JP4608618B2 - Nail art solution - Google Patents

Description

  The present invention relates to a solution for nail art, and more particularly, by using the characteristics of the polyvinyl butyral resin solution, without using an environmental load and without using a solvent that is bad for nail health. The present invention provides a solution for nail art that does not tatter nails when peeled off.

Conventionally, nail art includes a type in which enamel is directly applied to the nail and a type in which the nail is applied to a temporary nail called an artificial nail and the artificial nail is adhered to the fingernail.
The direct application type is mainly based on acrylic resin with organic solvent added, and the artificial nail type is formed with polypropylene resin etc., and acrylic resin is applied to this. It is common.
However, in the above-mentioned direct application type, a highly volatile solvent such as thinner, acetate ester, acetone or toluene is used. Therefore, inhalation of air filled with the volatile solvent causes a symptom called sick house syndrome. Etc. may cause addiction symptoms.
In addition, when removing it after use, a solution called a light removing solution is used. However, since this also contains a volatile solvent such as thinner, the nail surface is damaged and the surface of the nail becomes tattered. The example that happens frequently occurs.
In addition, the artificial nail type decorates the artificial nail made of polypropylene resin, etc. and attaches it to the nail with double-sided tape, but the strong adhesiveness of the double-sided tape is difficult to peel off and is attached. In addition, there are disadvantages such as both the work of peeling and peeling become troublesome.
On the other hand, by using a water-based emulsion polymer as the film-forming component of the nail art composition as a conventional technique, it does not elute into the solvent-type nail enamel and is used in combination with two or more types of nail enamel such as topcoat and undercoat A proposal has been made to provide a nail art composition that can be dispersed and has good dispersion stability and usability of the color pigment (Patent Document 1).
However, since it is a water-based emulsion polymer, the time from application to drying is very long, so it is necessary to remain still without moving hands after application, which is extremely inconvenient.
JP 2001-187716 A

  Therefore, as a result of diligent research on this matter, the present inventors applied the characteristics of a butyral resin having a certain degree of butyralization, and had excellent coating film forming ability and easy peeling, and the solvent to be used was The aim is to develop a nail art solution that contributes to the maintenance of nail health without impacting the environment.

  In order to solve the above-mentioned problems, the nail art solution according to claim 1 comprises (1) polyvinyl butyral having a degree of butyralization of 60 to 85 mol% as a main component, and (2) the molecular weight of the polyvinyl butyral is expressed in terms of average polymerization degree. 500 to 2500, and (3) 25 to 150 parts by weight of at least one of the group consisting of triethylene glycol plasticizer, castor oil and epoxidized soybean with respect to 100 parts by weight of the polyvinyl butyral. (4) The ethanol solvent was mixed so that the total weight of the polyvinyl butyral added with the plasticizer was in the range of 10 wt% to 40 wt%.

  The nail art solution of the present invention is a butyral resin in which a hydrophilic part and a hydrophobic part coexist, and the coating film forming ability is excellent when the degree of butyralization is in the range of 60 to 85 mol%. Polyvinyl butyral has a glass transition temperature close to body temperature, and when applied to the nails, the body temperature propagates and approaches the transition temperature, ensuring flexibility and being optimal for nail art. On the other hand, when it is put in water, the part becomes hard, so that the adhesion is lowered and peeling becomes easy. That is, when the solution of the present invention is used as a nail art, the transition temperature is maintained by applying it to the nail, and the flexibility along the curved nail surface is ensured. It becomes possible to peel easily.

When the molecular weight of the polyvinyl butyral is in the range of 500 to 2500 in terms of the average degree of polymerization, there is no dripping phenomenon that the liquid flows under the nail, and the viscosity becomes appropriate when applied.

  If the plasticizer is any one of triethylene glycol plasticizer, castor oil, and epoxidized soybean, it has a safety that does not affect the environmental hormone system and forms a flexible coating film.

The amount of the plasticizer is 25 to 150 parts by weight with respect to 100 parts by weight of polyvinyl butyral. The more plasticizer is, the easier it is to apply with a decrease in viscosity. However, if it is excessive, the strength of the coating film when dried becomes weak and brittle, which is appropriate within the above range.

As the solvent, an alcohol solvent is used. The reason is that it has less environmental burden, has a bactericidal action, has no intoxication, and is highly safe compared to thinner and the like, and a plasticizer is added to the polyvinyl butyral. The total weight of the product becomes an appropriate amount in the range of 10 wt% to 40 wt%.

The resin as the main component of the nail art solution of the present invention is a butyral resin.
The butyral resin refers to polyvinyl butyral and is a resin having the following chemical structural formula.

Ｘ＝酢酸ビニル成分 Ｙ＝ビニルアルコール成分 Ｚ＝ビニルブチラール成分
即ち、ポリビニルブチラールは、親水性部となるビニルアルコール成分と、疎水性部となるビニルブチラール成分と、その中間の性質を有する酢酸ビニル成分との共重合体を形成するものである。その親水性部と疎水性部との割合を定めたものがブチラール化度であるが、
そのブチラール化度が６０〜８５mol%の範囲で塗膜形成能に優れ、且つ、その塗膜に柔軟性を付与できるネイルアートに最適なものとなる。即ち、ポリビニルブチラールはガラス転移温度が体温に近いので、爪に塗布していると体温が伝搬して転移温度に近づき、塗膜の柔軟性を確保し得る。一方、水の中に入れた場合には、その部位が硬くなるので、密着性が低下し、剥離を起こし易くなる性質を有する。
つまり、本発明溶液をネイルアートとして用いた場合、爪に塗布したことにより転移温度が保たれ、湾曲した爪面に沿う柔軟性を確保し、一方、使用後に剥離する場合には、水に浸すことで容易に剥離することが可能となる。
この性質をブチラール化度で特定した場合、６５mol%以下では親水性が高く、水に流れ易いものとなり、料理等で水を使うと流れてしまうという難点を残し、８５mol%以上では疎水性が強くなり、アルコール溶剤に溶けにくく、密着性、柔軟性に欠けるものとなり、その結果、６５〜８５mol%の範囲において最適な特性を維持したものとなる。

X = Vinyl acetate component Y = Vinyl alcohol component Z = Vinyl butyral component That is, polyvinyl butyral is a vinyl acetate component having a property intermediate between a vinyl alcohol component serving as a hydrophilic portion and a vinyl butyral component serving as a hydrophobic portion. To form a copolymer. What determined the ratio of the hydrophilic part and the hydrophobic part is the degree of butyralization,
When the degree of butyralization is in the range of 60 to 85 mol%, the coating film forming ability is excellent, and the nail art that can impart flexibility to the coating film is optimal. That is, since the glass transition temperature of polyvinyl butyral is close to the body temperature, when applied to the nail, the body temperature propagates and approaches the transition temperature, and the flexibility of the coating film can be secured. On the other hand, when it is put in water, the part becomes hard, so that the adhesiveness is lowered, and peeling tends to occur.
That is, when the solution of the present invention is used as a nail art, the transition temperature is maintained by applying it to the nail, and the flexibility along the curved nail surface is ensured. It becomes possible to peel easily.
When this property is specified by the degree of butyralization, it is highly hydrophilic at 65 mol% or less and easily flows into water, leaving the difficulty of using water in cooking etc., and having a high hydrophobicity at 85 mol% or more. Therefore, it is difficult to dissolve in an alcohol solvent and lacks adhesion and flexibility, and as a result, optimum characteristics are maintained in the range of 65 to 85 mol%.

Next, the range of the average degree of polymerization suitable for nail art in the above-mentioned butyral resin having a degree of butyralization of 60 to 85 mol% was examined. For those having an average degree of polymerization of 500 or less, fluidity is too high and dripping easily occurs. For example, when applied to a raised convex nail at the center, it flows downward. On the other hand, when the average degree of polymerization is 2500 or more, the coating film becomes tough, but the viscosity becomes too high and it is extremely difficult to apply at the time of application.
As a result, it becomes suitable in the range of 500-2500 by the average polymerization degree display of the said polyvinyl butyral.

いずれも流動性を出して塗り易さを増す点では合格であるが、しかし、フタル酸系エステル、アジピン酸系エステルは内分泌攪乱化学物質（環境ホルモン）であり、爪等の人体の一部に触れさせることは危険性が大であり対象外とした。ひまし油、エポキシ化大豆油は乾燥後の表面に艶がないが、ニス等の上塗りにより、ネイルアート剤として用いることができる。これに対し、トリエチレングリコール系エステルは、それ単独で艶々と美しい輝きを放って最適である。 Next, when the kind of plasticizer for the butyral resin was examined, the results shown in Table 1 were obtained.

Both are acceptable in terms of increasing fluidity and ease of application, but phthalic acid esters and adipic acid esters are endocrine disrupting chemicals (environmental hormones) and are part of the human body such as nails. Touching it was dangerous because it was dangerous. Castor oil and epoxidized soybean oil do not have a glossy surface after drying, but can be used as a nail art agent by overcoating with varnish or the like. On the other hand, triethylene glycol ester is optimal by itself with a glossy and beautiful shine.

Next, the optimum amount of the plasticizer was examined.
When the amount of plasticizer is expressed as a percentage relative to polyvinyl butyral, the lower limit is 80:20 and the upper limit is 40:60.
The more plasticizer is, the easier it is to apply with a reduced viscosity. However, if it is excessive, the strength of the coating film when dried becomes weak and brittle.
As a result, a suitable plasticizer amount is 25 to 150 parts by weight with respect to 100 parts by weight of polyvinyl butyral. This is because if the lower limit value is 25 parts by weight or less, the viscosity is high and lacks fluidity, and if the upper limit value is 150 parts by weight or more, the viscosity is too low and dripping occurs.

エタノール及びミックスエタノールに限定するものとなった。そのわけは、シンナー、酢酸エステル、アセトン、トルエン系等では、環境汚染や中毒及び脱脂作用による爪の損傷が惹起されるからである。従って、本発明でいうエタノール溶剤には、ミックスエタノールを含むものである。
その適量は、該ポリビニルブチラールに可塑剤を加えたものの総重量が１０ｗｔ%〜４０ｗｔ%の範囲で、１０ｗｔ％以下では、粘度が低すぎて塗りづらく、一方、４０ｗｔ％以上では塗る際に延びがなく、作業のしづらいものとなるからである。 Furthermore, the kind of solvent which should dissolve | melt this with respect to the butyral resin which mixed the said plasticizer was examined.
The results are shown in Table 2.

Limited to ethanol and mixed ethanol. This is because thinner, acetate, acetone, toluene, etc. cause nail damage due to environmental pollution, poisoning and degreasing. Accordingly, the ethanol solvent referred to in the present invention includes mixed ethanol.
The appropriate amount is such that the total weight of the polyvinyl butyral added with a plasticizer is in the range of 10 wt% to 40 wt%, and if it is 10 wt% or less, the viscosity is too low to be applied. This is because the work is difficult.

The main component is polyvinyl butyral having a butyralization degree of 79 mol%, the molecular weight of the polyvinyl butyral is 2000 in terms of average polymerization degree, and a triethylene glycol plasticizer is mixed in an amount of 45 parts by weight with respect to 100 parts by weight of the polyvinyl butyral. And the ethanol solvent was mixed so that the total weight of what added the plasticizer to this polyvinyl butyral might be the range of 15 wt%, and the solution for nail art was obtained.
(For false nails)
An artificial nail was placed on the fixing support device to which the double-sided tape was applied, and adhered and fixed. The nail art solution was blended with a pigment of a favorite color, and brushed uniformly along the direction from the base of the artificial nail to the tip. At that time, pay attention to dripping, uneven coating, and thick coating. If anything, the dark color system may be overcoated, but the light color system is a single coating. With the coated surface being semi-dry, a favorite topping decoration such as beads was placed on the desired location using tweezers and pasted. When the coated surface was dry, a top coat solution (pointing to a nail art solution containing no pigment) was applied with a brush in the same manner as described above in order to protect the coating film and prevent the topping ornament from peeling off. Care was taken to prevent dust from adhering, and it was dried in the shade. Using the top coat solution as an adhesive, the nails could be attached to the nails.
As a result, when applied to the nail, flexibility along the curved nail surface was ensured, and when applied, there was no dripping and the viscosity was easy to apply. Furthermore, there was almost no smell and it was comfortable. It was glossy, colorful, and not inferior to a commercial product.

(For nails)
The nail art solution was blended with a pigment of the desired color, and brushed uniformly along the direction from the base of the nail to the tip. At that time, pay attention to dripping, uneven coating, and thick coating. If anything, the dark color system may be overcoated, but the light color system is a single coating. With the coated surface being semi-dry, a favorite topping decoration such as beads was placed on the desired location using tweezers and pasted. The drying of the coated surface is preferably air drying, but the dryer air was used to shorten the drying time. When the coated surface was dry, a top coat solution (pointing to a nail art solution containing no pigment) was applied with a brush in the same manner as described above in order to protect the coating film and prevent the topping ornament from peeling off. And it was made to dry with the wind of a dryer.
As a result, when applied to the nail, flexibility along the curved nail surface was ensured, and when applied, there was no dripping and the viscosity was easy to apply. Furthermore, there was almost no smell and it was comfortable. It was glossy, colorful, and not inferior to a commercial product. In addition, after use, it can be easily peeled off by immersing it in water, and no light removing liquid is required.

  The present invention is applied to nail art solutions such as nails and false nails.

Claims (2)

(1) Mainly polyvinyl butyral having a butyralization degree of 60 to 85 mol%,
(2) The molecular weight of the polyvinyl butyral is in the range of 500 to 2500 in terms of average polymerization degree,
(3) To 100 parts by weight of the polyvinyl butyral , tri (ethylene glycol) bis (2-ethylhexanoate) as a plasticizer is mixed in a range of 25 to 150 parts by weight,
(4) An ethanol solvent was mixed so that the total weight of the polyvinyl butyral added with tri (ethylene glycol) bis (2-ethylhexanoate) as a plasticizer was in the range of 10 wt% to 40 wt%.
A nail art solution characterized by the above. The nail art solution according to claim 1 , wherein an appropriate amount of pigment is added.