Transparent Thermoplastic Resin Composition Refractive Index Control
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Solution Overview
Problem
Conventional methods face difficulties in producing highly transparent thermoplastic resin compositions with adjustable refractive indices, often resulting in opaque materials due to phase separation when blending resins with different refractive indices.
Innovation Solution
Blending specific thermoplastic resins with structural units derived from (meth)acrylic acid ester and aromatic vinyl monomers, where one resin has hydrogenated aromatic double bonds, allows for adjustable refractive indices by varying the blending proportions, maintaining transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two or more thermoplastic resins are blended to improve properties such as heat resistance and impact resistance, then the functional properties are improved, but phase separation occurs causing the resin composition to become opaque
Solution Approach 1:
The patent changes the chemical structure parameters of the resin components by using copolymers with specific monomer compositions and hydrogenation degrees. By controlling the hydrogenation degree of aromatic vinyl units to 70-90%, the refractive index is adjusted to match between components, preventing phase separation while maintaining functional properties improvement through blending
Solution Approach 2:
The patent creates a composite resin system consisting of two specific copolymer types: one with aromatic vinyl units and another with hydrogenated aromatic vinyl units. This composite structure allows combining resins with different functional properties while maintaining transparency through controlled refractive index matching in the blended composition
2Illumination intensity
If resins with similar refractive indices are blended to maintain transparency, then transparency is maintained, but the ability to adjust refractive index becomes limited
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism where the refractive index of the resin composition can be continuously tuned by varying the blending ratio of the two copolymers. The hydrogenation degree parameter (70-90%) provides a controllable variable that enables systematic adjustment of refractive index while maintaining transparency, making the system adaptable to different optical requirements
Solution Approach 2:
By controlling the hydrogenation degree of aromatic vinyl units within the 70-90% range, the patent enables precise adjustment of the resin's refractive index. This parameter control allows the blended composition to achieve desired refractive indices while maintaining phase compatibility and transparency, overcoming the limitation of fixed refractive index values
3Illumination intensity
If conventional blending methods are used to produce transparent resin compositions, then transparency can be achieved with specific resin combinations, but the process requires special molecular design or additive incorporation
Solution Approach 1:
The patent enables the resin system to self-adjust for transparency through controlled phase compatibility. By designing copolymers with specific monomer compositions and hydrogenation degrees, the system achieves inherent phase compatibility without requiring additional transparency-enhancing additives or complex molecular design interventions, simplifying the overall production process
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 thermoplastic resin composition is highly transparent and can be tailored for various optical applications with refractive indices adjusted through blending ratios, eliminating the need for special molecular design or additives.
Implementation Method 1
comprising a thermoplastic resin (A) and a thermoplastic resin (B) blended therewith and said obtainable by blending of thermoplastic resin (A) and thermoplastic resin (B) through melt mixing
Implementation Method 2
the thermoplastic resin (B) obtained by hydrogenating 70% or more of aromatic double bonds of the aromatic-vinyl-monomer-derived structural unit
Data Source
Figure 1
AI summary
To provide a highly transparent thermoplastic resin composition without requiring, for example, a special molecular design or incorporation of an additive, with the refractive index of the composition being readily controllable. The highly transparent and refractive-index-controllable thermoplastic resin composition can be produced by blending a thermoplastic resin (A) containing a structural unit derived from a (meth)acrylic acid ester monomer represented by a specific chemical formula and a structural unit derived from an aromatic vinyl monomer represented by a specific chemical formula, with a thermoplastic resin (B) obtained by hydrogenating aromatic double bonds of a thermoplastic resin which contains a structural unit derived from a (meth)acrylic acid ester monomer represented by a specific chemical formula and a structural unit derived from an aromatic vinyl monomer represented by a specific chemical formula.