Photocurable Nail Composition Thixotropy Transparency
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Solution Overview
Problem
Photocurable compositions for nails or artificial nails containing polythiol compounds and fumed silica face challenges in achieving both high structural viscosity ratio (thixotropy) and high transparency, as the addition of fumed silica can lead to inconsistent thixotropy and reduced transparency.
Innovation Solution
A photocurable composition comprising a compound with a (meth)acryloyl group, a polythiol compound, a photoinitiator, and a filling agent containing surface-treated fumed silica with specific surface residues, optimized in mass ratio and content to achieve high thixotropy and transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If fumed silica is added to enhance thixotropy, then the structural viscosity ratio improves, but the transparency of the cured material deteriorates
Solution Approach 1:
The patent changes the surface treatment parameters of fumed silica by introducing specific silane compounds (formula 1 and formula 2) with controlled alkyl chain lengths and structures. This parameter modification allows the filling agent to maintain thixotropy-enhancing properties while reducing light scattering, thereby resolving the contradiction between structural viscosity ratio and transparency
Solution Approach 2:
The patent creates a composite filling agent system by combining surface-treated fumed silica (with specific silane modifications) with the polythiol compound and (meth)acryloyl compound. This composite approach allows the silane-treated silica surface to interact specifically with the polythiol groups, enhancing thixotropy through molecular interaction while the controlled surface treatment maintains optical clarity
2Stability of the object's composition
If the amount of fumed silica is increased to enhance thixotropy, then the structural viscosity ratio improves, but the transparency further deteriorates
Solution Approach 1:
The patent modifies the surface treatment parameters of fumed silica by introducing specific silane compounds (formula 1 and formula 2) with controlled alkyl chain lengths and structures. This parameter modification allows the filling agent to maintain thixotropy-enhancing properties while reducing light scattering, thereby resolving the contradiction between structural viscosity ratio and transparency
Solution Approach 2:
The patent creates a composite filling agent system by combining surface-treated fumed silica (with specific silane modifications) with the polythiol compound and (meth)acryloyl compound. This composite approach allows the silane-treated silica surface to interact specifically with the polythiol groups, enhancing thixotropy through molecular interaction while the controlled surface treatment maintains optical clarity
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 effectively balances high structural viscosity ratio and low turbidity, making it suitable for art gel nail applications, particularly for forming cubic decorations with improved surface curability and handling properties.
Implementation Method 1
a photocurable composition for a nail or an artificial nail, containing a polythiol compound... Component (A): a compound having a (meth) acryloyl group... Component (C) a photoinitiator
Data Source
AI summary
A photocurable composition for a nail or an artificial nail, contains a polythiol compound and fumed silica, in which the composition allows both a high structural viscosity ratio (high thixotropy), and a high transparency (low turbidity) of a cured material to be achieved. A photocurable composition for a nail or an artificial nail, contains Component (A): a compound having a (meth)acryloyl group; Component (B): a polythiol compound; Component (C): a photoinitiator; and Component (D): a filling agent containing a component (D-1) and a component (D-2). The component (D-1) and the component (D-2) are each surface-treated fumed silica having a specific residue on the surface thereof.