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Flame-retardant resin composition with positive resistance temperature coefficient

A temperature coefficient, flame retardant resin technology, applied in the direction of fire retardant coatings, etc., can solve the problems that do not involve the type and specific dosage of flame retardants, and achieve the effects of good axial resistance uniformity, stable PTC characteristics, and small resistance dispersion

Inactive Publication Date: 2005-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

JP11-283808 discloses a PTC composition, with 50-90% (weight percent) unsaturated polyester or vinyl ester as the base resin, adding 5-30% carbon black, and adding <20% flame retardant The PTC material made of flame retardant has good power-on and power-off stability, and the room temperature resistivity changes little before and after power-on and power-off, but it does not involve the type and specific amount of flame retardant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Component content g

[0024] LLDPE (103AA, produced by Lanzhou Petrochemical Company, the same below) 442

[0025] CPE (30% chlorine content) 200

[0026] CB (Fujian Nanping Chemical Factory, the same below) 200

[0027] Decabromodiphenyl ether 100

[0028] Antimony trioxide 50

[0029] Crosslinker TAIC 5

[0030] Antioxidant 1010 2

[0031] Calcium Stearate 1

[0032] The measured OI is 29.7, the PTC strength is 4.2, the heating temperature is 68°C, and the initial resistivity is 4.5×10 3 Ω·cm, the power does not change after 6000 hours of electrification.

Embodiment 2

[0034] Component content g

[0035] LLDPE(103AA) 542

[0036] CPE (30% chlorine content) 100

[0037]CB 200

[0038] Decabromodiphenyl ether 100

[0039] Antimony trioxide 50

[0040] Crosslinker TAIC 5

[0041] Antioxidant 1010 2

[0042] Calcium Stearate 1

[0043] The measured OI is 27.6, the PTC strength is 4.3, the heating temperature is 67.5°C, and the initial resistivity is 5×10 3 Ω·cm, the power does not change after 6000 hours of electrification.

Embodiment 3

[0045] Component content g

[0046] LLDPE(103AA) 342

[0047] CPE (30% chlorine content) 300

[0048] CB 200

[0049] Decabromodiphenyl ether 100

[0050] Antimony trioxide 50

[0051] Crosslinker TAIC 8

[0052] The measured OI is 31, the PTC strength is 4, the heating temperature is 65°C, and the initial resistivity is 8×10 3 Ω·cm, the power does not change after 6000 hours of electrification.

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Abstract

Disclosed is a flame-retardant resin composition with positive resistance temperature coefficient, which comprises 30-60% LLDPE, 10-30% chlorinated polyethylene, 15-25% conductive carbon black, 10-20% decabromodiphenyl oxide and antimony trioxide common flame retardant, 5-10% processing adjuvant. The heating cables produced from the composition have good tensile property, bending property and gumming ageing characteristics.

Description

technical field [0001] The invention relates to a composition with a positive temperature coefficient of resistance (PTC), especially a PTC composition with flame-retardant properties. Background technique [0002] When a certain amount of conductive particles are mixed into the polymer matrix, such as carbon black, graphite, metal oxide, etc., it can be made into an organic PTC material with PTC effect (Positive Temperature Coefficient). The remarkable feature of this material is that its resistance changes nonlinearly with temperature, and it exhibits unique PTC characteristics in the critical composition region. Due to the recoverability of the structure and properties of the material with temperature changes, when the temperature increases or decreases, The heating power of the material can automatically adjust itself along the curve, so it is also called "temperature memory material". At present, organic PTC materials have been widely used in the preparation of self-lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/14
Inventor 殷茜赵振兴李社青张立基赵旭涛
Owner PETROCHINA CO LTD
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