Mixtures of polypropylene and liquid saturated diorganopolysiloxanes

US4287108A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ulrich Grigo · New Martinsville, US
• Leo Morbitzer
• Klaus-Peter Arlt · Krefeld, DE
• Rudolf Binsack · Krefeld, DE
• Josef Merten · Korschenbroich, DE

Key dates

• Filing date: Feb 8, 1980
• Grant date: Sep 1, 1981
• Expiry date: Feb 8, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A homogeneous, thermoplastic mixture comprising (A) from 85 to 99.5% by weight of isotactic polypropylene; and (B) from 15 to 0.5% by weight of a liquid, saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 cSt at 20.degree. C. The elastic properties of moulded articles produced from the polypropylene/diorganopolysiloxane mixtures of the present invention are substantially improved by the addition of small quantities of diorganopolysiloxane while their dimensional stability under heat and their rigidity are largely preserved.