Water-Based Aerosol Coating for Metal Oxidation Inhibition
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Solution Overview
Problem
Existing aerosol compositions face challenges in providing a smooth, protective, and oxidation-inhibiting coating due to limitations with water-based solvents, particularly in achieving desirable flow, adhesion, and cross-linking for surfaces like steel and aluminum.
Innovation Solution
A water-based aerosol composition incorporating a waterborne alkyd polymer material, liquid propellant, and additional components such as polymeric silicone-free defoamer and Newtonian polyurethane rheology agent, which upon application and curing, forms a stable, non-porous film with high gloss and adhesion properties to prevent oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based solvents are used in aerosol compositions, then environmental safety and low odor are improved, but coating smoothness and adhesion deteriorate
Solution Approach 1:
The patent uses a composite polymer system combining acrylic and alkyd polymers in specific ratios (acrylic polymer 5-20 parts, alkyd polymer 5-20 parts) to achieve both water-based environmental safety and proper coating performance. The composite resin system provides adequate flow, adhesion, and cross-linking that single-component water-based systems cannot achieve alone.
Solution Approach 2:
The patent modifies the chemical composition parameters of the polymer material by incorporating specific functional groups and adjusting molecular weight distributions. The resin composition includes carboxyl-containing polymers (0.1-5 parts) and hydroxyl-containing polymers (0.1-5 parts) to enhance adhesion and cross-linking chemistry, enabling water-based systems to achieve proper bonding to metal surfaces.
2Reliability
If waterborne alkyd polymer material is used, then oxidation inhibition is improved, but formulation complexity increases
Solution Approach 1:
The waterborne alkyd polymer material serves multiple functions simultaneously: it provides oxidation inhibition through its chemical composition, acts as a binder for adhesion, contributes to film formation, and enables proper flow characteristics. This multi-functional polymer reduces the need for separate additives and simplifies the overall formulation despite the complex performance requirements.
Solution Approach 2:
The patent specifies precise compositional parameters for the waterborne alkyd polymer including hydroxyl value (10-50 mg KOH/g), carboxyl value (5-20 mg KOH/g), and molecular weight (5,000-50,000 g/mol) to optimize the balance between oxidation inhibition and formulation simplicity. These controlled parameters ensure predictable performance without requiring complex formulation adjustments.
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 solution provides a stable, rust-preventive, high-gloss coating with low odor and low Maximum Incremental Reactivity, ensuring effective adhesion and oxidation inhibition on metal surfaces while maintaining a balance of adhesion and cross-linking rates, and is stable for extended periods.
Implementation Method 1
a water-based aerosol composition includes a solvent including water, liquid propellant and a waterborne alkyd polymer material
Implementation Method 2
utilizing a liquid propellant for spraying a water-based aerosol composition onto a surface
Implementation Method 3
upon delivery of the waterborne alkyd polymer material to a surface via the propellant and subsequent curing of the waterborne alkyd polymer material on the surface, inhibit oxidation of the surface
Implementation Method 4
the waterborne alkyd polymer material may operate with the solvent and propellant to inhibit oxidation upon application to a surface
Implementation Method 5
Solvents are useful for enhancing flow as well as to facilitate proper dispersion of components in the coating material
Data Source
AI summary
Aspects of the disclosure are directed to a water-based aerosol composition, as well as related methods and resulting films. As may be implemented in accordance with one or more embodiments, a water-based aerosol composition includes a solvent including water, a liquid propellant, and a waterborne alkyd polymer material. The solvent, propellant and waterborne alkyd polymer operate together to propel the water-based aerosol composition onto a surface and cure the alkyd polymer on the surface, therein providing a coating on the surface that inhibits oxidation thereof.