公开(公告)号：US20210324128A1

公开(公告)日：2021-10-21

申请号：US17231242

申请日：2021-04-15

Applicant: FINA TECHNOLOGY, INC.

Inventor： Carlos de Anda ,  Giovanni Trimino ,  Bradley Stiles ,  Jose Sosa

IPC: C08F279/02

Abstract: A process for producing high impact polystyrene comprising introducing to a reactor a partially-polymerized mixture comprising at least one vinyl aromatic monomer, an elastomer and reacted vinyl aromatic monomer wherein the partially-polymerized mixture has not undergone phase inversion; polymerizing the partially-polymerized mixture in the reactor to the phase inversion point to form a phase-inverted mixture; recovering a portion of the phase-inverted mixture from the reactor wherein the phase-inverted mixture comprises high impact polystyrene; and introducing another portion of the phase-inverted mixture to another reactor.

公开(公告)号：US20240002570A1

公开(公告)日：2024-01-04

申请号：US18470260

申请日：2023-09-19

Applicant: Fina Technology, Inc.

Inventor： Carlos de Anda ,  Giovanni Trimino ,  Bradley Stiles ,  Jose Sosa

IPC: C08F279/02

CPC classification number: C08F279/02

Abstract: A high impact polystyrene reactor system includes a first continuously stirred tank reactor. The first continuously stirred tank reactor includes an inlet configured to receive (i) at least one vinyl aromatic monomer, (ii) an elastomer, and (iii) a free radical initiator; and an outlet configured to convey a first reactor effluent. In addition, the high impact polystyrene reactor system includes a second continuously stirred tank reactor. The second continuously stirred tank reactor includes an inlet in fluid communication with the first continuously stirred tank reactor outlet and configured to receive (i) a portion of the first reactor effluent from the first continuously stirred tank reactor, (ii) at least one vinyl aromatic monomer, (iii) an elastomer, and (iv) a free radical initiator; and an outlet configured to convey a portion of a second reactor effluent comprising high impact polystyrene. Further, the high impact polystyrene reactor system includes a conduit for establishing a recirculation stream between the second reactor and the first reactor. The recirculation stream comprises another portion of the second reactor effluent.

公开(公告)号：US11795259B2

公开(公告)日：2023-10-24

申请号：US17231242

申请日：2021-04-15

Applicant: FINA TECHNOLOGY, INC.

Inventor： Carlos de Anda ,  Giovanni Trimino ,  Bradley Stiles ,  Jose Sosa

IPC: C08F279/02

CPC classification number: C08F279/02

Abstract: A process for producing high impact polystyrene comprising introducing to a reactor a partially-polymerized mixture comprising at least one vinyl aromatic monomer, an elastomer and reacted vinyl aromatic monomer wherein the partially-polymerized mixture has not undergone phase inversion; polymerizing the partially-polymerized mixture in the reactor to the phase inversion point to form a phase-inverted mixture; recovering a portion of the phase-inverted mixture from the reactor wherein the phase-inverted mixture comprises high impact polystyrene; and introducing another portion of the phase-inverted mixture to another reactor.