Solvent-Resistant Polymer via Chain Transfer Mediator
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Solution Overview
Problem
Existing methods for preparing polymers with resistance to both polar and non-polar solvents, such as those used in cosmetics, face challenges due to phase separation issues during solution polymerization, making it difficult to achieve suitable polymers with balanced hydrophilicity and hydrophobicity.
Innovation Solution
A polymer comprising specific ratios of hydrophilic, hydrophobic, and vinyl monomer units, allowing for stable formation and low solubility in both polar and non-polar solvents through solution polymerization, with the hydrophobic monomer having a solubility parameter of less than 10.0 (cal/cm³)¹⁄₂ and the hydrophilic monomer having a parameter of 10.0 (cal/cm³)¹⁄₂ or more, along with a vinyl monomer to prevent phase separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrophilic and hydrophobic monomers are copolymerized in appropriate ratios, then the polymer exhibits resistance to both polar and non-polar solvents, but phase separation occurs during polymerization making it difficult to obtain suitable polymer
Solution Approach 1:
A chain transfer agent is introduced as an intermediary substance during the polymerization process. This chain transfer agent mediates between the hydrophilic and hydrophobic monomers, preventing phase separation by controlling the polymerization kinetics and ensuring homogeneous copolymer formation while maintaining the desired solvent resistance properties
Solution Approach 2:
The polymerization parameters are optimized by controlling the reaction temperature, monomer feed ratio, and chain transfer agent concentration. These parameter changes enable stable copolymerization of hydrophilic and hydrophobic monomers without phase separation, while achieving the target solvent resistance and molecular weight distribution
2Ease of manufacture
If solution polymerization method is used, then the polymer can be prepared by a simple method, but phase separation occurs making it more difficult to obtain suitable polymer
Solution Approach 1:
The chain transfer agent serves as a mediator in solution polymerization, maintaining monomer solubility and preventing phase separation throughout the polymerization process. This enables the use of simple solution polymerization methods while achieving uniform copolymer composition and avoiding precipitation issues
Solution Approach 2:
By optimizing the solvent type, monomer concentration, and chain transfer agent dosage in the solution polymerization system, the method achieves both simplicity and precision. The parameter optimization ensures homogeneous polymer composition while maintaining ease of manufacturing through a single-step solution process
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 polymer exhibits low solubility in both polar and non-polar solvents, providing resistance to solvents like sweat and sebum, and can be efficiently formed by solution polymerization, suitable for applications in cosmetics and medical supplies.
Implementation Method 1
phase separation occurs in the polymerization process or prior to the process due to a difference in physical properties between the monomers
Data Source
AI summary
The present application relates to a polymer, a method for preparing the same, and a use thereof. The present application provides a polymer, a method for preparing the same, and a use thereof. The present application can provide: a polymer, which has a composition for allowing a low solubility in polar and non-polar solvents and can be prepared in a simple polymerization manner, such as solution polymerization; and a use thereof.