Kaneka Corporation

Tatsuya Henmi

Kirito Suzuki

Mitsuhiro Tamura

Atsushi Iida

An expandable poly methyl methacrylate particle including a polymer, which is obtained by a process including polymerizing monomers including 100 parts by weight of an acrylic monomer and from 0.05 to 0.15 parts by weight of a polyfunctional monomer. The acrylic monomer includes 90% to 98% by weight of methyl methacrylate and 2% to 10% by weight of an Calkyl acrylate, relative to a total weight of the methyl methacrylate and the Calkyl acrylate.

Expandable methyl methacrylate resin particles, pre-expanded particles, expansion molded article, and lost foam

An expandable thermoplastic resin particle including a polymer obtained by a process including polymerizing monomers including 60 to 80 parts by weight of &#x3b1;-methylstyrene and 40 to 20 parts by weight of acrylonitrile. A content of residual monomeric components in the expandable thermoplastic resin particle is not more than 0.5% by weight. When an expanded mold article is produced from the expandable thermoplastic resin particle at an expansion ratio of 10 times, foam cells in a cross section of the expanded mold article have an average chord length of from 20 &#x3bc;m to 60 &#x3bc;m.

Growing community of inventors

Takasago, Japan

Tatsuya Henmi