Functionalized Polymer Stabilization for Mooney Viscosity Control

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Solution Overview

Problem

Silane functionalized polymers undergo significant hydrolysis and condensation when exposed to water, heat, and work, leading to excessive coupling and increased Mooney viscosity, making them unusable in certain applications.

Innovation Solution

The addition of an alkoxysilane to the polymer cement after silane attachment and polymerization, acts as a condensation suppressant, mitigating hydrolysis and condensation reactions and controlling polymer coupling and Mooney viscosity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If silane functional groups are attached to polymers to enable coupling, then polymer coupling capability is improved, but Mooney viscosity increases excessively making the polymer unusable

Engineering Contradiction:

Improvepolymer coupling capabilityVSAvoidMooney viscosity

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent introduces an alkoxysilane compound as an intermediary substance that mediates between the silane-functionalized polymer and water. This intermediary reacts with the silane functional groups to form a stable siloxane bond, preventing excessive hydrolysis and condensation that would otherwise cause uncontrolled Mooney viscosity increase. The alkoxysilane acts as a controlled coupling agent that enables polymer coupling while maintaining manageable viscosity levels.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the chemical parameters of the system by introducing specific alkoxysilane compounds with controlled molecular structures (such as triethoxysilane, tetraethoxysilane, or methyltriethoxysilane). By adjusting the type and amount of alkoxysilane additive, the patent controls the degree of hydrolysis and condensation reactions, thereby regulating the Mooney viscosity to usable levels while maintaining coupling capability.

Inventive Principle:

Principle #35Parameter changes

2Strength

If silane functionalized polymers are exposed to water and heat to complete hydrolysis and condensation, then coupling is enhanced, but polymer stability deteriorates

Engineering Contradiction:

ImprovecouplingVSAvoidpolymer stability

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by adding the alkoxysilane compound before complete hydrolysis and condensation occurs. This preliminary addition of the condensation suppressant prevents the polymer from undergoing uncontrolled hydrolysis and condensation that would compromise stability. The alkoxysilane pre-establishes a controlled reaction pathway that achieves necessary coupling while preserving polymer stability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent provides beforehand cushioning by introducing the alkoxysilane compound that cushions against excessive hydrolysis and condensation reactions. This cushioning effect prevents the polymer composition from becoming too unstable during the coupling process, maintaining a balanced state where coupling occurs but polymer integrity is preserved.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Strength

If condensation reactions proceed without suppression, then polymer coupling increases, but the range of useful applications decreases

Engineering Contradiction:

Improvepolymer couplingVSAvoidrange of useful applications

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The patent implements feedback control by using alkoxysilane compounds that respond to the hydrolysis and condensation process. The alkoxysilane adds a feedback mechanism that monitors and regulates the coupling reaction progress, preventing excessive condensation that would limit applications. This feedback-controlled approach maintains coupling capability while preserving polymer properties needed for various applications.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent utilizes parameter changes by adjusting the concentration and type of alkoxysilane additive to control the degree of coupling. By precisely controlling these parameters, the patent produces polymers with tailored coupling levels that maintain versatility for different applications while achieving necessary coupling strength.

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

This approach allows for the production of stable functionalized polymers with controlled Mooney viscosity, enabling a wider range of useful polymers across multiple industries.

Implementation Method 1

Silane functionalized polymers can hydrolyze and condense significantly through finishing when exposed to water, heat, and work

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Implementation Method 2

condensation of functional groups in the polymers results in coupling

Methodology Applied

Scientific EffectCondensation: Condensation

Implementation Method 3

reacting a condensation suppressant comprising an alkoxysilane with the aminosilane functionalized polymer to form a stable functionalized polymer

Methodology Applied

Scientific EffectChemical Bonding: Chemical Bonding

Data Source

PatentUS20250109229A1Method of producing functionalized polymers, rubber composition, and pneumatic tire

Publication Date: 2025.04.03 G-3 CHICKADEE PURCHASER LLC

AI summary

A process for producing a functionalized polymer includes reacting a condensation suppressant comprising an alkoxysilane with an aminosilane functionalized polymer to form a stable functionalized polymer in the polymer cement.