Polyester fiber and process for the production thereof

US5565522A · kind A · utility

Assignee

• AKZO NOBEL N.V. · NL

Inventors

• Bertram Böhringer · Erkrath, DE
• Diederich Schilo · Klingenberg, DE

Key dates

• Filing date: Sep 9, 1994
• Grant date: Oct 15, 1996
• Expiry date: Sep 9, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A fiber predominantly composed of polyethylene terephthalate as fiber polymer, which contains 0.1 to 5% by weight, based on the fiber polymer, of a polyalkyl methacrylate, imidated up to 50 to 90%, predominantly in the form of inclusions. Also provided is a process for the production of melt-spun fibers, essentially composed of polyethylene terephthalate, by melting the fiber polymer and subsequent melt spinning, characterized in that the fiber polymer receives an admixture of 0.1 to 5% by weight, based on the fiber polymer, of a polymer only partially soluble in this and essentially composed of imidated polyalkyl methacrylates which are imidated up to 50 to 90% by reaction of polyalkyl methacrylates, the ester group of which contains an alcohol having 1 to 6 C atoms, with a primary amine having 1 to 3 C atoms, and the acid and/or anhydride content of which is less than 0.25 milliequivalents per gram and, possibly, other additives prior to the melt spinning.