Acrylic Paint Composition with Zn++ Additive for Water Stain Resistance
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Solution Overview
Problem
Highly colored paints, especially deep base and semigloss varieties, face challenges with water staining due to the leaching of water-soluble materials from the paint film, which is exacerbated by incomplete film formation shortly after application.
Innovation Solution
A paint composition featuring a stable aqueous dispersion of two-phase acrylic polymer particles with a soft phase below 0°C and a hard phase above 30°C, functionalized with keto monomers, combined with Zn++ compounds and dihydrazides or polyamines, and a limited pigment volume concentration, enhancing water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If highly colored paint is applied to substrate, then color intensity is improved, but water stain resistance deteriorates due to leaching of water-soluble materials
Solution Approach 1:
The patent modifies the chemical composition parameters of the paint formulation by incorporating specific polymers with carboxylic acid groups and zinc ions, creating a coordination complex that reduces water solubility of colorants while maintaining color intensity
Solution Approach 2:
The patent creates a composite system combining polymers, zinc ions, and colorants where the polymer-Zn complex acts as a protective matrix that prevents water penetration and leaching, thereby improving water stain resistance while preserving color strength
2Loss of time
If paint is applied shortly before testing, then film formation is incomplete, but water penetration increases导致leaching
Solution Approach 1:
The patent incorporates zinc ions and polymers with carboxylic acid groups into the paint formulation beforehand, creating a pre-formed coordination complex that provides immediate water resistance upon application, eliminating the need for extended drying time to achieve water stain resistance
Solution Approach 2:
The polymer-Zn coordination complex acts as an intermediary substance between the colorant and water, blocking water penetration pathways and preventing direct contact between water and water-soluble materials, thereby providing rapid water stain resistance
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 significantly improves water-stain resistance in deep base and accent paints by stabilizing the paint film and reducing water penetration, outperforming formulations without Zn++ additives.
Implementation Method 1
acrylic based polymer particles functionalized with from 0.2 to 12 weight percent, based on the weight of the polymer particles, of structural units of a monomer with keto functionality
Implementation Method 2
structural units of a monomer with keto functionality
Implementation Method 3
from 0.5 to 5 weight percent of a Zn ++
Data Source
AI summary
The present invention relates to a deep base or accent coating composition comprising an acrylic based binder and a Zn++ additive. The composition of the present invention resists water staining better than comparable formulations that do not contain the additive.