Carbamoyl-oxyalkyl-phosphinic acid derivatives

US4173601A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

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

Key dates

• Filing date: Jun 8, 1978
• Grant date: Nov 6, 1979
• Expiry date: Jun 8, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/3211
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Carbamoyl-oxyalkyl-phosphinic acid derivatives or mixtures thereof of the formula ##STR1## in which Z.sub.n is an n-valent, saturated C.sub.1 -C.sub.6 -hydrocarbon group, R.sub.1 is an optionally branched C.sub.1 -C.sub.6 -alkyl group, which group may be substituted by a halogen atom, or a phenyl group, R.sub.2 is an optionally branched C.sub.2 -C.sub.7 -alkylene group, a is zero to n-1 and n is an integer of from 1 to 4. These compounds can be prepared by reacting phosphonites of the formula II ##STR2## in the presence of radical-forming agents, with a carbamate of the formula III EQU CH.sub.2 .dbd.R.sub.3 --O--CO--NH.sub.2 III in which R.sub.3 is an optionally branched C.sub.2 -C.sub.7 -alkylene group and is identical with the radical R.sub.2 containing one hydrogen atom less. The compounds are used as flame-retardants for textiles.