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Macromolecular heating material with PTC (Positive Temperature Coefficient) characteristic and preparation method thereof

A technology of heating materials and polymers, applied in the field of PTC heating materials and its preparation, can solve the problems of low stability, wide room temperature resistance distribution, and low PTC strength, and achieve high PTC stability, stable PTC characteristics, and increased service life Effect

Inactive Publication Date: 2013-09-18
ANBANG ELECTRICAL GRP
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  • Abstract
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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

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Embodiment Construction

[0009] A polymer heating material with PTC characteristics, made of the following raw materials in parts by weight: medium density polyethylene 90, nylon 6 8, carbon nanotube 8, carbon black 12, nickel powder 20, aluminum nitride 14 , medical stone powder 5, aluminum oxide 12, talcum powder 6, bentonite 25, vinyl triethoxysilane 10, Titanate coupling agent TMC-TTS 2 , Antioxidant 1010 2, Acetyl citrate tris (2-ethylhexyl) ester 3, p-tert-butylcatechol 2.

[0010] The preparation method of the polymer heating material with PTC characteristics includes the following steps: adding water to medium-density polyethylene powder and stirring to form a suspension, heating to 90-95°C, and then adding bentonite, carbon nanotubes, ethylene Triethoxysilane, after dispersing at high speed for 20-30 minutes, cool down to 60-65°C, then add Titanate coupling agent TMC-TTS , talcum powder, after stirring for 15-20 minutes, grind for 2-3 hours, to the slurry, spray dry to obtain powder; nylon...

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Abstract

The invention relates to a macromolecular heating material with a PTC (Positive Temperature Coefficient) characteristic. The macromolecular heating material is characterized by being prepared from the following raw materials in parts by weight: 90-95 parts of medium-density polyethylene, 5-8 parts of nylon 6, 5-8 parts of carbon nano-tube, 12-16 parts of carbon black, 20-30 parts of nickel powder, 12-14 parts of aluminum nitride, 5-8 parts of maifanite powder, 12-14 parts of alumina, 4-6 parts of talcum powder, 20-25 parts of bentonite, 10-12 parts of vinyl triethoxysilane, 2-3 parts of titanate coupling agent TMC-TTS, 1-2 parts of antioxidant 1010, 3-5 parts of acetyl tri(2-ethylhexyl) citrate and 1-2 parts of para-tert-butyl catechol. The macromolecular heating 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 PTC heating 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 polymer heating material with PTC characteristics and its preparation method, which has 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: [00...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L77/02C08K13/04C08K7/00C08K3/04C08K3/08C08K3/28C08K3/34C08K3/22
Inventor 李贻连
Owner ANBANG ELECTRICAL GRP
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