Phosphorus-nitrogen synergistic flame retardant containing flexible nitrile group as well as preparation method and application of phosphorus-nitrogen synergistic flame retardant

• Main Authors: ZHOU YUMEI, CAI YUMING, ZHENG PENGLUN, SHI KAIKAI, ZHANG ZEBIN, LI JUNWEI
• Format: Patent
• Language: Chinese; English
• Published: 29.08.2023
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses a phosphorus-nitrogen synergistic flame retardant containing flexible nitrile groups and a preparation method thereof. The preparation method comprises the following steps: mixing hexamethylenediamine and vanillin, adding the mixture into an organic solvent, and heating, refluxing and stirring until the mixture is completely dissolved; heating the solution, and carrying out reflux reaction; after the reaction is finished, carrying out vacuum filtration on the reaction solution, washing with water, and drying to obtain a powdery precursor; mixing the precursor and 4-nitrophthalonitrile, adding the mixture into an organic solvent, and carrying out reflux stirring under a heating condition until the mixture is completely dissolved; then adding a catalyst, heating and carrying out reflux reaction again; adding DOPO and supplementing the solvent, and continuing the reflux reaction; and after the reaction is finished, washing a reaction product with water and ethanol, and then filtering and