Curable Vinyl Ester Compositions for Balanced Toughness and Thermal Resistance
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Solution Overview
Problem
Existing vinyl ester resin-based composite materials face challenges in achieving a balance between toughness, high-temperature resistance, and humidity resistance, often degrading one property when improving another, and have high viscosity issues that complicate industrial-scale use, particularly in injection operations.
Innovation Solution
A curable composition combining a polymerizable vinyl ester compound, sulfonated polyaromatic thermoplastic polymer, and specific non-vinyl ester polymerizable compounds, such as those with isocyanurate and carbopolycyclic groups, which includes bisphenolic A units, novolac units, and N-vinyl lactam, formulated to provide a balanced performance in toughness, high-temperature resistance, and humidity sensitivity, with a viscosity suitable for industrial use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sulfonated polyaromatic thermoplastic polymer is incorporated to improve toughness, then toughness increases, but resistance to high temperatures and humidity deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the polymer system by introducing specific functional groups (isocyanurate and carbopolycyclic) that modify the polymerization behavior and crosslinking density, achieving a balance between toughness and environmental resistance
Solution Approach 2:
The patent creates a composite chemical system combining vinyl ester resin with specific non-vinyl ester polymerizable compounds (isocyanurate and carbopolycyclic groups) that work synergistically to achieve both improved toughness and maintained environmental resistance
2Ease of operation
If curable composition is heated to reduce viscosity for injection, then viscosity decreases, but energy consumption and processing complexity increase
Solution Approach 1:
The patent changes the chemical composition parameters by adding specific polymerizable compounds that reduce the activation energy required for polymerization, allowing the resin to achieve suitable viscosity at lower temperatures
Solution Approach 2:
The non-vinyl ester polymerizable compounds act as intermediaries that facilitate the polymerization process at lower temperatures, mediating between the vinyl ester monomers and the final polymer network
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 results in materials with improved toughness, resistance to high temperatures, and moderate humidity sensitivity, with a viscosity suitable for industrial-scale implementation, including injection molding techniques, while maintaining balanced properties.
Implementation Method 1
monomers, oligomers and/or prepolymers capable of leading by polymerization/crosslinking to the formation of an infusible and insoluble material
Implementation Method 2
a first non-vinyl ester polymerizable compound, or compound 1, which comprises at least one isocyanurate group carrying at least two (meth)acrylate groups; and a second non-vinyl ester polymerizable compound, or compound 2, which comprises at least one carbopolycyclic or heteropolycyclic group carrying at least two (meth)acrylate groups
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3C
AI summary
The invention relates to a curable composition containing a vinyl ester polymerisable resin, together with a sulfonated poly-aromatic thermoplastic polymer and an N-vinyl lactame. The composition is characterised in that it also comprises: a first non-vinyl-ester polymerisable compound comprising at least one isocyanurate group bearing two (meth)acrylate groups, and a second non-vinyl-ester polymerisable compound comprising at least one carbopolycyclic or heteropolycyclic group bearing at least two (meth)acrylate groups. The invention also relates to a material obtained by curing said composition. The invention is suitable for composite materials and adhesives.