CN103304991A - PTC (Positive Temperature Coefficient) macromolecular heating material based on flame-retardant nylon 66 and preparation method thereof - Google Patents
PTC (Positive Temperature Coefficient) macromolecular heating material based on flame-retardant nylon 66 and preparation method thereof Download PDFInfo
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- CN103304991A CN103304991A CN 201310197396 CN201310197396A CN103304991A CN 103304991 A CN103304991 A CN 103304991A CN 201310197396 CN201310197396 CN 201310197396 CN 201310197396 A CN201310197396 A CN 201310197396A CN 103304991 A CN103304991 A CN 103304991A
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Abstract
The invention discloses a PTC (Positive Temperature Coefficient) macromolecular heating material based on flame-retardant nylon 66. The PTC macromolecular heating material is prepared from the following raw materials in parts by weight: 12-15 parts of nylon 66, 80-85 parts of ethylene-acrylic acid copolymer, 20-24 parts of carbon black, 10-12 parts of graphite, 20-24 parts of aluminum nitride, 16-18 parts of maifanite powder, 4-6 parts of glycerol, 3-5 parts of antimony trioxide, 16-18 parts of kaolin, 3-5 parts of propoxylated trimethylolpropane triacrylate, 3-4 parts of aminopropyl triethoxysilane, 2-4 parts of bi-tetradecenoic alcohol ester, 6-8 parts of tributyl citrate and 1-2 parts of sodium molybdate. The PTC 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
The invention belongs to polymeric material field, be specifically related to a kind of fire-retardant Nylon 66 based high molecular base PTC exothermic material and preparation method thereof.
Background technology
The PTC polymer heating material is as in overheated, the various fields such as overcurrent protection is widely used in communicating by letter with the temp auto-controlled heating material, computer, automobile, Industry Control, household electrical appliance.Mainly take graphite and carbon black as conductive filler material, mainly there is the room temperature resistance wider distribution in present organic PTC material, the problem such as PTC intensity is little, stability is lower.
Summary of the invention
The purpose of this invention is to provide a kind of fire-retardant Nylon 66 base PTC polymer heating material and preparation method thereof, possess low room temperature resistivity, long-term through-flow stable performance, high PTC intensity and high PTC stability.
Technical solution of the present invention is as follows:
A kind of fire-retardant Nylon 66 base PTC polymer heating material, it is characterized in that: the raw material by following weight part is made: nylon 66 12-15, ethylene-acrylic acid copolymer 80-85, carbon black 20-24, graphite 10-12, aluminium nitride 20-24, medical stone powder 16-18, glycerol 4-6, antimonous oxide 3-5, kaolin 16-18, the third oxidation Viscoat 295 3-5, aminopropyl triethoxysilane 3-4, two ten four carbon alcohols ester 2-4, tributyl citrate 6-8, Sodium orthomolybdate 1-2.
The preparation method of described fire-retardant Nylon 66 base PTC polymer heating material, it is characterized in that: may further comprise the steps: medical stone powder is added the ethanolic soln stirring make suspension, add again the third oxidation Viscoat 295, graphite, after high speed dispersion 20-30 minute, add again aluminium nitride, kaolin tributyl citrate, Sodium orthomolybdate, after stirring, ground 2-3 hour, to slurry, 80-90 ℃ of lower spraying drying obtains 300-400 order powder; Ethylene-acrylic acid copolymer, carbon black, aminopropyl triethoxysilane, two ten four carbon alcohols esters were descended mixing 20-30 minute at 80-110 ℃, obtain compound; Nylon 66 is heated to 190-250 ℃, adds gained powder and compound and other remaining excess material, mixed 8-15 minute, extruding pelletization obtains.
PTC polymer heating material of the present invention is pressed into sheet material, at sheet surface compacting wire, namely obtains the PTC fever tablet again.
The present invention adopts carbon black and graphite as conducing composite material, the third oxidation Viscoat 295, graphite
AddAluminium nitride, kaolin tributyl citrate, Sodium orthomolybdate grind, and increase the molecular network lattice structure between it, have to strengthen heat-resisting, anti-stream, the withstand voltage and effect that improves resistance change stability; Ethylene-acrylic acid copolymer of the present invention, carbon black, aminopropyl triethoxysilane, two ten four carbon alcohols esters are carried out a batch mixing, having increased each raw material forms dispersed, through behind the rerolling, increased the compatibility between each material composition, conductive network structure more firm, greatly improved PTC intensity of the present invention and high PTC stability, resistance stabilization, temperature is even, ptc characteristics is stable, the work-ing life of increase material.
Embodiment
Fire-retardant Nylon 66 base PTC polymer heating material is made by the raw material of following weight part (kilogram): nylon 66 15, ethylene-acrylic acid copolymer 80, carbon black 24, graphite 10, aluminium nitride 24, medical stone powder 18, glycerol 4, antimonous oxide 5, kaolin 16, the third oxidation Viscoat 295 3, aminopropyl triethoxysilane 3, two ten four carbon alcohols esters 4, tributyl citrate 8, Sodium orthomolybdate 1.
The preparation method may further comprise the steps: medical stone powder is added the ethanolic soln stirring make suspension, add again the third oxidation Viscoat 295, graphite, after high speed dispersion 20-30 minute, add again aluminium nitride, kaolin tributyl citrate, Sodium orthomolybdate, after stirring, ground 2-3 hour, to slurry, 80-90 ℃ of lower spraying drying obtains 300-400 order powder; Ethylene-acrylic acid copolymer, carbon black, aminopropyl triethoxysilane, two ten four carbon alcohols esters were descended mixing 20-30 minute at 80-110 ℃, obtain compound; Nylon 66 is heated to 190-250 ℃, adds gained powder and compound and other remaining excess material, mixed 8-15 minute, extruding pelletization obtains.
PTC polymer heating material of the present invention is pressed into sheet material, prepares the bar shaped sample of long 100mm, wide 6.5mm, thick 2mm, at sheet surface compacting wire, namely obtain the PTC fever tablet again.
Detect performance:
Room temperature (25 ℃) zero power resistance is 14m Ω, PTC intensity reaches more than 8.4, with its after thermal cycling between-20 ℃ and 140 ℃ 200 times its room temperature resistance still below 30m Ω, and the changing conditions of resistance is stable in thermal cycling, has long-term through-flow through-current capability greater than 100A.Generated heat 36 hours continuously at 200 times, without burning phenomenon.The PTC polymer heating material life-span: energising in 15 minutes was once cut off the power supply once circulation in 30 minutes, break-make 5000 times, power variation rate 95%, rate of temperature change 98% in 15 minutes.
Claims (2)
1. fire-retardant Nylon 66 base PTC polymer heating material, it is characterized in that: the raw material by following weight part is made: nylon 66 12-15, ethylene-acrylic acid copolymer 80-85, carbon black 20-24, graphite 10-12, aluminium nitride 20-24, medical stone powder 16-18, glycerol 4-6, antimonous oxide 3-5, kaolin 16-18, the third oxidation Viscoat 295 3-5, aminopropyl triethoxysilane 3-4, two ten four carbon alcohols ester 2-4, tributyl citrate 6-8, Sodium orthomolybdate 1-2.
2. the preparation method of fire-retardant Nylon 66 base PTC polymer heating material according to claim 1, it is characterized in that: may further comprise the steps: medical stone powder is added the ethanolic soln stirring make suspension, add again the third oxidation Viscoat 295, graphite, after high speed dispersion 20-30 minute, add again aluminium nitride, kaolin tributyl citrate, Sodium orthomolybdate, after stirring, ground 2-3 hour, to slurry, 80-90 ℃ of lower spraying drying obtains 300-400 order powder; Ethylene-acrylic acid copolymer, carbon black, aminopropyl triethoxysilane, two ten four carbon alcohols esters were descended mixing 20-30 minute at 80-110 ℃, obtain compound; Nylon 66 is heated to 190-250 ℃, adds gained powder and compound and other remaining excess material, mixed 8-15 minute, extruding pelletization obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310197396 CN103304991A (en) | 2013-05-24 | 2013-05-24 | PTC (Positive Temperature Coefficient) macromolecular heating material based on flame-retardant nylon 66 and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310197396 CN103304991A (en) | 2013-05-24 | 2013-05-24 | PTC (Positive Temperature Coefficient) macromolecular heating material based on flame-retardant nylon 66 and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103304991A true CN103304991A (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310197396 Pending CN103304991A (en) | 2013-05-24 | 2013-05-24 | PTC (Positive Temperature Coefficient) macromolecular heating material based on flame-retardant nylon 66 and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103304991A (en) |
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2013
- 2013-05-24 CN CN 201310197396 patent/CN103304991A/en active Pending
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Application publication date: 20130918 |