Resin Composition for Heat-Stable Transparent Dielectric Films
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Solution Overview
Problem
Resin compositions containing copolymers of 1,1-dicyanoethylene and a polymerizable monomer exhibit coloration upon heating, compromising transparency and dielectric properties.
Innovation Solution
Incorporating a specific amount of a Bronsted acidic compound into the resin composition stabilizes the partially conjugated structure of the copolymer, preventing coloration and maintaining excellent dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a copolymer containing 1,1-dicyanoethylene is used to achieve excellent transparency and dielectric properties, then the resin composition shows good optical and electrical performance, but the resin composition is colored by heating and the appearance is impaired
Solution Approach 1:
A Bronsted acidic compound is introduced as an intermediary substance to interact with the nitrile groups in the copolymer. The Bronsted acidic compound stabilizes the partially conjugated structure formed during heating, preventing the harmful coloration effect while maintaining the beneficial transparency and dielectric properties of the copolymer.
Solution Approach 2:
The chemical environment of the copolymer is modified by changing the concentration of Bronsted acidic compounds from 0.1 to 95,000 ppm. This parameter change transforms the resin composition's response to heat, stabilizing the conjugated structure and preventing coloration while preserving optical and electrical properties.
2Reliability
If a copolymer containing 1,1-dicyanoethylene is used to achieve excellent dielectric properties, then the resin composition shows good electrical performance, but the resin composition is colored by heating and the appearance is impaired
Solution Approach 1:
The Bronsted acidic compound acts as a mediator between the nitrile groups and the thermal environment. It specifically interacts with the nitrile groups to stabilize the conjugated structure that forms during heating, thereby preventing coloration while allowing the copolymer to maintain its excellent dielectric properties.
Solution Approach 2:
The invention creates a composite resin composition by combining the copolymer containing 1,1-dicyanoethylene with a Bronsted acidic compound. This composite structure leverages the dielectric properties of the copolymer while using the Bronsted acidic compound to counteract the coloration issue, achieving both electrical performance and appearance quality.
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 composition effectively suppresses coloration after heating while retaining superior dielectric properties, enabling the production of films and molded products with enhanced appearance and performance.
Implementation Method 1
a crosslinked structure is formed between nitrile groups present in a side chain of a copolymer (between nitrile groups derived from 1,1-dicyanoethylene) or between the nitrile group and a substituent group of a side chain derived from another monomer constituting the copolymer, and a conjugated structure in which double bonds are partially connected is formed, and as a result, coloration occurs by heating. In addition, as a result of further studies to suppress the coloration, it has been found that the conjugated structure can be stabilized by blending a specific amount of a Bronsted acidic compound in the resin composition
Data Source
AI summary
A resin composition capable of providing a film or the like that can suppress coloration even after heating is provided. Further, a molded product, a film, a conductive film, a film capacitor, a polarized material, an electrostatic induction conversion device, and a touch panel using the resin composition are provided. A resin composition including: a copolymer (A) containing a constitutional unit (a1) derived from 1,1-dicyanoethylene and a constitutional unit (a2) derived from a compound represented by the following general formula (I); and a Bronsted acidic compound (B), in which a content of the Bronsted acidic compound (B) in the resin composition is 0.1 to 95,000 ppm by mass.