Patent · US Active

Caps and closures

US8580895B2 · kind B2 · utility

9Cited by

3References

19Claims

0Family size

Assignee

Total Petrochemicals Research Feluy · BE

Inventors

Alain Standaert · Brussels, BE
Romain Luijkx · Chercq, BE
Martine Slawinski · Nivelles, BE
Aurélien Vantomme · Mignault, BE

Key dates

Filing date	Jul 12, 2010
Grant date	Nov 12, 2013
Priority date	—
Expiry date	Jul 12, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

This invention discloses caps and closures produced by injection molding with a bimodal high density polyethylene (HDPE) resin comprising a low molecular weight, high density polyethylene fraction substantially free of comonomer and a high molecular weight, low density polyethylene fraction, having a molecular weight distribution of at least 3.5, preferably greater than 4.0, prepared in two reactors connected in series in the presence of a metallocene-containing catalyst system, wherein the metallocene comprises a bisindenyl or a bis-tetrahydrogenated-indenyl component.

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