Thermosetting (Meth)acrylate Composition Stabilizer
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Solution Overview
Problem
Existing compositions based on (meth)acrylates and peroxodicarbonates have limited storage stability and reactivity, making them unsuitable for complex industrial processes due to rapid curing at room temperature, which leads to processing challenges and inefficiencies.
Innovation Solution
A thermosetting composition comprising (meth)acrylates, peroxodicarbonates, sterically hindered phenols as stabilizers, and carbon allotropes with unsaturated carbon-carbon bonds, allowing for high reactivity while maintaining long processing times at room temperature, and enabling curing at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If peroxodicarbonates are used as radical initiators for (meth)acrylate polymerization, then reactivity and curing speed are improved, but storage stability deteriorates due to rapid decomposition at room temperature
Solution Approach 1:
A stabilizer compound is introduced as an intermediary substance that selectively interacts with peroxodicarbonates to prevent their premature decomposition at room temperature. The stabilizer forms a complex with the peroxodicarbonate, reducing its reactivity during storage, while allowing controlled decomposition and polymerization to proceed when activated by heat or other external stimuli.
Solution Approach 2:
The decomposition behavior of peroxodicarbonates is controlled by changing temperature parameters. The composition is designed to remain stable at room temperature (low parameter state) but undergo rapid decomposition and curing when heated to elevated temperatures (high parameter state), thus resolving the contradiction between storage stability and curing speed.
2Loss of time
If peroxodicarbonates with short half-life are used to achieve fast curing, then processing time is reduced, but storage time is limited and compositional stability is lost
Solution Approach 1:
The system transitions from a static, unstable state during storage to a dynamic, reactive state during processing. The stabilizer maintains the peroxodicarbonate in a dormant state during storage, then upon heating, the stabilizer's protective effect is overcome, allowing rapid decomposition and polymerization to occur, thus achieving both long storage time and fast processing.
3Temperature
If high reactivity formulations are used to achieve low curing temperatures, then energy consumption is reduced, but room temperature stability is insufficient leading to premature curing
Solution Approach 1:
The inherent high reactivity of peroxodicarbonates, which causes premature curing at room temperature, is converted into a benefit through the stabilizer. The stabilizer temporarily suppresses this reactivity during storage, then upon heating, the suppressed reactivity is released in a controlled manner, enabling low-temperature curing without premature reaction during handling and storage.
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 achieves a balance of high reactivity and extended processing time at room temperature, allowing for stable use in industrial processes without premature curing, and provides strong adhesion on temperature-sensitive substrates.
Implementation Method 1
at least one radical initiator based on a peroxo compound, wherein the peroxo compound comprises at least one peroxodic carbonate
Implementation Method 2
used as an initiator for the radical polymerization of compositions based on ethylenically unsaturated compounds
Implementation Method 3
at least one stabilizer comprising at least one sterically hindered phenol
Implementation Method 4
enabling curing at low temperatures
Data Source
AI summary
Example embodiments relate to a thermosetting composition, wherein the composition comprises the following components: (A) at least one radically curable compound, with the radically curable compound comprising at least one (meth)acrylate, (B) at least one radical initiator based on a peroxo compound, with the peroxo compound comprising at least one peroxodicarbonate, (C) at least one stabilizer comprising at least one sterically hindered phenol, and (D) at least one synergist based on a carbon modification having unsaturated carbon-carbon bonds.