CN115491106A - Epoxy furan glass flake daub and preparation and use methods thereof - Google Patents
Epoxy furan glass flake daub and preparation and use methods thereof Download PDFInfo
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- CN115491106A CN115491106A CN202211249078.8A CN202211249078A CN115491106A CN 115491106 A CN115491106 A CN 115491106A CN 202211249078 A CN202211249078 A CN 202211249078A CN 115491106 A CN115491106 A CN 115491106A
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- epoxy
- glass flake
- resin
- furan
- daub
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- 239000011521 glass Substances 0.000 title claims abstract description 93
- IHLWCCXTLOKDTO-UHFFFAOYSA-N 2,6-dioxabicyclo[3.1.0]hexa-1(5),3-diene Chemical compound C1=COC2=C1O2 IHLWCCXTLOKDTO-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 239000007849 furan resin Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000000945 filler Substances 0.000 claims abstract description 29
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 150000001875 compounds Chemical class 0.000 claims abstract description 14
- 239000003822 epoxy resin Substances 0.000 claims abstract description 13
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims description 32
- 238000000576 coating method Methods 0.000 claims description 32
- 238000010276 construction Methods 0.000 claims description 25
- JOLVYUIAMRUBRK-UHFFFAOYSA-N 11',12',14',15'-Tetradehydro(Z,Z-)-3-(8-Pentadecenyl)phenol Natural products OC1=CC=CC(CCCCCCCC=CCC=CCC=C)=C1 JOLVYUIAMRUBRK-UHFFFAOYSA-N 0.000 claims description 23
- YLKVIMNNMLKUGJ-UHFFFAOYSA-N 3-Delta8-pentadecenylphenol Natural products CCCCCCC=CCCCCCCCC1=CC=CC(O)=C1 YLKVIMNNMLKUGJ-UHFFFAOYSA-N 0.000 claims description 23
- FAYVLNWNMNHXGA-UHFFFAOYSA-N Cardanoldiene Natural products CCCC=CCC=CCCCCCCCC1=CC=CC(O)=C1 FAYVLNWNMNHXGA-UHFFFAOYSA-N 0.000 claims description 23
- PTFIPECGHSYQNR-UHFFFAOYSA-N cardanol Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1 PTFIPECGHSYQNR-UHFFFAOYSA-N 0.000 claims description 23
- 229920006122 polyamide resin Polymers 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 23
- 239000011347 resin Substances 0.000 claims description 23
- -1 cardanol alkylamine Chemical class 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 14
- 239000010445 mica Substances 0.000 claims description 11
- 229910052618 mica group Inorganic materials 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 9
- 239000010453 quartz Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 239000013521 mastic Substances 0.000 claims 3
- 239000002585 base Substances 0.000 abstract description 24
- 239000002253 acid Substances 0.000 abstract description 23
- 239000000126 substance Substances 0.000 abstract description 16
- 239000003513 alkali Substances 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 125000003700 epoxy group Chemical group 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical group C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 abstract description 4
- 238000001723 curing Methods 0.000 description 44
- 230000007797 corrosion Effects 0.000 description 28
- 238000005260 corrosion Methods 0.000 description 28
- 230000035699 permeability Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000010410 layer Substances 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 238000004381 surface treatment Methods 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 239000005388 borosilicate glass Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920000768 polyamine Polymers 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 229920002396 Polyurea Polymers 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- CUXYLFPMQMFGPL-UHFFFAOYSA-N (9Z,11E,13E)-9,11,13-Octadecatrienoic acid Natural products CCCCC=CC=CC=CCCCCCCCC(O)=O CUXYLFPMQMFGPL-UHFFFAOYSA-N 0.000 description 2
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 2
- JOLVYUIAMRUBRK-UTOQUPLUSA-N Cardanol Chemical compound OC1=CC=CC(CCCCCCC\C=C/C\C=C/CC=C)=C1 JOLVYUIAMRUBRK-UTOQUPLUSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000006683 Mannich reaction Methods 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- CUXYLFPMQMFGPL-SUTYWZMXSA-N all-trans-octadeca-9,11,13-trienoic acid Chemical compound CCCC\C=C\C=C\C=C\CCCCCCCC(O)=O CUXYLFPMQMFGPL-SUTYWZMXSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000012620 biological material Substances 0.000 description 2
- 235000020226 cashew nut Nutrition 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- GTUVXOOHBUUGBH-UHFFFAOYSA-N furan;methanol Chemical compound OC.C=1C=COC=1 GTUVXOOHBUUGBH-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013035 low temperature curing Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 150000003141 primary amines Chemical class 0.000 description 2
- 150000003335 secondary amines Chemical class 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000003784 tall oil Substances 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical group [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 150000002978 peroxides Chemical group 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/44—Amides
- C08G59/46—Amides together with other curing agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
- C08G59/623—Aminophenols
-
- 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
- C09D5/08—Anti-corrosive paints
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides epoxy furan glass flake daub and a preparation and use method thereof, wherein the daub comprises, by mass, 40-50 parts of a base material, 15-35 parts of an antirust filler, 30-40 parts of an inert filler, 1-3 parts of an anti-settling agent and 8-9 parts of a curing agent; epoxy furan resin for base material; the antirust filler adopts glass flakes. The high molecular compound synthesized by taking the furfuryl alcohol as the main raw material has low viscosity, more furan rings in structure, no low molecular compound release in the curing process, excellent strong acid resistance, strong alkali resistance and solvent resistance, higher heat resistance, continuous use temperature of more than 300 ℃, and high-polarity and active epoxy groups in the epoxy resin structure, can form chemical bonds with the metal surface, and has the characteristics of strong adhesive force and the like.
Description
Technical Field
The invention belongs to the field of corrosion protection, and aims to solve the problem that the existing chimney of a power plant adopts a limestone-gypsum wet flue gas desulfurization technology, and a part of units are not provided with a flue gas heat exchanger, so that a so-called wet chimney is generated, and dilute sulfuric acid seriously corrodes structural materials of an inner barrel of the chimney.
Background
With the increasingly strict requirements for environmental protection in China, most of the constructed chimneys are provided with flue gas desulfurization equipment, and the wet desulphurization (FGD) process without a flue gas heating system (GGH) is generally adopted by all the large power generation companies at present. After the flue gas is subjected to wet desulphurization, although SO in the flue gas 2 Is greatly reduced, but the method is used for treating SO in the flue gas 3 The desulfurization effect of (2) is not good. After wet desulphurization, the smoke is moderately increased, the temperature is reduced, the smoke is easy to condense on the inner wall of the chimney, and residual SO in the smoke is generated 3 And corroding the inner wall of the chimney by using a dilute sulfuric acid solution formed after dissolution.
At present, the chimney inner cylinder anticorrosion technology after wet desulphurization at home and abroad mainly refers to a foreign technical method for reference, and the following 3 protective measures are mostly adopted: (1) The lining is made of an acid-resistant and corrosion-resistant metal plate, and the lining material mainly comprises a nickel-based alloy plate, hastelloy, a titanium steel plate and the like. The schemes have the advantages that the problems of temperature resistance, stress change resistance, corrosion resistance and the like are solved; the defects are that the cost is extremely high, the construction welding technology is very difficult, and the corrosion is easy to start from the welding seam; (2) The contact between the smoke and the inner cylinder of the chimney is isolated by adopting the adhesion of a corrosion-resistant light heat-insulating product, such as an acid-resistant foam vitrified brick, but the construction cost is very high, the period is long, and the reconstruction of an old chimney is particularly difficult to realize; (3) The acid-resistant daub, the polyurea coating, the vinyl daub and the like are prepared by mixing water glass and acid-resistant cement, and the acid-resistant daub has good sintering property, corrosion resistance, acid resistance, low manufacturing cost and alkali resistance. Practical application proves that the anticorrosive protection effect is poor, and the anticorrosive material is eliminated in the field of chimney corrosion prevention; the polyurea coating has no seam, good compactness, rapid drying and short construction period. But the polyurea has limited high temperature resistance, is aged more quickly at the temperature of more than 60 ℃, is easy to fall off at high temperature and has short anticorrosion protection period; the vinyl daub has the advantages of good acid resistance and permeability resistance, convenient construction and lower cost; the defects of poor toughness, easy brittleness, easy falling off under sudden temperature change, large construction taste, large danger and high requirement on construction environment because the curing agent is peroxide.
Disclosure of Invention
Aiming at the problem that the chimney of each large power generation company generally adopts a wet desulphurization (FGD) process without adding a flue gas heating system (GGH) and the corrosion of dilute sulfuric acid to structural materials is serious, the epoxy furan glass flake daub and the preparation and use methods thereof can solve the problem of corrosion resistance of the inner barrel of the chimney after the wet desulphurization.
The above object of the present invention is achieved by the following technical means:
the epoxy furan glass flake daub for the chimney of the power plant comprises, by mass, 40-50 parts of a base material, 15-35 parts of an antirust filler, 30-40 parts of an inert filler, 1-3 parts of an anti-settling agent and 8-9 parts of a curing agent; the base material is epoxy furan resin; the antirust filler adopts glass flakes, and the curing agent adopts at least one of polyamide resin and cardanol alkylamine resin.
Preferably, the epoxy furan resin is obtained by mixing the E-20 epoxy resin and the furan resin in a mass ratio of (6. The furan resin is a high molecular compound synthesized by taking furancarbinol as a main raw material, has low viscosity, is a thermosetting resin, has more furan rings in structure, does not release low molecular compounds in the curing process, has excellent strong acid resistance, strong base resistance and solvent resistance, has higher heat resistance, can reach the continuous use temperature of more than 300 ℃, but has poor drying property and mechanical property. The epoxy resin structure contains high-polarity and active epoxy groups, can form chemical bonds with the metal surface, and has the characteristics of strong adhesive force and the like. Therefore, the modified resin obtained by mixing the epoxy resin and the furan resin overcomes the defects of high brittleness and poor bonding strength of the furan resin, and integrates the advantages of the epoxy resin and the furan resin, such as excellent acid resistance, alkali resistance and high temperature resistance, excellent adhesive force, curability of a wet surface, strong permeability, high curing speed and the like.
Preferably, the furan resin in the base epoxy furan resin is a high molecular compound synthesized by taking furancarbinol as a raw material.
Preferably, the borosilicate glass flakes subjected to surface treatment by the silane coupling agent are selected as the glass flakes, and the thickness of the borosilicate glass flakes is 2-5 microns.
Preferably, the glass flakes have an "aspect ratio", i.e., flake diameter/flake thickness, of 35.
The antirust filler adopts the glass flakes, the parallel orientation of the glass flakes and the base material in the coating layer achieves extremely high moisture impermeability, the glass flakes have high aspect ratio (length-to-thickness ratio) and corrosive components penetrate into the surface of the base material from the outside and need to pass through a long and tortuous 'road', so that the corrosion resistance is improved. In addition, the glass has high hardness and strong chemical inertness, and can improve the wear resistance, chemical resistance, heat resistance and fire resistance. The selection of the glass flake needs to take the corrosion resistance and the construction performance into consideration, and the borosilicate glass flake subjected to surface treatment by the silane coupling agent is generally selected, and the thickness of the borosilicate glass flake is 2-5 mu m. The sheet diameter of the glass scale directly influences the permeability resistance of the coating, the water vapor permeability and the boiling water absorption are reduced along with the increase of the sheet diameter of the scale, and the scale with large aspect ratio of the glass scale has better water resistance. However, as the aspect ratio of the scale increases, the air discharge capacity is deteriorated, the spraying is difficult, the construction progress is influenced, and the surface of the coating is rough, so that the appearance quality is influenced. Therefore, the comprehensive evaluation of the corrosion resistance, the spraying construction performance, the appearance and the like of the glass flakes of 200 meshes is better. The content of the glass flakes is closely related to the corrosion resistance of the coating, and the permeability of the coating is improved along with the increase of the content of the glass flakes; however, if the amount of the glass flakes is increased after a certain amount is reached, the permeability of the coating is not obviously improved, and if the excessive glass flakes are irregularly accumulated in the coating, the defects of gaps, air holes and the like are formed in the coating, so that the compactness of the coating is influenced, and the corrosion resistance is influenced. Therefore, the content of the glass flake is 15-35%, and better medium permeability resistance can be obtained.
Preferably, the inert filler is selected from mica powder, talcum powder and quartz powder and is mixed according to the mass ratio of 1. The average particle size of the mica powder is 13 mu m, the residue of a 400-mesh sieve is less than or equal to 0.2 percent, the whiteness is more than or equal to 77 percent, the oil absorption is 35-42g/100g, and the PH value is as follows: 6-8. The preparation process comprises the following steps: adding the epoxy furan resin into a stirring tank, starting stirring at the rotating speed of 500-700rpm, adding the mica powder according to the formula, adjusting the rotating speed to 1000-1200rpm for high-speed dispersion for 5 minutes, then adding the talcum powder and the quartz powder, and adding the next material after each material is added and the high-speed dispersion is carried out for 5 minutes.
The mica powder is in a two-dimensional sheet structure and is in a layer-by-layer superposed structure, the aspect ratio (sheet diameter/sheet thickness) is 30, and the mica powder has the advantages of good toughness, insulativity, high temperature resistance, acid and alkali resistance, corrosion resistance, low thermal conductivity and the like. The talcum powder is a magnesium silicate mineral, has stable chemical property, is resistant to acid and alkali erosion, and plays a role in filling and reinforcing in the daub. The quartz powder is a silicate mineral and has the characteristics of hardness, wear resistance, stable chemical property, acid and alkali resistance, corrosion resistance and the like. From the characteristic of corrosion resistance, the mica powder is superior to quartz powder, and the talcum powder is the worst of the mica powder, the quartz powder and the talcum powder; from an economic point of view, talc powder is superior to quartz powder, mica powder being the most expensive of the three. Therefore, the mica powder, the talcum powder and the quartz powder are mixed together according to the mass ratio of 1.
Preferably, the anti-settling agent is organic bentonite.
Preferably, the curing agent is a mixture of polyamide resin and cardanol alkylamine resin.
The polyamide resin curing agent is prepared by polycondensation of dimer of unsaturated fatty acid (such as linoleic acid, eleostearic acid or tall oil acid) of vegetable oil and polyamine. The polyamide resin curing agent has excellent adhesion to various base materials, very large peel strength and good wettability. The curing process is realized by reacting primary and secondary amine hydrogen at the tail end of the polyamide with an epoxy group. The cured paint film has excellent toughness and water resistance, but has poor chemical resistance and solvent resistance and low curing activity.
The cardanol alkylamine resin curing agent is derived from cardanol, a liquid resin-CNSL extracted from cashew nut shells. CNSL is a natural, non-food, sustainable, renewable biomaterial. The cardanol alkylamine curing agent is prepared by a Mannich reaction (condensation reaction of phenol, formaldehyde and polyamine). The cardanol alkylamine curing agent has phenolic hydroxyl, and under the combined action of the catalytic effect of the phenolic hydroxyl and the steric hindrance of the long unsaturated fatty side chain, fatty amine and an epoxy compound are subjected to chemical reaction to form a high polymer film with excellent anticorrosion performance. The cardanol alkylamine curing agent has low viscosity, low VOC and solid content of 100%, and has good low-temperature curing performance, excellent corrosion resistance and excellent low-surface treatment performance. Provides rapid bond strength development on a variety of substrates under harsh conditions of cold temperature and humid environments (even underwater). Furthermore, good adhesion is exhibited even on untreated surfaces, reducing the risk of application failure.
Preferably, the mixed epoxy furan glass flake daub has a solid content of more than 95%, has low VOC, is quick-drying, has excellent chemical resistance such as acid resistance, alkali resistance and the like, has excellent corrosion resistance and high permeability, and can completely solve the problem of corrosion resistance of the inner cylinder of the chimney caused by dilute sulfuric acid after wet desulphurization.
The preparation method comprises the following steps:
the preparation method of the epoxy furan glass flake daub for the chimney of the power plant is characterized by comprising the following steps of:
sequentially adding the base material, the inert filler, the glass flakes and the anti-settling agent into a tank, uniformly stirring, and dispersing at a high speed until the fineness is qualified to obtain an epoxy furan glass flake daub A component;
adding a curing agent and a solvent into the other tank, and uniformly stirring to obtain a component B of the epoxy furan glass flake daub;
during construction, the epoxy furan glass flake daub is constructed after the component A and the component B are fully mixed according to the proportion, and the epoxy furan glass flake daub is obtained.
The invention provides a using method of epoxy furan glass flake daub for power plant chimneys, which comprises the following steps:
and coating the epoxy furan glass flake daub for the power plant chimney on the surface of the workpiece to be coated to form a coating on the surface of the workpiece to be coated, standing until the coating is dried, and curing for 7 days and then measuring the performance of the coating.
The invention has the following beneficial effects:
the furan resin in the base material epoxy furan resin used in the invention is a high molecular compound synthesized by taking furan methanol (furfuryl alcohol) as a main raw material, has low viscosity, is a thermosetting resin, has more furan rings in structure, does not release low molecular compounds in the curing process, has excellent strong acid resistance, strong alkali resistance and solvent resistance, has higher heat resistance, and has continuous use temperature of more than 300 ℃, but has poor drying property and mechanical property. The epoxy resin structure contains high-polarity and active epoxy groups, can form chemical bonds with the surface of metal, and has the characteristics of strong adhesive force and the like. Therefore, the modified resin obtained by mixing the epoxy resin and the furan resin overcomes the defects of high brittleness and poor bonding strength of the furan resin, and integrates the advantages of the epoxy resin and the furan resin, such as excellent acid resistance, alkali resistance and high temperature resistance, excellent adhesive force, curability of a wet surface, strong permeability, high curing speed and the like.
The antirust filler adopts glass flakes, the parallel orientation of the glass flakes and the base material in the coating achieves extremely high moisture impermeability, the glass flakes have high aspect ratio (length-to-thickness ratio) and corrosive components penetrate into the surface of the base material from the outside and need to pass through a long and tortuous 'road', so that the corrosion resistance is improved. In addition, the glass has high hardness and strong chemical inertness, and can improve the wear resistance, chemical resistance, heat resistance and fire resistance. The selection of the glass flake needs to take the corrosion resistance and the construction performance into consideration, and the borosilicate glass flake which is subjected to surface treatment by the silane coupling agent is generally selected and has the thickness of 2-5 mu m. The sheet diameter of the glass flakes directly influences the permeation resistance of the coating, the water vapor permeability and the boiling water absorption are reduced along with the increase of the sheet diameter of the flakes, and the water resistance of the flakes with large aspect ratio of the glass flakes is better. However, as the aspect ratio of the scale is increased, the air discharge capacity is deteriorated, the spraying is difficult, the construction progress is influenced on one hand, and the surface of the coating is rough on the other hand, so that the appearance quality is influenced. Therefore, the comprehensive evaluation of the corrosion resistance, the spraying construction performance, the appearance and the like of the glass flake with 200 meshes is better.
The daub can be used as low-viscosity epoxy seal primer in concrete coating, can deeply permeate into loose cement or concrete, seals pores in the loose cement or concrete after reaction and curing, anchors a loose bottom layer, greatly enhances the surface strength of a base material, and improves the interlayer adhesive force with intermediate paint.
Detailed Description
The present invention is further described below with reference to examples.
The epoxy furan glass flake daub for the power plant chimney comprises the following components in parts by weight: 40-50 parts of base material, 15-35 parts of glass flake, 30-40 parts of inert filler, 1-3 parts of anti-settling agent and 8-9 parts of curing agent.
The base material adopts epoxy furan resin, and the epoxy furan resin is obtained by matching E-20 epoxy resin and furan resin according to the mass ratio of (6.
The antirust filler adopts glass flakes, the glass flakes are borosilicate subjected to surface treatment by a silane coupling agent, and the thickness of the glass flakes is 2-5 mu m.
The inert filler is prepared by mixing mica powder, talcum powder and quartz powder according to a mass ratio of 1.
The anti-settling agent adopts organic bentonite, and the curing agent adopts at least one of polyamide resin and cardanol alkylamine resin.
The preparation method of the epoxy furan glass flake daub for the power plant chimney comprises the following steps:
step 1: sequentially adding the base material, the inert filler, the glass flakes and the anti-settling agent into a tank, uniformly stirring, and dispersing at a high speed of 2000-3000rpm for 1-1.5 hours until the fineness is qualified to obtain an epoxy furan glass flake daub A component;
step 2: adding a curing agent and a solvent into the other tank, and uniformly stirring to obtain a component B of the epoxy furan glass flake daub;
and 3, step 3: during construction, the epoxy furan glass flake daub is constructed after the component A and the component B are fully mixed according to the proportion, and the epoxy furan glass flake daub is obtained.
When the epoxy furan glass flake daub for the chimney of the power plant is used, the daub is uniformly scraped and coated on a metal workpiece to be coated to form a coating on the surface of the workpiece to be coated, and then the daub is kept stand until the coating is completely dried. When in use, the dry film thickness of the primer layer is controlled to be 100-120 μm, and the performance of the primer layer is measured after curing for 7 days.
The invention mainly aims at harsh service environment with high corrosion characteristic, the furan resin in the epoxy furan resin used as the base material is a high molecular compound synthesized by taking furfuryl alcohol (furfuryl alcohol) as a main raw material, has low viscosity, is a thermosetting resin, has more furan rings in structure, does not release low molecular compounds in the curing process, has excellent strong acid resistance, strong alkali resistance and solvent resistance, has higher heat resistance, has continuous use temperature of more than 300 ℃, but has poor drying property and mechanical property. The epoxy resin structure contains high-polarity and active epoxy groups, can form chemical bonds with the metal surface, and has the characteristics of strong adhesive force and the like. Therefore, the modified resin obtained by mixing the epoxy resin and the furan resin overcomes the defects of high brittleness and poor bonding strength of the furan resin, and integrates the advantages of the epoxy resin and the furan resin, such as excellent acid resistance, alkali resistance and high temperature resistance, excellent adhesive force, curability of a wet surface, strong permeability, high curing speed and the like.
The antirust filler adopts the glass flakes, the parallel orientation of the glass flakes and the base material in the coating layer achieves extremely high moisture impermeability, the glass flakes have high aspect ratio (length-to-thickness ratio) and corrosive components need to pass through a long and tortuous 'road' when permeating into the surface of the base material from the outside, so that the corrosion resistance is improved. In addition, the glass has high hardness and strong chemical inertness, and can improve the wear resistance, chemical resistance, heat resistance and fire resistance. The selection of the glass flake needs to take the corrosion resistance and the construction performance into consideration, and the borosilicate glass flake which is subjected to surface treatment by the silane coupling agent is generally selected and has the thickness of 2-5 mu m. The sheet diameter of the glass flakes directly influences the permeation resistance of the coating, the water vapor permeability and the boiling water absorption are reduced along with the increase of the sheet diameter of the flakes, and the water resistance of the flakes with large aspect ratio of the glass flakes is better. However, as the aspect ratio of the scale increases, the air discharge capacity is deteriorated, the spraying is difficult, the construction progress is influenced, and the surface of the coating is rough, so that the appearance quality is influenced. Therefore, the comprehensive evaluation of the corrosion resistance, the spraying construction performance, the appearance and the like of the glass flake with 200 meshes is better.
The curing agent adopts a mixture of polyamide resin and cardanol alkylamine resin.
The polyamide resin curing agent is prepared by polycondensation of dimer of unsaturated fatty acid (such as linoleic acid, eleostearic acid or tall oil acid) of vegetable oil and polyamine. The polyamide resin curing agent has excellent adhesion to various base materials, very large peel strength and good wettability. The curing process is carried out by reacting the primary and secondary amine hydrogen at the end of polyamide with epoxy group. The cured paint film has excellent toughness and water resistance, but has poor chemical resistance and solvent resistance and low curing activity.
Cardanol alkylamine resin is prepared from cardanol, a liquid resin extracted from cashew nut shell, CNSL. CNSL is a natural, non-food, sustainable, renewable biomaterial. The cardanol alkylamine curing agent is prepared by a mannich reaction (condensation reaction of phenol, formaldehyde and polyamine). Under the combined action of the catalytic effect of phenolic hydroxyl and the steric hindrance of long unsaturated fatty side chains, fatty amine and epoxy compound are subjected to chemical reaction to form a high polymer film with excellent anticorrosion performance. Therefore, the cardanol alkylamine curing agent has low viscosity, low VOC and solid content of 100 percent, and has good low-temperature curing performance, excellent corrosion resistance, high permeability and excellent low surface treatment performance. Provides rapid development of bond strength in a variety of substrates under harsh conditions of cold temperature and humid environments (even underwater). Furthermore, good adhesion is exhibited even on untreated surfaces, reducing the risk of application failure.
Example 1
The daub comprises the following components in percentage by mass: 40 parts of epoxy furan resin, 30 parts of inert filler, 15 parts of antirust filler glass flakes, 1 part of anti-settling agent and 8 parts of curing agent polyamide resin.
The preparation and application method of the primer of the embodiment comprises the following steps:
step 1: sequentially adding the base material, the inert filler, the glass flakes and the anti-settling agent into a tank, uniformly stirring, and dispersing at a high speed of 2000-3000rpm for 1-1.5 hours until the fineness is qualified to obtain an epoxy furan glass flake daub A component;
step 2: adding polyamide resin and a solvent into the other tank, and uniformly stirring to obtain a component B of the epoxy furan glass flake daub;
and step 3: during construction, the epoxy furan glass flake daub is obtained by fully mixing the component A and the component B according to the proportion and then performing construction.
And 4, step 4: and uniformly scraping and coating the daub on the metal workpiece to be coated.
And 5: and (5) standing the test piece obtained in the step (4) at room temperature until the coating is completely dried. When in use, the dry film thickness of the primer layer is controlled to be 100-120 mu m, and the performance of the primer layer is measured after curing for 7 days.
Example 2
The daub comprises the following components in percentage by mass: 45 parts of epoxy furan resin, 35 parts of inert filler, 20 parts of antirust filler glass flakes, 2 parts of anti-settling agent and 8.5 parts of curing agent polyamide resin.
The preparation and application method of the primer of the embodiment comprises the following steps:
step 1: sequentially adding the base material, the inert filler, the glass flakes and the anti-settling agent into a tank, uniformly stirring, and dispersing at a high speed of 2000-3000rpm for 1-1.5 hours until the fineness is qualified to obtain a component A of the epoxy furan glass flake daub;
step 2: adding polyamide resin and a solvent into the other tank, and uniformly stirring to obtain a component B of the epoxy furan glass flake daub;
and step 3: during construction, the epoxy furan glass flake daub is obtained by fully mixing the component A and the component B according to the proportion and then performing construction.
And 4, step 4: and uniformly scraping and coating the daub on the metal workpiece to be coated.
And 5: and (4) standing the test piece in the step 4 at room temperature until the coating is completely dry. When in use, the dry film thickness of the primer layer is controlled to be 100-120 mu m, and the performance of the primer layer is measured after curing for 7 days.
Example 3
The daub comprises the following components in percentage by mass: 50 parts of epoxy furan resin, 40 parts of inert filler, 30 parts of antirust filler glass flakes, 3 parts of anti-settling agent and 9 parts of curing agent polyamide resin.
The preparation and application method of the primer of the embodiment comprises the following steps:
step 1: sequentially adding the base material, the inert filler, the glass flakes and the anti-settling agent into a tank, uniformly stirring, and dispersing at a high speed of 2000-3000rpm for 1-1.5 hours until the fineness is qualified to obtain an epoxy furan glass flake daub A component;
and 2, step: adding polyamide resin and a solvent into the other tank, and uniformly stirring to obtain an epoxy furan glass flake daub component B;
and 3, step 3: during construction, the epoxy furan glass flake daub is obtained by fully mixing the component A and the component B according to the proportion and then performing construction.
And 4, step 4: and uniformly scraping and coating the daub on the metal workpiece to be coated.
And 5: and (4) standing the test piece in the step 4 at room temperature until the coating is completely dry. When in use, the dry film thickness of the primer layer is controlled to be 100-120 mu m, and the performance of the primer layer is measured after curing for 7 days.
Example 4
The procedure and the amount of each component were the same as in example 1 except that the curing agent was cardanol alkylamine resin.
Example 5
The steps and the use amount of each component are the same as those of the embodiment 1, and the difference is that the curing agent is a composite of polyamide resin and cardanol alkylamine resin with the mass ratio of 1.
Example 6
The steps and the use amount of each component are the same as those of the embodiment 1, and the difference is that the curing agent is a polyamide resin and cardanol alkylamine resin compound with the mass ratio of 1.
Example 7
The steps and the use amount of each component are the same as those of the embodiment 1, and the difference is that the curing agent is a polyamide resin and cardanol alkylamine resin compound with the mass ratio of 3.
TABLE 1 Properties of the cements
Through a large number of experiments and comparison of the above examples, it is found that when a polyamide resin is mixed with a cardanol alkylamine resin as a curing agent, the cardanol alkylamine resin has a high proportion, although the acid and alkali resistance can be improved, the adhesion is poor; when the polyamide resin ratio is high, the adhesion can be improved, but the acid resistance of the cement is poor. The curing agent prepared by mixing the polyamide resin and the cardanol alkylamine resin according to the mass ratio of 1.
The construction process is feasible, the cost is low, the daub prepared according to the component proportion has excellent mechanical property, excellent chemical properties such as acid resistance, alkali resistance and the like, high permeability and temperature resistance, can resist strong corrosive substances such as wet flue gas, low-temperature high-humidity dilute sulfuric acid and the like after wet desulphurization treatment of a chimney of an electric power plant, has long protection period, and meets the requirement of an inner barrel of the chimney of the electric power plant on corrosion resistance.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention. In addition to the above examples, the present invention can be variously embodied. All technical solutions formed by equivalent substitutions fall within the scope of the present invention as claimed.
Claims (10)
1. The epoxy furan glass flake daub is characterized by comprising, by mass, 40-50 parts of a base material, 15-35 parts of an antirust filler, 30-40 parts of an inert filler, 1-3 parts of an anti-settling agent and 8-9 parts of a curing agent; the base material is epoxy furan resin; the antirust filler adopts glass flakes, and the curing agent adopts at least one of polyamide resin and cardanol alkylamine resin.
2. The epoxy furan glass flake daub as claimed in claim 1, wherein the epoxy furan resin is obtained by blending an E-20 epoxy resin and a furan resin in a mass ratio of (6.
3. The epoxy furan glass flake daub of claim 1, wherein the furan resin in the base epoxy furan resin is a high molecular compound synthesized from furfuryl alcohol.
4. The epoxy furan glass flake daub of claim 1, wherein the glass flakes are borosilicate surface treated with a silane coupling agent and have a thickness of 2 to 5 μm.
5. The epoxy furan glass flake mastic of claim 4, wherein the glass flakes have an aspect ratio of 35.
6. The epoxy furan glass flake daub as claimed in claim 1, wherein the inert filler is selected from mica powder, talcum powder and quartz powder which are mixed according to a mass ratio of 1.
7. The epoxy furan glass flake daub of claim 1, wherein the anti-settling agent is an organobentonite.
8. The epoxyfuran glass flake daub of claim 1 wherein said curing agent is a mixture of polyamide resin and cardanol alkylamine resin.
9. The method for preparing the epoxy furan glass flake mastic of any one of claims 1-8, characterized by comprising the following steps:
sequentially adding the base material, the inert filler, the glass flakes and the anti-settling agent into a tank, uniformly stirring, and dispersing at a high speed until the fineness is qualified to obtain an epoxy furan glass flake daub A component;
adding polyamide resin, cardanol alkylamine resin and a solvent according to a set proportion into another tank, and uniformly stirring to obtain a component B of the epoxy furan glass flake daub;
during construction, the epoxy furan glass flake daub is constructed after the component A and the component B are fully mixed according to the proportion, and the epoxy furan glass flake daub is obtained.
10. The method of using the epoxy furan glass flake mastic of any one of claims 1-8, characterized by comprising the following process:
and coating the epoxy furan glass flake daub on the surface of the workpiece to be coated to form a coating on the surface of the workpiece to be coated, standing until the coating is completely dried, and curing for 7 days to measure the performance of the coating.
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Application publication date: 20221220 |