CN101747817A - Water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof - Google Patents
Water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof Download PDFInfo
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- CN101747817A CN101747817A CN200810204426A CN200810204426A CN101747817A CN 101747817 A CN101747817 A CN 101747817A CN 200810204426 A CN200810204426 A CN 200810204426A CN 200810204426 A CN200810204426 A CN 200810204426A CN 101747817 A CN101747817 A CN 101747817A
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Abstract
The invention relates to a water-based halogen-free steel structure ultra-thin expansion fireproof coating and a preparation method thereof; the fireproof coating comprises components in the following content by weight percentage: 22 to 25 percent of acrylic latex, 33 to 40 percent of fire retarding agent, 5 to 9 percent of filler, 1 to 3 percent of film forming additive, and the balance water. Compared with the prior art, the invention adopts the acrylic latex as the film forming substance and adopts expandable graphite as the expansion reinforcing filler, so as to improve the expansion rate and the carbonized layer quality of the fireproof coating, so that the expansion carbonized layer can reach 25 times of the thickness of the traditional coating; when the coating thickness is 2mm, the fire resistance limit can reach 90min; and therefore, the invention has the advantages of higher fire resistance limit, good fireproof and waterproof performance, excellent brushing and spraying performance, simple and convenient construction, low cost, wide application, simple preparation process, environment friendliness and the like.
Description
Technical field
The present invention relates to frie retardant coating, relate in particular to a kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof.
Background technology
Advantages such as steel construction has that intensity height, good toughness, construction are easy to make, good ductility and shock resistance, obtained widespread use at aspects such as high-rise building, super-span bridges, but it also has fatal weakness, and promptly the resistivity against fire of steel building is poor more than skeleton construction or masonry structure.This mainly is because very easily heat conduction of steel, can lose rigidity rapidly and cause buildings to collapse under high temperature action.Steel construction fire cases and result of study according to a large amount of heavinesses show, the intensity of steel is functions of temperature, and reduce along with the rising of temperature, when temperature surpasses a certain threshold value (critical temperature of common iron is generally 540 ℃), the intensity of steel will be reduced to 40～50% under the normal temperature situation, cause its supporting capacity sharply to descend and also finally make building collapse, caused great loss of life and personal injury and financial loss.
Therefore, it is significant steel building to be carried out flameproof protection.At present the method for in the world steel building being carried out flameproof protection can be divided into the method for dredging and blocking cut-off process, and wherein blocking cut-off process comprises envelope, screen method, water spraying process, spraying method etc. again.In numerous methods, spraying method is ideal and reliable.It is directly to spray certain thickness frie retardant coating or fire resistant fluid on the surface of steel; they can play the provide protection of fire-proof and thermal-insulation when running into fire or high temperature; prevent that steel from heating up rapidly and intensity is reduced, and avoids steel construction to cause building collapse because of losing supporting capacity in fire.Also striven for the time simultaneously for the safe escape of personnel in the building of catching fire.
Superthin expansion steel structure fireproof coating is meant that coat-thickness is no more than the steel structure fire-proof paint of 3mm, foaming and intumescing when this class steel structure fire-proof paint is subjected to fire, can form the refractory insulating layer above the densification of tens times of self thickness, be the focus of frie retardant coating research in recent years.It can adopt spraying, brushing or roller coating construction, general use require fire endurance 2 hours with interior construction steel structure on.Compare with other frie retardant coating, ultrathin expansion steel structure fire-proof paint granularity is thinner, coating is thinner, easy construction, ornamental its outstanding advantage that is more preferably.When satisfying fire protection requirement, can satisfy the high requirement of decorating again to exposed steel construction.This class coating is the steel structure fire-proof paint that enjoys the user to favor at present.
At present, the superthin expansion steel structure fireproof coating great majority on the market are solvent-borne type, can discharge a large amount of noxious solvent (toluene, dimethylbenzene etc.) in construction process, and are not only harmful to workmen's health, also pollute the environment.Simultaneously, have halogen containing flame-retardant in the most solvent-borne type frie retardant coating, the toxic gas that halogen containing flame-retardant generates in fire also can work the mischief to the escape personnel.Water-based halogen-free ultrathin expansion type steel structure coating is when keeping good fire resistance, halogen can solve the widely-used and volatile solvent of steel structure fire-proof paint and the contradiction that halogen containing flame-retardant pollutes to the harm of human body in solution problem of environmental pollution and the fire.In sum, develop the active demand that a kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating has become the frie retardant coating industry.
High quality frie retardant coating in the market is solvent-borne type, though the research of aqueous fire-proof coating has obtained some progress, and also has product to come out, and its over-all properties can not show a candle to the solvent-borne type frie retardant coating.
The fire endurance time of the polyacrylate dispersion that existing aqueous fire-proof coating extensively adopts is shorter, and the intensity of expansion charring layer is not high, and under the intense impact of flame, charring layer very easily comes off, and makes steel lose protection.So development aqueous fire-proof coating key issue is the base-material emulsion that lacks a kind of excellent property.
Summary of the invention
Purpose of the present invention is exactly to provide water-based halogen-free steel structure ultra-thin expansion fireproof coating that a kind of fire resistance is good, spraying property is good and preparation method thereof for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating is characterized in that, this frie retardant coating comprises following component and content (wt%):
Organosilicon crylic acid latex 22～25;
Fire proofing additive 33～40;
Filler 5～9;
Film coalescence aid 1～3;
Water surplus.
The solid content of described organosilicon crylic acid latex is 35wt%～50wt%.
Described fire proofing additive comprises ammonium polyphosphate, trimeric cyanamide and tetramethylolmethane, and the content (wt%) that they account for frie retardant coating is respectively 17～20,10～12 and 6～8.
The polymerization degree of described ammonium polyphosphate=1000.
Described filler comprises titanium dioxide, kaolin and expansible black lead, and the content (wt%) that they account for frie retardant coating is respectively 2～4,1～2 and 2～3.
Described expansible black lead is a flakey, and granularity is 0.15mm～0.3mm, and allowance for expansion is 100ml/g～200ml/g, and initial expansion temperature is 150 ℃～200 ℃.
Described film coalescence aid is selected from 2,2,4-trimethylammonium-1,3-pentanediol mono isobutyrate.
A kind of preparation method of water-based halogen-free steel structure ultra-thin expansion fireproof coating is characterized in that, this method may further comprise the steps:
(1) get the raw materials ready according to following component and content (wt%):
Organosilicon crylic acid latex 22～25
Fire proofing additive 33～40
Filler 5～9
Film coalescence aid 1～3
Water surplus;
(2) water, fire proofing additive and filler are mixed, use rotating speed to stir 20 minutes as the high-speed stirring instrument of 1000r/min, ground 10 minutes through three-roll grinder again, add organosilicon crylic acid latex and film coalescence aid then, use rotating speed to continue to mix 5 minutes, make water-based halogen-free steel structure ultra-thin expansion fireproof coating as 600r/min high-speed stirring instrument.
A kind of preparation method of water-based halogen-free steel structure ultra-thin expansion fireproof coating is characterized in that, this method may further comprise the steps:
(1) get the raw materials ready according to following component and content (wt%):
Organosilicon crylic acid latex 22～25
Fire proofing additive 33～40
Filler 5～9
Film coalescence aid 1～3
Water surplus;
(2) water, organosilicon crylic acid latex, fire proofing additive, filler and film coalescence aid are mixed, use rotating speed to mix 30 minutes, ground 10 minutes through three-roll grinder again, make water-based halogen-free steel structure ultra-thin expansion fireproof coating as the high-speed stirring instrument of 1000r/min.
In organosilicon crylic acid latex, organosilicon segmental Si-O bond energy (450kJ/mol) has performances such as good thermotolerance, weathering resistance, gloss retention and ultraviolet light much larger than C-O bond energy (345kJ/mol) and C-C bond energy (351kJ/mol).Simultaneously, surface of silicone resin can be low, is difficult for laying dust, has anti-stain characteristic, and acrylic resin also has good weathering resistance and gloss retention, so that organosilicon crylic acid latex has super-weathering resistance, high dirt resistance and a resistant of high or low temperature is good, is a kind of coating emulsion of tool exploitation future.
Expansible black lead is higher than 150 ℃ in temperature to begin to expand, and its expansion multiplying power can be up to more than 100 times.After expanding, expansible black lead becomes the very low vermiform of density by flakey, and vermiform charing material interts in the expansion charring layer of coating, not only can improve the intensity of expansion charring layer, prevent its cracking, can also increase its expansion multiplying power, increase the fire resistance of frie retardant coating.
As filmogen, it provides the sticking power of coating to steel with organosilicon crylic acid latex in the present invention, and to the cohesive force of other components in the coating etc.Owing to contain the organosilicon segment in the organosilicon crylic acid latex, the water resistance and the weather resistance of frie retardant coating can be improved significantly, and the characteristics that are rapidly heated when catching fire can be born, when coat-thickness was 2mm, fire endurance can reach more than the 90min.
The present invention adopts expansible black lead as the expansion reinforcing filler, expansible black lead can expand after being heated and form fine and close vermiform charing material, increase charring layer intensity, and intert in the expansion charring layer, not only can improve the intensity of expansion charring layer, can also increase the expansion multiplying power of frie retardant coating, bring into play heat insulation, oxygen barrier effect, can delay the thermal degradation process of coating effectively, play the effect that improves the coating fire resistance.Expansible black lead can absorb a large amount of heats in the expanded by heating process simultaneously, thereby further improves the fire resistance of coating.
Fire proofing additive of the present invention adopts the ammonium polyphosphate (DP＞1000) of high-polymerization degree as carbonifying catalyst, the solubleness of the ammonium polyphosphate of high-polymerization degree is littler, can prevent that it from separating out in the environment of humidity or water, improve the water resistance of coating from coating.
Raw materials used benzene series thing, organic chloride, freon series, organic ketone, amine, alcohol, ether, ester, acid and the contour VOC of petroleum hydrocarbon compound (the Volatile Organic Compound of not containing of the present invention, volatilizable organic compound) material is the environmentally friendly coating products with good use properties.
Compared with prior art, it is filmogen that the present invention adopts organosilicon crylic acid latex, and adopt expansible black lead as the expansion reinforcing filler, thereby improve the expansion multiplying power and the charring layer quality of frie retardant coating, the expansion charring layer can reach 25 times of former coat-thickness, fire endurance can reach 90min when coat-thickness is 2mm, make it have higher fire endurance, and have good fire prevention, water resistance, and brushing, spraying property, construction is simple, convenient, with low cost, be widely used advantage such as preparation technology is simple, and is environmentally friendly.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Among following embodiment 1～embodiment 5, the solid content of organosilicon crylic acid latex is 35wt%～50wt%, the polymerization degree of ammonium polyphosphate=1000, expansible black lead are flakey, and granularity is 0.15mm～0.3mm, allowance for expansion is 100ml/g～200ml/g, initial expansion temperature is 150 ℃～200 ℃, and film coalescence aid is 2,2,4-trimethylammonium-1, the 3-pentanediol mono isobutyrate.
Embodiment 1
A kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof may further comprise the steps:
At first, earlier water, fire proofing additive (ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, kaolin and expansible black lead) are stirred by prescription in the table 11, use rotating speed to stir 20 minutes as the high-speed stirring instrument of 1000r/min, ground 10 minutes through three-roll grinder again, then organosilicon crylic acid latex and film coalescence aid are joined in the agitation vat, join after stirring in the powder that stirs in advance, use rotating speed to continue to mix discharging barrelling after 5 minutes as 600r/min high-speed stirring instrument.
The performance of gained frie retardant coating of the present invention sees Table 2 prescription 1.
Embodiment 2
A kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof may further comprise the steps:
Earlier water, fire proofing additive (ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, kaolin and expansible black lead) are stirred by prescription in the table 12, use rotating speed to stir 20 minutes as the high-speed stirring instrument of 1000r/min, ground 10 minutes through three-roll grinder again, then organosilicon crylic acid latex and film coalescence aid are joined in the agitation vat, join after stirring in the powder that stirs in advance, use rotating speed to continue to mix discharging barrelling after 5 minutes as 600r/min high-speed stirring instrument.
The performance of gained frie retardant coating of the present invention sees Table 2 prescription 2.
Embodiment 3
A kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof may further comprise the steps:
Earlier water, organosilicon crylic acid latex, fire proofing additive (ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, kaolin and expansible black lead) and film coalescence aid are stirred by prescription in the table 13, use rotating speed to stir 30 minutes, discharging barrelling after three-roll grinder grinds 10 minutes again as the high-speed stirring instrument of 1000r/min.
The performance of gained frie retardant coating of the present invention sees Table 2 prescription 3.
Embodiment 4
A kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof may further comprise the steps:
Earlier water, organosilicon crylic acid latex, fire proofing additive (ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane), filler (titanium dioxide, kaolin and expansible black lead) and film coalescence aid are stirred by prescription in the table 14, use rotating speed to stir 30 minutes, discharging barrelling after three-roll grinder grinds 10 minutes again as the high-speed stirring instrument of 1000r/min.
The performance of gained frie retardant coating sees Table 2 prescription 4.
Table 1 water-based steel-structure ultrathin intumescent fire retardant coating of the present invention proportioning (unit: kg)
| Material name | Prescription 1 | Prescription 2 | Prescription 3 | Prescription 4 |
| Deionized water | ??23.0 | ??36.0 | ??23.0 | ??36.0 |
| Organosilicon crylic acid latex | ??25.0 | ??22.0 | ??25.0 | ??22.0 |
| Ammonium polyphosphate | ??20.0 | ??18.0 | ??20.0 | ??18.0 |
| Material name | Prescription 1 | Prescription 2 | Prescription 3 | Prescription 4 |
| Trimeric cyanamide | ??12.0 | ??10.0 | ??12.0 | ??10.0 |
| Tetramethylolmethane | ??8.0 | ??7.0 | ??8.0 | ??7.0 |
| Expansible black lead | ??3.0 | ??2.0 | ??3.0 | ??2.0 |
| Titanium dioxide | ??4.0 | ??2.0 | ??4.0 | ??2.0 |
| Kaolin | ??2.0 | ??1.0 | ??2.0 | ??1.0 |
| Film coalescence aid | ??3.0 | ??2.0 | ??3.0 | ??2.0 |
The salient features of table 2 steel-structure ultrathin intumescent fire retardant coating
| Performance project | Prescription 1 | Prescription 2 | Prescription 3 | Prescription 4 |
| Time of drying (h) | ??2～3 | ??2～3 | ??2～3 | ??2～3 |
| Dry splitting resistance of initial stage | Flawless | Flawless | Flawless | Flawless |
| Cohesive strength (MPa) | ??0.60 | ??0.55 | ??0.55 | ??0.50 |
| Water tolerance (h) | ??＞24 | ??＞24 | ??＞24 | ??＞24 |
| Humidity resistance (h) | ??250 | ??250 | ??250 | ??250 |
| Expansion multiplying power | ??25 | ??21 | ??22 | ??20 |
| Coat-thickness (mm) | ??2.0 | ??2.0 | ??2.0 | ??2.0 |
| Fire endurance (min) | ??90 | ??85 | ??90 | ??80 |
The foregoing description explanation: the present invention is owing to adopted organosilicon crylic acid latex as filmogen, and adopt expansible black lead as the expansion reinforcing filler, by these three aspects existing steel-structure ultrathin intumescent is improved, the rheological property of products obtained therefrom is better, be easy to brushing, simultaneously coating is at expanded by heating after multiplying power height, and charring layer intensity height, abscess are evenly fine and close, so frie retardant coating has excellent fire resistance.
Embodiment 5
A kind of water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof may further comprise the steps:
(1) get the raw materials ready according to following component and content (wt%):
| Material name | Weight (Kg) |
| Deionized water | ??35.0 |
| Organosilicon crylic acid latex | ??24.0 |
| Ammonium polyphosphate | ??17.0 |
| Trimeric cyanamide | ??11.0 |
| Tetramethylolmethane | ??6.0 |
| Expansible black lead | ??2.0 |
| Titanium dioxide | ??3.0 |
| Kaolin | ??1.0 |
| Film coalescence aid | ??1.0 |
(2) water, fire proofing additive (ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane) and filler (titanium dioxide, kaolin and expansible black lead) are mixed, use rotating speed to stir 20 minutes as the high-speed stirring instrument of 1000r/min, ground 10 minutes through three-roll grinder again, add organosilicon crylic acid latex and film coalescence aid then, use rotating speed to continue to mix 5 minutes, make water-based halogen-free steel structure ultra-thin expansion fireproof coating as 600r/min high-speed stirring instrument.
Claims (9)
1. a water-based halogen-free steel structure ultra-thin expansion fireproof coating is characterized in that, this frie retardant coating comprises following component and content (wt%):
Organosilicon crylic acid latex 22～25;
Fire proofing additive 33～40;
Filler 5～9;
Film coalescence aid 1～3;
Water surplus.
2. water-based halogen-free steel structure ultra-thin expansion fireproof coating according to claim 1 is characterized in that, the solid content of described organosilicon crylic acid latex is 35wt%～50wt%.
3. water-based halogen-free steel structure ultra-thin expansion fireproof coating according to claim 1, it is characterized in that, described fire proofing additive comprises ammonium polyphosphate, trimeric cyanamide and tetramethylolmethane, and the content (wt%) that they account for frie retardant coating is respectively 17～20,10～12 and 6～8.
4. water-based halogen-free steel structure ultra-thin expansion fireproof coating according to claim 3 is characterized in that, the polymerization degree of described ammonium polyphosphate=1000.
5. water-based halogen-free steel structure ultra-thin expansion fireproof coating according to claim 1 is characterized in that described filler comprises titanium dioxide, kaolin and expansible black lead, and the content (wt%) that they account for frie retardant coating is respectively 2～4,1～2 and 2～3.
6. water-based halogen-free steel structure ultra-thin expansion fireproof coating according to claim 5, it is characterized in that described expansible black lead is a flakey, granularity is 0.15mm～0.3mm, allowance for expansion is 100ml/g～200ml/g, and initial expansion temperature is 150 ℃～200 ℃.
7. water-based halogen-free steel structure ultra-thin expansion fireproof coating according to claim 1 is characterized in that described film coalescence aid is selected from 2,2,4-trimethylammonium-1,3-pentanediol mono isobutyrate.
8. the preparation method of a water-based halogen-free steel structure ultra-thin expansion fireproof coating as claimed in claim 1 is characterized in that, this method may further comprise the steps:
(1) get the raw materials ready according to following component and content (wt%):
Organosilicon crylic acid latex 22～25
Fire proofing additive 33～40
Filler 5～9
Film coalescence aid 1～3
Water surplus;
(2) water, fire proofing additive and filler are mixed, use rotating speed to stir 20 minutes as the high-speed stirring instrument of 1000r/min, ground 10 minutes through three-roll grinder again, add organosilicon crylic acid latex and film coalescence aid then, use rotating speed to continue to mix 5 minutes, make water-based halogen-free steel structure ultra-thin expansion fireproof coating as 600r/min high-speed stirring instrument.
9. the preparation method of a water-based halogen-free steel structure ultra-thin expansion fireproof coating as claimed in claim 1 is characterized in that, this method may further comprise the steps:
(1) get the raw materials ready according to following component and content (wt%):
Organosilicon crylic acid latex 22～25
Fire proofing additive 33～40
Filler 5～9
Film coalescence aid 1～3
Water surplus;
(2) water, organosilicon crylic acid latex, fire proofing additive, filler and film coalescence aid are mixed, use rotating speed to mix 30 minutes, ground 10 minutes through three-roll grinder again, make water-based halogen-free steel structure ultra-thin expansion fireproof coating as the high-speed stirring instrument of 1000r/min.
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| CN106752580A (en) * | 2016-12-16 | 2017-05-31 | 芜湖天鸿汽车零部件有限公司 | A kind of automobile fireproof coating and preparation method thereof |
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| CN109735190A (en) * | 2019-01-15 | 2019-05-10 | 南京展拓消防设备有限公司 | A kind of the indoor ultrathin fireproof coating and its preparation process of environmental protection |
| CN111117458A (en) * | 2019-12-30 | 2020-05-08 | 深圳深景达油墨化工有限公司 | Ultrathin steel structure fireproof coating and preparation method thereof |
| CN112159631A (en) * | 2020-09-29 | 2021-01-01 | 尹书祥 | Expandable fireproof armor and application thereof |
| CN112159631B (en) * | 2020-09-29 | 2022-02-08 | 尹书祥 | Expandable fireproof armor and application thereof |
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Open date: 20100623 |