Low-cost high-flame-retardant reinforced polyamide and preparation method for same

Abstract

The invention discloses a low-cost high-flame-retardant reinforced polyamide and a preparation method for the same. Components of the low-cost high-flame-retardant reinforced polyamide comprise, in weight percentage (%), 40-60% of nylon resin, 10-25% of main flame retardant, 1-15% of stannate composite flame retardant and superfine silicon-magnesium acid salt synergistic flame retardant, 10-40% of glass fibers, 0-4% of toughening solubilizer, 0.2-0.4% of antioxidant, 0.4-0.8% of lubricant and 0.2-0.4% of nucleating agent. The preparation method includes the steps: premixing according to the proportion of the formula, then extruding the mixture by a double-screw extruder according to designated process, granulating, cooling and drying so that the flame-retardant reinforced polyamide is prepared. The flame-retardant polyamide is high in strength, capable of achieving UL94V0 flame retardance, high in glow wire and particularly low in cost and high in transparency, and the surface of the polyamide is good to be easy in forming processing.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a low-cost high flame-retardant reinforced polyamide and a preparation method thereof. The raw materials of the high flame-resistant reinforced polyamide product do not contain antimony-based flame retardants such as antimony trioxide. Background technique [0002] With the rapid development of domestic electronics, electrical, communication, and home appliance industries, the demand for polyamide (PA, commonly known as nylon) is increasing. Commonly used ones such as PA66 and PA6 have an oxygen index of 24.3% and 26.4% respectively, which poses a fire hazard. Therefore, when PA is used in electrical-related products, flame-retardant modification is required. Among them, environmentally friendly bromine and antimony-based flame-retardant reinforced polyamides are the most widely used. Chinese Patent No. 200480012577 discloses a flame-retardant polyamide composition. In this compo...

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Problems solved by technology

The invention further points out that antimony synergists are oxides of antimony such as antimony trioxide, antimony tetroxide, and antimony pentoxide. At present, because the halogen-containing flame retardants used as flame retardants can produce toxic gas hydrogen halides when burned , Therefore, the industry is improving the halogen-containing flame retardant of the main flame retardant, and has introduced a lot of halogen-free flame-retardant nylon products. The applicant has also achieved great success in this regard, but as a flame-retardant Antimony-containing synergists for additives have always been used in the industry. However, in recent years, antimony resources have been in short supply, and the price of antimony trioxide, a flame-retardant synergist, has risen. It has always been a problem to reduce the cost of such flame-retardant materials.

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