Polyorganosiloxane Electrolyte Composition With Low Viscosity and High Voltage

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Solution Overview

Problem

Existing polyorganosiloxanes lack mechanical properties, flash point, and viscosity control, and electrolytic solutions face issues with solvent limitations and electrolytic capacitor performance, particularly in high refractive index and Abbe's number, hygroscopicity, and electrode protection.

Innovation Solution

A polyorganosiloxane with specific structural units and reactive functional groups, such as (meth)acryloyl groups, is developed to enhance mechanical properties, refractive index, Abbe's number, and electrolytic solution stability, allowing high withstand voltage and solubility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional plastic materials are used for optical lenses, then ease of molding and productivity are improved, but heat resistance and optical stability are insufficient

Engineering Contradiction:

Improveease of moldingVSAvoidheat resistance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent uses polyorganosiloxane as a composite material that combines the ease of molding of plastics with the heat resistance of silicone-based compounds. The specific molecular structure with Si-O-Si bonds provides thermal stability while maintaining moldability, resolving the contradiction between ease of molding and heat resistance.

Inventive Principle:

Principle #40Composite materials

2Length of stationary object

If materials with high refractive index are used for lenses, then lens thickness is reduced, but Abbe's number decreases leading to poor optical quality

Engineering Contradiction:

Improvelens thicknessVSAvoidAbbe's number

Core Design Contradiction:

Length of stationary objectVSManufacturing precision

Solution Approach 1:

The patent changes the chemical parameters of the lens material by introducing specific functional groups (cycloalkyl groups, aromatic groups) into the polyorganosiloxane structure. This allows simultaneous optimization of refractive index and Abbe's number, achieving both thin lens design and high optical quality without the traditional trade-off.

Inventive Principle:

Principle #35Parameter changes

3Strength

If polyorganosiloxane with high reactive functional group content is used, then mechanical properties and crosslinking are improved, but viscosity increases making handling difficult

Engineering Contradiction:

Improvemechanical propertiesVSAvoidviscosity

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent applies local quality by distributing reactive functional groups at specific positions in the molecular structure rather than uniformly throughout. The polyorganosiloxane has reactive groups (vinyl, hydroxyl, or carboxyl groups) attached to specific silicon atoms, allowing sufficient crosslinking for mechanical strength while maintaining lower overall viscosity for ease of handling and processing.

Inventive Principle:

Principle #3Local 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 polyorganosiloxane exhibits improved flash point, reduced viscosity, enhanced mechanical properties, and high refractive index, while the electrolytic solution provides superior electrode protection and high withstand voltage, addressing the limitations of existing materials.

Implementation Method 1

Methodology Applied

Scientific EffectViscosity reduction through molecular structure design:

Implementation Method 2

the electrolytic solution provides superior electrode protection and high withstand voltage

Methodology Applied

Scientific EffectElectrochemical stability:

Data Source

PatentUS12473405B2Polyorganosiloxane, polyorganosiloxane composition, cured product, polyorganosiloxane-containing electrolytic solution for electrolytic capacitor, and electrolytic capacitor using same

Publication Date: 2025.11.18 MITSUBISHI CHEM CORP

AI summary

A polyorganosiloxane may be high in elasticity and/or strength. The polyorganosiloxane may include an M unit (R1R2R3SiO1/2) at a content of 10 mol. % or more relative to the total of silicon and a T unit (R6SiO3/2) at a content of 80 mol. % or less relative to the total of silicon. The polyorganosiloxane may have an alkoxy group bound, at a content of 0.07 to 4 wt. %, based on total polyorganosiloxane weight, and a reactive functional group bound to silicon, with 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane. The weight loss of the polyorganosiloxane at 110° C. under 0.15 torr for 2 hours may be 5 wt. % or less.