Triazine Polymer Solubility via Diamine Skeletons
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Solution Overview
Problem
Triazine-ring-containing polymers with high refractive index and lightfastness are challenging to dissolve in alkaline developers, limiting their suitability for pattern formation in electronic devices and optical materials.
Innovation Solution
A triazine-ring-containing polymer with a diamine-derived skeleton where two benzene rings are bonded with a hydroxyl group and a non-conjugated spacer, combined with crosslinking agents, enhances solubility in alkaline developers and maintains high refractive index and lightfastness, enabling fine pattern formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a triazine-ring-containing polymer with high refractive index and lightfastness is used, then optical performance is improved, but solubility in alkaline developer deteriorates
Solution Approach 1:
The patent modifies the chemical structure parameters of the polymer by introducing specific diamine-derived skeletons with non-conjugated spacer groups and controlling the number and arrangement of benzene rings. These parameter changes in molecular structure improve solubility in alkaline developers while preserving the high refractive index property of the triazine-ring-containing polymer.
Solution Approach 2:
The patent creates a composite polymer structure combining triazine rings with diamine-derived skeletons containing benzene rings and non-conjugated spacer groups. This composite structure integrates the high refractive index characteristic of triazine rings with the improved solubility provided by the diamine-derived skeleton, resolving the contradiction between optical performance and processability.
2Reliability
If an alicyclic structure is used to improve lightfastness, then lightfastness is improved, but refractive index deteriorates
Solution Approach 1:
The patent changes the structural parameters from alicyclic groups to aromatic benzene ring structures with non-conjugated spacers. This parameter change maintains the rigid backbone necessary for lightfastness while the aromatic character and electron distribution in benzene rings provide higher refractive index compared to alicyclic structures.
Solution Approach 2:
Instead of using alicyclic structures as reported in prior art to achieve lightfastness, the patent inverts the approach by using aromatic benzene ring structures with non-conjugated spacer groups. This inversion provides both lightfastness and superior refractive index, overcoming the trade-off limitation of the conventional alicyclic approach.
3Reliability
If crosslinking agents are added to improve lightfastness and heat yellowing resistance, then weather resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent selects crosslinking agents that serve multiple functions: they provide lightfastness through UV curing, achieve heat yellowing resistance through thermal crosslinking, and maintain compatibility with the polymer's solubility characteristics. This multi-functionality reduces the need for separate additives and simplifies the overall manufacturing process despite the enhanced performance requirements.
Data Source
AI summary
A triazine-ring-containing polymer characterized by including a repeating unit structure represented by formula (1).[In the formula, R and R′ each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group, andAr represents at least one selected from the group shown by formulas (2) and (3).[in the formulas, W1 and W2 each independently represent CR1R2 (R1 and R2 each independently represent a hydrogen atom or a C1-10 alkyl group optionally substituted by a halogen atom (where these together may form a ring)), C═O, S, SO, or SO2.]]