Process to produce an additived composition of polyethylene comprising post-consumer resin and caps or closures made from this composition
US12129369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2022 |
| Grant date | Oct 29, 2024 |
| Priority date | — |
| Expiry date | Apr 12, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The disclosure relates to a process to produce a composition of polyethylene comprising post-consumer resin for the production of caps and closures, comprising the steps of providing from 20 wt. % to 85 wt. % of a component A being one or more polyethylene post-consumer resins having a melt index ranging from 0.8 to 3.0 g/10 min, and a density ranging from 0.940 to 0.965 g/cm3: providing a component B being a polyethylene resin having a melt index (MI2) ranging from 0.5 to 3.5 g/10 min. and a density ranging from 0.940 to 0.965 g/cm3: providing one or more antioxidants: and blending the components and the one or more antioxidants to form a composition of polyethylene having a melt index ranging from 1.0 to 3.2 g/10 min; wherein the composition of polyethylene is having a z average molecular weight (Mz) of at most 390.000 g/mol as determined by gel permeation chromatography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.