Nail Gel Builder Composition with Self-Leveling Resins
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Solution Overview
Problem
Existing nail builder compositions, such as acrylic and hard gels, are difficult to apply, require multiple tools, and can damage natural nails during removal, while soft gels lack the strength and durability of harder options.
Innovation Solution
A radiation-curable gel composition with a specific formulation of Acrylates/Carbamate copolymer, Urethane Dimethacrylate, Isopropylidenediphenyl Bisoxyhydroxypropyl Methacrylate, and Isophorone Diisocyanate, which is self-leveling, easy to apply with a brush, and cures without high heat spikes, offering high tensile strength and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hard gel or acrylic builder compositions are used to provide strength and durability, then the nail builder has high strength and durability, but the application becomes difficult and requires multiple tools with cleanup and sanitizing
Solution Approach 1:
The patent modifies the chemical composition parameters by incorporating specific resin systems (urethane acrylate, polyester acrylate) and controlling molecular weight and viscosity to achieve a balance between strength and ease of application. The gel composition is formulated with specific viscosity ranges and molecular structures that allow easy application while maintaining high tensile strength after curing.
Solution Approach 2:
The patent uses composite gel formulations combining multiple resin types (urethane acrylate, polyester acrylate, epoxy acrylate) with specific monomers and oligomers to create a material that exhibits both ease of application and high strength properties. This composite approach allows the gel to flow easily during application then develop superior strength upon UV/LED curing.
2Strength
If hard gel builder compositions are used to create nail length, then the nail builder provides strength and durability, but the viscosity variances make it difficult to control application requiring skilled application
Solution Approach 1:
The patent carefully controls viscosity parameters within specific ranges (500-5000 cP) and adjusts molecular weight of resin components to ensure consistent flow characteristics. This parameter control allows the gel to be applied easily without requiring skilled technique while maintaining uniform thickness and quality across different applications.
3Strength
If acrylic nail builder compositions are used to provide superior strength, then the nail builder has high strength, but the removal process is abrasive and can damage the natural nail
Solution Approach 1:
The patent replaces the mechanical removal process (abrasive filing) with a chemical dissolution process. The gel composition is formulated with specific resin systems that can be broken down and removed by soaking in acetone or other solvents, eliminating the need for abrasive filing that damages the natural nail while maintaining the strength benefits of a cured gel structure.
4Ease of operation
If soft gel compositions are used to provide easy application and flexible removal, then the nail builder is easy to apply and remove, but the composition lacks the strength and durability of hard gel
Solution Approach 1:
The patent creates a composite gel formulation that combines the ease of application of soft gels with the strength of hard gels by integrating multiple resin systems (urethane acrylate for flexibility, polyester acrylate for strength, epoxy acrylate for adhesion) in specific ratios. This composite structure allows the gel to remain workable during application then develop high strength upon curing.
Solution Approach 2:
The patent adjusts molecular weight, crosslink density, and resin composition parameters to achieve a gel that maintains flexibility and ease of application during the uncured state while developing high tensile strength (greater than 10 MPa) after UV/LED curing. The specific parameter ranges are optimized to balance workability and final strength.
5Ease of operation
If conventional soft gels are used to provide easy application with brush, then the nail builder requires little training, but the composition lacks the strength and durability characteristics of hard gel
Solution Approach 1:
The patent formulates a composite gel system combining multiple durable resin components (urethane acrylate, polyester acrylate, epoxy acrylate) with appropriate monomers and oligomers to achieve both ease of brush application and extended wear duration of 14 days or longer. The composite structure provides flexibility for easy application while ensuring long-lasting durability.
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 solution provides a strong, flexible, and easy-to-apply nail builder that minimizes discomfort during application and removal, with superior self-leveling properties and long wear up to 14 days, eliminating the need for abrasive filing and specialized tools.
Implementation Method 1
Soft gels are premixed semi-solid monomers and oligomers that, after coating, will harden into polymers when exposed to UV-A light
Data Source
AI summary
A UV curable gel composition adapted to be applied to a nail with a brush to build and extend the nail comprising one or more acrylate/carbamate copolymer resins, one or more urethane methacrylate oligomers of di-functionality, one or more methacrylate resins, one or more Isophorone Diisocyanate end-capped with Hydroxyethyl Methacrylate resins, one or more ethylenically unsaturated mono functional monomers, a photoinitiator and at least one acid-based adhesion promotor wherein the composition having a viscosity of about 11,000 centipoise to about 14,000 centipoise and a specific gravity of less than about 1.2. The invention includes an applicator kit for the composition and methods of its use.