Halogen-free flame-retardant co-polymerized polyamide 66 resin and preparation method thereof

Abstract

The invention discloses halogen-free flame-retardant co-polymerized polyamide 66 resin and a preparation method thereof. The preparation method is characterized in that phosphine oxide binary acid and conventional diamine are used for preparing organic ammonium phosphate which is used as a flame-retardant component to be co-polymerized with polyamide salt to prepare the halogen-free flame-retardant co-polymerized flame-retardant polyamide 66 resin. The halogen-free co-polymerized flame-retardant polyamide 66 resin is a milk-white non-crystallized glass-like polymer, a melting range is 260 to 270 DEG C, and the relative viscosity is 2.75 to 2.90; total phosphorus content of the halogen-free co-polymerized flame-retardant polyamide 66 resin material is 0.6 to 0.8 percent, the flame-retardant level is UL-94V-0 level, the tensile strength is greater than or equal to 80.0 MPa, and an elongation at break is 64.5 percent to 68.5 percent. The halogen-free flame-retardant co-polymerized polyamide 66 resin has characteristics of no halogen, flame retardance, high viscosity, no melting drop and high mechanical strength and can be widely applied to the field of fibers and spinning.

Description

technical field [0001] The invention belongs to polyamide and its preparation. It relates to a halogen-free flame-retardant copolymerized polyamide 66 resin and a preparation method thereof. The halogen-free flame-retardant copolymerized polyamide 66 resin of the present invention has the characteristics of halogen-free flame retardancy, high viscosity, no droplet and high mechanical strength, and can be widely used in the fields of fibers and textiles. Background technique [0002] At present, the halogen-free flame retardant of polyamide is mainly achieved through two ways: (1) using additive flame retardant in polyamide resin, that is, adding flame retardant to polyamide by mechanical blending method, so that It obtains flame retardancy; whether flame-retardant polyamide fibers or flame-retardant engineering plastics are prepared by this method, it has a certain impact on the application of flame-retardant polyamide resins. At present, the flame retardant modification o...

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Problems solved by technology

However, it does not solve the problem that the flame retardant in the polyamide 66 is decomposed due to high temperature during the polymerization and processing, which affects the flame retardancy and mechanical properties of the flame retardant polyamide 66.

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