Halogen-free flame retardant polyamide 6 composition

A flame-retardant polyamide, antistatic technology, applied in the field of flame-retardant polyamide, can solve the problems of decreased toughness, large dosage, etc., and achieve the effect of improving antistatic performance

Active Publication Date: 2009-05-06
GUANGDONG XINHUI MEIDA NYLON
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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 hyd

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] In parts by mass, 41 parts of polyamide 6, 45 parts of FM70 activated by KH550, 5 parts of zinc oxide whiskers pretreated by KH550 wet method, 5 parts of RDP, 3 parts of HDPE-MAH, 0.4 parts of EBS organic antistatic Agent, 0.3 parts of magnesium stearate, 0.3 parts of light stabilizer GW-540 are dispersed and mixed in proportion, melted, kneaded, extruded, cooled, pelletized and dried by a twin-screw extruder. The type of twin-screw extruder used is SJSH-Z-30 (Nanjing Rubber and Plastic Machinery Factory) equipped with LQ-50 cold cutting machine. The temperature of each partition of the screw barrel is: the first zone: 210 ° C, the second zone: 235 ℃, the third zone: 240℃, the fourth zone: 235℃, the fifth zone: 235℃, the sixth zone: 225℃, the seventh zone: 225℃, the eighth zone: 225℃, the machine head: 215℃, Host speed: 100r / min. The prepared composition is injection-molded into a standard sample for testing according to a standard size, and the physical properties are...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K13/06C08K9/04C08K5/523C08K5/20C08K5/42C08L51/06
Inventor 梁广义毛新华刘述梅李伟聪赵建青
Owner GUANGDONG XINHUI MEIDA NYLON
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