Itaconic Acid Functionalized Binder Hiding Efficiency
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Solution Overview
Problem
Current pigmented paint formulations using itaconic acid functionalized latex binders suffer from reduced hiding efficiency and grit issues due to uncontrolled reactions with TiO2 particles, requiring complex mixing processes and additional steps that increase costs and affect performance.
Innovation Solution
A process involving a combination of an aqueous solution of a sulfonic acid functionalized polymer and a stable aqueous dispersion of itaconic acid functionalized polymer particles with TiO2, where the weight percentages of each component are optimized to improve hiding efficiency without introducing additional steps or increasing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If highly reactive functional monomers such as phosphoethylmethacrylate (PEM) are used to prepare adsorbing latex, then hiding efficiency is improved, but grit formation occurs due to uncontrolled reaction with TiO2
Solution Approach 1:
The patent changes the chemical reactivity parameter of the functional monomer from highly reactive (PEM) to less reactive (itaconic acid), thereby reducing the harmful reaction with TiO2 while maintaining adequate adsorption capability for improving hiding efficiency
Solution Approach 2:
The patent uses a simpler, less reactive monomer system that does not require complex high-shear mixing equipment, effectively replacing expensive manufacturing infrastructure with a more tolerant chemical system
2Object-affected harmful factors
If less reactive functional monomers such as itaconic acid (IA) are used to prepare adsorbing latex, then grit formation is reduced and cost is decreased, but hiding efficiency is significantly reduced
Solution Approach 1:
The patent creates a composite latex system combining itaconic acid functional groups with additional copolymer components that enhance adsorption capability, achieving both low grit formation and improved hiding efficiency through synergistic material composition
Solution Approach 2:
The patent optimizes the local concentration and distribution of itaconic acid functional groups within the polymer structure to maximize TiO2 adsorption effectiveness while maintaining overall formulation stability and hiding performance
3Manufacturing precision
If pH manipulation is applied to adsorbing latex prepared with less reactive monomer (IA), then reduced grit and better hiding are achieved, but additional steps are introduced that may lead to drop in volume solids and increase in dissolved salts
Solution Approach 1:
The patent incorporates pH-responsive functional groups directly into the latex synthesis process, so the adsorption optimization is built into the material structure itself rather than requiring separate post-synthesis pH adjustment steps
Solution Approach 2:
The patent designs the itaconic acid functionalized latex to automatically optimize its adsorption behavior through its inherent pH-responsive properties, allowing the system to self-regulate without external intervention or additional processing steps
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 optimized composition enhances hiding efficiency in paint formulations using itaconic acid functionalized binders, providing improved film properties and scrub resistance while minimizing grit formation and cost impacts.
Implementation Method 1
emulsion polymers particles adsorbed to the TiO2 particle surface
Data Source
AI summary
The present invention is a composition comprising a) a stable aqueous dispersion of polymer particles functionalized with structural units of itaconic acid or a salt thereof and; b) a water-soluble polymer functionalized with structural units of a sulfonic acid monomer or a salt thereof as well as a method comprising mixing the stable aqueous dispersion of the itaconic acid functionalized polymer particles with the sulfonic acid functionalized polymer, and TiO2. The composition of the present invention is useful a coatings formulation that provides surprisingly good hiding.