PTC thermosensitive resistor based on conducting polymer and application of PTC thermosensitive resistor

A thermistor, conductive polymer technology, applied in the direction of resistors with positive temperature coefficient, resistors, non-adjustable metal resistors, etc., can solve the problem of PTC material strength decrease, material density increase, lack of flexibility and rollability Winding and other issues, to achieve the effect of reducing the conductivity threshold, long service life, excellent winding and bending resistance

Inactive Publication Date: 2017-01-04
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The conductive material in the polymer PTC material with low resistance value at room temperature is generally carbon black. In order to achieve a lower resistance value, the conductive threshold is generally higher, and a large amount of carbon black needs to be added, which will lead to a decrease in the strength of the PTC material. The decrease of material density and the increase of material density; on the other hand, the current polymer PTC materials are rigid, lack of flexibility and windability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a PTC thermistor based on conductive polymer, comprising the following steps:

[0021] (1) Dissolve 100 parts of polyimide containing phenolic hydroxyl groups in the side chain in an organic solvent, then add 20 parts of polyacetylene and 25 parts of novolac epoxy resin, heat to 80 ° C, keep warm for 3 hours, and then naturally cool to 40 ℃, add 18 parts of silicon carbide, 18 parts of graphene, 6 parts of silicon dioxide, 3 parts of calcium oxide, and 8 parts of talc powder for ball milling for 1 hour, then add 0.5 parts of anti-aging agent, 0.5 parts of flame retardant, and 0.1 part of anti-dripping agent, stirred for 10 to 20 minutes, dried and cooled to obtain composite masterbatch;

[0022] (2) Preheat the extruder to 160°C, put in the masterbatch, raise the temperature to 2000°C, keep warm for 3-5 minutes, extrude to obtain a sheet, mold the sheet with a hot press for 3-6 minutes, and then press it at 50 Keep warm at ℃ for 5-10 minutes, co...

Embodiment 2

[0025] A preparation method of a PTC thermistor based on conductive polymer, comprising the following steps:

[0026] (1) Dissolve 90 parts of polyimide containing phenolic hydroxyl groups in the side chain in an organic solvent, then add 15 parts of polyacetylene and 40 parts of novolak epoxy resin, heat to 80 ° C, keep it warm for 2 hours, and then naturally cool to 40 ℃, add 10 parts of magnesium oxide, 10 parts of carbon nanotubes, 3 parts of silicon dioxide, 3 parts of calcium oxide, and 12 parts of talc powder for ball milling for 1.5 hours, then add 0.5 parts of anti-aging agent, 1.2 parts of flame retardant, 0.1 part of anti-aging agent Dropping agent, after stirring for 10-20 minutes, dry and cool to obtain composite masterbatch;

[0027] (2) Preheat the extruder to 160°C, put in the masterbatch, raise the temperature to 200°C, keep it warm for 3-5 minutes, extrude to obtain a sheet, mold the sheet with a hot press for 3-6 minutes, and then press it at 40 Keep warm a...

Embodiment 3

[0030] A preparation method of a PTC thermistor based on conductive polymer, comprising the following steps:

[0031] (1) Dissolve 100 parts of polyimide containing phenolic hydroxyl groups in the side chain in an organic solvent, then add 18 parts of polyacetylene and 30 parts of novolac epoxy resin, heat to 90 ° C, keep warm for 2, and then naturally cool to 50 ℃, add 20 parts of alumina, 15 parts of silver powder, 8 parts of silicon dioxide, 5 parts of calcium oxide, and 8 parts of talc powder for ball milling for 2 hours, then add 0.3 parts of anti-aging agent, 0.5 parts of flame retardant, and 0.1 part of anti-dripping agent , after stirring for 10 to 20 minutes, dry and cool to obtain composite masterbatch;

[0032] (2) Preheat the extruder to 180°C, put in the masterbatch, raise the temperature to 220°C, keep it warm for 3-5 minutes, extrude to obtain a sheet, and mold the sheet with a hot press for 3-6 minutes, and then press it at 40 Keep warm at ℃ for 5-10 minutes, ...

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PUM

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Abstract

The invention discloses a PTC thermosensitive resistor based on a conducting polymer and application of the PTC thermosensitive resistor. The PTC thermosensitive resistor based on the conducting polymer is prepared from polyimide, polyacetylene, phenolic epoxy resin, conductive filler, thermal conducting filler, silicon dioxide, calcium oxide and talcum powder. The PTC thermosensitive resistor based on the conducting polymer has the advantages of being high in temperature sensibility, short in response time, low in residual current and high in stability, has the excellent winding property and fracture resistance, can be widely applied to automatic temperature-control heaters such as a plate-type automatic temperature-control heater, an automatic temperature-control heating band, a tubular automatic temperature-control heater and an automatic temperature-control heating cable which have various shapes and is long in service life.

Description

technical field [0001] The invention relates to the technical field of a conductive polymer-based PTC thermistor and its application, in particular to a conductive polymer-based PTC thermistor and its application. Background technique [0002] Thermistors can be divided into positive temperature coefficient thermistors (PTCR) and negative temperature coefficient thermistors (NTCR) according to their resistance-temperature characteristics. The widely used PTC thermistor is mainly BaTiO 3 system materials and conductive polymer composites (CPCs). Conductive polymer composites are functional composites made by adding conductive fillers to the polymer matrix. [0003] Since Frydman discovered this phenomenon in 1945, polymer PTC has become a research and development hotspot. The application of polymer PTC materials is mainly divided into two categories: thermistor materials and self-limiting temperature heating materials. Polymer PTC can be made into a thermistor. Its temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L49/00C08L63/00C08K3/34C08K3/04C08K3/36C08K3/22C08K13/04C08K7/24C08K3/08C08K7/06H01C7/02
CPCC08L79/08C08K2201/014C08L2201/02C08L2203/20C08L2205/03H01C7/02H01C7/028C08L49/00C08L63/00C08K3/34C08K3/04C08K3/36C08K2003/2206C08K13/04C08K2003/222C08K7/24C08K2003/2227C08K2003/0806C08K7/06
Inventor 汪洋陈启志李国春江盈
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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