Cucurbituril Cosmetic Formulation Viscosity Stabilization

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Solution Overview

Problem

Cosmetic compositions containing hydrogenated cucurbic acid compounds experience significant viscosity reduction, leading to fluidization and destabilization, making them difficult to apply to keratin materials and affecting the thickening capacity of gelling agents.

Innovation Solution

A composition comprising cucurbic acid compound, a homopolymer with a sulfonic group, and a crosslinked acrylic acid homopolymer is used, maintaining stability and preventing substantial fluidization, ensuring a non-tacky sensation upon application.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hydrogenated cucurbic acid compounds are introduced into aqueous cosmetic formulation, then the composition provides skin care benefits, but the viscosity decreases substantially causing fluidization and destabilization

Engineering Contradiction:

Improvestability of compositionVSAvoidviscosity stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

A specific gelling agent comprising a blend of polymers is introduced as an intermediary substance to mediate between the cucurbic acid compound and the aqueous medium. This gelling agent prevents the harmful fluidization effect while allowing the beneficial skin care properties to manifest.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The viscosity and stability parameters of the formulation are modified by optimizing the concentration and composition of the gelling agent blend, transforming the system from an unstable fluidized state to a stable gel state with appropriate rheological properties.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If conventional gelling agents are used with cucurbic acid compounds, then the composition can be formulated, but the thickening capacity is affected and viscosity drops

Engineering Contradiction:

ImproveformulabilityVSAvoidthickening capacity

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

Instead of using a single conventional gelling agent, the invention employs a composite gelling system consisting of a specific blend of polymers with complementary properties. This composite approach allows the formulation to maintain both manufacturability and thickening capacity despite the presence of cucurbic acid compounds.

Inventive Principle:

Principle #40Composite materials

3Ease of manufacture

If the composition becomes too fluid, then it is easy to mix and formulate, but it runs on keratin materials and application lacks precision

Engineering Contradiction:

ImprovemixabilityVSAvoidapplication precision

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The formulation achieves dynamic rheological properties through the gelling agent blend, allowing it to maintain stability during storage and mixing while providing controlled flow and non-running characteristics during application to keratin materials.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS8883125B2Cosmetic composition comprising a cucurbic acid compound and a blend of sulfonic and acrylic polymers

Publication Date: 2014.11.11 LOREAL SA

AI summary

The invention relates to a cosmetic composition comprising, in a physiologically acceptable aqueous medium, a cucurbic acid compound of formula (I)in which R1 represents a radical COOR3, R3 denoting a hydrogen atom or a C1-C4 alkyl radical, optionally substituted with one or more hydroxyl groups;R2 represents a hydrocarbon-based radical containing from 1 to 18 carbon atoms;a homopolymer of a monomer comprising a sulfonic group;and a crosslinked acrylic acid homopolymer.Use for caring for and making up keratin materials.