Polycarbonate Resin Composition for Soluble Low-Viscosity Coatings
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Solution Overview
Problem
Existing polycarbonate resins have low solubility in carbonate-based solvents like propylene carbonate and high solution viscosity, making it difficult to form coating films with high transmittance and suitable viscosity for application.
Innovation Solution
A polycarbonate resin comprising specific structural units with defined ratios, allowing easy dissolution in carbonate-based solvents and achieving suitable viscosity and high transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polycarbonate resin is used in a carbonate-based solvent, then safety is improved, but solubility deteriorates
Solution Approach 1:
The invention changes the chemical structure parameters of the polycarbonate resin by incorporating specific structural units (A), (B), and (C) with defined ratios. Structural unit (A) contains fluorinated or chlorinated aromatic groups, structural unit (B) contains aliphatic cyclic groups, and structural unit (C) contains phenolic groups. This structural modification enables the resin to dissolve in carbonate-based solvents while maintaining safety
Solution Approach 2:
The invention creates a composite polycarbonate resin structure by combining three different structural units (A), (B), and (C) in specific proportions. This composite structure integrates the solubility-enhancing fluorinated/chlorinated aromatic groups with the structural integrity provided by aliphatic cyclic and phenolic groups, achieving both solubility in safe carbonate-based solvents and adequate mechanical properties
2Ease of operation
If the solution viscosity is low, then ease of operation is improved, but coating film formation deteriorates
Solution Approach 1:
The invention optimizes the solution viscosity parameter by controlling the resin's molecular structure and composition. The specific ratio of structural units (A) 20-50 mol%, (B) 5-20 mol%, and (C) 30-75 mol% produces a resin with moderate solution viscosity that allows easy application while maintaining sufficient flow characteristics for proper coating film formation
3Manufacturing precision
If the solution viscosity is high, then coating film formation is improved, but ease of operation deteriorates
Solution Approach 1:
The invention adjusts the viscosity parameter to an optimal range through molecular structure design. The combination of structural units (A) with fluorinated/chlorinated aromatic groups, (B) with aliphatic cyclic groups, and (C) with phenolic groups in specific proportions creates a resin solution with moderate viscosity that balances ease of application with coating film formation quality
4Object-affected harmful factors
If a polycarbonate resin dissolves in propylene carbonate, then safety is improved, but solution viscosity increases
Solution Approach 1:
The invention modifies the resin's molecular parameters by incorporating structural unit (A) with fluorinated or chlorinated aromatic groups that reduce intermolecular forces. This structural change enables the resin to dissolve in safe propylene carbonate while maintaining moderate solution viscosity through reduced molecular interactions
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 resin achieves easy dissolution in carbonate-based solvents, forming coating films with high transmittance and suitable viscosity, enhancing application flexibility and safety.
Implementation Method 1
a polycarbonate resin that is easily dissolved in a carbonate-based organic solvent such as propylene carbonate
Data Source
AI summary
According to the present invention, it is possible to provide a polycarbonate resin that contains a constituent unit (A) derived from a monomer represented by general formula (1), a constituent unit (B) derived from a monomer represented by general formula (2) and a constituent unit (C) derived from a monomer represented by general formula (3). Relative to the total amount of constituent units (A), (B) and (C) that constitute the polycarbonate resin, the proportion of constituent unit (A) is 20-50 mol %, the proportion of constituent unit (B) is 5-20 mol %, and the proportion of constituent unit (C) is 30-75 mol %.