Polyester Resin Bridged Ring Structure Heat Resistance Transparency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional polyester resins face limitations in UV resistance, light transmittance, and heat resistance, with aliphatic polyesters offering good transparency but inadequate heat resistance, and norbornane-based resins requiring further improvements.
Innovation Solution
A polyester resin with a constitutional unit featuring a specific alicyclic structure is developed, comprising a compound polymerized using a Diels-Alder reaction and hydroformylation, enhancing heat resistance and transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If aromatic dicarboxylic acid components are used in polyester resins, then heat resistance is improved, but UV resistance and light transmittance deteriorate
Solution Approach 1:
The patent changes the chemical structure parameters by introducing a specific alicyclic structure with bridged ring configuration (formula 1) that has rigid skeleton and specific spatial arrangement. This structural parameter change allows achieving high glass transition temperature (heat resistance) while maintaining light transmittance and UV resistance, resolving the contradiction between heat resistance and optical properties
Solution Approach 2:
The patent creates a composite molecular structure by combining the specific alicyclic constitutional unit (formula 1) with other polyester components. The unique bridged ring structure acts as a composite structural motif that provides both thermal stability and optical clarity, simultaneously achieving heat resistance and good UV/light resistance
2Illumination intensity
If aliphatic polyesters with 1,4-cyclohexanedimethanol are used, then transparency is improved, but heat resistance deteriorates
Solution Approach 1:
The patent introduces a specific alicyclic structure (formula 1) with rigid bridged ring skeleton that changes the molecular packing and intermolecular interaction parameters. This structural modification increases the glass transition temperature to 105°C or higher while maintaining transparency, thus improving heat resistance without sacrificing optical clarity
3Temperature
If norbornane skeleton polyesters are used, then heat resistance is improved compared to 1,4-cyclohexanedimethanol polyesters, but further improvements are required
Solution Approach 1:
The patent further optimizes the structural parameters by designing a specific bridged ring alicyclic structure (formula 1) with controlled substitution patterns (R1, R2, R3 groups). This precise structural design achieves glass transition temperature of 105°C or higher while maintaining good transparency and processability, providing satisfactory overall performance
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 polyester resin exhibits excellent heat resistance and transparency, making it suitable for optical, electronic, and medical applications while maintaining good moldability and flowability.
Implementation Method 1
A polyester resin with a constitutional unit featuring a specific alicyclic structure is developed, comprising a compound polymerized using a Diels-Alder reaction
Implementation Method 2
comprising a compound polymerized using a Diels-Alder reaction and hydroformylation
Data Source
Figure 1~2
Figure 3
AI summary
A polyester resin according to the present invention comprises a constitutional unit represented by general formula (1): wherein R1 is a hydrogen atom, CH3, or C2H5; and R2 and R3 are each independently a hydrogen atom or CH3.