Preparation method for fire retardant comprising phosphorus

• Main Authors: MU BO, ZHOU YINGPING, HU QING, ZHANG XIUJUN, YANG BAOPING, NI HENGJIAN, GUO JUNHONG, WANG WENHUA, GUO YONGLIANG, CUI JINFENG, BAO XUEMEI, JIANG ZIYAN
• Format: Patent
• Language: English
• Published: 03.02.2016
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; COMPOSITIONS BASED THEREON; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention relates to a preparation method for a fire retardant comprising phosphorus. A formula of the fire retardant comprises: 22.88%-27.34% of a 9, 10-dihydrogen-9-oxa-10-phosphaphenanthrene-10-oxide, 20.66%-24.68% of hydroxyethyl methacrylate, 51.42%-55.30% of toluene and 0%-1.17% of a polymerization inhibitor; The preparation method comprises the steps of: in a reactor, adding toluene and the 9, 10-dihydrogen-9-oxa-10-phosphaphenanthrene-10-oxide in a formula ratio; stirring and heating the mixture, completely dissolving the 9, 10-dihydrogen-9-oxa-10-phosphaphenanthrene-10-oxide at the temperature of 84 DEG C, then dropwise adding hydroxyethyl methacrylate and triethylamine in a formula ratio into the system, and starting heating the mixture to120 DEG C after dropwise adding till backflow happens; continuously carrying out reaction for 24h after the temperature is stable, when the system becomes opalescent and turbid, stopping reaction, cooling the mixture to 25 DEG C, and separating the mixture to obtain a lower viscous liquid; and after washing the mixture by toluene for many times, drying the mixture at a temperature of 120 DEG C for 48h, and taking out the opalescent crystal solid cooled to 25 DEG C.