Polyalkylene Oxide-Modified Polymer for Stable Cosmetic Composition
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Solution Overview
Problem
Cosmetic compositions that provide excellent feel, moisture, and smoothness without stickiness and durability issues, especially when exposed to washing and sweating, are not effectively maintained due to sedimentation, agglomeration, and poor water compatibility of organic powders.
Innovation Solution
A cosmetic composition comprising a pulverized polyalkylene oxide-modified product, obtained by reacting a polyalkylene oxide compound, a diol compound, and a diisocyanate compound, in combination with water or a lower alcohol aqueous solution, with specific properties such as median diameter, water absorption capability, and water elution amount, to achieve stability and smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If organic powder is used to improve smoothness and reduce stickiness, then the cosmetic provides excellent feel in usage, but the organic powder sediments and agglomerates during storage requiring re-distribution
Solution Approach 1:
The patent uses a composite material system combining hydrophilic polyether polyurethane polymer with specific organic powders (spherical thermoplastic resin with diameter 1-10 μm). The polymer matrix prevents sedimentation and agglomeration of the organic powder particles, maintaining stability during storage while preserving the smooth feel in usage.
2Stability of the object's composition
If thickener is added to prevent sedimentation of organic powder, then the distributed state is maintained, but the thickener covers the circumference of organic powder reducing silkiness
Solution Approach 1:
The hydrophilic polyether polyurethane polymer acts as an intermediary substance between the organic powder particles and the cosmetic base. It provides steric stabilization and prevents direct contact between powder particles, avoiding the formation of a thick coating that would reduce silkiness, while still maintaining the distributed state and preventing sedimentation.
3Ease of operation
If porous water-absorbable powder is used to maintain smooth effect, then the powder absorbs water and reduces stickiness, but the powder peels off when washed with water
Solution Approach 1:
The patent merges the water-absorbable organic powder particles with the hydrophilic polyether polyurethane polymer matrix. The polymer binds the powder particles to the skin surface and to each other, creating a cohesive structure that maintains the smooth effect while preventing peeling off during washing. The combination achieves both smoothness and durability.
4Quantity of substance
If superabsorbent polymer is used to absorb water, then water absorption capability is extremely high, but gel-absorbed water adheres to skin surface causing poor smooth feeling and reduced durability
Solution Approach 1:
The patent applies local quality control by using fine spherical organic powder particles (1-10 μm diameter) with controlled porosity, rather than large superabsorbent polymer beads. This localized approach allows water absorption at the particle level without forming large gel structures that would adhere to the skin surface and compromise smoothness and durability.
5Ease of operation
If polyalkylene oxide-modified product is used for hair dressing, then the product provides styling effect, but the product washes off with sweat reducing longevity
Solution Approach 1:
The patent creates a composite material system where polyalkylene oxide-modified products are combined with hydrophilic polyether polyurethane polymer and spherical organic powders. This composite structure anchors the styling agents to the hair, preventing them from washing off with sweat, while maintaining the desired styling effect and significantly improving longevity.
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 composition exhibits excellent stability and smoothness with no stickiness, maintaining its effects even after washing, suitable for various applications including skin and hair care.
Implementation Method 1
the pulverized polyalkylene oxide-modified product has a water absorption capability of 10 to 40 g/g
Implementation Method 2
the pulverized polyalkylene oxide-modified product has a water elution amount of 10 to 40 mass%
Implementation Method 3
a pulverized polyalkylene oxide-modified product obtained by reacting a polyalkylene oxide compound, a diol compound, and a diisocyanate compound
Data Source
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Figure 3~4a
Figure 4b
AI summary
The present invention provides a cosmetic composition that is stable, not sticky when used, has excellent moisture and smoothness, and maintains the effects for a long time without deterioration due to washing and/or sweating. Specifically, the present invention provides a cosmetic composition that comprises: (i) a polyalkylene oxide-modified product obtained by reacting a polyalkylene oxide compound, a diol compound, and a diisocyanate compound; and (ii) water or a lower alcohol aqueous solution, wherein the cosmetic composition comprises 0.3 mass% or more polyalkylene oxide-modified product.