Michael-Addition Anchor Resin for Fast Cold-Cure Pull-Out Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chemical fixing technologies face challenges in combining rapid low-temperature hardening with high pull-out values, and they often include hazardous ingredients that are not storage-stable as two-component systems.
Innovation Solution
A synthetic resin system comprising α,β-unsaturated compounds, CH-acidic methylene group-containing compounds, and a catalyst, which utilizes Michael addition hardening, allowing for a two-component form that is stable and non-hazardous, achieving high crosslinking indices and suitable for anchoring in substrates like concrete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If free-radical-polymerisable systems are used for rapid low-temperature hardening, then hardening speed is improved, but pull-out values remain relatively low and shrinkage is high
Solution Approach 1:
The patent combines two different hardening mechanisms (free-radical polymerisation and Michael addition) into a single hybrid system. The resin composition contains both free-radical-polymerisable ethylenically unsaturated compounds and compounds capable of Michael addition, allowing the system to achieve both rapid hardening and high pull-out values by utilizing the complementary strengths of both reaction pathways.
Solution Approach 2:
The invention creates a composite chemical system that integrates multiple reactive components: free-radical initiators, Michael donors, and Michael acceptors. This composite approach enables the resin to exhibit dual hardening behavior, combining the speed advantage of free-radical polymerisation with the strength advantage of Michael addition crosslinking.
2Strength
If epoxy/amine-based systems are used to achieve high pull-out values, then strength is improved, but hardening speed at low temperatures becomes significantly slower
Solution Approach 1:
The patent merges epoxy/amine chemistry with Michael addition chemistry in a hybrid system. The resin contains both epoxy groups and Michael donor groups, while the hardener contains both amine groups and Michael acceptor groups. This allows the system to achieve high pull-out values through dual mechanisms: the traditional strong epoxy-amine bonds and the additional Michael addition crosslinks, while maintaining faster hardening than pure epoxy/amine systems.
3Strength
If hybrid systems containing peresters and amines are used to achieve dual hardening, then both rapid hardening and high strength are improved, but storage stability deteriorates due to rapid reaction between peresters and amines
Solution Approach 1:
The patent extracts the problematic perester component from the hybrid system and replaces it with a peroxide that does not rapidly react with amines during storage. This allows the system to maintain dual hardening capability (free-radical and Michael addition) while achieving storage stability as a two-component system. The Michael addition components are formulated to remain stable until activation.
Solution Approach 2:
The invention introduces a stable peroxide as an intermediary that can initiate free-radical polymerisation without the storage instability issues of peresters. This intermediary approach allows the system to achieve rapid hardening through peroxide decomposition while maintaining compatibility with amine-containing hardeners during storage.
4Strength
If conventional fixing systems are used to achieve high performance, then pull-out values are improved, but hazardous ingredients are present that require special handling and reduce ease of operation
Solution Approach 1:
The patent employs a two-component system design where the reactive components are separate during storage but combine during application. This allows the use of potent reactive chemicals (Michael donors and acceptors) that provide high performance when cured, while maintaining safety during storage and handling as stable, non-hazardous separate components. The system is designed for single-use mixing at the point of application.
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 achieves rapid low-temperature hardening with high pull-out values and thermal stability, suitable for building site conditions, while avoiding hazardous ingredients and maintaining storage stability as a two-component system.
Implementation Method 1
use is made of a synthetic resin system which includes the starting materials for a Michael addition (C-Michael addition)
Data Source
AI summary
Use of a synthetic resin system as an adhesive for chemical fixing technology, especially for fixing anchoring means in drilled holes, which synthetic resin system includes a) a reaction resin based on α, β-unsaturated compounds, b) a reaction resin based on compounds that include CH-acidic methylene groups, and c) a catalyst, and to related subject matter.