Patent Application
20220096695
The present invention relates to a composition for diffusing volatile substances, in particular, for use as an air freshener or insecticide.
There are different products on the market that contain impregnated wax-based volatile substance formulations for use in a heated device, without needing to use combustion to release the volatile substances. The wax in these containers melts and releases the volatile substances into the environment.
Current solutions are limited in their properties as a product for diffusing volatile substances due to the limitations of the wax itself.
The wax is characterised by having a relatively low absorption by weight limit of formulation depending on the wax used. For example, wax of only paraffinic origin does not support more than 3% by weight and it is not recommended for other waxes to have much more than 6% by weight.
When trying to increase the fragrance ratio above this threshold, the wax begins to expel the fragrance creating an effect where it seems that the product “sweats”. As a result, the ratio of product size to the amount of fragrance is limited.
Another feature of this type of product is that the wax, once it is heated and goes into a liquid state, is not able to retain volatile substances for a long time, causing this type of product to be perceived very intensely at the beginning with a high degree of fragrance evaporation, but within a few hours there is no longer a fragrance.
Therefore, an objective of the present invention is to provide a composition for diffusing volatile substances that enables the percentage of volatile substances to be increased, that is, the percentage of fragrance, and the release time to be lengthened.
The aforementioned drawbacks are resolved by the composition of the invention, having other advantages that are described below.
The composition for diffusing volatile substances, according to the present invention, comprises wax, and it is characterised in that it further comprises solid material that includes volatile substances.
Advantageously, said solid material is in the form of particles, for example, of ethylene-vinyl acetate (EVA).
Furthermore, in the composition for diffusing volatile substances according to the present invention, said solid material has a volatile substance absorption capacity greater than the volatile substance absorption capacity of the wax.
For example, the volatile substance absorption capacity of the solid material is twice that of the volatile substance absorption capacity of the wax.
According to a preferred embodiment, the composition for diffusing volatile substances of the present invention comprises a percentage by weight of wax between 60 and 70%, for example, 65%, and a percentage by weight of solid material between 40 and 30%, for example, 35%.
If desired, the wax can also comprise volatile substances, although it is also possible for the volatile substances to only be in the solid material, in which case, the volatile substances of the solid material may be different from the volatile substances of the wax.
The solid material used is capable of absorbing more formula than the wax (>6%). When the wax melts, it goes into a liquid state, but the material remains solid.
The main advantages of the composition according to the present invention are the following:
In order to better understand the foregoing, drawings are provided wherein, schematically and solely by way of non-limiting example, a practical case of embodiment is represented.
The composition for diffusing volatile substances according to the present invention comprises wax and solid material, for example, solid particles.
Said solid material is preferably ethylene-vinyl acetate (EVA) and has a capacity to absorb more volatile substances than wax, such as for example, twice the volatile substances absorption capacity than that of wax, considering the same volume.
In the composition according to the present invention, the volatile substances may be contained in the wax and in the solid material, or only in the solid material, as desired. In the event that the wax and solid material include volatile substances, they can be different from each other to provide different features.
An example of the composition according to the present invention and a comparative example of a conventional composition are described below.
In this example, the composition was a 11 g block of wax, with 5% of volatile substances, that is, 0.55 g.
It was evaluated how much solid material (EVA) would be needed to double the amount of volatile substances in the same volume as the original block. After an initial estimate and considering that said solid material is capable of absorbing 20% of volatile substances, a mixture is obtained as a result (considering that both materials had a similar density) where approximately 65% by weight was wax impregnated with volatile substances and 35% by weight was EVA impregnated with volatile substances, obtaining twice the amount of volatile substances for the same occupied volume.
A comparison composition was also made with only wax impregnated with volatile substances and a mixture with the percentages mentioned above. A heated device was used and the two products were compared. After 24 hours, the results are shown in the graph of
Based on said graph and said table, the following conclusions can be drawn:
Despite the fact that reference has been made to a specific embodiment of the invention, it is evident for a person skilled in the art that the described composition is susceptible to numerous variations and modifications, and that all the aforementioned details may be replaced by other, technically equivalent ones, without falling outside the scope of protection defined by the attached claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| P201830927 | Sep 2018 | ES | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2019/076039 | 9/26/2019 | WO | 00 |
