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    • 5. 发明申请
    • FLAME-RETARDANT COMPOSITE MATERIAL
    • WO2021122202A1
    • 2021-06-24
    • PCT/EP2020/085223
    • 2020-12-09
    • RHODIA OPERATIONS
    • KIM, Han-SeongLEE, Hyun-CheolHOUGH, Lawrence, AlanWOODWARD, GaryDOSSITER, CraigMETIVIER, Pascal
    • D06M13/285D06M15/431H01M50/411H01M50/4295H01M50/44
    • A B S T R A C T FLAME-RETARDANT COMPOSITE MATERIAL The present invention relates to a process for manufacturing a composite material, comprising the steps of a) spraying an aqueous solution of a tetrakis(hydroxyorgano) phosphonium (THP) salt, an organic nitrogen compound and optionally an aliphatic amine having at least one alkyl group having at least 12 carbon atoms onto a i) porous substrate; b) drying the substrate; c) curing the substrate with ammonia; d) oxidizing the substrate; e) treating the substrate with a metalbisulfite salt; and f) washing the substrate with excessive water, wherein, said step a) is implemented at a speed of 3.0 ml/sec or less of the aqeuous solution, preferably 2.0 ml/sec or less of the aqeuous solution and also to a composite material produced by the process. The present invention also relates to a composite material comprising i) a porous substrate and ii) a reaction product of a THP salt, an organic nitrogen compound, and optionally an aliphatic amine having at least one alkyl group having at least 12 carbon atoms, wherein the ii) reaction product is impregnated into the pores of the i) porous substrate; to an electrochemical device comprising the composite material as a separator, and to the use of the composite material as a separator in an electrochemical device, in particular a Li-ion secondary battery, a lead-acid battery, or a supercapacitor for improving safety performance. Figure 2