CN1927962A - Ultra-thin expansion steel structure fire-proof paint capable of resisting hydrocarbons fire and preparation method thereof - Google Patents
Ultra-thin expansion steel structure fire-proof paint capable of resisting hydrocarbons fire and preparation method thereof Download PDFInfo
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- CN1927962A CN1927962A CN 200510029420 CN200510029420A CN1927962A CN 1927962 A CN1927962 A CN 1927962A CN 200510029420 CN200510029420 CN 200510029420 CN 200510029420 A CN200510029420 A CN 200510029420A CN 1927962 A CN1927962 A CN 1927962A
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Abstract
The present invention relates to one kind of fire-proof paint with high hydrocarbon fire resistance for steel structure and its preparation process. The fire-proof paint has filming material comprising fluoric polymer emulsion and organosilicon modified polyacrylate emulsion, composite fireproof assistant comprising melamine and pentaerythritol, expanding agent comprising melamine phosphate with excellent carbon forming performance and foaming performance and expandable graphite, heat resisting stuffing comprising zinc oxide, titanium dioxide, kaolin aluminum silicate fiber, and filming assistant propylene glycol. It can bear hydrocarbon fire with high temperature raising speed, and has fire resisting limit up to 90 min, simple preparation process, low cost and wide application.
Description
Technical field
The present invention relates to frie retardant coating, steel construction coating of especially anti-hydro carbons fire and preparation method thereof.
Background technology
Existing steel structure fire-proof paint kind is more, can be divided into aq. type, solvent-borne type and powder-type three classes by its material shape; Can be divided into thick type, slim and ultrathin three classes by coat-thickness; Its fire prevention mechanism then can be divided into heat insulation type, expanded polystyrene veneer and non-expansion type three classes.Steel structure fire-proof paint commonly used at present is mainly by thick type, slim and ultrathin three kinds of classification, and wherein ultra-thin fire-resistant coating has fire resistance and decorate properties preferably, is the direction of frie retardant coating development.
When the buildings presence of fire, fire scene temperature is generally between 800～1200 ℃.Rise to 800 ℃ from room temperature and be approximately 25 minutes.Existing steel structure fire-proof paint is all at this temperature rise rate design.
But, along with developing rapidly and the widespread usage of chemical building material in recent years of petrochemical complex, the fire that chemical building material that is made of macromolecular material and petrochemical enterprise relate to is all caused by organic chemical industry's starting material, this class fire is called the hydro carbons fire, hydrocarbon fire and general building fire have very big difference, have the advantages that propagation of flame and heat-up rate are exceedingly fast, fire scene temperature can rise to more than 1000 ℃ in several minutes usually.Also may be accompanied by in the combustion processes simultaneously because the enormous impact ripple that the oil product blast produces.Therefore the present frie retardant coating of developing generally can not adapt to the requirement of anti-hydro carbons fire, must study the frie retardant coating of preventing the hydro carbons fire according to the environment for use and the characteristics of hydrocarbon fire protective material.
The fire proofing additive of the existing ultra-thin expansion fireproof coating that is used for steel construction is mainly by ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane and mineral filler component, and filmogen mainly comprises aqueous polymer emulsion (as benzene emulsion, pure-acrylic emulsion, vinyl acetate emulsion, chlorine partial emulsion etc.), water-soluble polymeric resin (as aminoresin, water soluble phenol resin etc.) and solvent based polymer resin (as chlorinated rubber, polyacrylate resin, Resins, epoxy, HCPE etc.).Its preparation technology is for forming polymer emulsion or resin and fire proofing additive mixed grinding.
But when above-mentioned frie retardant coating was used for preventing hydrocarbon fire, therefore very fast being burnt can not use as the steel structure fire-proof paint of anti-hydro carbons fire because filmogen can not bear the temperature of quick rising.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of ultrathin expansion type steel structure coating with anti-hydro carbons fire ability and preparation method thereof, overcomes the above-mentioned shortcoming of prior art.
For solving the problems of the technologies described above, the present invention is performed such: coating of the present invention is formed the employing fluoropolymer emulsion and the silicone-modified polyacrylate emulsion is a filmogen, and ammonium polyphosphate, trimeric cyanamide and tetramethylolmethane compound system be fire proofing additive, particularly added to become the very high expanded graphite of the good melamine phosphate of carbon performance and foam performance and expansion ratio as swelling agent.Wherein: ammonium polyphosphate class fire proofing additive is ammonium polyphosphate, trimeric cyanamide and tetramethylolmethane; Filler is zinc oxide, titanium dioxide, kaolin and aluminum silicate fiber, and propylene glycol is a film coalescence aid.
It is as follows that coating of the present invention is formed proportioning:
Amounts of components (wt%)
Fluoropolymer emulsion (solids content 40%～45%) 30～40
Silicone-modified polyacrylate emulsion (solids content 45%～50%) 5～10
Ammonium polyphosphate 15～20
Melamine phosphate 5～10
Trimeric cyanamide 3～7
Tetramethylolmethane 10～15
Expanded graphite 4～10
Zinc oxide 0～6
Titanium dioxide 0～5
Kaolin 0～10
Aluminum silicate fiber 2～5
Propylene glycol 2～5
Wherein the polymkeric substance in the fluoropolymer emulsion is the multipolymer of trifluorochloroethylene, alkyl vinyl ether (wherein alkyl is ethyl or butyl), undecylenic acid, hydroxy butyl vinyl ether and vinylformic acid polyoxyethylene ester (the wherein polyoxyethylated polymerization degree is 7～40), fluorine content 21%～25%.
The preparation method of this water-based fluoropolymer emulsion comprises following steps:
(1) reaction monomers, compound emulsifying agent and deionized water are added in the reaction vessel in proportion, stir, obtain pre-emulsion;
(2) oxygenant, reductive agent and PH buffer reagent are dissolved in respectively in the deionized water, obtain oxidizing agent solution, reductant solution and pH buffer agent solution;
(3) pre-emulsion, reductant solution and PH buffer agent solution are placed reaction vessel, remove air in the reaction vessel, charge into corresponding gaseous monomer, and the adding oxidizing agent solution, stir control reaction temperature, reaction finishes, and unreacted gaseous monomer in the container is removed in decompression, obtains emulsion.
Polymkeric substance in this emulsion contains the random copolymers of following structural unit:
Wherein: R is CH
2CH
3, CH
2CH (CH
3) CH
3Or COCH
3N, m, p, q, x, y are the positive integer greater than 1.
Further, step (1) is that the deionized water with alkyl vinyl ether or vinyl acetate, hydroxy butyl vinyl ether, undecylenic acid, vinylformic acid polyoxyethylene ester, compound emulsifying agent and about 3/5 adds in the reaction vessel in proportion, high-speed stirring under the normal temperature obtains pre-emulsion;
Step (2) is that oxygenant, reductive agent and PH buffer reagent are dissolved in respectively in remaining 2/5 deionized water, obtains oxidizing agent solution, reductant solution and pH buffer agent solution;
Step (3) is with pre-emulsion, reductant solution and PH buffer agent solution place reaction vessel, inflated with nitrogen vacuumizes three times repeatedly, remove air in the reaction vessel, charge into the trifluorochloroethylene monomer then, and adding oxidizing agent solution, open and stir and thermostat, be not more than 30 ℃ by the refrigerating unit control reaction temperature, treat to pick up counting behind the temperature-stable, reaction 12～24h is when pressure is reduced to 0.05～0.1MPa in the reactor, reaction finishes, unreacted gaseous monomer in the reaction vessel is removed in decompression, opens reactor and takes out synthetic fluorocarbon resin emulsion, and sealing is preserved.
Basic recipe is as follows:
Constituent mass per-cent
Trifluorochloroethylene 17-22%
VINYL ISOBUTYL ETHER or ethyl vinyl ether or vinyl acetate 12-22%
Hydroxy butyl vinyl ether 0.8-2.2%
Undecylenic acid 1.2-2.5%
Vinylformic acid polyoxyethylene ester 2.2-4.3%
Polyoxyethylene nonylphenol ether (polymerization degree is between 7～40) 1.2-2.5%
Ammonium perfluorocaprylate 0.2-1.7%
Ammonium persulphate/Potassium Persulphate 0.4-0.8%
Sodium bisulfite 0.1-0.5%
Sodium bicarbonate 0.2-0.8%
Deionized water 46-52%
Wherein the synthetic method of vinylformic acid polyoxyethylene ester is as follows:
Add quantitative vinylformic acid, polyoxyethylene nonylphenol ether, p-methyl benzenesulfonic acid and Resorcinol in reaction vessel, 120 ℃ of 3～4h that reflux are warming up to about 140 ℃ and keep 1h; Be cooled to 120 ℃ then, most of unreacted acid and water byproduct are removed in underpressure distillation; The NaOH solution neutralization of adding 5% remains in p-methyl benzenesulfonic acid, Resorcinol and the unreacted vinylformic acid in the system, with deionized water washing 3～5 times, at 80 ℃ of static 1～3h, makes system layering then; Remove lower floor's moisture, and, obtain vinylformic acid polyoxyethylene ester macromonomer with anhydrous sodium sulfate dehydration 2～3h.
It is as follows wherein to fill a prescription:
Amounts of components (mole)
Polyoxyethylene nonylphenol ether 1
Vinylformic acid 0.8～1.2
0.5～3% of p-methyl benzenesulfonic acid vinylformic acid and polyoxyethylene nonylphenol ether total mass
0.3～0.8% of Resorcinol vinylformic acid and polyoxyethylene nonylphenol ether total mass
The vinylformic acid polyoxyethylene ester has following structure:
Wherein y is more than or equal to 7, is less than or equal to 40 integer.
Adopting trifluorochloroethylene and alkyl vinyl ether or vinyl acetate is main comonomer, and alkyl vinyl ether comprises ethyl vinyl ether and VINYL ISOBUTYL ETHER in the step (1).
Compound emulsifying agent comprises polyoxyethylene nonylphenol ether and ammonium perfluorocaprylate mixture in the step (1), and wherein the polymerization degree of polyoxyethylene nonylphenol ether is between 7～40.
Oxygenant described in step (2), (3) is ammonium persulphate or Potassium Persulphate; Described reductive agent is a sodium bisulfite; Described PH buffer reagent is a sodium bicarbonate.
The silicone-modified polyacrylate emulsion is the multipolymer of methyl methacrylate, butyl acrylate, vinylformic acid and vinyl trialkyl oxysilane (wherein alkyl is methyl, ethyl or butyl), silicon content 15%～20%.It is 200410067409.1 Chinese patent that concrete preparation method sees also application number.
Other starting material are commercially available.
Preparation technology of the present invention is as follows:
With fluoropolymer emulsion and silicone-modified polyacrylate emulsion is filmogen; Ammonium polyphosphate, melamine phosphate, trimeric cyanamide and tetramethylolmethane are fire proofing additive.At first by the frie retardant coating amounts of components weighing of the invention described above good after, earlier fluoropolymer emulsion and silicone-modified polyacrylate emulsion are mixed, put together with fire proofing additive, filler and film coalescence aid then and mix 10～30 minutes, again through sand mill or/and add the expanded graphite of above-mentioned component behind the ball mill grinding, promptly get finished product of the present invention after mixing.
Perhaps at first by the frie retardant coating amounts of components weighing of the invention described above good after, earlier fire proofing additive and filler are put together and stir, and fluoropolymer emulsion, silicone-modified polyacrylate emulsion and film coalescence aid mixed, then mixed emulsion is under agitation joined in the mixture of fire proofing additive and filler, continued to mix 10～30 minutes, again through sand mill or/and add the expanded graphite of above-mentioned component behind the ball mill grinding, promptly get finished product of the present invention after mixing.
The present invention has following advantage:
1. because resistant to elevated temperatures fluoropolymer emulsion of employing and silicone-modified polyacrylate emulsion are filmogen, can bear the characteristics that the hydro carbons fire is rapidly heated, fire endurance can reach more than the 90min (coat-thickness 2mm).
2. because frie retardant coating of the present invention is on the basis of used usually ammonium polyphosphate class fire proofing additive, add melamine phosphate as char forming catalyst and whipping agent, and add expanded graphite as foam material, this expanded graphite is a class natural minerals, has metalluster, grey black, the soft tool soapy feeling of matter, flakey, the violent foaming and intumescing to more than 200 ℃ time that is heated, the rate of expansion maximum can reach about 350 times of own vol, has therefore improved the frothing percentage of coating greatly, depth of foam can reach 30～50 times of former coat-thickness, thereby has improved fire endurance.
3. preparation technology of the present invention is simple, with low cost, be widely used.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is further described.
Embodiment 1
See also 4 frie retardant coating prescriptions of the present invention that table 1 is enumerated.At first, press and fill a prescription 1 in the table 1 earlier with in fluoropolymer emulsion and the silicone-modified polyacrylate emulsion adding agitation vat, after stirring, add fire proofing additive (ammonium polyphosphate, melamine phosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, zinc oxide, kaolin and aluminum silicate fiber) and propylene glycol, stir after 20 minutes, go into sand mill and grind together, add expanded graphite then, mix the discharging barrelling.The performance of gained frie retardant coating of the present invention sees Table 2 prescription 1.
Embodiment 2
Press and fill a prescription 2 in the table 1 earlier with in fluoropolymer emulsion and the silicone-modified polyacrylate emulsion adding agitation vat, after stirring, add fire proofing additive (ammonium polyphosphate, melamine phosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, zinc oxide, kaolin and aluminum silicate fiber) and propylene glycol, stir after 10 minutes, go into sand mill and grind together, sent into grinding in ball grinder again 15 minutes, add expanded graphite then, mix the discharging barrelling.The performance of gained frie retardant coating of the present invention sees Table 2 prescription 2.
Embodiment 3
Press and fill a prescription 3 in the table 1 earlier with in fluoropolymer emulsion and the silicone-modified polyacrylate emulsion adding agitation vat, stir, add fire proofing additive (ammonium polyphosphate, melamine phosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, zinc oxide, kaolin and aluminum silicate fiber) and propylene glycol, stir after 30 minutes, going into ball mill grinds together, add expanded graphite then, mix, the discharging barrelling.The performance of gained frie retardant coating of the present invention sees Table 2 prescription 3.
Embodiment 4
Earlier fire proofing additive (ammonium polyphosphate, melamine phosphate, trimeric cyanamide, tetramethylolmethane) and filler (titanium dioxide, zinc oxide, kaolin and aluminum silicate fiber) are mixed in agitation vat by prescription in the table 14, and fluoropolymer emulsion, silicone-modified polyacrylate emulsion and propylene glycol are mixed in another agitation vat.Slowly mixed emulsion is added in the mixture of fire proofing additive and filler while stirring then.Add the back and continue to stir 20 minutes, go into sand mill and grind together, add expanded graphite then, mix the discharging barrelling.The performance of gained frie retardant coating sees Table 2 prescription 4.
Above-mentioned example explanation: the present invention is owing to adopted fluoropolymer emulsion and silicone-modified polyacrylate emulsion as filmogen, and adopt melamine phosphate as char forming catalyst and whipping agent, adopt expanded graphite as swelling agent simultaneously, by these three aspects the conventional thin fire-proof dilatation is improved, the coating of product is burnt very soon standing the hydro carbons fire Shi Buhui that is rapidly heated, and therefore the fire that is caused by the hydro carbons fire is had the favorable protection effect.
Comparative example
Press comparative example prescription in the table 1, adopt embodiment 1 same method to prepare frie retardant coating.The performance of gained coating sees Table 2 comparative example.
Table 1 anti-hydro carbons fire superthin expansion steel structure fireproof coating of the present invention and comparative example prescription (unit: kg)
| Material name | Prescription 1 | Prescription 2 | Prescription 3 | Prescription 4 | Comparative example |
| Fluoropolymer emulsion | 35 | 35 | 35 | 30 | - |
| The silicone-modified polyacrylate emulsion | 5 | 5 | 5 | 10 | - |
| Commercially available benzene emulsion (BC-01) | - | - | - | - | 40 |
| Ammonium polyphosphate | 15 | 15 | 10 | 15 | 18 |
| Melamine phosphate | 8 | 8 | 10 | 8 | - |
| Trimeric cyanamide | 5 | 5 | 7 | 5 | 10 |
| Tetramethylolmethane | 12 | 12 | 12 | 12 | 12 |
| Expanded graphite | 4 | 4 | 5 | 4 | - |
| Zinc oxide | 0 | 5 | 0 | 0 | 4 |
| Titanium dioxide | 5 | 0 | 5 | 5 | 5 |
| Kaolin | 5 | 5 | 5 | 5 | 5 |
| Aluminum silicate fiber | 3 | 3 | 3 | 3 | 3 |
| Propylene glycol | 3 | 3 | 3 | 3 | 3 |
The salient features of table 2 frie retardant coating of the present invention reaches and the comparison that has coating now
| Performance project | Prescription 1 | Prescription 2 | Prescription 3 | Prescription 4 | Comparative example | |
| Surface drying time (h) | 2 | 2 | 2 | 2 | 2 | |
| Dry splitting resistance of initial stage | Flawless | Flawless | Flawless | Flawless | Flawless | |
| Cohesive strength (MPa) | 0.75 | 0.68 | 0.82 | 0.70 | 0.24 | |
| Water tolerance (h) | ＞24 | ＞24 | ＞24 | ＞24 | ＞24 | |
| Cold-resistant thermal cycling (inferior) | ＞15 | ＞24 | ＞24 | ＞24 | ＞24 | |
| Fire performance | Coat-thickness (mm) | 2 | 2 | 2 | 2 | 2 |
| Depth of foam (mm) | 55 | 68 | 78 | 65 | 28 | |
| Fire endurance (min) | 95 | 92 | 105 | 90 | 30 | |
Annotate: every index is all measured by the method for GB14907-2002 " steel structure fire-proof paint " regulation in the table, and wherein the fire performance test adopts 90
#Gasoline acts as a fuel.
Claims (10)
1. the superthin expansion steel structure fireproof coating of an anti-hydro carbons fire, it is characterized in that: by fluoropolymer emulsion and silicone-modified polyacrylate emulsion is filmogen, use ammonium polyphosphate class fire proofing additive, melamine phosphate and graphite are swelling agent, and to be aided with zinc oxide, titanium dioxide, kaolin and aluminum silicate fiber be filler, and propylene glycol is a film coalescence aid.
2. the preparation method of the superthin expansion steel structure fireproof coating of the described anti-hydro carbons fire of claim 1 is characterized in that may further comprise the steps:
With fluoropolymer emulsion and silicone-modified polyacrylate emulsion is filmogen; Ammonium polyphosphate, melamine phosphate, trimeric cyanamide and tetramethylolmethane are fire proofing additive; With each amounts of components weighing good after, earlier fluoropolymer emulsion and silicone-modified polyacrylate emulsion are mixed, put together with fire proofing additive, filler and film coalescence aid then and mix 10～30 minutes, after grinding, add the expanded graphite of above-mentioned component again, get final product after mixing.
3. the preparation method of the superthin expansion steel structure fireproof coating of anti-hydro carbons fire according to claim 1 is characterized in that may further comprise the steps:
With fluoropolymer emulsion and silicone-modified polyacrylate emulsion is filmogen; Ammonium polyphosphate, melamine phosphate, trimeric cyanamide and tetramethylolmethane are fire proofing additive; With each amounts of components weighing good after, earlier fire proofing additive and filler are put together and stir, and fluoropolymer emulsion, silicone-modified polyacrylate emulsion and film coalescence aid mixed, then mixed emulsion is under agitation joined in the mixture of fire proofing additive and filler, continued to mix 10～30 minutes, after grinding, add the expanded graphite of above-mentioned component again, get final product after mixing.
4. according to the preparation method of the superthin expansion steel structure fireproof coating of claim 2 or 3 described anti-hydro carbons fire, it is characterized in that:
Concrete composition proportioning is as follows:
Amounts of components (wt%)
Fluoropolymer emulsion 30～40
Silicone-modified polyacrylate emulsion 5～10
Ammonium polyphosphate 15～20
Melamine phosphate 5～10
Trimeric cyanamide 3～7
Tetramethylolmethane 10～15
Expanded graphite 4～10
Zinc oxide 0～6
Titanium dioxide 0～5
Kaolin 0～10
Aluminum silicate fiber 2～5
Propylene glycol 2～5.
5. the preparation method of the superthin expansion steel structure fireproof coating of anti-hydro carbons fire according to claim 4 is characterized in that: the solids content of fluoropolymer emulsion is 40%～45%; The solids content of silicone-modified polyacrylate emulsion is 45%～50%.
6. the preparation method of the superthin expansion steel structure fireproof coating of anti-hydro carbons fire according to claim 1, it is characterized in that: the polymkeric substance in the described fluoropolymer emulsion is the multipolymer of trifluorochloroethylene, alkyl vinyl ether, undecylenic acid, hydroxy butyl vinyl ether and vinylformic acid polyoxyethylene ester, fluorine content 21%～25%.
7. the superthin expansion steel structure fireproof coating of anti-hydro carbons fire according to claim 6 is characterized in that: described alkyl vinyl ether, and wherein alkyl is ethyl or butyl; Described vinylformic acid polyoxyethylene ester, the wherein polyoxyethylated polymerization degree is 7～40.
8. anti-hydro carbons fire superthin expansion steel structure fireproof coating according to claim 1, it is characterized in that: described silicone-modified polyacrylate emulsion is the multipolymer of methyl methacrylate, butyl acrylate, vinylformic acid and vinyl trialkyl oxysilane, silicon content 15%～20%.
9. anti-hydro carbons fire superthin expansion steel structure fireproof coating according to claim 8, it is characterized in that: described vinyl trialkyl oxysilane, wherein alkyl is methyl or ethyl or butyl.
10. anti-hydro carbons fire superthin expansion steel structure fireproof coating according to claim 1 is characterized in that: add trimeric cyanamide phosphoric acid in the coating as whipping agent and carbon forming agent; Described ammonium polyphosphate class fire proofing additive is ammonium polyphosphate, trimeric cyanamide and tetramethylolmethane compound system.
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Assignee: Suzhou Jinjin Curtrin Wall Co.,Ltd. Assignor: Tongji University Contract record no.: 2010320000487 Denomination of invention: Ultra-thin expansion steel structure fire-proof paint capable of resisting hydrocarbons fire and preparation method thereof Granted publication date: 20090624 License type: Exclusive License Open date: 20070314 Record date: 20100428 |
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