Halogen free flame retardant nylon 6 composite with high CTI value and preparation method thereof

A flame-retardant nylon and composite technology, applied in the field of modified nylon and polymer materials, can solve the problems of unpublished nylon 6 flame-retardant materials such as CTI value, and achieve good mechanical properties, excellent flame-retardant properties, and convenient processing.

Inactive Publication Date: 2010-08-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame retardant masterbatch is composed of melamine cyanurate, titanate coupling agent, resin, organic silica gel and potassium carbonate, which can effectively improve the flame retardant performance of nylon 6 and solve the problem of dripping when nylon 6 flame retardant materials burn. However, the CTI value of nylon 6 flame retardant materials has not been published

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take nylon 6 resin, flame retardant, flame retardant synergistic inorganic filler, toughening agent, compatibilizer, reinforcing inorganic filler and antioxidant, and blend all raw materials according to the following composition and mass percentage:

[0024] Nylon 6 resin 68.8

[0025] Melamine cyanurate 10

[0026] Zinc borate 7

[0027] "Core-shell" structure MBS 8

[0028] Bisphenol A solid epoxy resin 1

[0029] Organic Montmorillonite 5

[0030]Antioxidant 1010 0.1

[0031] Antioxidant 168 0.1

[0032] Put all the above-mentioned raw materials into the mixer and mix them evenly, and then put them into the twin-screw extruder for melt blending and extrusion. ℃, 234°C, 235°C, 235°C, 233°C, 230°C, 230°C, 230°C, screw speed: 160-180 rpm, after extrusion, the material is water-cooled, pelletized and sieved. Then, the obtained pellets were fully dried in a vacuum oven at 80° C., and injected into standard test specimens on an injection molding machine. The mecha...

Embodiment 2

[0034] Take nylon 6 resin, flame retardant, flame retardant synergistic inorganic filler, toughening agent, compatibilizer, reinforcing inorganic filler and antioxidant, and blend all raw materials according to the following composition and mass percentage:

[0035] Nylon 6 resin 48.5

[0036] Melamine cyanurate 10

[0037] Magnesium hydroxide 12

[0038] Zinc borate 7

[0039] "Core-shell" structure MBS 12

[0040] Bisphenol A type solid epoxy resin 2

[0041] Wollastonite 8

[0042] Antioxidant 1010 0.25

[0043] Antioxidant 168 0.25

[0044] Put all the above-mentioned raw materials into the mixer and mix them evenly, and then put them into the twin-screw extruder for melt blending and extrusion. ℃, 234°C, 235°C, 235°C, 233°C, 230°C, 230°C, 230°C, screw speed: 160-180 rpm, after extrusion, the material is water-cooled, pelletized and sieved. Then, the obtained pellets were fully dried in a vacuum oven at 80° C., and injected into standard test specimens on an inject...

Embodiment 3

[0046] Take nylon 6 resin, flame retardant, flame retardant synergistic inorganic filler, toughening agent, compatibilizer, reinforcing inorganic filler and antioxidant, and blend all raw materials according to the following composition and mass percentage:

[0047] Nylon 6 resin 53.5

[0048] Melamine polyphosphate 10

[0049] Magnesium hydroxide 12

[0050] Zinc oxide 5

[0051] "Core-shell" structure MBS 12

[0052] Bisphenol A type solid epoxy resin 2

[0053] Organic Montmorillonite 5

[0054] Antioxidant 1010 0.25

[0055] Antioxidant 168 0.25

[0056] Put all the above-mentioned raw materials into the mixer and mix them evenly, and then put them into the twin-screw extruder for melt blending and extrusion. ℃, 234°C, 235°C, 235°C, 233°C, 230°C, 230°C, 230°C, screw speed: 160-180 rpm, after extrusion, the material is water-cooled, pelletized and sieved. Then, the obtained pellets were fully dried in a vacuum oven at 80° C., and injected into standard test specimen...

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Abstract

The invention discloses a halogen free flame retardant nylon 6 composite with high CTI value and a preparation method thereof. The composite comprises the following components by mass percent: 643.5-68.8wt.% of nylon, 10-12wt.% of fire retardant, 7-19wt.% of fire retardant synergetic inorganic packing, 8-12% wt.% of toughening agent, 1-3wt.% of bulking agent, 5-10% wt.% of enhance inorganic filler and 0.2-0.5wt.% of anti-oxygen which are prepared into the compound by a high speed premixing dispersing primary extrusion processing. The disclosed composite has as high as 550V CTI value and UL 94V-0 level excellent fire resistance; simultaneously, the polymer has good mechanical property by a comprehensive modified technique, wherein the tensile strength reaches 70.5Mpa, the bending strength reaches 90.7MPa and the impacting strength of a gap reaches 28.1kJ/m2. The invention solves the problem that the flaming resistant and high CTI value are difficult to satisfy simultaneously; the inventive 6 nylon compound is very suitable for preparing a low-pressure vacuum contactor, a transformer coil framework, a high-temperature resistant relay, a breaker, a high voltage electrical apparatus, a handle and a thin wall electronic and electrical appliance elements, and the like.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant nylon 6 compound with a high comparative tracking index (CTI) value, which is suitable for manufacturing low-voltage vacuum contactors, transformer coil skeletons, high-temperature-resistant relays, and circuit breakers. Devices, high-voltage electrical switches, handles, thin-walled electronic and electrical components, etc., belong to the technical field of modified nylon. Background technique [0002] Nylon is a common name for polyamide, which is a high molecular polymer containing amide groups (-NHCO-) ​​in the main chain of the molecule. Since it was launched in 1939 by Du Pont of the United States, it has developed into the engineering plastics with the most varieties and applications in the world, and its total output ranks first in the world of engineering plastics. The main varieties are: nylon 6, nylon 66, nylon 610, nylon 12, nylon 1010...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L51/04C08L63/02C08K13/06C08K9/04C08K3/34C08K5/3492C08K3/38C08K3/22C08K5/52C08K5/5313C08K3/32B29C47/92
Inventor 汪晓东孙双月武德珍
Owner BEIJING UNIV OF CHEM TECH
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