RAFT Agents Useful for Surfactant-Free Emulsion Polymerization

Latexes obtained by emulsion polymerization are currently used in synthetic elastomers, bulk plastics, and coating applications. In recent years, they have also been applied to the production of functional polymer colloids for electronic devices and biomedical fields. Typical emulsion polymerization involves the use of low molecular weight surfactants (emulsifiers) in order to polymerize hydrophobic monomers in water. However, when film is formed, low molecular weight surfactants tend to migrate to the interface between the film and air, which is known to lead to a decrease in quality in terms of water resistance, gloss, adhesion, etc. For these reasons, small molecule surfactant-free emulsion polymerization has attracted great interests in both academia and industry.

In recent years, latex synthesis via surfactant-free RAFT-mediated emulsion polymerization using trithiocarbonate compounds as chain transfer agents has been reported.) In this method, a hydrophilic macro RAFT agents with a molecular weight of several thousand are synthesized, and then hydrophobic monomers are added to produce a surfactant-free latex in one pot. This article presents RAFT agents that have been utilized in such polymerizations. In addition, latexes internally crosslinked with crosslinking agents to increase stability have also been reported. RAFT-mediated emulsion polymerization has the potential to be extended to a wide range of vinyl monomers and is a small molecule surfactant-free emulsion polymerization technique.

1. RAFT Agents Useful for Surfactant-Free Emulsion Polymerization

2. Latexes obtained by emulsion polymerization are currently used in synthetic elastomers, bulk plastics, and coating applications. In recent years, they have also been applied to the production of functional polymer colloids for electronic devices and biomedical fields. Typical emulsion polymerization involves the use of low molecular weight surfactants (emulsifiers) in order to polymerize hydrophobic monomers in water. However , when film is formed, low molecular weight surfactants tend to migrate to the interface between the film and air, which is known to lead to a decrease in quality in terms of water resistance, gloss, adhesion, etc. For these reasons, small molecule surfactant-free emulsion polymerization has attracted great interests in both academia and industry. Introduction

3. In recent years, latex synthesis via surfactant-free RAFT-mediated emulsion polymerization using trithiocarbonate compounds as chain transfer agents has been reported.   In this method, a hydrophilic macro RAFT agents with a molecular weight of several thousand are synthesized, and then hydrophobic monomers are added to produce a surfactant-free latex in one pot. This article presents RAFT agents that have been utilized in such polymerizations. In addition, latexes internally crosslinked with crosslinking agents to increase stability have also been reported.  RAFT-mediated emulsion polymerization has the potential to be extended to a wide range of vinyl monomers and is a small molecule surfactant-free emulsion polymerization technique. In recent years, latex synthesis via surfactant-free RAFT-mediated emulsion polymerization using trithiocarbonate compounds as chain transfer agents has been reported.   In this method, a hydrophilic macro RAFT agents with a molecular weight of several thousand are synthesized, and then hydrophobic monomers are added to produce a surfactant-free latex in one pot. This article presents RAFT agents that have been utilized in such polymerizations. In addition, latexes internally crosslinked with crosslinking agents to increase stability have also been reported.  RAFT-mediated emulsion polymerization has the potential to be extended to a wide range of vinyl monomers and is a small molecule surfactant-free emulsion polymerization technique.

4. Products

5. Product Number Product Name T4240 2,2'-[Thiocarbonylbis(sulfanediyl)]bis(2-methylpropanoic Acid) C3994 2,2'-[Thiocarbonylbis(sulfanediyl)]dipropionic Acid C3995 3-[[[(1-Carboxyethyl)thio]carbonothioyl]thio]propanoic Acid B6646 Benzyl Dodecyl Carbonotrithioate D5561 2-(Dodecylthiocarbonothioylthio)-2-methylpropionic Acid C3546 4-Cyano-4-[[( dodecylthio ) carbonothioyl ] thio ] pentanoic Acid B6789 2-[[( Butylthio ) carbonothioyl ] thio ] propanoic Acid

6. Application Latex synthesis via hydrophilic macro RAFT agent

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