Coating Composition for Metal Conductors with Reactive Particles
Solution Overview
Problem
Existing coating compositions for electrically conductive wires lack sufficient thermal and mechanical resistance, particularly for high-voltage and frequency converter-controlled motors, which require stringent thermal endurance and mechanical properties to withstand high voltage loads and temperatures, and partial discharge resistance.
Innovation Solution
A coating composition comprising reactive particles with an element-oxygen network and specific reactive functions chemically bound to the surface, combined with conventional binders and additives, providing enhanced thermal, mechanical, and partial discharge resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional binders and non-reactive particulate materials are used, then the coating composition is easy to manufacture, but the thermal and mechanical resistance is insufficient
Solution Approach 1:
The patent uses composite particles consisting of an inorganic core (metal oxide or silica) combined with an organic shell containing reactive functional groups. This composite structure provides both the thermal stability of inorganic materials and the mechanical flexibility and reactivity of organic compounds, resolving the contradiction between thermal resistance and manufacturing ease.
Solution Approach 2:
The patent changes the chemical reactivity parameter of the particulate material by introducing reactive functional groups (isocyanate, epoxide, carboxylic acid, hydroxyl, amine) on the particle surface. This allows the particles to chemically bond with binders and substrates, dramatically improving mechanical resistance and preventing coating destruction during wire extension.
2Reliability
If organically modified silica heteropolycondensate is used, then partial discharge resistance is improved, but the coating loses flexibility
Solution Approach 1:
The patent applies local quality by creating a core-shell structure where the inorganic core provides partial discharge resistance while the organic shell provides flexibility. Different regions of the particle have different properties: the core maintains reliability for partial discharge resistance, while the shell ensures ease of operation through flexibility and chemical reactivity.
3Strength
If reactive particles with element-oxygen network are used, then thermal and mechanical resistance is significantly improved, but the device complexity increases
Solution Approach 1:
The patent segments the particle structure into distinct functional regions: an inorganic core for thermal stability and an organic shell for mechanical flexibility and reactivity. This segmentation allows each component to optimize its function while working together, achieving high performance without excessive overall complexity.
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 coating composition achieves outstanding thermal and mechanical resistance, improved storage stability, and flexibility, ensuring long device lifetimes and excellent partial discharge resistance for coated metal conductors.
Implementation Method 1
the reactive particles having an average diameter in a range of 1 to 300 nm, the particles based on an element-oxygen network with one or multiple elements of the series comprising silicon, zinc, aluminium, tin, boron, germanium, gallium, lead, the transition metals, the lanthanides and/or actinides
Implementation Method 2
with reactive functions R1 and optionally non-reactive and/or partially reactive functions R2 and R3 chemically bound on the surface of the element-oxygen network to the element and/or the oxygen atoms of the network
Implementation Method 3
providing improved partial discharge resistance of the coatings, the particles have an average diameter in a range 100 nm or less and are dispersed in the coating composition
Data Source
AI summary
The invention relates to a coating composition for coating electrically conductive wires. The coating composition comprising 0.1 to 60 wt% of reactive particles, based on an element-oxygen network and further having reactive functional groups chemically bound to the surface of the element-oxygen network. At least one of the reactive functional groups is an isocyanate group that is bound to the reactive particle via a carbamate group. The coating composition can further contain one or more conventional binders and other additives.