Patent · US Active

Polymerization process for preparing polyolefin blends

US7985799B2 · kind B2 · utility

24Cited by
35References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 8, 2006
Grant dateJul 26, 2011
Priority date—
Expiry dateNov 25, 2026

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08L2308/00
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A process for preparing polyolefin blends comprising:a) polymerizing in a solution phase propylene or 1-butene to prepare a polymeric solution containing a semicrystalline polymer component;b) polymerizing in a solution phase 1-hexene or 1-octene to prepare a polymeric solution containing an amorphous polymer component;c) mixing the polymeric solutions obtained from steps a) and b);d) subjecting the mixture of step c) to a devolatilization step to separate a polyolefin blend comprising a semicrystalline component and an amorphous component;the polymerization steps a) and b) being carried out in two polymerization reactors connected in parallel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.