Denki Kagaku Kogyo Kabushiki Kaisha

Denka Company Limited

Tsutomu Kobari

Takashi Kawasaki

Shogo Hagiwara

Kazuhiro Kobayashi

Daisuke Shimiya

Jo Shinbori

Provided are an acrylic elastomer superior in adhesiveness to a fluorine-based elastomer, an acrylic elastomer composition containing the same, its laminate, and its crosslinked product and a molded article therefrom. Iodine groups are introduced as crosslinking groups into an acrylic elastomer to an iodine content of 0.1 to 2 mass % with respect to the total mass of the elastomer. In addition, 1 to 7 parts by mass of an organic peroxide and 1 to 5 parts by mass of an onium salt were blended with 100 parts by mass of the acrylic elastomer, to give an acrylic elastomer composition. Further, an acrylic elastomer layer of the acrylic elastomer composition is laminated with a fluorine-based elastomer layer of a fluorine-based elastomer composition mainly containing of a fluorine-based elastomer having iodine groups as crosslinking groups, to give a laminate. The laminate is then crosslinked to give a crosslinked product and a molded article.

Acrylic elastomer, acrylic elastomer composition, laminate, crosslinked product, and molded article

To provide an acrylic rubber composition having an excellent heat resistance, especially an excellent balance between the residual ratio of the tensile strength and the residual ratio of the elongation after heat aging, when formed into a vulcanized product, and a hose article, a sealing article and a rubber vibration insulator using the acrylic rubber composition. An acrylic rubber composition containing an acrylic rubber obtainable by copolymerizing 100 parts by mass of an alkyl acrylate with from 10 to 100 parts by mass of an alkyl methacrylate and from 0.5 to 4 parts by mass of a crosslinkable monomer. Here, the alkyl methacrylate is preferably at least one compound selected from the group consisting of methyl methacrylate, ethyl methacrylate and n-butyl methacrylate, and the alkyl acrylate is preferably at least one compound selected from the group consisting of methyl acrylate, ethyl acrylate and n-butyl acrylate.

Acrylic rubber

Growing community of inventors

Ichihara, Japan

Tsutomu Kobari