Synergistic flame retardant combination of salts of 1-hydroxy-dihydrophosphole oxides and/or 1-hydroxyphospholane oxides and nitrogen compounds for use in polymers

US6509401B1 · kind B1 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Elke Jenewein · Gersthofen, DE
• Bernd Nass · Augsburg, DE
• Wolfgang Wanzke · Meitingen, DE

Key dates

• Filing date: Aug 27, 1998
• Grant date: Jan 21, 2003
• Expiry date: Aug 27, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/5313
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a synergistic flame retardant combination for thermoplastic polymers which comprises as component A a salt of 1-hydroxydihydrophosphole oxides of the formula (Ia) or formula (Ib) and/or 1-hydroxyphospholane oxides of the formula (II) and as component B a nitrogen compound of the formula (III) to (VIII) or a mixture of the compounds designated by the formulae in which the substituents are as defined in the description.