Reactive Amine Accelerator for Epoxy Resin Curing
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Solution Overview
Problem
Conventional reactive resin accelerators, such as tertiary aromatic amines, pose health hazards and have limited commercial availability, and existing solutions for improving curing at room temperature are not stable or effective.
Innovation Solution
A reactive amine accelerator is synthesized by reacting a primary or secondary aromatic amine with an epoxide and an α,β-unsaturated carboxylic acid, which is covalently incorporated into the polymer network during curing, preventing diffusion and enhancing storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional tertiary aromatic amine accelerators are used, then curing at room temperature is enabled, but health hazards and limited commercial availability occur
Solution Approach 1:
The invention changes the chemical structure of the accelerator from conventional tertiary aromatic amines to reactive secondary aromatic amines with specific molecular weight ranges (150-300 g/mol). This parameter change maintains the room temperature curing capability while eliminating health hazards by incorporating the accelerator into the polymer network through reactive functional groups
Solution Approach 2:
The invention creates a composite structure where the accelerator molecule combines both the amine functional group (for catalysis) and reactive functional groups (for polymer network incorporation). This composite molecular structure allows the accelerator to serve dual purposes: enabling room temperature curing and becoming part of the final cured material, thereby eliminating health hazards
2Productivity
If tertiary aromatic amine accelerators are used, then curing speed is improved, but storage stability deteriorates due to accelerator diffusion
Solution Approach 1:
The invention merges the accelerator function with the polymer network by incorporating reactive functional groups into the accelerator molecule. This causes the accelerator to become covalently bonded within the polymer matrix during curing, preventing diffusion and maintaining storage stability while preserving curing speed
Solution Approach 2:
The reactive functional groups act as intermediaries that bridge the accelerator molecule and the polymer network. These groups enable the accelerator to participate in the polymerization process and become an integral part of the cured material, thereby preventing migration and improving storage stability
3Productivity
If additional accelerators are added to improve curing, then curing performance is enhanced, but system complexity and health risks increase
Solution Approach 1:
The invention makes the accelerator molecule multi-functional by incorporating both the catalytic amine group and reactive polymerizable groups. This allows a single component to perform multiple functions: accelerating curing, participating in polymerization, and becoming part of the final network, thereby eliminating the need for additional accelerators and reducing system complexity
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 reactive amine accelerator allows for effective curing at room temperature without additional accelerators, improving storage stability and safety by being fully incorporated into the polymer network, thus overcoming the limitations of existing accelerators.
Implementation Method 1
a reactive amine accelerator produced by reacting a primary or secondary aromatic amine with an epoxide and an α,β-unsaturated carboxylic acid
Implementation Method 2
the reactive amine accelerator according to the invention is almost completely incorporated into the polymer network during curing of the reactive resin
Data Source
AI summary
The present invention relates to a reactive amine accelerator which is produced by reacting a primary or secondary aromatic amine with a diglycidyl ether and an alpha, beta-unsaturated carboxylic acid. The invention further relates to the use of the reactive amine accelerator in a reactive resin, in particular based on an epoxy (meth) acrylate resin or urethane (meth) acrylic resin. The invention further relates to a reactive resin composition, in particular to epoxy (meth)acrylate resin and urethane (meth)acrylate resin base, comprising a claimed amine accelerator. The claimed amine accelerator is covalently incorporated into the polymer network.