PTC (Positive Temperature Coefficient) thermistor base material and preparation method thereof

A thermistor and base material technology, applied in the direction of resistors with positive temperature coefficients, etc., can solve the problems of wide resistance distribution at room temperature, low PTC strength, and low stability, and achieve stable PTC characteristics, increased service life, and high Effect of PTC stability

Active Publication Date: 2013-09-18
ANBANG ELECTRICAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current organic PTC materials mainly use graphite and carbon black as conductive fillers, which mainly have problems such as wide room temperature resistance distribution, low PTC strength, and low stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] A PTC thermistor substrate, made of the following raw materials in parts by weight (kg): polyvinylidene fluoride 50, linear low-density polyethylene 30, carbon black 25, aluminum powder 24, aluminum nitride 16, medical stone powder 20. Aluminum hydroxide powder 16. Magnesium oxide 6. meerschaum 14 , Crosslinker TAC 5, Crosslinker TAIC 2, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane 5, isooctyltin dimethyl dimercaptoacetate 3, epoxidized triglyceride 8-.

[0010] The preparation method of the PTC thermistor base material comprises the following steps: adding aluminum hydroxide powder to water and stirring to form a suspension, then adding aluminum powder and medical stone powder, dispersing at high speed for 10-20 minutes, and heating to 80- 95℃, plus Cross-linking agent TAC, N-2-(Aminoethyl)-3-Aminopropyltrimethoxysilane, after stirring evenly, then add magnesium oxide powder, grind for 2-3 hours, to the slurry, spray dry to obtain powder; linear low density Mix...

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Abstract

The invention discloses a PTC (Positive Temperature Coefficient) thermistor base material. The PTC thermistor base material is prepared from the following raw materials in parts by weight: 50-55 parts of polyvinylidene fluoride, 30-35 parts of linear low-density polyethylene, 20-25 parts of carbon black, 18-24 parts of aluminum powder, 12-16 parts of aluminum nitride, 20-25 parts of maifanite powder, 16-18 parts of aluminum hydroxide powder, 6-8 parts of magnesia, 12-14 parts of meerschaum, 3-5 parts of crosslinker TAC, 1-2 parts of crosslinker TAIC, 5-8 parts of N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, 2-3 parts of tin dimethyl isooctyl thioglycolate and 8-10 parts of epoxidized triglyceride. The PTC thermistor base material and the preparation method thereof have the advantages that the PTC strength and PTC stability of the material are improved greatly, the resistance is stable, the temperature is uniform, the PTC characteristic is stable, and the service life of the material is prolonged.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polymer-based PTC thermistor base material and a preparation method thereof. Background technique [0002] PTC polymer heating materials are widely used in communication, computer, automobile, industrial control, household appliances and many other fields as overheating, overcurrent protection and self-control heating materials. The current organic PTC materials mainly use graphite and carbon black as conductive fillers, which mainly have problems such as wide distribution of room temperature resistance, low PTC strength, and low stability. Contents of the invention [0003] The purpose of the present invention is to provide a PTC thermistor base material and a preparation method thereof, which have low room temperature resistivity, long-term flow stability, high PTC strength and high PTC stability. [0004] Technical scheme of the present invention is as follows...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L23/08C08K13/02C08K3/04C08K3/08C08K3/28C08K5/544C08K5/1515H01C7/02
Inventor 李贻连
Owner ANBANG ELECTRICAL GRP
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