CN109897401A - A kind of siliceous high-temperature-resistant insulating paint and its preparation method and application - Google Patents
A kind of siliceous high-temperature-resistant insulating paint and its preparation method and application Download PDFInfo
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- CN109897401A CN109897401A CN201711286265.2A CN201711286265A CN109897401A CN 109897401 A CN109897401 A CN 109897401A CN 201711286265 A CN201711286265 A CN 201711286265A CN 109897401 A CN109897401 A CN 109897401A
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- temperature
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- resistant insulating
- insulating paint
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- 239000003973 paint Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 239000000243 solution Substances 0.000 claims abstract description 71
- 239000011248 coating agent Substances 0.000 claims abstract description 68
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 54
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 38
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 37
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 37
- 239000010452 phosphate Substances 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 27
- 239000011787 zinc oxide Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 13
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 13
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004327 boric acid Substances 0.000 claims abstract description 12
- 239000003085 diluting agent Substances 0.000 claims abstract description 11
- 238000000498 ball milling Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000010792 warming Methods 0.000 claims abstract description 7
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 25
- 239000000347 magnesium hydroxide Substances 0.000 claims description 25
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 25
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 24
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000012266 salt solution Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 5
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910001415 sodium ion Inorganic materials 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 10
- 239000011777 magnesium Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229960004756 ethanol Drugs 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- -1 hydrogen salt Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 102000004160 Phosphoric Monoester Hydrolases Human genes 0.000 description 1
- 108090000608 Phosphoric Monoester Hydrolases Proteins 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The present invention relates to a kind of siliceous high-temperature-resistant insulating paints and preparation method thereof.The siliceous high-temperature-resistant insulating paint includes following component or is grouped as by following group: phosphate solution, silica, aluminium oxide, zinc oxide, silica solution and diluent and optional boric acid.The method includes the preparations of phosphate solution: phosphoric acid solution and metal hydroxides are warming up to boil condition and keep transparent to reaction system, be then cooled to room temperature and be aged 12 hours or more；The preparation of siliceous high-temperature-resistant insulating paint: phosphate solution, silica, aluminium oxide, zinc oxide, silica solution and diluent and optional boric acid is added, after mixing evenly ball milling, to obtain the siliceous high-temperature-resistant insulating paint.The present invention also provides application of the coating in preparation high temperature resistant and/or insulating coating.Coating of the present invention has the performances such as excellent heat-resisting quantity, insulating properties and adhesion.
Description
Technical field
The present invention relates to paint fields, and in particular to a kind of siliceous high-temperature-resistant insulating paint and its preparation method and application.
Background technique
With the rapid development of the industries such as Aeronautics and Astronautics, automobile and weapons, the requirement for material protection is increasingly
Height, certain elements need the operations under high temperature and corrosive environment, at the same also to have the physical characteristics such as antifatigue, anti-thermal shock and
The functional properties such as insulation.Coatings have excellent electrical insulating property, are widely used in electrical property component field.It is organic exhausted
Edge coating is easy aging and does not have flame retarding function.Inorganic coating has the characteristics that high temperature resistant, corrosion-resistant, do not go mouldy can be to base
Body plays the role of long-effective protection.But existing inorganic coating there are still such as adhesive force, corrosion resistance, corrosivity, heat resistance,
The deficiency of middle one or more kinds of performances of the performances such as shock resistance, weatherability, foaming characteristic, stability.
Summary of the invention
Existing in the prior art above-mentioned one or more kinds of insufficient in order to solve, the present invention provides one in first aspect
The siliceous high-temperature-resistant insulating paint of kind, the siliceous high-temperature-resistant insulating paint include following component or are grouped as by following group: phosphorus
Acid salt solution, silica, aluminium oxide, zinc oxide, silica solution and diluent and optional boric acid.
The present invention additionally provides in second aspect and a kind of prepare siliceous high-temperature insulation described in first aspect present invention and apply
The method of material, described method includes following steps: (1) preparation of phosphate solution: phosphoric acid solution and metal hydroxides being set
It is mixed in reaction vessel and is warming up to boil condition and reacted, until the transparency of reaction system is not further added by；Then, will
Reaction system is cooled to room temperature, and at room temperature ageing 12 hours or more, is preferably aged 12 hours to 36 hours, obtains phosphate
Solution；(2) phosphate solution, silica, oxidation the preparation of siliceous high-temperature-resistant insulating paint: are added in Xiang Suoshu phosphate solution
Aluminium, zinc oxide, silica solution and diluent and optional boric acid, it is excellent after mixing evenly by ball milling method mixing 2 hours or more
First ball milling 2 hours to 8 hours, to obtain the siliceous high-temperature-resistant insulating paint.
The present invention has following beneficial technical effect:
(1) high temperature resistant.Coating of the invention is applied by phosphate solution as main film forming substance, therefore by coating of the present invention
The maximum operation (service) temperature of the coating of system can be up to 1000 DEG C.
(2) insulating properties.Coating of the invention can be applied to conductive surface and play the role of insulation.
(3) anticorrosive property.Excellent anticorrosive property is provided for coated substrate by the coating that coating of the invention coats.
(4) stability.In some preferred embodiments, coating of the invention is due to controlling phosphatic composition,
So that coating is not likely to produce precipitating, can be stored for a long time after preparation.
(5) Anti-bubble.In some preferred embodiments, coating of the invention is due to controlling phosphatic group
At, therefore reduce or prevent the appearance of foaming phenomena when coating coating using coating of the invention.
(6) coating surface slickness is good.In some preferred embodiments, coating of the invention is due to using spherical powder
Material, in particular by the spherical powder with a certain proportion of specific surface area combination in the case where, these spherical powders are solid
Can be in coating substrate surface self assembly before change, therefore smooth coating can be formed.
(7) adhesive force is strong.The adhesive force of the coating coated by coating of the present invention can achieve 2 grades.
(8) shock resistance is good.The coating coated by coating of the present invention does not also crack under conditions of 800 DEG C to air quenching,
It is not stratified with matrix surface.
(9) corrosivity.In some preferred embodiments, coating of the invention is due to controlling phosphatic ratio,
The acidity of coating is controlled, therefore can be reduced to coated substrate such as corrosion of metal.On the other hand, slight excess of phosphorus
Acid is conducive to combining closely for coating and basal body interface to the acid etching of coated substrate such as metal appropriateness.
Specific embodiment
As described above, the present invention provides a kind of siliceous high-temperature-resistant insulating paint, the siliceous high temperature resistant in first aspect
Coatings include following component or are grouped as by following group: phosphate solution, silica, aluminium oxide, zinc oxide, silica solution
With diluent and optional boric acid.
In some preferred embodiments, the phosphate solution is phosphoric acid magnesium salt solution, the more preferably phosphoric acid of magnesium
The hydrophosphate of dihydric salt and/or magnesium.The phosphate solution can also be phosphalugel solution, the more preferably di(2-ethylhexyl)phosphate of aluminium
The hydrophosphate of hydrogen salt and/or magnesium.It is further preferred that the phosphate solution is the phosphoric acid magnesium salt solution and the aluminum phosphate
The combination of salting liquid.
In some preferred embodiments, the phosphate solution is prepared as follows: by phosphoric acid solution and gold
Belong to hydroxide and be placed in reaction vessel and mix and be warming up to boil condition and reacted, until reaction system become it is transparent and
The transparency is not further added by.With the progress of reaction, reaction system can gradually become transparent and finally no longer become more transparent
(i.e. transparency is not further added by) it is transparent can to observe by the naked eye reaction system)；Then, reaction system is cooled to
Room temperature, and at room temperature ageing 12 hours or more, preferably it is aged 12 hours to 36 hours.If digestion time is insufficient, possible body
Be it is unstable, influence the uniformity and adhesion strength of coating.By ageing, the equal of coating obtained by the present invention can be significantly improved
Even property and adhesion strength, to avoid coating peeling, reason is also unknown at present, and mechanism is up for further studying.
In some preferred embodiments, the phosphoric acid solution is the phosphate aqueous solution of 85 mass % or more, such as dense
Degree is the phosphate aqueous solution of 85 mass %.If phosphoric acid solution concentration is too low, reaction speed may be excessively slow, and with metal hydrogen-oxygen
The reaction of compound may not be sufficient, it is also possible to which the stability of the coating finally obtained is insufficient, and curing rate is slow, and coating is taken
Between it is long.
Wherein, the metal hydroxides is aluminium hydroxide and/or magnesium hydroxide, it can it is aluminium hydroxide, it can also be with
For magnesium hydroxide, the more preferably combination of aluminium hydroxide and magnesium hydroxide.
In the case where the metal hydroxides is aluminium hydroxide, the phosphoric acid and hydrogen-oxygen of participation and the reaction of aluminium hydroxide
The mass ratio for changing aluminium is 4~5:1, for example, 4:1,4.5:1 or 5:1.If the amount of aluminium hydroxide is excessive, phosphoric acid and hydroxide
Reactive aluminum is insufficient, precipitating is precipitated after there is white size pellets or cooling, so that wanted coating can not be made.If phosphorus
The dosage of acid is excessive, then is easy to cause to corrode to coated substrate, especially in the case where coated substrate is metal, in coating
Large quantitative metal liquid body can be generated, the uniformity of coating is destroyed, causes solidification difficult.
In the case where the metal hydroxides is magnesium hydroxide, the phosphoric acid and hydrogen-oxygen of participation and the reaction of magnesium hydroxide
The mass ratio for changing magnesium is 3.5~4.5:1.If the amount of magnesium hydroxide is excessive, phosphoric acid reacts not exclusively with magnesium hydroxide, reaction
System is agglomerated.If the dosage of phosphoric acid is excessive, it is easy that coated substrate is caused to corrode, is especially gold in coated substrate
In the case where category, large quantitative metal liquid body can be generated in coating, destroys the uniformity of coating, cause solidification difficult.
In the case where the metal hydroxides is the combination of aluminium hydroxide and magnesium hydroxide, participate in and aluminium hydroxide
The mass ratio of the phosphoric acid of reaction and aluminium hydroxide is 4~5:1, for example, 4:1,4.5:1 or 5:1, and is participated in and magnesium hydroxide
Reaction phosphoric acid and magnesium hydroxide mass ratio be 3.5~4.5:1.It is further preferred that the matter of magnesium hydroxide and aluminium hydroxide
Amount is than being not more than 0.4:1, for example, 0.1:1 to 0.4:1.If the mass ratio of magnesium hydroxide and aluminium hydroxide is excessive, i.e. hydrogen-oxygen
The quality accounting for changing magnesium is excessive, then the shock resistance of the coating coated by coating especially thermal shock resistance is poor, and coating is easy out
It splits, causes the separation with coated substrate.Specific mechanism is also unknown at present, needs to be further analyzed research.
In some preferred embodiments, the silica is powder particle form, and the average grain of powder particle
Diameter is 0.1 μm~0.3 μm, for example, 0.2 μm.
In some preferred embodiments, the aluminium oxide is powder particle form, and the average grain of powder particle
Diameter is 0.8 μm~2 μm, such as 1,1.5 or 2 μm.
The presence of aluminium oxide can improve the temperature tolerance of coating, and can reduce the corruption of coating with extra phosphatase reaction
Corrosion.The presence of silica can reduce fusing point, and due to oxidation at the use temperature (such as 1000 DEG C) more than 800 DEG C
Silicon can occur recrystallization phenomenon and can obtain the finer and close coating of coating.
In some preferred embodiments, the zinc oxide is powder particle form, and the average grain of powder particle
Diameter is 0.1 μm~0.3 μm, for example, 0.2 μm.Zinc oxide is added as additive, can be played thickening reinforcement and be promoted crosslinking
Effect.If the average grain diameter of Zinc oxide powder particle is too small, it is excessive to may cause system viscosity；If Zinc oxide powder
The average grain diameter of grain is excessive, then may not have strengthening effect.
In some preferred embodiments, the dioxide-containing silica in the silica solution is 21~25 mass %, such as
For 22,23,24 or 25 mass %.If the concentration of the silica in silica solution is excessive, coating surface cracking may cause；
If concentration is too low, possible coating surface is not fine and close.In addition, sodium ion when further preferential, in the silica solution
Content is less than 0.006 mass %.If the concentration of the sodium ion wherein contained is excessive, the use temperature of coating may be reduced.
It may further be preferable that pH value of the silica solution at 20 DEG C is 2~4.If pH is excessive, entire painting Material may cause
The instability problem of system.In coating system of the invention, due to the presence of phosphate and silica solution, so that coating was solidifying
Si-P-O key network can be formed in journey, improve coating to the intensity of the caking property and coating itself of matrix；Moreover, because silicon
Silica in colloidal sol can be filled in silica and aluminium oxide after paint solidification in the form of nano SiO 2 particle
In particulate interspaces, it is hereby achieved that very fine and close coating.
In some preferred embodiments, the diluent is dehydrated alcohol or ethanol water, and still, ethyl alcohol is water-soluble
The concentration of liquid preferably more than 50 volume % (such as 60,70,80 or 90 volume % or more), otherwise solution makes coating obtained
Comprising excessive moisture, the problem of causing excess moisture as described above to cause.
In some preferred embodiments, the concentration of each component in the siliceous high-temperature-resistant insulating paint is such as
Under: 20~40 mass % (the mass % of for example, 20,30 or 40) phosphate solution；0~1 mass % boric acid (for example, 0.1,0.5
Or 1 mass %)；2~10 mass % (the mass % of for example, 2,4,6,8 or 10) silica；15~40 mass % (for example, 20,
25,30,35 or 40 mass %) aluminium oxide；1~3 mass % (the mass % of for example, 1,2 or 3) zinc oxide；10~30 mass %
(the mass % of for example, 10,15,20,25 or 30) silica solution；With 10~50 mass % (matter of for example, 10,20,30,40 or 50
Measure %) diluent.Wherein, fusing point can be reduced and promote to form a film by adding a small amount of boric acid.
In some preferred embodiments, the solidification temperature of the siliceous high-temperature-resistant insulating paint is 100 DEG C~130
℃.Coating of the invention is coated on substrate, through 100 DEG C~130 DEG C at a temperature of solidify, coating of the invention can occur
The binding force of dehydration reaction, coating and matrix improves, and stable coatings can be formed on matrix.The use temperature of gained coating can
To be up to 1000 DEG C.In addition, at service temperatures, which plays the role of insulation, anticorrosion etc. to matrix such as metallic matrix.
The present invention filters in second aspect offer and a kind of prepare siliceous high-temperature insulation described in first aspect present invention and apply
The method of material, described method includes following steps:
(1) preparation of phosphate solution: phosphoric acid solution and metal hydroxides are placed in reaction vessel and mixes and heats up
It is reacted to boil condition, until reaction system becomes transparent and transparent is not further added by；Then, reaction system is cooled down
To room temperature, and be aged 12 hours in room temperature or more, it is preferably aged 12 hours to 36 hours, obtains phosphate solution；
(2) preparation of siliceous high-temperature-resistant insulating paint: in Xiang Suoshu phosphate solution be added phosphate solution, silica,
Aluminium oxide, zinc oxide, silica solution and diluent and optional boric acid, after mixing evenly by ball milling method mixing 2 hours with
On, preferential ball milling 2 hours to 8 hours, to obtain the siliceous high-temperature-resistant insulating paint.
Embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Technical solution in the embodiment of the present invention is become apparent from, is fully described by.But described embodiment is of the invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment 1: phosphalugel solution is prepared
Weigh 85% concentration phosphoric acid 230g, Al (OH)3Powder 50g, which is placed in reaction vessel, to stir evenly.It is stirred to react simultaneously
It is warming up to boil condition, stops heating after reaction system is transparent.Reaction system is aged 12 hours after being cooled to room temperature.
Embodiment 2: phosphoric acid magnesium salts and phosphalugel solution are prepared
Weigh 85% concentration phosphoric acid 290g, Al (OH)3Powder 50g, Mg (OH)2Powder 15g, is placed in reaction vessel and stirs
Uniformly.It is stirred to react and is warming up to boil condition, stops heating after reaction system is transparent.Reaction system is aged after being cooled to room temperature
16 hours.
Embodiment 3: siliceous high-temperature-resistant insulating paint
Phosphate solution, the 1g boric acid, 8g silica, 26g aluminium oxide, 4g zinc oxide, 35g silicon for taking 40g embodiment 1 to prepare
Colloidal sol (wherein dioxide-containing silica is 25 mass %, and sodium ions content is 0.024 mass %, pH 2.4), 36g concentration
50% ethanol solution, it is uniform by ball milling method mixing, obtain high-temperature insulating paint.Coating solidifies institute on stainless steel base
Coating is obtained, 30h is not fallen off under 1000 DEG C of environment, tests 2 grades of adhesive force, average dielectric constant 3.42 (repeat number n=10).
Embodiment 4: siliceous high-temperature-resistant insulating paint
Phosphate solution, the 1g boric acid, 8g silica, 26g aluminium oxide, 4g zinc oxide, 35g silicon for taking 40g embodiment 2 to prepare
Colloidal sol (wherein dioxide-containing silica is 25 mass %, and sodium ions content is 0.024 mass %, pH 2.4), 36g concentration
50% ethanol solution, it is uniform by ball milling method mixing, obtain high-temperature insulating paint.Coating solidifies institute on stainless steel base
Coating is obtained, 30h is not fallen off under 1000 DEG C of environment, tests 2 grades of adhesive force, average dielectric constant 3.44 (repeat number n=10).
Embodiment 5 to 11
It controls phosphoric acid and magnesium hydroxide mass ratio is 4:1；The mass ratio of aluminium hydroxide and magnesium hydroxide is 3.5:1, as follows
Change the mass ratio of phosphoric acid and aluminium hydroxide shown in table, other according to phosphate solution is prepared described in embodiment 2, then according still further to
Coating is prepared described in embodiment 4.As a result as shown in the table.
Embodiment 12 to 17
It controls phosphoric acid and aluminium hydroxide mass ratio is 4.6:1；The mass ratio of aluminium hydroxide and magnesium hydroxide is 4:1, as follows
Change the mass ratio of phosphoric acid and magnesium hydroxide shown in table, other according to phosphate solution is prepared described in embodiment 2, then according still further to
Coating is prepared described in embodiment 4.As a result as shown in the table.
Embodiment 18 to 24
Phosphoric acid and aluminium hydroxide mass ratio are controlled as 4.6:1, the mass ratio of phosphoric acid and magnesium hydroxide is 4:1；Such as following table institute
Show change aluminium hydroxide and magnesium hydroxide mass ratio, other according to phosphate solution is prepared described in embodiment 2, then according still further to
Coating is prepared described in embodiment 4.As a result as shown in the table.
Embodiment 25 to 36
Other than the digestion time of content and embodiment 35 and 36 shown in the following table is respectively 4 hours and 0 hour,
He all in accordance with preparing phosphate solution described in embodiment 2, and prepare coating according to described in embodiment 4.
Note: each component is in terms of weight percentage.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of siliceous high-temperature-resistant insulating paint, which is characterized in that the siliceous high-temperature-resistant insulating paint include following component or
Person is grouped as by following group: phosphate solution, silica, aluminium oxide, zinc oxide, silica solution and diluent and optional boron
Acid.
2. siliceous high-temperature-resistant insulating paint according to claim 1, which is characterized in that the siliceous high-temperature-resistant insulating paint
In each component concentration it is as follows: 20~40 mass % phosphate solutions；0-1 mass % boric acid；2~10 mass % oxidation
Silicon；15~40 mass % aluminium oxide；1~3 mass % zinc oxide；10~30 mass % silica solution；It is diluted with 10~50 mass %
Agent.
3. siliceous high-temperature-resistant insulating paint according to claim 1 or 2, it is characterised in that:
The silica is powder particle form, and the average grain diameter of powder particle is 0.1 μm~0.3 μm；
The zinc oxide is powder particle form, and the average grain diameter of powder particle is 0.1 μm~0.3 μm；
The aluminium oxide is powder particle form, and the average grain diameter of powder particle is 0.8 μm~2 μm.
4. siliceous high-temperature-resistant insulating paint according to any one of claim 1 to 3, it is characterised in that:
Dioxide-containing silica in the silica solution is 21~25 mass %, and sodium ions content is less than 0.006 mass %；
Preferably, pH value of the silica solution at 20 DEG C is 2~4.
5. siliceous high-temperature-resistant insulating paint according to any one of claim 1 to 4, which is characterized in that the diluent
For dehydrated alcohol or ethanol water, the ethanol water is preferably the ethanol water of 50 volume %.
6. siliceous high-temperature-resistant insulating paint according to any one of claim 1 to 5, which is characterized in that the phosphate
Solution is phosphoric acid magnesium salt solution and/or phosphalugel solution；Preferably, the phosphate solution is phosphoric acid magnesium salt solution and phosphorus
The combination of sour aluminum salt solution.
7. siliceous high-temperature-resistant insulating paint according to claim 6, which is characterized in that the phosphate solution presses such as lower section
Formula preparation:
Phosphoric acid solution and metal hydroxides are placed in reaction vessel and mixes and is warming up to boil condition and react, until anti-
It answers system to become transparent and transparent is not further added by；Then, reaction system is cooled to room temperature, and is aged 12 hours in room temperature
More than, preferably it is aged 12 hours to 36 hours；Wherein, the metal hydroxides be aluminium hydroxide and/or magnesium hydroxide, preferably
For the combination of aluminium hydroxide and magnesium hydroxide.
8. high temperature resistant fluorescent paint according to any one of claim 1 to 7, which is characterized in that the phosphoric acid solution is
The phosphate aqueous solution of 85 mass % or more, and:
In the case where the metal hydroxides is aluminium hydroxide, the phosphoric acid and aluminium hydroxide of participation and the reaction of aluminium hydroxide
Mass ratio be 4~5:1；
In the case where the metal hydroxides is magnesium hydroxide, the phosphoric acid and magnesium hydroxide of participation and the reaction of magnesium hydroxide
Mass ratio be 3.5~4.5:1；
In the case where the metal hydroxides is the combination of aluminium hydroxide and magnesium hydroxide, magnesium hydroxide and aluminium hydroxide
Mass ratio is not more than 2:5.
9. a kind of method for preparing siliceous high-temperature-resistant insulating paint described in any item of the claim 1 to 8, which is characterized in that
Described method includes following steps:
(1) preparation of phosphate solution: phosphoric acid solution and metal hydroxides are placed in reaction vessel to mix and be warming up to and boiled
Boiling state is reacted, until reaction system becomes transparent and transparent is not further added by；Then, reaction system is cooled to room
Temperature, and at room temperature ageing 12 hours or more, it is preferably aged 12 hours to 36 hours, obtains phosphate solution；
(2) phosphate solution, silica, oxidation the preparation of siliceous high-temperature-resistant insulating paint: are added in Xiang Suoshu phosphate solution
Aluminium, zinc oxide, silica solution and diluent and optional boric acid, it is excellent after mixing evenly by ball milling method mixing 2 hours or more
First ball milling 2 hours to 8 hours, to obtain the siliceous high-temperature-resistant insulating paint.
10. siliceous high-temperature-resistant insulating paint according to any one of claim 1 to 8 or side as claimed in claim 9
Application of the siliceous high-temperature-resistant insulating paint made from method in preparation high temperature resistant and/or insulating coating.
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| CN201711286265.2A CN109897401A (en) | 2017-12-07 | 2017-12-07 | A kind of siliceous high-temperature-resistant insulating paint and its preparation method and application |
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| CN111073356A (en) * | 2019-12-02 | 2020-04-28 | 中昊北方涂料工业研究设计院有限公司 | Single-component chromium-free silicon steel sheet protective coating and preparation thereof |
| CN112239863A (en) * | 2020-09-11 | 2021-01-19 | 武汉圆融科技有限责任公司 | Insulating coating liquid for improving oriented silicon steel surface coating cracks, preparation method thereof and oriented silicon steel plate |
| CN112341845A (en) * | 2020-09-27 | 2021-02-09 | 中昊北方涂料工业研究设计院有限公司 | Chromium-free aluminum-containing phosphate composition and coating |
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Application publication date: 20190618 |