Medicated Patch Hexyl Laurate Ultraviolet Absorbent Migration
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Solution Overview
Problem
Conventional patches face issues with insufficient migration of ultraviolet absorbents to the skin, reduced adhesiveness, and discoloration of the adhesive base, particularly when using soybean lecithin as a skin-migration promoter for preventing dermatitis caused by excessive light irradiation.
Innovation Solution
A patch comprising an adhesive base with ketoprofen, tiaprofenic acid, tolmetin, 4-tert-butyl-4'-methoxydibenzoylmethane, hexyl laurate, and polyterpene resin, where hexyl laurate acts as a mediator to enhance the migration of ultraviolet absorbents to the skin, maintaining adhesiveness and preventing photodecomposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ultraviolet absorbent is used in a patch to prevent dermatitis caused by light irradiation, then the protective effect against dermatitis is improved, but the migration of the ultraviolet absorbent to the skin is insufficient
Solution Approach 1:
The patent introduces hexyl laurate as an intermediary substance that facilitates the migration of the ultraviolet absorbent (4-tert-butyl-4'-methoxydibenzoylmethane) to the skin. Hexyl laurate acts as a mediator between the ultraviolet absorbent and the skin, enabling efficient transfer of the absorbent to the skin surface where it can provide photoprotective effects.
Solution Approach 2:
The patent optimizes the concentration parameters of key components: hexyl laurate (0.1-10 mass%), 4-tert-butyl-4'-methoxydibenzoylmethane (0.01-5 mass%), and polyterpene resin (1-20 mass%). By adjusting these parameters within specific ranges, the formulation achieves optimal balance between ultraviolet absorbent migration efficiency and prevention of dermatitis.
2Speed
If soybean lecithin is used as a skin-migration promoter for ultraviolet absorbent, then the migration of ultraviolet absorbent to skin is improved, but the adhesiveness of the patch is reduced and the adhesive base discolors
Solution Approach 1:
The patent extracts and eliminates soybean lecithin from the formulation, removing the substance that causes adhesive base discoloration and adhesiveness reduction. Instead, it introduces hexyl laurate as an alternative skin-migration promoter that does not exhibit these adverse effects, thereby maintaining patch adhesiveness while still promoting ultraviolet absorbent migration.
Solution Approach 2:
The patent replaces soybean lecithin with hexyl laurate, which serves as a more stable and reliable skin-migration promoter. Hexyl laurate does not cause the discoloration or adhesiveness loss associated with soybean lecithin, providing a more durable and effective formulation.
3Reliability
If the adhesive base contains substances to promote ultraviolet absorbent migration, then the protective effect is improved, but the adhesive base discolors over time
Solution Approach 1:
The patent uses hexyl laurate as an intermediary that promotes ultraviolet absorbent migration without causing adhesive base discoloration. Unlike soybean lecithin, hexyl laurate remains chemically stable and does not undergo reactions that lead to color changes in the adhesive base, maintaining both protective efficacy and aesthetic appearance.
Solution Approach 2:
The patent replaces soybean lecithin with hexyl laurate, which provides stable long-term performance without discoloration. This substitution ensures the adhesive base maintains its original color and properties over time while still achieving the desired skin-migration enhancement.
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 patch effectively suppresses dermatitis caused by excessive light irradiation while maintaining anti-inflammatory and analgesic effects without adhesiveness reduction or discoloration, providing a safe and effective medicament.
Implementation Method 1
lipophilic hexyl laurate having an ester linkage may serve as a mediator between the extremely lipophilic ultraviolet absorbent and the water-containing corneum of the skin, thereby increase the distribution of the ultraviolet absorbent to the skin
Implementation Method 2
the ultraviolet absorbent blocks the anti-inflammatory agent from the light not only in the preparation, but also in the skin
Implementation Method 3
an excessive light irradiation may induce dermatitis, etc., due to the effect of photodecomposition reaction of anti-inflammatory agents
Data Source
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AI summary
A conventional medicated patch containing an anti-inflammatory agent causes a dermatitis or the like on rare occasion by excess irradiation with light. For overcoming the problem, a medicated patch is provided, which comprises an anti-inflammatory agent, BM-DBM as an ultraviolet absorber, and hexyl laurate as an agent for accelerating the migration of the ultraviolet absorber into the skin in an adhesive base material thereof.