CN107674547A - A kind of two-step method low temperature consolidates magnet ring special powder and preparation method thereof soon - Google Patents
A kind of two-step method low temperature consolidates magnet ring special powder and preparation method thereof soon Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08L2205/00—Polymer mixtures characterised by other features
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Abstract
The invention discloses a kind of two-step method low temperature to consolidate magnet ring special powder and preparation method thereof soon, the two-step method low temperature consolidates magnet ring special powder and expects that master batch and B material master batches form by A soon, A material master batch by dryings, weighing, blending, melting extrusion, cold pressing, crush be made, B material by dryings, weighings, blending, melting extrusion, cold pressing, it is broken be made, A expects that master batch and B expect master batch in mass ratio 9:1 carries out blending granulation, and by crushing, sieving, magnetic separation obtains finished powder.Two-step method low temperature of the present invention consolidates magnet ring special powder excellent stability soon, and it is short to overcome existing storage period, summer premature cure in transit, and the technological deficiencies such as mobility is unstable.
Description
Technical field
The present invention relates to a kind of two-step method low temperature to consolidate magnet ring special powder and preparation method thereof soon, belongs to functional paint neck
Domain.
Background technology
Magnet ring, a kind of magnetic conductor of ring-type, be in electronic circuit commonly use anti-interference element, be widely used in electric power, electronics,
The fields such as data communications equipment, require height, it is necessary to be insulated to its external coating electrical insulation capability and high voltage withstanding breakdown
Protection and mechanical protection.The coating process of magnet ring needs to complete within the extremely short time, high to application appearance requirement, therefore,
The powdery paints of application needs low-temperature fast-curing in a short time, at present, the such powdery paints stability in domestic market is poor,
Storage period is extremely short, summer high temperature transport difficult, and very big difficulty is brought to producer.Therefore, it is good to develop a kind of stability,
It is very necessary that the low temperature of storage period length consolidates powder soon.
The content of the invention
It is an object of the invention to provide a kind of two-step method low temperature to consolidate magnet ring special powder soon, has that low temperature is solid soon, it is outer to coat
See, halogen-free flameproof, high bin stability the advantages that, solved the problems, such as from root producer summer storage it is difficult.Meanwhile
Solidification temperature is low, and the time is short, greatly reduces the energy consumption of magnet ring coating process；It is a further object of the present invention to provide a kind of two steps
Method low temperature consolidates the preparation method of magnet ring special powder soon.
Unresolved above mentioned problem, the technical solution adopted by the present invention are as follows：
A kind of two-step method low temperature consolidates magnet ring special powder soon includes A material master batches and B material master batches, and its raw material forms respectively such as
Under：
A expects master batch
Modified epoxy 30-40 parts
Curing agent 2-5 parts
Fire retardant 10-20 parts
Filler 0-5 parts
Pigment 1-5 parts
Levelling agent 1-3 parts
B expects master batch
Modified epoxy 25-30 parts
Curing accelerator 1-2 parts
Defoamer 1-3 parts
Antioxidant 1-3 parts
Brightener 1-3 parts.
Preferably, the modified epoxy is o-cresol formaldehyde modified epoxy, and epoxide equivalent is respectively 180-210g/
Addition mass ratio in eg, 720-850g/eg, A material master batch is 7:Addition mass ratio in 1, B material master batch is 4:1.
Preferably, described curing agent selects promoted type dicy-curing agent.
Preferably, the fire retardant is the mixture of aluminium hydroxide and sepiolite micro mist, compound proportion 1:1.
Preferably, the filler selects superfine light calcium carbonate, the mesh of mesh number 2000 or so.
Preferably, the pigment is high temperature resistant, anti-ultraviolet ageing, resistance to dynamo oil, the high-carbon black pigment of chemical-resistant resistance, titanium
White powder, permanent bordeaux, permanent yellow, phthalocyanine blue, phthalocyanine green.
Preferably, the curing accelerator is the derivative of 2- heptadecyl imidazoles, and facilitation effect is fairly obvious, can be very big
The shortening hardening time of degree.
Preferably, the defoamer selects styrax.
Preferably, the levelling agent is a kind of stearic amide, from the W-1 of South Sea chemistry, can partly substitute styrax,
And there is synergy with styrax collocation.
Preferably, described brightener is the copolymer of a kind of butyl acrylate and methyl methacrylate, and it is to resin
There is good wetting effect with color stuffing, reduce melt viscosity, adjust surface tension, play bright levelling effect.
Above-mentioned two-step method low temperature consolidates the preparation method of magnet ring special powder soon, it is characterised in that：Using it is connected in order as
Lower step：
The preparation of A material
(1), by the o-cresol formaldehyde modified epoxy in mass ratio 7 of two kinds of different epoxide equivalents:1 weighs corresponding weight
Number is added in homogenizer, and promoted type dicy-curing agent weighs corresponding parts by weight and is added to homogenizer
In, 10min is stirred with 800~900r/min, the two is sufficiently mixed uniformly；
(2), by aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) and sepiolite micro mist (about 2 μm of particle diameter, city
Sell) by 1:1 ratio weighs corresponding number and put into homogenizer with 800~900r/min stirring 10min, then adds
Filler, pigment, levelling agent continue to stir 10min with 800~900r/min, make it well mixed；
(3), the mixture of step (1) and step (2) twin-screw melting extrusion, is melted respectively by A, B feeding bin feeding
Melt 80-90 DEG C of section temperature, 100-120 DEG C of head extrusion temperature, melting extrusion mixture is in blocks by chilling roller extruding, air-cooled rear powder
It is A material master batches to be broken into small fragment.
The preparation of B material
(4), by the o-cresol formaldehyde modified epoxy in mass ratio 4 of two kinds of different epoxide equivalents:1 weighs corresponding weight
Number is added in homogenizer, then weighs the derivative of the curing accelerator 2- heptadecyl imidazoles of respective quality number
It is added thereto, 10min is stirred with 800~900r/min, then sequentially adds the defoamer, antioxidant, light of corresponding parts by weight
Bright dose is continued to stir 10min with 800~900r/min, is well mixed.
(5) mixture of step (4), is passed through into twin-screw melting extrusion, 70-80 DEG C of melt zone temperature, head extrusion temperature
100-110 DEG C of degree, melting extrusion mixture is in blocks by chilling roller extruding, and it is B material master batches that small fragment is ground into after air-cooled.
(6), 90-95 in mass ratio:5-10 weighs A material master batches and B material master batches, passes through A, B feeding bin feeding, double spiral shells respectively
Bar melting extrusion, 80-90 DEG C of melt zone temperature, 100-120 DEG C of head extrusion temperature；
(7), melting extrusion mixture is in blocks by chilling roller extruding, and small fragment is ground into after cooling, is milled by air
Then essence obtains 140 mesh powders by cyclone separator and screen cloth, finally goes the removal of impurity by magnetic separation, obtain into powder
Product powder.
Above-mentioned preparation method has the lifting of matter to the dispersiveness of material, is prepared using two-step method so that addition is seldom
Auxiliary agent also can be highly uniform it is scattered in the material, give full play to the effect of auxiliary agent.
The NM technology of the present invention is with reference to prior art.
Two-step method low temperature of the present invention consolidates magnet ring special powder soon, solves in one-step method preparation process mixture in twin-screw
The phenomenon of middle precrosslink, finished powder is uniformly distributed due to each composition, in the absence of intermolecular interfacial effect, bin stability
It is very good, 70 days mobility can be kept substantially unchanged in 35 DEG C of environment, the difficulty for thoroughly solving the transport of summer high temperature weather,
The use environment of magnet ring special powder is relaxed, the powder coating effect is good in addition, and performance is excellent, halogen-free flameproof, and market is very wide
It is general.
Embodiment
In order to further appreciate that the present invention, it is illustrated with reference to specific embodiment, but the content of embodiment does not have
It is limited.
Embodiment 1
It is as follows that two-step method low temperature consolidates magnet ring special powder its raw material composition soon：
A material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 28
Part, 4 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing agent promotes
2 parts of type dicyandiamide P104 (resolution), 5 parts of aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) are micro- with sepiolite
5 parts of powder (about 2 μm of particle diameter, commercially available), 5 parts of superfine light calcium carbonate (Jiangxi is auspicious greatly), pigment (phthalocyanine green, permanent yellow, high pigment charcoal
Black, titanium dioxide is adjusted according to actual color and matched) 2 parts, 1 part of levelling agent W-1 (South Sea chemistry).Number described above is parts by weight
Number.
B material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 20
Part, 5 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing accelerator
1 part of PN-23J (aginomoto), 1 part of styrax, 1 part of antioxidant 445 (Chemtura), 1 part of brightener BLC701 (South Sea chemistry).With
The upper number is parts by weight.
A expects：90 parts, B expects 10 parts, and the number is parts by weight.
Above-mentioned two-step method low temperature consolidates the preparation method of magnet ring special powder, including following steps connected in order soon：
(1), by two o-cresol formaldehyde modified epoxies 208 and o-cresol formaldehyde modified epoxy KD-213H in mass ratio
7:1, which weighs corresponding parts by weight, is added in homogenizer, and promoted type dicy-curing agent weighs corresponding parts by weight
It is added in homogenizer, 10min is stirred with 800~900r/min, the two is sufficiently mixed uniformly；
(2), by aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) and sepiolite micro mist (about 2 μm of particle diameter, city
Sell) by 1:1 ratio weighs corresponding number and put into homogenizer with 800~900r/min stirring 10min, then adds
Superfine light calcium carbonate, pigment, W-1 continue to stir 10min with 800~900r/min, make it well mixed；
(3), the mixture of step (1) and step (2) twin-screw melting extrusion, is melted respectively by A, B feeding bin feeding
Melt 80-90 DEG C of section temperature, 100-120 DEG C of head extrusion temperature, melting extrusion mixture is in blocks by chilling roller extruding, air-cooled rear powder
It is A material master batches to be broken into small fragment.
(4), by two o-cresol formaldehyde modified epoxies 208 and o-cresol formaldehyde modified epoxy KD-213H in mass ratio
4:1, which weighs corresponding parts by weight, is added in homogenizer, then weighs the curing accelerator PN- of respective quality number
23J is added thereto, with 800~900r/min stir 10min, then sequentially add corresponding parts by weight styrax, 445,
BLC701 continues to stir 10min with 800~900r/min, is well mixed.
(5) mixture of step (4), is passed through into twin-screw melting extrusion, 70-80 DEG C of melt zone temperature, head extrusion temperature
100-110 DEG C of degree, melting extrusion mixture is in blocks by chilling roller extruding, and it is B material master batches that small fragment is ground into after air-cooled.
(6), 90-95 in mass ratio:5-10 weighs A material master batches and B material master batches, passes through A, B feeding bin feeding, double spiral shells respectively
Bar melting extrusion, 80-90 DEG C of melt zone temperature, 100-120 DEG C of head extrusion temperature；
(7), melting extrusion mixture is in blocks by chilling roller extruding, and small fragment is ground into after cooling, is milled by air
Then essence obtains 140 mesh powders by cyclone separator and screen cloth, finally goes the removal of impurity by magnetic separation, obtain into powder
Product powder.After tested, indices are included in table 1.
Embodiment 2
The step of with embodiment 1, difference are that the composition parts by weight of each raw material are as follows：
A material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 35
Part, 5 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing agent promotes
5 parts of type dicyandiamide P104 (resolution), 10 parts of aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) and sepiolite
10 parts of micro mist (about 2 μm of particle diameter, commercially available), (phthalocyanine green, permanent yellow, high-carbon black pigment, titanium dioxide adjust pigment according to actual color
Proportioning) 5 parts, 2 parts of levelling agent W-1 (South Sea chemistry).Number described above is parts by weight.
B material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 24
Part, 6 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing accelerator
2 parts of PN-23J (aginomoto), 3 parts of styrax, 3 parts of antioxidant 445 (Chemtura), 3 parts of brightener BLC701 (South Sea chemistry).With
The upper number is parts by weight.
A expects：95 parts, B expects 5 parts, and the number is parts by weight.
Embodiment 3
The step of with embodiment 1, difference are that the composition parts by weight of each raw material are as follows：
A material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg)
26.25 parts, 3.75 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), Gu
3 parts of agent promoted type dicyandiamide P104 (resolution), 8 parts of aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) with
8 parts of sepiolite micro mist (about 2 μm of particle diameter, commercially available), 3 parts of superfine light calcium carbonate (Jiangxi is auspicious greatly), pigment (phthalocyanine green, permanent yellow,
High-carbon black pigment, titanium dioxide are adjusted according to actual color and matched) 3 parts, 1 part of levelling agent W-1 (South Sea chemistry).Number described above
For parts by weight.
B material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg)
22.4 parts, 5.6 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), solidification
2 parts of accelerator PN-23J (aginomoto), 2 parts of styrax, 2 parts of antioxidant 445 (Chemtura), brightener BLC701 (South Sea chemistry)
2 parts.Number described above is parts by weight.
A expects：93 parts, B expects 7 parts, and the number is parts by weight.
Embodiment 4
The step of with embodiment 1, difference are that the composition parts by weight of each raw material are as follows：
A material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 28
Part, 4 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing agent promotes
4 parts of type dicyandiamide P104 (resolution), 7 parts of aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) are micro- with sepiolite
7 parts of powder (about 2 μm of particle diameter, commercially available), 5 parts of superfine light calcium carbonate (Jiangxi is auspicious greatly), pigment (phthalocyanine green, permanent yellow, high pigment charcoal
Black, titanium dioxide is adjusted according to actual color and matched) 3 parts, 2 parts of levelling agent W-1 (South Sea chemistry).Number described above is parts by weight
Number.
B material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 24
Part, 6 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing accelerator
2 parts of PN-23J (aginomoto), 2 parts of styrax, 2 parts of antioxidant 445 (Chemtura), 2 parts of brightener BLC701 (South Sea chemistry).With
The upper number is parts by weight.
A expects：94 parts, B expects 6 parts, and the number is parts by weight.
Embodiment 5
The step of with embodiment 1, difference are that the composition parts by weight of each raw material are as follows：
A material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg)
26.25 parts, 3.75 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), Gu
2 parts of agent promoted type dicyandiamide P104 (resolution), 10 parts of aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available)
With 10 parts of sepiolite micro mist (about 2 μm of particle diameter, commercially available), 5 parts of superfine light calcium carbonate (Jiangxi is auspicious greatly), pigment (phthalocyanine green, is consolidated forever
Huang, high-carbon black pigment, titanium dioxide are adjusted according to actual color and matched) 3 parts, 3 parts of levelling agent W-1 (South Sea chemistry).It is described above
Number is parts by weight.
B material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 20
Part, 5 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing accelerator
1.5 parts of PN-23J (aginomoto), 1 part of styrax, 2 parts of antioxidant 445 (Chemtura), 2 parts of brightener BLC701 (South Sea chemistry).
Number described above is parts by weight.
A expects：95 parts, B expects 5 parts, and the number is parts by weight.
Embodiment 6
The step of with embodiment 1, difference are that the composition parts by weight of each raw material are as follows：
A material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 35
Part, 5 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing agent promotes
4 parts of type dicyandiamide P104 (resolution), 10 parts of aluminium hydroxide (silane pre-treatment, 2~3 μm of particle diameter are commercially available) and sepiolite
10 parts of micro mist (about 2 μm of particle diameter, commercially available), 2 parts of superfine light calcium carbonate (Jiangxi is auspicious greatly), pigment (phthalocyanine green, permanent yellow, high color
Plain carbon black, titanium dioxide are adjusted according to actual color and matched) 1 part, 2 parts of levelling agent W-1 (South Sea chemistry).Number described above is attached most importance to
Measure number.
B material master batches, which form, is：O-cresol formaldehyde modified epoxy 208 (sinopec, epoxide equivalent 180-210g/eg) 24
Part, 6 parts of o-cresol formaldehyde modified epoxy KD-213H (national capital chemical industry, epoxide equivalent 720-850g/eg), curing accelerator
2 parts of PN-23J (aginomoto), 3 parts of styrax, 2 parts of antioxidant 445 (Chemtura), 3 parts of brightener BLC701 (South Sea chemistry).With
The upper number is parts by weight.
A expects：90 parts, B expects 10 parts, and the number is parts by weight.
Table 1
Claims (7)
1. a kind of two-step method low temperature consolidates magnet ring special powder soon, it is characterised in that：Its raw material composition is female comprising A material master batches and B material
Grain.
2. a kind of two-step method low temperature according to claim 1 consolidates magnet ring special powder soon, it is characterised in that：A expect master batch by
The raw material composition of following parts by weight：
Modified epoxy 30-40 parts
Curing agent 2-5 parts
Fire retardant 10-20 parts
Filler 0-5 parts
Pigment 1-5 parts
Levelling agent 1-3 parts
3. a kind of two-step method low temperature according to claim 2 consolidates magnet ring special powder soon, it is characterised in that：Described modification
Epoxy resin is the o-cresol formaldehyde modified epoxy of two kinds of different epoxide equivalents, and its mass ratio is 7：1.
Described curing agent is dicy-curing agent, and dicyandiamide is promoted type dicyandiamide.
Described fire retardant is the mixture of aluminium hydroxide and sepiolite micro mist, compound proportion 1:1.
Described filler is superfine light calcium carbonate, the mesh of mesh number 2000.
Described pigment is high temperature resistant, anti-ultraviolet ageing, resistance to dynamo oil, the high-carbon black pigment of chemical-resistant resistance, titanium dioxide, forever solid
Red, permanent yellow, phthalocyanine blue, phthalocyanine green.
Described levelling agent is the homopolymer of butyl acrylate.
4. a kind of two-step method low temperature according to claim 1 consolidates magnet ring special powder soon, it is characterised in that：B expect master batch by
The raw material composition of following parts by weight：
Modified epoxy 25-30 parts
Curing accelerator 1-2 parts
Defoamer 1-3 parts
Antioxidant 1-3 parts
Brightener 1-3 parts
5. a kind of two-step method low temperature according to claim 4 consolidates magnet ring special powder soon, it is characterised in that：Described modification
Epoxy resin is the o-cresol formaldehyde modified epoxy of two kinds of different epoxide equivalents, and its mass ratio is 4：1.
Described curing accelerator is the derivative of 2- heptadecyl imidazoles.
Described defoamer is styrax.
Described antioxidant is secondary aryl amine kind antioxidant.
Described brightener butyl acrylate and the copolymer of methyl methacrylate.
6. a kind of two-step method low temperature according to claim 1 consolidates magnet ring special powder soon, it is characterised in that：Described A material
Expect that addition mass ratio is 90-95 with B:5-10.
7. prepare a kind of two-step method low temperature as any one of claim 1-6 consolidates magnet ring special powder soon, its feature exists
In the step of connecting comprising order below：
The preparation of A material
(1), by the o-cresol formaldehyde modified epoxy in mass ratio 7 of two kinds of different epoxide equivalents:1 weighs corresponding parts by weight
It is added in homogenizer, promoted type dicy-curing agent weighs corresponding parts by weight and is added in homogenizer, with
800~900r/min stirs 10min, the two is sufficiently mixed uniformly；
(2) aluminium hydroxide and sepiolite micro mist, are pressed 1:1 ratio weighs corresponding number and put into homogenizer with 800
~900r/min stirs 10min, then adds filler, pigment, levelling agent and continues to stir 10min with 800~900r/min, makes it
It is well mixed；
(3) mixture of step (1) and step (2), is passed through into A, B feeding bin feeding, twin-screw melting extrusion, melt zone respectively
80-90 DEG C of temperature, 100-120 DEG C of head extrusion temperature, melting extrusion mixture is in blocks by chilling roller extruding, is ground into after air-cooled
Small fragment is A material master batches；
The preparation of B material
(4), by the o-cresol formaldehyde modified epoxy in mass ratio 4 of two kinds of different epoxide equivalents:1 weighs corresponding parts by weight
It is added in homogenizer, the derivative for then weighing the curing accelerator 2- heptadecyl imidazoles of respective quality number adds
Wherein, 10min is stirred with 800~900r/min, then sequentially adds the defoamer, antioxidant, brightener of corresponding parts by weight
Continue to stir 10min with 800~900r/min, be well mixed；
(5) mixture of step (4), is passed through into twin-screw melting extrusion, 70-80 DEG C of melt zone temperature, head extrusion temperature
100-110 DEG C, melting extrusion mixture is in blocks by chilling roller extruding, and it is B material master batches that small fragment is ground into after air-cooled；
(6), 90-95 in mass ratio:5-10 weighs A material master batches and B material master batches, is melted respectively by A, B feeding bin feeding, twin-screw
Melt extrusion, 80-90 DEG C of melt zone temperature, 100-120 DEG C of head extrusion temperature；
(7), melting extrusion mixture is in blocks by chilling roller extruding, and small fragment is ground into after cooling, by air be milled it is pure into
Powder, 140 mesh powders then are obtained by cyclone separator and screen cloth, finally go the removal of impurity by magnetic separation, obtain finished powder
End.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110105847A (en) * | 2019-05-31 | 2019-08-09 | 咸阳辉煌电子磁性材料研究所 | A kind of epoxide powder coating and preparation method thereof |
| CN110136923A (en) * | 2019-05-31 | 2019-08-16 | 咸阳辉煌电子磁性材料研究所 | A kind of amorphous nano-crystalline magnet ring of epoxy powder coating and preparation method thereof |
| CN111234659A (en) * | 2020-01-16 | 2020-06-05 | 安徽真信涂料有限公司 | Electrical insulation powder coating for magnetic ring copper bar |
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| CN103059692A (en) * | 2013-01-23 | 2013-04-24 | 天津市凯华绝缘材料有限公司 | Epoxy powder coating for coating magnet ring and preparation method of epoxy powder coating |
| CN104745048A (en) * | 2013-12-31 | 2015-07-01 | 天津市凯华绝缘材料有限公司 | Halogen-free flame retardant epoxy resin powder coating used for coating magnetic ring |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103059692A (en) * | 2013-01-23 | 2013-04-24 | 天津市凯华绝缘材料有限公司 | Epoxy powder coating for coating magnet ring and preparation method of epoxy powder coating |
| CN104745048A (en) * | 2013-12-31 | 2015-07-01 | 天津市凯华绝缘材料有限公司 | Halogen-free flame retardant epoxy resin powder coating used for coating magnetic ring |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110105847A (en) * | 2019-05-31 | 2019-08-09 | 咸阳辉煌电子磁性材料研究所 | A kind of epoxide powder coating and preparation method thereof |
| CN110136923A (en) * | 2019-05-31 | 2019-08-16 | 咸阳辉煌电子磁性材料研究所 | A kind of amorphous nano-crystalline magnet ring of epoxy powder coating and preparation method thereof |
| CN111234659A (en) * | 2020-01-16 | 2020-06-05 | 安徽真信涂料有限公司 | Electrical insulation powder coating for magnetic ring copper bar |
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