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High-impedance high-heat conduction PBT composite material

A composite material, high thermal conductivity technology, applied in the field of functional materials, can solve the problems of reducing the mechanical properties of materials, decreasing the volume resistivity, limited application scope of materials, etc., to achieve the effect of excellent mechanical properties and a wide range of applications

Inactive Publication Date: 2010-11-03
GUANGDONG HIGH & NEW ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, traditional thermal conductive materials are currently unable to meet the needs of industrial and technological development.
[0004] As a high molecular organic polymer, PBT has a thermal conductivity of about 0.22w / m·k and a volume resistivity of >10 4 Ω·cm, the heat conduction PBT products currently developed in the market are mainly modified by adding graphite / carbon black, carbon fiber, metal powder, and other heat conduction materials. At the same time, the addition of will cause the volume resistivity of the system to drop significantly, thus limiting the scope of use of the product
[0005] Inorganic thermally conductive materials, such as aluminum nitride, have a high thermal conductivity and are a good thermally conductive material, but their interface affinity with the resin is poor. Adding them to the resin will greatly reduce the mechanical properties of the material, resulting in Very limited range of applications

Method used

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  • High-impedance high-heat conduction PBT composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high resistance and high thermal conductivity PBT composite material contains the following parts by weight:

[0024] 55 copies of PBT;

[0025] 0.4 parts of antioxidant, consisting of 0.1 part of phenolic antioxidant 2246, 0.3 part of phosphite antioxidant 168;

[0026] 10 parts of surface-active modified aluminum nitride;

[0027] 5 parts of tougheners, composed of polypropylene grafted maleic anhydride;

[0028] 30 parts of reinforcing material, composed of alkali-free glass fiber.

[0029] The modification methods of surface active modified aluminum nitride include:

[0030] Mix dry aluminum nitride and 0.3% aluminum nitride stearic acid at 100°C evenly, then add 1.0% aluminum nitride acrylic acid, stir at 120°C for 15 minutes, continue to stir and cool to room temperature.

Embodiment 2

[0032] The high resistance and high thermal conductivity PBT composite material contains the following parts by weight:

[0033] 32 copies of PBT;

[0034] 0.2 part of antioxidant, composed of hindered phenol antioxidant 1010;

[0035] 30 parts of surface-active modified aluminum nitride;

[0036] 8 parts of tougheners, composed of polypropylene grafted maleic anhydride;

[0037] Reinforcement material, consisting of alkali-free glass fibers.

[0038] Mix dry aluminum nitride and sodium stearate with a mass of 0.7% of aluminum nitride at 115°C, then add acrylic acid with a mass of 0.3% of aluminum nitride, stir at 115°C for 15 minutes, continue to stir and cool to room temperature to obtain .

Embodiment 3

[0040] The high resistance and high thermal conductivity PBT composite material contains the following parts by weight:

[0041] 32 copies of PBT;

[0042] 0.4 part of antioxidant, made up of 0.2 part of phenolic antioxidant 264 (BHT), 0.2 part of phosphite antioxidant 626;

[0043] 40 parts of surface-active modified aluminum nitride;

[0044] 8 parts of tougheners, composed of ethylene elastomer grafted maleic anhydride;

[0045] 20 parts of reinforcing material, composed of alkali-free glass fiber.

[0046] Mix dry aluminum nitride and stearic acid with a mass of 0.5% of aluminum nitride at 95°C, then add butyl acrylate with a mass of 0.3% of aluminum nitride, stir at 120°C for 13 minutes, continue to stir and cool to room temperature to obtain .

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Abstract

The invention discloses a high-impedance high-heat conduction PBT composite material, which comprises the following components in parts by weight: 30-80 parts of PBT, 0.2-0.8 part of antioxidant, 10-60 parts of surface activity modified metal nitrides, 1-10 parts of flexibilizers and 5-30 parts of reinforcing materials. The composite material has excellent mechanical property, the heat conduction coefficient is improved by 1-3 times compared to the PBT resin and the volume resistivity is kept at above 1012 ohm; and therefore, the composite material is a perfect high-resistance high-heat conduction composite material and has a wide application range.

Description

technical field [0001] The invention relates to a functional material, in particular to a PBT composite material with high impedance and high thermal conductivity. Background technique [0002] Polybutylene terephthalate, English name polybutylece terephthalate (referred to as PBT), PBT is milky white translucent to opaque, crystalline thermoplastic polyester. It has high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, low water absorption, only 0.1%, and still maintains various physical properties (including electrical properties) and electrical insulation in a humid environment. However, volume resistance and dielectric loss are large. It is widely used in communications, electronic appliances, automobiles, construction machinery and other industries. [0003] With the development of industrial production and science and technology, some fields that require high thermal conductivity of materials, such as hea...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K13/06C08K9/04C08K3/28
Inventor 张积宾皮正亮曾斌朱国良
Owner GUANGDONG HIGH & NEW ENG PLASTICS
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