CN107868575B - Low-temperature-resistant fireproof coating and preparation method thereof - Google Patents
Low-temperature-resistant fireproof coating and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 113
- 239000011248 coating agent Substances 0.000 title claims abstract description 111
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 64
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 claims abstract description 62
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 54
- 238000003756 stirring Methods 0.000 claims abstract description 36
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 32
- 239000003822 epoxy resin Substances 0.000 claims abstract description 30
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 30
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 27
- 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 abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000007873 sieving Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- 239000011259 mixed solution Substances 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims description 13
- 239000003063 flame retardant Substances 0.000 claims description 11
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000002994 raw material Substances 0.000 abstract description 20
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- 238000009835 boiling Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000007710 freezing Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000004359 castor oil Substances 0.000 description 5
- 235000019438 castor oil Nutrition 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 5
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 5
- 239000000347 magnesium hydroxide Substances 0.000 description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 5
- 238000004781 supercooling Methods 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- DMJZWFZICOEEAJ-UHFFFAOYSA-N 2-(4-bromothiophen-3-yl)sulfanylpropanoic acid Chemical compound OC(=O)C(C)SC1=CSC=C1Br DMJZWFZICOEEAJ-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012757 flame retardant agent Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011112 process operation 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
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
- C08K2003/166—Magnesium halide, e.g. magnesium chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a low-temperature-resistant fireproof coating and a preparation method thereof, wherein the coating comprises the following raw materials in parts by weight: magnesium chloride solution: 10-15 parts of dicyandiamide: 15-20 parts of epoxy resin: 10-15 parts of sodium nitrite: 10-15 parts of lithopone: 2-5 parts of talcum powder: 5-10 parts of diacetone alcohol: 20-30 parts of an anti-settling agent: 2-5 parts. The preparation method comprises the following steps: heating the prepared magnesium chloride solution to boil, cooling to room temperature, adding dicyandiamide, and standing; fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the anti-settling agent in proportion, sieving, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the solution, and dispersing and uniformly stirring. The low-temperature-resistant fireproof coating prepared by the invention has good fireproof performance, excellent low-temperature resistance and strong bonding performance, and is not easily influenced by the environment.
Description
Technical Field
The invention belongs to the technical field of paint preparation, and particularly relates to a low-temperature-resistant fireproof paint and a preparation method thereof.
Background
At present, petrochemical production, pipelines and storage equipment have high fire risk and high fire prevention requirements, substances are stored at low temperature frequently, once leakage accidents happen to the equipment, low-temperature media can be filled in the surface of the equipment instantly, the coated fire-proof coating can effectively protect the surface of the coated equipment, the fire resistance limit of the coated equipment is improved, the effectiveness of initial disaster control during accident rescue can be directly influenced, the occurrence of catastrophic accidents is avoided, and personal and property safety is protected to the maximum extent. However, the existing fireproof coating has the problems that when the existing fireproof coating meets a low-temperature oil medium, the adhesive force of the existing fireproof coating is easily influenced, and if the problems of overall falling and damage of the fireproof coating outside equipment and the like occur due to insufficient adhesive force, the fireproof performance of the coating is directly influenced.
CN201310245272.3 discloses an intumescent fire-retardant coating, which utilizes the combination of resin, catalyst, char-forming agent, flame retardant and foaming agent to improve the low-temperature curability of the coating; CN201410216328.7 discloses a novel tunnel fireproof coating, which combines water glass and silicate materials to meet the fireproof requirement and the low temperature resistance requirement; CN201611244576.8 discloses an elastic fireproof coating and a preparation method thereof, wherein the elastic fireproof coating is prepared by combining epoxy resin and a curing agent; although the curing performance of the resin fireproof coating is improved at low temperature, the application range is not particularly specified in the petrochemical field, so that the requirements of the resin fireproof coating on low-temperature storage media in certain petrochemical fields cannot be verified, and the binding force and the adsorption force of the resin fireproof coating after meeting low-temperature petrochemical media are also testable.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to apply the coating with low-temperature-resistant and fireproof performance to the petrochemical field, the low-temperature-resistant and antifreezing fireproof coating is provided, so that the coating not only has good low-temperature-resistant characteristic when being instantly contacted with a low-temperature petroleum medium, but also has no influence on fireproof flame retardance and caking property, and can be contacted and frequently used in places for storing low-temperature media in the petrochemical industry without deterioration.
The technical scheme adopted by the invention for solving the technical problems is as follows: the low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 10-15 parts of dicyandiamide: 15-20 parts of epoxy resin (the epoxy resin is low-temperature-resistant epoxy resin): 10-15 parts of sodium nitrite: 10-15 parts of lithopone: 2-5 parts of talcum powder: 5-10 parts of diacetone alcohol: 20-30 parts of an anti-settling agent: 2-5 parts.
Further, the anti-settling agent is: polyethylene wax or ultra fine silica.
Further, the mass concentration of the magnesium chloride solution is as follows: 25 to 30 percent.
The invention also provides a preparation method of the low-temperature-resistant fireproof coating, which comprises the following preparation steps:
(1) heating the prepared magnesium chloride solution to boil, cooling to room temperature, adding dicyandiamide, and standing for 3-5 hours to obtain a mixed solution;
(2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the anti-settling agent according to a proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol solvent, uniformly stirring, slowly adding the mixture into the mixed solution obtained in the step (1), stirring for 50-60 min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
In the process of preparing the low-temperature-resistant fireproof coating, the concentration of H ions is increased and the H ions are combined with CL ions to generate HCL in the heating and boiling process of the magnesium chloride solution, and the HCL is volatilized to leave Mg2+And OH-The flame retardant magnesium hydroxide is generated through hydrolysis and combination, a certain amount of dicyandiamide with the double functions of a foaming agent and a curing agent is added, when the coating meets fire, dicyandiamide is decomposed in the fire to generate ammonia gas, the ammonia gas generated by decomposition can dilute the concentration of combustible gas, the coating is expanded, and a honeycomb-shaped heat insulation layer formed through high-temperature carbonization after the coating is expanded is combined with magnesium hydroxide generated through hydrolysis of magnesium chloride, so that the coating has a good fireproof and flame-retardant effect. In addition, when the coating meets fire, the added dicyandiamide component plays a role of a curing agent of the coating while the coating has a fireproof and flame-retardant effect, so that the binding power of the coating is stronger, and the coating is not easily influenced by the environment; the added water reducing agent sodium nitrite is matched with the low-temperature-resistant epoxy resin for use, so that effective dehydration can be realized, and the anti-freezing effect of the coating in a low-temperature operation environment can be remarkably improved, thereby further improving the low-temperature-resistant characteristic of the coating. In addition, the product is added with lithopone with better covering power, alkali resistance and fluidity, so that the coating has stronger cohesive force, is less susceptible to environment and is beneficial to prolonging the service life of the coating.
The invention also provides the application of the low-temperature-resistant fireproof coating, and the coating is used in places for storing low-temperature media in the petrochemical industry.
The invention has the beneficial effects that: the invention has reasonable formula design and simple and convenient process operation, forms the magnesium hydroxide with flame retardant effect by heating the magnesium chloride solution, and can obviously improve the fireproof and flame retardant effect of the coating when meeting fire under the synergistic action of the dicyandiamide with the double functions of the foaming agent and the curing agent, and simultaneously improve the binding power of the coating to ensure that the coating is not influenced by the environment; sodium nitrite is added to be matched with low-temperature-resistant epoxy resin for use, so that the anti-freezing effect of the coating in a low-temperature operation environment can be effectively improved, and the low-temperature-resistant characteristic of the coating is further improved; the addition of lithopone makes the paint have stronger binding power and is favorable for prolonging the service life of the paint in the petrochemical field.
The low-temperature-resistant anti-freezing fireproof coating prepared by the invention has good fireproof and heat-insulating properties, has the advantages of excellent low-temperature resistance, excellent flame retardance and the like, is low in material price and easy to obtain, and is convenient in coating preparation process; uniformly coating castor oil with the thickness of 1mm on a steel plate coated with the low-temperature-resistant anti-freezing fireproof coating for 24 hours, placing the steel plate in a control room with the temperature of minus 50 +/-2 ℃ and the humidity of 50-55% for 48 hours, taking out the small steel plate, and observing that the coating surface has no peeling, bulging and falling phenomena caused by supercooling and humidity; in addition, after the oxy-acetylene flame combustion test, the flame is not burnt for 10 minutes; the fireproof performance of the coating after low-temperature test can still meet the fireproof requirement, so that the coating has better low-temperature-resistant fireproof performance.
Detailed Description
The specific embodiments will now be further described.
Example 1:
the low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 10 parts of dicyandiamide: 15 parts of epoxy resin: 15 parts of sodium nitrite: 15 parts of lithopone: 5 parts of talcum powder: 5 parts of diacetone alcohol: 30 parts of anti-settling agent polyethylene wax: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 25%, cooling to room temperature, adding dicyandiamide, and standing for 3 hours to obtain a mixed solution;
(2) and (2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the polyethylene wax according to a proportion, sieving by a 200-mesh sieve, adding diacetone alcohol, uniformly stirring, slowly adding the mixture into the mixed solution obtained in the step (1), stirring for 50min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Example 2
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of dicyandiamide: 20 parts of epoxy resin: 10 parts of sodium nitrite: 10 parts of lithopone: 5 parts of talcum powder: 10 parts of diacetone alcohol: 25 parts of anti-settling agent polyethylene wax: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 25%, cooling to room temperature, adding dicyandiamide, and standing for 3 hours to obtain a mixed solution;
(2) and (2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the polyethylene wax according to a proportion, sieving by a 200-mesh sieve, adding diacetone alcohol, uniformly stirring, slowly adding the mixture into the mixed solution obtained in the step (1), stirring for 50min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Example 3
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of dicyandiamide: 15 parts of epoxy resin: 15 parts of sodium nitrite: 10 parts of lithopone: 2 parts of talcum powder: 8 parts of diacetone alcohol: 30 parts of anti-settling agent polyethylene wax: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 25%, cooling to room temperature, adding dicyandiamide, and standing for 3.5 hours to obtain a mixed solution;
(2) and (2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the polyethylene wax according to a proportion, sieving by a 200-mesh sieve, adding diacetone alcohol, uniformly stirring, slowly adding the mixture into the mixed solution obtained in the step (1), stirring for 50min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Example 4
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 10 parts of dicyandiamide: 15 parts of epoxy resin: 15 parts of sodium nitrite: 15 parts of lithopone: 5 parts of talcum powder: 5 parts of diacetone alcohol: 30 parts of anti-settling agent superfine silicon dioxide: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 30%, cooling to room temperature, adding dicyandiamide, and standing for 4 hours to obtain a mixed solution;
(2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the superfine silicon dioxide according to the proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the mixed solution obtained in the step (1), stirring for 60min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Example 5
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of dicyandiamide: 20 parts of epoxy resin: 10 parts of sodium nitrite: 10 parts of lithopone: 5 parts of talcum powder: 10 parts of diacetone alcohol: 25 parts of anti-settling agent superfine silicon dioxide: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 30%, cooling to room temperature, adding dicyandiamide, and standing for 3 hours to obtain a mixed solution;
(2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the superfine silicon dioxide according to the proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the mixed solution obtained in the step (1), stirring for 50min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Example 6
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of dicyandiamide: 15 parts of epoxy resin: 15 parts of sodium nitrite: 10 parts of lithopone: 2 parts of talcum powder: 8 parts of diacetone alcohol: 30 parts of anti-settling agent superfine silicon dioxide: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 30%, cooling to room temperature, adding dicyandiamide, and standing for 5 hours to obtain a mixed solution;
(2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the superfine silicon dioxide according to the proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the mixed solution obtained in the step (1), stirring for 60min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Uniformly coating castor oil with the thickness of 1mm on a steel plate coated with any one of the low-temperature-resistant, frost-resistant and fireproof coatings prepared in the embodiments 1 to 4 for 24 hours, placing the steel plate in a control room with the temperature of minus 50 +/-2 ℃ and the humidity of 50-55% for 48 hours, taking out the small steel plate, and observing that the coating surface has no peeling, bulging and falling phenomena caused by supercooling and humidity; then, after an oxy-acetylene flame combustion test, the mixture is not combusted for 10 minutes; the fire resistance of the coating after low temperature test can still meet the fire-proof requirement, so that the low temperature resistant fire-proof coating obtained by the invention has better low temperature resistant fire-proof performance.
Comparative example 1
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of epoxy resin: 15 parts of dicyandiamide: 20 parts of lithopone: 5 parts of talcum powder: 10 parts of diacetone alcohol: 30 parts of anti-settling agent superfine silicon dioxide: 5 parts of the raw materials.
The preparation method comprises the following steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 30%, cooling to room temperature, adding dicyandiamide, and standing for 5 hours to obtain a mixed solution;
(2) and (2) fully grinding and uniformly mixing the epoxy resin, the lithopone, the talcum powder and the superfine silicon dioxide according to a proportion, sieving by a 200-mesh sieve, adding diacetone alcohol, uniformly stirring, slowly adding the mixture into the solution obtained in the step (1), stirring for 60min at 2000 revolutions per minute, and uniformly dispersing to obtain the fireproof coating.
Uniformly coating 1mm of castor oil on a steel plate coated with the fireproof coating prepared in the comparative example for 24 hours, placing the steel plate in a control room with the temperature of minus 50 +/-2 ℃ and the humidity of 50-55% for 48 hours, taking out the small steel plate, and observing the phenomena of peeling, bulging and falling off caused by supercooling and humidity on the surface of the coating; then, after an oxy-acetylene flame combustion test, the mixture is not combusted for 10 minutes; therefore, the fireproof coating without the sodium nitrite has good fireproof and flame-retardant effects, but the effect is not obvious in the aspect of low-temperature resistance.
Comparative example 2
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of epoxy resin: 15 parts of butyraldehyde oxime: 15 parts of sodium nitrite: 10 parts of lithopone: 2 parts of talcum powder: 8 parts of diacetone alcohol: 30 parts of anti-settling agent superfine silicon dioxide: 5 parts of the raw materials.
A preparation method of a low-temperature-resistant fireproof coating comprises the following preparation steps:
(1) heating and boiling the prepared magnesium chloride solution with the mass concentration of 30%, cooling to room temperature, adding butyraldehyde oxime, and standing for 5 hours to obtain a mixed solution;
(2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the superfine silicon dioxide according to the proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the solution obtained in the step (1), stirring for 60min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Uniformly coating castor oil with the thickness of 1mm on a steel plate coated with the low-temperature-resistant, anti-freezing and fireproof coating prepared in the comparative example for 24 hours, placing the steel plate in a control room with the temperature of minus 50 +/-2 ℃ and the humidity of 50-55% for 48 hours, taking out the small steel plate, and observing that the coating surface does not have the phenomena of peeling, bulging and falling off due to supercooling and humidity; then, after an oxy-acetylene flame combustion test, the mixture is not combusted for 6 minutes; the fire resistance of the low-temperature-resistant fireproof flame-retardant coating obtained by replacing dicyandiamide with butyraldehyde oxime is obviously reduced after a low-temperature test.
Comparative example 3
The low-temperature-resistant fireproof coating comprises the following raw materials in parts by weight: magnesium chloride solution: 15 parts of epoxy resin: 15 parts of dicyandiamide: 15 parts of sodium nitrite: 10 parts of lithopone: 2 parts of talcum powder: 8 parts of diacetone alcohol: 30 parts of anti-settling agent superfine silicon dioxide: 5 parts of the raw materials.
The preparation method comprises the following steps:
(1) adding dicyandiamide into a prepared magnesium chloride solution with the mass concentration of 30%, and standing for 5 hours to obtain a mixed solution;
(2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the superfine silicon dioxide according to the proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the mixed solution obtained in the step (1), stirring for 60min at 2000 revolutions per minute, and dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
Uniformly coating castor oil with the thickness of 1mm on a steel plate coated with the low-temperature-resistant, anti-freezing and fireproof coating prepared in the comparative example for 24 hours, placing the steel plate in a control room with the temperature of minus 50 +/-2 ℃ and the humidity of 50-55% for 48 hours, taking out the small steel plate, and observing that the coating surface does not have the phenomena of peeling, bulging and falling off due to supercooling and humidity; then, after an oxy-acetylene flame combustion test, the oxygen is not combusted for 2 minutes; the preparation process of the coating does not adopt a process of boiling the magnesium chloride solution, and the fireproof performance of the coating is obviously influenced.
The performance index of the coatings described in the examples and comparative examples is shown in table 1.
TABLE 1 coating Performance index
After the sodium nitrite is added in each embodiment of the invention, the low temperature resistance is obviously better than that of the comparative example 1, because the sodium nitrite and the low temperature resistant epoxy resin are matched for use, the water can be effectively reduced, and the low temperature resistance of the coating can be effectively improved;
after dicyandiamide with the double effects of a foaming agent and a curing agent is added in each embodiment, the oil resistance of the coating is obviously superior to that of a comparative example 2, because dicyandiamide can enable the fireproof coating to be carbonized after expansion under the action of high temperature to form a honeycomb-shaped heat insulation layer, magnesium hydroxide obtained by heating magnesium chloride is matched to obviously improve the fireproof performance of the coating, and meanwhile, the curing performance of the dicyandiamide can obviously improve the binding power of the coating, so that the oil resistance of the coating is effectively improved;
after the boiling process is added in the manufacturing process steps of each embodiment, the oil resistance and the low temperature resistance of the steel are obviously superior to those of comparative example 3, because magnesium chloride can be converted into magnesium hydroxide in the boiling process, and meanwhile, dicyandiamide is added after the steel is cooled to room temperature, so that the decomposition of dicyandiamide due to high temperature is avoided, and the foaming and curing effects of dicyandiamide in the fire process are favorably realized.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (6)
1. A low-temperature-resistant fireproof coating is characterized in that: the low-temperature-resistant fireproof coating comprises the following components in percentage by mass: magnesium chloride solution: 10-15 parts of dicyandiamide: 15-20 parts of epoxy resin: 10-15 parts of sodium nitrite: 10-15 parts of lithopone: 2-5 parts of talcum powder: 5-10 parts of diacetone alcohol: 20-30 parts of an anti-settling agent: 2-5 parts.
2. The low temperature resistant fire retardant coating of claim 1, wherein: the anti-settling agent is: polyethylene wax and superfine silicon dioxide.
3. The low temperature resistant fire retardant coating of claim 1, wherein: the mass concentration of the magnesium chloride solution is 25-30%.
4. A method for preparing the low temperature resistant fireproof coating according to claim 1, wherein the method comprises the following steps: the preparation method comprises the following steps:
(1) heating the prepared magnesium chloride solution to boil, cooling to room temperature, adding dicyandiamide, and standing for 3-5 hours to obtain a mixed solution;
(2) and (2) fully grinding and uniformly mixing the epoxy resin, the sodium nitrite, the lithopone, the talcum powder and the anti-settling agent according to a proportion, sieving by a 200-mesh sieve, adding the diacetone alcohol, uniformly stirring, slowly adding the diacetone alcohol into the mixed solution obtained in the step (1), stirring, dispersing and uniformly stirring to obtain the low-temperature-resistant fireproof coating.
5. The preparation method of the low temperature resistant fireproof coating according to claim 4, wherein: the stirring speed in the step (2) is as follows: 2000 rpm; the stirring time is 50 min-60 min.
6. Use of a low temperature resistant fire retardant coating according to claim 1, characterized in that: the low-temperature-resistant fireproof coating is used in places for storing low-temperature media in the petrochemical industry.
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| CN102167944A (en) * | 2011-05-31 | 2011-08-31 | 苏州市金近涂料有限公司 | Water-based dipping lacquer and preparation method thereof |
| CN103289516A (en) * | 2013-05-31 | 2013-09-11 | 安徽国电能源设备工程有限公司 | High temperature-resistant powder coating |
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| CN102167944A (en) * | 2011-05-31 | 2011-08-31 | 苏州市金近涂料有限公司 | Water-based dipping lacquer and preparation method thereof |
| CN103289516A (en) * | 2013-05-31 | 2013-09-11 | 安徽国电能源设备工程有限公司 | High temperature-resistant powder coating |
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