Ester-Terminated Poly(Ester-Amide) Polymer Composition for Tacky-Free Makeup
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Solution Overview
Problem
Cosmetic makeup compositions that provide good wear property over time often suffer from a tacky effect and discomfort due to the use of film-forming agents, which is not entirely satisfactory.
Innovation Solution
A composition comprising ester-terminated poly(ester-amide) polymer, volatile alkane, and specific tackifying resins, such as indene hydrocarbon-based resins, along with a particulate phase of pigments, which reduces or eliminates the tacky nature while maintaining excellent wear property.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If film-forming agents are used to improve wear property, then wear property is improved, but tacky effect and discomfort increase
Solution Approach 1:
The invention changes the chemical composition parameters by using ester-terminated poly(ester-amide) polymers with specific molecular weight ranges (1,000 to 10,000 g/mol) and specific functional groups, combined with volatile alkanes and specific tackifying resins, to achieve the desired balance between wear property and reduced tackiness
Solution Approach 2:
The invention creates a composite formulation combining ester-terminated poly(ester-amide) polymer, volatile alkane, tackifying resin, and pigment in specific proportions to achieve synergistic effects that provide both good wear property and reduced tacky effect
2Reliability
If film-forming agents are used to improve wear property, then wear property is improved, but ease of operation deteriorates
Solution Approach 1:
The invention optimizes the molecular weight parameter of the ester-terminated poly(ester-amide) polymer within the range of 1,000 to 10,000 g/mol and adjusts the composition ratios of volatile alkane and tackifying resin to achieve optimal spreadability while maintaining wear property
Solution Approach 2:
The invention uses volatile alkanes that evaporate after application, leaving behind a film that provides wear resistance without the persistent tackiness of traditional film-forming agents
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 achieves a good balance between wear property and reduced tackiness, providing a comfortable and long-lasting makeup effect on the skin.
Implementation Method 1
at least one volatile alkane
Data Source
AI summary
The present invention relates to a composition, especially comprising a physiologically acceptable medium, especially for coating keratin materials, more particularly for making up and/or caring for keratin materials such as the skin, and containing a) at least one ester-terminated poly(ester-amide) polymer; and b) at least one volatile alkane; and c) at least one tackifying resin chosen from the group constituted of indene hydrocarbon-based resins, pentadiene aliphatic resins, cyclopentadiene aliphatic resins, mixed resins of pentadiene and of indene, cyclopentadiene dimer diene resins, isoprene dimer diene resins, hydrogenated resins resulting from the polymerization of pentadiene, hydrogenated resins resulting from the polymerization of cyclopentadiene, and mixtures thereof. and d) a particulate phase comprising at least one pigment. The invention also relates to a process for coating keratin materials, more particularly for making up and/or caring for keratin materials, such as the skin, characterized in that it comprises the application to the keratin materials of a composition as defined previously. The present invention also relates to a cosmetic assembly comprising - a composition as defined previously - a device for applying said composition to the keratin materials.