Aqueous Coating with Spherical Silica Particles
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Solution Overview
Problem
Existing compositions for coating substrates face challenges in providing long-lasting protection from soil and stain accumulation while being environmentally friendly, shelf-stable, and easy to apply, often requiring volatile organic solvents and complex application processes.
Innovation Solution
A composition comprising an aqueous continuous liquid phase with spherical silica particles of 60 nanometers or less and a water-soluble copolymer of acrylic acid and acrylamide, with a specific weight ratio and pH adjustment, applied to substrates like glass, metal, or ceramic to create a durable and cleanable coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If volatile organic solvents are used in coating compositions, then the coating performance and ease of application are improved, but environmental friendliness deteriorates
Solution Approach 1:
The patent changes the fundamental parameter of the liquid phase from volatile organic solvents to water-based aqueous continuous phase. This substitution maintains the coating composition's applicability and performance while eliminating the environmental harm associated with volatile organic solvents, directly resolving the contradiction between ease of application and environmental friendliness.
Solution Approach 2:
The patent employs readily available aqueous dispersions of spherical silica particles and commercially available water-soluble copolymers, replacing expensive and environmentally problematic volatile organic solvent systems. This approach uses simpler, more environmentally benign materials that achieve the same coating function without the harmful effects.
2Reliability
If complex application processes are used, then coating performance is improved, but ease of use by unskilled users deteriorates
Solution Approach 1:
The patent creates a coating composition that is self-stabilizing through the specific interaction between spherical silica particles and water-soluble copolymers. The composition maintains its stability and performance characteristics without requiring complex stabilization processes or skilled application techniques, allowing unskilled users to achieve reliable coating results.
Solution Approach 2:
The patent uses a composite system combining spherical silica particles with water-soluble copolymers in an aqueous phase. This composite material provides inherent stability and performance while simplifying the application process, as the synergistic interaction between components eliminates the need for complex application procedures.
3Reliability
If conventional coating compositions are used, then coating performance is achieved, but shelf-life deteriorates
Solution Approach 1:
The patent changes the chemical environment from organic solvent-based to water-based aqueous continuous phase, fundamentally altering the stability parameters of the coating composition. This parameter change enables long-term shelf stability by preventing the degradation and separation issues common in conventional organic-based compositions, while maintaining coating performance.
Solution Approach 2:
The water-soluble copolymer acts as an intermediary stabilizing agent that prevents aggregation of spherical silica particles in the aqueous phase. This intermediary substance ensures long-term shelf stability by maintaining particle dispersion without compromising the coating's performance characteristics when applied.
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 provides long-lasting protection against mineral and soap deposit stains, is easy to apply, and exhibits extended shelf stability with minimal volatile organic solvents, ensuring durability and cleanability on various substrates.
Implementation Method 1
spherical silica particles dispersed in the aqueous continuous liquid phase
Implementation Method 2
a water-soluble copolymer of acrylic acid and an acrylamide
Data Source
AI summary
Compositions include a polymer and silica nanoparticles dispersed in an aqueous continuous liquid phase. The polymer is a water-soluble copolymer of acrylic acid and an acrylamide, or a salt of the same. Methods of making and using the compositions to coat a substrate are also disclosed.