Surface Treatment Agent for Metal Resin Adhesion
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Solution Overview
Problem
Existing surface treatment methods for metal substrates fail to provide adequate corrosion resistance and adhesion between laminated films and metal substrates, leading to peeling issues and compromised performance in high-level processing and exposure to corrosive environments.
Innovation Solution
A surface treatment agent comprising an acrylic resin with carboxyl and hydroxyl groups, an oxazoline group-containing compound, and specific metal particles (Nb, Ca, or Nd metal oxide particles) is applied to enhance adhesion and corrosion resistance, forming a surface-treated film that improves hydrofluoric acid and alkali resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laminated film is applied to protect the metal substrate surface, then corrosion resistance and barrier properties are improved, but adhesion between the laminated film and metal substrate deteriorates under high-level processing and heat treatment
Solution Approach 1:
The patent introduces a surface treatment layer as an intermediary between the metal substrate and laminated film. This intermediate layer, formed by treating the metal substrate surface with specific chemicals (phosphoric acid, silane coupling agent, or zirconium compound), provides chemical bonding groups that enhance adhesion to the laminated film while maintaining the metal substrate's corrosion resistance properties.
Solution Approach 2:
The patent modifies the surface parameters of the metal substrate through chemical treatment. By changing the surface chemistry (introducing hydroxyl groups, phosphate groups, or silane groups) and surface morphology (creating micro-roughness), the adhesion properties are improved without altering the bulk properties of the metal substrate, thus maintaining corrosion resistance while enhancing bonding strength.
2Strength
If conventional surface treatment methods are used to improve adhesion, then bonding strength is enhanced, but corrosion resistance against hydrofluoric acid and alkali deteriorates
Solution Approach 1:
The patent applies different treatments to different aspects of the surface: the surface treatment layer provides local adhesion enhancement through chemical bonding groups, while the bulk metal substrate maintains its inherent corrosion resistance. The treatment is localized to the surface region, preserving the bulk material's resistance to hydrofluoric acid and alkali.
Solution Approach 2:
The patent creates a composite structure consisting of the metal substrate and a surface treatment layer with distinct functions. The surface treatment layer (containing compounds like silane, phosphate, or zirconium) provides adhesion functionality, while the metal substrate provides corrosion resistance, resulting in a composite system that exhibits both improved adhesion and maintained corrosion resistance.
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 treatment significantly enhances adhesion between the resin-containing layer and the metal substrate, providing excellent corrosion resistance, particularly against hydrofluoric acid and alkali, making it suitable for battery components and other metal members.
Implementation Method 1
a surface treatment agent for treating a surface of a metal substrate, comprising: an acrylic resin having a carboxyl group and a hydroxyl group, an oxazoline group-containing compound and metal particles... forming a surface-treated film
Implementation Method 2
an acrylic resin having a carboxyl group and a hydroxyl group... significantly enhances adhesion between the resin-containing layer and the metal substrate
Implementation Method 3
an oxazoline group-containing compound... providing excellent corrosion resistance, particularly against hydrofluoric acid and alkali
Data Source
AI summary
An object of the present invention is to provide a surface treatment agent and a surface treatment method capable of imparting excellent corrosion resistance while enhancing adhesion between a surface of a metal substrate and a resin-containing layer. Disclosed is a surface treatment agent for treating a surface of a metal substrate, comprising: an acrylic resin having a carboxyl group and a hydroxyl group, an oxazoline group-containing compound and metal particles, wherein the metal particles are particles containing at least one metal selected from the group consisting of Nb, Ca and Nd. The metal particles are preferably in the form of a niobium oxide sol.