Multistage Polymeric Particle Dispersion for Resistant Aqueous Coatings
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Solution Overview
Problem
Aqueous coating compositions face challenges in providing coatings with sufficient resistance to hot water, alcohol, acetic acid, and alkali, particularly in applications like kitchen furniture and dining tables.
Innovation Solution
Aqueous dispersion of multistage polymeric particles comprising specific ratios of polymers A and B, with structural units of acetoacetamide functional monomers, monoethylenically unsaturated acid monomers, and multiethylenically unsaturated monomers, prepared through multistage free-radical polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If aqueous coating compositions are used to reduce VOCs, then environmental performance is improved, but resistance to hot water and chemicals deteriorates
Solution Approach 1:
The patent employs composite polymeric particles containing both hydrophilic polymer A (providing water resistance) and hydrophobic polymer B (providing chemical resistance). This composite structure enables the coating to simultaneously achieve hot water resistance and chemical resistance while maintaining the low-VOC advantage of aqueous formulations.
2Object-affected harmful factors
If aqueous coating compositions are used to reduce VOCs, then environmental performance is improved, but chemical resistance to alcohol, acetic acid, and alkali deteriorates
Solution Approach 1:
The composite polymeric particles combine hydrophilic polymer A and hydrophobic polymer B, where polymer B specifically provides the chemical resistance needed for alcohol, acetic acid, and alkali resistance while the aqueous formulation maintains low VOC emissions.
3Ease of manufacture
If simple polymer compositions are used to simplify formulation, then manufacturing complexity is reduced, but coating performance in terms of hot water and chemical resistance deteriorates
Solution Approach 1:
The patent segments the polymer composition into two distinct polymer components (A and B) with different functional properties. This segmentation allows each polymer to specialize in providing specific resistance properties, achieving high performance while maintaining relatively simple manufacturing through copolymerization or blend formulation.
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 resulting coatings exhibit excellent hot water resistance rated at 3 or higher, along with good chemical resistance to alcohol and alkali, achieving ratings of 4 or higher and acetic acid resistance of 3 or higher.
Implementation Method 1
a process for preparing the aqueous dispersion of multistage polymeric particles of the first aspect, by multistage free-radical polymerization
Data Source
AI summary
An aqueous dispersion of multistage polymeric particles comprises at least two polymers, and a coating composition comprising such aqueous dispersion of multistage polymeric particles can provide coatings with hot resistance, alcohol resistance, alkali resistance and acetic acid resistance.