公开(公告)号：US10550245B2

公开(公告)日：2020-02-04

申请号：US15724705

申请日：2017-10-04

Applicant: Fina Technology, Inc.

Inventor： Giovanni Trimino ,  Carlos DeAnda ,  David W Knoeppel

IPC: C08K5/524 ,  C08L25/06 ,  C08L51/00 ,  C08L51/04 ,  C08K5/105 ,  C08K5/17 ,  C08K5/20 ,  C08K5/3492 ,  C08K5/353

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：US20180215889A1

公开(公告)日：2018-08-02

申请号：US15883439

申请日：2018-01-30

Applicant: FINA TECHNOLOGY, INC.

Inventor： Wei Wang ,  David W Knoeppel ,  Melissa Greenberg

IPC: C08J9/12 ,  C08J9/00 ,  C08J9/14 ,  C08F212/08

CPC classification number: C08J9/122 ,  C08F212/08 ,  C08J9/0023 ,  C08J9/12 ,  C08J9/142 ,  C08J2203/06 ,  C08J2203/10 ,  C08J2203/12 ,  C08J2325/08 ,  C08J2351/00 ,  C08F2220/281 ,  C08F222/08 ,  C08F2220/1825 ,  C08F2220/325

Abstract: A method of making a foamable polystyrene composition includes combining a styrenic monomer and a co-monomer containing a polar functional group to obtain a mixture, subjecting the mixture to polymerization to obtain a styrenic co-polymer, and combining the styrenic co-polymer with a blowing agent in a foaming process to obtain foamed articles.