Cosmetic sponge, process for producing elastic polyurethane object, and applicator for cosmetic preparation

A Polyurethane Elastomer, Polyurethane Elasticity Technology

Active Publication Date: 2015-11-04
FUSHIMI PHARMA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the three-dimensional mesh structure cosmetic sponge described in Patent Document 4, in the case of repeated use, the cosmetic material will be squeezed into the hollow portion of the mesh (hole) and absorbed into the deep inside of the sponge, penetrating the sponge and dissipating. There is a problem of sticking to the fingers, and there are still shortcomings as cosmetics
In addition, the absorption depth and extension area have not reached a satisfactory level.

Method used

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  • Cosmetic sponge, process for producing elastic polyurethane object, and applicator for cosmetic preparation
  • Cosmetic sponge, process for producing elastic polyurethane object, and applicator for cosmetic preparation
  • Cosmetic sponge, process for producing elastic polyurethane object, and applicator for cosmetic preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Raw materials used in the production of the polyurethane elastomer (cosmetic sponge) are as follows.

[0117] ・F-151 (polyester-based polyurethane manufactured by Fushimi Pharmaceutical Co., Ltd., solid content 30%)

[0118] 50 parts by mass

[0119] ・T-191 (Fushimi Pharmaceutical Co., Ltd. polyether polyurethane, solid content 30%)

[0120] 50 parts by mass

[0121] 15 parts by mass of dimethylformamide

[0122] ・SORGEN 30 (Sorbitan Sesquioleate HLB value 3.7 manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.)

[0123] 4 parts by mass

[0124] · 400 parts by mass of neutral anhydrous Glauber's salt B (sold by Fushimi Pharmaceutical Co., Ltd.)

[0125] To illustrate, neutral anhydrous Glauber's salt B has Table 1 and figure 1 Particle size distribution shown. The particle size distribution of the neutral anhydrous Glauber's salt used in other embodiments or comparative examples is also shown in Table 1 and figure 1 . In the following d...

Embodiment 2

[0129] Replace Glauber's salt B with Table 1, figure 1 Except that Glauber's salt C (available from Fushimi Pharmaceutical Co., Ltd.) with the particle size distribution shown was used, a polyurethane elastomer was obtained in the same manner as in Example 1, and the pore diameter (maximum diameter) was measured in the same manner as in Example 1. The number of pores above 15 μm and below 75 μm, the number of pores above 75 μm and below 150 μm, and the number of pores exceeding 150 μm were measured for apparent density, tensile strength, elongation, hardness, absorption depth, extension area and ethanol permeability. over time. The scanning electron microscope photographs are shown in image 3 , and record each measurement result in Table 2. Such as image 3 As shown, the obtained cosmetic sponge has a three-dimensional membrane structure.

Embodiment 3

[0152] The skin layer on the surface side and the back side of the polyurethane elastomer obtained in Example 1 was removed by a roller cutter to obtain a sponge body with a thickness of 8 mm. This sponge was cut with a Thomson knife, and ground with a whetstone that rotated the section to obtain a cosmetic applicator (cosmetic puff) with a thickness of 8 mm and a diameter of 60 mm.

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Abstract

Provided is a cosmetic sponge which is constituted of an elastic polyurethane object of a three-dimensional membranous structure, wherein the elastic polyurethane object has an ethanol permeation time in the range of 10-400 seconds, excluding 400 seconds, has cells so that in an area of 1.0 mm × 1.0 mm within the section thereof, there are 150 or more cells having a maximum diameter of 15-150 μm and 10 or less cells having a maximum diameter exceeding 10 μm and that the number of cells having a maximum diameter of 15-75 μm is 80% or more of the number of cells having a maximum diameter of 15-150 μm, and has an apparent density of 120-200 kg/m3. Even when the cosmetic sponge is used for applying a cosmetic preparation that is low in thixotropic property and viscosity, the cosmetic preparation is less apt to infiltrate deeply into the inner part of the sponge and is moderately absorbed thereinto, and the cosmetic preparation can be spread over a larger area. Also provided are: a process for producing the elastic polyurethane object by an aqueous coagulation method using particles of an inorganic salt that have a specific particle size distribution; and an applicator for cosmetic preparations which employs the cosmetic sponge.

Description

technical field [0001] The present invention relates to a cosmetic sponge suitable for use as a foundation puff, particularly a liquid foundation puff, a method for producing a polyurethane elastomer forming the cosmetic sponge, and cosmetic application using the cosmetic sponge utensils. Background technique [0002] In recent years, in makeup methods, a good method that can apply foundation and the like on the skin as thinly and smoothly as possible, that is, a good method that has the characteristics of "thin adhesion" and "spreading" has been sought. Therefore, low-viscosity liquid cosmetics, especially liquid foundations that are easy to lower the viscosity and have a reliable appearance in terms of thin adhesion and spread, tend to be popular. Therefore, there is a recent tendency to start selling liquid foundations that are less thixotropic (thioxotropy) and have covering power that adhere thinner and can cover pores. [0003] As an applicator for such low-viscosity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A45D34/04A45D33/34C08J9/26
CPCA45D33/00A45D34/04C08G18/3206C08G18/4277C08G18/44C08G18/4825C08L75/04A45D2200/1009
Inventor 伊藤喜章胡本大鹏伏见大志户谷勉
Owner FUSHIMI PHARMA
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