Polyester composition and molded articles, preferably a film, produced therefrom

US4568616A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Walter Seifried · Wiesbaden, DE
• Dieter Engel · Kelsterbach, DE
• Werner Denneler · Plochingen, DE

Key dates

• Filing date: Apr 13, 1984
• Grant date: Feb 4, 1986
• Expiry date: Apr 13, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention pertains to a polyester composition containing finely divided polymer particles in a substantially homodisperse distribution. The polymer particles are prepared in an emulsion-polymerization process and are crosslinked. The polymer particles exhibit an extremely narrow grain-size distribution and are incorporated into the polyester during the synthesis thereof. The invention also relates to films, particularly stretched films, which are produced from the polyester composition and which can also be used as base films for the production of composite films. It is additionally also possible to produce filaments and fibers from the composition according to the invention or with the addition of this composition to other polymers. The films are preferably used as bases for magnetic recording elements or for capacitors, and fiber or filaments are employed in the production of tire cord.