A HIGH-EFFICIENCY HALOGEN-FREE FLAME RETARDANT EPOXY RESIN FOR LIQUID MOLDING

Abstract

Abstract: The core of the flame retardant was a novel reactive phosphorus-silicone and the low viscosity liquid flame retardant improve the processing property of the system, synergistically intensifying the property of the flame retardant. Synthetically considering the influence of different components on the flame retardancy, thermal and mechnical properties of the resin system, a high-efficiency flame retardant epoxy resin with molding interval time for 1 hour at 60 ℃ is prepared, for which the tensile strength, flexural strength and impact toughness are 72.4 MPa, 105 MPa and 8.43 kJ·m^-2. The results reveal that V-0 level is reached during the UL-94 vertical combustion, the oxygen index (LOI) can be promoted up to 30.0 and the resin exhibits self-extinguish away from the fire. Composite materials of the resin immediately exhibit excellent mechanical properties, for which the tensile, flexural and shear strength are 459 MPa, 612 MPa and 52.4 MPa. The flame retardant and mechanical properties of the resin are comparable to the commercial halogen-free flame retardant prepregs.

Key words: fire extinguishing, reactive flame retardant, synergistic strengthening flame-retardant, liquid molding, composites

CLC Number:

TB332

NAN Xun, JIANG Wen-ge, ZHOU Yu, SHANG Cheng-yuan. A HIGH-EFFICIENCY HALOGEN-FREE FLAME RETARDANT EPOXY RESIN FOR LIQUID MOLDING[J]. Composites Science and Engineering, 2020, 0(7): 93-97.

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