Polypropylene composition with low surface energy

US8283418B2 · kind B2 · utility

Assignee

• Borealis Technology Oy · FI

Inventors

• Werner Posch · Oberhaching, DE
• Manfred Stadlbauer · Linz, AT
• Stefan Schiesser · Linz, AT

Key dates

• Filing date: Jan 18, 2008
• Grant date: Oct 9, 2012
• Expiry date: Apr 28, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2555/40
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polypropylene composition comprising a) an isotactic polypropylene (iPP) produced in the presence of a single-site catalyst and said isotactic polypropylene (iPP) has a mean isotactic block length between two structural chain defects, as a statistical average, greater than 70, and b) an atactic polypropylene (aPP) with an absorbance ratio of the absorption band at 998 cm−1 to the absorption band at 973 cm−1 [A998/A973] below 0.80 wherein the weight ratio of said atactic polypropylene to the sum of said atactic polypropylene and said isotactic polypropylene (aPP/(aPP+iPP)) is at least 0.50 wt.-%.