Flameproofed modacryl copolymers, fibers and filaments containing carboxy phosphinic acid derivatives having improved thermostability

US4052551A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Bernd Huber · Schorndorf, DE
• Hans-Jerg Kleiner · Kronberg, DE
• Hubert Neumaier

Key dates

• Filing date: Oct 17, 1975
• Grant date: Oct 4, 1977
• Expiry date: Oct 17, 1995

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F6/40
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to filaments and fibers the filament-forming substance of which is a copolymer of from 35 to 85 weight % of acrylonitrile, from 5 to 45 weight % of vinyl chloride, vinyl bromide and/or vinylidene chloride, from 5 to 30 weight % of carboxyphosphinic acid derivatives of the formula ##STR1## where R.sub.1 is lower alkyl having up to 8 carbon atoms, or CH.sub.2 Cl--, R.sub.2 is lower alkyl having up to 8 carbon atoms in which a hydrogen atom may be substituted by a halogen atom in case of R.sub.1 being CH.sub.2 Cl--, and R.sub.3 is hydrogen or methyl, and from 0 to 15 weight % of other unsaturated compounds having an activated double bond; the weight percentages being relative to the total amount of monomers, and a process for their manufacture. The filaments obtained are self-extinguishing and excel furthermore by their thermostability and their high degree of whiteness.