CN106116330A - A kind of ultrathin dry powder fire-resistant coating for steel structure - Google Patents
A kind of ultrathin dry powder fire-resistant coating for steel structure Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/0666—Polycondensates containing five-membered rings, condensed with other rings, with nitrogen atoms as the only ring hetero atoms
- C08G73/0677—Polycondensates containing five-membered rings, condensed with other rings, with nitrogen atoms as the only ring hetero atoms with only two nitrogen atoms in the ring
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
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- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00525—Coating or impregnation materials for metallic surfaces
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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Abstract
The invention discloses a kind of ultrathin dry powder fire-resistant coating for steel structure, count by weight proportion, including following component: white cement, kieselguhr, calcined kaolin, hydrophilic silicon oxides, polyoxyethylene polyoxy propanol amidogen ether, polymer modification graphene oxide, sulfonate polybenzimidazole modification mesoporous silicon, KH 560 and drift-sand.It is excellent that described ultrathin dry powder fire-resistant coating for steel structure has fire protecting performance, and adhesive force is strong, wearability good, have excellent weatherability and resistance to water, shielding property are good and the advantage such as the smooth exquisiteness in coating top layer and environmental protection.
Description
Technical field
The invention belongs to technical field of coatings, particularly relate to a kind of ultrathin dry powder fire-resistant coating for steel structure.
Background technology
Along with the development of large-and-medium size cities, steel construction has become as a critically important Application in Building material, and should
In Standard Factory Room, large-scale stadium, airport, bridge, multi-storied garage and core building.But the critical temperature of steel is
540 DEG C, fire resistance and can not show a candle to brick mix structure, reach this temperature, its bearing capacity will reduce about half.General
In fire, about 15min i.e. can reach this temperature, thus causes caving in of building.This characteristic determines steel construction and builds
Build thing and must take corresponding fire prevention measure, it will usually at steel structure surface brushing fireproof coating to ensure its fire resistance.This
Outward, for core building, during such as nuclear power station, it is also desirable to above-mentioned fireproof coating is provided simultaneously with the function of radioprotective, so can keep away
Exempt to use stereotype, both reduced cost, the generation of poisoning can be reduced again.
Widely apply in the fire prevention of current domestic steel building is super-thin steel structure fire-proof paint, and such coating is molten
Dosage form.Solvent-borne type fireproof coating discharges a large amount of organic solvent during there is production and construction, to surrounding and production and construction people
Member damages, the problem discharging a large amount of toxic gas during burning.Along with constantly perfecting of environmental regulation, solvent based coating will be more
More being restricted, and the fireproof coating with water as medium is due to Environmental Safety, pollutes few, easy construction and low cost etc. are excellent
Point, will progressively replace solvent based coating.But, the water super-thin steel structure fire-proof paint relatively solvent-borne type of current domestic appearance
There is a big difference in terms of fire-proof and thermal-insulation effect, adhesive force, dicoration and resistance to water for fireproof coating, can not replace in a lot of fields
The use of solvent-borne type super-thin steel structure fireproof coating.The water super-thin steel structure fireproof and radiation-proof coating of domestic current production is many
It is with conventional emulsion as film forming matter, such as styrene-acrylic emulsion, pure-acrylic emulsion, silicone acrylic emulsion, elastic emulsion etc..Prepared by this kind of film forming matter
Water super-thin steel structure fireproof and radiation-proof coating is relatively slow due to foaming, foams uneven, and the foaming persistent period is short, and alveolar layer will not
The shortcomings such as close, carbide is less, and charring layer thickness is relatively low, and carbonization is the most thorough, cause fire-proof and thermal-insulation effect not ideal enough, wearability
The most bad.This is also the main cause affecting water super-thin steel structure fireproof and radiation-proof coating property.And, existing aqueous
Super-thin steel structure fire-proof paint does not the most possess the function of radioprotective, it is difficult to use in core building.
Therefore, exploitation a kind of duration of fire resistance length, viscosity and adhesion strength is high, pollution-free, without fire hazard, production cost,
Production and construction is convenient, weatherability is good, wearability good and possesses the ultrathin dry powder fire-resistant coating for steel structure of good shielding property
It it is the art technology worker problem of needing solution badly.
Summary of the invention
In order to solve the problems referred to above, one aspect of the present invention provides a kind of ultrathin dry powder fire-resistant coating for steel structure, presses
Part by weight meter, including following component:
White cement 30 parts
Kieselguhr 5-10 part
Calcined kaolin 5-10 part
Hydrophilic silicon oxides 3-18 part
Polyoxyethylene polyoxy propanol amidogen ether 2-10 part
Polymer modification graphene oxide 2-10 part
Sulfonate polybenzimidazole modification mesoporous silicon 2-10 part
KH-560 3-10 part
Drift-sand 0-0.8 part；
Described polymer modification graphene oxide is prepared from by following methods:
(1) NTDA blocks the synthesis of poly-pyrrole throat prepolymer
In the three-necked bottle that 100mL is dried, it is sequentially added into the 3 of 10mmol, the Isosorbide-5-Nitrae of 3 '-diaminobenzidine DAB, 11mmol,
5,8-naphthalenetetracarbacidic acidic acid anhydride NTDA, 22 mmol benzoic acid, 3mL isoquinolin and 40mLm-cresol, logical nitrogen protection magnetic force
Stirring；After 2h, heat up 85 DEG C of reaction 6h, and 190 ° of C react 21h, and reaction is cooled to 70 DEG C and pours rapidly 150mL first into after terminating
In alcohol, obtain a large amount of solid precipitation；After this product of methanol cyclic washing, sucking filtration collected polymer, in vacuum drying oven,
160 DEG C of dry 20 h are stand-by；
(2) synthesis of amino-terminated sulfonated polyimide prepolymer
In the three-necked bottle that 100mL is dried, be sequentially added into 1.6 mmol 2,2 '-bis-(4-sulfonic benzo epoxide) benzidines,
12.5 mL m-creso1 and 0.8 mL triethylamine, logical nitrogen protection magnetic agitation；Treat 2,2 '-bis-(4-sulfonic benzo epoxides)
After benzidine is completely dissolved, sequentially add 1.5 mmol 3,4,9,10-tetracarboxylic anhydrides, 3.0mmol benzoic acid and
0.6mL isoquinolin；After 1h is stirred at room temperature, heat up 80 DEG C of reaction 4h, 180 DEG C of reaction 20h；After reaction terminates, it is down to room temperature, treats
Carry out next step reaction；
(3) block copolymerization reaction
The NTDA poly-pyrrole throat prepolymer of end-blocking that 0.095 mmol step (1) obtains it is directly added in the reaction solution of step (2)
With 4mL m-Creso1, after leading to nitrogen and 1h being stirred at room temperature, heat up 180 DEG C of reaction 20h；Reaction is cooled to 80 DEG C also after terminating
Pour into rapidly in 150mL methanol, obtain a large amount of thread product；After this product of methanol cyclic washing, sucking filtration collected polymer,
In vacuum drying oven, 130 DEG C of dry 10h obtain amino-terminated block copolymer；
(4) in the beaker of 200mL, above-mentioned amino-terminated block copolymer 3g, dimethyl sulfoxide 150mL are added, 80 DEG C of stirrings
After dissolving, add KH-560 5g, graphene oxide 10g and be warming up to 80 DEG C of stirring mixing 2 hours；Then pour the mixture into
In deionized water, and filter, filter cake is obtained polymer modification graphene oxide in 4 hours 120 DEG C of vacuum drying；
The preparation method of described sulfonate polybenzimidazole modification mesoporous silicon is:
By 0.1 mole 3,3 '-diaminobenzidine is first dissolved in 1000 grams of polyphosphoric acids containing 86wt% phosphorus pentoxide,
Then the 5-amino isophthalic acid of 0.05 mole and the 5-sulfonic group M-phthalic acid of 0.04 mole are joined reactant liquor
In, after 210 DEG C of reactions 15 hours, it is down to room temperature, in precipitating to water, then neutralizes with ammonia, filter, vacuum at 120 DEG C
It is dried, obtains amino-terminated sulfonate polybenzimidazole prepolymer；
In the metal reaction container with agitator, thermometer and condensing tube of 1000 mL add deionized water 100 mL,
After KH-560 1.5g, under agitation it is slowly added into mesoporous silicon MCM-41 20g, filters after reacting 30 minutes under room temperature
To silane-modified mesoporous silicon；
Described amino-terminated sulfonate polybenzimidazole prepolymer 1.8g, dimethyl sulfoxide 150mL is added in the beaker of 300mL,
After 75 DEG C of stirring and dissolving, add above-mentioned silane-modified mesoporous silicon 15g and be warming up to 80 DEG C of stirring mixing 3 hours；Then will be mixed
Compound is poured in deionized water, and filters, and filter cake is obtained polybenzimidazoles modification in 12 hours 110 DEG C of vacuum drying mesoporous
Silicon.
Another aspect of the present invention provides the preparation method of a kind of ultrathin dry powder fire-resistant coating for steel structure, including: will
After described material component is sufficiently mixed 10 minutes in adding mixer, discharging obtains.
Compared with prior art, the invention have the benefit that
1, poly-pyrrole throat has the weatherability of excellence, higher intensity, good fire resistance and the wearability of excellence, but one
As poly-pyrrole throat not there is good processing characteristics, and difficult the most compatible with other material in system, by poly-with sulfonation
The method of acid imide block polymerization, and introduce sulfonic group at side chain, the compatibility and processing problems can be efficiently solved, in a large number
The existence of amino, it is also possible to as the crosslinking points of system, be greatly improved mechanical strength, additionally, introduce phenylate structure at side chain, both
Wearability can be improved, again so that coating has bigger internal volume, increase the distance between strand, with further
Improve fire protecting performance and capability of resistance to radiation, by modifying graphene oxide, adhesion strength can be improved.Additionally, sulfonated polymer
Thing has good flocculability, cohesive and thickening property, and a large amount of sulfonic existence can significantly reduce free hydrogen in material
The content of calcium oxide, plays the generation of the accumulation of salt in the surface soil phenomenon on suppression cement mortar surface, sulfonic water absorption, it is also possible to prevent body
It was crisp, thus provided the Advantageous Effects of the present invention.
2, polybenzimidazoles has the alkali resistance of excellence, by sulfonation modified mesoporous silicon, can be greatly improved it at body
Dispersibility in system, and itself be also a kind of cross-linking agent, can perfectly be distributed in coating, improve intensity.Additionally, be situated between
Hole silicon self has substantial amounts of Micro porosity, can be effectively improved the radiation protection ability of system, thus provide having of the present invention
Benefit technique effect.
It is more readily understood the above-mentioned of the application and other features, aspect and advantage with reference to described further below.
Detailed description of the invention
Below by embodiment, the present invention is specifically described.Be necessary it is pointed out here that, following example are only used
In the invention will be further described, it is impossible to be interpreted as limiting the scope of the invention, professional and technical personnel in the field
Some nonessential improvement and adjustment that content according to the invention described above is made, still fall within protection scope of the present invention.
Raw material:
All tetramines, diacid are purchased from CTI, Sigma Aldrich, Alfa Aesar or SCRC, and directly use, it is not necessary to enter
One step purification.Hydrophilic silicon oxides is Cabot M-5.Mesoporous silicon is MCM-41 type, limited purchased from Nanjing Xian Feng nano material
Company.Epoxy silane coupling agent KH-560 is purchased from Chemical Reagent Co., Ltd., Sinopharm Group.Graphene oxide is purchased from the excellent zirconium in Suzhou
Nano material company limited, model is UG-S10.Other raw materials are purchased from Aladdin reagent company limited.
A1: white cement
B1: kieselguhr
C1: calcined kaolin
D1: calcium carbonate
E1: hydrophilic silicon oxides
F1: polymer modification graphene oxide, is prepared from by following methods:
(1) NTDA blocks the synthesis of poly-pyrrole throat prepolymer
In the three-necked bottle that 100mL is dried, it is sequentially added into the 3 of 10mmol, the Isosorbide-5-Nitrae of 3 '-diaminobenzidine DAB, 11mmol,
5,8-naphthalenetetracarbacidic acidic acid anhydride NTDA, 22 mmol benzoic acid, 3mL isoquinolin and 40mLm-cresol, logical nitrogen protection magnetic force
Stirring；After 2h, heat up 85 DEG C of reaction 6h, and 190 ° of C react 21h, and reaction is cooled to 70 DEG C and pours rapidly 150mL first into after terminating
In alcohol, obtain a large amount of solid precipitation；After this product of methanol cyclic washing, sucking filtration collected polymer, in vacuum drying oven,
160 DEG C of dry 20 h are stand-by；
(2) synthesis of amino-terminated sulfonated polyimide prepolymer
In the three-necked bottle that 100mL is dried, be sequentially added into 1.6 mmol 2,2 '-bis-(4-sulfonic benzo epoxide) benzidines,
12.5 mL m-creso1 and 0.8 mL triethylamine, logical nitrogen protection magnetic agitation；Treat 2,2 '-bis-(4-sulfonic benzo epoxides)
After benzidine is completely dissolved, sequentially add 1.5 mmol 3,4,9,10-tetracarboxylic anhydrides, 3.0mmol benzoic acid and
0.6mL isoquinolin；After 1h is stirred at room temperature, heat up 80 DEG C of reaction 4h, 180 DEG C of reaction 20h；After reaction terminates, it is down to room temperature, treats
Carry out next step reaction；
(3) block copolymerization reaction
The NTDA poly-pyrrole throat prepolymer of end-blocking that 0.095 mmol step (1) obtains it is directly added in the reaction solution of step (2)
With 4mL m-Creso1, after leading to nitrogen and 1h being stirred at room temperature, heat up 180 DEG C of reaction 20h；Reaction is cooled to 80 DEG C also after terminating
Pour into rapidly in 150mL methanol, obtain a large amount of thread product；After this product of methanol cyclic washing, sucking filtration collected polymer,
In vacuum drying oven, 130 DEG C of dry 10h obtain amino-terminated block copolymer；
(4) in the beaker of 200mL, above-mentioned amino-terminated block copolymer 3g, dimethyl sulfoxide 150mL are added, 80 DEG C of stirrings
After dissolving, add KH-560 5g, graphene oxide 10g and be warming up to 80 DEG C of stirring mixing 2 hours；Then pour the mixture into
In deionized water, and filter, filter cake is obtained polymer modification graphene oxide in 4 hours 120 DEG C of vacuum drying.
F2: polymer modification graphene oxide, is prepared from by following methods:
(1) NTDA blocks the synthesis of poly-pyrrole throat prepolymer
In the three-necked bottle that 100mL is dried, it is sequentially added into the 3 of 10mmol, the Isosorbide-5-Nitrae of 3 '-diaminobenzidine DAB, 11mmol,
5,8-naphthalenetetracarbacidic acidic acid anhydride NTDA, 22 mmol benzoic acid, 3mL isoquinolin and 40mLm-cresol, logical nitrogen protection magnetic force
Stirring；After 2h, heat up 85 DEG C of reaction 6h, and 190 ° of C react 21h, and reaction is cooled to 70 DEG C and pours rapidly 150mL first into after terminating
In alcohol, obtain a large amount of solid precipitation；After this product of methanol cyclic washing, sucking filtration collected polymer, in vacuum drying oven,
160 DEG C of dry 20 h are stand-by；
(2) synthesis of amino-terminated sulfonated polyimide prepolymer
In the three-necked bottle that 100mL is dried, it is sequentially added into 1.6 mmol 4,4 '-two (4-amino-benzene oxygen) biphenyl-3,3 ' two sulphurs
Acid aniline, 12.5 mL m-creso1 and 0.8 mL triethylamine, logical nitrogen protection magnetic agitation；Treat 2,2 '-bis-(4-sulfonic groups
Phenoxy group) after benzidine is completely dissolved, sequentially add 1.5 mmol Isosorbide-5-Nitraes, 5,8-naphthalenetetracarbacidic acidic acid anhydride NTDA, 3.0mmol
Benzoic acid and 0.6mL isoquinolin；After 1h is stirred at room temperature, heat up 80 DEG C of reaction 4h, 180 DEG C of reaction 20h；After reaction terminates, fall
To room temperature, next step reaction pending；
(3) block copolymerization reaction
The NTDA poly-pyrrole throat prepolymer of end-blocking that 0.095 mmol step (1) obtains it is directly added in the reaction solution of step (2)
With 4mL m-Creso1, after leading to nitrogen and 1h being stirred at room temperature, heat up 180 DEG C of reaction 20h；Reaction is cooled to 80 DEG C also after terminating
Pour into rapidly in 150mL methanol, obtain a large amount of thread product；After this product of methanol cyclic washing, sucking filtration collected polymer,
In vacuum drying oven, 130 DEG C of dry 10h obtain amino-terminated block copolymer；
(4) in the beaker of 200mL, above-mentioned amino-terminated block copolymer 3g, dimethyl sulfoxide 150mL are added, 80 DEG C of stirrings
After dissolving, add KH-560 5g, graphene oxide 10g and be warming up to 80 DEG C of stirring mixing 2 hours；Then pour the mixture into
In deionized water, and filter, filter cake is obtained polymer modification graphene oxide in 4 hours 120 DEG C of vacuum drying.
G1: sulfonate polybenzimidazole modification mesoporous silicon, its preparation method is:
By 0.1 mole 3,3 '-diaminobenzidine is first dissolved in 1000 grams of polyphosphoric acids containing 86wt% phosphorus pentoxide,
Then the 5-amino isophthalic acid of 0.05 mole and the 5-sulfonic group M-phthalic acid of 0.04 mole are joined reactant liquor
In, after 210 DEG C of reactions 15 hours, it is down to room temperature, in precipitating to water, then neutralizes with ammonia, filter, vacuum at 120 DEG C
It is dried, obtains amino-terminated sulfonate polybenzimidazole prepolymer；
In the metal reaction container with agitator, thermometer and condensing tube of 1000 mL add deionized water 100 mL,
After KH-560 1.5g, under agitation it is slowly added into mesoporous silicon MCM-41 20g, filters after reacting 30 minutes under room temperature
To silane-modified mesoporous silicon；
Described amino-terminated sulfonate polybenzimidazole prepolymer 1.8g, dimethyl sulfoxide 150mL is added in the beaker of 300mL,
After 75 DEG C of stirring and dissolving, add above-mentioned silane-modified mesoporous silicon 15g and be warming up to 80 DEG C of stirring mixing 3 hours；Then will be mixed
Compound is poured in deionized water, and filters, and filter cake is obtained polybenzimidazoles modification in 12 hours 110 DEG C of vacuum drying mesoporous
Silicon.
G2: sulfonate polybenzimidazole modification mesoporous silicon, its preparation method is:
By 0.1 mole 3,3 '-diaminobenzidine is first dissolved in 1000 grams of polyphosphoric acids containing 86wt% phosphorus pentoxide,
Then the 5-amino isophthalic acid of 0.09 mole is joined in reactant liquor, after 210 DEG C of reactions 15 hours, is down to room temperature,
Precipitating, in water, then neutralizes with ammonia, filters, be vacuum dried, obtain amino-terminated sulfonate polybenzimidazole pre-at 120 DEG C
Polymers；
In the metal reaction container with agitator, thermometer and condensing tube of 1000 mL add deionized water 100 mL,
After KH-560 1.5g, under agitation it is slowly added into mesoporous silicon MCM-41 20g, filters after reacting 30 minutes under room temperature
To silane-modified mesoporous silicon；
Described amino-terminated sulfonate polybenzimidazole prepolymer 1.8g, dimethyl sulfoxide 150mL is added in the beaker of 300mL,
After 75 DEG C of stirring and dissolving, add above-mentioned silane-modified mesoporous silicon 15g and be warming up to 80 DEG C of stirring mixing 3 hours；Then will be mixed
Compound is poured in deionized water, and filters, and filter cake is obtained polybenzimidazoles modification in 12 hours 110 DEG C of vacuum drying mesoporous
Silicon.
H1:KH-560
I1: drift-sand
Embodiment 1
By weight, by 30 parts of A1,7 parts of B1,10 parts of C1,13 parts of D1,9 parts of E1,6 parts of F1,8 parts of G1,7 parts of H1 and 0.06 part
I1, is sufficiently mixed 10 minutes in adding mixer, and discharging obtains dry powder paint.By weight, powder and water are pressed the ratio of 1:0.5
After example stirs, it is coated on steel construction, completes construction.
Embodiment 2
By weight, by 30 parts of A1,7 parts of B1,10 parts of C1,13 parts of D1,9 parts of E1,6 parts of F2,8 parts of G1,7 parts of H1 and 0.06 part
I1, is sufficiently mixed 10 minutes in adding mixer, and discharging obtains dry powder paint.By weight, powder and water are pressed the ratio of 1:0.5
After example stirs, it is coated on steel construction, completes construction.
Embodiment 3
By weight, by 3 by 30 parts of A1,7 parts of B1,10 parts of C1,13 parts of D1,9 parts of E1,6 parts of F1,8 parts of G2,7 parts of H1 and
0.06 part of I1, is sufficiently mixed 10 minutes in adding mixer, and discharging obtains dry powder paint.By weight, by powder and water by 1:
After the ratio of 0.5 stirs, it is coated on steel construction, completes construction.
Comparative example 1
By weight, by 30 parts of A1,7 parts of B1,10 parts of C1,13 parts of D1,9 parts of E1,8 parts of G1,7 parts of H1 and 0.06 part of I1, add
Being sufficiently mixed in entering mixer 10 minutes, discharging obtains dry powder paint.By weight, powder is stirred in the ratio of 1:0.5 with water
After mixing uniformly, it is coated on steel construction, completes construction.
Comparative example 2
By weight, by 30 parts of A1,7 parts of B1,10 parts of C1,13 parts of D1,9 parts of E1,6 parts of F1,7 parts of H1 and 0.06 part of I1, add
Being sufficiently mixed in entering mixer 10 minutes, discharging obtains dry powder paint.By weight, powder is stirred in the ratio of 1:0.5 with water
After mixing uniformly, it is coated on steel construction, completes construction.
Comparative example 3
By weight, by 30 parts of A1,7 parts of B1,10 parts of C1,13 parts of D1,9 parts of E1,7 parts of H1 and 0.06 part of I1, mixing is added
Being sufficiently mixed in machine 10 minutes, discharging obtains dry powder paint.By weight, powder is stirred in the ratio of 1:0.5 with water
After, it is coated on steel construction, completes construction.
Method of testing
Antifriction performance: by standard GB/T1768 79 (89, method of testing is to use ethanol wear-resistant tester, adds the counterweight of 500g weight,
Infiltrating the ethanol of 99.7% concentration with white cotton, rub back and forth, recording ink starts number of times when destroying.
Other performance, according to GB/14907-2002 standard testing, particularly as follows:
1, surface drying time answers≤8h
2, crack resistance: occur without crackle
3, adhesion strength >=0.2Mpa
4, resistance to water: after 24h, coating does not ftractures, aliquation, obscission
5, cold-hot cyclicity/number of times: after 15 times, coating does not ftractures, aliquation, obscission
6, fire endurance: coating layer thickness is 2mm, and fire endurance is not less than 1h
Test result is shown in Table 1.
Table 1
Data above it can be seen that with do not use polymer modification graphene oxide and sulfonate polybenzimidazole modification mesoporous silicon
Coating compare, the coating of the present invention has obvious better performance, is thus provided that the Advantageous Effects of the present invention.
Aforesaid example is merely illustrative, for explaining some features of the feature of the disclosure.Appended claim
It is intended to the widest scope that requirement it is contemplated that, and embodiments as presented herein is only according to all possible embodiment
The explanation of embodiment of selection of combination.Therefore, the purpose of applicant is that appended claim is not by the explanation present invention
The selectional restriction of example of feature.And the progress in science and technology will be formed due to language performance inaccurate reason and not
The possible equivalent or the son that are presently considered are replaced, and these changes also should be interpreted in the conceived case by appended
Claim covers.
Claims (2)
1. a ultrathin dry powder fire-resistant coating for steel structure, it is characterised in that count by weight proportion, including following component:
White cement 30 parts
Kieselguhr 5-10 part
Calcined kaolin 5-10 part
Hydrophilic silicon oxides 3-18 part
Polyoxyethylene polyoxy propanol amidogen ether 2-10 part
Polymer modification graphene oxide 2-10 part
Sulfonate polybenzimidazole modification mesoporous silicon 2-10 part
KH-560 3-10 part
Drift-sand 0-0.8 part；
Described polymer modification graphene oxide is prepared from by following methods:
(1) NTDA blocks the synthesis of poly-pyrrole throat prepolymer
In the three-necked bottle that 100mL is dried, it is sequentially added into the 3 of 10mmol, the Isosorbide-5-Nitrae of 3 '-diaminobenzidine DAB, 11mmol,
5,8-naphthalenetetracarbacidic acidic acid anhydride NTDA, 22 mmol benzoic acid, 3mL isoquinolin and 40mLm-cresol, logical nitrogen protection magnetic force
Stirring；After 2h, heat up 85 DEG C of reaction 6h, and 190 ° of C react 21h, and reaction is cooled to 70 DEG C and pours rapidly 150mL first into after terminating
In alcohol, obtain a large amount of solid precipitation；After this product of methanol cyclic washing, sucking filtration collected polymer, in vacuum drying oven,
160 DEG C of dry 20 h are stand-by；
(2) synthesis of amino-terminated sulfonated polyimide prepolymer
In the three-necked bottle that 100mL is dried, be sequentially added into 1.6 mmol 2,2 '-bis-(4-sulfonic benzo epoxide) benzidines,
12.5 mL m-creso1 and 0.8 mL triethylamine, logical nitrogen protection magnetic agitation；Treat 2,2 '-bis-(4-sulfonic benzo epoxides)
After benzidine is completely dissolved, sequentially add 1.5 mmol 3,4,9,10-tetracarboxylic anhydrides, 3.0mmol benzoic acid and
0.6mL isoquinolin；After 1h is stirred at room temperature, heat up 80 DEG C of reaction 4h, 180 DEG C of reaction 20h；After reaction terminates, it is down to room temperature, treats
Carry out next step reaction；
(3) block copolymerization reaction
The NTDA poly-pyrrole throat prepolymer of end-blocking that 0.095 mmol step (1) obtains it is directly added in the reaction solution of step (2)
With 4mL m-Creso1, after leading to nitrogen and 1h being stirred at room temperature, heat up 180 DEG C of reaction 20h；Reaction is cooled to 80 DEG C also after terminating
Pour into rapidly in 150mL methanol, obtain a large amount of thread product；After this product of methanol cyclic washing, sucking filtration collected polymer,
In vacuum drying oven, 130 DEG C of dry 10h obtain amino-terminated block copolymer；
(4) in the beaker of 200mL, above-mentioned amino-terminated block copolymer 3g, dimethyl sulfoxide 150mL are added, 80 DEG C of stirrings
After dissolving, add KH-560 5g, graphene oxide 10g and be warming up to 80 DEG C of stirring mixing 2 hours；Then pour the mixture into
In deionized water, and filter, filter cake is obtained polymer modification graphene oxide in 4 hours 120 DEG C of vacuum drying；
The preparation method of described sulfonate polybenzimidazole modification mesoporous silicon is:
By 0.1 mole 3,3 '-diaminobenzidine is first dissolved in 1000 grams of polyphosphoric acids containing 86wt% phosphorus pentoxide,
Then the 5-amino isophthalic acid of 0.05 mole and the 5-sulfonic group M-phthalic acid of 0.04 mole are joined reactant liquor
In, after 210 DEG C of reactions 15 hours, it is down to room temperature, in precipitating to water, then neutralizes with ammonia, filter, vacuum at 120 DEG C
It is dried, obtains amino-terminated sulfonate polybenzimidazole prepolymer；
In the metal reaction container with agitator, thermometer and condensing tube of 1000 mL add deionized water 100 mL,
After KH-560 1.5g, under agitation it is slowly added into mesoporous silicon MCM-41 20g, filters after reacting 30 minutes under room temperature
To silane-modified mesoporous silicon；
Described amino-terminated sulfonate polybenzimidazole prepolymer 1.8g, dimethyl sulfoxide 150mL is added in the beaker of 300mL,
After 75 DEG C of stirring and dissolving, add above-mentioned silane-modified mesoporous silicon 15g and be warming up to 80 DEG C of stirring mixing 3 hours；Then will be mixed
Compound is poured in deionized water, and filters, and filter cake is obtained polybenzimidazoles modification in 12 hours 110 DEG C of vacuum drying mesoporous
Silicon.
2. a preparation method for ultrathin dry powder fire-resistant coating for steel structure, including: the material component described in claim 1 is added
After being sufficiently mixed 10 minutes in entering mixer, discharging obtains.
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| CN106904907A (en) * | 2017-02-28 | 2017-06-30 | 惠州市博罗至诚化工有限公司 | A kind of environment-friendly solvent-free mineral coating for wall plastering and preparation method thereof |
| CN107955509A (en) * | 2017-11-29 | 2018-04-24 | 北京佑琳生科技有限公司 | A kind of cement-based penetrant water-repellent paint |
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| CN108162441A (en) * | 2018-01-08 | 2018-06-15 | 贵州高塑环保新材料有限公司 | High-elastic high-strength environmental protection PE composite film materials |
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