Flame resistant synthetic linear polyesters and shaped structures made thereof

US4035343A · kind A · utility

Assignee

• Farbwerke Hoechst Aktiengesellschaft vormals Meister Lucius & Bruning

Inventors

• Ulrich Bollert · Diedenbergen, DE
• Hans-Jerg Kleiner · Kronberg, DE
• Franz Jakob · Unterhaching, DE

Key dates

• Filing date: Aug 23, 1973
• Grant date: Jul 12, 1977
• Expiry date: Aug 23, 1993

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S260/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Permanently flame-resistant synthetic linear polyesters are obtained by irporating by condensation into the polyester composed of the usual dicarboxylic acid and diol units an alkylphosphine oxide of the formula ##SPC1## Wherein the radicals R to R.sub.4 represent organic radicals of which R.sub.2, R.sub.3 and Z may be substituted by 2 hydroxyl groups altogether, R.sub.2, R.sub.3 and R.sub.4 may also represent hydrogen and a is zero or a whole number of from 1 to 4. The flame-resistant polyesters are processed into shaped structures such as fibers, filaments, sheets, injection and compression molded articles characterized by good flameproofness and dyeing properties.