UV Filter Combination with Piperazine Derivatives for Washability
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Solution Overview
Problem
Existing sunscreens often leave residues on clothing, making them difficult to wash off and leading to environmental pollution and increased wear and tear on textiles.
Innovation Solution
A cosmetic preparation combining 2-phenylbenzimidazole-5-sulfonic acid, a piperazine derivative, dibenzoylmethane, and other ingredients, which provides excellent UV-A protection, photostability, and improved washability, reducing stickiness and enhancing skin moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sunscreen preparations are applied to the skin, then UV protection is provided, but residues are transferred to clothing and difficult to wash off
Solution Approach 1:
The patent modifies the chemical parameters of the sunscreen formulation by selecting specific UV filters with optimized molecular structures and concentrations. The combination of filters (a)-(d) with defined molar ratios creates a formulation that maintains UV protection while reducing adhesion to textiles through altered solubility and binding characteristics.
Solution Approach 2:
The invention uses a composite UV filter system combining four different types of filters (benzimidazole sulfonic acid, piperazine derivative, dibenzoylmethane, and compound 2) in specific proportions. This composite approach balances the conflicting requirements of UV efficacy and washability, as each component contributes differently to protection and textile interaction.
2Reliability
If cosmetic preparations contain lipophilic components for UV protection, then skin protection is improved, but visual contamination of light-colored clothing increases
Solution Approach 1:
The patent applies local quality by using different types of UV filters with varying properties in specific combinations. The lipophilic filters provide skin protection while the hydrophilic components reduce textile staining, creating a formulation with spatially differentiated functional zones at the molecular level.
Solution Approach 2:
The invention changes the overall polarity parameter of the formulation by balancing lipophilic and hydrophilic components. This parameter adjustment reduces the strong adhesion to textile fibers while maintaining adequate skin protection, thereby minimizing visible staining of light-colored clothing.
3Ease of operation
If conventional sunscreens are washed repeatedly at higher temperatures, then residues are removed from clothing, but environmental pollution and textile wear increase
Solution Approach 1:
The patent creates a sunscreen formulation designed for single-use effectiveness with complete washability. The formulation is optimized to be fully removable in one washing cycle, eliminating the need for repeated washing and thereby reducing environmental pollution and textile wear associated with multiple washings.
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 combination effectively protects skin from UV damage, is easy to wash off from clothing, and maintains stability and cosmetic properties, reducing environmental impact and textile wear.
Implementation Method 1
a combination of UV filters to protect the skin... excellent UV-A protection... 2-phenylbenzimidazole-5-sulfonic acid, a compound 1 with the structure... a dibenzoylmethane derivative, and d) a compound 2
Data Source
AI summary
Cosmetic preparation containing a UV-filter combination made up of a) 2-phenylbenzimidazole-5-sulphonic acid and/or the salts thereof, b) a compound (1) of structure: where R1 and R1' are independently in the para or meta position and independently = H, straight- or branched-chain C1-C8 alkyl, R2 = C1-C12 alkyl and R3= H or CN, c) a dibenzoylmethane derivative and d) a conmpound (2) of structure: compound (2).