公开(公告)号：US20170121501A1

公开(公告)日：2017-05-04

申请号：US14927528

申请日：2015-10-30

Applicant: FINA TECHNOLOGY, INC.

Inventor： Giovanni Trimino ,  Carlos DeAnda ,  David W. Knoeppel

IPC: C08K5/524 ,  C08K5/17 ,  C08K5/20 ,  C08K5/105 ,  C08K5/353 ,  C08K5/3492

CPC classification number: C08K5/524 ,  C08K5/105 ,  C08K5/17 ,  C08K5/20 ,  C08K5/3492 ,  C08K5/353 ,  C08L25/06 ,  C08L51/003 ,  C08L51/04

Abstract: High impact polystyrene may be formed with increased swell index and reduced or eliminated discoloration. A process of forming high impact polystyrene may include providing a polymerization system including a polymerization reactor and a devolatilizer. High impact polystyrene may be formed in the polymerization reactor, and sent to the devolatilizer. A polar antioxidant having a hindered phenol structure and an aliphatic amine group, and with a phosphite antioxidant may be added to the polymerization system. In another process, a chemical retarder and a fluorescent whitening agent may be added to the polymerization system. In another process, a chemical retarder that inhibits free radical rubber crosslinking may be added to the polymerization system.

公开(公告)号：US20130210948A1

公开(公告)日：2013-08-15

申请号：US13754036

申请日：2013-01-30

Applicant: FINA TECHNOLOGY, INC.

Inventor： Camille Grossetete ,  David W. Knoeppel ,  Jose M. Sosa ,  Shane Steagall ,  Carlos Corletto

IPC: C08L25/06

CPC classification number: C08L25/06 ,  C08L2205/02 ,  C08L2207/20

Abstract: A method of preparing a polystyrene blend that includes combining a first polystyrene composition having a first melt flow index with a second polystyrene composition having a second melt flow index and forming a polystyrene blend, the second melt flow index being at least 2 dg/min higher that the first melt flow index. The polystyrene blend has an observed tensile strength value greater than 3% above the expected tensile strength value. The second polystyrene composition can include a recycled polystyrene material, which can include expanded polystyrene. An alternate method of preparing the polystyrene blend includes combining a polystyrene composition with a styrene monomer to form a reaction mixture, polymerizing the reaction mixture and obtaining a polystyrene blend, where the polystyrene containing composition has a melt flow index at least 2 dg/min higher than the melt flow index of the styrene monomer after it has been polymerized.

Abstract translation: 一种制备聚苯乙烯共混物的方法，其包括将具有第一熔体流动指数的第一聚苯乙烯组合物与具有第二熔体流动指数的第二聚苯乙烯组合物组合并形成聚苯乙烯共混物，所述第二熔体流动指数至少为2dg / min 第一个熔体流动指数。 聚苯乙烯共混物的观测拉伸强度值大于预期拉伸强度值的3％以上。 第二聚苯乙烯组合物可以包括再循环的聚苯乙烯材料，其可以包括发泡聚苯乙烯。 制备聚苯乙烯共混物的替代方法包括将聚苯乙烯组合物与苯乙烯单体组合以形成反应混合物，使反应混合物聚合并获得聚苯乙烯共混物，其中含聚苯乙烯的组合物的熔体流动指数至少为2dg / min 比苯乙烯单体聚合后的熔体流动指数高。