| 摘要 |
PURPOSE:To obtain a copolymer excellent in heat stability, solvent solubility, etc. and suitable for primer, etc., by radical-polymerizing a monomer mixture comprising vinyl chloride, vinylidene chloride and gamma,gamma'-dichloroisobutylene at a specified weight ratio. CONSTITUTION:An essential monomer mixture comprising vinyl chloride (A), vinylidene chloride (B), gamma,gamma'-dichloroisobutylene (C) and other radical- polymerizable monomers (D) (e.g., acrylic acid) which are optionally used are mixed with each other so that the component C content may be 0.1-20wt% based on the essential monomer mixture and that the total amount of components A and B may account for the major proportion of the monomer mixture. The obtained monomer mixture is radicalpolymerized to obtain the purpose copolymer. The obtained copolymer can be suitably used for primers used before application of coating agents, binders for magnetic recording media, printing ink binders, etc. |
