Process for producing monovinylaromatic polymer incorporating post-consumer recycled polystyrene, monovinylaromatic polymer incorporating post-consumer recycled polystyrene and articles produced thereof

US11124638B2 · kind B2 · utility

Assignee

• TOTAL RESEARCH & TECHNOLOGY FELUY · BE

Inventors

• Jose-Maria Pere · Barcelona, ES
• Antonio Guinovart · Barcelona, ES
• Armelle Sigwald · Nivelles, BE
• Laetitia Urbanczyk · Couvin, BE
• Martine Slawinski · Nivelles, BE
• Pascal Charlier · Evere, BE
• Elodie Perche · Brussels, BE
• Serge Eon · Waterloo, BE
• Thierry Marcoux · Casteau, BE
• Matthieu Adam-Berret · Thiméon, BE

Key dates

• Filing date: Feb 28, 2018
• Grant date: Sep 21, 2021
• Expiry date: Mar 20, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process and an installation to produce a monovinylaromatic polymer (3) comprising post-consumer recycled polystyrene (PCR-PS) wherein the process comprises the steps of mixing the PCR-PS (5) and the monovinylaromatic monomer (7) within a dissolver (9) to dissolve the PCR-PS (5) in the monovinylaromatic monomer (7) so as to produce a polymerization mixture (13); and a step of filtering the polymerization mixture (13) that includes continuously redirecting at least a part of the stream of the filtered polymerization mixture (17) back to the dissolver (9) and mixing it with the polymerization mixture (13) so as to continuously reduce the content of insoluble material in the polymerization mixture (13) contained in the dissolver (9).