CN112898873A - Epoxy intumescent steel structure fireproof coating and preparation method thereof - Google Patents
Epoxy intumescent steel structure fireproof coating and preparation method thereof Download PDFInfo
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- CN112898873A CN112898873A CN202110152531.2A CN202110152531A CN112898873A CN 112898873 A CN112898873 A CN 112898873A CN 202110152531 A CN202110152531 A CN 202110152531A CN 112898873 A CN112898873 A CN 112898873A
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- 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
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- 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
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- 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
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- 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
- C09D5/38—Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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Abstract
The invention discloses an epoxy intumescent steel structure fireproof coating and a preparation method thereof, and discloses an intumescent steel structure fireproof coating which contains flaky fillers, has obviously improved corrosion resistance and is based on epoxy resin, wherein D99 of the flaky fillers is less than 2mm, if the flaky fillers are metal flaky fillers, D50 is at least less than 50 microns, preferably less than 20 microns, and if the flaky fillers are non-metal flaky fillers, D50 is less than 1 mm. The invention also discloses a preparation method of the epoxy intumescent steel structure fireproof coating. The epoxy intumescent fire-retardant coating containing the flaky filler is sprayed or smeared on a steel substrate, and after curing, a corrosion-resistant fire-retardant coating is formed on the surface. Compared with the coating without flaky filler, the fireproof coating prepared by the invention has obviously improved resistance to corrosive media.
Description
Technical Field
The invention belongs to the field of fireproof coatings, and relates to an epoxy resin-based fireproof coating, in particular to an epoxy intumescent steel structure fireproof coating and a preparation method thereof.
Background
Intumescent steel structural fire protection coatings are commonly used to increase the fire endurance of steel structural constructions. The material can expand in a fire scene and form a charcoal layer with heat insulation performance so as to insulate a steel member from heat generated by a fire, reduce the temperature rise rate of the steel member in the fire and ensure that the steel member keeps dimensional stability in a certain time.
The intumescent fire-retardant coating for the steel structure comprises a coating taking acrylic acid as a film forming substance and a fire-retardant coating taking epoxy resin as a binder. Among them, the latter intumescent fire-retardant coating using epoxy resin as binder is particularly suitable for ships, oil platforms and other hydrocarbon storage and treatment facilities. In general, these coatings have better medium resistance to salt, acid and the like than acrylic-based fire-retardant coatings due to the two-component hinge reaction and the large thickness of the finish. At present, people pay more attention to long-acting fireproof performance, however, with the increasingly severe use environment of the coating, the corrosion resistance of the existing fireproof coating taking epoxy resin as a binder to corrosive media such as salt water, hydrochloric acid and the like is insufficient. In addition, the fire-resistant retention performance of the fire-retardant coating after being corroded by corrosive media is more and more concerned, however, the fire-retardant performance of the existing fire-retardant coating using epoxy resin as a binder is affected after being corroded, so that the fire-retardant performance is reduced.
Disclosure of Invention
The invention provides an epoxy intumescent steel structure fireproof coating and a preparation method thereof, aiming at solving the technical problem that the fire resistance of the existing epoxy fireproof coating is reduced after the epoxy fireproof coating is eroded by corrosive media.
The technical scheme of the invention is as follows:
the epoxy intumescent steel structure fireproof coating comprises an epoxy fireproof coating and a flaky filler, wherein D99 of the flaky filler is smaller than 2mm, and the flaky filler accounts for 1-5% of the mixed weight of the component A and the component B, and preferably accounts for 3% of the weight of the component A.
Preferably, the formula does not contain a compound of a chlorine element.
Preferably, the free chlorine in the epoxy resin is 1000ppm or less.
Preferably comprising the following components: at least one epoxy resin, at least one epoxy curing agent, a catalyst ammonium polyphosphate and at least one flaky filler.
Further preferred are the following components: the composite material comprises at least one epoxy resin, at least one epoxy curing agent, a catalyst ammonium polyphosphate, a phosphate flame retardant and at least one flaky filler.
Preferably, the platy fillers comprise metallic platy fillers and/or non-metallic platy fillers, namely, the epoxy fireproof coating is dispersed with the platy metallic fillers, the platy non-metallic fillers or a combination of the two types of platy fillers.
Preferably, the metal flake filler comprises any one or a mixture of zinc powder, aluminum powder and copper powder, and the D50 of the metal flake filler is less than 50 microns.
The preferable non-metal flaky filler comprises any one or a mixture of several of glass flake, graphene, mica powder, unfired vermiculite, talc and kaolin, and the D50 of the non-metal flaky filler is less than 1 mm.
A process for preparing the fire-proof paint containing the flaky filler for steel structure includes such steps as providing a thick fire-proof paint containing the flaky filler and epoxy resin, and dispersing the flaky metallic filler, flaky non-metallic filler or the mixture of two kinds of flaky fillers.
Preferably, the method of the present invention further comprises the step of dispersing the platy filler in the thick mastic-like fire retardant coating. The dispersion mixing apparatus may be any one of a kneader, a scraped wall twin-shaft mixer, and a butterfly twin-shaft mixer.
Preferably, the epoxy fireproof coating comprises a component A and a component B, wherein the flaky filler is mixed with the component A firstly and then is mixed with the component B when in use; or the flaky filler is mixed with the component B firstly and then mixed with the component A when in use. The cement-like fire retardant coating is then applied to a steel substrate to form a corrosion-resistant fire retardant coating on the surface.
The invention has the beneficial technical effects
The invention relates to an epoxy intumescent steel structure fireproof coating, which contains flaky fillers, wherein D99 of the flaky fillers is less than 2 mm. The epoxy intumescent fire retardant coating containing the tablet-shaped filler is obtained by dispersing the epoxy intumescent fire retardant coating in any equipment of a planetary mixer, a kneader, a wall scraping double-shaft mixer or a butterfly double-shaft mixer at a low speed, and is thick and similar to the appearance of epoxy daub. Compared with the fireproof coating without the flaky filler, the epoxy intumescent steel structure fireproof coating containing the flaky filler has the advantages that the void ratio of the coating is greatly reduced, and the resistivity of the coating is improved, so that the coating has higher resistance to corrosive media such as saline water, hydrochloric acid and the like under severe conditions, the ideal fireproof performance is still maintained after corrosion, and the corrosion resistance of the known epoxy fireproof coating is improved without reducing the fireproof performance of the coating.
Preferably, the coating formulation is free of elemental chlorine compounds, particularly with respect to phosphate flame retardants, where it is desirable that the phosphate flame retardant structure be free of chlorine; free chlorine in the epoxy resin is less than or equal to 1000ppm so as to improve the anticorrosion performance of the epoxy coating containing the flaky filler.
Drawings
FIG. 1 is a fire-resistant time curve of the epoxy intumescent steel structure fire-retardant coating containing the platy filler in example 1 and the epoxy intumescent steel structure fire-retardant coating in comparative example 1 and a blank sample.
Detailed Description
Example 1
The epoxy intumescent fire retardant coating adopted in the embodiment is Fireal1709 produced by special fireproof and heat-insulating material company Limited, made by Beijing mu Cheng fire-proof and heat-insulating material company Limited, and comprises a component A and a component B.
The preparation method of the epoxy intumescent steel structure fireproof coating containing the flaky filler in the embodiment comprises the following steps:
a) forming the epoxy intumescent fire-retardant coating containing the flaky filler:
adding 3% of mica powder with the particle size of 1mm into a component A of Fireal1709, specifically adding 50kg of the component A into a planetary mixer, then adding 3kg of the mica powder with the particle size of 1mm, then adding 50kg of the component A, starting stirring after the addition is finished, mixing and stirring at low speed of 35-45 rpm for 30min, and discharging to obtain the component A of the epoxy intumescent steel structure fireproof coating containing the flaky filler;
component B of Fireal1709 for use;
b) during construction, the weight ratio of the component A to the component B of the flaky filler is 10.3: 4, then smearing the mixture on the surface of the steel plate by using a plastering knife, and forming a corrosion-resistant fireproof coating on the surface after curing.
In addition to the product Fireal1709 from this company, the epoxy fire-retardant coating from other manufacturers can also be added with flaky fillers. The epoxy fire-retardant coating can be a two-component system or a one-component system. In the case of a two-component system, the lamellar filler may be mixed with component A or with component B first, when in use.
Comparative example 1
Comparative example 1 is an epoxy intumescent steel structure fire retardant coating without flaky filler, in particular Fireal1709 produced by Beijing Mucheng fire-proof heat-insulating special material Co.
Blank example
The blank sample is an epoxy intumescent steel structure fireproof coating without flaky filler, in particular to Fireal1709 produced by Beijing mu Cheng fire-proof heat-insulating special material company Limited, and fire resistance test is carried out without brine.
Method for evaluating corrosion resistance
The cured fire-retardant coatings of example 1 and comparative example 1 were edge-sealed, immersed in a 3% sodium chloride solution, and placed in an oven at 40 ℃ for 30 days. The refractory time of the coating was tested after removal and compared to the blank and the results are shown in table 1 and figure 1. In FIG. 1, the blank is Fireal1709 refractory time before soaking in saline; fireal1709-1 is the fire resistance time of the epoxy intumescent fire retardant coating containing the platy filler in example 1 after being soaked in saline water; fireal1709 is the fire resistance time after the epoxy intumescent fire retardant coating of comparative example 1 without platy filler has been foamed with brine.
TABLE 1 comparison of the performance of the epoxy intumescent fire-retardant coating with flaky filler for steel structure with the fire-retardant coating without flaky filler
The decay rate of the fire resistance: the difference between the fire-resistant time after the Fireal1709-1 of example 1 and the Fireal1709 of comparative example 1 were soaked in brine and the fire-resistant time of Fireal1709 of blank-not-soaked brine, and the ratio of the fire-resistant time to the Fireal1709 of blank-not-soaked brine were defined as the decay rate of fire-resistant performance.
The fireproof coating with good corrosion resistance has low attenuation rate. As can be seen from Table 1 and FIG. 1, the fire retardant coating Fireal1709-1 prepared by the present invention has a lower decay rate and a significantly improved resistance to corrosive media, compared to the sample Fireal1709 of comparative example 1, which does not contain a coating of a platy filler.
The foregoing shows and describes the general principles, essential features and advantages of the invention, which is, therefore, described only as an example of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but rather that the invention includes various equivalent changes and modifications without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The epoxy intumescent fire-retardant coating for the steel structure is characterized by comprising an epoxy fire-retardant coating and a flaky filler, wherein D99 of the flaky filler is less than 2mm, and the flaky filler accounts for 1-5% of the weight of the epoxy fire-retardant coating.
2. The epoxy intumescent fire retardant coating for steel structures as claimed in claim 1, characterized in that the formulation does not contain compounds containing halogen elements.
3. The epoxy intumescent fire retardant coating for steel structures as claimed in claim 1, characterized by comprising the following components: at least one epoxy resin, at least one epoxy curing agent, a catalyst ammonium polyphosphate and at least one flaky filler.
4. The epoxy intumescent fire retardant coating for steel structures as claimed in claim 3, characterized in that the free chlorine in said epoxy resin is not more than 1000 ppm.
5. The epoxy intumescent fire retardant coating for steel structures as claimed in claim 4, characterized by comprising the following components: the composite material comprises at least one epoxy resin, at least one epoxy curing agent, a catalyst ammonium polyphosphate, a phosphate flame retardant and at least one flaky filler.
6. The epoxy intumescent fire retardant coating for steel structure as claimed in claim 1, characterized in that said platy filler comprises metallic platy filler and/or non-metallic platy filler.
7. The epoxy intumescent fire retardant coating for steel structures as claimed in claim 6, characterized in that said metal flake filler comprises any one or mixture of zinc powder, aluminum powder and copper powder, and D50 of said metal flake filler is less than 50 μm.
8. The epoxy intumescent fire retardant coating for steel structures as claimed in claim 6, characterized in that said non-metallic platy filler comprises any one or mixture of several of glass flakes, graphene, mica powder, unfired vermiculite, talc, kaolin, and said non-metallic platy filler has D50 less than 1 mm.
9. The method for preparing the epoxy intumescent fire retardant coating for the steel structure as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
and dispersing the flaky filler in the epoxy fireproof coating at a low speed in a planetary mixer, a kneader, a wall scraping double-shaft mixer or a butterfly double-shaft mixer to obtain the epoxy intumescent fireproof coating containing the flaky filler.
10. The method according to claim 9, characterized by the steps of:
the component A of the epoxy intumescent fire retardant coating is divided into two parts, one part of the component A is added into a stirrer, then the flaky filler is added, the other part of the component A is added, stirring is started after the addition is finished, low-speed mixing and stirring are carried out, and finally discharging is carried out, so that the component A of the epoxy intumescent fire retardant coating containing the flaky filler is obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110152531.2A CN112898873A (en) | 2021-02-04 | 2021-02-04 | Epoxy intumescent steel structure fireproof coating and preparation method thereof |
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| CN202110152531.2A CN112898873A (en) | 2021-02-04 | 2021-02-04 | Epoxy intumescent steel structure fireproof coating and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061119A (en) * | 2009-11-16 | 2011-05-18 | 中国京冶工程技术有限公司 | Solvent-free epoxy resin fire-resistant coating for ultrathin steel structure |
| CN102533043A (en) * | 2010-12-10 | 2012-07-04 | 深圳市嘉达高科产业发展有限公司 | Anticorrosive inflaming retarding epoxy glass scale paint |
| CN109971229A (en) * | 2019-02-20 | 2019-07-05 | 安徽吉川科技有限公司 | A kind of anti-stone of intumescent hits material and preparation method thereof |
| CN110194921A (en) * | 2019-06-20 | 2019-09-03 | 无锡市烯能达新材料科技有限公司 | Expanded epoxy fireproof coating and preparation method thereof |
| CN111961384A (en) * | 2020-08-10 | 2020-11-20 | 大连理工大学 | Solvent type ultrathin expansion type steel structure fireproof coating and preparation method thereof |
-
2021
- 2021-02-04 CN CN202110152531.2A patent/CN112898873A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061119A (en) * | 2009-11-16 | 2011-05-18 | 中国京冶工程技术有限公司 | Solvent-free epoxy resin fire-resistant coating for ultrathin steel structure |
| CN102533043A (en) * | 2010-12-10 | 2012-07-04 | 深圳市嘉达高科产业发展有限公司 | Anticorrosive inflaming retarding epoxy glass scale paint |
| CN109971229A (en) * | 2019-02-20 | 2019-07-05 | 安徽吉川科技有限公司 | A kind of anti-stone of intumescent hits material and preparation method thereof |
| CN110194921A (en) * | 2019-06-20 | 2019-09-03 | 无锡市烯能达新材料科技有限公司 | Expanded epoxy fireproof coating and preparation method thereof |
| CN111961384A (en) * | 2020-08-10 | 2020-11-20 | 大连理工大学 | Solvent type ultrathin expansion type steel structure fireproof coating and preparation method thereof |
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