HK1187272B - Cosmetics comprising cosmetic composition-impregnated urethane foam - Google Patents

Description

Cosmetic product comprising polyurethane foam impregnated with cosmetic composition

[ technical field ] A method for producing a semiconductor device

The present invention relates to polyurethane foams for use in impregnating cosmetic compositions.

[ background of the invention ]

In the past, cosmetic compositions have been used primarily indoors. However, recently, as leisure activities have been generalized, and modern lifestyles have been changed accordingly, cosmetic compositions have been frequently used outdoors. In particular, in the past, UV-protective cosmetic compositions have been used mostly in summer. However, when modern people enjoy outdoor activities and recognize the hazards of ultraviolet rays, there is a trend toward UV-protective cosmetic compositions that are frequently used in all seasons in addition to summer. Therefore, there is a further need for cosmetic compositions that are convenient to use and easy to carry.

Polyester-based polyurethane foams were occasionally developed by the german technical specialist in the late nineteenth forty years, during which the development of plastic materials was in progress. Since the polyurethane foam is based on polyester, it is also referred to as ester foam. The preparation of such polyurethane foams does not require advanced technology. Therefore, polyurethane foams based on polyesters have been widely manufactured and used in various industrial fields, especially in fields requiring strong tensile force.

However, polyester-based polyurethane foams tend to crack easily in wet environments. In addition, it has a microporous structure and low air permeability, and thus exhibits low soft feel, flexibility and pliability. As a result, polyurethane foams based on polyesters are not suitable for impregnating cosmetic compositions, in particular not liquid cosmetic compositions. Under these circumstances, there is an urgent need to develop polyurethane foams suitable for impregnating cosmetic compositions.

[ disclosure ] to

[ problem ] to provide a method for producing a semiconductor device

The present disclosure is directed to providing a polyurethane foam for use in impregnating a cosmetic composition, which is capable of maintaining high stability of the impregnated cosmetic composition and high stability after impregnation.

[ technical solution ] A

In one general aspect, polyether-based polyurethane foams for use in impregnating cosmetic compositions are provided.

[ PROBLEMS ] the present invention

The polyether-based polyurethane foam disclosed herein maintains high stability even after impregnation with a cosmetic composition, and improves portability and feel of the cosmetic composition.

[ description of the drawings ]

FIG. 1 is a microscopic view of a wet polyether-based polyurethane foam;

FIG. 2 shows a packaged cosmetic product in which a polyurethane foam impregnated with a W/O type emulsion cosmetic composition is encapsulated;

FIG. 3 is a microscopic view of the polyurethane foam listed in Table 2, each at 10X0.3 magnification;

FIG. 4 is a microscopic view, each at 10X0.3 magnification, of the polyurethane foam listed in Table 3; and

FIG. 5 is a photograph showing example 1, comparative example 1 and comparative example 2 after storage at 50 ℃ for 2 hours.

[ detailed description ] embodiments

In one aspect, polyether-based polyurethane foams for use in impregnating cosmetic compositions are provided. In another aspect, the polyether-based polyurethane foam may serve as a carrier in which the cosmetic composition is carried and retained.

The term "polyurethane foam" as used herein means a foamed and cured polyurethane resin, also referred to as "foamed polyurethane".

In one aspect, polyether-based polyurethane foams are more resistant to moisture and therefore less prone to rupture under high humidity conditions and exhibit high stability, as compared to polyester-based polyurethane foams. In addition, the polyether-based polyurethane foam has a larger pore structure than the polyester-based polyurethane foam, thereby having improved air permeability, soft feeling, flexibility, and flexibility. Furthermore, polyether-based polyurethane foams require reduced production costs and are therefore more cost-effective than polyester-based polyurethane foams.

In one aspect, the polyurethane foam may comprise a dry polyurethane foam or a wet polyurethane foam. In particular, the wet polyether-based polyurethane foam has the properties shown in table 1 below.

[ Table 1]

In general, wet polyether-based polyurethane foams have smaller pore sizes and denser structures than dry polyether-based polyurethane foams. Dry polyether-based polyurethane foams have oleophilic surface properties, while wet polyether-based polyurethane foams have hydrophilic surface properties as a result of wet foaming. The wet polyether-based polyurethane foam is a continuous microcellular polyurethane foam having uniform high porosity, exhibiting high water/oil absorbability. Fig. 1 is a microscopic view of a wet polyether-based polyurethane foam.

In one aspect, the polyurethane foam may have a hardened or reticulated structure. On the other hand, the polyurethane foam may have a network structure that allows uniform and easy impregnation with the cosmetic composition and provides a high impregnation ratio.

In one aspect, the polyurethane foam can have a density of 1 to 3 pounds per cubic foot (pcf), particularly 1 to 2 pcf. When the polyurethane foam has a density of less than 1pcf, the cosmetic composition may be excessively released and thus is inconvenient to use. When the polyurethane foam has a density of more than 3pcf, it is impossible to provide a sufficient number of pores for impregnation of the cosmetic composition, so that it is difficult to effectively impregnate the cosmetic composition.

In one aspect, the polyurethane foam can have a cell number of from 20 to 120 cells per inch (ppi), particularly from 75 to 95 ppi. When the number of pores of the polyurethane foam is less than 70ppi, it has poor elasticity, is inconvenient to use, and is not easy to control the flowability of the cosmetic composition. When the polyurethane foam has a cell number of more than 120ppi, it provides the cosmetic composition with low durability and poor hand during use.

In one aspect, the polyurethane foam may have an ASKER hardness of 10 to 70, particularly 20 to 60, more particularly 30 to 50, as measured by DUROMETER HARDNESS TESTER (type F) available from ASKER.

When the polyurethane foam is so soft that its hardness is less than 10, the cosmetic composition impregnated in the polyurethane foam may be excessively released, and at the same time, it is taken by a cosmetic tool such as a Nitrile Butadiene Rubber (NBR) puff or a hand for packing the cosmetic composition enclosed in the container. When the polyurethane foam is so hard that its hardness is more than 70, the cosmetic composition may not be easily released.

In one aspect, the polyurethane foam may have an open cell structure. When the polyurethane foam has a closed cell structure, bubbles are held in the polyurethane, so that the low-density emulsion-type cosmetic composition may not be easily impregnated therein. Therefore, a polyurethane foam having an open cell structure may be exclusively used.

In one aspect, the cosmetic composition to be impregnated in the polyurethane foam includes a liquid cosmetic composition, particularly an emulsion-type cosmetic composition, more particularly a water-in-oil (W/O) type or oil-in-water (O/W) type emulsion cosmetic composition.

In one aspect, the emulsion cosmetic composition can have a low viscosity, particularly 5000-. When the viscosity of the emulsion cosmetic composition is less than 5000cp, it may be separated into an oil phase and a water phase, thereby making it difficult to uniformly impregnate the polyurethane foam with the composition. When the viscosity of the emulsion cosmetic composition is higher than 15000cp, it may provide an undesirably thick and heavy hand when applied to the skin.

In one aspect, cosmetic compositions include skin care compositions and cosmetic compositions. Non-limiting examples of cosmetic compositions may include make-up foundation, makeup base, foundation, powder, two-in-one cake, lipstick, lip balm, eye shadow, eyebrow pencil, concealer product, lip liner, blush, uv protectant, lotion, cream, or essential oil. More particularly, the cosmetic composition may be formulated as a make-up foundation, a liquid or solid foundation, a powder, a two-in-one cake, a lipstick, a lip gloss, an eye shadow, a eyebrow pencil, a concealer product, or a blush, but is not limited thereto.

In one aspect, a cosmetic product is provided in which a polyether-based polyurethane foam impregnated with a cosmetic composition is encapsulated. The cosmetic product includes a cosmetic composition applied to the polyether-based polyurethane foam disclosed herein, thereby allowing high-quality packaging of the cosmetic composition. In addition, the cosmetic product allows the polyurethane foam to be uniformly loaded in the cosmetic composition for a long time and to be released in a sufficient amount when the user applies the cosmetic composition. Further, the cosmetic product maintains long-term durability and stability. The cosmetic products disclosed herein may be provided as a container for packaging, often abbreviated as "pact", which generally includes a lower portion containing polyether-based polyurethane foam and an upper portion having a lid to which a mirror or the like may be bonded. Fig. 2 shows an exemplary diagram of polyether-based polyurethane foam provided in a packaging container.

Now, examples, comparative examples, preparation examples and test examples are described. The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[ test example 1] measurement of Properties of polyurethane foam

The properties of the various types of polyurethane foams were determined in order to select compositions suitable for impregnation with low-viscosity emulsion cosmetic compositions of the W/O type or O/W type. Tables 2 and 3 below show each type of polyurethane foam and the corresponding properties. In addition, tables 3 and 4 are micrographs of each type of polyurethane foam, magnified 10x 0.3.

[ Table 2]

[ Table 3]

In table 3, polyether-based polyurethane foam 1 is a dry polyether-based polyurethane foam.

[ test example 2] evaluation of the formulations

Among the various kinds of polyurethane foams listed in tables 2 and 3, polyether-based polyurethane foam 1 (example 1), polyester-based polyurethane foam 2 (comparative example 1), and polyester-based polyurethane foam 3 (comparative example 2) were selected and impregnated with a W/O type emulsion cosmetic composition. Then, their stability with temperature and time was evaluated. The results are shown in table 4 below and fig. 5. Fig. 5 shows photographs of example 1, comparative example 1 and comparative example 2 after they were stored at 50 ℃ for 2 hours.

[ Table 4]

From the above results, it can be seen that each of the polyurethane foams according to comparative examples 1 and 2 was broken when each of the foams was impregnated with the W/O type emulsion cosmetic composition, resulting in the cosmetic composition being delaminated and generating bubbles with time under a high temperature or a severe change in temperature, thereby showing very instability. In contrast, example 1 substantially maintained its original state and showed high stability.

Therefore, it can be seen that the polyether-polyurethane foam shows higher stability in impregnation with the cosmetic composition than the polyester-based polyurethane foam, and is more suitable for impregnating the cosmetic composition.

[ preparation examples 1 and 2] preparation of UV-protective cosmetic composition

In preparation examples 1 and 2, W/O type emulsion UV-protective cosmetic compositions were prepared according to the formulations of Table 5 below

In particular, the UV protectant is incorporated into the oily ingredient, and is dissolved and emulsified therein. Next, the oily component was mixed with a surfactant and heated to 80 ℃, stirred at this temperature, to homogenize the mixture. Then, a pigment was further added thereto, followed by stirring and homogenization, thereby providing an oily portion. In a separate mixer, the aqueous component is mixed and heated to 80 ℃ with agitation at this temperature to provide a fully dissolved aqueous portion. The prepared aqueous part was gradually added to the oily part and emulsified using a homomixer. After cooling to 50 ℃, skin protective ingredients and fragrance are added thereto, followed by cooling, thereby providing a low viscosity W/O type emulsion UV protective cosmetic composition.

[ Table 5]

In Table 5, disteardimonium hectorite acts as a thickener, polymethyl methacrylate is used as a pure bulk pigment, and titanium dioxide/aluminum hydroxide/stearic acid as an inorganic UV protectant.

[ test example 3] evaluation of preference for hardness depending on polyurethane foam

Different types of polyether-based polyurethane foams having different hardness values were impregnated with preparation examples 1 and 2, and the user preference in each case was determined. Specifically, 50 women were divided into two groups (25 per group). They were allowed to apply each of preparation examples 1 and 2 impregnated in polyether-based polyurethane foams having different hardness values to the skin with NBR powder puff within two days. All user preferences, including hand and coating quality, were then evaluated in each case. The results are shown in tables 6 and 7.

[ Table 6]

[ Table 7]

From the above results, it can be seen that it is most preferable when the Asker hardness value for the polyether-based polyurethane foam impregnated with the compositions according to preparation examples 1 and 2 is 40.

Those skilled in the art will appreciate that the conceptions and specific embodiments disclosed in the foregoing description may be readily utilized as a basis for modifying or designing other embodiments for carrying out the objectives of the present disclosure. Those skilled in the art will also appreciate that such equivalent embodiments do not depart from the spirit and scope of the disclosure as set forth in the appended claims.

Claims (6)

1. A cosmetic comprising a polyether-based polyurethane foam impregnated with a cosmetic composition, wherein the polyether-based polyurethane foam has a network structure and has a density of 1 to 3pcf, the cosmetic composition is a water-in-oil emulsion cosmetic composition, and wherein the cosmetic composition is taken in a makeup kit.

2. The cosmetic according to claim 1, wherein the polyether-based polyurethane foam has a cell number of 70 to 120 cells/inch.

3. The cosmetic according to claim 1, wherein the polyether-based polyurethane foam has an ASKER hardness of 10 to 70.

4. The cosmetic according to claim 1, wherein the polyether-based polyurethane foam has an open cell structure.

5. The cosmetic according to claim 1, wherein the emulsion cosmetic composition has a viscosity of 5,000-15,000 cp.

6. The cosmetic according to claim 1, wherein the cosmetic composition is provided for use as a cosmetic foundation, a makeup base, a foundation, a powder, a two-in-one cake, a lipstick, a lip gloss, an eye shadow, a eyebrow pencil, a concealer product, or a blush.