JP2007106711A - Cosmetic material for forming duplicated eyelid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ideal cosmetic material for forming a duplicated eyelid without troubles such as discoloration, separation of a latex component, onset of allergy and the like. <P>SOLUTION: The cosmetic material for forming the duplicated eyelid contains at least ≥50/w% synthetic latex in the whole latex component. Thus, sufficient adhesiveness is provided. The content of impurities such as proteins and the like is very small even though a natural rubber latex is included, so when discoloration occurs, it will be in a range of practical allowance and there is no separation of rubber particles from serum liquid. As the cosmetic material contains no allergic materials, it can be used without anxiety. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  It is an object of the present invention to provide an ideal double wrinkle-forming cosmetic that is free from dangers such as discoloration, separation of latex components, and allergy development.

  As a means for forming a double fold, a double fold forming tape in which a tape made of a film is attached to form a double fold is already known (see Japanese Patent Application Laid-Open No. 10-304935). Recently, cosmetics for forming simple double wrinkles have been developed.

Examples of such cosmetics include polymer compounds having film forming ability such as acrylic acid ester / methacrylic acid ester copolymers and vinyl acetate / crotonic acid copolymers, amino group-containing polysiloxanes and anionic polymers. A silicone-modified polymer of a composite polymer obtained by neutralizing the reaction product of the above with an alkaline compound, and ethyl alcohol mainly functioning as a solvent for the silicone-modified polymer, and having the above-mentioned film-forming ability. By making the blending weight ratio of the ethyl alcohol component with respect to the molecular compound 0.1 to 10.0, a cosmetic that has excellent elasticity and durability of the film and has no unpleasant feeling of use such as stickiness has been proposed. (See JP-A-11-171728).
Japanese Patent Laid-Open No. 10-304935 JP-A-11-171728

  However, there is a problem in that the tape to which the tape is attached is not flexible enough to easily cause pulling in the eyes during use, and it is difficult to go out during use. Furthermore, cosmetics in which the blending ratio of the polymer compound having film-forming ability and the silicone-modified polymer is specified are time-consuming to manufacture and are not necessarily suitable for general use.

  The cosmetics for forming double wrinkles currently on the market use natural rubber latex with excellent adhesiveness and peelability as a double wrinkle cosmetic as the main component of the binder, but the adhesive strength is not always sufficient. In addition, it is necessary to add another adhesive resin, and the contained impurities are oxidized with time by a slight amount of oxygen in the container to turn yellow, and the color change is promoted by external light.

  Furthermore, natural rubber latex is a colloidal dispersion of rubber particles with a specific gravity of about 0.83 for serum with a specific gravity of about 1.0. Separation is delayed to some extent, but when used as a double wrinkle-forming cosmetic, the brown motion of the particles described above is hindered due to the need to increase the viscosity for the purpose of improving the feeling of use, and a long time Separation between the serum and the rubber particles tends to occur by standing. Separation in this case can be eliminated relatively easily by stirring at the beginning, but then increases irreversibly, and therefore increases aesthetic discomfort when used as a double wrinkle-forming cosmetic. Many.

  Natural rubber latex has been confirmed to be allergic, and depending on the user's constitution, it may cause a severe anaphylactic shock accompanied by severe shock symptoms due to antigen-antibody reaction from the onset of mild allergic symptoms. For this reason, cosmetics containing a natural rubber latex component cannot be used by allergic individuals.

  Therefore, as a result of various studies on the above-mentioned discoloration, separation of serum and rubber particles, and allergic problems as cosmetics for forming double wrinkles, we have surprisingly found that synthetic latex is suitable for this. Synthetic latex is derived from petroleum, has high purity, and does not contain any proteins that cause allergies. Furthermore, the present inventors completed the present invention by ascertaining that a modified SBR latex that is most excellent in terms of suitable binder properties and peelability is preferable as a cosmetic for forming double wrinkles among synthetic latexes.

  That is, the present invention comprises at least 50 / w% or more of a latex component of a latex, more preferably a styrene-butadiene latex, and if necessary, a film forming agent, a thickener, a preservative, water, Alternatively, a double wrinkle-forming cosmetic characterized in that one or more of auxiliary agents such as a fragrance and a moisturizer are added.

  As described above, since the present invention includes at least 50 / w% or more of the latex component of the synthetic latex, sufficient adhesion can be obtained, and even if natural rubber latex is included, the content of the impurity component Therefore, it is within the range where there is no problem in practical use even if the color changes, and there is no separation of serum and rubber particles, and it does not contain allergenic substances, so it can be used with peace of mind. it can.

  In the following, the specific contents of the present invention will be described based on examples, and the present invention will be described with reference to latex and film forming agents, thickeners, preservatives, water, fragrances, moisturizers and the like added thereto. In the double wrinkle cosmetic comprising an agent, at least 50 / w% or more of the latex component described above is occupied by synthetic latex.

  Latex is a NR latex (natural latex), which is a natural product produced by the metabolic action of plants (Hevea brasiliensis tree), a synthetic latex synthesized by emulsion polymerization, and a solid rubber emulsified and dispersed in water. It is classified into three types of phase latex, and is further classified into SBR, BR, NBR, CR, IR latex, etc., depending on the type of polymer dispersed.

  Synthetic latex has excellent impact resistance and cold resistance, for example, BR used as a base polymer for ABS resin, NBR used for fiber treatment, gloves, etc. with excellent oil resistance and adhesion, and excellent workability In addition, CR is used in impregnated and elastic cements because of the good balance of physical properties of the cross-linked product and good oil resistance, weather resistance, flame resistance, and chemical resistance. Furthermore, vinylpyridine for fiber treatment of tire cords. There are IR and the like used for latex and rubber thread for golf balls.

  Further, among the above-mentioned synthetic latexes, SBR (styrene butadiene) latexes have characteristics such as adhesion to pigments, smoothness, thermoplasticity for obtaining gloss, and hydrophobicity for obtaining water resistance. It is versatile and has been used mainly in the field of paper processing such as calendars and wrapping paper.

  Among these SBR latexes, SBR latex such as styrene / butadiene copolymer or carboxylated styrene / butadiene copolymer, which is modified by carboxyl group or triethoxysilyl group, Forming double wrinkles to be used near the eyes because it has excellent ability and is not a very hard film, it can be peeled relatively easily when peeled while having sufficient adhesive strength during use, and it is not irritating The results of various experiments revealed that it is ideal when used as a cosmetic material for sewage.

  Furthermore, when various experiments were conducted on the ratio of the latex component in the latex component, the amount of natural latex was too small at less than 50 / w%, and the color was changed by the contained protein, and separation of the latex component was inevitable. It was found that it was difficult to obtain a sufficient adhesive force. In addition, if it is 50 / w% or more, the total amount of latex components (100 / w%) may be occupied by synthetic latex, as well as in terms of discoloration, separation, adhesiveness, ease of peeling, non-irritating, etc. It turned out to be very good.

  Further, as an auxiliary agent, one or more of auxiliary agents such as a film forming agent such as an acrylic resin, a thickener, an antiseptic, water, or a fragrance or a humectant are added as necessary. In addition, some synthetic latex rarely accompanies a trace amount of component separation, but in this case, it can be easily solved by adding a thickener such as carbomer, thickening polysaccharide, or PVP.

  The following four types of double wrinkle-forming cosmetics were prepared as samples, and modified styrene-butadiene copolymer latex (Nippon Zeon Corporation, product name: LX426) was used as a synthetic latex for samples (2) to (4).

〔sample〕
(1) Double wrinkle-forming cosmetics obtained by adding auxiliary agents such as film forming agents, thickeners, preservatives, water, fragrances, moisturizers, etc. to 100 / w% natural latex (2) Synthetic latex 45 / w among latex components %, The rest is natural latex, and a film forming agent, thickener, preservative, water, fragrance, moisturizer and other auxiliary agents are added. (3) Synthetic latex 55 / w among latex components %, The rest is natural latex, and a film forming agent, thickener, preservative, water, fragrance, moisturizer and other auxiliary agents are added. (4) Synthetic latex among latex components %, The rest is natural latex, and the above four types of double wrinkle-forming cosmetics are prepared by adding auxiliary agents such as film forming agents, thickeners, preservatives, water, fragrances, and moisturizers. To each sample Stomach tried to female monitor of each 20 people.

The results were as follows:

(Discoloration) (Separation) (Adhesive strength) (Easily peelable) (Irritation)
Sample (1) × △ △ △ △
Sample (2) △ ○ △ △ ○
Sample (3) ○ ○ ○ ○ ○
Sample (4) ◎ ◎ ◎ ◎ ◎

[× = defect △ = some difficulty ○ = good ◎ = optimal]

  As is clear from the above results, among the latex components, those having a synthetic latex of less than 50 / w% (Samples 1 and 2) are not only easily discolored but also have overall difficulties and poor practicality. Of the latex components, those having a synthetic latex of 50 / w% or more (samples 3 and 4) were found to have a sufficiently satisfactory function for each test item.

Claims (2)

  It contains at least 50 / w% or more of synthetic latex among the latex components, and further, if necessary, a film forming agent, a thickener, an antiseptic, water, or one or two of auxiliary agents such as a fragrance and a moisturizing agent. A double wrinkle-forming cosmetic characterized by adding more than seeds. The double wrinkle-forming cosmetic according to claim 1, wherein the synthetic latex is a styrene-butadiene latex.