Aqueous Suncare Formulation With Sulfated Crystalline Cellulose SPF Boosting

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Solution Overview

Problem

Existing sunscreen formulations face challenges in achieving high SPF ratings while minimizing the use of suncare actives, which can have adverse toxicological and sensory effects, and require improvements in water resistance and retention of actives during use.

Innovation Solution

Incorporating a sulfated crystalline cellulose SPF booster into aqueous suncare formulations to enhance SPF performance and thicken the formulation, thereby reducing the need for higher levels of suncare actives.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the level of suncare actives is increased to achieve high SPF ratings, then SPF protection is improved, but adverse toxicological effects and negative sensory effects worsen

Engineering Contradiction:

ImproveSPF protectionVSAvoidadverse toxicological effects and negative sensory effects

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Sulfated crystalline cellulose acts as an intermediary substance that enhances the performance of suncare actives. It boosts SPF ratings and provides thickening effects, allowing reduced levels of suncare actives while maintaining protection. The mediator enables the system to achieve high SPF with lower concentrations of potentially harmful active ingredients.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention changes the physical and chemical parameters of the formulation by introducing sulfated crystalline cellulose, which alters the rheological properties (thickening) and SPF performance. This parameter change allows the formulation to achieve high SPF protection with reduced suncare active levels, resolving the contradiction between protection efficacy and harmful effects.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If the level of suncare actives is reduced to minimize adverse effects, then toxicological effects are reduced, but SPF protection deteriorates

Engineering Contradiction:

Improveadverse toxicological effectsVSAvoidSPF protection

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

Sulfated crystalline cellulose serves as a performance-enhancing intermediary that compensates for reduced suncare active levels. It provides SPF boosting effects that allow the formulation to maintain adequate protection even when suncare active concentrations are lowered to minimize toxicological concerns.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If conventional sunscreen formulations are used, then SPF protection is provided, but water resistance and retention of suncare actives during use are insufficient

Engineering Contradiction:

ImproveSPF protectionVSAvoidwater resistance and retention of suncare actives

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

Sulfated crystalline cellulose acts as a stabilizing intermediary that enhances water resistance and improves the retention of suncare actives during use. Its thickening properties and interaction with other formulation components create a more stable system that resists water loss and maintains active ingredient placement on the skin.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 sulfated crystalline cellulose effectively boosts SPF and thickens the formulation, providing effective sun protection with reduced active ingredients and improved water resistance.

Implementation Method 1

a suncare active and a sulfated crystalline cellulose SPF booster wherein the sulfated crystalline cellulose SPF booster both boosts the SPF of the aqueous suncare formulation

Methodology Applied

Scientific EffectUV absorption: Absorption (EM radiation)

Implementation Method 2

the sulfated crystalline cellulose SPF booster both boosts the SPF of the aqueous suncare formulation and thickens the aqueous suncare formulation

Methodology Applied

Scientific EffectThickening:

Data Source

PatentUS12453690B2Aqueous suncare formulation

Publication Date: 2025.10.28 ROHM & HAAS CO

AI summary

An aqueous suncare formulation is provided, including: a cosmetically acceptable aqueous carrier; a suncare active; and a sulfated crystalline cellulose SPF booster; wherein the sulfated crystalline cellulose SPF booster both boosts the SPF of the aqueous suncare formulation and thickens the aqueous suncare formulation.