| 摘要 |
PURPOSE:To obtain the titled high-purity monomer capable of producing molded articles having excellent physical properties, by radically polymerizing a radically polymerizable vinyl group-containing monomer in the presence of a chain transfer agent containing an alkyl ester group. CONSTITUTION:A radically polymerizable vinyl group-containing monomer (e.g. vinyl acetate, styrene, acrylonitrile, etc.) is radically polymerized in the presence of a chain transfer agent (e.g. dialkyl mercaptomalonate, dialkyl thiomalate, etc.) containing two alkyl ester groups to give a monomer containing an end structure shown by formula (R is alkyl) and having 2,000-15,000 number- average molecular weight and polycondensation properties. The average molecular weight of the macromonomer can be readily controlled.
|
