KR20120049078A - Uv protecting foundation cosmetic composite containing hybrid titanium dioxide composites - Google Patents

Abstract

PURPOSE: A foundation cosmetic composition containing hybrid titanium dioxide is provided to ensure skin stability and light stability. CONSTITUTION: A foundation cosmetic composition contains 2.0-20.0 wt% of hybrid titanium dioxide of chemical formula 1 containing pre-polymers and polyurethane polymers; 0.1-5.0 wt% of pigment, 0.5-5.0 wt% of emulsifier, and 5-30 wt% of oil ingredients. The pre-polymer is formed by silylation of surface-modified titanium dioxide. The polyurethane polymer is a hard segment prepared by urethane reaction of polydimethyl siloxane(PDMS) with toluene-2,4-diisocyanate(TDI) or hexamethylene-1,6-diisocyanate(HDI) by urethane reaction.

Description

Foundation cosmetic composition containing hybrid titanium dioxide {UV protecting Foundation cosmetic composite containing hybrid titanium dioxide composites}

The present invention relates to a foundation cosmetic composition, and in particular, to improve the rough feeling of titanium dioxide itself by using titanium dioxide surface modification to improve the dispersibility and light stability of the pigment in water-in-oil foundation cosmetic composition (for UV protection) It is about.

The composition of the foundation is commonly used to conceal beautiful color expression and skin blemishes on the face. That is, when foundation is applied to the skin, it should be applied softly and lightly, it has excellent skin adhesion and make-up effect, there should be no shine after time elapse, and stability for skin should be maintained.

Looking at the function of make-up cosmetics, it has the function of covering up the concealment of the skin, concealing and imparting beautiful color, that is, beautifying the skin, nourishing the skin, converging effect, moisturizing function, protecting the skin from UV rays, etc. There is a function to protect, and furthermore has a function to give psychological stability by skin beautification and skin protection function.

General requirements for make-up cosmetics include ① natural color expression, ② excellent adhesion and sustainability, ③ good feel, ④ excellent safety in addition to the ability to prevent clumping and discoloration of makeup ⑤ excellent safety There are various conditions that must be done.

Typically, emulsified cosmetic composition forms are largely classified into oil in water (O / W) and water in oil (W / O). The oil-in-water type (O / W) is the most commonly used cosmetic composition because it is light in appearance and easy to manufacture and has excellent dispersion stability. However, in the case of makeup cosmetics, it is used to secure the long-term stability of cosmetics. Absorption is slow and sticky due to the thickener, which in some cases may have a skin irritation due to the emulsifier.

Materials having excellent functions of concealing skin defects, such as titanium dioxide and zinc, will cause re-agglomeration and cause agglomeration after makeup. In particular, in the case of titanium dioxide, the structure is tetrahedral, which damages the skin when applied to the skin, and the malleability is very bad, which causes deterioration in usability.

Excellent softness and spreadability as well as excellent adhesion and durability, and also the property that color does not change by sebum, moisture, etc., ie color-consistency and oil absorption ability of powders After makeup, it is required to have properties such as preventing bleeding and makeup drift.

Inorganic sunscreens mainly have an ultraviolet ray blocking effect by scattering ultraviolet rays. As representative inorganic sunscreens, TiO ₂ , CeO ₂ , ZnO, and ZrO ₂ , which are metal oxides having a high refractive index, are used. Among these, TiO ₂ is relatively low cost and very high refractive index, but is often used such a powerful UV capabilities of a (2.5) reasons, the primary particles (nano size) by the TiO ₂ own bad skin texture and strong mutual cohesion of their By agglomerating with each other, secondary particles (micro size) are produced, and there is a problem in use that the skin adhesion and the sunscreen effect are sharply lowered.

Therefore, various studies on emulsification of TiO ₂ particles have been conducted to prevent the aggregation of TiO ₂ , but there are many problems in maintaining product stability when TiO ₂ particles are blended into the finished cosmetic product. In order to solve such problems when using TiO ₂ in cosmetics, in the present invention, by uniformly coating or impregnating TiO ₂ on the outside of the organic or inorganic powder, the TiO ₂ particles are prevented from agglomeration between each other and have excellent skin feel. And a method for producing a composite powder having skin adhesion and high UV blocking ability.

Fine uniform nanoscale TiO ₂ to TiO ₂ by hydrolysis of the titanium alkoxide gel method An attempt has been made to coat the base material surface, the conventional inorganic powder and TiO _2, or an organic resin other than a simple mixing method of TiO _2, sol Due to the coating on the substrate and the secondary aggregation of the TiO ₂ particles produced, there was a limit in that the transparency, skin feel, skin adhesion, and ultraviolet shielding effect were not substantially improved compared to the simple mixing of the substrate and TiO ₂ . .

The present invention has been derived to solve the above problems, the technical problem to be solved by the present invention is to compensate for the disadvantages of inorganic ultraviolet blockers such as titanium dioxide and further highlight the advantages as a sunscreen surface modification and property modification Through the use of the hybrid titanium dioxide through to provide an inorganic sunscreen excellent in dispersibility and light stability, and to provide a water-in-oil type foundation cosmetic composition excellent in use.

As a means for solving the above problems, the present invention, a pre-polymer and a polyurethane polymer hybridized with a silica-coated surface-modified titanium dioxide (N-silylated) coated with silica as an inorganic UV blocker (Hybridization) A hybrid titanium dioxide having a structure of Formula 1 below; Pigment 0.1-5.0 wt%; 0.5 to 5.0 wt% emulsifier; And it provides a foundation cosmetic composition comprising 5 to 30% by weight of the oil component.

(Formula 1)

The prepolymer may be formed by surface-modified titanium dioxide silylated with 3-aminopropyltriethoxysilane (APTES), and the polyurethane polymer may include polydimethylsiloxane (PDMS) as toluene- as a soft segment. It may be a hard segment formed through a urethane reaction with 2,4-diisocyanate (TDI) or hexamethylene-1,6-diisocyanate (HDI).

In addition, the present invention may further comprise titanium dioxide coated with methicone in general (Korea Synthetic Pearl SI-T-CR50 (80% LHC product), with respect to 100 parts by weight of the hybrid titanium dioxides, methicone) By mixing the coating tube titanium dioxide and hybrid titanium dioxide may be a foundation cosmetic composition with a feeling of use and excellent sunscreen.

Meanwhile, the present invention may be a cosmetic composition including the hybrid titanium dioxide, and further comprising other components such as fragrance, moisturizer, and generally coated titanium dioxide suitable for formulation suitability.

According to the present invention, due to the surface modification of the inorganic sunscreen to compensate for the phenomenon that the whitening of the white lifting phenomenon occurs when applying the skin due to the high refractive index of the general inorganic sunscreen, and the unpleasant feeling when using the skin due to the aggregation properties of these inorganic blockers It improves the compatibility and can give synergistic effect of UV protection through light stability.

In addition, it is possible to provide a water-in-oil type foundation cosmetic composition excellent in dispersibility and light stability of the pigment by improving the rough feeling of the titanium dioxide itself. In particular, due to the modification of the surface of the inorganic powder of titanium dioxide and the characteristics of the hybrid titanium dioxide having a soft and hard segment, it has excellent skin stability and light stability, and when produced by further including other sunscreens, a boosting effect of the sunscreen is obtained. Can be.

1 is a view showing a schematic diagram for producing a hybrid titanium dioxide used in the present invention.

Hereinafter, embodiments, tables, and drawings will be described in detail so that those skilled in the art may easily and repeatedly reproduce the present invention.

The present invention, as an inorganic UV blocker, is formed by the hybridization of a pre-polymer and a polyurethane polymer formed by N-silylated titanium dioxide coated with silica to the surface-modified (1) 2.0 to 20.0 wt% of a hybrid titanium dioxide having a structure of; Pigment 0.1-5.0 wt%; 0.5 to 5.0 wt% emulsifier; And it provides a foundation cosmetic composition comprising 5 to 30% by weight of the oil component.

(Formula 1)

The term “hybrid titanium dioxide” used in the present invention means an inorganic sunscreen agent having the same structure as in Chemical Formula (1), and is used in the same sense below.

FIG. 1 illustrates a process of synthesizing the hybrid titanium dioxide, which will be described below with reference to FIG. 1.

The hybrid titanium dioxide is subjected to N-Silylation with 3-aminopropyltriethoxysilane (APTES) on titanium dioxide coated with silica to synthesize a primary backbone for the urea reaction later on an inorganic UV blocker and free radicals through photoreaction. It inhibits the photolysis reaction of titanium dioxide to form.

Generally, soft segment such as polydimethylsiloxane (PDMS) is an oil that is widely used as a raw material for cosmetics and has a low viscosity fluidity and low surface tension, so that wetting property on the skin is excellent and a uniform film is formed. For the purpose of improving compatibility with the modified silicone such as polymethyl hydrosiloxane containing phenyl group is used as a raw material for cosmetics. This gives a hard segment through a urethane reaction with a material such as toluene-2,4-diisocyanate (TDI) or hexamethylene-1,6-diisocyanate (HDI) to form a polyurethane polymer, resulting in skin stability compared to existing materials. It alleviates the problem of whitening and whitening and improves usability problems.

The polyurethane polymer formed above forms a titanium dioxide compound through N-silyation material prepared above and hybridization, and then crosslinks a moisturizing agent such as 1,3 butylene glycol or glycerin to increase fluidity and handling compatibility.

As one of the present invention, the hybrid titanium dioxide may be freely used without additional treatment to prepare a cosmetic composition for UV protection.

The hybrid titanium dioxide preferably has 3.0 to 10.0% by weight with respect to the component ratio of the foundation cosmetic composition, there is a problem that little effect less than 3.0% by weight, there is a stability problem when it exceeds 10% by weight In that respect, the numerical value is meaningful.

The pigment is preferably any one of iron oxide, alumina, talc, mica, silica, titanium dioxide, or polyethylene powder, or a mixture of two or more thereof, and has a 3.0 to 10.0% by weight relative to the component ratio of the foundation cosmetic composition. desirable. If it is less than 3.0% by weight, there is a problem that the effect is insignificant, and if it exceeds 10% by weight, there is a numerical limitation in that there is a stability problem.

The emulsifier is Fiji / Fiji-19 / 19 Dimethicone, Lauryl Fiji-9 Polydimethylsiloxyethyldimethicone, Dimethicone / vinyldimethicone crosspolymer, 1,3-butylene glycol, Polysorbate 60 , Polysorbate, glyceryl stearate, sorbitan sesquioleate, sorbitan stearate, Fiji-10 dimethicone or sorbitan oleate, any one or a mixture of two or more thereof, the foundation cosmetic composition It is preferable to have 0.5 to 5.0% by weight with respect to the component ratio of. If the amount is less than 0.5% by weight, there is a problem in that emulsification is not possible, and if it exceeds 5.0% by weight, there is a problem in that the feeling of use becomes stiff and the viscosity rises.

The oil component is one of hexyl laurate, cyclomethicone, or dimethicone, or a mixture of two or more thereof, and preferably has 5.0 to 30.0% by weight with respect to the component ratio of the foundation cosmetic composition. If the amount is less than 5.0% by weight, there is a problem that the effect is insignificant, and if it exceeds 30.0% by weight, the lactation phase is easily separated and there is a problem in that the stability is not good.

In connection with the components of the present invention, by utilizing the surface modification in the inorganic powder of titanium dioxide, it is possible to improve the rough feeling with excellent skin stability and light stability and excellent UV protection effect by soft and hard sefment.

In addition, due to the components of the hybrid titanium dioxide containing poly (urethane / urea) nano components, it is possible to provide an inorganic sunscreen having excellent dispersibility and light stability, and because it uses the molecular properties of soft and hard segments, It can express the boosting effect of securing and UV blocking ability.

< hybrid Of titanium dioxide  Manufacture

To 50 g of polydimethylsiloxane (PDMS), 8.4 g of hexamethylene diisocyanate (HDI) was PREMIXING for 30 minutes under 40 ° C. nitrogen atmosphere, and then 0.005 g of catalyst DBTDL (Dibutyl Tin Dilaurate) was added thereto, followed by reaction at 40 ° C. for 4 hours. A PU_NCO (polyurethane-NCO) compound with NCO is made. The main chain was extended by adding 3.5 g of 1,3-butylene glycol to the PU-NCO compound, thereby preparing a polyurethane / urea having an extended main chain having NCO at the terminal.

In another process, the prepolymer was coated with 0.4 g of 3-aminopropyltriethoxysilane (APTES) and silica, and 10 g of titanium dioxide was subjected to reflux stirring for 4 hours under an acid catalyst, filtered, and washed with water. To prepare. The final drying time of the linear polymer obtained through the silylation reaction is obtained by carrying out for 5 hours at a temperature of 150 ℃.

The silylated prepolymer of the prepared polyurethane / urea compound and silica-coated titanium dioxide is prepared through a reaction process at 50 to 70 ° C. for about 3 hours to prepare a hybrid titanium dioxide.

< hybrid Titanium dioxide  Foundation to include Cosmetics  Preparation of the composition>

Including the hybrid titanium dioxide prepared by Example 1, to prepare a cosmetic composition for blocking the sun through the composition shown in Table 1.

Raw material name Comparative Example 1 Example 2 Example 3 Example 4 1. Purified water Quantity Quantity Quantity Quantity 2. 1,3-BG 5.0 5.0 5.0 5.0 3. General Coated TiO2 7.0 7.0 - 3.0 4. Hybrid TiO2 - 5.0 14.0 5.0 5. Iron Oxide Quantity Quantity Quantity Quantity 6. Talc 1.0 1.0 1.0 1.0 7. Cyclomethicone 10.0 10.0 10.0 10.0 8. Fiji / Fiji-19 / 19 Dimethicone 3.0 3.0 3.0 3.0 9. Lauryl Fiji-9 Polydimethylsiloxyethyldimethicone 1.0 1.0 1.0 1.0 10. Dimethicone / Vinyl Dimethicone Crosspolymer 5.0 5.0 - 3.0 11.Dimethicone 3.0 3.0 3.0 3.0 12. Incense 0.1 0.1 0.1 0.1

<Manufacturing Method>

(1) The raw materials No. 2, 5, and 6 were weighed out and crushed twice with an atomizer (HEUNG-BO INDUSTRY CO.LTD).

(2) Raw material No. 4 was added and stirred and mixed with an AGI MIXER (Matsushita Electric Industial Co. Ltd, SER No 515, Japan).

(3) The mixture was stirred and mixed while slowly adding an aqueous phase to emulsify (Mitsabosa LR-1).

* Titanium dioxide was used in Korea Synthetic Pearl SI-T-CR50 (80%) LHC (trade name).

* Cyclomethicone / Dimethicone Dimethicone / Vinyl Dimethicone Crosspolymer was used by Kolim Co., Ltd. product (trade name).

Evaluation of the feeling for the foundation cosmetic composition prepared in Examples 2 to 4 and Comparative Example 1 was performed, the results are shown in Table 2 below.

< Test Example  1> Feeling  evaluation

Test Items Comparative Example 1 Example 2 Example 3 Example 4 Coverage 3 5 2 4 Spreadability 2 4 5 4 Softness 2 4 5 4 Finish 3 4 2 5 Synthesis 2.5 4.2 3.5 4.2 Very bad: 1, Bad: 2, Moderate: 3, Good: 4, Very good: 5

* Review was conducted on 20 women aged 20 to 30 years.

As shown in the results of Table 2, the water-in-oil foundation prepared according to the present invention had a softer use than the surface-modified titanium dioxide when the surface-modified titanium dioxide was contained, but it was not good for the cosmetic effect of the finish. You may get poor results.

When a suitable amount of surface modified titanium dioxide and unmodified titanium dioxide are mixed, it can be seen that the best usability and finish, particularly softness and adhesion are excellent.

UV protection index measurement test for the foundation cosmetic composition prepared in Examples 2 to 4 and Comparative Example 1 was carried out, the results are shown in Table 3 below.

< Test Example  2> UV protection index measurement

In vitro UV protection index (SPF) evaluation of the Comparative Example 1, Examples 2, 3, 4 was performed.

Samples were applied to a Transpore tape at a level of ² μm / cm ² , dried for 15 minutes and measured with an SPF290 analyzer (Analyer, Optometrics, USA). The experiments were averaged three times and the results are as follows.

Test Items Comparative Example 1 Example 1 Example 2 Example 3 SPF Index 20.5 26.3 22.3 24.4

As shown in the results, the UV blocking index (SPF) was the highest in Example 1, and it was found that the surface modification treatment was excellent in the UV blocking effect.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

Claims (5)

As an inorganic ultraviolet blocker, a structure of formula (1) is formed by hybridizing a pre-polymer and a polyurethane polymer formed by coating a silica-modified titanium dioxide with N-silylation. Hybrid titanium dioxide having 2.0 to 20.0 wt%; Pigment 0.1-5.0 wt%; 0.5 to 5.0 wt% emulsifier; And a foundation cosmetic composition comprising 5 to 30% by weight of an oil component.
(Formula 1)

The method of claim 1,
The prepolymer is a foundation cosmetic composition, characterized in that the surface-modified titanium dioxide formed by silylated with 3-aminopropyltriethoxysilane (APTES).
The method of claim 1,
The polyurethane polymer is a hard segment formed through a urethane reaction of polydimethylsiloxane (PDMS) with toluene-2,4-diisocyanate (TDI) or hexamethylene-1,6-diisocyanate (HDI) as a soft segment. Foundation cosmetic composition, characterized in that.
The method of claim 1,
The pigment is any one of iron oxide, alumina, talc, mica, silica, titanium dioxide, or polyethylene powder or a mixture of two or more thereof,
The emulsifier is Fiji / Fiji-19 / 19 Dimethicone, Lauryl Fiji-9 Polydimethylsiloxyethyldimethicone, Dimethicone / vinyldimethicone crosspolymer, 1,3-butylene glycol, Polysorbate 60 , Polysorbate, glyceryl stearate, sorbitan sesquioleate, sorbitan stearate, fiji-10 dimethicone or sorbitan oleate, or a mixture of two or more thereof,
The oil component is hexyl laurate, cyclomethicone or dimethicone any one or a mixture of two or more of these, the foundation cosmetic composition.
The method of claim 1,
Foundation cosmetic composition, characterized in that it further comprises 50 to 200 parts by weight of coated titanium dioxide, based on 100 parts by weight of the hybrid titanium dioxides.

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