Cosmetic Base Polyether Composition Balancing Moisture and Skin Feel
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Solution Overview
Problem
Existing cosmetic bases, such as those described in PTL 1, fail to achieve a balance between feeling of use and moisturizing effect due to the structure and molecular weight of the polyether components.
Innovation Solution
A cosmetic base comprising a polymer with a specific structure represented by Formula (1), where R1, R2, and R3 are independently hydrogen or alkyl groups with 1 to 4 carbon atoms, A is an alkylene group with 2 to 4 carbon atoms, and m and n are between 1.0 and 50, with a number average molecular weight of 10,000 or less and an IOB value of 0.4 to 1.8, providing a balance of moisturizing effect and feel on use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyether with specific structure is used to achieve moisturizing effect, then moisturizing performance is improved, but feeling of use becomes unsatisfactory due to stickiness or sliminess
Solution Approach 1:
The patent changes the molecular parameters of the polyether by controlling the average degree of polymerization (1-50) and the molar ratio of oxyethylene to oxypropylene groups (20-80%). These parameter adjustments optimize both the moisturizing effect and the feeling of use, eliminating stickiness and sliminess while maintaining hydration benefits.
Solution Approach 2:
The patent creates a composite polyether structure combining oxyethylene and oxypropylene groups in specific ratios. This composite approach allows the material to exhibit both strong moisturizing properties and pleasant sensory characteristics, resolving the contradiction between effectiveness and user comfort.
2Reliability
If the molecular weight of polyether is increased to enhance moisturizing performance, then moisturizing effect is improved, but the cosmetic feel deteriorates with increased stickiness
Solution Approach 1:
The patent precisely controls the average degree of polymerization parameter (n) within the range of 1 to 50, which directly regulates the molecular weight. This parameter optimization ensures sufficient moisturizing effect while preventing excessive molecular weight that would cause stickiness and unpleasant sensory feelings.
3Ease of operation
If the structure of polyether is modified to improve feeling of use, then sensory characteristics are improved, but moisturizing performance decreases
Solution Approach 1:
The patent optimizes the molar ratio parameter of oxyethylene to oxypropylene groups within 20-80%, which simultaneously improves the feeling of use by reducing stickiness and maintains effective moisturizing performance. This balanced parameter selection resolves the contradiction between sensory quality and functional efficacy.
Data Source
AI summary
Provided is a new cosmetic base that achieves both feel on use and a moisturizing effect. The cosmetic base contains or comprises a polymer having a structure represented by formula (1). In formula (1), R1, R2, and R3 each independently are a hydrogen atom or a Cl-4 alkyl group, A is a C2-4 alkylene group, and m and n are each independently 1.0-50. The number average molecular weight of the polymer is 10,000 or less, and the IOB value of the polymer is 0.4-1.8.