Hydroxyl-containing poly(alkylene phosphates)

US9969845B2 · kind B2 · utility

Assignee

• LANXESS Deutschland GmbH · DE

Inventors

• Jan-Gerd Hansel · Bensberg, DE
• Heiko Tebbe · Dormagen, DE
• Michael Wittpahl · Nettetal, DE

Key dates

• Filing date: Jan 6, 2016
• Grant date: May 15, 2018
• Expiry date: Jan 6, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Flame retardant compositions for polyurethanes may include hydroxyl-containing poly(alkylene phosphates) that have 5 mol % or less of phosphorus from phosphorus-containing compounds having a 31P NMR resonance signal at a chemical shift in the range from 13 ppm to 18 ppm relative to 85 wt % phosphoric acid.