JP6541101B2 - Film-forming composition for nails - Google Patents

Description

  The present invention relates to film-forming compositions for nails. More specifically, the present invention relates to a composition used before applying gel nails or acrylic nails to nails.

In recent years, in the field of nail art, gel nails in which a gel-like photocurable resin is cured with a UV light or an LED light have become popular. Gel nails are characterized by having better (durability) compared to polish (manicure), and while gel polish has only about 1 week, gel nails have about 3 to 4 weeks.
However, while having good holding ability, gel nails have the disadvantage of being difficult to turn off (hard to remove). While polish can be removed immediately with a dedicated light removal solution, gel nails need to be immersed in the remover (removal solution) for a considerable amount of time. Furthermore, it may not be able to be removed by immersion in the remover, and it may be necessary to scrape and remove the remaining gel.

  The gel nails implemented at the nail salon are important not only in terms of design but also in terms of their good quality. Therefore, gel nails currently handled in the market have the highest priority, and as a result, there is a problem that it is difficult to turn off as described above.

The problem that removal is difficult is not only the problem that it takes a long time to immerse your fingers in the remover, it also takes a long time to take off, such as multiple removals by the remover, and gel that could not be removed by the remover. Physical removal using a spatula or a file can also cause problems such as deteriorating the condition of the nail (for example, the nail may be damaged, the nail may become thinner, or the nail strength may be reduced).
If the self-nails become weak, the artificial nails such as gel nails will be treated again to increase the strength of the nails, but if the self-nails are thin, the holding of the artificial nails will deteriorate.

  As described above, if the gel nail has a good holding ability, the problem arises that it becomes difficult to turn it off, and as a result, the self-nail tends to fall into an unhealthy state. And, if the condition of one's own nails is bad, the holding of gel nails will deteriorate, and a vicious circle of better holding of gel nails is required. Also, the same problem arises with acrylic nails, which are one of the same nail systems.

  In relation to such problems, Patent Document 1 discloses a nail coating agent containing a solvent such as shellac and ethanol, and a method of forming a film using the nail coating agent, and the coating film is a gel. It is disclosed that gel nails can be removed without removing the nails that would damage their own nails when used as a base coat for nails.

JP, 2013-81749, A

  However, there is still a need for a composition that can be easily turned off without losing the goodness of gel nails and acrylic nails (hereinafter referred to as gel nails and the like).

  In view of the situation described above, the present invention is a film-forming composition for nails that can easily turn off gel nails and the like and reduce damage to the nails while maintaining the characteristic of having good properties such as gel nails. The challenge is to provide

  In order to solve the above-mentioned subject, the present inventor tried coexistence of high adhesive strength and easiness to turn off by providing a spacer between an artificial nail consisting of gel nail etc. and a self-nail, and as a result of repeating examinations. And succeeded in developing a composition compatible with both. The film-forming composition of the present invention which can solve the above problems has the following constitution.

A film forming composition for nails, comprising
Containing a film forming component, a polymerizable monomer having a hydrophilic group, and a polymerization initiator in an organic solvent,
The film-forming component is poorly soluble in water and soluble in organic solvents;
The concentration of the film-forming component is 8 to 55% by weight, the concentration of the polymerizable monomer is 2 to 30% by weight, and the concentration of the film-forming component is higher than the concentration of the polymerizable monomer.
A film-forming composition characterized by

  The film-forming composition according to the present invention is applied to the nail before applying the gel nail or the like, and plays a role as a spacer between the self-nail and the gel nail or the like. The film-forming component contained in the composition according to the present invention is soluble in an organic solvent which is less likely to be touched in daily life, and is hardly soluble in water which is frequently touched. It's easy to do. In addition, it is difficult to achieve both ease of turning off and goodness with film forming components alone, but in the present invention, the polymerizability having a hydrophilic group as a component having good affinity and reactivity with gel nails etc. The monomer is used, the concentration of the film forming component is 8 to 55% by weight, the concentration of the polymerizable monomer is 2 to 30% by weight, and the concentration of the film forming component is more than the concentration of the polymerizable monomer. By raising the height, both ease of turning off and goodness of holding can be achieved.

  By applying the film-forming composition according to the present invention to the nail before applying the gel nail or the like, the gel nail or the like can be easily turned off, and the goodness of being a feature such as the gel nail can be maintained. Can.

  The film-forming composition according to the present invention can be used in combination with a commercially available normal gel nail or the like. There are two types of gel nails: a soak-off gel (soft gel) that can be removed with a remover, and a hard gel that does not dissolve in the remover, so it needs to be physically removed. Soak-off that can be removed with a remover Gel is the mainstream, and "gel nail" in the present specification means soak-off gel.

The film-forming component according to the present invention is poorly soluble in water and soluble in organic solvents. The film-forming component of the present invention is hardly soluble in water and therefore hardly detached in daily life, but is soluble in an organic solvent, so it is easy to be turned off by the organic solvent. Here, the term “poorly soluble in water” means a state in which swelling or dissolution is hardly observed even after one hour of immersion in water, and the state before immersion remains / is maintained. The term "soluble in an organic solvent" means a state in which when it is immersed in an organic solvent, it swells and dissolves within one hour and the shape before immersion is lost or not maintained.
Further, the film forming component means a resin in which a film is formed on the surface of an object by dissolving in a solvent and applying the solution to the object and then evaporating and drying the solvent (casting method).

  Examples of the organic solvent include alcohol-based, ketone-based, and ester-based organic solvents used as a remover for gel nails and the like. Acetone is most commonly used as a gel nail remover, but if acetone is used, symptoms such as whitening of the hands are likely to occur. Therefore, if a component that can be dissolved in an alcohol (such as ethanol or 2-propanol) having higher safety is selected as the film forming component, the alcohol can be used as a remover, which is more preferable.

  In particular, film-forming components having high solubility in ethanol are preferable, and examples thereof include shellac, ethyl cellulose, rosin, benzoin gum and nitrocellulose. In particular, shellac and rosin are preferred.

  The concentration of the film forming component in the composition according to the present invention is 8 to 55% by weight, and the concentration of the polymerizable monomer is 2 to 30% by weight. When only the film-forming component is used, as the amount of the film-forming component is increased, the gel nail etc. becomes easy to turn off, but the adhesion durability (holding of the gel nail etc) becomes worse, and the amount of the film-forming component The adhesion durability is easy to maintain, but it is difficult to turn off. For this reason, the composition of the present invention further contains a polymerizable monomer. However. If the amount of the polymerizable monomer is too large, adhesion durability will be good, but it will be difficult to turn off. In the present invention, therefore, the concentration of the film forming component is 8 to 55% by weight. By setting the concentration to 2 to 30% by weight and setting the concentration of the film forming component higher than the concentration of the polymerizable monomer, both the ease of turning off and good adhesion durability are achieved.

The concentration of the film-forming component in the composition according to the present invention is more preferably 9 to 50% by weight, and the concentration of the polymerizable monomer is more preferably 2.5 to 25% by weight.
When importance is attached to adhesion durability, the concentration of the film forming component is preferably 9 to 20% by weight (particularly 9 to 15% by weight), and the concentration of the polymerizable monomer is preferably 3 to 6% by weight. On the other hand, when importance is given to the ease of turning off, the concentration of the film forming component is preferably 20 to 50% by weight, and the concentration of the polymerizable monomer is preferably 3 to 6% by weight. In addition, when the film forming component is 20 to 50% by weight (especially 30 to 40% by weight) and the polymerizable monomer is 15 to 35% by weight (especially 20 to 30% by weight), high adhesion durability is maintained. It also makes it easier to turn it off.

  100: 8-70 are preferable and, as for the weight ratio of the said film formation component and a polymerizable monomer, 100: 9-65 are more preferable.

The polymerizable monomer according to the present invention has a hydrophilic group. By using a polymerizable monomer having a hydrophilic group, it is possible to improve the familiarity with self nails and the familiarity with gel nails. As a polymerizable monomer which has a hydrophilic group, the polymerizable monomer which has a hydroxyl group, a carboxyl group, a phosphoric acid group, a sulfonic acid group, and an amino group is mentioned, for example. As preferable examples, 2-hydroxyethyl acrylate having a hydroxyl group, 2-hydroxypropyl methacrylate, glycerol monomethacrylate, acrylic acid having a carboxyl group, methacrylic acid, 4-methacryloylethyl trimellitic acid, 2-meta having a phosphoric acid group There may be mentioned chlorooxyethyl acid phosphate.
In addition to the polymerizable monomer having a hydrophilic group, a polymerizable monomer having no hydrophilic group can also be used. Preferred examples of the polymerizable monomer having no hydrophilic group include isobornyl methacrylate, triethylene glycol dimethacrylate, 2,2,4-trimethylhexamethylene bis (2-carbamoyloxyethyl) dimethacrylate (UDMA). Etc.

  As a polymerization initiator which concerns on this invention, the well-known photoinitiator used for photocurable resin, such as gel nail, can be used. As a photopolymerization initiator, benzoin ethers, benzyl ketals, α-hydroxyalkylphenones, α-aminoalkylphenones, acyl phosphine oxides, α-dialkoxyacetophenones, benzophenones, thioxanthones, titanocenes, oximes Esters are mentioned. Preferred examples include benzoin ethers (benzoin ethyl ether, etc.), acyl phosphine oxides (2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, etc.), α-hydroxyalkylphenones (1-hydroxy-cyclohexyl-phenyl-) Ketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one and the like). Moreover, these photoinitiators can be selected according to the wavelength of the light to be used, and several kinds of photoinitiators may be added. Although the concentration of the polymerization initiator in the composition according to the present invention depends on the type of the polymerization initiator, it is usually preferably about 0.5 to 2.5% by weight, about 0.7 to 2.0% by weight Is more preferred.

The film-forming composition according to the present invention can further contain a photopolymerization accelerator. By including the photopolymerization accelerator, the curing reaction of the film-forming composition tends to proceed, and the reactivity with components (base gel, color gel, etc.) applied on the film-forming composition is improved. Preferred photopolymerization accelerators include tertiary amines. The tertiary amine may be an aliphatic amine or an aromatic amine.
A preferred example is N-methyldiethanolamine which is an aliphatic tertiary amine.
Although the concentration of the photopolymerization accelerator in the composition according to the present invention depends on the kind of the photopolymerization accelerator, usually 0.1 to 0.5% by weight is preferable, and 0.15 to 0.3% by weight Is more preferred.

Further, as the organic solvent contained in the composition according to the present invention, alcohol-based, ketone-based and ester-based organic solvents may be mentioned, and in particular, acetone and lower monohydric alcohol having 1 to 3 carbon atoms (ethanol, 2 -Propanol etc.) is preferable.
The proportion of the organic solvent in the composition according to the present invention is preferably 35 to 90% by weight.

  The film-forming composition according to the present invention may contain, in addition to the components described above, a polymerization inhibitor for controlling the degree of polymerization, and components such as an ultraviolet light absorber and a colorant.

  To briefly explain the general procedure for performing gel nailing (when the composition according to the present invention is not used), first, the surface of the nail is lightly polished to improve adhesion between the nail and the gel nail. (Sanding) Thereafter, dust and oil and moisture of nails are wiped off, then a base gel is applied, light is applied to cure, and then a color gel is applied and light is applied to cure. The color gel application process is often repeated several times. Then, as a finish, a top gel is applied and lighted to cure.

The film-forming composition of the present invention may be applied to the nail before applying the base gel, or the film-forming composition of the present invention may be used as a base gel.
In addition, the composition of the present invention is an acrylic nail (similar to gel nail, it is a chemical polymerization of a two-liquid mixture containing a polymerizable monomer and containing benzoyl peroxide as a polymerization catalyst and a tertiary amine as a polymerization accelerator. The acrylic nail may be applied to the nail prior to the treatment, as it can be used as a spacer between cured and the nail.
Since the film-forming composition according to the present invention contains a polymerizable monomer and a polymerization initiator, it is applied to nails and then irradiated with light such as UV light or LED light used when performing gel nails and the like. It hardens by forming a film. It is preferable to apply | coat except the part in the case of a nail | claw rather than apply | coating the film formation composition concerning this invention to the nail | claw whole surface.

  If the film forming composition of the present invention is applied to the nail before the treatment such as gel nail, soaking off of the gel nail or the like by the remover becomes easy, so the gel remaining on the nail is filed by filing etc. The time to physically remove is reduced. Thus, the nails can be prevented from being damaged and the nails can be kept healthy. In addition, it is possible to shorten the time taken to turn off gel nails and the like.

  Hereinafter, the film-forming composition according to the present invention will be described in more detail using examples.

  The respective components were weighed and mixed in a brown bottle at the blending ratio shown in Table 1 below (% in the table indicates% by weight) to prepare a film forming composition of a low viscosity liquid.

  Next, using the film-forming composition of the example or the comparative example, a film was formed on the nails of both hands of a person, and then gel nail was applied. The procedure is as follows. In addition, the operation procedure of a normal gel nail is the same as the following operation procedure except not performing Step 3 and Step 4.

[Procedure of gel nail of Examples 1-11 and Comparative Examples 1-2]
Process 1 Sanding nail surface with sponge file (preparation)
Process 2 Process of removing dust and oil and moisture of nail with cotton containing nail wipes (trade name: Fururia gel nail wipe [Nisshin Co., Ltd.]) Apply the composition of Example or Comparative Example (Apply except at the time of nails)
Process 4 Irradiate light (20 seconds), and perform polymerization (The light irradiation device used is a full-color gel LED LIGHT [Nisshin Co., Ltd.] The same applies below)
Process 5 Apply base gel (trade name: Fururia gel base gel [Nisshin Co., Ltd.)], irradiate with light (5 seconds), and perform polymerization Step 6 color gel (trade name: Fururia gel color gel [ Apply Nissin Co., Ltd.], irradiate light (20 seconds), and carry out polymerization Step 7 Perform step 6 again Step 8 Top gel (trade name: Fururiagel Topgel [Nisshin Co., Ltd.)] Process 9 of applying, irradiating with light (20 seconds) and performing polymerization Wipe off the unpolymerized surface of the nail surface with cotton containing nail wipe (trade name: Fururia gel nail wipe [Nissin Co., Ltd.]) .

[Determination procedure of gel nail of Example 12]
Prior to Step 3, a base agent (trade name: Fururia-Primer [Nissin Co., Ltd.]) was applied to enhance adhesion with nails, and then Step 3 was carried out in the same manner as the above procedure. is there.

[Determination procedure of gel nail of comparative examples 3 and 4]
It is the same as the above procedure except that the composition applied to the nail is naturally dried instead of the polymerization treatment in step 4.

[Determination procedure of gel nail of reference example]
The above procedure is the same as the above procedure except that steps 3 and 4 are omitted (ie, the same as the conventional gel nail procedure).

  Moreover, about the composition of an Example and a comparative example, the water resistance of a coating film, the ease of applying a composition to a nail, the adhesion durability of a gel nail, the appearance of a gel nail at the time of off, a gel nail off. The ease of handling (swelling and collapsing due to organic solvents) and the degree of remaining gel on the nail surface after off were evaluated. The respective procedures and evaluation criteria are as follows.

[Tolerance to water]
The composition of the example or comparative example is applied to a glass plate, and after the organic solvent is volatilized, it is applied to running water. After that, wipe off the water adhering to the glass plate and check if the coating film does not melt and remains on the glass plate.
<Evaluation criteria>
○: The coating does not melt away ×: The coating does not remain molten

[Ease of applying to nails]
The ease of application of the compositions of the examples or comparative examples in step 3 of the above-mentioned treatment method was evaluated.
<Evaluation criteria>
○: Easy to apply uniformly :: Can be applied but difficult to be uniform ×: Hard to apply

Bonding Durability
After the gel nails were applied by the above-mentioned method, the state of the gel nails was continuously observed, and for each nail, the period during which peeling and chipping of the gel nails were not observed was regarded as the adhesion period, and scored according to the following criteria. The numerical values shown in Table 1 are the average value of the score of each nail.
<Evaluation criteria>
100 points: bonding time 4 weeks or more 75 points: bonding time 3 weeks or more-less than 4 weeks 50 points: bonding time 2 weeks or more-less than 3 weeks 25 points: bonding time 1 week or more-less than 2 weeks 0 points: bonding time 1 Less than a week

[The appearance of gel nail at off time]
Before turning off (at 4 weeks after the treatment or at the time of peeling), the appearance of the gel nail was observed and evaluated according to the following criteria.
<Evaluation criteria>
:: good appearance 見 え る: the coating film is visible when gazing at a glance x: the coating film can be recognized at a glance, or it can be seen that the gel nail is floating from the nail

[Ease of turning off]
The following soak-off work was carried out at 4 weeks of treatment. When exfoliation occurred by 4 weeks after the treatment, soak-off work was performed when exfoliation occurred.
[Soak off procedure]
Step 1: Scrub with a file that the top gel layer becomes cloudy Step 2: Stain acetone with cotton (trade name: Fururia gel gel remover [Nissin Co., Ltd.]), place it on the nail, and cotton with aluminum foil Step 3: Remove the part that has lifted spontaneously due to the penetration of acetone using a stick etc. <Evaluation criteria>
After the acetone treatment in step 2, remove the aluminum foil every 5 minutes and observe the condition of the nail. The time when the gel nail could be removed by about 80% of the surface area of the nail was taken as the off time, and scored as follows. The numerical values shown in the table are the average value of the score of each nail.
100 points: 5 minutes off time 75 points: 10 minutes off time 50 points: 15 minutes off time 25 points: 20 minutes off time 0 points: 25 minutes off time or more

[Remaining condition of gel on nail surface after off]
The condition of the nail after the above-mentioned OFF treatment was observed and evaluated according to the following criteria.
<Evaluation criteria>
○: No gel residue can be confirmed visually (no unevenness on the nail surface)
:: There is a spot where the gel residue is visually observed ×: The gel residue can be immediately recognized visually (the surface of the nail is uneven)

Table 1 shows the details of the compositions of Examples or Comparative Examples and the summary of the evaluation results.

As apparent from Table 1, when a water-soluble polyvinyl alcohol or carboxymethyl cellulose is used as a film-forming component (Comparative Examples 1 and 2), the off is remarkably remarkable as compared with the reference example (normal nail gel treatment method). It became easy, but the adhesion durability became very bad (the holding of gel nail became about one week).
In addition, even when a poorly water-soluble component was used as the film-forming component, when the polymerizable monomer was not contained (comparative examples 3 and 4), the off became easier compared to the reference example. However, the adhesion durability was not sufficient. In addition, when it did not contain a polymerizable monomer, it became easy to turn off as the quantity of a film formation component was increased, but the tendency for adhesion durability to worsen was seen, and it was easy to turn off and adhesion only with a film formation component. It was difficult to maintain both durability.
On the other hand, in the composition of the present invention (Examples 1 to 12) containing the polymerizable monomer in addition to the water-insoluble film-forming component which is hardly soluble in water, the adhesion durability is not significantly impaired compared to the reference example. , Could reduce the off time.
In particular, a composition having a concentration of the film forming component of about 9 to 15% by weight and a concentration of the polymerizable monomer of about 3 to 4% by weight (Examples 1 to 8) has the same adhesion durability as the reference example. The off time was shorter than the reference example.
Moreover, although the composition (Example 9 and Example 11) which made the density | concentration of a film formation component increase to 23.5 weight% or 50 weight% is inferior in adhesive durability compared with Examples 1-8, it is off. The time could be further reduced.
Further, the composition (Example 10) in which both the concentration of the film forming component and the concentration of the polymerizable monomer were increased (Example 10) maintained the same adhesion durability as that of Examples 1 to 8, The off time was able to be shortened than composition of ~ 8.
Also, Example 12 using an adhesion promoter before Step 3 has a slightly longer off time compared to Example 11 not used, but makes the gel nail's appearance better at the off point. It was possible.

  The composition according to the present invention can be used in combination with commercially available gel nails and the like, and it is possible not only to shorten the time taken to turn off in order to facilitate soak off while maintaining adhesion durability such as gel nails. , Damage to the nails can also be reduced. The composition according to the present invention is useful not only for nail salons and individual treatments such as gel nails, but also can be used to practice gel nails and the like because it facilitates the turning off of gel nails and the like.

Claims (1)

A film forming composition for nails, which is used as a spacer between artificial nails and own nails,
Containing a film forming component, a polymerizable monomer having a hydrophilic group, and a polymerization initiator in an organic solvent,
The film-forming component is a resin which is poorly soluble in water and soluble in organic solvents;
The concentration of the film-forming component is 8 to 55% by weight, the concentration of the polymerizable monomer is 2 to 30% by weight, and the concentration of the film-forming component is higher than the concentration of the polymerizable monomer. And a film-forming composition comprising only the resin selected from the group consisting of shellac, ethyl cellulose, rosin, benzoin gum and nitrocellulose as the film-forming component.