Radically Curable Resin Mixture for Low Dispensing Force Fastening
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Solution Overview
Problem
Current radically curable fastening compositions face challenges with high viscosity, temperature-dependent performance, and increased volatile organic compounds (VOCs, leading to inconsistent curing and reduced load values, especially at extreme temperatures, and require high proportions of reactive diluents which affect resin performance and safety.
Innovation Solution
A mixture of low-viscosity urethane methacrylate, epoxy methacrylate, and branched urethane methacrylate compounds is used as the backbone resin to reduce viscosity and dispensing forces, increase load values, and minimize reactive diluent usage, while maintaining performance across a wide temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If high proportions of reactive diluents are used to reduce viscosity, then dispensing forces are reduced and processability is improved, but resin performance deteriorates and VOC content increases
Solution Approach 1:
The patent changes the chemical composition parameters of the backbone resin by selecting specific radically curable compounds with particular molecular structures and functionalities. This allows achieving the desired viscosity reduction and performance balance through compositional parameter optimization rather than simply increasing reactive diluent content
Solution Approach 2:
The patent creates a composite resin system by combining multiple radically curable compounds (epoxy resins, polyester resins, vinyl ester resins, or acrylic resins) in specific ratios. This composite approach allows synergistic effects where the combination provides both low viscosity and high performance, overcoming the limitations of individual resin components
2Ease of operation
If high proportions of reactive diluents are used to reduce viscosity, then dispensing forces are reduced, but volatile organic compounds (VOCs) increase leading to safety and environmental issues
Solution Approach 1:
The patent optimizes the chemical parameters of the resin system by selecting radically curable compounds with appropriate molecular weights, functional groups, and viscosities. This allows achieving low dispensing forces through controlled composition rather than excessive reactive diluents, thereby reducing VOC emissions while maintaining processability
Solution Approach 2:
The patent employs readily available radically curable compounds that can be fully cured to form stable crosslinked networks, ensuring complete consumption of volatile components during curing. This approach minimizes residual VOCs compared to systems relying on high reactive diluent content that may not fully evaporate or cure
3Ease of manufacture
If conventional resin compositions are used, then manufacturing simplicity is maintained, but temperature-dependent performance fluctuation occurs leading to inconsistent load values
Solution Approach 1:
The patent adjusts the chemical composition parameters of the resin system by incorporating radically curable compounds with specific functional groups and reactivity characteristics. This allows the curing reaction to proceed consistently across a wide temperature range, ensuring uniform crosslinking density and mechanical properties regardless of ambient temperature variations
Solution Approach 2:
The patent develops a composite resin formulation combining multiple radically curable compound types that complement each other's temperature-dependent reactivity. This composite system ensures that at least some curing reactions remain active across the full temperature range, maintaining consistent curing performance and load values from -30°C to +80°C
4Reliability
If radically curable compounds are used to improve curing consistency, then load values increase, but viscosity increases leading to higher dispensing forces
Solution Approach 1:
The patent optimizes the molecular weight, functional group density, and chain flexibility parameters of the radically curable compounds used. By carefully selecting compounds with appropriate viscosity characteristics and reactivity, the formulation achieves consistent curing performance without excessive viscosity, balancing processability with curing reliability
Solution Approach 2:
The patent creates a composite system where low-viscosity radically curable compounds are combined with higher-performance resin components. This composite approach allows the low-viscosity components to provide good flow and dispensing characteristics while the other components contribute to consistent curing and high load values, achieving synergistic performance
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 achieves lower dispensing forces and higher load values at low temperatures, reduces VOCs, and enhances the processability and curing behavior of reactive resin systems, providing improved performance and safety without relying on hazardous ingredients.
Implementation Method 1
Mixing the two components initiates curing of the mixed components. When the fastening compositions are used for fastening anchoring elements in boreholes, the curing takes place in the boreholes.
Data Source
AI summary
A mixture includes at least two radically curable compounds as a backbone resin, and is useful in reactive resins. In particular, the mixture reduces the viscosity of such reactive resin-containing mixtures and thus the dispensing forces required for ejecting the reactive resin components produced therefrom. The mixture also increases the performance of the reactive resins containing such mixtures and of the reactive resin components produced therefrom. Further, said reactive resins and the reactive resin components thereof are useful for construction purposes, in particular for chemical fastening.