Cyanoacrylate Cosmetic Adhesive With Catechol for Moisture-Resistant Bonding
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Solution Overview
Problem
Existing adhesives for cosmetic articles have low bond strength, leading to premature detachment from keratin-containing substrates.
Innovation Solution
A cyanoacrylate-based adhesive composition with 0.05% to 5% substituted catechol group additives, enhancing bond strength to at least 130 gF/mm between keratin-containing substrates and cosmetic articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesives are used to bond cosmetic articles to keratin-containing substrates, then the application process is simple, but the bond strength is low leading to premature detachment
Solution Approach 1:
The patent modifies the chemical composition parameters of the adhesive by incorporating substituted catechol groups (such as tannic acid, caffeic acid, or ferulic acid) at specific concentrations (0.01-5% by weight). This chemical parameter change transforms the adhesive properties to achieve bond strength of at least 130 gF/mm while maintaining application simplicity.
Solution Approach 2:
The invention creates a composite adhesive system by combining conventional cyanoacrylate or polyurethane adhesive base materials with substituted catechol compounds. This composite formulation synergistically enhances bond strength and attachment durability while preserving the ease of application characteristic of conventional adhesives.
2Reliability
If adhesive composition is optimized for high bond strength, then attachment durability improves, but the complexity of adhesive formulation increases
Solution Approach 1:
The patent establishes specific parameter ranges for the substituted catechol content (0.01-5% by weight) to achieve optimal bond strength without requiring complex formulation processes. This parameter optimization ensures high attachment durability while maintaining relatively simple adhesive composition suitable for at-home application.
3Duration of action of moving object
If bond strength is increased to prevent premature detachment, then wear time extends, but the adhesive may become more sensitive to environmental conditions
Solution Approach 1:
The composite adhesive formulation incorporating substituted catechol groups creates a more robust bonding interface that maintains high bond strength (at least 130 gF/mm) and extended wear time while demonstrating reduced sensitivity to environmental conditions such as moisture and temperature variations compared to conventional adhesives.
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 adhesive composition provides a significant increase in bond strength, allowing for longer wear times of cosmetic articles, even under moist conditions, and is suitable for at-home application.
Implementation Method 1
The adhesive composition includes a cyanoacrylate composition and from 0.05% to 5% by weight an additive composition comprising at least one substituted catechol group
Data Source
AI summary
A method of applying a cosmetic article. The method includes applying an adhesive composition to at least one of a keratin-containing substrate and a cosmetic article. The method includes positioning the other of the keratin-containing substrate and cosmetic article in direct contact with the adhesive composition such that the keratin-containing substrate and cosmetic article are attached to one another through the adhesive composition. The adhesive composition includes a cyanoacrylate composition, and from 0.05% to five % by weight an additive composition comprising at least one substituted catechol group, based on the total weight of the adhesive composition.