WO2021165325A1

WO2021165325A1 - Environmentally-friendly composition for removing a marking, rubber, adhesive or resin on a support

Info

Publication number: WO2021165325A1
Application number: PCT/EP2021/053896
Authority: WO
Inventors: Philippe Lutringer; Thierry Robin
Original assignee: Rl Innovation
Priority date: 2020-02-20
Filing date: 2021-02-17
Publication date: 2021-08-26
Also published as: FR3107531B1; FR3107531A1

Abstract

The present invention relates to an environmentally-friendly liquid or gel composition for removing graffiti, graffiti drawings, chewing gums, adhesives, resins and road markings on all porous or non-porous supports. Said composition is in particular non-flammable and biodegradable.

Description

Title of the invention: Ecological composition for the removal of a marking, gum, glue or resin on a support

Technical field of the invention

The invention relates to an ecological composition, biodegradable and non-flammable, liquid or gel and its use to remove a marking on a surface, a graffiti, the spectrum of a graffiti, chewing gum {"chewing gum »In English terminology), glue, or even resin on all porous or non-porous supports. The invention relates in particular to the use of the composition for removing road markings from all coatings.

Prior art

[0002] Cleaning compositions for removing graffiti are already known. These compositions are generally in the form of liquids or gels composed of a mixture of chlorinated and carbonaceous solvents such as gasolines C, E, F and A to which a polar solvent such as ethanol is added. To transform such a liquid composition into a gel, a gelling agent such as finely divided silicon dioxide and optionally a miscibilizing agent such as monomethyl ether glycol ether are added.

These liquids and gels generally give good results but they do not eliminate the spectra of graffiti on porous surfaces, moreover these solvent-based products have many drawbacks. Indeed, they are most of the time flammable, toxic, and they must be, after use, neutralized with water and in fact these compositions are very often prohibited for use by local communities.

Another technique for removing graffiti consists of erasing the support (that is to say sanding) and then sanding the surface to eliminate the spectra of graffiti remaining in the porosity of the support, but such a method results in a decrease in the thickness of the support and moreover levels the surface. [0005] The extraction of chewing gums, glues and resins is carried out mainly using a scraper which has the major drawback of leaving residues on the supports and more simply of damaging them.

[0006] Another method is the use of cryogenic bombs (cold bombs) which harden the chewing gum on the support. It is then sufficient to break the hardened chewing gum into small pieces, but the major drawback of this system, especially on rugs and carpets, is that the chewing gum, being hardened in the fibers, deteriorates them when pulled up.

[0007] Other products are known in the form of liquids or gels for the removal of chewing gums, glues, resins, but once again these products are most of the time flammable, solvent-based and cannot therefore be used in isolation and they are very often prohibited because they are harmful.

Another technique currently used for the removal of chewing gum on stony and porous soils (marble, granite, concrete, etc.) consists of sanding, scraping or hydro-erasing the support at high power but a such a method leads to a decrease in the thickness of the support and more hollow the surface of the latter.

[0009] As a system for removing paint from road markings, shot peening is currently known, which consists in projecting shot by centrifugal process with recycling and simultaneous suction of waste and collection of shot not recycled by electromagnetic system, but its effectiveness remains questionable.

Another alternative system to shot peening for removing road marking paints is milling, but this system has the disadvantage of deterioration of the support.

Another system is planing, carried out by means of abrasive rollers, the hardness of which varies depending on the surface to be treated, but this system also alters the support

Another system for removing road markings is sanding which is less aggressive than previous processes but not very effective either.

[0013] Another solution used to eliminate road markings is hydro-projection, which consists in projecting pure water at ultra high pressure in order to strip road markings. This concept works but its drawback major is the very important cost entailed by the transport and the use of the material on site.

Presentation of the invention

The present invention therefore aims at a composition to overcome the aforementioned drawbacks. To this end, the present invention is aimed at a liquid composition comprising:

- 10% to 30% by volume of di propylene glycol dimethyl ether,

- 10% to 20% by volume of dimethyl sulfoxide,

- 10% to 30% by volume of dibasic ester solvent,

- 1% to 10% by volume of methoxy propoxy propanol,

- 1% to 5% by volume of terpenes,

- 3% to 5% by volume of ethyl lactate, and

- 1% to 10% by volume of water.

The present composition has the advantage of allowing easy removal of road markings, in particular road markings paints, graffiti, graffiti spectra generally comprising pigments or inks, on all smooth substrates (metals, plastics , fabrics, glasses, polymethyl methacrylate, etc.) but also on all stony and / or porous supports without leaving residual pigmentation on said supports. The composition according to the present invention also advantageously makes it possible to remove the chewing gum, the resin and the glue from all smooth, stony and / or porous supports without leaving residues on the supports.

[0016] The composition according to the invention is particularly advantageous owing to the fact that it is non-flammable, non-toxic, biodegradable and that it does not contain any carbon-based or chlorinated solvent. The composition can therefore be used advantageously in all places and in particular in a closed environment.

The composition appears to be remarkably advantageous due to the fact that it causes a chemical reaction on a porous support where it is applied (for example a road or a concrete or plaster wall) which makes it possible to penetrate the micropores of said support and to drive out pigments and inks from road markings and graffiti paints on the support but also all chewing gum, glue and resin residues. In particular embodiments, the invention also meets the following characteristics, implemented separately or in each of their technically operative combinations.

In particular embodiments of the invention, the composition is in the form of a gel. According to a particular embodiment, the composition in gel form comprises silicon dioxide. By adding finely divided silicon dioxide to the liquid composition, the gel form for the composition is obtained.

[0020] In particular embodiments of the invention, the composition is non-flammable, biodegradable and environmentally friendly.

[0021] According to another aspect, the present invention relates to the use of the composition which is the subject of the present invention for removing graffiti or a spectrum of graffiti on a smooth support.

[0022] According to another aspect, the present invention relates to the use of the composition which is the subject of the present invention for removing a graffiti or a spectrum of graffiti on a porous or non-porous support.

[0023] According to another aspect, the present invention relates to the use of the composition object of the present invention for removing chewing gum, glue, or resin on a porous or non-porous support.

[0024] According to another aspect, the present invention relates to the use of the composition object of the present invention for removing chewing gum, glue, or resin on a smooth support.

[0025] According to another aspect, the present invention relates to the use of the composition which is the subject of the present invention for removing paints from road markings.

[0026] According to a particular embodiment, the composition is used to remove paint from road markings on an asphalt, concrete, asphalt or other support commonly used in the manufacture of roads.

According to another aspect, the present invention relates to a method of removing a graffiti, a spectrum of graffiti, a road marking, a glue, a resin or chewing gum on a support. , said removal process comprising a step of spraying the composition which is the subject of the present invention on said support and a reaction step during which the composition sprayed and left on the support for a period of at least 30 seconds, preferably at least 1 minute, preferably at least 3 minutes, preferably at least 5 minutes, of preferably at least 10 minutes, preferably at least 15 minutes, preferably at least 20 minutes, preferably at least 25 minutes, preferably at least 30 minutes, preferably between 30 minutes and 1 hour, more preferably for a period of 30 minutes.

In a particular embodiment of the present invention, the method comprises a step of rinsing the support on which the composition has been sprayed. Said rinsing step is preferably carried out with water, more preferably by water jet, more preferably by high pressure water jet.

Description of the embodiments

The invention will be better understood on reading the following description, given by way of non-limiting example.

COMPARATIVE EXAMPLES

[0031] Example 1

[0032] Inscriptions are placed on a coarse cement wall with a very rough and porous surface using black, blue, red and green paints. A gel which is substantially composed of A, E, C and F essences, finely divided silicon dioxide and which comprises ethanol in an amount of 10% by volume is sprayed onto this surface.

The gel is left to act on the surface for 30 minutes and then we rinse the wall with high pressure water. The gel and inks are removed from the wall but not completely, in fact there are still spectra of dye on the cement wall.

Is deposited on the same cement wall the same inscriptions using the same color paints. The composition object of the present invention in gel comprising 10% to 30% by volume of di propylene glycol dimethyl ether, 10% to 20% by volume of dimethyl sulfoxide, 10% to 30% by volume of dibasic ester solvent, 1% to 10% by volume of methoxy propoxy propanol, 1% to 5% by volume of terpenes, 3% to 5% by volume of ethyl lactate, 1% to 10% by volume of water and silicon dioxide. It is left to act for 30 minutes and it is rinsed by spraying with water under high pressure. There is no longer any trace of paint or specter of paint on the wall thus treated. [0035] Example 2

Chewing gums are deposited on a granite floor and a gel is sprayed on these chewing gums substantially composed of essences A, C, E and F, of finely divided silicon dioxide in order to obtain a gel and comprising 10% ethanol. We leave this gel on for 30 minutes and then rinse the surface with high pressure water. The chewing gums have disappeared but not completely because we see that chewing gum residues persist in the porosity of the surface.

Chewing gum on which we spray the composition object of the present invention also used in Example 1 above, in gel form, is deposited on the same granite floor. It is left to act for 30 minutes and after rinsing with high pressure water we can see that all the chewing gum has disappeared and that there is no chewing gum residue on the support.

[0038] Example 3

Is deposited on the road markings of an asphalt coating a gel which is substantially composed of essences A, E, C and F, of finely divided silicon dioxide and comprising ethanol in an amount of 10% in volume.

The gel is left to act for 30 minutes and then we rinse the marking with water under high pressure. We can see that no marking has disappeared indeed the composition has had no effect on road marking.

The composition object of the present invention also used in Examples 1 and 2 above, in gel form, is then deposited on the same road marking of an asphalt coating. We leave it on for 30 minutes and rinse the surface with high pressure water. We can see that all the road markings have disappeared.

Claims

Claim 1. Liquid composition characterized in that it comprises:

- 10% to 30% by volume of di propylene glycol dimethyl ether,

- 10% to 20% by volume of dimethyl sulfoxide,

- 10% to 30% by volume of dibasic ester solvent,

- 1% to 10% by volume of methoxy propoxy propanol,

- 1% to 5% by volume of terpenes,

- 3% to 5% by volume of ethyl lactate, and

- 1% to 10% by volume of water.

Claim 2. A composition according to claim 1, said composition being in the form of a gel.

Claim 3. A composition according to claim 2 comprising silicon dioxide.

Claim 4. A composition according to any one of claims 1 to 3, said composition being non-flammable, biodegradable and environmentally friendly.

Claim 5. Use of the composition according to any one of claims 1 to 4, for removing graffiti or a spectrum of graffiti from a smooth support.

Claim 6. Use of the composition according to any one of claims 1 to 4, for removing graffiti or a spectrum of graffiti on a porous or non-porous support.

Claim 7. Use of the composition according to any one of claims 1 to 4, for removing chewing gum, glue, or resin on a porous or non-porous support. Claim 8. Use of the composition according to any one of claims 1 to 4, for removing chewing gum, glue, or resin on a smooth support.

Claim 9. Use of the composition according to any one of claims 1 to 4, for removing paints from road markings.

Claim 10. Use of the composition of claim 9, wherein the road marking paints are on an asphalt, concrete, asphalt or other substrate commonly used in the manufacture of roads.

Claim 11. A method of removing a graffiti, a spectrum of graffiti, a road marking, an adhesive, a resin or chewing gum on a support, said removal method comprising a step of spraying of the composition according to any one of claims 1 to 4 on said support and a reaction step during which the composition sprayed and left on the support for a period of at least 30 seconds, preferably at least 1 minute, of preferably at least 3 minutes, preferably at least 5 minutes, preferably at least 10 minutes, preferably at least 15 minutes, preferably at least 20 minutes, preferably at least 25 minutes, preferably at least 30 minutes, preferably between 30 minutes and 1 hour, more preferably for a period of 30 minutes.

Claim 12. The method of claim 11 comprising a step of rinsing the support on which the composition has been sprayed.