Cellulose-Derived Sunscreen Capsules for Water-Resistant Skin Protection

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Solution Overview

Problem

Conventional sunscreens often fail to provide effective and long-lasting protection against UV radiation due to issues like uneven application, loss of coverage from activities such as swimming or sweating, and an oily feel that users find unacceptable.

Innovation Solution

The development of sunscreen compositions using cellulose-derived encapsulates that contain sunscreen active agents, which provide a higher SPF and remain effective even after rinsing, by utilizing a cationic polymer to adhere to the skin and hair, and incorporating additional agents like oils, emollients, and film formers for enhanced protection and comfort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional sunscreen products are applied to skin, then UV protection is provided, but the product feels oily and provides uneven coverage

Engineering Contradiction:

ImproveUV protection effectivenessVSAvoidapplication uniformity and skin feel

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent uses cellulose-derived capsules as flexible shells to encapsulate sunscreen active agents. These capsules provide a thin film structure that improves application uniformity and eliminates the oily feel while maintaining UV protection effectiveness. The capsule shell allows controlled release and even distribution of the active agent on skin surface.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent creates composite material systems by combining cellulose-derived capsules with sunscreen active agents, cationic polymers, and other functional ingredients. This composite approach enables simultaneous achievement of uniform application, non-oily skin feel, and reliable UV protection through synergistic interactions between components.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If sunscreen active agents are incorporated in body washes and shampoos for convenient use, then regular application is improved, but adequate protection is lost due to rinsing away

Engineering Contradiction:

Improveconvenience of useVSAvoidsunscreen protection durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent incorporates sunscreen active agents encapsulated in cellulose-derived capsules into body washes and shampoos before use. The capsules are pre-formulated to provide sustained release of the active agent during and after rinsing, ensuring adequate protection is maintained even after the product is washed off. This preliminary encapsulation action enables both convenience and durability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The cellulose-derived capsules provide continuous release of sunscreen active agents over time, maintaining protective levels on the skin even after rinsing. This continuous action ensures that the sunscreen protection does not abruptly end when the body wash or shampoo is rinsed away, thereby maintaining reliability while preserving ease of use.

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If higher concentration of sunscreen active agents is used to increase SPF, then UV protection is improved, but the product becomes less comfortable and more difficult to apply

Engineering Contradiction:

ImproveSPF valueVSAvoidapplication ease and skin comfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The cellulose-derived capsules act as flexible shells that can encapsulate high concentrations of sunscreen active agents while maintaining a thin, non-greasy film on the skin. This capsule structure allows high SPF values to be achieved without the unpleasant sensory effects associated with high concentrations of free sunscreen agents, thereby resolving the contradiction between protection effectiveness and application comfort.

Inventive Principle:

Principle #30Flexible shells and thin films

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 encapsulated sunscreen compositions offer prolonged protection against UV radiation, maintaining SPF values and comfort on the skin even after exposure to water or other liquids, and can be conveniently integrated into daily hygiene products like body washes and lotions.

Implementation Method 1

one or more good adhesive polymers that provide a strong binding capability, making it more efficient for deposition of sunscreen

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

sunscreen composition comprising one or more flexible cellulose-derived encapsulates comprising one or more sunscreen active agents

Methodology Applied

Scientific EffectEncapsulation: Physical Containment

Data Source

PatentUS10322301B2Compositions containing a cellulose derived capsule with a sunscreen active agent

Publication Date: 2019.06.18 COLABS INT CORP

AI summary

A sunscreen composition comprised of one or more sunscreen active agents encapsulated in a cellulose derived capsule wherein the composition can contain one or more additional agents. A sunscreen composition can be mixed with a body wash, an after shower body lotion, a shampoo, a conditioner, a soap, a gel, a hand sanitizer, a cream, a spray, a mouse, a lotion, an ointment, a make-up product, a lip balm, a hair spray product, an arachnid/insect repellent or a medicinal product.