UV Curable Resin Self-Lubricating Liner Adhesion
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Solution Overview
Problem
Existing self-lubricating sliding bearings require increased thickness and PTFE content in their liners to enhance lubricity and wear resistance, while maintaining adhesion to metal surfaces, which existing technologies struggle to achieve effectively.
Innovation Solution
An ultraviolet curable resin composition comprising a (meth)acrylate compound with an isocyanuric acid ring, polythiol compounds, and polytetrafluoroethylene (PTFE) as a solid lubricant, along with additives like phosphoric acid ester and silane groups, to form a self-lubricating liner with improved adhesion and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the self-lubricating liner is increased to improve lubricity and wear resistance, then the lubrication performance is improved, but the adhesion to metal surfaces deteriorates
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin by incorporating phosphoric acid ester groups and silane groups, which change the surface chemistry and adhesion properties. This allows the resin to maintain strong adhesion even when formulated with high PTFE content and applied at greater thicknesses, resolving the contradiction between liner thickness and adhesion strength
Solution Approach 2:
The patent creates a composite resin system combining multiple functional components: phosphoric acid ester modified (meth)acrylate for adhesion, silane modified (meth)acrylate for crosslinking and thermal stability, PTFE for lubrication, and polythiol for curing acceleration. This composite approach enables the liner to simultaneously achieve thick application, strong adhesion, and excellent lubrication properties
2Reliability
If the amount of PTFE added to the self-lubricating liner is increased to reduce friction and improve wear resistance, then the lubricity is improved, but the adhesion to metal surfaces deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the resin matrix by incorporating phosphoric acid ester groups that provide strong chemical bonding to metal surfaces. This chemical modification allows the resin to maintain adhesion strength even when PTFE content is increased to 30-80% by weight, as the phosphoric acid ester groups create a stable bonding interface independent of PTFE content
Solution Approach 2:
The phosphoric acid ester modified (meth)acrylate acts as an intermediary between the metal substrate and the PTFE particles. It provides chemical bonding to the metal surface while accommodating high concentrations of PTFE fillers, thereby mediating the interface and maintaining adhesion despite high PTFE content
3Reliability
If the thickness of the self-lubricating liner is increased to improve lubricity, then the lubrication performance is improved, but the curing completeness deteriorates
Solution Approach 1:
The patent changes the photopolymerization parameters by incorporating polythiol compounds that accelerate the curing reaction. This kinetic enhancement allows complete curing even in thick liner sections where UV light penetration would normally be insufficient, enabling thick applications to achieve full crosslinking and compositional stability
Solution Approach 2:
The patent ensures continuous and complete photopolymerization throughout the liner thickness by using polythiol acceleration. This maintains the useful curing action throughout the entire material volume, preventing uncured regions even in thick applications, thereby ensuring complete crosslinking and property development throughout the liner
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 enables the formation of a self-lubricating liner with increased thickness, improved lubricity, and enhanced adhesion to metal surfaces, allowing for higher PTFE content and reduced wear, while maintaining heat resistance and chemical stability.
Implementation Method 1
a photoradical initiator; UV curable resin composition comprising: a (meth)acrylate compound
Implementation Method 2
polythiol compound; accelerates curing reaction of the curable resin composition
Implementation Method 3
at least one of (meth)acrylate having a phosphoric acid ester group and (meth)acrylate having a silane group
Implementation Method 4
polytetrafluoroethylene resin as a solid lubricant; improved lubricity; reduced friction
Data Source
Figure 1A~2
Figure 3A~4
AI summary
There is provided an ultraviolet curable resin composition for a self-lubricating liner, including: a (meth)acrylate compound having an isocyanuric acid ring; at least one of (meth)acrylate having a phosphoric acid ester group and (meth)acrylate having a silane group; a polythiol compound; and a polytetrafluoroethylene resin as a solid lubricant.