porosity of the fabric. This allows rapid and significant absorption of the cleaning solution.
    [0088] The microfiber fabric preferably comprises at least two different materials, for example polyester and chinlon. The majority of the microfiber fabric (over 50% and preferably about 80%) consists of polyester and the rest of chinlon.
    The polyester is very resistant and the chinlon absorbs well. By blending the fabric with high strength and good water absorption, the towel has good water absorption rate. In some cases, that's about 11.4 times, for example.
    The fibers used in the towel can be described with the code 160D75F. 160D indicates the fineness of the fibers; 75F means that a fiber contains 75 fine fibers.
    The towel is woven by a weaving brush, shaped, composed, double-sided composite and sewn.
    [0092] Alternatively, the microfiber towel is made of about 80% dacron (polyethylene terephthalate), which is tough, and 20% chinlon (a type of nylon), which is very absorbent.
    [0093] A container in which the formulation is stored and one or more cloths, as indicated above, can be supplied as a kit.
    Another aspect of the invention provides a process for preparing the formulation described here comprising the following steps:<tb> (a) <SEP> provide a silicate of the formula H2LiMgNaO12Si4 or a silicate of the formula MwExSiyOz aH2O, where M is an alkali metal and E is an alkaline earth metal, where w, x, y and z are all numbers integers greater than 0 and in which a is zero or an integer greater than zero;<tb> (b) <SEP> dissolving or dispersing the silicate in a solvent; preferably water, for example demineralized or distilled water, wherein the silicate is present in an amount in the range of 0.01 to 1.5% by weight.
    [0095] To achieve certain embodiments of the cleaning formulation, a user can weigh the appropriate amount of silicate and, optionally, polymer, surfactant (sodium dodecyl sulfate) and any other component present (eg. example, sodium carbonate). The materials are mixed and solvent is added (such as water), continuing to agitate to ensure the materials are completely dissolved. Raising the water temperature judiciously can speed up the dissolution rate, but the highest water temperature should preferably not exceed 50 ° C. In addition, it is preferable that containers and mixing equipment allowed to contact the liquid are non-metallic. The pH value will be about 8.5 at the end of mixing, but a small amount of acid (such as citric acid) can be added to the liquid to adjust the pH, preferably about 7.0 at 7.2.
    A fifth aspect of the invention proposes to use the present cleaning formulation described herein, to clean a surface, the surface preferably comprising metallic, ceramic, enameled, varnished or sealed surfaces, painted surfaces, plastic. , leather, glass or wood, preferably belonging to a vehicle.
    Example according to the invention
    [0097]<tb> 37220-90-9 <SEP> magnesium lithium silicate <SEP> 0.02-0.30%<tb> 68441-17-8 <SEP> Oxidized polyethylene <SEP> 0.01-0.10%<tb> 151-21-3 <SEP> Sodium dodecyl sulfate <SEP> 0,05-0,075%<tb> 9004-32-4 <SEP> Carboxymethylcellulose sodium <SEP> 0.05-0.1%<tb> 497-19-8 <SEP> Soda ash <SEP> 0.05-0.1%<tb> 77-92-9 <SEP> Citric acid <SEP> Adjust pH 7.0-7.1<tb> 7732-18-5 <SEP> Demineralized water <SEP> 99.82-99.325%
    The tests carried out by the Applicant on viscosity increasing agents / thickeners show that the viscosity of a liquid suspension of lithium magnesium silicate hydrate at a concentration of 1 g / L does not fall below of 35 mPa.s even after 40 days when stored at a temperature of 20 ° C. Further, when subjected to temperatures up to 60 ° C for 24 hours, the viscosity of said solution did not drop below about 33 mPa.s. When using lithium magnesium silicate hydrate, it means that the hydrate contains 50 g of water per 1000 g of compound. However, it is not considered essential to use the hydrate and the anhydrous form could be perfectly suitable.
    On the contrary, solutions of the prior art containing polyacrylate, instead of silicate, it appeared that polyacrylate at a concentration of 1 g / L exhibited less advantageous properties. Such a solution showed a marked decrease in viscosity after 40 days at 20 ° C (viscosity was reduced from about 38 mPa.s to about 9 mPa.s). Heating at 60 ° C for 5 hours resulted in a further decrease in viscosity compared to that of water.
    [0100] Poly (N-isopropylacrylamide) at 1 g / L showed a decrease in viscosity from about 38 mPa.s to about that of water after only 7 days at 20 ° C.
    [0101] Methylcellulose at 1 g / L showed a decrease in viscosity from about 18 mPa.s to about 11 mPa.s after 40 days at 20 ° C. At temperatures above 45 ° C, this solution exhibits a thermosetting behavior, resulting in a viscosity increasing considerably up to more than 40 mPa.s.
    权利要求:
    Claims (38)
    [1]
    1. Cleaning formulation comprising:a solvent;silicate chosen from magnesium and lithium silicates and mixtures thereof;wherein the silicate is present in a total amount in the range of 0.01 to 1.5% by weight.
    [2]
    2. Cleaning formulation comprising:a solvent;silicate selected from the group consisting of silicate of formula;silicate of the formula MwExSiyOz · aH2O, in which M is an alkali metal and E is an alkaline earth metal;where w, x, y and z are all numbers greater than 0 and where a is 0 or a number greater than 0;and their mixtures;wherein the silicate is present in a total amount in the phase of 0.01 to 1.5% by weight.
    [3]
    3. Cleaning formulation comprising:a solvent, preferably water;silicate present in an amount in the range of 0.01 to 1.5% by weight;at least one polymer;wherein the formulation has a viscosity of at least 20 mPa.s, preferably at least 28 mPa.s, measured at a shear rate of 11.3 cm / s and a temperature of 20 ° C.
    [4]
    4. Formulation according to any one of the preceding claims, having a viscosity of up to 100 mPa.s, preferably up to 75 mPa.s, more preferably up to 45 mPa.s.
    [5]
    5. A formulation according to any preceding claim, wherein the formulation is thixotropic.
    [6]
    6. Formulation according to any one of the preceding claims, in which the silicate comprises silicate of formula MwExSiyOz · aH2O in which M = Li and E = Mg, preferably also in which w = 2, x = 2, y = 3 and z = 9.
    [7]
    7. A formulation according to any preceding claim, wherein the silicate comprises magnesium lithium silicate CAS # 37220-90-9, preferably wherein the silicate consists essentially of lithium magnesium silicate CAS # 37220. -90-9.
    [8]
    8. A formulation according to any preceding claim, wherein the silicate is present in an amount of 1% by weight or less, preferably 0.5% by weight or less, most preferably 0.3% by weight. weight or less relative to the cleaning formulation.
    [9]
    9. A formulation according to any preceding claim, wherein the silicate is present in an amount of at least 0.02% by weight.
    [10]
    10. A formulation according to any preceding claim, wherein the solvent is water and the composition preferably comprises at least 95% water, preferably at least 99% water, wherein water is preferably demineralized or distilled water.
    [11]
    11. A formulation according to any preceding claim, further comprising one or more surfactants.
    [12]
    12. The formulation of claim 11, wherein at least one surfactant has a hydrophilic-lipophilic HLB balance of at least 20, preferably at least 30 and even more preferably at least 38.
    [13]
    13. A formulation according to claims 11 or 12, wherein at least one surfactant is a water-soluble salt or acid of formula ROSO3M, wherein R preferably represents a C7-C24 hydrocarbyl group, preferably a group. alkyl or hydroxyalkyl having a C7 to C24 alkyl component, more preferably a C12 to C18 alkyl or hydroxyalkyl group, and M is H or a cation, for example an alkali metal cation (eg, sodium, potassium, lithium), ammonium or substituted ammonium (for example, methyl, dimethyl and trimethyl ammonium cations and quaternary ammonium cations, such as tetramethyl ammonium and dimethyl piperdinium cations and quaternary ammonium cations derived from alkylamines such as l ethylamine, diethylamine, triethylamine and mixtures thereof.
    [14]
    14. A formulation according to any preceding claim, wherein the formulation comprises sodium dodecyl sulfate.
    [15]
    15. A formulation according to any one of claims 11 to 14, in which at least one surfactant may be a salt or a water-soluble acid of formula RO (A) mSO3X, in which R is an alkyl or hydroxyalkyl group. unsubstituted C10 to C24 having a C10 to C24 alkyl component, preferably a C12 to C20 alkyl or hydroxyalkyl group, more preferably a C12 to C18 alkyl or hydroxyalkyl group, A is an ethoxy or propoxy unit, m is greater than zero, typically included between about 0.5 and about 6, more preferably between about 0.5 and about 3, and X is H or a cation which may be, for example, a metal cation (eg, sodium, potassium, lithium, calcium, magnesium , etc.), an ammonium or substituted ammonium cation.
    [16]
    16. A formulation according to any one of claims 11 to 15, wherein the surfactant is present in an amount of 0.05 to 0.075% by weight.
    [17]
    17. A formulation according to any preceding claim, further comprising a polymer.
    [18]
    18. The formulation of claim 17, wherein the polymer comprises sodium carboxymethyl cellulose.
    [19]
    19. A formulation according to claim 17 or claim 18, wherein the polymer comprises oxidized polyethylene CAS # 68441-17-8, preferably having an average molecular weight between 1,000,000 and 2,000,000 Da.
    [20]
    20. A formulation according to any preceding claim, wherein the sodium carboxymethyl cellulose is present in an amount of 0.05% by weight to 0.1% by weight and / or the poly (ethylene oxide) is. present in an amount of 0.01% by weight to 0.10% by weight.
    [21]
    21. A formulation according to any preceding claim, further comprising an organic acid, preferably citric acid.
    [22]
    22. A formulation according to any one of the preceding claims, having a pH of 6 to 8, preferably 6.5 to 7.5, more preferably between 7.0 and 7.2.
    [23]
    23. A cleaning formulation according to any one of the preceding claims, consisting essentially of:water;lithium magnesium silicate CAS # 37220-90-9;oxidized polyethylene CAS # 68441-17-8;M-carboxymethylcellulose;M-dodecyl sulfate;M-carbonate;M-citrate;where M is at least one type of counterion.
    [24]
    24. The formulation of claim 23, wherein the counterion is sodium only.
    [25]
    25. A method of cleaning a surface, the method comprising the following steps:(a) providing the cleaning formulation according to any one of the preceding claims;(b) apply the undiluted cleaning formulation to the surface.
    [26]
    26. The method of claim 25, the method comprising the following steps:(a1) provide a first microfiber cloth;(a2) contacting the first microfiber cloth with the undiluted cleaning formulation; and(c) cleaning the surface by contacting the first microfiber cloth with a surface to be cleaned so as to apply the undiluted cleaning formulation to the surface.
    [27]
    27. The method of claim 25 or claim 26, further comprising:(d) provide a second microfiber cloth(e) rub the surface with the second microfiber cloth to remove the cleaning formulation and polish the surface to be cleaned.
    [28]
    28. The method of claim 27, wherein the first microfiber cloth and the second microfiber cloth comprise fibers, each fiber preferably comprising between 50 and 150 fibrils, for example 75 fibrils, preferably in which the fibers have a diameter. the largest between 0.2 and 1 micrometer.
    [29]
    29. A method according to any one of claims 25 to 28, wherein the surface comprises metallic, ceramic, enamel, varnished or sealed surfaces, painted surfaces, plastic, leather, glass or wood.
    [30]
    30. A method according to any one of claims 25 to 29, wherein the surface is an external surface of a vehicle.
    [31]
    31. The method of claim 30, wherein the amount of the cleaning formulation used is between 200 and 1000 ml, preferably between 300 and 500 ml.
    [32]
    32. A method according to any one of claims 25 to 31, wherein the surface is an internal surface of a vehicle.
    [33]
    33. Process for preparing the formulation according to any one of claims 1 to 24, comprising the following steps:(a) providing the silicate;(b) dispersing the silicate in a solvent; preferably water, for example demineralized or distilled water.
    [34]
    34. Use of the cleaning formulation according to one of claims 1 to 24 for cleaning a surface, the surface preferably comprising metallic, ceramic, enameled, varnished or sealed surfaces, painted surfaces, plastic, leather, glass or wood, preferably belonging to a vehicle.
    [35]
    35. The use of claim 34, wherein the surface is an external surface of a vehicle.
    [36]
    36. The use of claim 34, wherein the surface is an internal surface of a vehicle.
    [37]
    37. Kit for cleaning a surface, in particular the external or internal surface of a vehicle, comprising a container which contains a present cleaning formulation according to any one of claims 1 to 24 and at least one cloth in microfiber.
    [38]
    38. Kit according to claim 37, comprising two microfiber cloths, preferably in which the two cloths have a different structure.
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    同族专利:
    公开号 | 公开日
    EP3914680A1|2021-12-01|
    GB2581142A|2020-08-12|
    US20210222086A1|2021-07-22|
    WO2020152299A1|2020-07-30|
    GB201901413D0|2019-03-20|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN201910062215|2019-01-23|
    GB1901413.3A|GB2581142A|2019-01-23|2019-02-01|Compositions and their use|
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