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A kind of low warpage high thermal conductivity flame retardant composite material and its preparation method

A flame-retardant composite material with high heat resistance technology, applied in the field of engineering plastics, can solve problems such as heat resistance and flame retardancy, and achieve the effects of improving heat resistance, dimensional stability, and good electrical conductivity

Active Publication Date: 2018-02-27
古道尔工程塑胶(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now there are more and more types of conductive materials. When conductive materials are used in electrical appliances, heat resistance and flame retardancy are difficult problems. However, there are few materials that are flame retardant and conductive in the market, so it is necessary to develop a material to solve the above problems.

Method used

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  • A kind of low warpage high thermal conductivity flame retardant composite material and its preparation method
  • A kind of low warpage high thermal conductivity flame retardant composite material and its preparation method
  • A kind of low warpage high thermal conductivity flame retardant composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In parts by weight, premix 50 parts of dried PA6 resin, 3.0 parts of toughening agent and 0.4 parts of coupling agent in a high-speed mixer for 4 minutes, then add 35 parts of metal conductive powder, 3 parts of flame retardant Additive, 9 parts of synergistic flame retardant and 0.4 parts of antioxidant continue to stir for 8 minutes; the stirred mixture is placed in the feed section of the twin-screw extruder, and then passes through the first section to the ninth section of the twin-screw extruder Extrude from the die after blending and melting, the temperature of the first to ninth section of the twin-screw extruder is: 160°C-180°C, 220°C-240°C, 220°C-240°C, 220°C-240°C , 220°C-240°C, 210°C-230°C, 210°C-230°C, 200°C-230°C, 200°C-230°C; the die head temperature of the twin-screw extruder is 230°C-270°C. The main engine speed of the twin-screw machine is 300-500r / min; the feeding frequency is 8-15Hz.

Embodiment 2

[0022] In parts by weight, pre-mix 50 parts of dried PA6 resin with a melting point of 225-230°C and an intrinsic viscosity of 2.4-2.7dl / g, 3.0 parts of toughening agent and 0.4 part of silane coupling agent in a high-speed mixer After 4 minutes, add 35 parts of conductive tungsten powder over 1000 mesh, 3 parts of brominated flame retardant, 9 parts of synergistic flame retardant and 0.4 part of antioxidant and continue stirring for 8 minutes; the stirred mixture is placed in The feeding section of the twin-screw extruder is sequentially blended and melted from the first to ninth sections of the twin-screw extruder, and then extruded from the die head. The temperature of the first to ninth sections of the twin-screw extruder is: 160 ℃-180℃, 220℃-240℃, 220℃-240℃, 220℃-240℃, 220℃-240℃, 210℃-230℃, 210℃-230℃, 200℃-230℃, 200℃- 230°C; the die head temperature of the twin-screw extruder is 230°C-270°C. The main engine speed of the twin-screw machine is 300-500r / min; the feeding fre...

Embodiment 3

[0024] In parts by weight, put 38 parts of dried PA6 resin with a melting point of 225-230°C and an intrinsic viscosity of 2.4-2.7dl / g, 1.0 parts of maleic anhydride grafted POE and 0.1 parts of silane coupling agent in a high-speed mixer Pre-mix for 3 minutes, then add 30 parts of conductive tungsten powder with a mesh size of 1000 or more, 2 parts of brominated polystyrene, 8 parts of antimony pentoxide, and 0.1 part of tetrakis[β-(3,5-ditertbutyl Base-4-hydroxyphenyl)propionic acid]pentaerythritol ester continued to stir for 5 minutes; the stirred mixture was placed in the feed section of the twin-screw extruder, and after blending and melting from the first section to the ninth section of the twin-screw extruder, Extruded from the die head, the temperature of the first section to the ninth section of the twin-screw extruder is: 160°C-180°C, 220°C-240°C, 220°C-240°C, 220°C-240°C, 220°C- 240°C, 210°C-230°C, 210°C-230°C, 200°C-230°C, 200°C-230°C; the die head temperature of t...

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Abstract

The invention discloses a low-warpage high-heat-resistance conductive inflaming-retarding composite material and a preparing method thereof and relates to the field of engineering plastic. The composite material is prepared from, by weight, 38-60 parts of PA6 resin, 8-10 parts of fire retardant, 2-4 parts of synergistic fire retardant, 30-45 parts of metal conductive powder, 1.0-5.0 parts of toughening agent, 0.1-0.5 part of antioxidant and 0.1-0.5 part of coupling agent. By adding the metal conductive powder, preferably conductive tungsten powder which can disperse in the PA6 base material, the composite material has high conductivity; meanwhile, the conductive tungsten powder has strengthening and filling effects in the composite material, so that the heat resistance and size stability of the material are improved. By adding the fire retardant and the synergistic fire retardant, the material can reach the fireproofing grade of UL94-VO.

Description

technical field [0001] The invention relates to the field of engineering plastics, is mainly used in the field of electronic appliances, and in particular relates to a flame-resistant composite material with low warpage and high heat resistance and conductivity and a preparation method thereof. Background technique [0002] Nylon is an excellent engineering plastic with excellent mechanical properties, heat resistance, wear resistance, self-lubrication, good processability and electrical resistance. It is the first of the five engineering plastics and is widely used in electronic appliances use. Conductive materials are used more and more, which can be divided into structural type and filling type. Structural conductive plastic is a material that is conductive by itself or after being doped; filled conductive plastic is a material that does not have conductivity itself, but obtains conductivity by adding conductive fillers. Filled conductive plastics are made of synthetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L63/00C08L25/06C08L33/08C08L51/06C08K13/02C08K5/03C08K3/22C08K3/24C08K3/08C08K5/134C08K5/526
CPCC08K3/08C08K5/54C08K2003/0887C08L77/02C08L2201/02C08L2201/08C08L2205/03C08L51/06C08L25/06C08K13/02C08K3/2279C08K5/1345C08L33/08C08K5/03C08K5/526C08L63/00C08K3/24
Inventor 黄勇刘辉
Owner 古道尔工程塑胶(深圳)有限公司