FR2906255A1 - CLEANING PRODUCT IN SOLID FORM OF GLASS SURFACES OF A VEHICLE - Google Patents

Abstract

This cleaning product glazed surfaces, including a vehicle, of the type comprising at least one cleaning agent, the product being in solid form and being adapted to form an aqueous cleaning solution. This product comprises at least one ingredient, in solid form, adapted to lower below 0 ° C the freezing point of the aqueous solution.

Description

The invention relates to a product for cleaning glass surfaces,

  in particular a vehicle, of the type comprising at least one cleaning agent, the product being in solid form and being adapted to form an aqueous cleaning solution.

  Glazed surfaces refer to both the windshield and the side and rear windows of a land, rail, sea or air vehicle. To ensure efficient cleaning of these glazed surfaces, ready-to-use liquid products are known, which are poured into a tank, possibly after dilution. These products are packaged in containers of a relatively large capacity, usually two to five liters. Their handling and storage are not easy. Moreover, filling the windshield washer reservoir is often difficult, given the often inaccessible position of the tank orifice, the latter being generally located in the engine compartment of the vehicle. It happens that the cleaning product is accidentally poured next to the tank. To remedy this, pellets are known to be diluted in deionized water. Nevertheless, these pellets do not allow the use of the washer whatever the weather conditions.

  It is these disadvantages that the invention intends to remedy more particularly by proposing an effective product in any season, directly usable in the windshield washer reservoir and avoiding any risk of overturning when filling the tank.

For this purpose, the subject of the invention is a cleaning product of the aforementioned type, characterized in that it comprises at least one ingredient, in solid form, adapted to lower the freezing point of said aqueous solution.

Thus, this product, in solid form and easy to implement, allows use both in summer and winter by limiting the risk of freezing the solution. According to advantageous but non-obligatory aspects of the invention, the product may incorporate one or more of the following characteristics: The ingredient, in solid form, adapted to lower below 0 ° C the freezing point comprises of sodium acetate in concentrations of 25 to 50% by weight relative to the total mass. - This ingredient comprises sodium sulfate in concentrations of 5 to 11% by weight relative to the total mass. The product comprises at least one ingredient ensuring effervescence dissolution of the product. - The effervescent ingredient comprises a weak acid, including boric acid and / or citric acid, associated with a weak base, including sodium bicarbonate. The product, before dissolution, is in the form of pellets. - The mass of a pellet is between 4.5 and 6.5 grams. the composition of a pellet, per 100 g of product is: sodium lauryl sulphate: 2 g to 10 g, 2906255 ethoxylated fatty alcohol: EDTA sodium acetate: sodium sulphate: 5-acid boric acid: - citric acid: - sodium bicarbonate: 2 g to 10 g, 1 g to 5 g, 25 g to 50 g, 5 g to 11 g, 10 g to 20 g, 2 g to 4 g, 20 g to 60 g. - The product includes a dye. - The product includes an anti-scale ingredient.

The invention will be better understood and other advantages thereof will appear more clearly on reading the following description of a product according to the invention, given solely by way of example. In a vehicle, be it a motor vehicle, a bus or a truck, a railway vehicle, such as a motor vehicle or a wagon, an aircraft or a ship, the glazed surfaces, whether front, rear or side, are exposed to soiling such as dust and / or road film. When moving the vehicle, they are also exposed to insects crashing above and / or bird droppings. The vehicles are therefore equipped with a device for cleaning at least some parts 20 of these glazed surfaces. Such a device comprises, in addition to windscreen wiper blades, a reservoir for a cleaning liquid. This tank supplies pressurized liquid wiper blades. It is common that in winter the outlets of the liquid are blocked by ice. This ice is formed by the solidification of the cleaning liquid. This sensitivity to climatic conditions is increased by the fact that, generally, the tank, the pump and the pipes are not located in a thermally insulated zone and that the outlet orifices are of small diameter. In other words, in winter, the washing function of glass surfaces is not always available, which can be detrimental to the driver's vision and therefore the safety of the vehicle. The glass surface cleaning product object of the invention is, before its implementation in the windshield washer reservoir, in a solid and compact form. These include pellets whose dimensions and shapes are adapted to be easily inserted into the washer reservoir, through the neck of the latter. These pellets, cylindrical, have a diameter of about 20 millimeters and a height of about 5 millimeters. Alternatively, the product is in the form of a powder. In any case, the product is easy to dissolve, with a concentration or in a predetermined concentration range, in a volume of water corresponding to a content commonly encountered for tanks of land vehicles, that is to say between 2 liters and 6 liters. The product is adapted to be dissolved in tap water without requiring distilled or demineralized water as the solvent. In any case, the product is adapted to be easily and completely dissolved in the windshield washer reservoir, without the need for agitation, heating or the addition of another ingredient to increase the dissolution. In particular, no undissolved solid particle must remain in the final solution because this particle may clog the product outlets.

2906255 5 This cleaning product contains different ingredients. It contains at least two ingredients or compounds having a cleaning action, that is to say ingredients for removing the road film and / or dust and eliminate animal stains such as insects or 5 bird droppings. For this purpose, an anionic surfactant-type compound, for example sodium lauryl sulphate, combined with a nonionic surfactant compound, for example an ethoxylated fatty alcohol, is used. These two compounds are, in this case, associated with a sequestering type compound for complexing the limestone of the dilution water. Such a compound also makes it possible to limit the risk of scaling in the case of hard water. This is, for example, EDTA (ethylene diamine sodium tetraacetate). Alternatively, other products avoiding scale can be used, it is for example sequestering sodium nitrilotriacetate, sodium gluconate or phosphonate type.

The concentrations used for these different compounds are from 2 to 10% by weight for each of the anionic surfactant and nonionic surfactant type compounds, and from 1 to 5% by weight for the sequestering agent. In particular, the following concentrations are used to make 100 g of product, therefore pellets, before dissolution: sodium lauryl sulphate: 2 g to 10 g ethoxylated fatty alcohol: 2 g to 10 g EDTA: 1 g to 5 g . Alternatively, the anionic surfactant may be of the sulfonate type and the nonionic surfactant of the polyglucoside type.

In all cases, these compounds are chosen to be used in solid form and, in particular, to be pelleted in an easy manner while having a high solubility. The production of pellets is carried out by techniques known per se, for example by means of a tablet-type apparatus. To these ingredients forming the cleaning part, at least one and preferably two ingredients or compounds are combined to lower the freezing point of the final aqueous solution below 0 C. In other words, it is added, in the form of solid, antifreeze so as to avoid the formation of crystals in the final aqueous solution from 0 C. For this, use is made of salts such as sodium acetate and, if necessary, sodium sulfate. At least one of these salts, in this case sodium acetate, is incorporated in a proportion of up to 50% by weight relative to the total mass.

Preferably, the following concentrations are used to make 100 g of product, before dissolution: sodium acetate: from 25 g to 50 g, sodium sulphate: 100 g. Other salts may be used, such as chloride of sodium, calcium chloride or potassium acetate, in proportions ranging from 25 to 50% by weight relative to the total mass. In all cases, if the concentration of salts is increased, the freezing point of the final aqueous solution is lowered accordingly. For example, a concentration of 50% sodium acetate or potassium acetate permel: to lower the point of freezing at -4 C with a dosage of a pellet to 2 I of water. The freezing point is lowered to 8 C with two pellets per 2 liters of water or three pellets per 2.5 liters. The maximum useful concentration of salts is about 1% by weight. In fact, at high concentrations, such a cleaning product, because it is an aqueous solution with a high salt content, leaves, when cleaning, white marks on the glass surface and / or the others. parts of the vehicle at the edge of the glazed area. Similarly, if a too small amount of salts is added, the freezing point of the final aqueous solution does not fall sufficiently low relative to that of the fresh water, and there is a risk of problem of solidification of the solution in the vicinity of 0 C in the nozzles of the washer. In this sense, a minimum of 25% by weight of salts relative to the total mass is required. Tests have shown that a non-freezing solution can be obtained at up to 8 C using pellets containing 50% by weight of salts based on the total mass. In particular it is pellets whose mass is between 4.5 and 6.5 grams, preferably about 6 grams comprising 50% by weight of soclium acetate and 10% by weight of sodium sulfate. The dosage recommended to preserve a liquid solution at 20 -8 C is three pellets of product for 2.5 I of tap water or two tablets for 2 I of water. The cleaning product also comprises at least one ingredient facilitating the dissolution in water of the other compounds. Typically, it is a mixture of compounds allowing effervescence of the product. This effervescence is achieved by the combination of two weak acids with a weak base. The acid is boric acid at concentrations of the order of 7 to 20% by weight relative to the total mass, advantageously 10 to 15%, combined with citric acid at concentrations of the order from 1 to 4% by weight relative to the total weight, advantageously from 2 to 4%. Citric acid reduces the time of effervescence. In addition, citric acid forms a citrate which has a cleaning action and a complexing action against calcium. The weak base is sodium bicarbonate at concentrations of the order of 15 to 60% by weight relative to the total mass. The following concentrations are used to make 100 g of product before dissolution: boric acid: 10 g to 20 g, citric acid: 2 g to 4 g, sodium bicarbonate: 20 g to 60 g.

Alternatively, another weak acid such as adipic acid and another weak base such as sodium carbonate may be used. A product in the form of pellets is obtained, the average composition of which is: For 100 g For a pellet of 6 g sodium lauryl sulphate: 2 g to 10 g, 0.12 g to 0.6 g, ethoxylated fatty alcohol 2 g to 10 g, 0.12 g to 0.6 g, EDTA: 1 g to 5 g, 0.06 g to 0.3 g, sodium acetate: 25 g to 50 g, 1.5 g to 3 g, sodium sulfite: 5 g to 11 g, 0.3 g to 0.3 g, 66g, 2906255 9 - boric acid: 10g to 20g, 0.6g to 1.2g, citric acid: 2g to 4g, 0.12g to 0.24g, sodium bicarbonate: g to 60 g. 1.2 g to 3.9 g. The pellets dissolve directly in the ice reservoir. Indeed, a dissolution in a container prior to its incorporation into the tank is possible, but in this case the risk of overturning the product when it enters the tank reappears. Other compounds may be included in the pellet, for example they may be colorants for tinting the final liquid or odorous substances to give a particular odor to the final product. The product pellet is adapted to be dissolved in tap water. Such a device makes it easy to store and handle the cleaning product without the risk of wasting the product during its incorporation into the tank. A bitterer can be incorporated into the lozenge to limit the risk of ingestion by a child.

Claims (2)

  1. A product for cleaning glass surfaces, in particular a vehicle, of the type comprising at least one cleaning agent, the procluct being in solid form and being adapted to form an aqueous cleaning solution, characterized in that it comprises less an ingredient, in solid form, adapted to lower below 0 C the freezing point of said aqueous solution.   2. Product according to claim 1, characterized in that said ingredient comprises sodium acetate in concentrations of 25 to 50% by weight relative to the total mass. .3. Product according to Claim 1, characterized in that the said ingredient comprises sodium sulphate in concentrations of 5 to 11% by weight relative to the total mass. 4. Product according to one of the preceding claims, characterized in that the product comprises at least one ingredient ensuring effervescence dissolution of the product. 5. Product according to claim 4, characterized in that the effervescent ingredient comprises a weak acid, especially boric acid and / or citric acid, associated with a weak base, especially sodium bicarbonate. 6. Product according to one of the preceding claims, characterized in that the product, before dissolution, is in the form of pellets. 7. Product according to claim 6, characterized in that the mass of a pellet is between 4.5 and 6.5 grams. 8. Product according to claim 6 or 7, characterized in that the composition of a pellet, per 100 g of product, is: sodium lauryl sulphate: 2 g to 10 g, ethoxylated fatty alcohol: 2 g to 10 g, 5-EDTA: 1 g to 5 g, sodium acetate: 25 g to 50 g, sodium sulphate: 5 g to 11 g, boric acid: 10 g to 20 g, citric acid: 2 g to 4 g g, 10 - sodium bicarbonate: 20 g to 60 g. 9. Product according to one of the preceding claims, characterized in that it comprises a dye. 10. Product according to one of the preceding claims, characterized in that it comprises an anti-scale ingredient. 15