Halogen-free flame retardant polyamide 6 composition

Abstract

The invention discloses a halogen-free flame-retardant polyamide 6 composition with high toughness and antistatic property. The composition comprises active magnesium hydrate, organic phosphate oligomer, zinc oxide crystal whisker, a macromolecular compatilizer, a plasticizer and an additive. The active magnesium hydrate and the organic phosphate oligomer are used to improve flame retardance; organic anlistatig and the zinc oxide crystal whisker are used to improve the antistatic property; and the macromolecular compatilizer is used to improve interaction among polyamide, the inorganic magnesium hydrate and the zinc oxide crystal whisker. The flame-retardant polyamide 6 composition has the advantages that compared with a sole magnesium hydrate flame-retardant polyamide 6, the use amount of the magnesium hydrate is reduced to below 50 mass percent; the impact strength of a gap is increased by over 80 percent; the breaking elongation rate is improved by approximately 20 times; the resistivity is reduced by 4 orders of magnitude; the flame retardant performance reaches UL94V-0 level; simultaneously, the toughness is basically maintained at the level of pure polyamide 6; the temperature for thermal deformation is much higher than 65 DEG C of the pure polyamide 6; and the molding shrinkage rate is reduced to 0.6 percent from 1.78 percent of the pure polyamide 6.

Description

technical field [0001] A halogen-free flame-retardant polyamide 6 composition with high toughness and antistatic properties belongs to the field of flame-retardant polyamides, and in particular relates to a halogen-free flame-retardant polyamide composition. Background technique [0002] Polyamide 6 (PA6, Nylon 6) has excellent processability, weather resistance, chemical stability and electrical properties. Polyamide 6 is increasingly used in live working environments such as automotive appliances and power tools. However, the flame resistance of polyamide resin is poor. The oxygen index of polyamide 6 is 24-28, which can be self-extinguished. The flame retardant grade is UL94V-2, which is still combustible, and the risk of fire is extremely high. In terms of flame retardant modification of polyamide resins, halogens, antimony trioxide systems, phosphorus systems and inorganic hydroxides are generally used as flame retardants. [0003] However, dense smoke and harmful subs...

AI Technical Summary

Problems solved by technology

[0009] The invention proposes a halogen-free flame-retardant polyamide 6 composition with high toughness and antistatic properties, aiming to solve the problems of reduced toughness and large dosage in the technical field of flame-retardant polyamide 6 with inorganic metal magnesium hydroxide, and The flame retardant system meets the requirements of antistatic properties in the application, and provides a halogen-free flame retardant polyamide 6 composition with high toughness and antistatic properties on the basis of maintaining excellent rigidity and heat resistance