CN101077953A - Water super-thin steel structure fire-proof paint and preparation method thereof - Google Patents
Water super-thin steel structure fire-proof paint and preparation method thereof Download PDFInfo
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- CN101077953A CN101077953A CN 200710035289 CN200710035289A CN101077953A CN 101077953 A CN101077953 A CN 101077953A CN 200710035289 CN200710035289 CN 200710035289 CN 200710035289 A CN200710035289 A CN 200710035289A CN 101077953 A CN101077953 A CN 101077953A
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Abstract
The water-thinned fireproof paint for steel structure consists of acrylic emulsion, ammonium polyphosaphate, pentaerythritol, melamine, expandable graphite, aluminum hydroxide, defoaming agent, leveling agent, dispersant, plasticizer, coupling agent and water. It is prepared through mixing and grinding the materials in a ball mill and filtering. The water-thinned fireproof paint has high fire retarding performance, short drying time, no pollution, low cost and other features.
Description
Technical field
The present invention relates to a kind of water super-thin steel structure fire-proof paint and preparation method thereof, belong to the novel material of chemical industry paint field.
Background technology
Because steel construction has intensity height, good toughness, easy to make, series of advantages such as speed of application is fast, building cycle is short, and obtain more and more widely application already in modern architecture.But the characteristics of its fire performance difference are the problems that people are concerned about always.The spraying steel structure fire-proof paint is one of measure of economical rationality the most in the steel structure fireproofing measure.
The ultra-thin fire-resistant coating coating is met fire and is expanded, and rate of expansion is higher, can form the charring layer of tens times even tens times, and the densification of charing foam layer is solid, and fire endurance is 0.5 hour to 3 hours.The coat-thickness of super-thin steel structure fire-proof paint is little, and color is abundant, and decorative appearance is fine, can reach the effect of common buildings coating, and coating consumption and project total cost are significantly less than thick type and thin section steel structure fire-resisting paint during construction.Load-bearing steel member flameproof protection at building and structures; Lightweight Steel Construction and the rack shape roof exposed as factory building, gymnasium etc., and at the steel building of industries such as oil, chemical industry, metallurgy, electric power, coal and be used for the indoor aspect such as various pipe fittings of fp that needs and obtained application more and more widely.
A lot of extremely successful ultra-thin fire-resistant coating systems are just arranged in the world, the Water Based3832 formed steel construction frie retardant coating (water-soluble) of external German He Baizi company (Herberts), coat-thickness 2.63mm, fire endurance 63mi at present.The A/D FIREFILM frie retardant coating of Canada A/D fire prevention limited liability company, coat-thickness 2.58mm, fire endurance 2h etc.This type of frie retardant coating of domestic production, the number of patent application of the more representational Cheng Qunchao of having invention is 02125515.6, denomination of invention is " multipurpose expanding fireproof paint ", raw material is a base-material by ethene-vinyl acetate copolymer emulsion and modified resin in batching, trimeric cyanamide and dicyanodiamide are whipping agent, tetramethylolmethane is a char-forming agent, ammonium polyphosphate is a carbonifying catalyst, and clorafin is a fire retardant, and silicon-dioxide, titanium dioxide are that filler and other auxiliary agents are formed.The base-material that this invention adopts water-based emulsion and modified resin to be mixed, its base-material consumption is less, and its weather resistant is had bigger influence; The fire retardant consumption is more in the prescription, and the price of fire retardant is more expensive relatively, and large usage quantity, has therefore also increased the cost of this product.
Therefore, develop a kind of novel water super-thin steel structure fire-proof paint and preparation method thereof for being badly in need of.
Summary of the invention
The object of the present invention is to provide a kind of novel water super-thin steel structure fire-proof paint and preparation method thereof; can overcome the deficiency of existing steel structure fire-proof paint; have that excellent performance, starting material are easy to get, characteristics such as cost is low, environmentally safe; be subjected to form uniform and stable expansion charring layer behind the fire; thereby steel and iron member is played a protective role, simultaneously.This coating fast drying, easy construction, and manufacture craft is simple, convenient.
The mass percent of water super-thin steel structure fire-proof paint of the present invention is composed as follows:
ACRYLIC EMULSION 26.0%～33.0%, ammonium polyphosphate 12.0%～16.0%, tetramethylolmethane 4.8%～13.2%, trimeric cyanamide 2.0%～5.0%, expansible black lead 2.0%～5.0%, aluminium hydroxide 8.0%～12.0%, defoamer accounts for 0.20%～0.50%, and flow agent accounts for 0.20%～0.30%, dispersion agent accounts for 0.20%～0.40%, softening agent accounts for 2.0%～3.0%, and coupling agent accounts for 0.1%～0.2%, adds water to 100% then.
ACRYLIC EMULSION is a filmogen in this coating, and it provides the sticking power of coating to base material, the cohesive force of other components etc. during coating is formed, because its consumption is more relatively, film forming properties is better, can significantly improve the weather resistance of coating.
Ammonium polyphosphate is as carbonifying catalyst, it is the material that helps the hydroxy-containing compounds dehydration, major function is the thermolysis process that promotes and change coating, promote the organics dehydration of hydroxyl in the coating to form nonflammable three-D space structure carbonaceous layer, isolate shielded base material and burning things which may cause a fire disaster, the amount of the flammable tar that the minimizing thermolysis produces, aldehyde, ketone; Discharge the concentration that water vapour waters down inflammable gas and ambient oxygen simultaneously, stop the big oxidation of coal reaction of thermal discharge to take place.
Tetramethylolmethane can be heated into charcoal separately or under the carbonifying catalyst effect as char-forming agent, is the basic substance that coating at high temperature forms the foam charring layer of nonflammable three-D space structure, and the foam charring layer is played skeleton function.
Trimeric cyanamide is as whipping agent, meets can decompose when hot to discharge non-flammable gases, and as ammonia, carbonic acid gas, water vapour etc., these non-flammable gases expand coating, form spongy porous foam structure in coating.
Expansible black lead is a kind of physical expansion agent, can form form compact and stable expansion charcoal layer after being heated, expansion charcoal layer has well anti-fiery ability, in fire, can resist the invasion and attack of flame, and then effectively heat insulation, the oxygen barrier effect of performance, blocked the material between flame and the base material and the transmission of heat, delayed or suppressed the thermal destruction of polymkeric substance or the process of thermooxidative degradation, finally reached and stop the incendiary purpose.Expansible black lead will absorb a large amount of amount of heat in expansion process simultaneously, reaches the effect that reduces system temperature.
Aluminium hydroxide is not only as filler, and the fire resistance to coating also has synergy simultaneously, adds in the frie retardant coating as fire-retardant filler.The fire retardation of aluminium hydroxide has: cold-trap effect, dilution effect and barrier-layer effect.In addition, aluminium hydroxide is again simultaneously the good fumicants that presses down.Therefore, filler is selected strong covering power for use and is had the aluminium hydroxide of certain flame retardant effect.
Defoamer can reduce bubble, eliminates defectives such as shrinkage cavity, pin hole, flake.
Flow agent can improve the levelling property of frie retardant coating, eliminates phenomenons such as shrinkage cavity, pin hole, sagging.
Dispersion agent can effective wetting filler, reduces the viscosity of high solid filler.
Softening agent can improve the snappiness of coating, strengthens the ability of coating opposing rupture failure.
Coupling agent is used for reducing the surface energy of ridge filler, makes it the surface energy of convergence polymkeric substance, can increase amount of filler, improves the goods flame retardant properties, improves intensity, makes the pigment easy grinding, the work efficiency height, and Extrusion Flow is good.
Preparation method's of the present invention processing step is as follows:
(1) earlier with pulverulent material, grind by shredder, cross 200 mesh sieves;
(2) accurately take by weighing various materials successively by prescription, add ACRYLIC EMULSION earlier, add ammonium polyphosphate then, tetramethylolmethane, trimeric cyanamide, aluminium hydroxide, add flow agent again, dispersion agent, softening agent, auxiliary agents such as coupling agent and part defoamer (account for defoamer total amount 1/2～2/3), twice of moisture or repeatedly adding, add portion water earlier, reduce base-material viscosity, so that the pulverulent material that the enough wetting back of energy adds reduces the shared volume of powder, thereby increases total add-on of material, after adding, pulverulent material adds portion water again, preliminary denseness of regulating material avoids appearance too thick or too rare, so that follow-up pre-mixing and grinding scatter operation are carried out smoothly;
(3) prepare various materials, adopt the ball mill middling speed to carry out pre-mixing, stirring velocity strengthens earlier gradually, reduce again after being added to fair speed, splash, keep middling speed to stir for some time then to prevent material, rotating speed is 900r/min～1500r/min, and the pre-mixing time is 0.2h～0.5h;
(4) adopt ball mill grinding to disperse sample, dispersion medium can be aluminium sesquioxide, and it is 1.5: 1～2: 1 with the mass ratio of material, grinding at a high speed, and rotating speed is 2000r/min～4000r/min, the time is 1.5h～3h;
(5) grind to disperse latter stage, middling speed stirs and adds remainder water and defoamer down, and expansible black lead, stirring at low speed again, and rotating speed is 500r/min～800r/min, the time is 0.3h～1h, makes coating have suitable viscosity and satisfactory stability;
(6) filter grinding scattered coating, obtain water super-thin steel structure fire-proof paint of the present invention.
Feature of the present invention also is middling speed pre-mixing stirring for some time, and its rotating speed is 1000r/min～1200r/min, and the time is that 0.3h～0.4h is advisable.
Feature of the present invention is that also grinding the dispersion rotating speed at a high speed is 2500r/min～3500r/min, and the time is that 2h～2.5h is advisable.
Feature of the present invention is also to add for the second time that stirring at low speed speed is 500r/min～800r/min behind the defoamer, and churning time is that 0.4h～0.6h is advisable.
Have by the prepared frie retardant coating of above-mentioned coating prescription that excellent performance, starting material are easy to get, characteristics such as cost is low, environmentally safe, be subjected to form uniform and stable expansion charring layer behind the fire, thereby steel and iron member is played a protective role, simultaneously.This coating fast drying, easy construction, and characteristics such as manufacture craft is simple, convenience.
Embodiment
The various raw-material manufacturer that the present invention selects for use is as follows, also can select the product of other producers for use, wherein:
The BD-300 type building emulsion that ACRYLIC EMULSION can select for use east, Beijing connection chemical industry company limited to produce; Ammonium polyphosphate is that Chemical Industry Science Co., Ltd of the sincere section of Puyang produces; Tetramethylolmethane is the good occasion chemical industry company limited in Shanghai; Trimeric cyanamide is that the rich Dihua worker company limited in Tianjin produces; Expansible black lead is a Qingdao Ying Shida graphite company limited; Aluminium hydroxide is geological experiment institute in the Hunan; Optional big SD-1309 and the SD-1311 that climbs Chemical Industry Science Co., Ltd's production in sea that use of defoamer; BMC-1001S and Bermawet 1000 that flow agent and dispersion agent can select for use U.S. Bergen speciality chemical company limited to produce respectively; the chlorinated paraffin-52 that softening agent can select for use Guangzhou Zhujiang River chemical industry group Guangzhou system lacquer factory to produce, coupling agent is optional with converging KH-550 and the TMC-114 that smart Ya Nami novel material company limited produces in Shanghai.
In order to further specify the present invention,, but the invention is not restricted to embodiment now for following embodiment.
Embodiment 1
ACRYLIC EMULSION 32.5%, ammonium polyphosphate 15.4%, tetramethylolmethane 4.8%, trimeric cyanamide 3.2%, expansible black lead 4.8%, aluminium hydroxide 11.8%, defoamer 0.40%, flow agent 0.28%, dispersion agent 0.38%, softening agent 3.0%, coupling agent 0.20% adds water to 100% at last.
The preparation method of this embodiment is:
(1) earlier with pulverulent material, grind by shredder, cross 200 mesh sieves;
(2) accurately take by weighing various materials successively by prescription, add ACRYLIC EMULSION earlier, add ammonium polyphosphate then, tetramethylolmethane, trimeric cyanamide, aluminium hydroxide, add flow agent again, dispersion agent, softening agent, auxiliary agents such as coupling agent and part defoamer (account for defoamer total amount 1/2), twice adding of moisture, add portion water earlier, reduce base-material viscosity, so that the pulverulent material that the enough wetting back of energy adds reduces the shared volume of powder, thereby increases total add-on of material, after adding, pulverulent material adds portion water again, preliminary denseness of regulating material avoids appearance too thick or too rare, so that follow-up pre-mixing and grinding scatter operation are carried out smoothly;
(3) prepare various materials, adopt the ball mill middling speed to carry out pre-mixing, stirring velocity strengthens earlier gradually, reduces after being added to fair speed again, splashes to prevent material, keeps middling speed to stir for some time then, and rotating speed is 1000r/min, and the pre-mixing time is 0.3h;
(4) adopt ball mill grinding to disperse sample, dispersion medium is an aluminium sesquioxide, and it is 1.5: 1～2: 1 with the mass ratio of material, grinding at a high speed, and rotating speed is 3000r/min, the time is 2h;
(5) grind to disperse latter stage, middling speed stirs and adds remainder water and defoamer down, and expansible black lead, stirring at low speed again, and rotating speed is 600r/min, the time is 0.5h, makes coating have suitable viscosity and satisfactory stability;
(6) filter grinding scattered coating, obtain water super-thin steel structure fire-proof paint of the present invention.
Embodiment 2
ACRYLIC EMULSION 30.1%, ammonium polyphosphate 13.8%, tetramethylolmethane 9%, trimeric cyanamide 3.5%, expansible black lead 3.2%, aluminium hydroxide 10.3%, defoamer 0.35%, flow agent 0.25%, dispersion agent 0.32%, softening agent 2.8%, coupling agent 0.16% adds water to 100% at last.
The preparation method of this embodiment is:
(1) earlier with pulverulent material, grind by shredder, cross 200 mesh sieves;
(2) accurately take by weighing various materials successively by prescription, add ACRYLIC EMULSION earlier, add ammonium polyphosphate then, tetramethylolmethane, trimeric cyanamide, aluminium hydroxide, add flow agent again, dispersion agent, softening agent, auxiliary agents such as coupling agent and part defoamer (account for defoamer total amount 2/3), twice of moisture or repeatedly adding, add portion water earlier, reduce base-material viscosity, so that the pulverulent material that the enough wetting back of energy adds reduces the shared volume of powder, thereby increases total add-on of material, after adding, pulverulent material adds portion water again, preliminary denseness of regulating material avoids appearance too thick or too rare, so that follow-up pre-mixing and grinding scatter operation are carried out smoothly;
(3) prepare various materials, adopt the ball mill middling speed to carry out pre-mixing, stirring velocity strengthens earlier gradually, reduces after being added to fair speed again, splashes to prevent material, keeps middling speed to stir for some time then, and rotating speed is 1000r/min, and the pre-mixing time is 0.4h;
(4) adopt ball mill grinding to disperse sample, dispersion medium is an aluminium sesquioxide, and it is 1.5: 1～2: 1 with the mass ratio of material, grinding at a high speed, and rotating speed is 3500r/min, the time is 1.8h;
(5) grind to disperse latter stage, middling speed stirs and adds remainder water and defoamer down, and expansible black lead, stirring at low speed again, and rotating speed is 500r/min, the time is 0.7h, makes coating have suitable viscosity and satisfactory stability;
(6) filter grinding scattered coating, obtain water super-thin steel structure fire-proof paint of the present invention.
Embodiment 3
ACRYLIC EMULSION 26.7%, ammonium polyphosphate 12.5%, tetramethylolmethane 13.2%, trimeric cyanamide 4.5%, expansible black lead 2.0%, aluminium hydroxide 8.0%, defoamer 0.3%, flow agent 0.22%, dispersion agent 0.27%, softening agent 2.3%, coupling agent 0.12% adds water to 100% at last.
The preparation method of this embodiment is:
(1) earlier with pulverulent material, grind by shredder, cross 200 mesh sieves;
(2) accurately take by weighing various materials successively by prescription, add ACRYLIC EMULSION earlier, add ammonium polyphosphate then, tetramethylolmethane, trimeric cyanamide, aluminium hydroxide, add flow agent again, dispersion agent, softening agent, auxiliary agents such as coupling agent and part defoamer (account for defoamer total amount 1/2), twice adding of moisture, add portion water earlier, reduce base-material viscosity, so that the pulverulent material that the enough wetting back of energy adds reduces the shared volume of powder, thereby increases total add-on of material, after adding, pulverulent material adds portion water again, preliminary denseness of regulating material avoids appearance too thick or too rare, so that follow-up pre-mixing and grinding scatter operation are carried out smoothly;
(3) prepare various materials, adopt the ball mill middling speed to carry out pre-mixing, stirring velocity strengthens earlier gradually, reduces after being added to fair speed again, splashes to prevent material, keeps middling speed to stir for some time then, and rotating speed is 1100r/min, and the pre-mixing time is 0.3h;
(4) adopt ball mill grinding to disperse sample, dispersion medium is an aluminium sesquioxide, and it is 1.5: 1～2: 1 with the mass ratio of material, grinding at a high speed, and rotating speed is 2500r/min, the time is 2.5h;
(5) grind to disperse latter stage, middling speed stirs and adds remainder water and defoamer down, and expansible black lead, stirring at low speed again, and rotating speed is 700r/min, the time is 2.5h, makes coating have suitable viscosity and satisfactory stability;
(6) filter grinding scattered coating, obtain water super-thin steel structure fire-proof paint of the present invention.
It is as follows to detect index and detection method:
| Performance index | Detected result | |||
| Embodiment 1 | Embodiment 2 | Embodiment 3 | ||
| State in container | Uniform and smooth, nothing caking | Uniform and smooth, nothing caking | Uniform and smooth, nothing caking | |
| Time of drying (surface drying)/h | ＜4 | ＜3.5 | ＜3.5 | |
| Paint film appearance and color | After light grey, coating was dry, outward appearance was compared no significant difference with color with sample | After light grey, coating was dry, outward appearance was compared no significant difference with color with sample | After light grey, coating was dry, outward appearance was compared no significant difference with color with sample | |
| Dry splitting resistance of initial stage | Crackle does not appear | Crackle does not appear | Crackle does not appear | |
| Bonding strength (MPa) | 0.37 | 0.37 | 0.36 | |
| Water tolerance/h | The 36h coating does not have aliquation, foaming, obscission | The 36h coating does not have aliquation, foaming, obscission | The 36h coating does not have aliquation, foaming, obscission | |
| The cold-resistant heat property followed/time | 15 coatings do not have cracking, the phenomenon of peeling off, bubble | 15 coatings do not have cracking, the phenomenon of peeling off, bubble | 15 coatings do not have cracking, the phenomenon of peeling off, bubble | |
| Fire performance | Applied thickness/mm | 2.02 | 1.91 | 2.05 |
| Fire endurance/mim | 63.3 | 64.4 | 65.2 | |
Have by the prepared frie retardant coating of above-mentioned coating prescription that excellent performance, starting material are easy to get, characteristics such as cost is low, environmentally safe, be subjected to form uniform and stable expansion charring layer behind the fire, thereby steel and iron member is played a protective role, simultaneously.This coating fast drying, easy construction, and characteristics such as manufacture craft is simple, convenience.
Claims (8)
1, a kind of water super-thin steel structure fire-proof paint is characterized in that its mass percent is composed as follows:
ACRYLIC EMULSION 26.0%～33.0%, ammonium polyphosphate 12.0%～16.0%, tetramethylolmethane 4.8%～13.2%, trimeric cyanamide 2.0%～5.0%, expansible black lead 2.0%～5.0%, aluminium hydroxide 8.0%～12.0%, defoamer accounts for 0.20%～0.50%, and flow agent accounts for 0.20%～0.30%, dispersion agent accounts for 0.20%～0.40%, softening agent accounts for 2.0%～3.0%, and coupling agent accounts for 0.1%～0.2%, adds water to 100% then.
2, according to claims 1 described a kind of water super-thin steel structure fire-proof paint, it is characterized in that ACRYLIC EMULSION 32.5%, ammonium polyphosphate 15.4%, tetramethylolmethane 4.8%, trimeric cyanamide 3.2%, expansible black lead 4.8%, aluminium hydroxide 11.8%, defoamer 0.40%, flow agent 0.28%, dispersion agent 0.38%, softening agent 3.0%, coupling agent 0.20% adds water to 100% at last.
3, according to claims 1 described a kind of water super-thin steel structure fire-proof paint, it is characterized in that ACRYLIC EMULSION 30.1%, ammonium polyphosphate 13.8%, tetramethylolmethane 9%, trimeric cyanamide 3.5%, expansible black lead 3.2%, aluminium hydroxide 10.3%, defoamer 0.35%, flow agent 0.25%, dispersion agent 0.32%, softening agent 2.8%, coupling agent 0.16% adds water to 100% at last.
4, according to claims 1 described a kind of water super-thin steel structure fire-proof paint, it is characterized in that ACRYLIC EMULSION 26.7%, ammonium polyphosphate 12.5%, tetramethylolmethane 13.2%, trimeric cyanamide 4.5%, expansible black lead 2.0%, aluminium hydroxide 8.0%, defoamer 0.3%, flow agent 0.22%, dispersion agent 0.27%, softening agent 2.3%, coupling agent 0.12% adds water to 100% at last.
5,, it is characterized in that the preparation method is as follows according to the preparation method of right 1 described water super-thin steel structure fire-proof paint:
(1) earlier with pulverulent material, grind by shredder, cross 200 mesh sieves;
(2) accurately take by weighing various materials successively by prescription, add ACRYLIC EMULSION earlier, add ammonium polyphosphate then, tetramethylolmethane, trimeric cyanamide, aluminium hydroxide, add flow agent again, dispersion agent, softening agent, auxiliary agents such as coupling agent and part defoamer (account for defoamer total amount 1/2～2/3), twice of moisture or repeatedly adding, add portion water earlier, reduce base-material viscosity, so that the pulverulent material that the enough wetting back of energy adds reduces the shared volume of powder, thereby increases total add-on of material, after adding, pulverulent material adds portion water again, preliminary denseness of regulating material avoids appearance too thick or too rare, so that follow-up pre-mixing and grinding scatter operation are carried out smoothly;
(3) prepare various materials, adopt the ball mill middling speed to carry out pre-mixing, stirring velocity strengthens earlier gradually, reduce again after being added to fair speed, splash, keep middling speed to stir for some time then to prevent material, rotating speed is 900r/min～1500r/min, and the pre-mixing time is 0.2h～0.5h;
(4) adopt ball mill grinding to disperse sample, dispersion medium can be aluminium sesquioxide, and it is 1.5: 1～2: 1 with the mass ratio of material, grinding at a high speed, and rotating speed is 2000r/min～4000r/min, the time is 1.5h～3h;
(5) grind to disperse latter stage, middling speed stirs and adds remainder water and defoamer down, and expansible black lead, stirring at low speed again, and rotating speed is 500r/min～800r/min, the time is 0.3h～1h, makes coating have suitable viscosity and satisfactory stability;
(6) filter grinding scattered coating, obtain water super-thin steel structure fire-proof paint of the present invention.
6, according to the preparation method of claims 5 described water super-thin steel structure fire-proof paints, it is characterized in that middling speed pre-mixing stirring for some time, its rotating speed is 1000r/min～1200r/min, the time is that 0.3h～0.4h is advisable.
7, according to the preparation method of claims 5 described water super-thin steel structure fire-proof paints, it is characterized in that grinding the dispersion rotating speed at a high speed is 2500r/min～3500r/min, the time is that 2h～2.5h is advisable.
8, according to the preparation method of claims 5 described water super-thin steel structure fire-proof paints, it is characterized in that adding for the second time that stirring at low speed speed is 500r/min～800r/min behind the defoamer, churning time is that 0.4h～0.6h is advisable.
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2007
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