CN110194923A - A kind of cold-hot sudden turn of events insulating powder and preparation method thereof - Google Patents
A kind of cold-hot sudden turn of events insulating powder and preparation method thereof 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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- 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
- 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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- 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
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention discloses a kind of cold-hot sudden turn of events coating material of insulating powder in use and preparation method thereof, its raw material includes following components by weight percent: modified epoxy A:15%-20%, modified epoxy B:25%-30%, curing agent: 15%-20%, filler: 20%-30%, fire retardant: 5%-10%, pigment: 0.1%-0.3%, auxiliary agent: 0.5%-0.8%, wherein curing agent is the polyphenol of N- alkyl imines grafting, belong to novel phenols curing agent, the percentage composition is the percentage composition of total amount, cold-hot sudden turn of events insulating powder of the present invention overcomes the shortcomings that conventional epoxy insulating powder cracks in the presence of a harsh environment, in high-speed rail, military industry field and artificial intelligence field are widely used, mechanical performance is excellent to can satisfy tank, unmanned plane, the military production such as robot The use of product in the extreme circumstances, while there is high flame retardant.
Description
Technical field
The present invention relates to a kind of cold-hot sudden turn of events insulating powders and preparation method thereof, belong to functional coating field.
Background technique
Military project articles are often faced with extremely severe use environment, at the same as tank gun barrel inner wall etc. also to face it is powerful
Shock wave and corrosivity from gunpowder, this is just high to the coating needs on substrate, in the market the insulation of common epoxies
Powder has a cracking risk under low State of Air Temperature, and it is the cold and hot sudden turn of events of temperature that shell transmitting front and back gun barrel wall surface, which faces, this
Conventional insulation powder almost all cracking falls off under the conditions of kind, and the connection row of the train bottom in rail traffic similarly is same
It is faced with the cold and hot sudden turn of events problem of temperature, while also needing there are higher stress levels within the scope of the shallow layer of prescribed requirement,
These harsh standards significantly limit powdery paints in the application in these fields.So prepare one kind can satisfy it is above-mentioned
It is required that coating material of insulating powder in use it is very necessary.
Summary of the invention
The object of the present invention is to provide a kind of insulating powder of cold-hot sudden turn of events, mechanical performance with higher is higher
Stress levels and higher flame retardant rating fundamentally solve the problems, such as that insulating powder cracks in the presence of a harsh environment, realize
Scumbling connection comes the application in rail traffic, realize powdery paints the military projects such as gun barrel inner wall, unmanned plane, robot,
The application of artificial intelligence field；It is a further object to provide a kind of preparation methods of cold-hot sudden turn of events insulating powder.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of cold-hot sudden turn of events insulating powder, raw material include following components by weight percent:
Modified epoxy A:15%-20%；
Modified epoxy B: 25%-30%；
Curing agent 15%-20%；
Filler 20%-30%；
Fire retardant 5%-10%；
Pigment 0.1%-0.3%；
Auxiliary agent 0.5%-0.8%.
Preferably, the modified epoxy A is that aliphatic chain is grafted the modified based epoxy resin of o-cresol formaldehyde, and the resin is in neighbour
Aliphatic chain is introduced in cresol novolac epoxy resins strand, overcoming traditional o-cresol formaldehyde epoxy resin brittleness, easy monolith falls off by force
Defect, epoxide equivalent range 720-1000g/eg, 100-110 DEG C of softening point range.
Preferably, the modified epoxy B is that acrylonitrile butadiene rubber modified isocyanates is copolymerized epoxy resin, which first leads to
It crosses epoxy resin to obtain by acrylonitrile butadiene rubber modified again with isocyanates copolymerization, epoxide equivalent range 175-300g/eg, softening point
95-105 DEG C of range.The limitation for overcoming conventional epoxies softening point Yu epoxide equivalent positive correlation, realizes high softening-point
Low epoxide equivalent, the characteristic that high adhesion force, high-flexibility, high rigidity are runed counter to embody a concentrated reflection of.
Preferably, the curing agent selects the polyphenol of N- alkyl imines grafting, belongs to phenols curing agent, phenolic hydroxyl group
The hydroxyl equivalent 180-220g/eg of resin；The N- alkyl imines belongs to nitrogenous polynary ring knot similar with imidazoles
Structure characteristic makes it have both the characteristic of catalytic curing epoxy resin, and polyphenol itself there is solidification well to make epoxy resin
With the quantity of phenolic hydroxyl group determines its crosslink density to epoxy resin in molecular structure, imine modified more with N- alkyl
The crosslink density of epoxy resin has been performed to ultimate attainment, the product machine with super strength after solidification by the phenols curing agent that first phenol obtains
Tool performance.
Preferably, the filler is the ultra-fine barium sulfate of maleic acid glycosides grafted polyvinyl alcohol microencapsulation processing, mesh number
For -5000 mesh of 1500 mesh, untreated compared to tradition or conventional epoxies cladding solid packing has preferably compatible
Property, so that dispersibility is more uniform, while the flexibility of resin can be performed to ultimate attainment.
Preferably, fire retardant is the mixture of the processed montmorillonite micro mist of triphenyl phosphate, carbon nanotube compounding, compounding
Ratio 3:1,2-5 μm of partial size；Triphenyl phosphate processing be triphenyl phosphate is heated to 60 degree melt completely after be added it is multiple
Montmorillonite micro mist with ratio, carbon nanotube, high-speed stirred 5-8min are cooled to micro mist after solid-state；Triphenyl phosphate, which belongs to, to be contained
The organic compound of phosphorus, itself has preferable anti-flammability and plasticity, and the processed compound flame redundant of this method will be different
The fire retardant of type combines at different fire retardant mechanisms such as charcoal is good, gas phase is oxygen barrier, reduction combustion heat releases, by very big journey
The raising flame retardant effect of degree.
Preferably, the pigment be resistance to high temperature oxidation, resistance to machine oil, the permanent bordeaux of chemical-resistant resistance, permanent yellow, phthalocyanine blue,
One of phthalocyanine green, titanium dioxide or high-carbon black pigment are a variety of.
Preferably, the auxiliary agent is the mixture of brightener, levelling agent, antioxidant, electric agent, defoaming agent.
A method of cold-hot sudden turn of events insulating powder is prepared, using the following steps being connected in order:
(1) triphenyl phosphate for weighing certain mass is added in band heating function high-speed mixer, is heated to 60 degree to complete
Melting, puts into high-speed stirred according to 5 ~ 10% that 3:1 ratio weighs triphenyl phosphate weight for montmorillonite micro mist, carbon nanotube
5-8min is stirred with 800 ~ 900r/min in machine, is cooled to room temperature, taking-up grinds micro mist with air after the complete solidification of object to be mixed
Change；
(2) ultra-fine barium sulfate of maleic acid glycosides grafted polyvinyl alcohol microencapsulation processing is added to the mixture of step (1)
In, 10min is stirred with 800 ~ 900r/min；Then curing agent, brightener, levelling agent, antioxidant, electric agent, defoaming agent is added
Continue to stir 10min with 800 ~ 900r/min, mix them thoroughly uniformly；
(3) modified epoxy A, modified epoxy B, pigment are weighed into corresponding parts by weight and is added to high-speed mixer
In, 10min is stirred with 800 ~ 900r/min, is uniformly mixed resin particle；
(4) mixture in (2), (3) step is passed through into two automatic weighing feeding bin feedings respectively, twin-screw melting extrusion,
100-110 DEG C of melt zone temperature, 110-120 DEG C of head extrusion temperature lead to cooling water in twin-screw, and temperature control is stablized, will not be because of
Screw rod frictional heat is excessively high to there is micro- crosslinking phenomena；
(5) melting extrusion mixture squeezes in flakes by chilling roller, is ground into small fragment after cooling, by air milling essence at powder
Then end obtains 140 mesh powders by cyclone separator and sieve, finally remove impurity by magnetic separation, obtain finished powder.
Step (1) is to carry out pretreated process to compound flame redundant in the above charging process；Step (2) is by maleic acid
Ultra-fine barium sulfate, curing agent and the auxiliary agent of glycosides grafted polyvinyl alcohol microencapsulation processing are added in the high-speed mixer of (1)
High-speed stirred 8-10min carries out pre-dispersed；Modified epoxy A, modified epoxy B and pigment are added to not by step (3)
High-speed stirred 8-10min is carried out pre-dispersed in same high-speed mixer；Last base-material and filler are added from different loading hoppers to be squeezed
Machine out.
The side that extruder is added from a hopper is blended in the base-material filler that the charging process is different from traditional free of turn
Method: first is that base-material filler is separated feeding by automatic weighing feeding bin, it ensure that the stability of each component accounting, second is that will change
Property epoxy resin separately mixed with curing agent, prevent occurring micro- crosslinking phenomena during prolonged blended under agitation.
It is using the beneficial effect of technical solution of the present invention:
The distinctive flexibility of cold-hot sudden turn of events insulating powder of the present invention and fabulous mechanical performance have widened powdery paints significantly
Application field；The anti-flammability of superelevation, 0.3mm test piece can test V0 grades by UL-94, almost non-combustible, smoke amount pole when burning
It is small, it is rail traffic and the ideal new material of military industry field, in addition, cold-hot sudden turn of events insulating powder preparation method is simple, cost
It is cheap, it has a vast market foreground.
The powdery paints dispersing uniformity of above method preparation is obviously improved, and each ingredient is made to give full play to the effect of itself,
The unstable disadvantage of the storage of effective solution powdery paints simultaneously.
Specific embodiment
In order to further appreciate that the present invention, it is illustrated combined with specific embodiments below, but the content of embodiment does not have
It is limited.
Embodiment 1
A kind of cold-hot sudden turn of events insulating powder, raw material include following component:
Modified epoxy A(state all chemical industry customize) 15%, modified epoxy B(state all chemical industry customize) 35%, curing agent phenol hydroxyl
Base resin (the raw customization of orchid) 20%, ultra-fine barium sulfate (processing of maleic acid glycosides grafted polyvinyl alcohol microencapsulation, 2500 mesh) 20%,
Montmorillonite micro mist (making every effort to open up) and carbon nanotube (South Korea's import) 10%(mass ratio 3:1), pigment (phthalocyanine green, high-carbon black pigment, titanium
White powder is adjusted according to actual color and is matched) 0.1%, auxiliary agent (brightener, levelling agent, antioxidant, electric agent, defoaming agent) according to
The 0.5% of total amount is added, and the percentage composition is the percentage composition of total amount.
Modified epoxy A is that aliphatic chain is grafted the modified based epoxy resin of o-cresol formaldehyde, and the resin is in o-cresol formaldehyde epoxy
Aliphatic chain is introduced in molecular resin chain, traditional o-cresol formaldehyde epoxy resin brittleness is overcome and is easy the defect that monolith falls off, ring by force
Oxygen equivalent weight range 720-1000g/eg, 100-110 DEG C of softening point range.
Modified epoxy B is that acrylonitrile butadiene rubber modified isocyanates is copolymerized epoxy resin, which first passes through epoxy resin
It is obtained again by acrylonitrile butadiene rubber modified with isocyanates copolymerization, epoxide equivalent range 175-300g/eg, softening point range 95-105
℃。
Curing agent selects the polyphenol of N- alkyl imines grafting, belongs to phenols curing agent, the hydroxyl of phenolic hydroxyl group resin
Equivalent 180-220g/eg.
Montmorillonite micro mist and the partial size of carbon nanotube are 2-5 μm, triphenyl phosphate processing.
The preparation method of above-mentioned cold-hot sudden turn of events insulating powder, including the following steps being connected in order:
1. the triphenyl phosphate for weighing certain mass is added in band heating function high-speed mixer, 60 degree are heated to completely molten
Melt, montmorillonite micro mist, carbon nanotube are put into high-speed mixer according to 5 ~ 10% that 3:1 ratio weighs triphenyl phosphate weight
In with 800 ~ 900r/min stir 5-8min, be cooled to room temperature, after the complete solidification of object to be mixed taking-up with air grind be micronized；
2. the ultra-fine barium sulfate of maleic acid glycosides grafted polyvinyl alcohol microencapsulation processing to be added to the mixture of step (1)
In, 10min is stirred with 800 ~ 900r/min；Then curing agent, brightener, levelling agent, antioxidant, electric agent, defoaming agent is added
Continue to stir 10min with 800 ~ 900r/min, mix them thoroughly uniformly；
3. modified epoxy A, modified epoxy B, pigment are weighed corresponding percentage composition and are added in high-speed mixer,
10min is stirred with 800 ~ 900r/min, is uniformly mixed resin particle；
4. mixture 2., 3. in step is passed through two automatic weighing feeding bin feedings, twin-screw melting extrusion, melting respectively
Duan Wendu 100-110 DEG C, 110-120 DEG C of head extrusion temperature lead to cooling water in twin-screw, and temperature control is stablized, will not be because of screw rod
Frictional heat is excessively high to there is micro- crosslinking phenomena；
5. melting extrusion mixture squeezes in flakes by chilling roller, it is ground into small fragment after cooling, by air milling essence at powder
Then end obtains 140 mesh powders by cyclone separator and sieve, finally remove impurity by magnetic separation, obtain finished powder；
After tested, indices are included in table 1.
Embodiment 2
The step of with embodiment 1, the difference is that the composition parts by weight of each raw material are fixed for modified epoxy A(state all chemical industry
System) 20%, modified epoxy B(state all chemical industry customize) 30%, curing agent phenolic hydroxyl group resin (the raw customization of orchid) 15%, ultra-fine sulfuric acid
Barium (processing of maleic acid glycosides grafted polyvinyl alcohol microencapsulation, 2000 mesh) 25%, montmorillonite micro mist (making every effort to open up) and carbon nanotube
(South Korea's import) 5%(mass ratio 3:1), pigment (permanent bordeaux, high-carbon black pigment, titanium dioxide are adjusted according to actual color and matched)
0.1%, auxiliary agent (brightener, levelling agent, antioxidant, electric agent agent, defoaming agent) is added according to the 0.5 of total amount, and the percentage contains
Amount is the percentage composition of total amount.
The preparation method is the same as that of Example 1 in embodiment 2.
After tested, indices are included in table 1.
Embodiment 3
The step of with embodiment 1, the difference is that the composition parts by weight of each raw material are fixed for modified epoxy A(state all chemical industry
System) 20%, modified epoxy B(state all chemical industry customize) 35%, curing agent phenolic hydroxyl group resin (the raw customization of orchid) 15%, ultra-fine sulfuric acid
Barium (processing of maleic acid glycosides grafted polyvinyl alcohol microencapsulation, 2000 mesh) 30%, montmorillonite micro mist (making every effort to open up) and carbon nanotube
(South Korea's import) 0%, pigment (phthalocyanine blue, high-carbon black pigment, titanium dioxide are adjusted according to actual color and matched) 0.3%, auxiliary agent is (bright
Agent, levelling agent, antioxidant, electric agent, defoaming agent) it is added according to the 0.8% of total amount, the percentage composition is the percentage of total amount
Content.
The preparation method is the same as that of Example 1 in embodiment 3.
After tested, indices are included in table 1.
Embodiment 4
The step of with embodiment 1, the difference is that the composition parts by weight of each raw material are fixed for modified epoxy A(state all chemical industry
System) 15%, modified epoxy B(state all chemical industry customize) 30%, curing agent phenolic hydroxyl group resin (the raw customization of orchid) 20%, ultra-fine sulfuric acid
Barium (processing of maleic acid glycosides grafted polyvinyl alcohol microencapsulation, 2000 mesh) 25%, montmorillonite micro mist (making every effort to open up) and carbon nanotube
(South Korea's import) 10%, pigment (permanent yellow, high-carbon black pigment, titanium dioxide are adjusted according to actual color and matched) 0.2%, auxiliary agent (light
Bright dose, levelling agent, antioxidant, electric agent, defoaming agent) it is added according to the 0.6% of total amount, the percentage composition is the hundred of total amount
Divide content.
The preparation method is the same as that of Example 1 in embodiment 4.
After tested, indices are included in table 1.
Embodiment 5
The step of with embodiment 1, the difference is that the composition parts by weight of each raw material are fixed for modified epoxy A(state all chemical industry
System) 15%, modified epoxy B(state all chemical industry customize) 30%, curing agent phenolic hydroxyl group resin (the raw customization of orchid) 15%, ultra-fine sulfuric acid
Barium (processing of maleic acid glycosides grafted polyvinyl alcohol microencapsulation, 2000 mesh) 30%, montmorillonite micro mist (making every effort to open up) and carbon nanotube
(South Korea's import) 10%, pigment (phthalocyanine green, high-carbon black pigment, titanium dioxide are adjusted according to actual color and matched) 0.2%, auxiliary agent (light
Bright dose, levelling agent, antioxidant, electric agent, defoaming agent) it is added according to the 0.8% of total amount, the percentage composition is the hundred of total amount
Divide content.
The preparation method is the same as that of Example 1 in embodiment 5.
After tested, indices are included in table 1.
Embodiment 6
The step of with embodiment 1, the difference is that the composition parts by weight of each raw material are fixed for modified epoxy A(state all chemical industry
System) 18%, modified epoxy B(state all chemical industry customize) 32%, curing agent phenolic hydroxyl group resin (the raw customization of orchid) 18%, ultra-fine sulfuric acid
Barium (processing of maleic acid glycosides grafted polyvinyl alcohol microencapsulation, 2000 mesh) 24%, montmorillonite micro mist (making every effort to open up) and carbon nanotube
(South Korea's import) 8%, pigment (phthalocyanine green, high-carbon black pigment, titanium dioxide are adjusted according to actual color and matched) 0.3%, auxiliary agent is (bright
Agent, levelling agent, antioxidant, electric agent, defoaming agent) it is added according to the 0.8% of total amount, the percentage composition is the percentage of total amount
Content.
The preparation method is the same as that of Example 1 in embodiment 6.
After tested, indices are included in table 1.
Table 1
| Test item | Test method | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Gel time | GB/T6554-2003 | /s | 30 | 40 | 40 | 30 | 40 | 35 |
| Mobility | GB/T21782.5-2010 | φ/mm | 18.1 | 18 | 18 | 17.6 | 17 | 17.8 |
| Adhesive force | GB/T9286-1998 | / grade | 0 grade | Better than 0 grade | Better than 0 grade | 0 grade | 0 grade | Better than 0 grade |
| Hardness | GB/T6739-2006 | <H | H | <H | 2H | 2H | 2H | |
| Flexibility | GB/T1731-1993 | /mm | ≤0.2 | ≤0.4 | ≤0.2 | ≤0.6 | ≤0.6 | ≤0.6 |
| Impact resistant strength | GB/T1732-1993 | /kg/cm | ≥50 | ≥50 | ≥50 | ≥50 | ≥50 | ≥50 |
| Corner coverage | GB/T6554-2003 | /% | 55 | 55 | 55 | 60 | 58 | 60 |
| Compressive resistance | GB/T1408.1-2006 | /kv/mm | 45 | 45 | 45 | 45 | 45 | 45 |
| Flame retardant rating | UL-94,0.3mm test piece | / grade | V-0 | V-1 | V-2 | V-0 | V-0 | V-0 |
| Resistance to methylene chloride | It analyzes pure | 800h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | |
| Resistance to hydrochloric acid | 5% concentration | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | |
| Resistance to sodium hydroxide | 5% concentration | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged | 1000h is unchanged |
The mesh number of ultra-fine barium sulfate powder is -5000 mesh of 1500 mesh in embodiment 1-6, is preferably 2500 mesh in the present invention, remaining
Suitable mesh number (such as " 1500 mesh, 3000 mesh, 4000 mesh, 5000 mesh ") each falls within protection scope of the present invention.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of cold-hot sudden turn of events insulating powder, which is characterized in that its raw material includes following components by weight percent:
Modified epoxy A:15%-20%；
Modified epoxy B: 25%-30%；
Curing agent 15%-20%；
Filler 20%-30%；
Fire retardant 5%-10%；
Pigment 0.1%-0.3%；
Auxiliary agent 0.5%-0.8%.
2. a kind of cold-hot sudden turn of events insulating powder according to claim 1, it is characterised in that: the modified epoxy A
It is grafted the modified based epoxy resin of o-cresol formaldehyde for aliphatic chain, which introduces fat in o-cresol formaldehyde epoxy resin strand
Chain overcomes traditional o-cresol formaldehyde epoxy resin brittleness and is easy the defect that monolith falls off, epoxide equivalent range 720-900g/ by force
Eg, 100-110 DEG C of softening point range.
3. a kind of cold-hot sudden turn of events insulating powder according to claim 1, it is characterised in that: the modified epoxy B
It is copolymerized epoxy resin for acrylonitrile butadiene rubber modified isocyanates, which first passes through epoxy resin and isocyanates copolymerization passes through fourth again
Nitrile rubber modification obtains, and epoxide equivalent range 175-300g/eg, overcomes conventional epoxies by 95-105 DEG C of softening point range
The limitation of softening point and epoxide equivalent positive correlation realizes the low epoxide equivalent of high softening-point, by high adhesion force, high-flexibility,
The characteristic concentrated reflection that high rigidity is runed counter to.
4. a kind of cold-hot sudden turn of events insulating powder according to claim 1, it is characterised in that: the curing agent selects N- alkane
The polyphenol of base cycloheximide grafting, belongs to novel phenols curing agent, the hydroxyl equivalent 180-220g/eg of phenolic hydroxyl group resin；Institute
The N- alkyl imines stated belongs to nitrogenous polynary ring architectural characteristic similar with imidazoles and it is made to have both catalytic curing epoxy
The characteristic of resin, polyphenol itself have good solidification to epoxy resin, and the quantity of phenolic hydroxyl group determines in molecular structure
Its crosslink density to epoxy resin, the phenols curing agent obtained with N- alkyl imine modified polyphenol is by epoxy resin
Crosslink density performed to ultimate attainment, the product mechanical performance with super strength after solidification.
5. cold-hot sudden turn of events coating material of insulating powder in use according to claim 1, it is characterised in that: the filler is that maleic acid glycosides connects
Branch polyvinyl alcohol microencapsulation processing ultra-fine barium sulfate, mesh number be -5000 mesh of 1500 mesh, compared to tradition it is untreated or
The solid packing of conventional epoxies cladding has better compatibility, so that dispersibility is more uniform, while can be resin
Flexibility perform to it is ultimate attainment.
6. cold-hot sudden turn of events coating material of insulating powder in use according to claim 1, it is characterised in that: fire retardant is at triphenyl phosphate
The mixture that the montmorillonite micro mist managed is compounded with carbon nanotube, compound proportion 3:1,2-5 μm of partial size；The processing method improves
The compatibility of fire retardant and resin, while by carbon nanotube whiteness, carbon nanotube is state-of-the art fire retardant, because of self color
Problem limits its scope of application, and will greatly improve its versatility and anti-flammability after whitenessization processing.
7. cold-hot sudden turn of events coating material of insulating powder in use according to claim 6, it is characterised in that: the triphenyl phosphate, which is handled, is
By triphenyl phosphate be heated to 60 degree melt completely after the montmorillonite micro mist of compound proportion, carbon nanotube, high-speed stirred 5- is added
8min is cooled to micro mist after solid-state；Triphenyl phosphate belongs to phosphorous organic compound, itself has preferable anti-flammability and increasing
Plasticity, the processed compound flame redundant of this method is by different types of fire retardant at charcoal is good, gas phase is oxygen barrier, reduces and burns
The different fire retardant mechanisms such as heat release combine, by the raising flame retardant effect of high degree.
8. a kind of cold-hot sudden turn of events insulating powder according to claim 1, it is characterised in that: the pigment is oxygen resistant to high temperatures
One of change, resistance to machine oil, the permanent bordeaux of chemical-resistant resistance, permanent yellow, phthalocyanine blue, phthalocyanine green, titanium dioxide or high-carbon black pigment
Or it is a variety of.
9. a kind of cold-hot sudden turn of events insulating powder according to claim 1, it is characterised in that: the auxiliary agent be brightener,
Levelling agent, antioxidant, electric agent, defoaming agent mixture.
10. the method for preparing the cold-hot sudden turn of events insulating powder as described in any one of claim 1-9, it is characterised in that:
Using the following steps being connected in order:
(1) triphenyl phosphate for weighing certain mass is added in band heating function high-speed mixer, is heated to 60 degree to complete
Melting, puts into high-speed stirred according to 5 ~ 10% that 3:1 ratio weighs triphenyl phosphate weight for montmorillonite micro mist, carbon nanotube
5-8min is stirred with 800 ~ 900r/min in machine, is cooled to room temperature, taking-up grinds micro mist with air after the complete solidification of object to be mixed
Change；
(2) ultra-fine barium sulfate of maleic acid glycosides grafted polyvinyl alcohol microencapsulation processing is added to the mixture of step (1)
In, 10min is stirred with 800 ~ 900r/min；Then curing agent, brightener, levelling agent, antioxidant, electric agent, defoaming agent is added
Continue to stir 10min with 800 ~ 900r/min, mix them thoroughly uniformly；
(3) modified epoxy A, modified epoxy B, pigment are weighed into corresponding parts by weight and is added to high-speed mixer
In, 10min is stirred with 800 ~ 900r/min, is uniformly mixed resin particle；
(4) mixture in step (2), (3) is passed through into two automatic weighing feeding bin feedings respectively, twin-screw melting extrusion,
100-110 DEG C of melt zone temperature, 110-120 DEG C of head extrusion temperature lead to cooling water in twin-screw, and temperature control is stablized, will not be because of
Screw rod frictional heat is excessively high to there is micro- crosslinking phenomena；
(5) melting extrusion mixture squeezes in flakes by chilling roller, is ground into small fragment after cooling, by air milling essence at powder
Then end obtains 140 mesh powders by cyclone separator and sieve, finally remove impurity by magnetic separation, obtain finished powder.
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| CN111187560A (en) * | 2020-04-01 | 2020-05-22 | 江苏江南绝缘粉末有限公司 | Ultrahigh-voltage flame-retardant insulating powder for outdoor busbar and preparation method thereof |
| CN115160897A (en) * | 2022-08-15 | 2022-10-11 | 项黎明 | Temperature-resistant pressure-resistant heavy-duty anticorrosive powder coating and preparation method and spraying method thereof |
| CN116333567A (en) * | 2023-04-11 | 2023-06-27 | 浙江大学 | Insulating powder for flexible connection of bus bar of power battery and preparation method thereof |
| US11721455B1 (en) | 2023-01-19 | 2023-08-08 | King Abdulaziz University | Organic resistor |
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| CN116333567B (en) * | 2023-04-11 | 2023-12-29 | 浙江大学 | Insulating powder for flexible connection of bus bar of power battery and preparation method thereof |
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