UV-blocking cosmetic composition with spherical titanium dioxide

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Solution Overview

Problem

Conventional UV blocking cosmetic compositions with high inorganic UV blocking agents cause tackiness and stickiness on the skin, and are difficult to pack in sponges due to increased viscosity, while organic agents have stability issues and low long-term use.

Innovation Solution

A UV blocking cosmetic composition using spherical titanium dioxide microparticles with a particle diameter larger than 70 nm and low oil absorption, which provides a high sun protection factor and fresh feel on the skin, and can be easily packed in a sponge for portability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large amount of inorganic UV blocking agents is used to provide high UV blocking effect, then UV blocking performance is improved, but the cosmetic composition shows tackiness and stickiness on the skin

Engineering Contradiction:

ImproveUV blocking effectVSAvoidtackiness and stickiness

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the particle size parameter of titanium dioxide to larger than 70 nm and controls oil absorption to 0.5 or less, which fundamentally alters the physical properties of the UV blocking agent to eliminate stickiness while maintaining UV protection

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite system by combining titanium dioxide with specific surfactants and oils, where the surfactant concentration (0.1-10% by weight) and oil content (1-30% by weight) are optimized to work synergistically with the titanium dioxide particles to reduce surface adhesion and eliminate tackiness

Inventive Principle:

Principle #40Composite materials

2Reliability

If a high content of inorganic UV blocking agents is contained to provide high UV blocking effect, then UV protection is improved, but viscosity increases making it difficult to pack in sponges

Engineering Contradiction:

ImproveUV blocking effectVSAvoidpackability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the particle size parameter of titanium dioxide to larger than 70 nm, which reduces interparticle friction and viscosity, enabling the high-concentration UV blocking composition to be easily packed into sponge carriers

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces surfactants as intermediary substances that mediate between the inorganic UV blocking agents and the carrier system, reducing surface tension and facilitating smooth packing into sponges without increasing viscosity

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-generated harmful factors

If organic UV blocking agents are used to avoid stickiness, then skin feel is improved, but the agents are precipitated when stored for long time showing low stability

Engineering Contradiction:

ImprovestickinessVSAvoidstorage stability

Core Design Contradiction:

Object-generated harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent creates a stable composite system by combining inorganic titanium dioxide particles with specific surfactants and oils, achieving both non-sticky skin feel and long-term storage stability through synergistic interactions among the components

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent optimizes the particle size parameter of titanium dioxide to larger than 70 nm and controls oil absorption to 0.5 or less, preventing aggregation and precipitation during long-term storage while maintaining non-sticky properties

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 composition offers a high sun protection factor, improved skin feel, and enhanced packability, maintaining a fresh and non-sticky texture while ensuring high UV blocking efficacy and ease of use in a portable sponge format.

Implementation Method 1

UV blocking agents are classified into organic UV blocking agents and inorganic UV blocking agents

Methodology Applied

Scientific EffectUV blocking: Absorption (EM radiation)

Implementation Method 2

titanium dioxide having a specific shape

Methodology Applied

Scientific EffectLight scattering: Scattering

Implementation Method 3

since such titanium dioxide microparticles have a low oil absorption of 0.5 or less, which is lower as compared to the other UV blocking agents

Methodology Applied

Scientific EffectOil absorption: Absorption (physical)

Data Source

PatentEP3318245B1UV-blocking cosmetic composition

Publication Date: 2021.02.24 AMOREPACIFIC CORP

Figure 1

AI summary

The UV-blocking cosmetic composition according to the present invention is not sticky, when applied to the skin, by comprising spherical titanium dioxide particles having a diameter of over 70 nm, even if large quantities of same are comprised in the composition. Accordingly, the composition has a high sun protection factor, high coverage, and excellent adhesion and can provide a fresh feel. Further, when filled in a carrier including a sponge, the composition facilitates moisture absorption into the sponge and thus exhibits an excellent filling capability. Therefore, the UV-blocking cosmetic composition according to the present invention can be provided in a formulation impregnated in a sponge and thus has excellent portability.