Process of recycled polypropylene
AssigneeNexam Chemical AB
InventorUrban Andreasson
Life of this patent
Estimating the term…
Abstract
Improve properties of recycled post-consumer and/or post-industrial polypropylene by adding ethylene copolymer (B) comprising hydrolysable silicon-containing groups.
Claims13
A process of recycling a polypropylene composition, wherein the recycled polypropylene composition comprises:
- a) at least 50 weight % of recycled polypropylene, and
- b) 0.5 to 15 weight % of an ethylene copolymer comprising hydrolysable silicon-containing groups,
- compounding said recycled polypropylene composition,
- wherein the recycled polypropylene composition treated by 0.5 to 15 weight % of an ethylene copolymer comprising hydrolysable silicon-containing groups has at least 15% lower MFR2 compared to the recycled polypropylene.
A recycled polypropylene composition, wherein the recycled polypropylene composition comprises:
- a) at least 50 weight % of recycled polypropylene, and
- b) 0.5 to 15 weight % of an ethylene copolymer comprising hydrolysable silicon-containing groups
- wherein said recycled polypropylene composition has been compounded, the polypropylene composition after the compounding having a MFR2 of 0.5 to 5 g/10 min.
A process of modifying the MFR2 of a recycled polypropylene, said process comprising the step of using an ethylene copolymer comprising hydrolysable silicon-containing groups as an MFR2 modifier to provide a recycled polypropylene composition by compounding the recycled polypropylene with the ethylene copolymer comprising hydrolysable silicon-containing groups, wherein the recycled polypropylene composition comprises:
- A) at least 50 weight % of the recycled polypropylene, and
- b) 0.5 to 15 weight % of the ethylene copolymer comprising hydrolysable silicon-containing groups.
Dependencies are inferred from the claim text.