WO2015000470A1

WO2015000470A1 - Gel for producing a coating for a finger nail

Info

Publication number: WO2015000470A1
Application number: PCT/DE2014/100231
Authority: WO
Inventors: Hans HUBRICH; Thomas Beyerlein; Elena REICHERT; Jürgen Burkhardt
Original assignee: Polystone-Chemical Gmbh
Priority date: 2013-07-04
Filing date: 2014-07-04
Publication date: 2015-01-08
Also published as: DE112014003112A5; DE102013107030A1

Abstract

The invention relates to a gel for producing a coating for a finger nail, in particular for producing an artificial fingernail, comprising a resin, a reactive diluent and a photopolymersation catalyst. According to the invention, the reactive diluent is formed from monomers which have a molecular weight of 300g/mol. Said reactive diluent comprises a monomer having at least one ethylenically unsaturated group, preferably tetraethylene glycol dimethacrylate-based monomers. In a preferred embodiment of the invention, the resin is devoid of both hydroquinone (HQ) and p-hydroxyanisole (HQME). Advantageously, the gel has a cellulose compound as a source agent for detaching the coating, formed from the gel, from the fingernail.

Description

Description:

"Gel for making a cover for a fingernail"

The invention relates to a gel for producing a coating for a fingernail, in particular for producing an artificial fingernail, which comprises a resin, a reactive diluent and a photopolymerization catalyst.

The invention further relates to a use of the gel for the production of a coating for a fingernail.

Such gels are known for use in the manufacture of artificial fingernails. The gels are usually applied to a carrier layer of UV-polymerized plastic, which is provided for better adhesion of the gel on the natural fingernail. After 2 to 3 weeks, the carrier layer and the gel are filed off the nail again. The problem is that both the carrier layer and the known gels contain toxic or / and irritating substances.

Because of the chemical and mechanical stress when applying and filing the artificial fingernail, the natural fingernail is attacked.

The invention has for its object to provide a gel of the type mentioned, which can be applied healthily without any concern directly on the fingernail.

The problem solving gel according to the invention is characterized in that the reactive diluent is formed from monomers having a molecular weight> 300 g / mol.

Advantageously, such a reactive diluent can not or only very slightly penetrate into the nail and into the skin because of the size of the molecules. It will achieved such a good compatibility of the gel with the skin, so that the gel can be provided for immediate placement on the fingernail.

A particularly high level of safety against nail and skin intolerance is achieved if the reactive diluent is formed from monomers having a molecular weight> 500 g / mol.

In one embodiment of the invention, the reactive diluent, which is preferably present in a proportion of 10 to 40% by weight, preferably 20 to 30% by weight, in the gel, is formed by a monomer having at least one ethylenically unsaturated group. Tetraethylene glycol dimethacrylate-based monomers have proven particularly effective for the application; Alternatively or additionally, however, would also be a reactive diluent in question, the lauryl methacrylate, polypropylene glycol monomethacrylate, phenethoxymethacrylate, propoxylated trimethylolpropane trimethacrylate, trimethylolpropane ethoxylate triacrylate, polyethylene glycol 200 Dimetha- crylate and / or polyethylene glycol 400 dimethacrylates or consists thereof.

Conveniently, the resin is free of hydroquinone (HQ) and free of p-hydroxyanisole (HQME). These substances, which hitherto are present in the resins used in gels for the production of artificial fingernails, are harmful and corrosive. The presence of these latter substances is legally regulated by the decision of the Scientific Committee on cosmetic products and non-food products intended for consumers (SCC NFP / 0486/01) and requires that cosmetic products containing the substances be used only for Since the gel according to the invention does not contain the substances, it is suitable for direct delivery to the end consumer, which in the preferred embodiment of the invention is suitable for use in private households Gel is also solvent-free, further improving nail and skin compatibility.

In another embodiment of the invention, the resin comprises an acrylic resin. The acrylic resin is expediently formed by at least one, preferably aliphatic, urethane acrylate resin and / or at least one, preferably aliphatic, methacrylate resin. In one embodiment of the invention, the gel for improving the mechanical properties further comprises an epoxy acrylate or an epoxy methacrylate, preferably in a proportion of 1 to 30 wt .-%, particularly preferably 5 to 20 wt .-%. For example, isopropylidenediphenyl can be bisoxyhydroxypropyl

Methacrylates (bisphenol A glycerolate (l-glycerol / phenol) dimethacrylate) may be provided.

The urethane-acrylic resin is suitably present in a proportion of 20 to 60% by weight, preferably 30 to 50% by weight, in the gel. The methacrylate resin is expediently present in a proportion of 10 to 40% by weight, preferably 20 to 30% by weight, in the gel. In one embodiment of the invention, the resin comprises di-HEMA trimethylhexyl dicarbamate. Alternatively or additionally, however, an epoxy acrylate, polyester acrylate or polyester methacrylate would also be suitable. In a preferred embodiment of the invention, the gel is formed such that it is soluble by means of a solvent, preferably by means of acetone.

The gel is expediently provided with a cellulose compound as swelling agent for detaching the coating formed from the gel from the fingernail by means of the solvent, preferably the acetone. The quenching agent is expediently present in a proportion of 0-2% by weight in the gel.

Cellulose acetate butyrate has proven to be a particularly suitable swelling agent, but cellulose nitrate and / or sucrose benzoate are also suitable.

Advantageously, the gel of the invention, after it has been cured to the artificial fingernail, as conventional nail polish by means of a solvent from the fingernail remove. A mechanical removal of the artificial fingernail by filing is not necessary. Damage to the natural fingernail is avoided.

Conveniently, the gel contains the photopolymerization catalyst in an amount of 1 to 10% by weight, preferably 2 to 6% by weight. In one embodiment of the invention, the photopolymerization catalyst comprises phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide and / or ethylphenyl (2,4,6-trimethylbenzoyl) phenylphosphinate, whereupon the phenyl bis (2,4, 6- trimethylbenzoyl) phosphine oxide is preferably present in the gel at from 0.5 to 3% by weight and / or the ethylphenyl (2,4,6-trimethylbenzoyl) phenyl phosphinate at from 2 to 6% by weight. Bis (the † hylamino) phenone, dibenzosuberone, dihydroxybenzophenone and / or thioxanthenone.

In a further aspect of the invention, the gel comprises silica by means of which pigments and / or dyes are stabilized to color the gel in the gel. The proportion of silica in the gel is preferably 0.5 to 3% by weight.

Furthermore, in a further embodiment of the invention, a further constituent in the gel is a defoaming agent, preferably ethylhexyl acrylate, which is preferably present at a maximum of 1% by weight. The defoaming agent preferably also contains a polysiloxane, preferably with a proportion of at most 0.5 wt .-%.

Conveniently, the gel further contains polyether-modified siloxane, preferably in a proportion of at most 1% by weight, by means of which the pigments in the gel are stabilized.

The pigments and / or the dyes for coloring the gel are expediently present in a proportion of 0.1 to 10 wt .-%, preferably 0.1 to 5 wt .-%, before. Butylated hydroxytoluene, if appropriate as a constituent of the resin, is expediently contained in a proportion of not more than 0.5% by weight as stabilizer for the resin in the gel.

The following table gives an overview of compositions with proportion ranges which are adjustable for the gel according to the invention:

Table 1

in which

INCI: Nomenclature according to "International Nomenclature Cosmetic

ingredients "

CAS: Registration number of the "Chemical Abstracts Service"

EINECS: Register number of the "European Inventory of Existing Commercial chemical Substances" A gel according to the invention has the following composition:

Example 1 :

Table 2

Another gel according to the invention has the following composition:

Example 2:

Table 3

Another gel according to the invention has the following composition;

Example 3:

Table 4

Claims

claims:

A gel for producing a fingernail coating, in particular for producing an artificial fingernail, comprising a resin, a reactive diluent and a photopolymerization catalyst,

characterized,

that the reactive diluent is formed from monomers having a molecular weight> 300 g / mol.

2. Gel according to claim 1,

characterized,

the reactive diluent is present in the proportion of from 10 to 40% by weight, preferably from 20 to 30% by weight.

3. Gel according to claim 1 or 2,

characterized,

the reactive diluent comprises a monomer having at least one ethylenically unsaturated group, preferably ethylene glycol dimethacrylate-based monomers, lauryl methacrylate, polypropylene glycol monomethacrylate, phenethoxymethacrylate, propoxylated trimethylolpropane trimethacrylate,

Trimethylolpropane ethoxylate triacrylate, polyethylene glycol 200 dimethacrylate and / or polyethylene glycol 400 dimethacrylate.

4. Gel according to claims 1 to 3,

characterized,

that the resin is free of hydroquinone (HQ) and free of p-hydroxyanisole (HQME).

5. Gel according to one of claims 1 to 4,

characterized,

that the gel is free of solvents.

6. Gel according to one of claims 1 to 5,

characterized,

the resin has an acrylic resin.

7. Gel according to one of claims 1 to 6,

characterized, the resin comprises at least one urethane acrylate resin and / or at least one methacrylate resin, the urethane-acrylic resin preferably being present in an amount of from 20 to 60% by weight, particularly preferably 30 to 50% by weight and / or the methacrylate resin in a proportion of 10 to 40 wt .-%, is present.

8. Gel according to one of claims 1 to 7,

characterized,

that the gel to improve the mechanical properties

Epoxy acrylate and / or an epoxy methacrylate, preferably in a proportion of 1 to 30 wt .-%, preferably 5 to 20 wt .-%.

9. Gel according to one of claims 1 to 8,

characterized,

that the gel is soluble by means of a solvent, preferably by means of acetone.

10. Gel according to one of claims 1 to 9,

characterized,

that the gel is provided with a cellulose compound as a swelling agent for detachment of the gel-formed coating from the fingernail.

11. Gel according to claim 10,

characterized,

the cellulose compound comprises cellulose acetate butyrate, cellulose nitrate and / or sucrose benzoate.

12. Gel according to one of claims 1 to 1 1,

characterized,

that the gel as the photopolymerization catalyst is phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide and / or ethylphenyl [2A6-trimethylbenzoyl) phosphinate, methylbenzoylformate, benzophenone,

Camporquinone, acetophenone, anthraquinone, bis (diethylamino) phenone, dibenzosuberone, dihydroxybenzophenone and / or thioxanthenone.

13. Gel according to one of claims 1 to 9,

characterized,

that the gel has pigments for coloring, the pigments

preferably in a proportion of 0.1 to 10 wt .-%, preferably 0.1 to

5 wt .-%, are present.

14. Gel according to one of claims 1 to 9,

characterized,

that the gel is intended for direct placement on the fingernail.

15. Use of the gel according to any one of claims 1 to 14 for the preparation of a coating for a fingernail, preferably for the production of an artificial fingernail.