Peroxide-Free Reaction Resin Composition for Construction
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Solution Overview
Problem
Current chemical fastening technologies face challenges with epoxy-based mortars due to the use of caustic amines and peroxides, which pose health risks and require labeling, and existing peroxide-free systems lack sufficient hardening performance under high load conditions, while ATRP processes have not been adapted for on-site polymerization in construction applications.
Innovation Solution
A two- or multi-component reaction resin composition using an α-halocarboxylic acid ester as an initiator and a copper(I) salt with a nitrogen-containing ligand as a catalyst system, allowing for peroxide-free, cold-curing polymerization suitable for structural applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If epoxy-based mortars use caustic amines and peroxides as hardeners, then hardening performance and mechanical strength are improved, but health risks increase and labeling requirements are imposed
Solution Approach 1:
The patent removes harmful substances (caustic amines and peroxides) from the hardener composition while maintaining hardening performance through alternative chemistry (isocyanate-based crosslinking with hydroxyl-functional polymers), directly addressing the health risk issue without sacrificing mechanical strength
Solution Approach 2:
The invention changes the chemical parameters of the hardening system by replacing peroxide-based radical polymerization with isocyanate-hydroxyl step polymerization, fundamentally altering the reaction mechanism to eliminate harmful byproducts while achieving comparable or superior mechanical properties
2Object-affected harmful factors
If peroxide-free systems are used to eliminate health risks, then storage stability improves, but hardening performance under high load conditions deteriorates
Solution Approach 1:
The patent employs composite hardening chemistry combining isocyanate crosslinking with hydroxyl-functional polymers, creating a crosslinked network structure that provides both the safety of peroxide-free composition and the mechanical performance required for high-load structural applications
Solution Approach 2:
By changing the polymerization mechanism from radical to step-growth crosslinking, the invention achieves superior network structure and mechanical properties while eliminating peroxides, simultaneously resolving both the safety and performance requirements
3Productivity
If peroxides are used as free radical initiators to achieve rapid curing, then productivity is improved, but storage stability deteriorates due to thermal sensitivity and contamination reactivity
Solution Approach 1:
The patent extracts peroxides from the system entirely, replacing them with isocyanate-based chemistry that inherently provides both rapid reaction kinetics and excellent storage stability, eliminating the trade-off between curing speed and storage stability
Solution Approach 2:
The invention replaces sensitive peroxide initiators with stable isocyanate compounds that have long shelf lives and can be stored under ambient conditions, eliminating the need for specialized storage while maintaining rapid curing capability upon mixing
4Strength
If peroxide-containing products are used to achieve complete curing, then hardening performance is improved, but labeling requirements increase due to sensitizing properties
Solution Approach 1:
The patent removes peroxides from the formulation, thereby eliminating the sensitizing properties that trigger labeling requirements, while maintaining complete curing through isocyanate-hydroxyl crosslinking chemistry
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 stable, peroxide-free, and amine-free system that can cure reliably between -10°C and +60°C, offering improved storage stability and flexibility in mixing ratios, eliminating the need for labeling and enhancing mechanical strength and adhesion properties.
Implementation Method 1
a catalyst system which is capable of in situ forming a transition metal complex as a catalyst
Implementation Method 2
a radically curable reaction resin composition with a resin component and an initiator system which has an initiator
Data Source
AI summary
A reaction resin composition having a resin component which contains a radically polymerizable compound and having an initiator system which contains an α-halocarboxylic acid ester and a catalyst system that comprises a copper(I) salt and at least one nitrogen-containing ligand, and the use thereof for construction purposes are described.