Condensation-Cured Silicone Compositions for Shine Without Oily Feel

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Solution Overview

Problem

There is a need for silicone materials that provide improved care for keratinous substrates with enhanced aesthetics, such as shiny hair appearance without an oily feel, better in-use experience, and improved coverage of wrinkles and pores, while maintaining stability and moisturization.

Innovation Solution

Cosmetic compositions comprising silicone materials cured via condensation cure chemistry, incorporating a condensation curable silyl terminated polymer, a cross-linker, and a condensation catalyst, with specific molar ratios and optional diluents, to achieve varying viscosities and consistencies for applications like shampoos, conditioners, and skin care creams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If silicone materials are used to provide shiny appearance on keratinous substrates, then aesthetic appearance is improved, but oily feel and look worsen

Engineering Contradiction:

Improveshiny appearanceVSAvoidoily feel

Core Design Contradiction:

Illumination intensityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical parameters of silicone materials by using condensation cured silicone materials with specific hydroxyl number ranges (50-200 mg KOH/g) and controlled molecular weight distributions. This transforms the material properties to provide shine without the characteristic oily feel of conventional silicones, directly resolving the contradiction between aesthetic appearance and sensory comfort

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates composite silicone materials by combining condensation cured silicone polymers with specific crosslinking structures and functional groups. These composite structures integrate the optical benefits of silicones (shine) while eliminating the tactile drawbacks (oily feel) through controlled crosslinking density and hydroxyl functionality

Inventive Principle:

Principle #40Composite materials

2Reliability

If cosmetic compositions are formulated to provide improved coverage of wrinkles and pores, then cosmetic performance is improved, but formulation stability worsens

Engineering Contradiction:

Improvecosmetic performanceVSAvoidformulation stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent optimizes the hydroxyl number parameter of condensation cured silicone materials to specific ranges (50-200 mg KOH/g) and controls the molecular weight distribution to achieve optimal balance between cosmetic performance (coverage of skin imperfections) and formulation stability (resistance to phase separation and aggregation). These precise parameter controls resolve the contradiction between efficacy and stability

Inventive Principle:

Principle #35Parameter changes

3Reliability

If silicone materials are used to provide moisturizing effect, then skin care benefits are improved, but in-use experience worsens

Engineering Contradiction:

Improvemoisturizing effectVSAvoidin-use experience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention modifies the physical parameters of silicone materials through condensation curing, achieving specific viscosity ranges and molecular weight distributions that eliminate heavy or sticky sensations during application. The controlled hydroxyl functionality and crosslinking density provide effective moisturization while ensuring lightweight, non-greasy in-use experience

Inventive Principle:

Principle #35Parameter changes

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 compositions offer conditioning benefits, smooth skin feel, and improved cosmetic performance, including SPF boost, while being stable and providing enhanced coverage and moisturization.

Implementation Method 1

silicone materials cured via a condensation cure chemistry (M)... the silicone based material cured via a condensation cure chemistry is the reaction product of: (i) at least one condensation curable silyl terminated polymer having at least one, typically at least 2 hydrolysable and/or hydroxyl functional groups per molecule; (ii) a cross-linker selected from monosilanes having at least 2 hydrolysable groups and/or silyl functional molecules having at least 2 silyl groups, each silyl group containing at least one hydrolysable group; and (iii) a condensation catalyst selected from the group of titanates or zirconates

Methodology Applied

Scientific EffectCondensation reaction:

Implementation Method 2

at least one condensation curable silyl terminated polymer having at least one, typically at least 2 hydrolysable and/or hydroxyl functional groups per molecule

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Data Source

PatentEP3493878B1Cosmetic composition comprising cured silicone materials

Publication Date: 2025.10.08 DOW SILICONES CORP

AI summary

The present invention relates to cosmetic compositions comprising silicone based materials cured via a condensation cure chemistry. In particular, the present disclosure relates to cosmetic compositions comprising a silicone based gel cured via a condensation cure chemistry; and at least one cosmetic ingredient, in a cosmetically acceptable medium. The present invention also relates to preparation methods and uses of said cosmetic compositions.