Dry-to-Touch Anaerobic Adhesive for High-Temperature Threadlocking
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Solution Overview
Problem
Conventional threadlocking and sealant compositions face issues such as migration, contamination, and incomplete curing, especially in large gap applications and high-temperature environments, due to their liquid nature and sensitivity to air exposure.
Innovation Solution
A dry-to-the-touch adhesive/sealant composition incorporating a polymeric matrix with an anaerobically curable component, which remains non-flowable up to 300°C and features a dual cure system, allowing for effective threadlocking and sealing without premature curing, even in large gaps and high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid adhesive compositions are used for threadlocking and sealing, then excellent threadlocking and sealing properties are achieved when cured, but the compositions migrate and cause contamination in the general vicinity and environment during storage and application
Solution Approach 1:
The patent changes the physical state parameter of the adhesive composition from liquid to dry-to-the-touch form. This is achieved by incorporating the anaerobic curable resin into a carrier material that provides a dry, non-flowable consistency. The composition remains stable in this dry state during storage and application, preventing migration and contamination, while still achieving excellent threadlocking and sealing properties when cured between the mated parts.
2Ease of operation
If preapplied adhesive compositions in micro-encapsulated form are used, then convenience and ready-to-use properties are improved, but special processing is required and inventory management becomes complex
Solution Approach 1:
The patent extracts the anaerobic curable resin from its traditional liquid state and incorporates it into a dry carrier material. This extraction of the liquid phase eliminates the need for micro-encapsulation and special processing while maintaining the ready-to-use convenience. The composition can be simply applied to threads or sealing surfaces and will remain stable until cured between parts, avoiding inventory management complexities.
3Ease of operation
If wax or wax-like matrices are used to provide non-flowability, then ease of application is improved, but the compositions lose their non-flowable nature at temperatures above 180°F and begin to migrate
Solution Approach 1:
The patent creates a composite material by incorporating anaerobic curable resin into a suitable carrier material that maintains non-flowable properties across a wide temperature range. This composite formulation provides both ease of application (dry-to-the-touch consistency) and thermal stability (remains non-flowable at temperatures greater than 180°F), eliminating the temperature-related migration problem associated with wax-based systems.
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 provides a cost-effective, easy-to-apply solution that remains non-flowable at high temperatures, prevents migration, and ensures complete curing, enhancing threadlocking and sealing performance while maintaining product integrity and reducing contamination risks.
Implementation Method 1
anaerobically curable component dispersed within the polymeric matrix... compositions which are particularly useful in threadlocking and sealing applications... cure in the absence of air
Implementation Method 2
remains non-flowable at temperatures greater than 260° C. up to about 300° C.... prevents migration... maintaining product integrity
Data Source
AI summary
Dry-to-the-touch compositions containing a curable polymeric matrix and a curable anaerobic composition present within the polymeric matrix are disclosed. In a particularly desirable form, the compositions are moisture curable. The compositions are non-flowable at high temperatures and have an improved solvent resistance once cured.