Polyurethane foam for impregnating cosmetic compositions and method for manufacturing the same

Abstract

To provide a polyurethane foam for impregnating cosmetic compositions and a method for producing the same. [Solution] A polyurethane foam for impregnating cosmetic compositions can be formed by mixing and foaming polyether polyol and polyester polyol in a weight ratio of 1:0.17 to 0.33. A polyurethane foam for impregnating cosmetic compositions can be provided that has improved long-term stability and allows the cosmetic composition to be easily filled, supported, and discharged.

Description

Technical Field

[0001] This application relates to a polyurethane foam for impregnating a cosmetic composition and a method for producing the same.

Background Art

[0002] In the modern cosmetics market, impregnating members such as sponges are widely used to carry color cosmetics such as foundations. As materials for such impregnating members, various materials are used, but polyurethane foams are often used due to characteristics such as porosity, elastic force, and lightness.

[0003] Polyurethane is synthesized through a chemical reaction between a polyol and a diisocyanate. At this time, the polyol for producing polyurethane is classified into a polyether-based polyol and a polyester-based polyol. Polyurethane produced from a polyester-based polyol has the characteristic of being excellent in physical durability such as tensile strength, abrasion resistance, and tear resistance, and thus has the advantage of being able to withstand well the pressure and friction repeated during the application of cosmetics. On the other hand, polyurethane produced from a polyether-based polyol has the characteristic of being excellent in resistance to moisture, and thus has the advantage of being able to maintain its form and function well even in a moist environment. Therefore, it is necessary to appropriately combine the advantages of polyurethane produced from a polyester-based polyol and polyurethane produced from a polyether-based polyol, and it is necessary to produce it with physical properties optimized for use as an impregnating member.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of this application is to provide a polyurethane foam for impregnating a cosmetic composition and a method for producing the same.

Means for Solving the Problems

[0005] The embodiments of this application provide a polyurethane foam for impregnating cosmetic compositions. The polyurethane foam for impregnating cosmetic compositions can be formed by mixing and foaming a polyether polyol and a polyester polyol in a weight ratio of 1:0.17 to 0.33.

[0006] Furthermore, the polyurethane foam for impregnating the cosmetic composition may have a pore count of 70-80 ppi and a hardness of 70-85 based on the ASKER Type F hardness tester.

[0007] Furthermore, the polyurethane foam for impregnating the cosmetic composition may have a tensile strength of 220 to 240 kPa and an elongation of 210 to 250%.

[0008] Furthermore, the polyurethane foam for impregnating cosmetic compositions can be impregnated with cosmetic compositions having an oil phase component content of 25% to 50% by weight.

[0009] Furthermore, the polyurethane foam for impregnating the cosmetic composition can be impregnated with a cosmetic composition having a viscosity of 7,000 cps or more and 45,000 cps or less.

[0010] The embodiments of this application provide a method for producing polyurethane foam for impregnation with cosmetic compositions. The method for producing polyurethane foam for impregnation with cosmetic compositions includes the steps of: mixing a polyurethane foam production composition comprising a polyether polyol and a polyester polyol; and foaming the mixed polyurethane foam composition, wherein the polyether polyol and the polyester polyol may be mixed in a weight ratio of 1:0.17 to 0.33.

[0011] Furthermore, the polyurethane foam for impregnating the cosmetic composition may have a pore count of 70-80 ppi and a hardness of 70-85 based on the ASKER Type F hardness tester.

[0012] Furthermore, the polyurethane foam for impregnating the cosmetic composition may have a tensile strength of 220 to 240 kPa and an elongation of 210 to 250%.

[0013] Furthermore, the polyurethane foam for impregnating cosmetic compositions can be impregnated with cosmetic compositions having an oil phase component content of 25% to 50% by weight.

[0014] Furthermore, the polyurethane foam for impregnating cosmetic compositions can be impregnated with cosmetic compositions having a viscosity (Brookfield DVplus Viscometer, Spindle No. 4, 6 rpm, 25℃) of 7,000 cps or more and 45,000 cps or less.

[0015] Furthermore, the polyurethane foam manufacturing composition may contain a polyether polyol, a polyester polyol, a blowing agent, a catalyst, and additives.

[0016] Furthermore, the step of mixing the polyurethane foam manufacturing composition may be carried out for 20 to 40 minutes at a stirring speed of 4,000 to 5,000 RPM under temperature conditions of 18 to 28°C.

[0017] Furthermore, the foaming step can be performed at a discharge pressure of 35,000 to 45,000 Pa. [Effects of the Invention]

[0018] According to the embodiments of this application, a polyurethane foam for impregnating cosmetic compositions can be provided, which has improved long-term stability and allows for easy filling, loading, and discharge of cosmetic compositions.

[0019] Furthermore, according to the embodiments of this application, a polyurethane foam can be provided that impregnates a cosmetic composition having an oil phase component content of 25% to 50% by weight, or a viscosity of 5,000 cps or more and 45,000 cps or less, with high long-term stability and impregnation performance.

[0020] The effects obtained from the examples of the present application are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those with ordinary knowledge in the technical field to which the present application belongs from the following description.

Brief Description of the Drawings

[0021] [Figure 1] It is a diagram showing the stability evaluation results of the polyurethane foam according to the production example of the present application. [Figure 2] It is a diagram showing the impregnation performance evaluation results of the polyurethane foam according to the production example of the present application. [Figure 3] It is a diagram showing the impregnation performance evaluation results of the polyurethane foam according to the production example of the present application.

Best Mode for Carrying Out the Invention

[0022] The structural or functional description of the examples disclosed in this specification is merely exemplified for the purpose of explaining the examples according to the technical idea of the present application. In addition, the examples according to the technical idea of the present application can be implemented in various forms other than the examples disclosed in this specification. Also, the technical idea of the present application is not to be construed as being limited to the examples described in this specification.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0024] Among the physical properties mentioned in this specification, when the measurement temperature affects the physical properties, unless otherwise specified, the physical properties are the physical properties measured at normal temperature and normal pressure.

[0025] Among the physical properties mentioned in this specification, unless otherwise specified, the physical properties can basically follow the SI unit system. For example, weight can use the kg unit, and length can use the m unit.

[0026] As used herein, "room temperature" refers to the natural temperature of a body of water that is neither heated nor cooled, and can mean any temperature within the range of 10°C to 30°C, for example, approximately 25°C. Unless otherwise specified herein, the unit of temperature is Celsius (°C).

[0027] As used herein, "atmospheric pressure" refers to the natural pressure that is not pressurized or depressurized, and typically refers to atmospheric pressure in the range of approximately 700 mmHg to 800 mmHg.

[0028] As used herein, the terms "a-b" mean a range between a and b, including both a and b. For example, "containing a-b parts by weight" is equivalent to "containing within the range of a-b parts by weight."

[0029] Throughout this specification, values ​​expressed in range form include not only numerical values ​​explicitly mentioned as the limits of such ranges, but also all individual numerical values ​​or subranges contained within such ranges, as if each numerical value and subrange were explicitly mentioned. For example, the range "approximately 0.1% to approximately 5%" or "approximately 0.1% to approximately 5%" includes not only approximately 0.1% to approximately 5%, but also individual values ​​within the indicated range (e.g., 1%, 2%, 3%, and 4%) and subranges (e.g., 0.1% to 0.5%, 1.1% to 2.2%, and 3.3% to 4.4%).

[0030] As used herein, the terms “about” or “approximately” mean that dimensions, sizes, formulations, parameters, shapes, and other quantities and properties may not be exact and may be approximate and / or greater or less, reflecting tolerances, conversion factors, rounding, measurement errors, and other factors known to those skilled in the art, where applicable. The terms “about” or “and” generally apply to dimensions, sizes, formulations, parameters, shapes, or other quantities or properties described herein, whether expressly mentioned or not. As used herein, the term “about” includes the exact value or range mentioned, and may allow for a degree of variability of, for example, within 10%, 5%, or 1% of the mentioned value or the mentioned range limit value within a given value or range.

[0031] Where this specification does not describe a method for measuring or evaluating specific dimensions, sizes, formulations, parameters, shapes, and other quantities and properties, a person skilled in the art can readily recognize a conventionally known method for measuring or evaluating such a method, or can readily derive such a method by referring to prior art known before the filing date of this specification.

[0032] The terms used herein are for illustrative purposes only and are not intended to limit and / or restrict this application. Singular expressions include plural expressions unless the context clearly indicates otherwise. Furthermore, numbers used herein (e.g., 1st, 2nd, etc.) are merely identifiers to distinguish one component from another.

[0033] In this specification, when a part includes other components, this means that, unless otherwise stated, it may include other components rather than excluding them.

[0034] Furthermore, in this application, the term “or” is intended to mean an implicational “or” rather than an exclusive “or.” That is, unless otherwise specified or contextually clear, “X utilizes A or B” is intended to mean one of the natural implicational substitutions. That is, if X utilizes A; X utilizes B; or X utilizes both A and B, “X utilizes A or B” may apply to any of the aforementioned cases. Also, as used herein, the terms “and / or” refer to and include all possible combinations of one or more of the related configurations listed.

[0035] The embodiments of this application provide a polyurethane foam for impregnating cosmetic compositions. Polyurethane foam is a substance synthesized through a chemical reaction between a polyol and a diisocyanate, and is suitable as a material for impregnating members of cosmetic compositions because it has properties such as porosity, elasticity, and lightness. A polyol is a compound containing multiple hydroxyl groups (-OH), and a diisocyanate is a compound containing two isocyanate groups (-NCO).

[0036] In the examples, polyurethane foam for impregnation of cosmetic compositions can be formed by foaming a polyurethane foam manufacturing composition. In this case, the polyurethane foam manufacturing composition may include a polyether polyol and a polyester polyol. That is, polyurethane foam for impregnation of cosmetic compositions can be formed by mixing and foaming a polyether polyol and a polyester polyol. A polyether polyol is a polyol containing repeating ether bonds (-O-), and may include, for example, polypropylene glycol (PPG), polyethylene glycol (PEG), polyoxypropylene triol, and polytetramethylene ether glycol (PTMEG). A polyester polyol is a polyol containing repeating ester bonds (-COO-), and may include adipic acid-based polyester polyol, phthalic acid-based polyester polyol, succinic acid-based polyester polyol, and the like.

[0037] In the examples, the composition for producing polyurethane foam may contain polyether polyol and polyester polyol in a weight ratio of 1:0.17 to 0.33. That is, polyurethane foam for impregnation of cosmetic compositions can be formed by mixing and foaming polyether polyol and polyester polyol in a weight ratio of 1:0.17 to 0.33. In this specification, "containing / mixing and foaming A and B in a weight ratio of X:Y" means "weight ratio A:B = X:Y". Within the above range, the cosmetic impregnation performance and long-term stability of the polyurethane foam can be improved. For example, the weight ratio of polyether polyol and polyester polyol may be 1:0.17 or higher, 1:0.19 or higher, 1:0.21 or higher, or 1:0.23 or higher. For example, the weight ratio of polyether polyol and polyester polyol may be 1:0.33 or lower, 1:0.31 or lower, 1:0.29 or lower, or 1:0.27 or lower.

[0038] In the examples, the polyurethane foam for impregnating cosmetic compositions may have a pore count of 70 to 80 ppi per inch. The pore count per inch is a value measured to determine the number of pores present per inch in the polyurethane foam. A higher pore count indicates a structure with many small pores, while a lower pore count indicates a structure with large pores spaced widely apart. When the pore count per inch falls within the above range, the cosmetic impregnation performance and long-term stability of the polyurethane foam may be improved. For example, the pore count per inch of the polyurethane foam for impregnating cosmetic compositions may be 70 ppi or more, 71 ppi or more, 72 ppi or more, 73 ppi or more, or 74 ppi or more. For example, the pore count per inch of the polyurethane foam for impregnating cosmetic compositions may be 80 ppi or less, 79 ppi or less, 78 ppi or less, 77 ppi or less, or 76 ppi or less.

[0039] In the examples, the polyurethane foam for impregnation of cosmetic compositions may have a hardness of 70 to 85, based on the ASKER Type F hardness tester. The ASKER hardness tester is a hardness testing system used to measure the hardness of soft materials such as rubber, foam, and gel. The ASKER Type F hardness tester is primarily used to measure the hardness of soft foam materials such as polyurethane foam and sponge. When the ASKER hardness falls within the above range, the cosmetic impregnation performance and long-term stability of the polyurethane foam may be improved. For example, the hardness of the polyurethane foam for impregnation of cosmetic compositions may be 70 or higher, 72 or higher, 74 or higher, 76 or higher, or 78 or higher. For example, the hardness of the polyurethane foam for impregnation of cosmetic compositions may be 85 or lower, 84 or lower, 83 or lower, 82 or lower, or 81 or lower.

[0040] In the examples, the polyurethane foam for impregnating cosmetic compositions may have a tensile strength of 200 to 300 kPa. Tensile strength is a value that indicates how much force a material can withstand before it is cut or broken. When the tensile strength falls within the above range, the cosmetic impregnation performance and long-term stability of the polyurethane foam may be improved. For example, the tensile strength of the polyurethane foam for impregnating cosmetic compositions may be 200 kPa or more, 210 kPa or more, 220 kPa or more, 230 kPa or more, or 240 kPa or more. For example, the tensile strength of the polyurethane foam for impregnating cosmetic compositions may be 300 kPa or less, 290 kPa or less, 280 kPa or less, 270 kPa or less, 260 kPa or less, 250 kPa or less, or 240 kPa or less. For example, the polyurethane foam for impregnating cosmetic compositions may have a tensile strength of 220 to 240 kPa.

[0041] In the examples, the polyurethane foam for impregnating cosmetic compositions may have an elongation rate of 200-250%. Elongation rate is a percentage value representing how much a material stretches before it breaks in a tensile test. When the elongation rate falls within the above range, the cosmetic impregnation performance and long-term stability of the polyurethane foam may be improved. For example, the elongation rate of the polyurethane foam for impregnating cosmetic compositions may be 200% or more, 210% or more, or 220% or more. For example, the elongation rate of the polyurethane foam for impregnating cosmetic compositions may be 250% or less, 240% or less, or 230% or less. For example, the polyurethane foam for impregnating cosmetic compositions may have an elongation rate of 210-250%.

[0042] In the examples, the polyurethane foam for impregnating cosmetic compositions can be impregnated with cosmetic compositions having an oil phase component content of 25% to 50% by weight. Here, the oil phase component can refer to oil-soluble components such as oils (e.g., vegetable oils, animal oils, mineral oils, synthetic oils, etc.), waxes, higher fatty acids, higher alcohols, ester oils, silicone oils, and organic UV-blocking agents. Excellent impregnation performance can be exhibited when impregnating with cosmetic compositions having an oil phase component content of 25% to 50% by weight. For example, the oil phase component content in the cosmetic composition may be 25% or more by weight, 30% or more by weight, 35% or more by weight, 40% or more by weight, or 45% or more by weight. For example, the oil phase component content in the cosmetic composition may be 50% or less by weight, 45% or less by weight, 40% or less by weight, 35% or less by weight, or 30% or less by weight.

[0043] In the examples, the polyurethane foam for impregnating cosmetic compositions can be impregnated with cosmetic compositions having a viscosity of 5,000 cps or more and 45,000 cps or less. For example, the viscosity of the cosmetic composition to be impregnated may be 5,000 cps, 7,000 cps, 10,000 cps, 15,000 cps, 20,000 cps, 25,000 cps, or 30,000 cps or more or more, or 45,000 cps, 40,000 cps, 37,000 cps, 35,000 cps, 30,000 cps, 25,000 cps, or 20,000 cps or less or less. For example, the viscosity of the cosmetic composition may be 7,000 cps or more and 45,000 cps or less. For example, the viscosity of the cosmetic composition may be 7,000 cps or more and 40,000 cps or less. For example, the viscosity of the cosmetic composition may be 10,000 cps or more and less than 40,000 cps.

[0044] In the examples, the cosmetic composition may include additives commonly used in the industry, provided that they do not impair the effects of the examples of this application. For example, the cosmetic composition may further include thickeners, pH adjusters, surfactants, stabilizers, preservatives, antimicrobials, bactericides, moisturizers, UV blockers, skin conditioning agents, whitening agents, colorants, organic pigments, inorganic pigments, fragrances, vitamins, natural pigments, pearls, and other functional ingredients. Here, the functional ingredients may include, for example, wrinkle-improving ingredients, whitening ingredients, antioxidants, anti-aging ingredients, plumping ingredients, exfoliating ingredients, scrubbing ingredients, moisturizing ingredients, skin barrier strengthening ingredients, and skin elasticity strengthening ingredients. The amounts of the above ingredients can be easily selected by a person skilled in the art, provided that they do not impair the purpose and effects of this application.

[0045] In the examples, the cosmetic composition may be provided in dosage forms commonly manufactured in the industry. For example, the cosmetic composition may be in the form of an oil dispersion in which the powder complex is dispersed in an oil phase, a water dispersion in which the powder complex is dispersed in an aqueous phase, an oil-in-water (O / W), water-in-oil (W / O), water-in-oil-in-water (W / O / W) and oil-in-water-in-oil (O / W / O) emulsion, a solubilizer, etc. However, it is not limited to these, and the cosmetic composition may also be provided in the form of a solution, suspension, emulsion, etc.

[0046] In the examples, the cosmetic composition can be manufactured in a variety of products. For example, it can be manufactured in sun care products such as sun cream, sun milk, sun lotion, and sun cushion. In addition, it can be manufactured in soaps, detergents, and cleansing creams, or in tinted cosmetics such as lipstick, makeup base, foundation, compact, concealer, and skin cover. It may also be manufactured in hair cleansing products such as shampoo, rinse, hair conditioner, and hair gel.

[0047] In the examples, the composition may be a topical skin preparation composition. For example, the topical skin preparation composition may have a dosage form such as a solution.

[0048] In the examples, the skin topical preparation composition can appropriately incorporate, as needed, components commonly used in skin topical preparations such as cosmetics and pharmaceuticals, such as aqueous phase components, oil phase components, powder components, alcohols, humectants, thickeners, UV blockers, whitening agents, preservatives, antioxidants, surfactants, fragrances, pigments, fatty substances, solvents, concentrates, gelling agents, softeners, foaming agents, fragrances, metal ion sequestering agents, chelating agents, vitamins, various skin nutrients, or combinations thereof. The amounts of the aforementioned components can be easily selected by those skilled in the art within a range that does not impair the purpose and effects of this application.

[0049] The embodiments of this application provide a method for producing polyurethane foam for impregnation with cosmetic compositions. The method for producing polyurethane foam for impregnation with cosmetic compositions may include the steps of: mixing a composition for producing polyurethane foam; and foaming the mixed polyurethane foam composition. A detailed description of the polyurethane foam for impregnation with cosmetic compositions produced by the method is provided herein.

[0050] In the examples, the composition for producing polyurethane foam may include a polyether polyol and a polyester polyol. For a detailed description of the polyether polyol and polyester polyol and their blending ratios, please refer to the contents of this specification.

[0051] In the examples, the composition for producing polyurethane foam may include a polyether polyol, a polyester polyol, a blowing agent, a catalyst, and an additive. The blowing agent can form bubbles in the polyurethane foam to create a porous structure and may include, for example, water, HFC-141b (Hydrochlorofluorocarbon-141b), HFC-245fa (Hydrofluorocarbon-245fa), etc. The catalyst can control the curing time, mechanical properties, and final structure of the polyurethane foam and may include, for example, dimethylethanolamine (DMEA), dibutyltin dilaurate (DBTDL), triethylenediamine (TEDA, DABCO), etc. The additive can improve the physical and chemical properties of the polyurethane foam or impart specific functions to the polyurethane foam and may include, for example, silicone surfactants, trichloropropyl phosphate (Tris(1-chloro-2-propyl)phosphate, TCPP), calcium carbonate, etc. The physical properties of polyurethane foam can be optimized by appropriately adjusting the types and contents of blowing agents, catalysts, and additives.

[0052] In the examples, the composition for manufacturing polyurethane foam may further contain a reactant. The reactant may be, for example, a substance having two or more isocyanate reactive groups. For example, the reactant may be a diisocyanate. For example, the reactant may include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), naphthylene diisocyanate (NDI), hexamethylene diisocyanate (HDI), and the like.

[0053] In the examples, the step of mixing the polyurethane foam manufacturing composition may be carried out for 20 to 40 minutes at a temperature of 18 to 28°C and a stirring speed of 4,000 to 5,000 RPM. Under these conditions, the physical properties of the polyurethane foam according to the examples of this application can be derived.

[0054] In the examples, during the foaming stage, the polyether polyol and polyester polyol react with the diisocyanate to form a polyurethane foam.

[0055] In the examples, the foaming step may be carried out at a discharge pressure of 35,000 to 45,000 Pa. Under these conditions, the physical properties of the polyurethane foam according to the examples of this application can be derived.

[0056] The present invention will be described below through manufacturing and experimental examples, but the scope of the present invention is not limited to the content presented below.

[0057] <Manufacturing example>

[0058] (1) Manufacturing of Examples 1-3

[0059] Polyol compositions with the content listed in Table 1 were mixed with methylenediphenylmethane diisocyanate (MDI) in a 1:1 weight ratio at a temperature of 18-28°C at a stirring speed of 4,500 RPM for 30 minutes, and then foamed at a discharge pressure of 40,000 Pa to produce the polyurethane foams of Production Examples 1-3. The units of content in Table 1 are weight percent.

[0060] [Table 1]

[0061] (2) Manufacturing of manufacturing examples 4 and 5 Table 2 shows the physical properties of the polyurethane foam produced according to Production Example 1. Furthermore, the polyurethane foams of Production Examples 4 and 5 were produced by changing the manufacturing process conditions of the polyurethane foam and modifying its physical properties as shown in Table 2.

[0062] For each of the manufacturing examples 1, 4, and 5, the pore count per inch (ppi) was measured according to ASTM WI-QA-14, the Azkar hardness was measured according to JSI K6301A, the elongation was measured according to ASTM D638, and the tensile strength was measured according to ISO 1798.

[0063] [Table 2]

[0064] <Example of experiment>

[0065] (1) Experimental Example 1: Evaluation of the stability of polyurethane foam

[0066] Each of the manufacturing examples 1-3 was placed in an incubator at 70°C and 90% humidity. The occurrence of hydrolysis and the maintenance of elastic recovery were visually confirmed over time and are shown in Table 3. The maintenance of elastic recovery was evaluated by applying pressure to each polyurethane foam with a sharp object for one second, and then checking for tearing. Figure 1 shows photographs of each of the manufacturing examples 1-3 after three months in the incubator, following pressure applied with a sharp object for one second.

[0067] [Table 3]

[0068] The experimental results confirm that the polyurethane foam from manufacturing example 1 did not undergo hydrolysis even after 3 months, and that its elastic recovery ability was maintained.

[0069] On the other hand, in manufacturing example 2, it was confirmed that the elastic recovery force decreased after 3 months, and in manufacturing example 3, it was confirmed that hydrolysis occurred after 2 weeks.

[0070] (2) Experimental Example 2: Evaluation of the impregnation performance of polyurethane foam with cosmetic composition

[0071] The cosmetic impregnation performance of manufacturing examples 1, 4, and 5 was evaluated for filling capacity, load capacity, and discharge capacity, respectively, and is shown in Table 4. A circle (○) indicates excellent filling capacity, load capacity, or discharge capacity, while a cross (×) indicates insufficient capacity.

[0072] Specifically, for the filling strength test, 10 g of a cosmetic composition with an oil phase component content of 40% and a viscosity of 20,000 cps was applied to a polyurethane foam, and after one day, it was checked whether the cosmetic composition had permeated into the interior of the polyurethane foam. At this time, if the cosmetic composition had completely permeated, it was evaluated as having excellent filling strength, and if there was any residue that had not permeated, it was evaluated as having insufficient filling strength. Unless otherwise specified, the viscosities described herein were measured using a Brookfield DVplus viscometer under the conditions of spindle No. 4, 6 rpm, and 25°C.

[0073] Furthermore, for the load-bearing capacity item, 10 g of a cosmetic composition with an oil phase component content of 40% and a viscosity of 20,000 cps was applied to a polyurethane foam, and the weight change of the polyurethane foam before and after impregnation was measured to confirm the total amount (in grams) of the cosmetic composition that was loaded. In this case, if the loaded amount was 9 g or more, the load-bearing capacity was evaluated as excellent, and if it was less than 9 g, the load-bearing capacity was evaluated as insufficient.

[0074] Furthermore, in the discharge force category, a polyurethane foam impregnated with a cosmetic composition was discharged using a cosmetic puff at 100 N / m². 2 The cosmetic composition was applied to a makeup puff by pressing it with pressure, and the change in weight of the makeup puff before and after application was measured to determine the total amount (in grams) of the cosmetic composition that was dispensed. If the amount dispensed was between 0.2 and 0.4 g, the dispensing power was evaluated as excellent; if it was less than 0.2 g, the amount dispensed was evaluated as insufficient and the dispensing power was insufficient; and if it exceeded 0.4 g, the amount dispensed was too much, making it difficult to use, and the cosmetic composition flowed out of the polyurethane foam even without external force, indicating insufficient dispensing power.

[0075] [Table 4]

[0076] The experimental results confirm that Manufacturing Example 1 exhibits excellent filling, loading, and discharge capabilities, making it suitable for impregnation of cosmetic compositions.

[0077] On the other hand, in manufacturing example 4, the amount of cosmetic discharged was too large, making it difficult to use, and it was confirmed that the cosmetic flowed out of the polyurethane foam even without external force, indicating insufficient discharge capacity. In manufacturing example 5, it was confirmed that the filling capacity, carrying capacity, and discharge capacity were all insufficient.

[0078] (3) Experimental Example 3: Evaluation of impregnation performance based on the content and viscosity of the oil phase component of the cosmetic composition

[0079] For the polyurethane foam of Manufacturing Example 1, the content and viscosity of the oil phase component of the cosmetic composition to be impregnated were changed as shown in Table 5, and the cosmetic impregnation performance was evaluated in terms of filling force, loading force, and discharge force, as shown in Table 5. The evaluation methods for filling force, loading force, and discharge force were the same as in Experimental Example 2.

[0080] Figure 2(a) shows a photograph of a polyurethane foam from Production Example 1 filled with a cosmetic composition having an oil phase component content of 40% by weight and a viscosity of 20,000 cps, and Figure 2(b) shows a photograph of the filled polyurethane foam with the cosmetic composition applied using a cosmetic puff. Furthermore, Figure 3(a) shows a photograph of a polyurethane foam from Production Example 1 filled with a cosmetic composition having an oil phase component content of 20% by weight and a viscosity of 50,000 cps, and Figure 3(b) shows a photograph of the filled polyurethane foam with the cosmetic composition applied using a cosmetic puff.

[0081] [Table 5]

[0082] The experimental results confirmed that the polyurethane foam of Production Example 1 exhibited excellent filling, loading, and discharge capabilities for cosmetic compositions with an oil phase component content of 25-50% by weight and a viscosity of 5,000 cps to 45,000, making it suitable for impregnation of the relevant cosmetic compositions.

[0083] While specific aspects of this application have been described in detail above, to a person with ordinary skill in the art, such specific descriptions are merely preferred embodiments and do not limit the scope of this application. Therefore, the substantial scope of this application is defined by the appended claims and their equivalents.

Claims

1. Formed by mixing and foaming polyether polyol and polyester polyol in a weight ratio of 1:0.17 to 0.

33. A polyurethane foam for impregnating cosmetic compositions, characterized by the features described above.

2. The pore count per inch is 70-80 ppi. The hardness is 70-85, based on the ASKER Type F hardness tester. Polyurethane foam for impregnating cosmetic composition according to claim 1.

3. The tensile strength is 220-240 kPa. The growth rate is 210-250%. Polyurethane foam for impregnating cosmetic composition according to claim 1.

4. A cosmetic composition having an oil phase component content of 25% to 50% by weight is impregnated. Polyurethane foam for impregnating cosmetic composition according to claim 1.

5. Impregnating with a cosmetic composition having a viscosity of 7,000 cps or more and 45,000 cps or less. Polyurethane foam for impregnating cosmetic composition according to claim 1.

6. A method for producing polyurethane foam impregnated with the aforementioned cosmetic composition, A step of mixing a composition for manufacturing polyurethane foam containing a polyether polyol and a polyester polyol; and, The step includes foaming the mixed polyurethane foam composition, In the polyurethane foam manufacturing composition, the polyether polyol and the polyester polyol are mixed in a weight ratio of 1:0.17 to 0.

33. A method for producing polyurethane foam for impregnating cosmetic compositions, characterized by the features described above.

7. The polyurethane foam for impregnating cosmetic compositions has a pore count of 70-80 ppi and a hardness of 70-85 based on the ASKER Type F hardness tester. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

8. The polyurethane foam for impregnating the cosmetic composition has a tensile strength of 220 to 240 kPa and an elongation of 210 to 250%. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

9. The polyurethane foam for impregnating the cosmetic composition is impregnated with a cosmetic composition having an oil phase component content of 25% to 50% by weight. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

10. The polyurethane foam for impregnating the cosmetic composition is impregnated with a cosmetic composition having a viscosity of 7,000 cps or more and 45,000 cps or less. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

11. The aforementioned polyurethane foam manufacturing composition comprises a polyether polyol, a polyester polyol, a blowing agent, a catalyst, and an additive. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

12. The step of mixing the polyurethane foam manufacturing composition is carried out for 20 to 40 minutes at a stirring speed of 4,000 to 5,000 RPM under temperature conditions of 18 to 28°C. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

13. The foaming step is performed at a discharge pressure of 35,000 to 45,000 Pa. A method for producing polyurethane foam for impregnation with cosmetic composition as described in claim 6.

Images