Solid Anaerobic Threadlocker Composition for Gap and Heat Resistance
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Solution Overview
Problem
Conventional liquid anaerobic threadlockers face challenges such as incomplete curing through large gaps, difficulty in curing exposed bondlines due to air exposure, and poor solvent resistance, leading to potential contamination and integrity issues.
Innovation Solution
An anaerobically curable composition comprising a liquid anaerobically curable component, a solid anaerobically curable component, a solid thermoplastic polyether polyurethane resin, and a curing component, which can be formulated into a solid form suitable for various applications, including tape or filament, providing a balanced threadlocking and adhesive performance with improved thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid anaerobic threadlockers are used, then they provide excellent threadlocking and sealing properties when cured, but they remain in liquid form until cured which causes handling difficulties and potential contamination
Solution Approach 1:
The patent changes the physical state parameter of the threadlocking composition from liquid to solid by incorporating wax and filler materials. This transformation maintains the anaerobic curing mechanism while improving handling characteristics, allowing the composition to be applied as a solid that melts or softens during application and then cures to a strong lock
Solution Approach 2:
The invention creates a composite material system combining anaerobically curable resin, wax, and filler materials. This composite approach allows the composition to exhibit solid-like handling properties while retaining the chemical reactivity needed for anaerobic curing, effectively merging the benefits of both liquid and solid forms
2Reliability
If conventional liquid anaerobic compositions are used, then they cure in the absence of oxygen, but they fail to cure properly when exposed to air at bondlines
Solution Approach 1:
The patent modifies the curing mechanism by introducing a dual-cure system that combines anaerobic curing with heat-activated curing. The composition contains initiators that respond to both anaerobic conditions and thermal energy, allowing the same material to cure effectively in either environment depending on which trigger is present
Solution Approach 2:
The invention formulates a composite resin system that incorporates multiple initiator types and curing mechanisms. This composite approach enables the material to adapt to different environmental conditions, curing anaerobically when oxygen-excluded but also curing when heated, thus tolerating a broader range of application environments
3Reliability
If large gaps are present in threaded parts, then complete curing of the threadlocker is difficult, but using fillers may improve this
Solution Approach 1:
The patent develops a composite formulation incorporating specific filler materials designed to improve flow and curing in gap applications. These fillers are selected and sized to facilitate penetration into gaps while maintaining the anaerobic curing mechanism, creating a multi-component system that addresses gap-curing challenges
Solution Approach 2:
The invention utilizes filler materials with controlled porosity and surface characteristics that enhance the composition's ability to penetrate and cure in gap structures. The porous or surface-modified fillers provide pathways for the resin to flow into and throughout the gap region, ensuring complete curing even in challenging geometries
4Temperature
If thermal resistance is required at elevated temperatures, then the composition must maintain integrity, but conventional anaerobic threadlockers may degrade
Solution Approach 1:
The patent formulates a high-temperature-resistant composite by selecting resin, wax, and filler materials specifically chosen for their thermal stability. This composite system maintains structural integrity and bonding strength at elevated temperatures where conventional anaerobic threadlockers would degrade, extending the operational temperature range
Solution Approach 2:
The invention modifies the chemical composition parameters to enhance thermal resistance, using high glass transition temperature resins and thermally stable additives. These parameter changes shift the material's thermal performance characteristics, allowing it to withstand higher operating temperatures without losing mechanical properties or bonding strength
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 composition achieves robust threadlocking and adhesive performance with breakaway torque values greater than 10 Nm and maintains integrity at elevated temperatures, ensuring effective bonding and resistance to environmental interactions.
Implementation Method 1
Anaerobically curable compositions are those which are stable in the presence of oxygen, but which polymerize in the absence of oxygen
Implementation Method 2
Polymerization is initiated by the presence of free radicals, often generated from peroxy compounds
Implementation Method 3
The compositions are thermally resistant at temperatures of at least 150° C.
Data Source
AI summary
An anaerobically curable composition comprising:a liquid anaerobically curable component;a solid anaerobically curable component;a solid polyether thermoplastic polyurethane resin; anda curing component for curing the anaerobically curable components.Advantageously, the compositions of the invention are substantially solid and may be used as threadlockers.