Styrenic resin incorporating recycled polystyrene
US8609778B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2012 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Aug 9, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides a styrenic resin incorporating post-consumer recycle polystyrene (PCR PS), and systems and methods for making the same. For example, a styrenic resin produced in accordance with present embodiments includes at least approximately 20 weight percent PCR PS, has a melt flow rate (MFR) of less than approximately 2.5 g/10 min per ASTM D-1238-10, and an Mz+1 molecular weight of at least 685,000. The styrenic resin is produced by a free-radical polymerization process performed on a feed having PCR PS dissolved in monovinylarene monomer. The feed is produced in such a way so as to remove contaminants commonly associated with PCR PS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.