Amorphous Polymer Coating for Flexible Corrosion Protection
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Solution Overview
Problem
Conventional protective coatings for substrates exposed to mechanical forces and temperature fluctuations, such as ship components, are not sufficiently flexible and can crack or detach, leading to corrosion, and often require harmful substances for application.
Innovation Solution
A composition comprising 5-30 wt.% amorphous polymer with a glass transition temperature below -20°C, 15-60 wt.% filler, and 10-80 wt.% terpene solvent, which is easy to apply and resistant to substrate variations, minimizing harmful substance release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid layer of paint is applied to the substrate, then the protective layer provides corrosion resistance, but the layer cracks or detaches when the substrate expands or shrinks due to temperature fluctuations
Solution Approach 1:
The patent changes the physical-chemical parameters of the coating by using polymers with specific glass transition temperatures below -50°C, ensuring the coating remains flexible at service temperatures and can accommodate substrate expansion and contraction without cracking or detaching
Solution Approach 2:
The patent employs composite material systems combining flexible polymers (polyisobutene, polybutene, butyl rubber) with functional additives to create a multi-component coating that simultaneously provides flexibility, adhesion, and corrosion protection
2Reliability
If conventional primer compositions are used, then the substrate is protected from corrosion, but harmful substances are released during application requiring personal protection equipment
Solution Approach 1:
The patent changes the chemical composition parameters by replacing harmful solvents with safer alternatives and using polymers that do not require toxic hardeners, thereby reducing harmful emissions during application while maintaining protective functionality
Solution Approach 2:
The patent converts the previously harmful requirement for crosslinking hardeners into a benefit by achieving network formation through alternative mechanisms that do not release harmful substances, such as physical entanglement or safer chemical reactions
3Reliability
If the substrate surface is extensively pre-treated before coating, then the adhesion of the protective layer is improved, but the complexity and time required for the coating process increases
Solution Approach 1:
The patent enables the coating to self-adhere to the substrate through the inherent properties of the polymer composition, eliminating the need for complex pre-treatment processes such as phosphating or chromating, while still achieving reliable adhesion
Solution Approach 2:
The patent changes the surface energy and wetting parameters of the coating through careful selection of polymer and additive composition, enabling the coating to spontaneously wet and adhere to the substrate surface without extensive mechanical or chemical pre-treatment
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 forms a flexible, self-healing protective layer that resists water, oxygen, and chemicals, reducing corrosion and adhesion issues, while minimizing pre-treatment requirements and environmental impact.
Implementation Method 1
an amorphous polymer having a glass transition temperature of lower than -20°C
Implementation Method 2
10 wt.% to 80 wt.% of a solvent, wherein the solvent is a terpene having a boiling point of 130°C to 270°C
Data Source
AI summary
The present invention relates to a composition comprising: (a) about 10 wt.% to about 90 wt.% of an amorphous polymer, said amorphous polymer having a glass transition temperature of lower than about -20°C, and (b) about 10 wt.% to about 90 wt.% of a solvent, wherein the amounts of (a) and (b) are calculated on the total weight of the composition, and wherein the solvent is a terpene having a boiling point of about 130°C to about 270°C. The present invention also relates to a process for the application of a protective layer to a substrate, the process comprising application of a layer of the composition to the surface of the substrate or a part thereof. The present invention further relates to a container comprising the composition and a propellant.