CN104151667A - Special filler for hydrophobic flame-retardant capacitor films and preparation method thereof - Google Patents

Abstract

The invention relates to a special filler for hydrophobic flame-retardant capacitor films. The special filler is prepared from the following raw materials in parts by weight: 8-13 parts of high-density polyethylene (HDPE), 7-10 parts of zinc borate, 3-5 parts of magnesium hydroxide, 2-3 parts of isopropanol, 10-14 parts of hydrophobic carbon black, 3-4 parts of polyethylene oxide, 3-5 parts of sodium benzoate, 60-65 parts of municipal sludge, a right amount of 5-7% hydrochloric acid, a right amount of water and 15-20 parts of assistant. By adding the hydrophobic carbon black, the filler has favorable reinforcing performance, is hydrophobic, and is moistureproof and moldproof. The zinc borate and magnesium hydroxide are added to enhance the flame retardancy of the film. The municipal sludge is utilized to lower the cost, so that the filler has high fineness and favorable reinforcing performance. The assistant can enhance the dispersity and reinforcing performance of the filler, and improve the strength and impact toughness of the film.

Description

Fire-retardant capacitor film filler special of a kind of hydrophobicity and preparation method thereof

Technical field

The invention belongs to capacitor film field, particularly fire-retardant capacitor film filler special of a kind of hydrophobicity and preparation method thereof.

Background technology

Film capacitor, owing to having a lot of good characteristics, is therefore the outstanding electrical condenser of a kind of performance.Its property such as main is as follows: nonpolarity, insulation impedance is very high, frequency response characteristic excellent (frequency response is broad), and also dielectric loss is very little.Advantage based on above, so film capacitor is used on mimic channel in a large number.Especially in the part of signal commissure, necessary frequency of utilization characteristic is good, and the electrical condenser that dielectric loss is extremely low can guarantee that signal is when transmitting, and does not have too large distortion situation and occurs.

In the middle of all plastics film electric capacity, the characteristic of polypropylene (PP) electric capacity and polystyrene (PS) electric capacity is the most remarkable, thus in recent years PP electric capacity and PS electric capacity to be used in frequency and the quantity of sound appliances also more and more high.Simple polypropylene (PP) is although that film has is heat-resisting, corrosion-resistant, the outstanding advantages of goods used vapour sterilization, and also density is little, is the lightest general-purpose plastics; But it exists low-temperature impact resistance poor, easy aging shortcoming.Polystyrene (PS) film has high transparency, and electrical insulation capability is good, easy coloring, and processing fluidity is good, and good rigidly and chemical resistance are good, but more crisp, and shock strength is low, is prone to stress cracking, poor heat resistance and not resistance to boiling water; Therefore need to carry out modification to film.And along with the range of application of electrical condenser increases gradually, the performance of film also needs to improve, such as heat-resisting, low temperature resistant, acid and alkali-resistance, corrosion-resistant, intensity, ageing-resistant, UV resistant, fire-retardant, wear-resisting, toughness, the performance need such as shock-resistant improve, can be by adding the filler modified performance of improving.

Summary of the invention

The object of the present invention is to provide fire-retardant capacitor film filler special of a kind of hydrophobicity and preparation method thereof, this filler not only reinforcing property is good, and has hydrophobicity, can moistureproof and mildewproof, can increase the flame retardant properties of film.

Technical scheme of the present invention is as follows:

The fire-retardant capacitor film filler special of hydrophobicity, is characterized in that being made by the raw material of following weight part: high density polyethylene 8-13, zinc borate 7-10, magnesium hydroxide 3-5, Virahol 2-3, hydrophobic carbon black 10-14, polyethylene oxide 3-4, Sodium Benzoate 3-5, municipal sludge 60-65,5-7% hydrochloric acid is appropriate, water appropriate, auxiliary agent 15-20;

Described auxiliary agent is made by the raw material of following weight part: zinc sulfate 0.5-0.8, nano barium sulfate 1-1.5, lime powder 2-3, EDETATE SODIUM 0.2-0.4, benzotriazole 0.2-0.3, silicon ash 5-7,2-3% hydrochloric acid soln 10-15, sodium oleate 0.1-0.2, silane coupling agent KH-572 0.1-0.2, ethyl propenoate 2-3, diethylene glycol dibutyl ether 1-2, butyl (tetra) titanate 0.1-0.2, ethylene glycol amine 0.1-0.2, fatty acid amine 0.5-0.8, ammonium persulphate 0.1-0.2, water are appropriate; Preparation method is: silicon ash is mixed with 2-3% hydrochloric acid soln, be heated to 50-60 ℃, stirring reaction 20-30 minute, filter, obtain filter residue, being washed to pH is 6-8, dry, mix with zinc sulfate, EDETATE SODIUM, benzotriazole, sodium oleate, diethylene glycol dibutyl ether, butyl (tetra) titanate, ethylene glycol amine, fatty acid amine again, grind 15-20 minute, obtain silicon ash particle; Again silane coupling agent KH-572 is added in suitable quantity of water, add again silicon ash particle, after stirring, add ethyl propenoate, after stirring, be warming up to 70-80 ℃, add ammonium persulphate, stirring reaction 20-30 minute, then add lime powder, continue stirring reaction 30-40 minute, dry, mix with other remaining components, dispersion grinding becomes the particle of 2-50 μ m, obtains.

The preparation method of the fire-retardant capacitor film filler special of described hydrophobicity, is characterized in that comprising the following steps:

(1) municipal sludge is sent in calcining furnace, at 700-800 ℃, calcined 2-3 hour, take out and pulverize, cross 100 mesh sieves, add again 2-3 5-7% hydrochloric acid doubly, be heated to 50-70 ℃, stir 10-20 minute, filter, filter residue, pickling once, then is washed to neutrality more as stated above, filter, obtain particle;

(2) high density polyethylene, zinc borate, magnesium hydroxide, Virahol, hydrophobic carbon black, polyethylene oxide, Sodium Benzoate are mixed, grind 20-30 minute, obtain mixture;

(3) mixing of materials (1) step and (2) step being obtained, adds suitable quantity of water to stir into mud shape, grinds to form the slurry of 2-50 μ m, and spraying is dry, then mixes with other remaining components, obtains.

Beneficial effect of the present invention

Filler of the present invention has added hydrophobic carbon black, and not only reinforcing property is good, and has hydrophobicity, can moistureproof and mildewproof; By adding zinc borate, magnesium hydroxide, increased the flame retardant properties of film; By using municipal sludge, reduced cost, fineness is high, and reinforcing property is good; The application of the invention auxiliary agent, can improve dispersiveness, the reinforcing property of filler, can improve thin film strength and tough.

Embodiment

The fire-retardant capacitor film filler special of hydrophobicity, by following weight part (kilogram) raw material make: high density polyethylene 11, zinc borate 9, magnesium hydroxide 4, Virahol 2.5, hydrophobic carbon black 12, polyethylene oxide 3.5, Sodium Benzoate 4, municipal sludge 63,6% hydrochloric acid are appropriate, water appropriate, auxiliary agent 18;

Described auxiliary agent by following weight part (kilogram) raw material make: zinc sulfate 0.6, nano barium sulfate 1.3, lime powder 2.5, EDETATE SODIUM 0.3, benzotriazole 0.3, silicon ash 6,2.5% hydrochloric acid soln 13, sodium oleate 0.1, silane coupling agent KH-572 0.1, ethyl propenoate 2.5, diethylene glycol dibutyl ether 1.5, butyl (tetra) titanate 0.1, ethylene glycol amine 0.1, fatty acid amine 0.7, ammonium persulphate 0.1, water are appropriate; Preparation method is: silicon ash is mixed with 2.5% hydrochloric acid soln, be heated to 55 ℃, stirring reaction 25 minutes, filter, obtain filter residue, being washed to pH is 7, dry, mix with zinc sulfate, EDETATE SODIUM, benzotriazole, sodium oleate, diethylene glycol dibutyl ether, butyl (tetra) titanate, ethylene glycol amine, fatty acid amine again, grind 18 minutes, obtain silicon ash particle; Again silane coupling agent KH-572 is added in suitable quantity of water, add again silicon ash particle, after stirring, add ethyl propenoate, after stirring, be warming up to 78 ℃, add ammonium persulphate, stirring reaction 28 minutes, then add lime powder, continue stirring reaction 38 minutes, dry, mix with other remaining components, dispersion grinding becomes the particle of 2-50 μ m, obtains.

The preparation method of the fire-retardant capacitor film filler special of described hydrophobicity, comprises the following steps:

(1) municipal sludge is sent in calcining furnace, at 750 ℃, calcined 2.5 hours, take out and pulverize, cross 100 mesh sieves, then add 6% hydrochloric acid of 2.5 times, be heated to 60 ℃, stir 15 minutes, filter, obtain filter residue, pickling once, then is washed to neutrality more as stated above, filters, and obtains particle;

(2) high density polyethylene, zinc borate, magnesium hydroxide, Virahol, hydrophobic carbon black, polyethylene oxide, Sodium Benzoate are mixed, grind 25 minutes, obtain mixture;

(3) mixing of materials (1) step and (2) step being obtained, adds suitable quantity of water to stir into mud shape, grinds to form the slurry of 2-50 μ m, and spraying is dry, then mixes with other remaining components, obtains.

Experimental data: the filler of the present embodiment is added in polypropylene capacitor film, and addition is 10-15%, film thickness is 2-50 μ m, film breakdown magnitude of voltage >=0.60kV/ μ m(100 ℃).

Claims (2)

1. the fire-retardant capacitor film filler special of hydrophobicity, is characterized in that being made by the raw material of following weight part: high density polyethylene 8-13, zinc borate 7-10, magnesium hydroxide 3-5, Virahol 2-3, hydrophobic carbon black 10-14, polyethylene oxide 3-4, Sodium Benzoate 3-5, municipal sludge 60-65,5-7% hydrochloric acid is appropriate, water appropriate, auxiliary agent 15-20;

Described auxiliary agent is made by the raw material of following weight part: zinc sulfate 0.5-0.8, nano barium sulfate 1-1.5, lime powder 2-3, EDETATE SODIUM 0.2-0.4, benzotriazole 0.2-0.3, silicon ash 5-7,2-3% hydrochloric acid soln 10-15, sodium oleate 0.1-0.2, silane coupling agent KH-572 0.1-0.2, ethyl propenoate 2-3, diethylene glycol dibutyl ether 1-2, butyl (tetra) titanate 0.1-0.2, ethylene glycol amine 0.1-0.2, fatty acid amine 0.5-0.8, ammonium persulphate 0.1-0.2, water are appropriate; Preparation method is: silicon ash is mixed with 2-3% hydrochloric acid soln, be heated to 50-60 ℃, stirring reaction 20-30 minute, filter, obtain filter residue, being washed to pH is 6-8, dry, mix with zinc sulfate, EDETATE SODIUM, benzotriazole, sodium oleate, diethylene glycol dibutyl ether, butyl (tetra) titanate, ethylene glycol amine, fatty acid amine again, grind 15-20 minute, obtain silicon ash particle; Again silane coupling agent KH-572 is added in suitable quantity of water, add again silicon ash particle, after stirring, add ethyl propenoate, after stirring, be warming up to 70-80 ℃, add ammonium persulphate, stirring reaction 20-30 minute, then add lime powder, continue stirring reaction 30-40 minute, dry, mix with other remaining components, dispersion grinding becomes the particle of 2-50 μ m, obtains.

2. the preparation method of the fire-retardant capacitor film filler special of hydrophobicity according to claim 1, is characterized in that comprising the following steps:

(1) municipal sludge is sent in calcining furnace, at 700-800 ℃, calcined 2-3 hour, take out and pulverize, cross 100 mesh sieves, add again 2-3 5-7% hydrochloric acid doubly, be heated to 50-70 ℃, stir 10-20 minute, filter, filter residue, pickling once, then is washed to neutrality more as stated above, filter, obtain particle;

(2) high density polyethylene, zinc borate, magnesium hydroxide, Virahol, hydrophobic carbon black, polyethylene oxide, Sodium Benzoate are mixed, grind 20-30 minute, obtain mixture;

(3) mixing of materials (1) step and (2) step being obtained, adds suitable quantity of water to stir into mud shape, grinds to form the slurry of 2-50 μ m, and spraying is dry, then mixes with other remaining components, obtains.