Patent Number: 6,166,099

Title: Tetrafunctional initiator

Abstract: The melt of polyvinyl aromatic polymers comprising from 10 to 45 weight % of star branched polymer prepared using a combination of thermal and tetra functional peroxide initiation has an improved melt strength permitting better foam formation for extrusion foam blown with conventional blowing agents and inert gases including CO.sub.2.

Inventors: Krupinski; Steven M. (Pittsburgh, PA)

Assignee: Nova Chemicals Inc

International Classification: C08J 9/14 (20060101); C08J 9/00 (20060101); C08J 009/00 ()

Expiration Date: 12/26/2017