CN117229681A - Antirust heat-insulating coating and preparation method and application thereof - Google Patents
Antirust heat-insulating coating and preparation method and application thereof Download PDFInfo
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- CN117229681A CN117229681A CN202310976953.0A CN202310976953A CN117229681A CN 117229681 A CN117229681 A CN 117229681A CN 202310976953 A CN202310976953 A CN 202310976953A CN 117229681 A CN117229681 A CN 117229681A
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- 238000000576 coating method Methods 0.000 title claims abstract description 70
- 239000011248 coating agent Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 54
- 239000011324 bead Substances 0.000 claims abstract description 48
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 44
- 150000004760 silicates Chemical class 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 28
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000839 emulsion Substances 0.000 claims abstract description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000003381 stabilizer Substances 0.000 claims abstract description 15
- 230000004048 modification Effects 0.000 claims abstract description 14
- 238000012986 modification Methods 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000010445 mica Substances 0.000 claims abstract description 11
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 11
- 239000002562 thickening agent Substances 0.000 claims abstract description 11
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 11
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000000080 wetting agent Substances 0.000 claims abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 7
- 239000003112 inhibitor Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 7
- 239000007822 coupling agent Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000004005 microsphere Substances 0.000 claims description 4
- 230000004224 protection Effects 0.000 claims description 3
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 9
- 150000003839 salts Chemical class 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 8
- 239000000853 adhesive Substances 0.000 abstract description 7
- 230000001070 adhesive effect Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 7
- 239000003973 paint Substances 0.000 description 20
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 17
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- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004111 Potassium silicate Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 229910052913 potassium silicate Inorganic materials 0.000 description 6
- 235000019353 potassium silicate Nutrition 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000003760 magnetic stirring Methods 0.000 description 5
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
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- 229910021532 Calcite Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- -1 amine salt Chemical class 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
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- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910001447 ferric ion Inorganic materials 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
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- 230000000670 limiting effect Effects 0.000 description 2
- 239000011325 microbead Substances 0.000 description 2
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- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
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- 238000010992 reflux Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical group CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241001521402 Maackia <angiosperm> Species 0.000 description 1
- HSHXDCVZWHOWCS-UHFFFAOYSA-N N'-hexadecylthiophene-2-carbohydrazide Chemical compound CCCCCCCCCCCCCCCCNNC(=O)c1cccs1 HSHXDCVZWHOWCS-UHFFFAOYSA-N 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229940092782 bentonite Drugs 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000012767 functional filler Substances 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 150000004812 organic fluorine compounds Chemical class 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
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- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229940080314 sodium bentonite Drugs 0.000 description 1
- 229910000280 sodium bentonite Inorganic materials 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The invention discloses an antirust heat-insulating coating, a preparation method and application thereof, which are used in the field of coatings. The preparation raw materials of the invention comprise the following components in parts by weight: cellulose ether 0.3-0.6 part; 0.3 to 0.7 part of dispersing agent; 0.3 to 0.5 part of wetting agent; 0.3 to 0.5 part of defoaming agent; 0.5 to 1 part of stabilizer; 0.2 to 0.5 part of anti-settling agent; 10-30 parts of heavy calcium carbonate; 10-20 parts of titanium dioxide; 3-10 parts of mica powder; 0.5 to 1 part of flash rust inhibitor; 5-10 parts of acrylic emulsion; 25-45 parts of modified silicate and hollow glass bead materials; 0.3-1 part of thickener; 18-25 parts of water, wherein the modified silicate and the hollow glass bead material are synthesized through two steps of silicate modification and hollow glass bead modification. The modified material has good coating adhesive force, corrosion resistance and rust resistance, and also has good salt fog resistance and heat insulation effect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an antirust heat-insulating coating, a preparation method and application thereof.
Background
The factory building is generally the structure of various steel sheet and various steel tile, and the south weather changes soon, and summer temperature is higher, and the factory building surface often needs to bear the insolateing of sun, probably is the heavy rain again after insolateing, so the coating harm to the factory building surface is very big, can accelerate the corrosion of various steel sheet in addition, and this is why the roof of the factory building of a lot of use time long points in south in China all is the reason of yellow spot piece. With the progress of social development and scientific technology, the market has increasingly higher requirements on weather resistance, durability, functionality and the like of the coating. The paint for the color steel plate in the prior art mostly adopts organic components, and the organic components have the problems of poor weather resistance, yellowing of the coating, falling off, cracking, fading and the like of the paint layer after long-time use, and cannot meet higher requirements on durability. The oily paint is used, waste gas and waste materials can be generated during production and construction, and the environmental pollution is large. For the south factory building, the temperature in the building is also high in summer, which requires larger electric energy consumption to maintain the proper temperature. If a layer of heat-insulating coating can be made on the surface, the energy consumption can be reduced to a great extent, and the electric energy expenditure of a factory can be reduced.
The traditional heat-insulating color steel plate coating mainly uses water-based epoxy resin as a film forming substance, has poor weather resistance, can not solve the problem of yellow rust spots by recoating, has poor heat-insulating reflection effect of the used functional filler, and can not realize plump and bright color of a coating film. The prior art discloses a long-pot-life quick-drying water-based heat-reflecting heat-insulating coating and a preparation method thereof, and raw materials used in the method contain volatile organic compounds such as anhydrous diluents, drier and the like, and volatilize rapidly during construction, so that VOC concentration is higher during construction, and the damage to human bodies is larger. The components of the adhesive are AB components, so that the construction is troublesome, and the phenomenon of incomplete curing exists.
Therefore, an anti-aging coating which is simple in construction, environment-friendly in materials, capable of solving the problem of secondary recoating of the color steel plate anti-rust coating and good in house heat insulation effect is needed to be developed.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the antirust heat-insulating coating provided by the invention has good coating adhesive force, corrosion resistance and rust resistance, and also has good durability, salt fog resistance and heat insulation effect.
The invention also provides a preparation method of the antirust heat-insulating coating.
The invention also provides application of the antirust heat-insulating coating.
The invention provides an antirust heat-insulating coating, which is prepared from the following raw materials in parts by weight:
cellulose ether 0.3-0.6 part;
0.3 to 0.7 part of dispersing agent;
0.3 to 0.5 part of wetting agent;
0.3 to 0.5 part of defoaming agent;
0.5 to 1 part of stabilizer;
0.2 to 0.5 part of anti-settling agent;
10-30 parts of heavy calcium carbonate;
10-20 parts of titanium dioxide;
3-10 parts of mica powder;
0.5 to 1 part of flash rust inhibitor;
5-10 parts of acrylic emulsion;
25-45 parts of modified silicate and hollow glass bead materials;
0.3-1 part of thickener;
18-25 parts of water.
According to the embodiment of the first aspect of the invention, at least the following beneficial effects are achieved:
(1) The invention modifies silicate, improves the modulus of silicate and adjusts pH value to obtain more hydroxyl functional groups. The ferric ion rust-resistant steel has strong condensation capability, and silicate with proper modulus is matched with hydroxyl on the surface of the steel to carry out dehydration condensation reaction, so that a firm protective film taking ferric silicate as a main body can be formed, and the compact passivation film has good adhesion effect. After modification, the PH of the system is high enough to be more than 12, and the oxidation reaction of iron can be inhibited. Meanwhile, the generated ferric silicate passivation layer can isolate air and prevent flash rust. The coating adhesive force test after material modification is 5B grade, and the corrosion resistance and rust resistance is 960h without foaming, the corrosion width is less than 2mm and no rust spots according to the salt spray test specification ASTM B117-03.
(2) According to the invention, alkali etching is carried out on the hollow glass beads, and the surface of the hollow glass beads is corroded to form ravines, so that the ravines are easier to enter the ravines on the surfaces of the hollow glass beads together with the resin matrix macromolecule chain segments, an anchoring effect is generated, and the acting force between the two interfaces is increased; on the other hand, after etching, a large amount of silicon hydroxyl groups are generated on the surfaces of the microbeads, which is beneficial to increasing the interfacial binding force between two phases. Therefore, the adhesive force of the coating can be enhanced through the modification of the hollow glass beads, so that the durability and the temperature resistance of the coating are better, and in addition, more than 85% of heat of the sun can be blocked on the surface of the substrate coated with the reflective heat-insulating coating due to the reflection of the titanium dioxide and the hollow glass beads to sunlight, thereby reducing the energy consumption of an air conditioner and improving the working environment of workers. Through detection, the temperature difference between the coating and the back surface of the roof color steel plate is about 10.3 ℃, and the outdoor temperature and the indoor temperature difference can reach about 5.2 ℃.
(3) The invention takes inorganic materials as main materials, has environmental protection, small VOC emission and small air pollution, and can make up the defects of large volume shrinkage and easy cracking of coating film of silicate in the curing process by properly adding organic emulsion as an elastic modified material. The product can be constructed by spraying or rolling coating, is very simple and convenient, and does not need to be mixed and stirred again. In particular to the secondary reinstallation of a factory building, the paint can be coated with rust, rust removal is not needed, and rust return is avoided in direct construction.
According to some embodiments of the invention, the preparation raw materials of the antirust heat-insulating coating comprise the following components in parts by weight:
cellulose ether 0.5 parts;
0.5 parts of dispersing agent;
0.3 parts of wetting agent;
0.3 parts of defoamer;
0.4 parts of stabilizer;
0.3 parts of anti-settling agent;
10 parts of heavy calcium carbonate;
15 parts of titanium dioxide;
7 parts of mica powder;
0.7 part of flash rust inhibitor;
9 parts of acrylic emulsion;
35.5 parts of modified silicate and hollow glass bead materials;
0.5 parts of thickener;
20 parts of water.
According to some embodiments of the invention, the cellulose ether is at least one of methyl cellulose ether, hydroxyethyl cellulose ether, hydroxypropyl methyl cellulose ether.
According to some embodiments of the invention, the cellulose ether is hydroxyethyl cellulose ether having a viscosity of 3 ten thousand; (250 hbr; endoconcha, USA).
The cellulose ether has the function of water retention and thickening.
According to some embodiments of the invention, the dispersant is at least one of an ammonium salt and an onium salt.
Preferably, the ammonium salt comprises a quaternary ammonium salt, and the use of an amine salt of a SN-5027 polycarboxylate dispersant of the family san nopodiaceae.
According to some embodiments of the invention, the wetting agent is at least one of a polyether modified polysiloxane and an organofluorine based polymer. This example uses Haichuan PE-100 wetting agent.
According to some embodiments of the invention, the defoamer is at least one of an organosiloxane, a polyether, an imine, and an amide.
According to some embodiments of the invention, the stabilizer is at least one of a quaternary ammonium salt, a tertiary amine, and an organic-inorganic silicide.
Wherein, the stabilizer mainly improves the storage time, viscosity stability and workability of the coating.
According to some embodiments of the invention, the anti-settling agent is sodium bentonite (BP-188 bentonite, zhejiang Huate New Material Co., ltd.).
Mainly plays roles of water diversion prevention and flocculation prevention, and ensures that the coating can keep a uniform can opening effect for a long time.
According to some embodiments of the invention, the heavy calcium carbonate is calcite powder with whiteness of more than or equal to 90 and fineness of 600-800 meshes. Preferably, the heavy calcium carbonate is calcite powder (wide-source chemical GY-316 calcite powder) with whiteness of more than or equal to 90 and fineness of 800 meshes.
Mainly plays a role of filling and covering.
According to some embodiments of the invention, the titanium dioxide is rutile (Shandong Jia SR-2377 titanium dioxide).
The rutile type titanium dioxide has stronger weather resistance and ageing resistance, stronger ozone resistance and ultraviolet resistance and very high visible light reflectivity for 400-700 nm wavelength.
According to some embodiments of the invention, the mica powder has a whiteness of greater than or equal to 75.
According to some embodiments of the invention, the mica powder has a fineness of 600 to 800 mesh.
Preferably, the fineness of the mica powder is 800 mesh (Chuzhou pagoda WJ-6 mica powder).
According to some embodiments of the invention, the flash rust inhibitor is an organic corrosion inhibitor comprising an organic acid amine. (Kunshan chemical Co., ltd. R-755 anti-flash rust agent).
Can effectively inhibit the flash rust phenomenon of the water-based paint in the drying process of base materials such as carbon steel, tinplate, galvanized sheet, cold-rolled sheet and the like, and can solve the problem of water-based rust returning in a short period after the water-based paint film is dried.
According to some embodiments of the invention, the acrylic emulsion is at least one of a pure acrylic emulsion and a silicone acrylic emulsion.
According to some embodiments of the invention, the acrylic emulsion is at least one of Luo Sifu emulsion 5588 and lotus leaf chemical J504.
According to some embodiments of the invention, the thickener is at least one of a hydrophobically modified alkali swellable thickener, a nonionic polyurethane, and an alkali swellable acrylic thickener.
According to some embodiments of the invention, the thickener may be SR-800 from the chemical industry Co.Ltd.
According to some embodiments of the invention, the modified silicate and hollow glass bead material is synthesized in two steps by modification of silicate and modification of hollow glass beads.
According to some embodiments of the invention, the method for the modified preparation of silicate comprises the steps of:
mixing silicate, silica sol, an organosilicon coupling agent and a stabilizer, and heating and stirring to obtain a modified silicate solution;
according to some embodiments of the invention, the silicate comprises at least one of potassium silicate and sodium silicate.
Preferably, the silicate is potassium silicate.
Wherein, the potassium silicate is colorless or yellowish semitransparent to transparent glass, has hygroscopicity and strong alkaline reaction. The silica sol belongs to colloidal solution, and has no odor and toxicity. Silica sols are dispersions of nanoscale silica particles in water or in solvents. SiO in silica sol 2 Since silica sol contains a large amount of water and hydroxyl groups, it can be expressed as SiO 2 ·nH 2 O. The hydroxyl groups are reduced by the addition of silica sol and the pH of the system is changed by the heating reaction. The two particle size distribution peaks of the silica sol change and the active silicon in the potassium silicate forms a new particle size distribution that is different from both the original silica sol and the potassium silicate on particles that are rearranged on the silica sol.
According to some embodiments of the invention, the silicone coupling agent is gamma-glycidoxypropyl trimethoxysilane (CAS number 2530-83-8; chengdu Maackia chemical Co., ltd.).
According to some embodiments of the invention, the temperature of the heat treatment is 50-75 ℃, which may be, for example, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃.
According to some embodiments of the invention, the stirring time is 30-60 min, for example 30min, 35min, 40min, 45min, 50min, 55min, 60min.
According to some embodiments of the invention, the silicate modification preparation method comprises the following specific steps:
and (3) placing silicate and silica sol in a magnetic stirrer, starting magnetic stirring, regulating the temperature to 50 ℃, dropwise adding an organosilicon coupling agent after stabilizing the temperature, adding a quaternary ammonium salt stabilizer, continuously stirring for 30min after adding, raising the temperature to 75 ℃, and stirring and reacting for 30min to obtain a modified silicate solution.
The silicate is subjected to special modification treatment, so that more hydroxyl functional groups and fine particles can be obtained, the fine particles have strong permeability to a base layer, can permeate into the base layer through capillaries, have strong condensation capability to ferric ions rusted by steel, and simultaneously are matched with silicate with proper modulus to perform dehydration condensation reaction with hydroxyl groups on the surface of the steel, so that a firm protective film taking ferric silicate as a main body can be formed. 4Fe+3O 2 +XH 2 O＝＝2Fe 2 O 3 ·XH 2 O，2Fe 2 O 3 ·XH 2 O is a component of rust and can also be written as Fe x [(OH) 3 ] n The pH of the system is high enough to reach more than 12, so that the reaction can be inhibited. Meanwhile, the generated ferric silicate passivation layer can also prevent flash rust. Wherein the quaternary ammonium salt stabilizer can be prepared from antirust heat-insulating paint.
According to some embodiments of the invention, the silicate has a modulus of 2.8 to 3.8. For example, 2.8, 3, 3.2, 3.4, 3.6, 3.8.
According to some embodiments of the invention, the modulus of the modified silicate solution is 4 to 4.2, which may be, for example, 4, 4.1, 4.2.
According to some embodiments of the invention, the pH of the modified silicate solution is > 12.
According to some embodiments of the invention, the modified silicate solution has a solids content of 27-29%; the organic content is less than 2%.
According to some embodiments of the invention, the method for preparing the hollow glass microsphere comprises the following steps:
pretreating the hollow glass beads, performing heat treatment, and adding the modified silicate to react to obtain the modified silicate and hollow glass bead material.
The hollow glass bead is a glass bead which is subjected to special processing treatment, and is mainly characterized in that the density is smaller than that of the glass bead, and the thermal conductivity is poorer. The main component is borosilicate, and has the characteristics of high compressive strength, high melting point, high resistivity, small thermal conductivity coefficient and thermal contraction coefficient, and the like.
According to some embodiments of the invention, the pretreatment comprises adding hollow glass beads to a solvent, heating, refluxing, stirring, and then performing reduced pressure suction filtration.
According to some embodiments of the invention, the pressure of the reduced pressure suction filtration is 0.08-0.09 MPa.
According to some embodiments of the invention, the reduced pressure suction filtration is performed for a period of 3 to 5 minutes.
According to some embodiments of the invention, the heating temperature is 70-80 ℃, which may be, for example, 70 ℃, 71 ℃, 72 ℃, 73 ℃, 74 ℃, 75 ℃, 76 ℃, 77 ℃, 78 ℃, 79 ℃, 80 ℃.
According to some embodiments of the invention, the time of the reflux stirring is 30-40 min, for example, 30min, 31min, 32min, 33min, 34min, 35min, 36min, 37min, 38min, 39min, 40min.
According to some embodiments of the invention, the means for heat treatment is a resistance furnace.
According to some embodiments of the invention, the temperature of the heat treatment is 200-250 ℃, which may be, for example, 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 250 ℃.
According to some embodiments of the invention, the heat treatment is for a time period of 2 to 3 hours.
The heat treatment is used for fully roasting organic impurities and moisture on the surfaces of the hollow glass beads and in the cavities to activate the organic impurities and moisture.
According to some embodiments of the invention, the mass ratio of the hollow glass microsphere to the modified silicate mixture is 1: (2-3).
According to some embodiments of the invention, the hollow glass microbeads react with the modified silicate in the following specific steps:
adding the hollow glass beads after the heat treatment into modified silicate, heating and starting magnetic stirring, adding the modified silicate, then placing the solution and the precipitate thereof in ultrasonic oscillation for dispersion, precipitating and standing, filtering out impurities of the lower layer precipitate, and reserving the upper layer hollow glass beads and silicate solution to obtain the modified silicate and hollow glass bead material.
According to some embodiments of the invention, the heating temperature is 50-60 ℃, which may be, for example, 50 ℃, 51 ℃, 52 ℃, 53 ℃, 54 ℃, 55 ℃, 56 ℃, 57 ℃, 58 ℃, 59 ℃, 60 ℃.
According to some embodiments of the invention, the magnetic stirring time is 4-5 hours.
According to some embodiments of the invention, the time of the ultrasonic vibration dispersion is 40 to 50 minutes.
The second aspect of the invention provides a preparation method of the antirust heat-insulating coating, which comprises the following steps:
s1, weighing modified silicate, hollow glass bead materials and acrylic emulsion for pre-reaction;
s2, mixing and stirring cellulose ether, an anti-settling agent, a dispersing agent, a wetting agent, a defoaming agent, a stabilizing agent, heavy calcium carbonate, titanium dioxide, mica powder and an anti-flash rust agent;
and S3, mixing the products obtained in the step S1 and the step S2, adding a thickening agent, and stirring for reacting to obtain the antirust heat-insulating coating.
According to some embodiments of the invention, in step S1, the pre-reacting step is to put the modified silicate, the hollow glass bead material and the acrylic emulsion into a temperature-controlled reaction kettle to be stirred and reacted.
Through the pre-reaction of the temperature control reaction kettle, the resin matrix and the hollow glass beads are in the first reaction lap joint to form a long chain body.
According to some embodiments of the invention, in step S1, the temperature in the temperature-controlled reaction vessel is 40-50 ℃.
According to some embodiments of the invention, in step S1, the stirring speed is 500-550 r/min.
According to some embodiments of the invention, in step S1, the stirring time is 30-40 min.
According to some embodiments of the invention, in step S2, the stirring speed is 500-1000 r/min.
According to some embodiments of the invention, in step S2, the stirring time is 5 to 25min.
According to some embodiments of the invention, in step S3, the stirring speed is 300-400 r/min.
According to some embodiments of the invention, in step S3, the stirring time is 8-12 min.
The third aspect of the invention provides application of the antirust heat-insulating coating in the field of metal material protection.
According to some embodiments of the invention, the application comprises painting on a color steel sheet factory building.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic construction view of the rust inhibitive and heat-insulating paint of example 2 of the present invention;
FIG. 2 is a rust inhibitive heat insulating paint rust inhibitive performance comparison among example 2 of the present invention and comparative example 2;
(a) The rust was found after 960 hours of the coating of the steel sheet with the rust preventive heat insulating coating material of example 2; (b) The rust was found to be the result of the rust-preventing heat-insulating coating of comparative example 2 applied to a steel sheet for 960 hours.
Detailed Description
Embodiments of the present invention are described in detail below, wherein like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout the embodiments. The following examples are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that references to orientation descriptions, such as directions or positional relationships indicated above, below, etc., are based on the orientation or positional relationships shown in the embodiments, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The words "preferably," "more preferably," and the like in the present invention refer to embodiments of the invention that may provide certain benefits in some instances. However, other embodiments may be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values for the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range description features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to include any and all subranges subsumed therein.
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The reagents, methods and apparatus employed in the present invention, unless otherwise specified, are all conventional in the art.
The reagents and equipment used in the invention comprise:
temperature control reaction kettle: DFG-100, yixing city flying machinery, inc.;
resistance furnace: testoste box type resistance furnace SX-2.5-10D, testoste instruments Inc. of Tianjin.
Example 1
The embodiment provides a modified silicate and hollow glass bead material, which comprises the following specific preparation method steps:
(1) Modification of silicate: taking 100g of potassium silicate with the modulus of 3.8 and 30g of silica sol in a magnetic stirrer, starting magnetic stirring, regulating the temperature to 50 ℃, dropwise adding 1.5g of gamma-glycidol ether oxypropyl trimethoxy silane after the temperature is stable, adding 1g of quaternary ammonium salt stabilizer, continuously stirring for 30 minutes after the addition, raising the temperature to 75 ℃, stirring and reacting for 30 minutes, and recording as a solution A for later use, wherein the modulus of the solution A is 4.2, the solid content is 28+/-1%, the PH is greater than 12, and the organic content is less than 2%.
(2) 100g of hollow glass beads with the particle size of 40um are taken, 200g of isopropanol and 50g of butyl ether are added, the mixture is heated to 80 ℃, and the mixture is refluxed and stirred for 40 minutes. And (3) after the reaction is finished, carrying out vacuum filtration to obtain the pretreated hollow glass microspheres.
(3) Placing the pretreated hollow glass beads in a resistance furnace, and heat-treating for 2h at 200 ℃ to fully bake organic impurities and moisture on the surfaces of the hollow glass beads and in the cavities to activate the organic impurities and moisture
(4) 100g of solution A is added into the solution (3), the temperature is regulated to 50 ℃, magnetic stirring is started, 150g of solution A is dripped, the reaction is carried out for 4 hours, and the solution and the precipitate are placed into ultrasonic oscillation for dispersion for 40 minutes. The surfaces of the hollow glass beads are fully reacted with silicate solution to form an alkaline etching layer.
(5) And (3) precipitating and standing the solution in the step (4), filtering out impurities precipitated on the lower layer, and reserving the upper layer hollow glass beads and silicate solution to obtain the modified silicate and hollow glass bead material.
Example 2
The embodiment provides an antirust heat-insulating coating, and the preparation method specifically comprises the following steps:
(1) Weighing modified silicate, hollow glass beads and acrylic emulsion according to the weight ratio, placing the mixture in a temperature-controlled reaction kettle, setting the temperature at 5 ℃, stirring at 500r/min for 30min, and obtaining a cross-linked product (1) of the hollow glass beads and the acrylic emulsion.
(2) Weighing water according to the weight ratio, starting a high-speed dispersing machine to adjust the stirring rotation speed to 500r/min, adding cellulose ether and an anti-settling agent into the water, stirring for 5min, sequentially weighing a dispersing agent, a wetting agent, a defoaming agent and a stabilizing agent according to the weight ratio, adding the dispersing agent, the wetting agent, the defoaming agent and the stabilizing agent into the dispersing machine, adjusting the stirring rotation speed to 1000r/min, and sequentially adding heavy calcium carbonate, titanium dioxide, mica powder and an anti-flash rust agent according to the weight ratio, and stirring for 20min at a high speed.
(3) And (3) regulating the rotating speed of the dispersing machine to 300r/min, adding the crosslinking product (1), adding the thickening agent, and stirring for 8min to obtain the antirust heat-insulating coating.
Wherein, the modified silicate prepared in example 1 and hollow glass beads are adopted to prepare the antirust heat-insulating coating. The preparation raw materials consist of the raw materials in parts by weight in table 1. The effect of the anti-rust heat-insulating coating obtained in this example on the steel sheet was as shown in FIG. 2 (a), and no rust was observed over 960 hours.
Comparative example 1
This comparative example provides a rust inhibitive and heat insulating paint, which differs from example 2 in that only a modified silicate material is added.
Comparative example 2
This comparative example provides a rust inhibitive and heat-insulating paint, which is different from example 2 in that unmodified silicate and hollow glass bead materials are added, wherein the effect of the prepared rust inhibitive and heat-insulating paint coated on a steel plate is as shown in FIG. 2 (b), in which red circles indicate the occurrence of rust spots.
Comparative example 3
This comparative example provides a rust inhibitive and heat-insulating paint, which is different from example 2 in that the amount of acrylic emulsion used is reduced.
Comparative example 4
This comparative example provides a rust inhibitive and heat-insulating paint, which is different from example 2 in that the preparation method does not include step (1), i.e., the premixing step is not performed.
Table 1 example 2 and comparative examples 1 to 4 were prepared with respect to the components and parts by weight of the raw materials for preparation
Test case
The rust inhibitive heat-insulating coatings prepared in example 2 and comparative examples 1 to 4 were subjected to performance test, respectively.
The performance test method and standard adopted by the test example are as follows:
salt spray test: ASTM B117-03;
aging resistance: GB/18950-2003;
film appearance and drying time: JC/T1040-2007;
pencil hardness: GB/T6739-1996;
adhesion force: GB/T9286-1998.
Market brand 1: the reflective heat-insulating coating is a multi-bang brand reflective heat-insulating coating purchased on line;
market brand 2: the paint is a paint for bridge steel structures of certain side paint brands purchased on line;
table 2 test results of the properties of the rust inhibitive heat-insulating coatings prepared in example 2 and comparative examples 1 to 4
As is clear from the results in table 2, the coating layer was not good in heat insulating effect and substantially no heat insulating effect as compared with example 2 in comparative example 1 in which only the modified silicate was added. In comparative example 2, the material added with the unmodified silicate and the hollow glass beads has the advantages that the salt spray resistance of the coating can form wider corrosion and rust spots, the hardness is lower, and the heat insulation effect is also poor, because the coating does not form a continuous and compact curing layer, and the light reflection effect is also weakened. The reduction of the addition amount of the emulsion in the comparative example 3 can weaken the salt spray resistance and the ageing resistance of the coating, and the adhesive force of the coating is also greatly reduced, because the inorganic material has larger volume shrinkage in the curing process, fine cracks can be caused, and the addition of a proper amount of the emulsion can play a role in bonding and filling the cracks. The preparation process of comparative example 4 is not pre-mixed, so that various performances are reduced to a certain extent, and the pre-mixing can lead the resin matrix to react with the hollow glass beads in advance to form long-chain bodies, thereby reinforcing the coating structure.
The market brand 1 is a reflective heat-insulating coating of a certain multiple brand which is purchased on line, the main materials of the reflective heat-insulating coating are emulsion and hollow glass beads, and the coating performance is mainly reflected in the aspect of heat insulation, and the salt spray resistance and the ageing resistance are relatively poor. The brand 2 of the market is a coating for bridge steel structures of a certain paint brand purchased on the internet, the main materials are epoxy resin and zinc powder, the coating performance is mainly characterized by salt spray resistance and ageing resistance, but the performances in all aspects are not very good, and the heat insulation performance is basically not good.
In summary, the adhesion test of the anti-rust heat-insulating paint coating is 5B grade, the anti-corrosion and anti-rust performance is 960h, the corrosion width is less than 2mm, no rust spots exist, and the result is shown in figure 2, the aging resistance is 500h, no foaming, no cracking and no obvious powder falling exist; the heat insulation temperature difference between the coating and the back surface of the color steel plate is about 10.3 ℃, the outdoor temperature and the indoor temperature difference can reach about 5.2 ℃, and the schematic drawing of the coating mode is shown in figure 1.
According to the antirust heat-insulating coating disclosed by the invention, the potassium silicate and the silica sol are mixed and modified, and then the alkali etching modification treatment is carried out on the coating and the hollow glass beads, so that the adhesive force and the anticorrosion and antirust properties of the coating can be enhanced, the durability and the temperature resistance of the coating are better, in addition, the coating also has a good heat-insulating effect on solar irradiation, the energy consumption of an air conditioner is reduced, and the working environment of workers is improved. In construction, the modified silicate has strong permeability and water resistance, so that the surface drying time is faster than that of the water-based industrial paint, and the secondary construction efficiency of constructors is greatly improved.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The antirust heat-insulating coating is characterized by comprising the following raw materials in parts by weight:
cellulose ether 0.3-0.6 part;
0.3 to 0.7 part of dispersing agent;
0.3 to 0.5 part of wetting agent;
0.3 to 0.5 part of defoaming agent;
0.5 to 1 part of stabilizer;
0.2 to 0.5 part of anti-settling agent;
10-30 parts of heavy calcium carbonate;
10-20 parts of titanium dioxide;
3-10 parts of mica powder;
0.5 to 1 part of flash rust inhibitor;
5-10 parts of acrylic emulsion;
25-45 parts of modified silicate and hollow glass bead materials;
0.3-1 part of thickener;
18-25 parts of water.
2. The antirust heat-insulating coating according to claim 1, wherein the modified silicate and the hollow glass bead material are synthesized through two steps of modification of silicate and modification of hollow glass beads.
3. The antirust heat-insulating coating according to claim 2, wherein the modification preparation method of the silicate comprises the following steps:
mixing silicate, silica sol, an organosilicon coupling agent and a stabilizer, and heating and stirring to obtain a modified silicate solution;
preferably, the organosilicon coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane; preferably, the temperature of the heating treatment is 50-75 ℃; preferably, the stirring time is 30-60 min.
4. The antirust heat-insulating coating according to claim 2, wherein the modified preparation method of the hollow glass microspheres comprises the following steps:
pretreating the hollow glass beads, performing heat treatment, and adding the modified silicate to react to obtain a modified silicate and hollow glass bead material;
preferably, the mass ratio of the hollow glass beads to the modified silicate is 1: (2-3).
5. A method for preparing the antirust heat-insulating coating according to claims 1 to 4, characterized in that the preparation method comprises the following steps:
s1, weighing modified silicate, hollow glass bead materials and acrylic emulsion for pre-reaction;
s2, mixing and stirring cellulose ether, an anti-settling agent, a dispersing agent, a wetting agent, a defoaming agent, a stabilizing agent, heavy calcium carbonate, titanium dioxide, mica powder and an anti-flash rust agent;
and S3, mixing the products obtained in the step S1 and the step S2, adding a thickening agent, and stirring for reacting to obtain the antirust heat-insulating coating.
6. The method according to claim 5, wherein in the step S1, the step of pre-reacting is to put the modified silicate, the hollow glass bead material and the acrylic emulsion into a temperature-controlled reaction kettle for stirring reaction.
7. The preparation method according to claim 6, wherein the temperature in the temperature-controlled reaction kettle is 40-50 ℃; preferably, the stirring speed is 500-550 r/min; preferably, the stirring time is 30-40 min.
8. The method according to claim 5, wherein in the step S2, the stirring speed is 500-1000 r/min; preferably, the stirring time is 5-25 min.
9. The method according to claim 5, wherein in step S3, the stirring speed is 300 to 400r/min; preferably, the stirring time is 8-12 min.
10. Use of the antirust heat-insulating coating according to any one of claims 1 to 4 in the field of metal material protection.
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