ES2943237T3 - Self-adhesive solid formulation for hygiene and fragrance of sanitary ware - Google Patents

Abstract

Self-adhesive solid formulation for hygiene and fragrance of sanitary ware that comprises inorganic salts, anionic surfactants, nonionic surfactants of glycosidic derivation, fragrances, which is characterized because the components it contains are products of natural origin and because it has a water content lower than 15% by weight on the weight of the solid self-adhesive formulation. Another object of the present invention are products containing said solid self-adhesive formulation that are manually applicable due to the presence of a non-adhesive water. -soluble film arranged on the opposite surface to that which adheres to the wall of the toilet. (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Self-adhesive solid formulation for hygiene and fragrance of sanitary ware

field of invention

The object of the present invention refers to a self-adhesive solid formulation and related products that contain said formulation, which, when applied to the walls of sanitary ware, gradually release sanitizing substances with each discharge of water from said sanitary ware.

background technique

Examples of state-of-the-art finished self-adhesive commercial products applicable to the walls of sanitary ware, such as toilets (or more commonly toilets), to ensure hygiene and/or the delivery of aromatic substances in each jet of water are known.

In general, these products are generally presented in the form of a gel and are dispensable by means of containers, in order to prevent the gel from coming into contact with the user's hands during the application step on the walls of the toilet. The gel is contained in such applicators/dispensers which are generally provided with a plunger or soft compressible walls. Gels are applied to the walls of the toilet by pushing the plunger of such dispensers with your fingers or by pressing the soft walls of the bowl with your fingers. In this way, the gel is pushed outwards in contact with the walls of the toilet to which it adheres.

These containers are particularly made of plastic. For the current eco-sustainability standards, it is increasingly desirable to have products that require less and less use of this type of material.

An example of a known self-adhesive formulation contained in dispensers of this type is that described in document EP1325103. It is a pasty gel composed of an adhesion promoter, surfactants and water. In this case, water is essential to promote adhesion of the adhesion promoter to the surface of the sanitary ware. In particular, as reported in the document EP1325103, a water content of at least 20% by weight, preferably from 40 to 70% by weight with respect to the weight of the total composition, is necessary to obtain adequate adhesion. of said promoter to the surface of the toilet.

On the other hand, a high water content in such formulations is generally not advantageous. In fact, after opening the package of the finished product, since such formulations contain not only hydrophilic but also hydrophobic components, the separation of the two hydrophobic and hydrophilic phases could occur. A high concentration of water could also lead to the generation and consequent stagnation of microbial loads or mold in the product that remains inside the container and still to be used, especially if it is not closed correctly and therefore remains in contact with the air. Document WO2012/017276 A1 discloses adhesive blocks for toilet cleaning comprising alkyl esters of sulfuric acid, alkyl polyglucosides and fragrance.

Finally, if the toilet is not used for a certain time, the water contained in the gel tends to evaporate, drying out the product which not only has a worse aesthetic appearance, but is also less effective once the toilet is reused.

Furthermore, the components described in this formulation are all synthetic and therefore less than satisfactory in terms of current eco-sustainability standards. Accordingly, a need is felt to overcome the aforementioned drawbacks.

Summary of the invention

The applicant has now surprisingly found that it is possible to overcome these drawbacks with the present invention relating to a self-adhesive solid formulation for the hygiene and fragrance of sanitary ware comprising:

• between 11% and 80% by weight based on the total weight of said self-adhesive solid formulation of a mixture (a) of at least one alkaline salt of an inorganic and/or organic acid;

• an anionic surfactant (b) comprising:

- from 5 to 45% by weight based on the total weight of said self-adhesive formulation of a composition (b 1) comprising at least 85% by weight based on the total weight of the composition (b 1) of a mixture of alkaline salts of C12-C18 monoalkyl esters of sulfuric acid;

- from 1% to 5% by weight based on the total weight of said self-adhesive solid formulation of a composition (b2) comprising from 8 to 12% by weight based on the total weight of the composition (b2) of a mixture of alkaline salts of C12-C18 monoalkyl esters of sulfuric acid dispersed in a mixture of C16-C18 fatty alcohols;

• between 5 % and 25 % by weight based on the total weight of said self-adhesive solid formulation of a nonionic surfactant (c) consisting of an aqueous dispersion comprising a mixture of C10-16 alkyl polyglucosides, in amounts between 40 and 60% by weight on the weight of said nonionic surfactant (c);

• a fragrance,

wherein the total water in said self-adhesive solid formulation is less than or equal to 15% by weight based on the total weight of said formulation.

In fact, by virtue of the significantly lower water content compared to other compositions known in the state of the art, the self-adhesive formulation object of the invention is more stable, with a lower tendency to give rise to a mixture of two phases and, Lastly, it shows a much less tendency to dry out if the toilet is not used for a certain period of time.

Another object of the present invention is an adhesive product in the form of a strip to be applied to the walls of sanitary ware comprising:

i) a layer of said strip comprising said self-adhesive solid formulation capable of adhering to the walls of the toilet and

ii) a non-adhesive water-soluble film, preferably containing polyvinyl alcohol, arranged on one surface of layer i), to allow the manual application of said product directly on the walls of the toilet.

Therefore, this type of product no longer requires the use of plastic containers and dispensers for its application and is therefore more environmentally friendly than products currently available on the market. Detailed description

For the purposes of the present invention, the term "comprising" is not intended to exclude the presence of other ingredients listed after said definition, while the term "consisting" or "constituted" is intended to exclude other ingredients not listed after such definition. .

For the purposes of the present invention, the term "self-adhesive" means a product that, by virtue of its composition, adheres by contact or pressure to the walls of sanitary objects.

For the purposes of the present invention, the term "sanitary article" means an apparatus consisting of a container, generally ceramic (there are also steel, glass and resin versions) intended for the elimination of excrement from physiological functions such as urination and defecation. . For the purposes of the present invention, preferably, but not limited to, said sanitary articles are the toilet (or WC) or the urinals.

In said formulation, the total water content is preferably less than 10% and more preferably between 5% and 8% by weight based on the total weight of said self-adhesive solid formulation.

In said self-adhesive solid formulation at least one salt of mixture (a) is preferably a mixture of sodium sulphate and sodium citrate.

According to a preferred embodiment, the sodium sulfate content in the mixture (a) is between 10% and 50%, preferably between 30% and 50%, more preferably it is 32.6% by weight based on the weight of said self-adhesive solid formulation, while sodium citrate is found in concentrations between 1% and 30%, is preferably 15% by weight of the total weight of the self-adhesive solid formulation.

According to another preferred embodiment, in said self-adhesive solid formulation the surfactant (b1) is contained in amounts between 15% and 35%, more preferably 25% by weight based on the total weight of said solid adhesive formulation.

Surfactant (b1) is the product with the trade name "Epicol LZN MB", the anionic surfactant comprises at least 85% by weight of the total weight of composition (b1) of a mixture of alkali metal salts, preferably sodium C12-C18 monoalkyl esters of sulfuric acid.

It should be noted that preferably in said self-adhesive solid formulation the anionic surfactant (b2) is 3.5% by weight of the total weight of the self-adhesive solid formulation. Said anionic surfactant (b2) is known by the trade name "Empiwax SKBP MB" and comprises between 8% and 12% by weight based on the total weight of composition (b2) of a mixture of alkali metal salts (preferably sodium) of C12-C18 monoalkyl esters of sulfuric acid dispersed in a mixture of C16-C18 fatty alcohols.

Also included in said formulation is the nonionic surfactant (c) known under the trade name "Glucopon 600 CS UP MB" preferably in a concentration of 14% by weight based on the total weight of said self-adhesive solid formulation.

In a preferred embodiment, said self-adhesive solid formulation preferably contains a fragrance in a concentration between 0.1% and 5% and more preferably 1% by weight of the total weight of said self-adhesive solid formulation.

Said fragrance may be the one known commercially under the name "MINT EUCALYPTUS NP 22129P".

According to a preferred embodiment, the formulation object of the present invention contains at least one plasticizer selected from the group consisting of: xanthan gum, rosin resin, waxy corn starch and mixtures thereof, preferably in concentrations between 0.1 % and 10% by weight based on the total weight of said self-adhesive solid formulation.

According to a more preferred embodiment, said self-adhesive formulation contains xanthan gum, rosin resin and waxy maize starch.

More preferably, xanthan gum is found in concentrations between 0.1% and 5%, preferably 2% by weight over the total weight of said self-adhesive solid formulation; the rosin resin is found in concentrations between 0.1% and 5%, preferably 2% of said self-adhesive solid formulation, and waxy corn starch in concentrations between 1 and 10%, preferably 5% in weight over the total weight of said self-adhesive solid formulation.

In said oral self-adhesive formulation, most of the components used were obtained by semi-synthetic processes from products of exclusively natural origin.

"Semi-synthetic processing processes" means chemical processes carried out on products of exclusively natural origin in order to induce additional functionalization of said products that would make them more suitable for the purposes of the present invention.

Based on this, commercial products comprising such a self-adhesive oral formulation therefore benefit from the “Ecocert Natural Detergents” certification ( https://www.ecocert.com/en/certification-detail/ecologicalhousehold-products-natdet) .

For example, sodium sulfate is a co-product of viscous fiber production from lignin, while the sodium citrate used is produced by fermentation from corn.

It should be noted that "viscous fiber" refers to a natural fiber of vegetable origin and in particular obtained by the so-called "viscous process" from wood lignin once said lignin has been separated from the cellulosic component.

In addition, both the anionic and nonionic surfactants present in said self-adhesive solid formulation come from chemical transesterification processes from modified palm oil.

In said self-adhesive solid formulation, the fragrance is also mainly composed of essential oils of natural origin.

It should be noted that in said self-adhesive solid formulation the plasticizers are also obtained from compounds of natural origin. For example, xanthan gum is produced by fermentation from a sugar generally selected from glucose, sucrose, or lactose. The rosin ester used is produced by esterification of rosin, which is a solid residue from the distillation of the resin of various conifers. Finally, waxy corn starch is produced from the corn itself.

Said self-adhesive solid formulation is also used in finished commercial products.

Another object of the present invention is an adhesive product in the form of a strip to be applied to the walls of sanitary ware comprising:

i) a layer of said strip comprising the self-adhesive solid formulation capable of adhering to the walls of the sanitary;

ii) a non-adhesive water-soluble film, preferably containing polyvinyl alcohol, arranged on one surface of layer i), to allow the manual application of said product directly on the walls of the toilet.

Preferably, on the surface opposite to where layer ii) is applied, a removable protective sheet is applied prior to the application of said product on the walls of the sanitary.

The non-adhesive water-soluble film ii), which preferably contains polyvinyl alcohol (or PVA), prevents direct contact of said self-adhesive formulation object of the invention with the hands of the user. According to a particularly preferred solution, said non-adhesive water-soluble film layer is provided with a protrusion or "flap" to facilitate the manual application of said additional product object of the present invention. By way of non-limiting illustration, the following examples are given.

1. E m l f r m l i n

2. Example of stability and performance of the finished commercial product

2.1 Example of product stability

Stability tests were carried out on the finished commercial product to verify that its physicochemical conditions do not change over time. The internal procedure used to perform a stability test includes the following conditions:

• room temperature, natural light, 3 years

• 40 °C, 3 months (accelerated condition corresponding to 3 years at room temperature)

• 4 °C, 3 months (accelerated condition corresponding to 3 years at room temperature) The stability at the conditions indicated above (in progress for room temperature and finished for 40 °C and 4 °C) did not present anomalies of the product, thus demonstrating correctly maintaining the designed formula.

2.2 Example of action

The realization of the finished commercial product was carried out in order to verify the foaming capacity of the product, the duration in terms of discharges and the consumption of said product over time. The internal procedure used to perform a performance test includes the following conditions:

• Toilet (or WC), French model (Villeroy & Boch, Voltablanc)

• Schedule set at 17 downloads per day

• 9 liters (L) of water for each discharge

• Water hardness equal to 35° THF

The performance of said finished commercial product under the aforementioned conditions showed an average duration of 140 downloads. The foaming capacity is in line with a classic toilet (or WC) product: the foam reaches its peak in the central phase of the product's life, decreasing as it reaches the end of life.

Claims (14)

1. Solid self-adhesive formulation for the hygiene and fragrance of sanitary articles comprising: • between 11% and 80% by weight based on the total weight of said self-adhesive solid formulation of a mixture (a) of at least one alkaline salt of an inorganic and/or organic acid; • an anionic surfactant (b) comprising: - between 5 and 45% by weight of the total weight of that self-adhesive solid formulation of a composition (b1) comprising at least 85% by weight of the total weight of the composition (b1) of a mixture of alkaline salts of mono C12-C18 alkyl esters of sulfuric acid; - between 1% and 5% by weight of the total weight of that self-adhesive solid formulation of a composition (b2) comprising between 8 and 12% by weight of the total weight of the composition (b2) of a mixture of salts alkalis of C12-C18 monoalkyl esters of sulfuric acid dispersed in a mixture of C16-C18 fatty alcohols; • between 5% and 25% by weight based on the total weight of said self-adhesive solid formulation of a nonionic surfactant (c) consisting of an aqueous dispersion comprising a mixture of C10-16 alkyl polyglucosides, in quantities between 40 and 60 % by weight on the total weight of said nonionic surfactant (c); • a fragrance, wherein the total amount of water in said self-adhesive solid formulation is less than or equal to 15% by weight based on the total weight of said self-adhesive solid formulation. 2. Self-adhesive solid formulation according to claim 1, in which the total amount of water is less than 10%, preferably between 5 and 8% by weight of the total weight of said self-adhesive solid formulation. Solid self-adhesive formulation according to claim 1 or 2, in which the salts of mixture (a) are a mixture of sodium sulphate and sodium citrate. 4. Self-adhesive solid formulation according to claim 3, wherein the sodium sulfate contained in (a) constitutes between 10 and 50%, preferably between 30 and 50%, more preferably 32.6% by weight on By weight of said self-adhesive solid formulation, sodium citrate is present in concentrations between 1 and 30%, preferably 15% by weight of the total weight of said self-adhesive solid formulation. 5. Solid self-adhesive formulation according to any one of claims 1 to 4, in which the surfactant (b1) is contained in the solid self-adhesive formulation in amounts between 15 and 35%, preferably 25% by weight based on the total weight of that self-adhesive solid formulation. 6. Solid self-adhesive formulation according to any one of claims 1 to 5, in which the concentration of anionic surfactant (b2) is 3.5% by weight based on the total weight of said solid self-adhesive formulation. 7. Self-adhesive solid formulation according to any one of claims 1 to 6, in which the concentration of nonionic surfactant (c) is 14% by weight based on the total weight of said self-adhesive solid formulation. 8. Self-adhesive solid formulation according to any one of claims 1 to 7, in which the fragrance concentration is between 0.1 and 5%, preferably 1% by weight of the total weight of said self-adhesive solid formulation. 9. Self-adhesive solid formulation according to any one of claims 1 to 8, containing at least one plasticizer selected from the group consisting of: xanthan gum, rosin resin, waxy corn starch and mixtures thereof, preferably in concentrations comprised between 0.1 and 10% by weight over the total weight of the self-adhesive solid formulation. 10. Self-adhesive solid formulation according to claim 9, containing xanthan gum, rosin resin and waxy maize starch. 11. Self-adhesive solid formulation according to claim 10, containing xanthan gum in concentrations between 0.1 and 5%, preferably 2% by weight over the total weight of said self-adhesive solid formulation; rosin resin between 0.1 and 5%, preferably 2%, and waxy corn starch in concentrations between 1 and 10%, preferably 5% by weight over the total weight of said self-adhesive solid formulation. 12. Adhesive product in the form of a strip to be applied to the walls of toilets that includes: i) a layer of said strip comprising the self-adhesive solid formulation according to any one of claims 1 to 11 capable of adhering to the walls of the sanitary; ii) a non-adhesive water-soluble film, preferably containing polyvinyl alcohol, placed on one surface of layer (i), to allow manual application of this product directly on the walls of sanitary ware. 13. Adhesive product according to claim 12, in which on the surface opposite to the surface on which layer (ii) is applied, a protective sheet is applied that is removable before applying this product to the walls of the sanitary . 14. Adhesive product according to any one of claims 12 or 13, wherein said non-adhesive film layer (ii) is provided with a protrusion or "flap" to facilitate its application.