Water-Based Nail Coating Resin Composition
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Solution Overview
Problem
Current nail coating technologies face challenges such as toxicity from organic solvents, poor adhesion, and safety concerns, with existing solutions either lacking sufficient adhesion or causing physiological irritancy, and failing to provide long-lasting, scratch-resistant coatings.
Innovation Solution
A curable resin composition comprising an aqueous emulsion of a polymer with functional groups polymerizable by active energy radiation, polyethylene glycol, and a photo radical initiator without nitrogen, which enhances adhesion and reduces irritancy while ensuring safety and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If organic solvent-based keratin coating materials are used, then the coating surface exhibits excellent gloss in a short time, but the user directly inhales evaporating organic solvents causing toxicity and health adverse effects
Solution Approach 1:
The patent changes the fundamental parameter of the coating system from organic solvent-based to water-based formulation. This parameter change eliminates the evaporation of harmful organic solvents while maintaining the ability to form a glossy coating surface through water evaporation and polymer emulsion drying mechanisms
Solution Approach 2:
The patent uses water as the temporary medium that evaporates harmlessly during drying, replacing the need for persistent organic solvents. The water-based emulsion system allows the coating to dry through water evaporation without leaving harmful residues, effectively using a safe, disposable medium instead of toxic one
2Reliability
If non-reactive polymer compositions are used, then the coating formation involves no chemical reaction providing high storage stability and low physiological irritancy, but the coating cannot be tough and peels off readily by external forces
Solution Approach 1:
The patent employs a composite system combining water-based polymer emulsions with cross-linking agents. This composite approach allows the coating to initially benefit from the stability of non-reactive emulsions during storage, then develop cross-linked networks upon application that provide enhanced toughness and adhesion resistance to external forces
Solution Approach 2:
The patent prepares the coating system in advance as a stable water-based emulsion with no chemical reactions occurring during storage. The cross-linking action is delayed until application to the nail surface, where moisture or other triggers initiate the cross-linking reaction to form tough networks only when needed, preserving storage stability while achieving coating strength
3Strength
If reactive curable resin compositions are used, then a tough coating composed of chemically cross-linked polymer is formed, but the chemical reaction proceeds gradually during storage resulting in poor preservability and causes physical irritation
Solution Approach 1:
The patent prepares the reactive components in a stable, non-reacting state during storage. The cross-linking reaction is triggered only after application to the nail surface through exposure to moisture or other environmental factors, preventing gradual reaction during storage that would compromise preservability while still achieving tough cross-linked coating
Solution Approach 2:
The patent introduces moisture or environmental triggers as intermediaries that initiate cross-linking only when the coating is applied to the nail. This intermediary mechanism allows the coating to remain stable during storage and then activate cross-linking behavior only when needed, preventing premature reaction while achieving desired toughness
4Ease of manufacture
If conventional keratin coating materials are used, then the coating can be formed, but it must be wiped off with large amount of organic solvent having strong odor and adverse effect on user's health
Solution Approach 1:
The patent fundamentally changes the removal mechanism from organic solvent-based to water-based. The water-based emulsion coating is removed by wiping with water or mild cleansers, eliminating the need for strong organic solvents and their associated odors and health effects
Solution Approach 2:
The patent converts the traditional harmful removal process into a beneficial one by using water, which is safe and environmentally friendly. The water-based formulation allows for easy, safe removal without the need for harsh chemicals, turning a potentially harmful process into a safe and convenient one
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 composition achieves excellent water and scratch resistance, low odor, and dermal safety, resulting in a long-lasting, safe, and effective nail coating that does not require hazardous labeling, with superior storage stability and appearance.
Implementation Method 1
a curable resin composition for coating a natural or artificial nail comprising (A) an aqueous emulsion of a polymer having functional groups polymerizable by exposure to active energy radiation, (B) polyethylene glycol, and (C) a photo radical initiator
Data Source
AI summary
The present invention provides a curable resin composition for coating natural or artificial nails, which in particular exhibits an excellent appearance after coating, high water and scratch resistances, and low levels of odor, damage to nails, and dermal irritancy, resulting in a high level of safety to human bodies and superior storage stability. The curable resin composition for coating a natural or artificial nail of the present invention comprises (A) an aqueous emulsion of a polymer having functional groups polymerizable by exposure to active energy radiation, (B) polyethylene glycol, and (C) a photo radical initiator containing no nitrogen atom in its molecule.