Water-Based Nail Polish Composition with Hard Nanoparticles
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Solution Overview
Problem
Traditional nail polishes based on nitrocellulose resins are flammable and toxic, and water-based alternatives face challenges in drying speed, film brilliance, and adhesion to the nail.
Innovation Solution
A water-based nail-polish composition combining a suspension of hard acrylic nanoparticles with a glass transition temperature above 55°C, pre-crosslinked acrylic monomers, and a solution of low molecular weight acrylic polymer, along with specific coalescent and plasticizing solvents, to form a cohesive and durable film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based suspensions of polymers are used to replace traditional nitrocellulose-based polishes, then toxicity and flammability are reduced, but drying speed and film hardening are significantly slowed
Solution Approach 1:
The patent changes the glass transition temperature parameter of the polymer suspension from conventional low Tg values to a specific range of 50-70°C, which fundamentally alters the drying kinetics and film formation mechanism, enabling rapid water evaporation while maintaining film quality
Solution Approach 2:
The invention uses a composite polymer system combining acrylic polymers with specific Tg characteristics and pre-crosslinked monomers, creating a multi-component water-based formulation that achieves both safety and performance requirements
2Object-affected harmful factors
If water-based polymer suspensions are used, then safety is improved, but film brilliance and adhesion to the nail are insufficient
Solution Approach 1:
The patent optimizes the glass transition temperature parameter to 50-70°C and controls particle size distribution, which fundamentally improves film coalescence, adhesion, and optical properties while maintaining water-based safety
Solution Approach 2:
The invention incorporates pre-crosslinked monomers that initiate crosslinking reactions during film formation, creating strong adhesive bonds with the nail surface before the film fully dries, ensuring superior adhesion from the outset
3Ease of manufacture
If conventional polymer suspensions with low glass transition temperature are used, then film formation is easier, but the film lacks hardness and flexibility
Solution Approach 1:
The patent raises the glass transition temperature to 50-70°C and incorporates pre-crosslinked monomers, creating a polymer matrix that forms easily during application but develops exceptional hardness and flexibility as it cures
Solution Approach 2:
The invention pre-crosslinks monomers in the suspension before application, so that crosslinking begins during film formation, simultaneously achieving easy film formation and final film 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 achieves rapid drying, excellent shine, and long-lasting adhesion to the nail, with a hardness/flexibility compromise that prevents chipping and water resistance, while being easily removable and safe from toxicity.
Implementation Method 1
The coalescent solvents evaporate during drying
Implementation Method 2
the plasticizing solvents remain primarily in the film
Implementation Method 3
the presence of di- or trifunctional monomers makes it possible to create a three-dimensional network quickly, by promoting polymerization
Data Source
AI summary
The water-based nail-polish composition includes a mixture of at least one water-based suspension (A) of hard nanoparticles of an acrylic polymer at a glass transition temperature that is greater than or equal to 55° C., in combination with at least one coalescent and/or plasticizing solvent of the polymer; and at least one water-based suspension (B) of nanoparticles of acrylic monomers, partially cross-linked, that have a film formation temperature of less than 15° C. The water-based composition can also contain a solution (C) of an acrylic polymer of low molecular weight that is less than approximately 20,000, with a high acid value, neutralized to a pH of between 7 and 8.5, approximately.