Polyurethane Primer Reduces Staining in Acrylic Latex Nail Coatings
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Solution Overview
Problem
Traditional water-based nail enamels often result in staining of nails due to water-soluble dyes penetrating into the nail, despite attempts to modify colorants to be insoluble or encapsulate them, which have not effectively prevented staining.
Innovation Solution
A nail composition set comprising a color coat with acrylic latex and water, combined with a primer based on compounds other than acrylic latex, preferably polyurethane, to reduce and inhibit staining, with an optional topcoat for added protection and shine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water-soluble dyes are used as colorants in nail enamels, then the color coat can be applied easily and removed conveniently, but the dyes penetrate into the nail and cause staining
Solution Approach 1:
The patent introduces a primer layer as an intermediary between the nail and the color coat. This primer acts as a barrier that prevents water-soluble dyes from penetrating the nail while still allowing the color coat to be applied over it. The primer creates a protective interface that resolves the contradiction between ease of removal and prevention of staining.
Solution Approach 2:
The nail enamel system is divided into separate functional layers: a primer layer and a color coat layer. The primer layer specifically addresses the staining problem, while the color coat layer maintains the desired color and ease of application. This segmentation allows each layer to optimize its specific function without compromising the other.
2Object-affected harmful factors
If colorants are converted to lakes or surface treated to render them insoluble in water, then staining is reduced, but the colorant may still solubilize in the presence of water or other solubilizing solvents
Solution Approach 1:
The primer layer is applied in advance to the nail surface before applying the color coat. This preliminary action creates a protective barrier that prevents subsequent penetration by colorants, regardless of their solubility properties. The primer prepares the nail surface in advance to resist staining from any type of colorant.
Solution Approach 2:
The primer serves as an intermediary barrier between the nail and the colorant, preventing direct contact and potential solubilization. Even if colorants have reduced solubility through lake conversion or surface treatment, the primer provides an additional layer of protection that ensures reliability in preventing staining.
3Object-affected harmful factors
If a primer based on compounds other than acrylic latex is used under a color coat comprising acrylic latex and water, then nail staining is significantly reduced, but the composition requires multiple components
Solution Approach 1:
The nail enamel system is segmented into distinct functional components: a primer layer with specific stain-prevention properties and a color coat layer with acrylic latex and water for easy application. This segmentation justifies the multiple components by assigning specific functions to each, where the primer handles staining prevention and the color coat handles coloration and ease of use.
Solution Approach 2:
The primer layer serves multiple functions: it acts as an adhesive base for the color coat, creates a barrier against staining, and prepares the nail surface for optimal color application. This multi-functionality justifies the additional component by consolidating several necessary functions into a single layer.
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 use of a polyurethane-based primer significantly reduces nail staining when applied under a color coat containing acrylic latex and water, providing effective adhesion and long-lasting wear properties while minimizing staining upon removal.
Implementation Method 1
The primer reduces and/or inhibits staining of the nails by the color coat
Implementation Method 2
water-soluble dyes as colorants. Staining can result from the water-soluble dyes penetrating into the nail
Data Source
AI summary
The invention relates to nail composition sets comprising at least one primer comprising compound(s) other than acrylic latex and at least one color coat comprising at least one acrylic latex and water.