Alkyl-1-alkoxyethylphosphinous acid aluminum salts

US6229044A · kind A · utility

Assignee

• Ticona GmbH Deutschland KG · DE

Inventors

• Hans-Jerg Kleiner · Kronberg, DE
• Elke Jenewein · Gersthofen, DE
• Wolfgang Wanzke · Meitingen, DE

Key dates

• Filing date: Nov 17, 1999
• Grant date: May 8, 2001
• Expiry date: Nov 17, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/301
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aluminum salts of alky-(1-alkoxyethyl)phosphinic acids are prepared by reacting alky-(1-alkoxyethyl)phospihnic acids with aluminum hydroxide in a molar ratio of 3:1. The resulting aluminum phosphinates are used as flame retardants in thermoplastics, particularly in polyesters.