Sliding Coating Composition for Stronger Polymer Layer Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing plain bearing elements with anti-friction coatings face issues with delamination of the polymeric sliding layer from the substrate, leading to reduced mechanical load-bearing capacity and potential detachment.
Innovation Solution
The use of an anti-friction varnish comprising an organic binder, solid lubricant, and an adhesion promoter with ligands that connect to both the substrate and the organic binder, enhancing the adhesion strength of the polymeric sliding layer and introducing corrosion protection, thereby improving the bonding process and mechanical load resistance without additional process steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a polymeric sliding layer is applied to a substrate without an adhesion promoter, then the coating process is simple, but the adhesion strength is insufficient leading to delamination
Solution Approach 1:
An adhesion promoter containing ligands is introduced as an intermediary substance between the substrate and the polymeric sliding layer. The ligands form chemical connections to both the substrate and the polymer matrix, creating a bridging effect that significantly enhances adhesion strength and prevents delamination under mechanical load.
Solution Approach 2:
The coating is formulated as a composite material system comprising the polymeric binder, solid lubricants, and adhesion promoter with ligands. This composite structure combines the friction-reducing properties of the polymer-lubricant matrix with the bonding capabilities of the ligand-adhesion promoter system, achieving both low friction and high adhesion simultaneously.
2Strength
If the adhesion promoter is bonded to the substrate or organic binder during curing, then additional process steps are required, but adhesion strength is improved
Solution Approach 1:
The bonding of the adhesion promoter to the substrate or organic binder is merged with the curing process of the organic binder. The ligands form their connections during the same thermal or chemical curing cycle that polymerizes the binder, eliminating the need for separate adhesion-promoter bonding steps and maintaining production efficiency.
Solution Approach 2:
The adhesion promoter is pre-incorporated into the coating composition before application. The ligands are positioned in advance within the coating matrix, ready to form bonds with the substrate or binder during the subsequent curing process, rather than requiring post-application treatment steps.
3Reliability
If a corrosion inhibitor is added to the coating, then corrosion protection is improved, but the coating composition becomes more complex
Solution Approach 1:
The adhesion promoter with ligands is designed to perform multiple functions simultaneously: it provides adhesion enhancement through substrate/binder bonding while also incorporating corrosion inhibition capabilities. This multi-functional approach eliminates the need for separate corrosion inhibitor additives, maintaining composition simplicity while achieving both adhesion and corrosion protection.
Solution Approach 2:
The corrosion protection function is merged with the adhesion promotion function in a single integrated component. The ligand-containing adhesion promoter structure incorporates corrosion-inhibiting chemical groups or molecules, combining two protective functions into one substance that simplifies the overall coating formulation.
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 significantly enhances the adhesion strength of the polymeric sliding layer to the substrate, allowing for higher mechanical load-bearing capacity without risk of detachment, while also providing corrosion protection and maintaining the desired friction reduction and cohesion properties of the anti-friction varnish.
Implementation Method 1
the at least one adhesion promoter has at least one ligand which connects the adhesion promoter to the organic binder or the substrate
Implementation Method 2
Hardening of the organic binder
Implementation Method 3
at least one solid lubricant
Data Source
Figure 1
AI summary
The invention relates to a sliding coating comprising at least one organic binder, at least one solid lubricant and at least one adhesion promoter for improving the adhesion of a polymeric sliding layer (3) produced from the sliding coating to a substrate, wherein the at least one adhesion promoter has at least one ligand that connects the adhesion promoter to the organic binder or the substrate.