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Compound PTC thermistor heating material

A thermistor and heating material technology, applied in the field of heater production, can solve the problems of PTC characteristic repeatability decline, low tensile strength performance, uneven material temperature rise and fall, etc., to achieve excellent mechanics, high sensitivity, The effect of stabilizing the temperature resistance change rate

Inactive Publication Date: 2016-10-12
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic PTC thermistor heat conduction material still adopts the formula of the 1990s, and due to the limitation of processing conditions and environmental conditions in production, the tensile strength of the product is not high, and the temperature of the material rises and falls unevenly. PTC characteristics are unstable, and the repeatability of PTC characteristics is reduced, which further shortens the service life of the heater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a composite PTC thermistor heating material, the steps are as follows:

[0027] S1. Preparation of conductive silicone rubber: in parts by weight, 4 parts of conductive acetylene, 10 parts of carbon black and 25 parts of silicone rubber were mixed in an internal mixer at a mixing temperature of 225° C., and melt blended for 2.5 hours;

[0028] S2. Preparation of functional materials: Calcined 8 parts of copper powder, 1 part of strontium carbonate, 3 parts of iron oxide, 2 parts of barium titanate and 4 parts of vanadium oxide at 450-600°C for 0.5h, cooled, and pulverized into 600- Mix 1000 mesh with 4 parts of graphene, 2 parts of polyacrylamide, 5 parts of modified cellulose, 4 parts of polyacryl alcohol, and 1 part of N, N-dimethylformamide;

[0029] S3. Auxiliary preparation: 2 parts of anti-aging agent DTDM, 0.5 parts of accelerator M, 2 parts of antioxidant DLTP, 1 part of dispersant NNO, 2 parts of zinc oxide, 2 parts of zinc stearate, 3 p...

Embodiment 2

[0035] A preparation method of a composite PTC thermistor heating material, the steps are as follows:

[0036] S1. Preparation of conductive silicone rubber: in parts by weight, 3 parts of conductive acetylene, 13 parts of carbon black and 22 parts of silicone rubber were mixed in an internal mixer at a mixing temperature of 215°C, and melt blended for 3.5 hours;

[0037] S2. Preparation of functional materials: Calcined 9 parts of copper powder, 0.5 parts of strontium carbonate, 4 parts of iron oxide, 2 parts of barium titanate and 5 parts of vanadium oxide at 450-600 ° C for 0.5-1 h, cooled and pulverized into 600 -1000 mesh mixed with 3 parts of graphene, 3 parts of polyacrylamide, 3 parts of modified cellulose, 6 parts of polyacryl alcohol, 0.5 part of N, N-dimethylformamide;

[0038] S3. Auxiliary preparation: 3 parts of anti-aging agent DTDM, 0.5 part of accelerator M, 2 parts of antioxidant DLTP, 0.5 part of dispersant NNO, 3 parts of zinc oxide, 1 part of zinc stearate...

Embodiment 3

[0044] A preparation method of a composite PTC thermistor heating material, the steps are as follows:

[0045] S1. Preparation of conductive silicone rubber: in parts by weight, 4 parts of conductive acetylene, 12 parts of carbon black and 24 parts of silicone rubber were mixed in an internal mixer at a mixing temperature of 242°C, and melt blended for 3 hours;

[0046] S2. Preparation of functional materials: Calcined 7 parts of copper powder, 1 part of strontium carbonate, 3 parts of iron oxide, 2 parts of barium titanate and 4 parts of vanadium oxide at 450-600 ° C for 1 hour, cooled, and pulverized into 600-1000 Mesh and 4 parts of graphene, 2 parts of polyacrylamide, 34 parts of modified cellulose, 3 parts of polyacryl alcohol, 1.5 parts of N, N-dimethylformamide mixed;

[0047] S3. Auxiliary preparation: 1 part of anti-aging agent DTDM, 1 part of accelerator M, 2 parts of antioxidant DLTP, 0.5 part of dispersant NNO, 3 parts of zinc oxide, 1 part of zinc stearate, 3 part...

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PUM

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Abstract

The invention relates to the technical field of heater production, in particular to a composite PTC thermistor heating material. It consists of raw materials with the following weight fractions: conductive silicone rubber 58.5-68.2%; functional materials 18.5-30.8%; additives: 5.6-13.3%. The composite PTC thermistor heating material provided by the invention has high temperature sensitivity, low thermal inertia, good resistance stability, uniform temperature rise, and excellent mechanical, thermal and chemical stability.

Description

technical field [0001] The invention relates to the technical field of heater production, in particular to a composite PTC thermistor heating material. Background technique [0002] Functional polymer materials are currently a hot spot in material science research, and polymer composite conductive materials with PTC characteristics are among the best. So far, the academic and industrial circles are actively researching and developing them. The so-called polymer PTC composite conductive material is a polymer composite conductive material with PTC resistance characteristics. That is to say, within a certain temperature range, the resistivity of the conductive material itself will increase with the increase of temperature. PTC heater is a kind of heater that uses PTC thermistor element as the heat source. It is widely used in auxiliary heating of air conditioners, heaters, heaters and other electrical equipment. Changes, its resistance value increases or decreases accordingly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L29/02C08L33/26C08L1/08C08K13/02C08K3/24C08K3/04C08K3/08C08K3/22
CPCC08L83/04C08K2201/014C08L2203/20C08L2205/035C08L29/02C08L33/26C08L1/08C08K13/02C08K3/24C08K3/04C08K2003/085C08K2003/2227
Inventor 汪洋陈启志危国慧权惠玲
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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