Silvery-White Fastener Coating for Stable Friction After Heat Treatment
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Solution Overview
Problem
Existing fastening members face issues with unstable friction coefficients due to poor dispersibility of wax-based protective films, susceptibility to heat degradation, and increased friction coefficients during high-temperature treatments, which affect their stability and functionality.
Innovation Solution
A top coating agent comprising polyoxyalkylene amine-based surfactant, water-soluble modified organopolysiloxane, aluminum flakes, and a diluent, which forms a silvery-white protective film that stabilizes friction coefficients and enhances corrosion and water resistance, even under high-temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a water-soluble modified organopolysiloxane top coating agent is used to achieve heat resistance, then the film becomes strong and stable at high temperatures, but the appearance becomes black and the friction coefficient increases
Solution Approach 1:
The patent combines water-soluble modified organopolysiloxane with aluminum flakes and polyoxyalkylene amine-based surfactant to create a composite top coating agent. The organopolysiloxane provides heat resistance through Si-O-Si bonds, while aluminum flakes provide silvery-white appearance and the surfactant controls friction coefficient, achieving multiple properties simultaneously through material composition
2Strength
If heat treatment is conducted at high temperature to form a stable protective film, then the film strength increases, but the friction coefficient further increases
Solution Approach 1:
The patent changes the chemical composition parameters of the top coating agent by incorporating polyoxyalkylene amine-based surfactant with specific molecular structure (containing hydrophobic alkyl groups and hydrophilic polyoxyalkylene groups). This compositional parameter change allows the film to maintain low friction coefficient even after high-temperature heat treatment that increases film strength
3Stability of the object's composition
If wax is used to stabilize friction coefficients, then friction stability improves, but dispersibility becomes poor and sufficient stability cannot be obtained
Solution Approach 1:
The patent changes from using wax to using polyoxyalkylene amine-based surfactant, altering the chemical parameters of the friction modifier. The surfactant's molecular structure with hydrophobic and hydrophilic groups enables excellent water-based dispersion while providing stable friction coefficients, resolving both dispersibility and stability issues
4Ease of manufacture
If organic substance films are used for protective coating, then the coating process is simple, but the films are susceptible to heat and deteriorate at high temperatures
Solution Approach 1:
The patent changes the chemical composition parameters by using water-soluble modified organopolysiloxane instead of conventional organic substances. The Si-O-Si bond structure provides high heat resistance while the water solubility maintains simple coating process application, achieving both heat resistance and ease of manufacture
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 agent provides a stable, silvery-white appearance with reduced friction coefficient increase during high-temperature treatments, ensuring excellent slidability, corrosion resistance, and water resistance for fastening members.
Implementation Method 1
Since the film formed by using this top coating agent is mainly composed of a Si—O—Si bond (siloxane bond), the film is resistant to heat, and is thus strong and stable with low deterioration even in an environment where the film is exposed to a high temperature
Implementation Method 2
a top coating agent comprising: a polyoxyalkylene amine-based surfactant, a water-soluble modified organopolysiloxane, aluminum flakes, and a diluent containing water
Implementation Method 3
a polyoxyalkylene amine-based surfactant... stabilizes slidability
Data Source
AI summary
The present invention addresses the problem of providing: a top coating agent which forms a protective film demonstrating a beautiful silvery-white appearance, can be adjusted to suppress increases in the friction coefficient even when heat-treated at a high temperature, stabilizes sliding, is strong, and has excellent water resistance, corrosion resistance, and the like; and a fastening member having the protective film formed using said top coating agent. The present invention provides: a top coating agent that includes a polyoxyalkylene amine-based surfactant, a water-soluble modified organopolysiloxane, aluminum flake, and a diluent containing water; and a silvery-white fastening member having a protective film formed using said top coating agent.