Highly Branched Polymer Synthesis via High-Throughput Screening

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Solution Overview

Problem

Current methods for synthesizing highly branched polymers require careful control of monomer conversion to prevent network formation or gelation, limiting their efficiency and versatility.

Innovation Solution

The use of high throughput screening (HTS) techniques in combination with the Strathclyde method to optimize reaction conditions, allowing for the rapid production of soluble, highly branched polymers with controlled molecular weight and degree of branching, using monofunctional and multifunctional (meth)acrylic acid alkyl esters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional radical polymerization is used to synthesize highly branched polymers, then soluble polymers with low viscosity can be produced, but monomer conversion must be carefully controlled to prevent network formation or gelation

Engineering Contradiction:

Improvesolubility and low viscosityVSAvoidmonomer conversion control

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent uses thiol chain-transfer agents as intermediaries to control the polymerization process. The thiol CTAs mediate between the monomers and branching agents, suppressing gelation through reversible chain transfer while enabling high monomer conversion. This intermediary mechanism allows the system to achieve both high productivity and reliable solubility without direct harmful interaction between competing reaction pathways.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If extensive screening of different variables is performed to optimize polymerization conditions, then successful branched polymer synthesis can be achieved, but the process becomes time-consuming and complex

Engineering Contradiction:

Improvedegree of branching controlVSAvoidscreening time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent systematically varies key parameters including feed ratios of monomer to branching agent, thiol CTA concentration, and reaction temperature. By changing these parameters in a structured manner, the invention identifies optimal conditions for controlling degree of branching and molecular weight without requiring exhaustive screening of all possible variables, thus reducing time loss while maintaining manufacturing precision.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent performs preliminary optimization of the thiol CTA to branching agent ratio before conducting full polymerization screening. This preliminary action establishes a foundation that reduces the complexity of subsequent variable screening, allowing faster optimization of polymerization conditions while maintaining precise control over branching characteristics.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If high polymer concentrations are used to increase productivity, then polymer production efficiency improves, but network formation or gelation is more likely to occur

Engineering Contradiction:

Improvepolymer production efficiencyVSAvoidnetwork formation and gelation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The thiol chain-transfer agent acts as a protective intermediary that enables high polymer concentrations to be used without gelation. The thiol reversibly transfers chain ends, preventing the formation of permanent crosslinks even at high concentrations, thus allowing productivity improvement without introducing the harmful effect of network formation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent optimizes the concentration of thiol CTA relative to polymer concentration. By adjusting this parameter, the system maintains suppression of gelation mechanisms even when polymer concentration is increased for productivity, allowing the harmful effect of network formation to be avoided while achieving high production efficiency.

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

HTS enables efficient production of highly branched polymers with desired properties, facilitating their application in various polymerization techniques and ensuring reproducible results, including continuous flow synthesis.

Implementation Method 1

Methodology Applied

Scientific EffectHigh throughput screening:

Implementation Method 2

The Strathclyde method enables the generation of highly branched soluble polymers through conventional radical polymerization

Methodology Applied

Scientific EffectRadical polymerization:

Data Source

PatentUS20250236694A1Synthesis of highly branched polymers via high throughput screening

Publication Date: 2025.07.24 MITSUBISHI CHEM CORP

AI summary

Efficient condition optimization for the synthesis of highly branched polymers using high throughput screening has been developed. This innovation allows rapid production of soluble, highly branched polymers with different properties (molecular weight, degree of branching, etc.). Moreover, this versatile technique has the potential to be extended to other monomer/linker systems and polymerization techniques such as emulsion or suspension polymerization, anionic polymerization and continuous flow synthesis. A resin composition is further disclosed.