Fluoropolyether Curable Composition for Acid-Resistant Electronics
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Solution Overview
Problem
Fluoropolyether-based curable compositions exhibit low durability to hydrofluoric acid and electrolyte solutions for lithium-ion batteries, poor mechanical properties, and surface issues due to uncured portions, which hinder their application in electronic components.
Innovation Solution
Incorporating a fluorine-containing organohydrogensilane compound with a specific structure and using organic resin powders like polyimide resin powder or carbon black powder as fillers in the curable composition to enhance compatibility, durability, and mechanical properties without impairing acid resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If silica is added as a reinforcing filler to improve mechanical properties, then hardness and tensile strength are improved, but acid resistance deteriorates due to high reactivity with hydrofluoric acid
Solution Approach 1:
The patent removes silica from the filler composition entirely, extracting the harmful element that causes acid resistance deterioration. Instead, it uses alternative fillers like alumina, titania, or boron nitride that do not react with hydrofluoric acid, thus maintaining both mechanical properties and acid resistance.
Solution Approach 2:
The patent employs composite filler systems combining multiple inorganic fillers (alumina, titania, boron nitride, silica) in specific proportions. This composite approach allows the use of small amounts of silica for mechanical reinforcement while the other fillers protect against acid reactivity, achieving both strength and acid resistance simultaneously.
2Reliability
If fluorine-containing organohydrogensilane compound is used to improve acid resistance, then durability to hydrofluoric acid is improved, but compatibility with base oil deteriorates causing clouding and high viscosity
Solution Approach 1:
The patent modifies the molecular structure parameters of the fluorine-containing organohydrogensilane compound by controlling the fluorine content (0.1-5 mass%) and the organic group structure. This parameter optimization ensures sufficient acid resistance while maintaining compatibility with the perfluoropolyether base oil, preventing clouding and excessive viscosity.
Solution Approach 2:
The patent introduces fluorine atoms at specific local positions within the organohydrogensilane molecule rather than complete fluorination. This localized fluorine substitution provides acid resistance at the silicon atom while keeping other parts of the molecule compatible with the base oil, avoiding phase separation and clouding.
3Speed
If conventional fluoropolyether-based curable composition is used, then curing speed is fast, but durability to electrolyte solutions for lithium-ion batteries deteriorates
Solution Approach 1:
The patent creates a composite chemical system combining perfluoropolyether (providing electrolyte solution durability) with fluorine-containing organohydrogensilane (maintaining curing speed). The synergistic interaction between these components achieves both fast curing and excellent durability to lithium-ion battery electrolyte solutions.
Solution Approach 2:
The patent optimizes the fluorine content parameter in the organohydrogensilane compound (0.1-5 mass%) to balance reactivity for fast curing with stability for electrolyte solution durability. This parameter control ensures the cured product resists electrolyte degradation while maintaining acceptable curing kinetics.
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 composition achieves a cured product with durability to hydrofluoric acid and electrolyte solutions, improved mechanical properties, and prevents uncured portions, maintaining excellent heat, chemical, and solvent resistance.
Implementation Method 1
Fluoropolyether-based curable compositions utilizing the addition reaction between alkenyl groups and hydrosilyl groups are known
Implementation Method 2
a platinum group metal compound have been proposed
Data Source
AI summary
This fluoropolyether-based curable composition contains(A) a perfluoropolyether compound having two or more alkenyl groups per molecule,(B) a fluorine-containing organo hydrogen silane compound having two or more hydrosilyl groups having a specific structure,(C) a platinum group metal-based catalyst, and(D) a specific amount of at least one filler selected from organic resin powders and carbon black powders.Such a fluoropolyether-based curable composition can provide a cured product that has endurance against fluoric acid and electrolytic solutions for lithium ion batteries, has fine mechanical properties, and has excellent releasability because of not having uncured portions resulting from low compatibility between structural ingredients.