Patents Assigned to Valcour Incorporated
  • Moldable silane-crosslinked polyolefin foam beads
    Patent number: 4702868
    Abstract: Moldable foam beads comprising a silane-crosslinked polyolefin foam are produced by mixing a composition comprising a silane-modified polyolefin (such as a silane-grafted polyethylene) and a silanol condensation catalyst in an extruder to produce a melt, then injecting a blowing agent into the melt at a rate effective to produce a desired foam density in the extrudate; extruding and cutting the melt to form foam beads; and exposing the foam beads to moisture to produce silane crosslinking of the polyolefin foam.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: October 27, 1987
    Assignee: Valcour Incorporated
    Inventors: Thomas M. Pontiff, Frederick H. Collins