WO2014168475A1

WO2014168475A1 - A composition and combination thereof, a method for coating a nail and use of the composition

Info

Publication number: WO2014168475A1
Application number: PCT/NL2014/050222
Authority: WO
Inventors: Rutger Dave VAN OVERBEEK; Jeroen Paul Marie SCHWEITZER
Original assignee: More-To.Com B.V.; Postmeridiem Productions B.V.
Priority date: 2013-04-08
Filing date: 2014-04-08
Publication date: 2014-10-16
Also published as: WO2014168476A1

Abstract

The invention relates to a composition for providing to a nail, comprising a liquid carrier and an additive comprised therein, said liquid carrier being one of: - at least one vaporizable substance, and - at least one curable substance. The composition is characterized in that said additive comprises at least one of: [a] at least one metal salt, [b] at least one electrically conductive polymers and [c] at least one anti-static property providing substance; wherein a concentration of said additive in said composition provides an electrical conductivity to the composition. A preferred embodiment is comprised of a combination of compositions according to the present invention, comprising at least: a first composition with at least one metal salt; and - a second composition with at least one electrically conductive polymer, or at least one anti-static property providing substance; for randomly and sequentially coating a nail with both compositions.

Description

A composition and combination thereof, a method for coating a nail and use of the composition

De The present invention relates to a composition for coating a nail according to the preamble of claim 1. The invention further relates to a combination of compositions according to claim. 25. The invention also relates to a method for coating a nail accord- ing to the claims 22 and 23 and to the use according to claim 28.

Such composition is known in the art. For example, a nail polish is commonly known. Nail polish is available in a nu .ber of varieties, for example as a single layer lacquer or a multilayer lacquer, comprised of at least two of a base coat, a colour coat and a top coat. It has shown that especially people wearing long nails, the length being such that the nail protrudes beyond the finger tip, use nail polish. Among others, solvent based nail polish is known, the solvent being removed from the applied composition by evaporation, such that a solid layer is obtained. Also, nail polish based on curable components are known, like monomers, dimers, trimers and oligomers. These products are commonly identi^¬ fied as "gel nails" and "shellac nails". The present invention is directed to these types of nail polish, hereinafter identified as "gelnail polish". Curing may be obtained by means of polymeriza- tion. A commonly used method is curing using UV radiation, but crosslinkers present in the composition may be used as well.

The present invention is directed to solvent based nail polish .

Within the present invention the term "nail" relates to both a natural nail and an artificial nail. The compositions applied according to the present invention should be compatible with at least one of the nail and the artificial nail.

It is known in the art to pretreat the natural nail by roughening the nail and subsequently applying a primer. The primer is covered with a base coat, forming part of the nail polish- formulation, with a coloring layer and an, optional, top layer. The coloring layer is applied for providing colour to the nail, whereas the top coat provides a long lasting a shiny finish. The base coat may also comprise a coloring agent, such that a separate coloring layer is not required. Furthermore, the top layer may be omitted. Traditional nail polish, based on an evaporating solvent, may be applied as a single layer, but as a multilayer lacquer type as well.

Known nail polish compositions have a common disadvantage, in that they are not suitable for operating a touch screen (a screen that is operated by a user touching the screen with his/her fin- gertips) . An additional disadvantage is that people wearing long nails may not touch the screen with their fingertips, since opera^¬ tion of a touch screen with a natural nail is not possible and the natural nail prohibits contacting the screen with one's finger tips. Such screens cannot be operated with a nail; the screen does not recognize the touch of a nail or is not sufficiently accurate.

So as to enable users of nail polish to operate a touch screen, so-called finger gloves have been provided and that contain a conductive material. These finger gloves however, have the disadvantage that they easily get lost, are removed from the fin- ger tips or yield irritation.

Furthermore, Korean patent application KR 101126101 mentions that an electrically conductive nail polish may be obtained by in^¬ corporating a metal or a metal oxide in the nail polish. A disad^¬ vantage, however, of said nail polish is that the polish is not stable. The nail polish has a short life time since the metals chemically interact with oxygen or other components present in the nail polish and a a consequence change colour of said polish. It has also shown that, after application of said polish to a nail, interaction with oxygen in the air may change the polish' colour. On the other hand, encapsulation of the metal particles may reduce conductivity. These nail polish also demonstrate a high tendency to agglomerate. After a short time, the particles settle. Furthermore, the metals used have the disadvantage that they are detrimental to the skin and/or are to be treated as chemical waste, such reducing the applicability.

A separate electrically conductive touch pen may be used, for example a pen to be stored in the head phone output of the appa- ratus to be operated, so as to store said pen. However, such pen may easily get lost. However, then the pen also blocks the head phone output. These aspects all have the consequence that a user of nail polish or a person wearing long nails is not capable to operate a touch screen.

The invention aims at providing a solution for at least one of the problems mentioned above.

The invention especially aims at providing a solution that enables one to operate a touch screen even when wearing long nails, without the need for placing a finger glove on one's fin^¬ gers .

The invention also aims at providing an attractive and long lasting solution.

The invention further aims at providing a nail polish that is not detrimental to one's health, and especially is skin friendly and nail friendly. In this respect, the invention aims at providing a " 3 free", "4 free" or " 5 free" nail polish. Such compositions are free from formaldehyde, dibutylphtalate (DBP) and toluene ("3 free") ; and also free from formaldehyde resin, TSFR ("4 free"), and free from camphor ("5 free"), respectively.

So as to obtain at least one of the above mentioned aims, ac^¬ cording to a first embodiment the invention provides a composition comprising the features of claim 1. This composition has the advantage that a user, by applying said composition on her nails, will be able to perfectly operate a touch screen. The composition can preferably be applied to all of the nail's surface.

It is especially preferred for the composition to comprise one or more metal salts as additive.

According to an alternative embodiment, it is preferred that the composition comprises at least one electrically conductive polymer .

Furthermore, it is preferred that the composition comprises at least one substance providing an anti-static property. These comprise substances that modify the composition such that, espe- cially when the composition has provided a substantially dry layer on the nail or artificial nail, an electrical charge is able to move over or through said layer. The connections are preferably positioned (i.e. "oriented") within the formed layer or they may provide the layer with an electrically conductive, preferably hy- drophilic, surface.

According to a further aspect, it is preferred for the addi- tive being chosen from at least one of :

[a] a charged polymer, especially a polythiophene based poly^¬ mer,

[b] a finely dispersible carbon,

[c] a polym.er comprising a nitrogen atom in the backbone, and [d] polycarbazole, polyindole, polyazepine, polyacetylene, poly (p-phenylene vinylene) and derivatives hereof;

the concentration of additive in the composition providing an electrical conductivity to the composition. These substances have an especially positive effect on the conductivity of the nail polish.

Preferably, the additive is a polythiophene. More in particular, preference is given to a charged polymer. A general example of a charged polymer is a cationic polymer. Polythiophene is an example of a cationically charged polymer. It is especially pre- ferred for the polythiophene to comprise an oxygen substituted ring compound.

It is especially preferred for the additive to be poly (3,4- ethylene dioxythiophene) , also known as poly (3, 4-dioxythiophene) . This compound has the unique property of providing an excellent conductivity to the formed nail covering. According to a preferred embodiment the invention therefore relates to a composition where^¬ in said carrier provides an electrical conductivity to the dried or cured composition. Such compound has the additional and unique advantage that it is colorless, which has the consequence that no colour change is obtained. The invention therefor also relates to a composition comprising poly ( 3 , -ethylene dioxythiophene) and a coloring agent .

The compound poly ( 3 , 4-ethylene dioxythiophene) has the advantage that it is available as a very finely ground and dispersed material, whereas it still yields a nail polish composition with excellent conductivity. Furthermore, a colorless dispersion is ob^¬ tained when combining same with a nail polish composition. In case poly ( 3 , -ethylene dioxythiophene ) is not completely dissolved in a solvent, a dark colored dispersion is obtained, having a dark blue or dark purple or even black colour. In such case, the composition is suitably applicable as a base coat, or as a base composition for manufacturing dark colored (dark purple, dark blue, black or dark grey) nail coating compositions.

Use of poly ( 3 , 4-ethylene dioxythiophene) is especially pre^¬ ferred when applying same in a liquid comprising poly(styrene sul- phonic acid) as a counter ion. Such combination is available in the art as PEDOT:PSS and is manufactured by and available from Ag^¬ fa. This combination is available as dispersion and provides a very good base for a composition according to the present invention. It is especially preferred to use a so-called "Generation 1" PEDOT:PSS for providing a base layer, because of the low costs of tis substance, whereas preference is given to a "Generation 3" or higher PEDOT:PSS for especially the top layer that provides a considerable higher conductivity at lower dosage than Generation 1 and also yields much less coloring of the composition.

In addition, poly ( 3 , 4-ethylene dioxythiophene) has the ad- vantage that it may be solved both in aqueous liquids and in organic solvent based systems, among which monomer based and solvent based systems. As a consequence, this substance may be suitably used in water based nail polish which has an environmental ad^¬ vantage. The solvability in organic solvents has the advantage that it ca be processed easily in traditional nail polish and all nail polish that are based on curable, i.e. polymerizable, com^¬ pounds .

According to a first aspect, preference is given to a compo^¬ sition comprising an aqueous dispersion or solution.

According to a second alternative aspect the composition com prises a solution or dispersion in an organic liquid.

The composition may be based on a common nail polish as a carrier, to which the additive according to the invention has been added. As a consequence, the carrier may be formulated as a sol- vent in which a soluble resin is dissolved, together with a film former and optionally with a plasticizer and a pigment or dye. Ad^¬ vantageously, the composition may comprise a dispersing agent so as to keep the solids present in the composition in a suspending (suspension) or floating (emulsion) state. Settling of substances is preferably avoided, a dispersing agent may contribute to that. As solvent, use can be made of an alcohol, acetate or water. As soluble resin use may for example be made of formaldehyde, acry- late, nitrocellulose, shellac, polyester, polyether, polycar^¬ bonate, alkyd or a combination thereof, said resin being compati^¬ ble with the solvent used. The substances mentioned above are men^¬ tioned exemplary, other substances are suitable as well, as long as they are usable as part of the carrier, as known in the art.

Preference is given to a composition that comprises a concen^¬ tration of electrically conductive polymer that provides an elec^¬ trical conductivity to the composition. Such ensures that the con^¬ ductivity is sufficient for operating a touch screen. An electri- cally conductive polymer furthermore has the advantage that it has a high compatibility with the base composition of a nail polish, as a consequence such polymer may be easily added to a common nail polish that is used as base composition.

It is especially preferred that the composition comprises a concentration of metal salts that provides an electrical conductivity to the composition. Such ensures a certain conductivity that can be obtained easily and cheaply.

The additive will advantageously and preferably comprise an ionic liquid providing electrical conductivity to the composition. Ionic liquids comprise compounds that are made up of positively charged and negatively charged molecule chains (generally known as ions) . In such systems, the respective connections are to be cho^¬ sen from molecules that retain their ionic properties in the dried state of the composition and that provide a conductivity to the dried layer.

The at least one conductivity providing, more in particular anti-static property providing, substance is chosen from at least one of: fatty acids, glycerol esters of fatty acids, glycerol and glycerol based compositions, alkanol amides, amine-ethoxylates and amide-ethoxylates . These substances provide an excellent conduc^¬ tivity to the cured layer. Furthermore, these substances are com^¬ patible with polymer base compounds of the composition, as men- tioned before. More in particular, preference is given to the use of glycerol esters of fatty acids as an additive, because of its high conductivity at low dosage and excellent compatibility with base compounds .

An especially good result is obtained when using glycerol laurate, providing an excellent conductivity in combination with polythiophene, especially in combination with PEDOT:PSS. Conduc^¬ tivity is about ten times higher when adding glycerol laurate com^¬ pared with a composition not comprising glycerol laurate.

It is especially preferred for the additive to comprise a terminal OH. Such compounds have shown to provide an excellent conductivity, are compatible with the base compounds of the compo^¬ sition and are available at low cost.

Due to the high conductivity of the material, it is preferred that the electrically conductive polymer comprises an aromatic ring compound, for example a polyanilin or polypyrrole, or a polymer comprising an unsaturated bond, for example poly ( acetylene ) .

A material providing electrical conductivity may further be comprised of a conductive carbon in finely dispersed state like graphite. For ease of understanding, the term "carbon" will relate to all conductive states of carbon and the like, such as graphite, nanotubes, buckyballs and graphene . Especially when formulating a black nail polish, carbon is a suitable additive. Carbon may also be incorporated in a base layer and a coloring layer may optional- ly be applied on top of said base layer. A small amount of conduc^¬ tive material in the coloring layer may provide an excellent con^¬ ductivity to the nail composition, in combination with the conductive carbon containing layer. It has also shown that when using a layer that has a reduced conductivity, on top of a carbon contain- ing layer, yields an excellent conductivity in the multiple layer coating. Within the present invention, the term "carbon" relates to all conductive kinds of carbon, like graphite, nanotubes, buck- eyballs and graphene.

So as to obtain a long lasting conductivity, it is preferred that the additive provides an electrical conductivity the dried or cured composition for enabling one to operate a touch screen.

An especially effective composition is obtained when the ad- ditive comprises an electrically conductive coloring agent. Then, the total amount of additives in the base composition may be reduced, due to the fact that a single additive may both provide for coloring and electrical conductivity, providing both economical advantage and advantage with respect to formulating the composition .

So as to be able to apply the composition according to the invention as a topcoat, it is preferred that the additive compris^¬ es a colorless electrically conductive substance. This way, the composition will not influence the look of the previously applied colored nail polish on the nail.

An special embodiment is obtained by means of a composition wherein the additive further comprises at least one of [a] a pre^¬ cious metal and [b] a non-precious metal and an oxidation inhibi- tor. This provides a goof conductivity and also provides the opportunity to yield a coloring effect in the composition, due to the respective metal. The additive may preferably be a nano- dispersion of [a] a precious metal and [b] a non-precious m.etal and an oxidation inhibitor. The precious metal may suitably com- prise silver, preferably a nano-dispersion of silver.

A very advantageous embodiment is obtained by a combination f compositions according to the invention and as mentioned before, comprising at least one of: - a first composition with [a] at least one metal salt and - a second composition with: [b] at least one electrically conductive polymer, and/or [c] at least one anti^¬ static property providing compounds; for randomly and sequentially coating both compositions on a nail. The term "sequentially" means that both the first composition and the second composition may be applied as a first layer on the nail. For example, a first layer comprising electrically conductive metal salt may be applied and a second layer of a composition comprising electrically conductive polymers may be applied on top of said first layer, whereas but a reverse application is also possible and advantageous.

This embodiment provides the advantage that the composition to be applied as a first layer, that may be both the first compo^¬ sition or the second composition, may comprise a pigment or a dye. The composition to be applied as a second layer may optionally be provided as a clear composition.

The invention also relates to a method for providing a conductive layer to a nail, comprising the step of applying to a nail the composition according to the invention. This provides the advantages as mentioned above with respect to the composition.

Advantageously, the method according to the invention comprises the step of applying to an artificial nail the composition according to the invention.

It is especially preferred that the method also comprises the step of applying the composition according to any of the preceding claims to the artificial nail. As a consequence, an excellent op^¬ erability of a touch screen is obtained, even when a user operates said touch screen with a nail tip, or the bottom side of the nail tip .

The invention further relates to a combination of compositions for coating a nail at least comprising: - a first composition according to any of claims 1-19 comprising one or more electrically conductive additives, - a second composition comprising a coloring agent and optionally one or more electrically conductive additives. This provides an adequate formation of a nail coating. The composition to be applied firstly, for obtaining a base coat, preferably provides an excellent conductivity, and the subsequent coating layer may provide a coloring layer, optionally comprising a small amount of a conductive substance for providing an adequate conductivity between the coloring layer and the base coat. This provides an excellent conductivity and operability of a touch screen .

Optionally, the combination may also comprise a third compo^¬ sition as a top coat. The top coat may be a common top coat, op- tionally provided with a small amount of an electrically conduc tive substance.

The composition may be based upon a common nail polish as carrier, to which an additive according to the present invention has been added. The nail polish may be applied in a single layer or in multiple layers (for example a base coat, a coloring layer and an optional top coat). The carrier may therefore be formulated as a solvent in which an additive is mixed, together with one or more of a film former, a plasticizer, a pigment and a dye. A solvent m.ay be comprised of an alcohol, acetate or water. A soluble resin may be comprised of a formaldehyde, acrylate, nitrocellulose, shellac or polyester, wherein said resin should be compati- ble with the solvent used. The substances mentioned above are mentioned as an example, other substances are suitable as part of the carrier, as is known in the art.

Preference is given to a composition comprising a concentra^¬ tion of electrically conductive polymer that provides an electri- cal conductivity to the composition. This ensures a conductivity that is sufficient for operating a touch screen. An electrically conductive polymer furthermore has the advantage that it is com^¬ patible with the base composition of a nail polish, and as a con^¬ sequence it can be added easily to an existing base nail polish. For example, a single layer nail polish composition ca be obtained .

The substance mentioned before, polythiophene (such as poly ( 3 , 4-ethylene dioxythiophene ) ) , polyanilin and polypyrrol may be suitably applied in a base coat composition. Such formulation of a base coat proves to have an excellent conductivity. A coloring layer to be applied over said base coat will preferably con^¬ tain a small amount of a conductive substance, just like the op^¬ tional top coat.

An electrically conductive substance to be applied in the coloring layer and the optional top coat may be suitably chosen from at least one of: polythiophene (like poly ( 3 , 4-ethylene dioxy- thiophene)), polyanilin, polypyrrole, fatty acids, glycerol esters of fatty acids, glycerol and glycerol based substances, alkanol amides, amine-ethoxylates and amide-ethoxylates . These substances prove to provide an excellent conductivity. Furthermore, these substances have a good compatibility with base compounds of known coloring compositions, as mentioned before. Especially the use of glycerol esters of fatty acids as additive is preferred, since the excellent compatibility thereof with the base compounds. More in particular, these substances do not negatively influence the strength of cured or dried top coat and coloring layer.

Also, the top coat composition will preferably comprise a certain amount of electrically conductive substance, chosen from the same group of substances.

More in particular, it is preferred that he additive comprises a polymer or compound having a very polar (preferably terminal) group, for example an OH or some other suitable functionality. Such substances seem to provide an excellent conductivity, are compatible with the base compounds and are cheap.

So as to provide a long lasting and at all times sufficient conductivity, it is preferred that the additive provides an elec- trical conductivity to the dried or cured composition.

To be able to use the composition according to the invention in a top coat composition, it is preferred that the additive com^¬ prises a colorless electrically conductive substance. Then, the composition will not influence the appearance of a previously ap- plied colored nail polish on the nail.

The composition according to the invention is preferably applied as a base coat, after which a coloring layer and a top coat are applied. The layers are sequentially applied on a nail.

Finally, the invention relates to the use of a composition according to the invention, especially of polythiophene, preferably poly ( 3 , 4-ethylene dioxythiophene) , or preferably at least one of polyanilin and polypyrrole, as electrically conductive sub^¬ stance in a composition or coating a nail. Preferred embodiments of this application or use, are depicted in the several preferred embodiments of the composition according to the invention as mentioned above and as mentioned in the claims 1-19.

Excellent results are obtained with the following

compositions (all parts in volume) :

Base layer: 0.02 part PEDOT + 0.02 part glycerol laurate + 1 part standard base layer.

Colour layer: 0.02 part PEDOT + 0.02 part glycerol laurate + 1 part standard colour layer.

Top layer: 0.0025 part PEDOT + 0.0025 part glycerol laurate

+ 1 part standard top layer.

PEDOT:PSS was added to a solvent of a nail polish, or to a commonly used and standardly available nail polish, usually com^¬ prising a mixture of butyl acetate and ethyl acetate. The invention is not limited to the embodiments mentioned before. The invention is only limited by the appending claims.

The invention is also directed to all and every combination of features that have been described independently of each other.

Claims

C L A I M S

1. A composition for providing to a nail, comprising a liguid carrier and a carrier comprised therein, said liguid carrier being chosen from one of:

- at least one vaporizable substance, and

- at least one curable substance,

characterized in that said carrier is chosen from at least one of:

[a] at least one metal salt,

[b] at least one electrically conductive polymer, and

[c] at least one anti-static property providing substance;

wherein a concentration of said additive in said composition provides an electrical conductivity to the composition.

2. A composition according to claim 1, said composition comprising an ionic liquid providing an electrical conductivity to the compo- sition.

3. A composition according to claim 1, said at least one antistatic property providing substance comprising an orienting molecule .

4. A composition according to claim 1, said at least one antistatic property providing substance being chosen from at least one of: fatty acids, glycerol esters of fatty acids, alkanol amides, amine ethoxylates and amide ethoxylates .

5. A composition according to claim 1, said additive being chosen from a terminal OH.

6. A composition according to claim 1, said electrically conduc- tive polymer being comprised of an aromatic ring containing polymer, preferably a polyaniline, or an unsaturated polymer, preferably poly (acetylene ) .

7. A composition according to claim 1, said carrier being chosen from at least one of:

[a] a charged polymer, especially a polythiophene based polymer,

[b] a finely dispersible carbon,

[c] a polymer comprising a nitrogen atom in the backbone, and 5 [d] polycarbazole, polyindole, polyazepine, polyacetylene,

poly (p-phenylene vinylene) or a derivative thereof;

the concentration of additive in the composition providing an electrical conductivity to the composition.

10 8. A composition according to claim 7, said polythiophene comprising an oxygen substituted ring compound.

9. A composition according to claim 7, said carrier being comprised of poly ( 3 , 4-ethylene dioxythiophene ) .

15

10. A composition according to claim 9, said carrier comprising poly(styrene sulfonic acid) as a counter-ion.

11. A composition according to claim 7, said carrier being chosen 20 from carbon, preferably graphite, nanotubes, buckeyballs and gra- phene .

12. A composition according to any of the preceding claims, said composition comprising an aqueous dispersion or solution.

25

13. A composition according to any of the preceding claims, said composition comprising a solution or dispersion in an organic liquid .

30 14. A composition according to any of the preceding claims, further comprising a coloring agent.

15. A composition according to any of the preceding claims, said carrier providing an electrical conductivity to the dried or cured 35 composition.

16. A composition according to any of the preceding claims, said carrier comprising an electrically conductive coloring agent.

17. A composition according to any of the preceding claims, said additive comprising a colorless substance.

5

18. A composition according to any of the preceding claims, said carrier further comprising one of [a] a precious metal and [b] a non-precious .etal and an oxidation inhibitor.

10 19. A composition according to claim 10, the composition comprising at least poly ( 3 , 4-ethylene dioxythiophene ) and glycerol laurate .

20. A combination of compositions according to any of the preced- 15 ing claims, comprising at least:

- a first composition with [a] at least one metal salt and

- a second composition with: [b] at least one electrically conductive polymer, or [c] at least one anti-static property providing substance ;

20 for randomly and sequentially coating a nail with both composi^¬ tions .

21. A combination according to claim 20, a firstly applied composition further comprising a coloring agent.

25

22. A method for providing a conductive layer to a nail, compris^¬ ing the step of applying the composition according to any of the claims 1-20 to the nail.

30 23. A method for providing an electrically conductive layer to an artificial nail, comprising the step of applying the composition according to any of the claims 1-20 to the artificial nail.

24. A method according to claim 22 or 23, respectively, at least 35 comprising the step of applying the composition to the tip and the bottom side of the nail or to the artificial nail, respectively.

25. A combination of compositions for coating a nail according to any of the preceding claim.s, at least comprising:

- a first composition according to any of claims 1-19 comprising one or more electrically conductive additives,

- a second composition comprising a coloring agent and optionally one or more electrically conductive additives.

26. A combination according to claim 25, further comprising a third composition as a top coat.

27. A combination according to any of claims 25 and 26, one of said compositions comprising an electrically conductive additive, chosen from at least one of: fatty acids, glycerol esters of fatty acids, glycerol and glycerol based compositions, alkanol amides, amine-ethoxylates and amide-ethoxylates .

28. Use of a composition according to claim 1-19, preferably comprising polythiophene , preferably poly ( 3 , 4-ethylene dioxythio- phene), or preferably at least one of polyanilin and polypyrrole, as electrically conductive additive in a composition for coating a nail .