Polyphosphorus compounds obtained by reacting an alcohol, phosphorus anhydride and an oxalkylating agent

US4244893A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Walter Dursch · Königstein, DE
• Hans-Jerg Kleiner · Kronberg, DE
• Fritz Linke · Königstein, DE

Key dates

• Filing date: Jun 6, 1978
• Grant date: Jan 13, 1981
• Expiry date: Jun 6, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/53
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Mixtures of oligomeric phosphorus compounds which are obtained in the first step by reaction of a mono- to hexavalent alcohol with phosphinic, phosphonic and phosphoric acid derivatives containing at least one anhydride oxygen and possibly containing terminal acid P-OH radicals and by subsequent reaction in the second step with alkylene oxides or alkylene carbonates. These phosphorus compounds which contain hydroxyalkylphosphonic acid groups, may be suitably employed directly as flame-retardant finishes for textile articles or as intermediates thereof.