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A polybutylene terephthalate/polycarbonate insulating and heat-conducting composite material and its preparation method

A technology of polybutylene terephthalate and polycarbonate, which is applied in the field of polymer functional composite materials, can solve problems such as the inability to guarantee insulation performance, and achieve easy large-scale industrial production, increase effective concentration, and benefit phonon the effect of transmission

Active Publication Date: 2016-08-31
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN103289342A discloses a high thermal conductivity enhanced PC / PBT alloy, wherein the content of component PC is much greater than that of PBT, does not involve the dual continuous phase structure mentioned in the present invention, does not use transesterification inhibitors, and uses Conductive filler carbon fiber is added, so that the insulation performance of this material cannot be guaranteed

Method used

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  • A polybutylene terephthalate/polycarbonate insulating and heat-conducting composite material and its preparation method
  • A polybutylene terephthalate/polycarbonate insulating and heat-conducting composite material and its preparation method
  • A polybutylene terephthalate/polycarbonate insulating and heat-conducting composite material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 40 parts of polybutylene terephthalate, 20 parts of polycarbonate, 40 parts of boron nitride (surface treated with silane coupling agent KH560 accounting for 1.5 wt% of boron nitride mass) and 1 part of triphenyl phosphite The ester is mixed evenly in a high-speed mixer, and then added to a twin-screw extruder for uniform plasticization, extrusion, and granulation. The twin-screw extrusion temperature is 180-260°C, and the screw speed is 80-100rpm. The obtained pellets were formed into an insulating and heat-conducting composite material by hot pressing, and its properties are shown in Table 1.

Embodiment 2

[0034] Mix 30 parts of polybutylene terephthalate, 10 parts of polycarbonate, 60 parts of alumina (surface treated with silane coupling agent KH550 accounting for 2.0 wt% of alumina mass) and 1 part of stearic acid at high speed Mix evenly in the machine, and then add to the twin-screw extruder for uniform plasticization, extrusion, and granulation. The twin-screw extrusion temperature is 180-260°C, and the screw speed is 90-120rpm. The obtained pellets were formed into an insulating and heat-conducting composite material by hot pressing, and its properties are shown in Table 1.

Embodiment 3

[0036]20 parts of polybutylene terephthalate, 20 parts of polycarbonate, 25 parts of aluminum nitride (surface treated with silane coupling agent KH560 accounting for 1.5 wt% of aluminum nitride mass), 35 parts of aluminum oxide (treated with silane coupling agent KH560 (surface treatment), 1 part of triphenyl phosphite, and 1 part of liquid paraffin were mixed uniformly in a high-speed mixer, and then added to a twin-screw extruder to uniformly plasticize and extrude Extrusion and granulation, the twin-screw extrusion temperature is 180-260°C, and the screw speed is 90-120rpm. The obtained pellets were formed into an insulating and heat-conducting composite material by hot pressing, and its properties are shown in Table 1.

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Abstract

The invention discloses an insulated and heat-conductive polybutylene terephthalate / polycarbonate composite material and a preparation method thereof. The insulated and heat-conductive polybutylene terephthalate / polycarbonate composite material comprises the following components in parts by weight: 20-50 parts of polybutylene terephthalate, 10-30 parts of polycarbonate, 20-70 parts of a heat-conductive filler, 0-2 parts of a transesterification inhibitor, 0.5-2 parts of a silane coupling agent and 0-2 parts of a lubricating agent. The insulated and heat-conductive polybutylene terephthalate / polycarbonate composite material has good heat-conducting property and mechanical property and excellent insulating property and can be applied to such parts with heat dissipating and insulating requirements as LED heat dissipating lamp holders or shells of other electronic and electric products.

Description

technical field [0001] The invention belongs to the technical field of polymer functional composite materials, and in particular relates to a polybutylene terephthalate / polycarbonate insulating and heat-conducting composite material and a preparation method thereof. Background technique [0002] With the advancement of industrial technology, various electronic and electrical products emerge in endlessly, and the problem of aging or even burning of materials due to insufficient heat dissipation is becoming more and more serious. Therefore, the demand for thermally conductive plastics is becoming more and more urgent. Some electronic and electrical products require polymer materials not only to have good heat dissipation and insulation properties, but also to have a certain mechanical strength, which puts forward higher requirements for the material selection and composite technology of thermally conductive plastics. In the prior art, the thermal conductivity is generally impr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L69/00C08K13/06C08K9/06C08K3/22C08K3/38C08K3/34C08K3/28C08K5/526C09K5/14
Inventor 温变英邹文奇郭赫楠
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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