FR2908419A1 - Perfumed resin, useful to prepare products to improve atmospheric air, comprises combination of absorbing resin support and complex aromatic composition having natural essential oils to clean, purify and improve the atmospheric air quality - Google Patents

Abstract

Perfumed resin allowing regular diffusion of aromatic components into gas phase particularly enriched with natural essential oils, to prepare a products to improve atmospheric air, usable in all enclosed places e.g. public/ private places, and transports e.g. motor vehicles, comprises a combination of an absorbing resin support able to regularly release the volatile components in vapor form, and a complex aromatic composition containing natural essential oils for cleaning, purifying and improving the quality of atmospheric air. Perfumed resin allowing regular diffusion of aromatic components into gas phase particularly enriched with natural essential oils, for the preparation of products for improving atmospheric air, usable in all enclosed places i.e. public or private places, homes, offices, shops, hotels or other, as well as in transports, preferably motor vehicles, comprises a combination of an absorbing resin support able to regularly release the volatile components in the vapor form, where the combination is impregnated, without conducting separation according to their respective volatility, and a complex aromatic composition containing natural essential oils for cleaning, purifying and improving the quality of atmospheric air. An independent claim is included for a preparation of perfumed resin comprising implementation of a new aromatic component, which is previously carried out by analyzing and observing the behavior of each component during impregnation so that it corresponds to the best adapted operating mode and systematically deducting the performance of the final product.

Description

The subject of the present invention is a scented resin allowing the

  regular diffusion in the gas phase of aromatic components in particular enriched with natural essential oils, as well as the process for producing this resin. It concerns the industrial and commercial field of manufacturing and marketing of products intended for the improvement of ambient air, usable in all enclosed areas, whether public or private, dwellings, offices, shops, hotels or others, as well as in means of transport and particularly in motor vehicles. The invention consists in fact of an improvement of the patent N FR 2 743 566, filed on 16/01/1996 by the applicant and the Company "ATOCHEM" (which has since abandoned its share), and concerning a scented resin comprising a polyetheresteramide-type polymer resin containing the complex volatile substances to be released, as well as objects shaped from said resin, their method of preparation and their use for ambient perfuming. The relevance of the novelty of the claims of this patent and the possibilities of industrial application appeared unquestionably 10 years ago at the time of this first filing. However, at the time, several parameters were not sufficiently taken into account because they did not yet appear as major preoccupations: - The safety of the user during the diffusion of volatile substances, particularly in the applications of the perfume of the atmosphere and the comfort of the atmosphere. - The medium or long term effects on the ecological environment. Moreover the interest of the surprising behavior of the various components of a complex perfume base particularly of cosmetic quality, have not been sufficiently explained in the patent N FR 2 746 566 nor the innovative application opportunities. . It has been unquestionably shown in this patent that complex perfuming bases having different volatility components when used to impregnate a resin according to the process described were then released on a regular basis without causing the separation phenomenon. according to their respective volatility. It is found that novel combinations of complex volatile substances, in particular enriched with natural essential oils, can give results that have never been demonstrated or obtained, even partially in the prior art. Indeed, the perfumer knows that to carry out a sophisticated perfuming of the environment he will have to use comparable raw materials and formulations similar to those of body perfumes. It is also highly desirable that the formulation of a product to be breathed in rather large amounts has a level of safety comparable to that of body perfumes in contact with the skin. On the other hand, the attitude of the consumer clearly shows that he expects from his room fragrance a benefit comparable to his habits in terms of body perfume, comparable to the scents of nature that the perfumer has engineered himself. to restore as well in the perfumes for the toilet as in the food aromas. There is therefore a need for an article to release complex scented compositions in a regular manner without leading to the separation of the different constituents and therefore without significant degradation of their qualities over time. 30 By the way. the need to improve the quality of ambient air, in particular to reduce the risk of microbial contamination via air and ventilation systems in public places, offices, hotels, hospitals, is a problem. The air treatment systems of buildings and vehicles are home to many germs, bacteria and fungi that are then carried 2908419 throughout the ventilated enclosure. The growing number of cases of Legionnaires' disease in France has helped to rekindle this fear of the invisible disease whose contagion and treatment can not be controlled. Some plant extracts, especially essential oils, are used for their strong anti-microbial, fungicidal and virucidal actions. Indeed, many of these natural products have an adequate chemical composition and have the advantage of being significantly less toxic than other synthetic disinfectants for a comparable result. Their chemical composition, their extremely volatile nature adds to them a pleasant fragrant character, make them agents of choice for the treatment of air and ventilation systems. Some of these oils have remarkable anti-bacterial properties on the pathogens that are usually found in ventilation systems.

  Recent research has irrefutably demonstrated the antimicrobial activity of the gas phase of natural essential oils whose properties are not yet recognized in the scientific and medical worlds. Of particular note is the thesis of Marie-Cécile PIBIRI of the Swiss Federal Institute of Technology in Lausanne, Switzerland, which clearly shows that the use of natural essential oils in the gas phase is a solution for the future to clean up the air and ventilation systems. The great interest of the use of essential oils lies in an effective and natural response to people's expectations of public places 25 with regard to: - The collective microbiological safety - The protection of individual health. The use of essential oils can be an environmentally friendly way to address the problems of contamination of ventilation systems. Microcomic pollution, when airborne, is in the form of aerosols consisting of living or inert particles, solid or liquid, suspended in air of sizes generally between 0.5 and 30 g / cm. A direct consequence of the increase in the number of microorganisms in an air treatment system is an increase in the intensity of the released odors. None of the documents of the prior art describes a scented resin for the diffusion of complex scented compositions associated with substances for improving the ambient air according to the present invention, nor does it suggest how to obtain a resin adapted for this purpose. . The present improvement of the patent N FR 2 743 566 describes a set of means for bringing well-being, comfort, olfactory atmosphere (fragrances and aromas) pleasant in the atmosphere whatever the place or the environment. The essential oils diffused exclusively in vapor phase being presented like a solution of future for cleaning up the air and the ventilation system. The invention consists of novel products combining an absorbent carrier resin for regularly releasing the volatile components from which it is impregnated without causing separation phenomena according to their respective volatility, and a complex perfume base added with one or 20 several complementary components, including natural essential oils for sanitizing, purifying and improving the quality of the ambient air, or any other deodorant, insecticidal, bactericidal, fungicidal, relaxing or euphoric component, by first checking components by components, and observing each behavior during the impregnation so that it corresponds to the most appropriate operating mode and systematically deduce the performance of the final product. The invention will be better understood and other objects, details and advantages thereof will become more clearly apparent in light of the following explanatory description. ~. The term aromatic component as used in the context of the present invention encompasses all the volatile odor components that can be used in the formulation, as well as any volatile ingredient capable of participating or improving the quality of the the air and the feeling of well-being and comfort in the environment. The invention is based on the combination of different volatile substances to obtain a complex perfume base, to allow high concentrations greater than 38% by weight of active substances relative to the total weight of impregnated resin, to bring comfort, well-being and perfuming the environment in a secure manner in accordance with the standards and practices of the large French perfumery and cosmetology, to allow this formulation to evolve with new standards defining consumer safety and respect for the environment . The support resin will preferably consist of the polyether block amide resin (PEEA) described in patent FR FR 2,743,566 (trade name "PEBAX") corresponding to the formula: OH-C-PA-C-O-PE -â In which PA represents the polyamide segment and PE represents the polyether segment and n is an integer representing the distribution of the repeating units. Such a resin does not behave as a chromatographic separation support leading to a separate diffusion of the various volatile components it contains unexpectedly, all the volatile constituents are released constantly without any separation phenomena and, therefore, without any noticeable degradation of the qualities of the scented composition.

  The support may, however, consist of any other resin known today to those skilled in the art or which could be developed in the future and exhibiting a similar behavior to accommodate complex volatile perfume mixtures with this embodiment. impregnation associated with ethyl alcohol. The aromatic component, in addition to the perfuming elements, will comprise volatile additional principles, in particular essential oils having bactericidal, virucidal, fungicidal, insecticidal, deodorant, relaxing and / or euphoric properties, intended to ensure the well-being of the body. to be people who breathe it. The composition can be enriched with one or the other 100% natural essential oils known for their beneficial effects in the know-how of herbal medicine as it was recognized in France as a separate medicine in 1986.

For example, it has been clinically demonstrated that the bactericidal action of the vapors of the mountain savory essential oil is comparable to that of formaldehyde used in hospital settings with a much lower concentration (790 against 1900 ppm). . Since pharmacology has established the appropriate dosages, the dosages on those selected for pharmaceutical use should be carefully monitored and aligned to avoid their irritancy on the skin or the mucous membranes, or when the substances diffused in the skin will be inhaled. 'atmosphere. Three examples of promise offered by herbal medicine: 1) Principle promoting calm, balance, serenity and vigilance using the following essential oils: - Orange tree: used since always to calm and relax the children. - Tranquilizing chamomile, calm nerves, balancing, de-stressing. 2) Principle promoting tonus-energizing energy and vitality, thanks to essential oils: -Mint: toning, invigorating freshness. Promotes digestion -Basilic keeps fatigue, tonic very effective. 30 3) Principle promoting relaxation-relaxation, regeneration and stimulation thanks to essential oils: - Lavender soothing, purifying, reduces nervousness, reduces anxiety. - Rosemary: fight against general fatigue. regenerating, promotes 1.5 digestion. For plant extracts that do not exist in the form of essential oils, infusions will be used, preferably in pure agricultural ethyl alcohol or mixed with water, according to the known methods. or simply in water for small amounts.

The deodorant and fungicidal effect, if desired, will be obtained by the addition of undecylenic acid or its derivatives, preferably in the form of ethyl undecylenate at a dosage of 0.1 to 10% by weight. total volatile substances and active ingredients.

This dosage will be meticulously performed by the perfumer so that his association does not produce a parasitic or antinomic effect with the perfuming elements, but on the contrary, he participates in the creation of the olfactory note. It will also be ensured that its dosage keeps the assets very safe for use, both in terms of health and the ecological environment. In order to improve the presentation of the product, often distributed in transparent packaging; the perfume base can contain one or more food grade dyes that both enhance the product and give it a 2G color code to recognize and buy the fragrance. In addition, the active product will advantageously contain a protective and antioxidant element such as "UVINUL" (type A PLUS B in particular) from BASF, which can be used up to concentrations of 10%, notably ensuring the preservation of dyes, thanks to UV protection.

This same "UVINUL" will also intervene to protect "PEBAX" (R) against weathering and aging. The final complex composition constituting the active product must never contain any solvent that may be suspected of being carcinogenic, endocrine disrupting or other, such as could be currently ethyl phthalate, however, widely used in the manufacture of fragrant RF bases and ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ current of ethyl perfume alcohol, for example in France: 5 g / liter to make an alcohol especially of agricultural origin unfit for mouth consumption, and 11 g / liter in the US to obtain the standard 35 SD Alcohol 39 C In France, for example, 5 g / liter is used to make an alcohol, particularly of agricultural origin, unsuitable for mouth consumption, and 11 g / liter in the USA to obtain the SD Alcohol 39 C standard. This composition will not include any alcohol. allergens or i as described in the different Directives, including the list of allergens in the most recent European Community Directives, and in particular Directive 2003/15 / EC of the European Parliament and of the Council of February 27, 2003 identifying 26 fragrance substances likely to cause allergic contact reactions in persons who are sensitive to it. Volatile substances must not contain any petroleum or other solvents that are not recommended for cosmetic use, such as benzene, BHT or others, which are already strongly discouraged by users, among others by consumer organizations.

In other words, the only safe solvent, having historically and for a long time proved its perfect accounting with all the perfume or food essences, is ethyl alcohol, preferably of agricultural origin when it is desired to highlight the naturalness of a formulation. However, care should be taken in formulating an alcohol-based product to obtain a PEBAX-based perfuming resin whose flash point is greater than 21 ° C. for the product marketed to the final consumer. the flammability of the other components, a presence of ethyl alcohol of 5 to 40% of the total weight of the active liquid product will provide an undeniable improvement of the olfactory properties, effect always sought and obtained by the presence of alcohol in the body perfumes of In the case of perfume compositions enriched with natural essential oils, FRA (International Fragrance Association) and RIFM (Research Institute for Fragrance Material) recommended constituents are preferably selected at very high concentrations. , preferably up to 20%, while remaining consistent with their use in perfumes and body cosmetics. This requirement is based on a basic safety rationale that a user should not be made to breathe an ingredient not recommended for contact with the skin. The present invention also includes the requirement for the formulator, in the future, to evolve his assays as the experiment will reveal new risks, or advocate new standards of use. The scrupulous follow-up of this methodology based on the principle and the discovery demonstrated in the patent FR FR 2 743 566 that what is observed at the impregnation of the "PEBAX" will reproduce practically identical to the desorption, will have for the decisive advantage that the volatile substances impregnated at very high concentrations, up to 50% and even beyond the final weight in the scented "PEBAX", can never come out or exude in the liquid phase, which may have disastrous consequences, but exclusively in the form of vapor in the vapor phase, whatever the conditions of use encountered, for example, exposure to the sun behind an automobile windshield which can raise the temperature to 60.degree. / 70 C followed by very low temperatures that can reach in an automobile -20 to -30 C. This advantage, now known only with the particular grade of "PEBAX" used in the present invent ion, will bring a major benefit by virtually eliminating the risk of stain or deterioration of fragile materials, which is an obligation to respect the decor, materials and amenities of a car today, but also any other similar situations that will be found at home, in the office or elsewhere.

25 more. as Marie-Cécile PIBIRI pointed out in her thesis, the essential oils incorporated in the formulations, can be an ecological way to answer the problem of contamination of the ventilation systems, to participate in the suppression of the undesirable pollution accompanied by emissions For the implementation of each new aromatic component, the behavior of each constituent during the impregnation must be analyzed and observed in order to correspond to the most appropriate and systematic procedure for its use. deduce the performance of the final product. Indeed, the component that enters the slowest will slow the others at the inlet and the outlet, so the observation at the impregnation, constituting constituent, will allow the formulator to pre-determine the result obtained desorption -dissemination of volatile substances.

On the contrary, we also see that the substances that go wrong will delay or even prevent the impregnation of others, and will affect the diffusion of other positive assets during the broadcast. It is therefore also essential to have previously observed all these negative substances precisely or to slow the diffusion of the most volatile, which the perfumer naturally does when he creates a perfume of high quality, or to dose them with caution when they show a low capacity to enter the "PEBAX", such as for example MPG (Monopropylene Glycol) or DPG (Dipropylene Glycol). 1: 5 The solvents that can be qualified as a behavior in the average search can be for example PE (ethyl phthalate) or DPM (Dipropylene Glycol monoethyl ether). The novelty of the scented resin described is based on five essential characteristics, namely: 1) complex aromatic composition in alcoholic solution associating scents, aromas or flavors in a harmonious and homogeneous composition of components of different volatilities, conserving itself in time and s improvement by maceration in the impregnating resin ("PEBAX") in which it is stored in large quantities. all the components being distributed regularly over time. 2) All the components constituting the complex aromatic base comply with the standards and uses of cosmetics and in particular the requirements of the products in contact with the skin, through the exclusive use of perfume components that comply with IFRA standards and of the RIFM 3) Active compound product: a / fragrant complex compositions, ie all noble bases and all natural essential oils and their complements: active with para-medical or other properties, 2908419 -11-b / ethyl alcohol preferably of agricultural origin in order to promote the conservation and the improvement over time of the odoriferous compositions by the maceration in the impregnating resin, c / adjuvants or assemblies of adjuvants intended to regulate the absorption / desorption , in the strict framework of the recommended dosages recognized for the cosmetic use and assembled in a cocktail of heavier products such as DPG (Dipropylene Glycol) retarding the absorption and systematically desorption and more volatile ingredients such as DPM (Dipropylene Glycol Methyl Ether), 10 d / volatile deodorant, bactericidal, fungicidal principles such as C.11. E! dyes, f / UV protection. The proportion by weight of the components of the active product relative to the weight of the finished product of: 15 - 10 to 40% perfume base complex - 5 to 25% of ethyl alcohol of agricultural origin - 3 to 20% of volatile solvents type DPM (Dipropylene Glycol Monoethyl Ether) - 3 to 20% of moderately volatile solvents such as Isopropyl Myristate 20 -1 to 20% of low volatility solvents such as DPG (Dipropylene Glycol) + dyes and / or deodorant and / or anti UV 4) Impregnation of the resin in a smooth-walled bezel (liquid product absorption by PEBAX beads) for 45 to 60 minutes followed by a rest period of several hours during which a time delay will make a few turns to the bezel at intervals, so that the impregnation is progressive and total, the perfuming pearls never take in mass at the time of the impregnation and no component is restored in the liquid phase during the desorption, but to still in the vapor phase. This methodology makes it possible to control the risk of particle formation by abrasion of PEBAX which is unavoidable with other processes in order to achieve the desired optimal impregnation rates (PEBAXl active product of the order of 50/50 by weight. choice of solvents mentioned here compatible with the PEBAX is fundamental, it is not exhaustive any present or future compatible products may be used Non-use of solvents dangerous for health or the environment, heavy solvents or support may be used in the form of perfume beads or be transformed by any means known to the plastic industry: injection, extrusion, blowing, etc. Other elements of thermoformed plastics of any kind may be made either by adding perfume resin obtained according to the production methods described above in the form of a master batch ("master batch" technique) in all other materials The invention also relates to embodiments of said plastics material, either formed directly from said resin, or by making by any means a piece of PEBAX or similar resin and impregnating thereafter the complex aromatic composition. Example of a simplified formulation of the product according to the invention (by weight): - Colored active product: 35% - Standard PEBAX ATO MX 1717: 60% 15 - Denatured alcohol Perfumery density 0.8: 1.9% - Isopropyl myristate density 0.85: 3% -Uvinul A + B BASF / LASERON: 0.1% The active product being itself composed of: - Scented base: 75%) 20 - Denatured alcohol perfumery: 20.4% -Undecylenate d Ethyl Cl 1: 3.6% - Color: 1% The positioning of the various constitutive elements gives the object of the invention a maximum of useful effects which had not, so far, been obtained by similar products.

Claims (9)

  1. . Scented resin allowing the regular diffusion in gas phase of aromatic components especially enriched with natural essential oils, intended for the realization of products allowing the improvement of the ambient air, usable in all closed places, whether public or private , homes, offices, shops, hotels or others, as well as in means of transport and particularly in motor vehicles, characterized by the combination, on the one hand, of an absorbent support resin capable of releasing on a regular basis the volatile components of which it is impregnated exclusively in the form of steam, without causing separation phenomenon according to their respective volatility and, secondly, a complex aromatic composition containing natural essential oils for sanitizing, purifying and improve the quality of the ambient air. 2. Scented resin according to claim 1, characterized in that it is supplemented with at least one complementary principle such as deodorant, insecticide, bactericidal, virucidal, relaxing or euphoric fungicide. 3. Scented resin according to any one of the preceding claims, characterized in that the proportion of active substances is greater by weight than 38% of the total weight of impregnated resin. 4. Scented resin according to any one of the preceding claims, characterized in that the carrier resin consists of polyether block amide resin (PEEA) (trade name "PEBAX" (R)) corresponding to the formula: OH-C-PA Where PA represents the polyamide segment and PE represents the polyether segment and n is an integer representing the distribution of the repeating units. ## STR1 ## 5. Scented resin according to any one of the preceding claims, characterized in that the aromatic composition contains at least one essential oil promoting calmness, balance, serenity and alertness, such as essential oil of orange tree or chamomile. 6. Scented resin according to any one of claims 4 10 and 5, characterized in that the aromatic composition contains at least one essential oil promoting tonus-energizing, energy and vitality, such as mint essential oil or basil. 7. Scented resin according to any one of claims 4 to 6, characterized in that the aromatic composition contains at least one essential oil promoting relaxation-soothing, regeneration and stimulation, such as lavender essential oil or rosemary. 8. Scented resin according to any one of the preceding claims, characterized in that the aromatic composition contains plant extracts in the form of an infusion in pure agricultural ethyl alcohol, or in agricultural ethyl alcohol mixed with some water. 9. Scented resin according to any one of the preceding claims, characterized in that the composition contains an equally fungicidal deodorant consisting of undecylenic acid in the form of ethyl undecylenate at a dosage of 0.1 to 10% of the total weight of volatile substances and active ingredients. 10. Scented resin according to any one of the preceding claims, characterized in that one or more food grade dyes are added to the aromatic composition in order to ensure recovery of the product and give it a color code. to recognize and buy the perfume. 2908419 -15- 11. Scented resin according to any one of the preceding claims, characterized in that a protective and antioxidant element such as "UVINUL" type "A PLUS B" from the BASF company is added to the aromatic composition. UV protection of both the aromatic composition and the carrier resin. 12. Scented resin according to any one of the preceding claims, characterized in that the aromatic composition does not contain any solvent which may be suspected of being carcinogenic, endocrine disruptor or other, no allergen or irritant such as those described in the various directives, in particular the list of allergens contained in the most recent directives of the European Community, - no petroleum or other solvents recommended for cosmetic use, of the benzene, BHT or other type, 13. Perfumed resin according to claim 12, characterized by the fact that it contains none of the allergens contained in Directive 2003/15 / EC 20 of the European Parliament and of the Council of 27 February 2003 identifying 26 fragrance substances liable to cause reactions allergic contact in people who are sensitive to it. 14. Scented resin according to any one of the preceding claims, characterized in that the proportion by weight of the constituents of the aromatic composition relative to the weight of the finished product is: - 10 to 40% perfume base complex containing oils natural essential oils - 5 to 25% of ethyl alcohol of agricultural origin 30 - 3 to 20% of DPM (Dipropylene Glycol Monoethyl Ether) - 3 to 20% of Isopropyl Myristate - 1 to 20% of DPG (Dipropylene Glycol) + dyes and / or deodorant and / or anti-UV 10 2908419 -16-16. Perfumed resin according to any one of the preceding claims, characterized in that the aromatic composition contains ethyl alcohol in a proportion of between 5 and 40% of the total weight of the liquid active product. 17. Perfumed resin according to any one of the preceding claims, characterized in that the aromatic composition contains adjuvants or assemblies of adjuvants intended to regulate the absorption / desorption, within the strict framework of the recommended dosages recognized for the cosmetic use and assembled into a cocktail of heavier products such as DPG (Dipropylene Glycol) retarding absorption and symmetrically desorption and more volatile ingredients such as DPM (Dipropylene Glycol Monoethyl Ether). 18. Process for producing a scented resin according to the preceding claims, characterized in that for the implementation of a new aromatic component, the behavior of each constituent is analyzed and observed beforehand. impregnation so that it corresponds to the most appropriate operating mode and systematically deduce the performance of the final product. 19. Process for producing a scented resin according to Claims 1 to 17, characterized in that the impregnation of the resin in the form of beads is carried out in a bezel for 45 to 60 minutes followed by a rest period of several hours during which a delay system will make a few turns to the bezel at regular intervals, so that the impregnation is progressive and total, the perfume beads never take in mass at the time of impregnation and no component is returned in the liquid phase during desorption, but still in the vapor phase. 20. Process for producing a scented resin according to Claims 1 to 17, characterized in that it is used to produce thermoformed plastic elements of any kind, either by adding said scented resin in the form of a masterbatch ( "master batch" technique) in all other raw materials compatible with said plastic material, either by shaping the elements directly from this resin or by producing by any means a piece of PEBAX or similar resin decorated or not and impregnating a posteriori complex aromatic composition.