Ester Ether Composite Polyurethane Foam Cosmetic
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Solution Overview
Problem
Conventional cushion-type cosmetics lack a suitable polyurethane foam material that balances hydrolysis resistance, oil resistance, and ease of air bubble adjustment, and do not consider the material or structure requirements for optimal cosmetic composition design.
Innovation Solution
A cosmetic comprising an ester/ether composite polyurethane foam with a specific ether/ester molar ratio of 4:6 to 6:4, which impregnates a cosmetic composition with a water content of 35 wt % or less and a threshold shear stress of 100 Pa or less, ensuring stable storage and uniform flow properties for pressurized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ether-based polyurethane foam is used as impregnating material, then hydrolysis resistance and elasticity are improved, but oil resistance deteriorates
Solution Approach 1:
The patent employs a composite polyurethane foam structure combining ether-based polyurethane and ester-based polyurethane in a specific ratio (3:7 to 7:3). This composite approach allows the ether component to provide hydrolysis resistance and elasticity while the ester component contributes oil resistance, thereby resolving the contradiction between hydrolysis resistance and oil resistance through material composition optimization.
2Ease of operation
If ester-based polyurethane foam is used as impregnating material, then air bubble adjustment and abrasion resistance are improved, but hydrolysis resistance deteriorates
Solution Approach 1:
The composite polyurethane foam structure combines ester-based polyurethane (providing air bubble adjustment and abrasion resistance) with ether-based polyurethane (providing hydrolysis resistance). The specific ratio range (3:7 to 7:3) ensures that the ester component delivers ease of operation for air bubble adjustment while the ether component maintains hydrolysis resistance, resolving the contradiction through balanced material composition.
3Object-affected harmful factors
If polyurethane foam with high ester content is used, then chemical resistance is improved, but hydrolysis resistance deteriorates
Solution Approach 1:
The patent utilizes a composite polyurethane foam where ester-based polyurethane (providing chemical resistance) and ether-based polyurethane (providing hydrolysis resistance) are combined in a controlled ratio (3:7 to 7:3). This composite structure allows the ester component to enhance chemical resistance while the ether component maintains hydrolysis resistance, resolving the contradiction between chemical resistance and hydrolysis resistance through composition optimization.
4Ease of operation
If cosmetic composition with high water content is used, then flow properties are improved, but stability during storage deteriorates
Solution Approach 1:
The patent optimizes the water content parameter of the cosmetic composition to a specific range (20-40 wt%). This parameter optimization balances flow properties and storage stability: sufficient water content maintains adequate flow properties for pressurized discharge, while controlled water content prevents excessive microbial growth and maintains storage stability. The specific ratio range resolves the contradiction between flow properties and storage stability through precise parameter control.
Data Source
AI summary
The present invention relates to a cosmetic comprising polyurethane foam in which a liquid cosmetic substance is impregnated. The present invention provides a cosmetic comprising polyurethane foam in which a cosmetic composition is impregnated, wherein the 5 polyurethane of the polyurethane foam comprises an ether group and an ester group in a molar ratio of 4:6 to 6:4, the-<cosmetic composition has a water content of 35 wt % or less, and the threshold shear stress at which storage modulus (G′)=loss modulus (G″) is 100 Pa or less. According to the present invention, provided is a cosmetic comprising a composite polyurethane foam, wherein a cosmetic composition is stably present in a supported state and 10 can be uniformly rearranged inside the foam during pressurization.