公开(公告)号：US09481740B2

公开(公告)日：2016-11-01

申请号：US14639323

申请日：2015-03-05

Applicant: FINA TECHNOLOGY, INC.

Inventor： Likuo Sun ,  Jose Sosa ,  Serge Eon ,  Carlos Corleto ,  Scott Cooper

IPC: C08F2/00 ,  C08F279/02 ,  C08F212/08 ,  C08L9/06

CPC classification number: C08F2/001 ,  C08F212/08 ,  C08F279/02 ,  C08L9/06 ,  C08L2555/84

Abstract: A process for producing high impact polystyrene including feeding at least one vinyl aromatic monomer, an elastomer, and a free radical initiator to a first linear flow reactor to form a reaction mixture. Polymerizing the reaction mixture in the first linear flow reactor to a point below the point at which phase inversion occurs to produce a first polymerization mixture and feeding the first polymerization mixture from the first linear flow reactor to a second linear flow reactor. Polymerizing the reaction mixture in the second linear flow reactor to at least a phase inversion point of the mixture to produce a second polymerization mixture and feeding the second polymerization mixture from the second linear flow reactor to at least a third linear flow reactor for post-inversion polymerization of the second polymerization mixture. The product stream can have an ESCR value of at least 10% toughness retained with less than 10 wt % rubber content.