Moldable silane-crosslinked polyolefin foam beads

Details Moldable silane-crosslinked polyolefin foam beads Moldable silane-crosslinked polyolefin foam beads

1987-02-24

1987-10-27

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 53, 264 54, 264142, 264235, 264DIG5, 264DIG18, 521 79, 521 81, 521 91, 521134, 521143, 521154, B29C 7100

Patent

active

047028688

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.

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