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PTC (Positive Temperature Coefficient) heat-conducting ink and preparation method thereof

A technology of heat-conducting ink and ink, which is applied in ink, household utensils, applications, etc., can solve the problem of high energy consumption in the process, and achieve the effects of uniform heat distribution, simple operation of the preparation method, and fast heat transfer

Active Publication Date: 2022-03-25
东莞市博恩复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process consumes a lot of energy and needs to be heated to a higher temperature for melt blending and compression molding

Method used

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  • PTC (Positive Temperature Coefficient) heat-conducting ink and preparation method thereof
  • PTC (Positive Temperature Coefficient) heat-conducting ink and preparation method thereof
  • PTC (Positive Temperature Coefficient) heat-conducting ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of PTC heat-conducting ink of the present invention may further comprise the steps:

[0034] (1) Mix and stir the conductive filler B, semi-crystalline polymer and solvent, dry and grind to obtain conductive particles with PTC effect.

[0035] The conductive filler B is a combination of one or more of carbon black, graphite, graphene, titanium diboride, and metal micropowder; the semi-crystalline polymer is fatty alcohol, phase change wax, polyethylene wax, mustard A combination of one or more of acid amides; the solvent is a combination of one or more of xylene, ethyl acetate, N,N-dimethylformamide, and ethylene glycol butyl ether acetate.

[0036] The conductive filler B, the semi-crystalline polymer, and the solvent are mixed in a mass ratio of 1:1.2-1.5:12-15.

[0037] Specifically, weigh a certain mass of conductive filler B, semi-crystalline polymer, and solvent according to the mass ratio, mix and stir for 1 hour, then dry and grind to obt...

Embodiment 1

[0058] Take 60g of phase-change wax (melting point 60°C) and dissolve it in 600g of xylene, add 50g of carbon black, stir with a mixer for 1 hour, dry the solvent, and grind to obtain PTC1.2-60 (PTC conductive particles, phase-change wax and carbon black The mass ratio is 1.2, and the melting point of the phase change wax is 60°C).

[0059] Get 30g of acrylic resin, dissolve in 30g of dimethylbenzene, fully stir, mix evenly, obtain clear acrylic resin solution;

[0060] Add 10g of PTC1.2-60, 5g of alumina, and 0.1g of KH550 to the above solution, disperse at high speed, stir evenly, grind thoroughly with a three-roll mill, and then filter with an 80-mesh filter bag to obtain thermally conductive PTC ink.

Embodiment 2

[0062] Take 60g of phase-change wax (melting point 60°C) and dissolve it in 600g of xylene, add 40g of carbon black, stir with a mixer for 1 hour, dry the solvent, and grind to obtain PTC1.5-60 (PTC conductive particles, phase-change wax and carbon black The mass ratio is 1.5, and the melting point of the phase change wax is 60°C).

[0063] Get 30g of acrylic resin, dissolve in 30g of dimethylbenzene, fully stir, mix evenly, obtain clear acrylic resin solution;

[0064] Add 10g of PTC1.5-60, 5g of alumina, and 0.1g of KH550 to the above solution, disperse at high speed, stir evenly, fully grind with a three-roll mill, and then filter with an 80-mesh filter bag to obtain thermally conductive PTC ink.

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PUM

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Abstract

The invention relates to PTC (Positive Temperature Coefficient) heat-conducting ink and a preparation method thereof, and relates to the technical field of heat-conducting ink. The PTC heat-conducting ink comprises conductive particles, a heat-conducting filler A, a coupling agent and a solution, and the mass ratio of the conductive particles to the heat-conducting filler A to the coupling agent to the solution is (1-1.2): (0.5-2): (0.003-0.01): (4.5-6); the conductive particles comprise a conductive filler B, a semi-crystalline polymer and a solvent, the conductive filler B is one or a combination of more of carbon black, graphite, graphene, titanium diboride and metal micro powder, and the solvent is one or a combination of more of xylene, ethyl acetate, N, N-dimethylformamide and ethylene glycol butyl ether acetate; the heat-conducting filler A is one or a combination of more of aluminum oxide, zinc oxide, magnesium oxide, aluminum nitride and boron nitride; the solution comprises a binder and a solvent. The PTC heat-conducting ink disclosed by the invention is low in temperature control, good in heat conductivity, high in PTC ratio, stable in room-temperature resistance and fast in response; and the preparation method is simple to operate and can be suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of heat-conducting inks, in particular to a PTC heat-conducting ink and a preparation method thereof. Background technique [0002] "PTC" or "Positive Temperature Coefficient" materials, which are characterized by a sharp increase in resistivity when the temperature of the material reaches the switching temperature (Ts), have a positive slope as a function / curve of resistivity versus temperature and within this temperature range, the resistance The rate increases with increasing temperature. When the resistivity increases to a certain level, the resistance will effectively block the current and prevent the further heating of the material, avoiding the overheating of the material, and play the role of self-heating and temperature control. PTC self-controlling heating polymer composite material has the advantages of temperature self-control, power self-regulation, safety and reliability, energy saving and con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/03
CPCC09D11/52C09D11/03
Inventor 王婷陆婉仪
Owner 东莞市博恩复合材料有限公司
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