Patents Represented by Law Firm Loruso & Loud
  • Foamed particles of cross-linked aliphatic polyester resins, process for producing them, and foamed moldings obtained from them
    Patent number: 6110983
    Abstract: Foamed and expanded beads of a crosslinked aliphatic polyester resin having a gel fraction of at least 5% by weight. The expanded beads may be obtained by crosslinking beads of a non-crosslinked aliphatic polyester resin with a crosslinking agent including an organic peroxide to obtain crosslinked resin beads having a gel fraction of at least 5% by weight, and then expanding the crosslinked resin beads. A biodegradable foamed article may be obtained by thermally foaming the crosslinked, expanded aliphatic polyester resin beads in a mold.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: August 29, 2000
    Assignee: JSP Corporation
    Inventors: Hisao Tokoro, Satoru Shioya, Mitsuru Shinohara