Depolymerisiertes Lignin, das mit Phosphor und Stickstoff Modifiziert Ist, als Flammschutzmittelzusatz und Verwandte Verfahren

Details

Veröffentlichungs-Nr.

EP4818231

Anmeldetag

31. März 2025

Veröffentlichung

7. Oktober 2026

Rechtsraum

EP

Abstract

The invention relates to a method for preparing a phosphorous and nitrogen modified depolymerized lignin. This method involves providing a depolymerized lignin and treating it with a phosphorylation agent and an amine reagent to enhance its thermal stability compared to polymerized lignin. The depolymerized lignin is characterized by specific molecular weight ranges and polydispersity index. The modified lignin contains specific percentages of phosphorous and nitrogen and can be used as a flame retardant additive in blends with polymers having higher melting points. The phosphorylation agent and amine reagent are selected from specific groups, and the depolymerized lignin is obtained through reductive catalytic depolymerization, which can be performed in batch or continuous fashion using specific conditions and catalysts.

Anmelder

Firma

VITO NV

Land

🇧🇪 Belgien