Copolymer Oily Gelling Agent Temperature Stability
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Solution Overview
Problem
Conventional oily gelled compositions, particularly those using triglycerides derived from palmitic and behenic acids, face challenges in stability and temperature stability, necessitating improvements in their formulation.
Innovation Solution
A copolymer comprising specific hydrophobic and hydrophilic monomers, such as cetyl (meth)acrylate and N-(2-hydroxyethyl)acrylamide, is developed to enhance the stability of oily gelled compositions by adjusting the monomer proportions, forming a stable oily gelling agent that maintains gelation properties across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional triglycerides derived from palmitic and behenic acids are used as oily gelling agents, then the gelled composition can be formed, but the stability and temperature stability are insufficient
Solution Approach 1:
The patent applies composite materials by combining hydrophobic monomers (having alkyl groups with 16-22 carbon atoms) and hydrophilic monomers (containing hydroxyl groups or carboxyl groups) to form a copolymer gelling agent. This composite structure enables the material to achieve both oil compatibility through hydrophobic interactions and temperature stability through hydrophilic interactions, resolving the contradiction between formability and stability of oily gelled compositions.
2Reliability
If the proportion of hydrophobic and hydrophilic monomers is adjusted in the copolymer, then the gelation properties and temperature resistance are improved, but the formulation complexity increases
Solution Approach 1:
The patent applies parameter changes by optimizing the proportion of hydrophobic and hydrophilic monomers in the copolymer formulation. Specifically, the hydrophobic monomer content is controlled at 30-70 mol% and hydrophilic monomer at 20-50 mol%, with the remaining content being other compatible monomers. This parameter optimization achieves effective gelation and temperature resistance (maintaining gel properties up to near 60°C) while managing formulation complexity through defined compositional ranges.
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 copolymer achieves significant improvements in stability and temperature resistance, ensuring effective gelation and compatibility with oils, suitable for use in cosmetics and emulsion cosmetics without causing stickiness, and maintains gel properties up to near 60°C.
Implementation Method 1
a copolymer, comprising both a specific hydrophobic monomer and a specific hydrophilic monomer, achieves to provide an extremely stable oily gelled composition
Implementation Method 2
the copolymer acts an oily gelling agent... maintains gelation properties across varying temperatures... maintains gel properties up to near 60°C
Implementation Method 3
a hydrophilic monomer having the following general formula (2) or the following general formula (3)... R3 is one selected from a group consisting of hydrogen atom, glyceryl group, a hydroxyalkyl group having straight-chained or branched carbon chain containing 1 to 4 carbon atoms
Data Source
AI summary
Copolymers derived from hydrophobic monomers of formula (1), and hydrophilic monomers of formulas (2) and (3), are providedThe copolymers are useful as gelling agents for oils used in cosmetics and cosmetic emulsions.