Modification Initiator Preparation via Continuous Reactor Mixing

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Solution Overview

Problem

Existing methods for producing modification initiators face challenges such as excessive oligomer generation, reactor clogging, and reduced conversion rates, which hinder the efficient production of high-modification-rate initiators.

Innovation Solution

A method involving a continuous reaction process where a first fluid containing a modification functional group-containing compound and a conjugated diene-based monomer is reacted with a second fluid containing a polymerization initiation functional group-containing compound, maintaining a desired ratio to minimize side reactions and optimize solvent solubility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the ratio of modification functional group-containing compound to polymerization initiation functional group-containing compound is increased to improve modification rate, then excessive oligomers are generated causing reactor clogging and reduced conversion rate

Engineering Contradiction:

Improvemodification rateVSAvoidconversion rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-mixing the modification functional group-containing compound with a conjugated diene-based monomer before the polymerization reaction. This preliminary mixing ensures uniform distribution and controlled reactivity, preventing excessive oligomer formation while maintaining high modification rates. The monomer acts as a buffer that controls the release and reaction of the modification compound throughout the polymerization process.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If conventional batch processing is used to produce modification initiators, then side reactions occur reducing conversion rate, but continuous processing requires precise ratio control

Engineering Contradiction:

Improveconversion rateVSAvoidprocess control complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements continuous processing where the modification functional group-containing compound, conjugated diene-based monomer, and polymerization initiation functional group-containing compound are continuously fed and reacted. This continuous action maintains steady-state reaction conditions, improves conversion rates by minimizing side reactions, and allows for precise ratio control through flow rate management, resolving the contradiction between conversion rate and process control complexity.

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If modification functional group-containing compound is used in excess to achieve high modification rate, then solvent solubility decreases and oligomer generation increases

Engineering Contradiction:

Improvemodification rateVSAvoidsolvent solubility

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent uses a conjugated diene-based monomer as an intermediary substance between the modification functional group-containing compound and the polymerization initiation functional group-containing compound. This intermediary improves solvent solubility by providing a compatible medium, controls the reaction to prevent excessive oligomer generation, and enables high modification rates through controlled polymerization. The monomer acts as a bridge that reconciles the conflicting requirements of excess modification compound usage.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 enables the production of modification initiators with high modification rates and high conversion rates, while preventing reactor clogging and maintaining efficient reactant mixing.

Implementation Method 1

The solution polymerization SBR is produced using an anionic polymerization initiator

Methodology Applied

Scientific EffectAnionic polymerization: Chemical Bonding

Implementation Method 2

In order to reduce rolling resistance of a tire, there is a way to reduce the hysteresis loss of vulcanized rubber, and as an evaluation index of such vulcanized rubber, repulsive elasticity of 50° C. to 80° C., tan δ, Goodrich heat generation

Methodology Applied

Scientific EffectHysteresis: Hysteresis

Data Source

PatentUS12275806B2Method for preparing modification initiator and apparatus for preparing the same

Publication Date: 2025.04.15 LG CHEM LTD

AI summary

The present invention relates to a method for preparing a modification initiator, the method capable of reducing side reactions to the minimum and obtaining the modification initiator with a high conversion rate, and an apparatus for performing the same, wherein the method includes (S1) reacting a first fluid including a modification functional group-containing compound and a conjugated diene-based monomer and a second fluid including a polymerization initiation functional group-containing compound, and (S2) obtaining a third fluid including a modification initiator prepared by the reaction of Step S1, wherein the modification functional group-containing compound is used in a ratio of greater than 1 mole based on 1 mole of the polymerization initiation functional group-containing compound, the conjugated diene-based monomer is used in a ratio of 1 mole to 4 moles based on 1 mole of the modification functional group-containing compound, and Step S1 and Step S2 are continuously performed.