Soft polyurethane foam using hydrocarbon polyol, and cosmetic comprising same
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Solution Overview
Problem
Existing soft polyurethane foams face challenges in durability and compatibility when used as impregnating materials for cosmetic compositions, particularly in maintaining shape and resisting deformation under pressure, and in controlling polarity to suit various cosmetic products.
Innovation Solution
A soft urethane foam composition is developed using a hydrocarbon polyol and vegetable oil or dimer acid derived from vegetable oil, with controlled crosslinking and modification of double bonds to create an open cell structure and improved compatibility, allowing for effective impregnation of both aqueous and oil-based cosmetic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ether-type polyol is used to prepare urethane foam for cosmetic impregnation, then the foam has good water resistance and chemical resistance, but it shows poor tensile strength, hardness, elongation and flame retardancy
Solution Approach 1:
The patent uses a composite polyol system combining ether-type polyol and polyester-type polyol in specific ratios (ether-type polyol 30-70 wt%, polyester-type polyol 30-70 wt%). This composite approach allows the foam to simultaneously achieve the water and chemical resistance of ether-type polyol while gaining the improved tensile strength, hardness, and elongation properties of polyester-type polyol.
2Strength
If ester-type polyol is used to prepare urethane foam, then the foam has good tensile strength, hardness and elongation, but it has weak water resistance due to hydrolysis
Solution Approach 1:
The patent combines ester-type polyol with ether-type polyol in a balanced ratio (ester-type polyol 30-70 wt%, ether-type polyol 30-70 wt%). The ether-type polyol component provides the necessary water and chemical resistance by preventing hydrolysis, while the ester-type polyol contributes to improved tensile strength, hardness, and elongation properties.
3Adaptability or versatility
If polyols are mixed to adjust physical properties and compatibility with cosmetic composition, then the polarity can be controlled to some extent, but the polyols do not have good compatibility
Solution Approach 1:
The patent optimizes the compositional ratio of ether-type polyol and polyester-type polyol within specific ranges (both at 30-70 wt%). By carefully controlling these parameters, the patent achieves both good compatibility between the different polyol types and the desired polarity adjustment to match various cosmetic compositions, resolving the contradiction between adaptability and compositional stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a durable and versatile impregnating material with enhanced oil-adsorbing ability and controlled polarity, preventing deformation and corrosion, suitable for various cosmetic applications including packaging and applicators, while maintaining stability and resistance to hydrolysis.
Implementation Method 1
a polyurethane foam is obtained by reacting a resin premix which is prepared from a polyol, a catalyst for preparation of a polyurethane foam, a foaming agent, etc. with a polyisocyanate
Implementation Method 2
reacting a resin premix which is prepared from a polyol, a catalyst for preparation of a polyurethane foam, a foaming agent, etc. with a polyisocyanate
Data Source
AI summary
The present invention provides a composition for a soft urethane foam to prepare a soft urethane foam, comprising a polyol, and a foamed soft urethane foam using the same, wherein the polyol is any one selected from among a hydrocarbon polyol, a vegetable oil, and a vegetable-oil-derived dimer acid, or a mixture of a hydrocarbon polyol with any one selected from among a vegetable oil and a vegetable-oil-derived dimer acid. The present invention provides an impregnation material for impregnation of a cosmetic composition, which can control the polarity of the impregnation material for impregnating a hydrophilic cosmetic composition, and an impregnation-use urethane foam composition for preparing the same.