Block Copolymer Composition with Nonvolatile Ester Oil

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Solution Overview

Problem

Conventional cosmetic compositions for skin and lips using film-forming polymers often contain volatile oils, which cause discomfort, reduce gloss, and impose packaging and processing challenges due to evaporation and compatibility issues with solid fatty substances.

Innovation Solution

A composition combining a film-forming block copolymer with nonvolatile ester oils, specifically a physiologically acceptable medium containing an ethylenic block copolymer and a nonvolatile hydrocarbon ester oil, reducing volatile oil content to enhance comfort, gloss, and hold on keratinous substances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If volatile oils are used as polymerization solvent for film-forming polymers, then the hold of the composition on keratinous substances is improved, but the gloss of the deposited layer is reduced and discomfort feelings occur

Engineering Contradiction:

Improvehold of lipstick on lipsVSAvoidfeeling of discomfort and reduced gloss

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the key parameter from volatile oil to nonvolatile ester oil, fundamentally altering the evaporation behavior and sensory properties of the composition while maintaining the film-forming capability and hold on lips

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the harmful effect of volatile oil evaporation (causing discomfort and gloss loss) into a benefit by using nonvolatile ester oil, which provides the same solvent and film-forming functions without the negative sensory effects

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Ease of manufacture

If volatile oils with flash point less than 80°C are used, then the polymer can be synthesized in the presence of the solvent, but the composition requires leaktight packaging to prevent evaporation during storage

Engineering Contradiction:

Improvepolymerization processVSAvoidpackaging requirements

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent changes the flash point parameter from less than 80°C to greater than 80°C by substituting volatile oil with nonvolatile ester oil, thereby eliminating the need for special leaktight packaging while maintaining polymerization capability

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If solid fatty substances with high melting point are added to the composition, then the composition can be formulated with these substances, but heating temperature must exceed the flash point of the volatile oil

Engineering Contradiction:

Improveformulation flexibilityVSAvoidheating temperature

Core Design Contradiction:

Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent changes the flash point parameter from less than 80°C to greater than 80°C by using nonvolatile ester oil, thereby enabling the heating of solid fatty substances to temperatures above 80°C without safety concerns, improving formulation flexibility

Inventive Principle:

Principle #35Parameter changes

4Quantity of substance

If large amount of volatile oil (greater than 10%) is present in the composition, then the polymer can be adequately solvated, but the deposited layer exhibits reduced gloss and causes feeling of dryness and tightness

Engineering Contradiction:

Improvesolvent contentVSAvoidfeeling of dryness and tightness

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful effect of high volatile oil content (causing dryness and tightness) into a benefit by using nonvolatile ester oil, which provides adequate solvation and film formation without the negative sensory effects even at similar concentrations

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS9895561B2Composition containing a block polymer and a nonvolatile ester oil

Publication Date: 2018.02.20 LOREAL SA

AI summary

Composition for making up and/or caring for keratinous substances containing a block copolymer and a nonvolatile hydrocarbon ester oil.