Photocurable Nail Composition for Wear Resistance and Gloss Retention
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Solution Overview
Problem
Cured products of existing photocurable compositions for nails are prone to scratching and loss of gloss due to external friction, and compositions without polythiol compounds are susceptible to curing inhibition by oxygen, leading to surface deterioration.
Innovation Solution
A photocurable composition comprising a urethane-modified (meth)acrylate oligomer, (meth)acrylates with bisphenol and alicyclic or isocyanurate backbones, and specific (meth)acrylates, with limited or no monofunctional (meth)acrylate content, along with a photoinitiator, to enhance wear resistance and gloss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polythiol compound is added to enhance photocurability and resistance to curing inhibition, then surface curability is improved, but the cured product surface is easily scratched and loses gloss due to external friction
Solution Approach 1:
The patent changes the chemical composition parameters by replacing polythiol compounds with specific (meth)acrylate compounds having cyclic or aromatic rings in their molecular structures. This parameter change maintains the desired photocurability and resistance to curing inhibition while eliminating the surface scratching and gloss loss issues associated with polythiol-containing compositions.
Solution Approach 2:
The patent creates a composite photocurable composition by combining specific (meth)acrylate compounds with cyclic or aromatic rings, urethane-modified (meth)acrylate oligomers, and photopolymerization initiators. This composite material achieves both resistance to curing inhibition and resistance to surface scratching, resolving the contradiction between reliability and surface quality.
2Object-affected harmful factors
If no polythiol compound is used to avoid surface scratching, then surface gloss is maintained, but curing inhibition by oxygen causes uncured components to remain and deteriorate surface curability
Solution Approach 1:
The patent changes the chemical composition by using specific (meth)acrylate compounds with cyclic or aromatic rings instead of polythiol compounds. These compounds provide both resistance to surface scratching and resistance to curing inhibition by oxygen, simultaneously improving surface curability while preventing surface deterioration.
Solution Approach 2:
The patent employs monofunctional (meth)acrylate compounds as key components that provide temporary protection during the curing process. These compounds resist curing inhibition by oxygen and prevent surface scratching, acting as protective agents that ensure proper curing without requiring polythiol compounds.
3Reliability
If monofunctional (meth)acrylate is used to improve surface properties, then surface curability is enhanced, but wear resistance decreases and gloss is lost
Solution Approach 1:
The patent changes the molecular structure parameters of the (meth)acrylate compounds by introducing cyclic or aromatic rings. This structural modification enables the composition to achieve both surface curability and wear resistance, eliminating the need to choose between monofunctional (meth)acrylate for surface properties and multifunctional compounds for wear resistance.
Solution Approach 2:
The patent creates a composite system combining (meth)acrylate compounds with cyclic or aromatic rings, urethane-modified (meth)acrylate oligomers, and photopolymerization initiators. This composite material simultaneously provides surface curability, wear resistance, and gloss retention, resolving the contradiction between surface properties and mechanical strength.
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 forms a cured product with excellent wear resistance and high gloss, resisting scratching and maintaining luster even after photocuring.
Implementation Method 1
a photocurable composition for a nail or an artificial nail, comprising the following components (A) to (E)... component (E): a photoinitiator
Data Source
AI summary
To provide a photocurable composition for a nail or an artificial nail, which can allow for formation of a cured product having excellent wear resistance and having high gloss properties. A photocurable composition for a nail or an artificial nail, comprising the following components (A) to (E), in which, in a case where the component (C) comprises a component (c-1), a monofunctional (meth)acrylate is not contained as the component (D) or a content of a monofunctional (meth)acrylate as the component (D) is 50% by mass or less based on a total of the component (D): component (A): a urethane-modified (meth)acrylate oligomer; component (B): a (meth)acrylate having a bisphenol backbone; component (C): one or more (meth)acrylates selected from the group consisting of a component (c-1) and a component (c-2) (except for the component (A) and the component (B)): component (c-1): a (meth)acrylate having an alicyclic hydrocarbon backbone; and component (c-2): a (meth)acrylate having an isocyanurate backbone; component (D): a (meth)acrylate except for components (A) to (C); and component (E): a photoinitiator.