Encapsulated Aqueous Acrylate Coating for Screw Locking Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing adhesive and curing coatings for screws face issues with process reliability, pot life, mechanical durability, and chemical stability, particularly in water-based systems, and require improvements in breakaway torque and sealing properties.
Innovation Solution
A multi-component system comprising capsules containing polymerizable (meth)acrylate-functional binder and water, and a component with peroxodisulfate and encapsulated dibenzoyl peroxide initiators, which upon mixing, initiates a self-curing process to enhance adhesive effectiveness and mechanical durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If anaerobic adhesives are used as precoat for screw locking, then the liquid state allows easy application, but the liquid nature reduces grip strength
Solution Approach 1:
The patent changes the physical state parameter of the adhesive from liquid to solid form (granules, flakes, or powder) while maintaining application ease through the carrier substance that facilitates uniform coating during the screwing process
Solution Approach 2:
The patent introduces a carrier substance as an intermediary that enables easy application of the solid adhesive material. The carrier substance facilitates the distribution and application of granules/flakes/powder during screwing, bridging the gap between solid form and ease of application
2Strength
If polymerizable material with melting point of at least 30°C is used to improve grip strength, then grip strength increases, but the system becomes more complex
Solution Approach 1:
The patent extracts the polymerizable material from a complex multi-component liquid system and presents it in a simplified solid form (granules, flakes, or powder) that can be directly applied without complex mixing or handling procedures
Solution Approach 2:
The patent uses a simple carrier substance that can be easily applied and discarded after serving its purpose of delivering the adhesive during the screwing process, avoiding the need for complex reusable application systems
3Reliability
If lacquer coating is applied to protect adhesive composition, then leakage protection and grip improvement are achieved, but mechanical damage susceptibility increases
Solution Approach 1:
The patent removes the lacquer coating layer entirely and uses only the essential adhesive components in solid form, eliminating the source of mechanical damage susceptibility while maintaining leakage protection through the nature of the solid adhesive material itself
4Strength
If VOC-based adhesive coatings are used, then mechanical durability is achieved, but health risks from volatile organic compounds increase
Solution Approach 1:
The patent changes the chemical composition parameter by replacing VOC-based solvents with water-based or solvent-free adhesive systems, eliminating harmful emissions while maintaining the mechanical durability of the adhesive bond through the solid polymerizable material
Solution Approach 2:
The patent converts the potential harm of requiring solvents for adhesive application into a benefit by using water or no solvent at all, thereby eliminating VOC emissions while the solid form of the adhesive provides inherent leakage protection and mechanical durability
5Reliability
If multi-component system with capsules is used, then process reliability and pot life are improved, but the system complexity increases
Solution Approach 1:
The patent segments the adhesive system into distinct functional components (polymerizable material, carrier substance, optional initiators) that can be separately handled and applied, improving process reliability while the solid form of the polymerizable material simplifies the overall system compared to liquid multi-component 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 system provides increased breakaway torque and improved connection tightness, with enhanced process reliability and mechanical durability, especially when applied to screws.
Implementation Method 1
polymerization is initiated when two plates are joined using a screw... polymerizable (meth)acrylate-functional binder... peroxodisulfate initiator, encapsulated dibenzoyl peroxide initiator
Implementation Method 2
microcapsules containing an adhesive to be polymerized being destroyed during screwing, and the released adhesive coming into contact with the hardener contained in the coating
Data Source
AI summary
The invention relates to a multi-component system that comprises a first component, a second component and optionally one or more additional components, the first component comprising capsules that contain polymerizable (meth)acrylate-functional binder and water and the second component comprising a peroxodisulfate initiator, encapuslated dibenzoyl peroxide initiator and water.