Specialty Chemicals Home > Macro Azo initiators

Macro azo initiator (MAI) is a unique azo bis compound, which gives block polymer by polymerizing with radical polymeric vinyl monomer. MAI has repeated structural sequences of polymer segment and azo group and its molecule has several radical-generating sites. For this reason, MAI can be designed to produce polymer with high effect of blocked state. Since it dissolves in various solvents, it can be employed on a wide range of polymerizations such as solution polymerization, suspension polymerization and emulsion polymerization. Since MAI reacts with a variety of monomers in copolymerization, it is highly potential for molecule design of block polymer for any purpose. VPS series whose polymer segment is poly dimethylsiloxane and VPE series whose polymer segment is poly ethylene glycol are available in Wako. Besides, Wako undertakes custom manufacturing for various block polymers utilizing MAI.

VPS series has poly dimethylsiloxane (silicone) unit and its block polymer polymerized with vinyl monomer can easily reflect features such as heat resistance, water repellency, lubricating ability, mold releasing, biocompatibility and gas permeation in resin materials blending with other polymers. Currently, two types of products with different molar weight of poly siloxane unit are available.

VPE series has poly ethylene glycol (PEG) unit and its block polymer polymerized with vinyl monomer can easily reflect features such as hydrophilicity, dispersibility, antistatic property and anti-tarnish property in resin materials blending with other polymers. Currently, three types of products with different molar weight of poly ethylene glycol unit are available.

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