Hydrophobic Recycled Silica from Low-Temperature Silicone Depolymerization

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing methods for recycling silicone-containing polymeric materials require high temperatures and pressures, which are environmentally and financially undesirable.

Innovation Solution

A method involving mechanical breaking of polymeric articles into pieces, mixing with a solvent and catalyst, and separating recycled silica particles, which are hydrophobic and catalytically reactive, allowing for the recovery of polymer oil and silica particles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high temperature and high pressure methods are used to depolymerize silicone-containing polymeric materials, then depolymerization efficiency is improved, but environmental impact and cost increase

Engineering Contradiction:

Improvedepolymerization efficiencyVSAvoidenvironmental impact

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the parameters of the depolymerization process by using ambient temperature and pressure conditions instead of high temperature and pressure, thereby maintaining depolymerization efficiency while reducing environmental impact and cost

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical/thermal system (high temperature and pressure) with a chemical system using catalysts and solvents to achieve depolymerization under milder conditions, thus improving sustainability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If high temperature and high pressure methods are used to depolymerize silicone-containing polymeric materials, then depolymerization efficiency is improved, but cost increases

Engineering Contradiction:

Improvedepolymerization efficiencyVSAvoidcost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent changes the operational parameters from high temperature and pressure to ambient conditions, using catalysts and solvents to maintain depolymerization efficiency while significantly reducing manufacturing costs

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs inexpensive catalysts and solvents that can be used under ambient conditions, replacing expensive high-energy processing methods and reducing overall manufacturing costs

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Quantity of substance

If recycled silica particles are produced through conventional methods, then silica particles are obtained, but they lack hydrophobicity and catalytic reactivity

Engineering Contradiction:

Improvesilica particlesVSAvoidfunctional performance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The recycling process allows the silica particles to self-functionalize through the depolymerization reaction, where the catalyst and solvent treatment during recycling inherently imparts hydrophobicity and catalytic reactivity to the recovered silica particles

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The chemical environment parameters during the recycling process (catalyst presence, solvent type, reaction conditions) are optimized to transform the silica particle surface properties, giving them hydrophobicity and catalytic reactivity that conventional production methods cannot achieve

Inventive Principle:

Principle #35Parameter changes

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

Recycled silica particles exhibit hydrophobicity and catalytic reactivity, enabling their reuse in siloxane-containing polymer formulations without additional catalysts and providing improved mechanical and thermal stability.

Implementation Method 1

mixing a mixture comprising the silicone pieces, a solvent, and a catalyst, wherein the mixture provides a silicone oil and the population of recycled silica particles

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 2

the silica particles are hydrophobic

Methodology Applied

Scientific EffectHydrophobicity: Hydrophobe

Data Source

PatentUS20260035537A1Recycled silica particles

Publication Date: 2026.02.05 SAINT GOBAIN PERFORMANCE PLASTICS CORP

AI summary

A population of recycled silica particles includes: a plurality of individual silica particles, wherein the silica particles are hydrophobic. Further disclosed is a method of recycling a commercially available polymer article including: a) providing the commercially available polymer article; b) mechanically breaking the article into multiple polymer pieces, wherein the polymer includes at least one silicon-oxygen bond and a reinforcing silica filler; c) mixing a mixture including the polymer pieces, a solvent, and a catalyst, wherein the mixture provides a polymer oil and a population of recycled silica particles; and d) separating the polymer oil and the population of recycled silica particles from the mixture, wherein the population of recycled silica particles provides a plurality of individual silica particles.