High-Refractive-Index Acrylate Compositions With Higher Yield
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Solution Overview
Problem
Existing polymerizable compositions for optical components suffer from low yield due to the formation of insoluble oligomers, leading to suboptimal hardness and refractive index properties.
Innovation Solution
A combination of (meth)acryloyl-terminated monomers and oligomers is prepared through a reaction involving reactants with active hydrogen groups and an acrylating agent, using specific monomers and reactants with varying active hydrogen groups and (meth)acryloyl groups to enhance hardness and refractive index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional acrylating agents are used to prepare (meth)acryloyl-terminated monomers, then the monomers can be formed, but insoluble oligomers are formed leading to low yield
Solution Approach 1:
The patent changes the chemical parameters of the acrylating agent by using specific compounds (acryloyl chloride, methacryloyl chloride, acrylonitrile, methacrylonitrile) with controlled reactivity. The use of these specific acrylating agents with active hydrogen groups allows selective reaction while preventing unwanted oligomerization, thereby increasing yield and eliminating harmful insoluble oligomers.
Solution Approach 2:
The patent introduces functional groups (active hydrogen groups) at specific locations in the molecule structure. The acrylating agents contain specific functional groups that react selectively with terminal groups of monomers, ensuring localized reaction at desired positions while preventing random oligomerization throughout the system.
2Illumination intensity
If sulfur content is increased in polymerizable compositions, then refractive index improves, but hardness and thermomechanical properties may be compromised
Solution Approach 1:
The patent creates composite polymerizable compositions containing multiple components: (meth)acryloyl-terminated monomers with specific structures, crosslinking agents, and sulfur-containing compounds. This composite approach allows achieving high refractive index through sulfur content while maintaining hardness through the synergistic combination of crosslinked network structure and specific monomer configurations.
Solution Approach 2:
The patent optimizes the molecular structure parameters of monomers by controlling the values of 'a' (1-6) and 'b' (0 or 1) in the general formula, and by selecting specific R1 groups. These parameter changes allow tuning of the polymer network density and crosslinking efficiency, enabling simultaneous achievement of high refractive index and hardness.
3Productivity
If reaction conditions are optimized to increase yield, then production efficiency improves, but product quality (hardness and refractive index) may be affected
Solution Approach 1:
The patent uses specific acrylating agents as intermediary compounds that facilitate the reaction between monomers and crosslinking agents. These intermediaries contain active hydrogen groups that enable controlled reaction pathways, ensuring high yield while maintaining product quality through consistent molecular structure formation and preventing side reactions.
Solution Approach 2:
The patent establishes specific parameter ranges for monomer structure (a=1-6, b=0 or 1, specific R1 groups) and composition ratios that simultaneously optimize reaction efficiency and product properties. These parameter specifications ensure that high yield reactions produce polymers with the required hardness and refractive index.
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 resulting polymerizates exhibit high hardness and refractive index, suitable for optical components, with improved thermomechanical properties and increased yield.
Implementation Method 1
The (meth)acryloyl-terminated monomers that react in the presence of free radicals
Implementation Method 2
reacting reactants having active hydrogen groups with an acrylating agent
Data Source
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AI summary
Compositions including a combination of (meth)acryloyl-terminated monomers and oligomers prepared by co-reacting reactants having active hydrogen groups with an acrylating agent are disclosed. Polymerizates formed using the combinations of (meth)acryloyl-terminated monomers and oligomers exhibit a high hardness, excellent thermomechanical properties, and a high refractive index. The compositions can be used to fabricate optical components.