| 摘要 |
PURPOSE:To obtain a copolymer, having improved thermal stability, gas barrier property and moldability and suitable for molding materials used in packaging containers for foods, medicines, cosmetics, etc., by suspension polymerizing a monomer consisting of vinylidene chloride and an acrylic acid ester in a specific proportion. CONSTITUTION:85-98wt%, preferably 90-97wt% vinylidene chloride is suspension polymerized with 15-2wt%, preferably 10-3wt% acrylic acid ester expressed by the formula (R is 1-6C alkyl optionally having epoxy group), e.g. butyl acrylate, normally in the presence of an oil-soluble radical initiator, e.g. 2,2'-azobis-2,4-dimethylvaleronitrile, etc., high polymer suspension protective agent, e.g. methoxy cellulose and polyvinyl alcohol, etc., and aqueous medium.
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