CN1986715A - Fireproof tunnel paint - Google Patents
Fireproof tunnel paint Download PDFInfo
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- CN1986715A CN1986715A CN 200510062118 CN200510062118A CN1986715A CN 1986715 A CN1986715 A CN 1986715A CN 200510062118 CN200510062118 CN 200510062118 CN 200510062118 A CN200510062118 A CN 200510062118A CN 1986715 A CN1986715 A CN 1986715A
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- fire
- tunnels
- proof coating
- vermiculite
- ammonium
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Abstract
The fireproof tunnel paint consists of adhesive comprising emulsion, 528 resin, AEC expanding cement and fireproof cement in 1-3.5 weight portions; inorganic heat insulating stuffing comprising sea foam, expanded perlite, fly ash, etc in 2-6 weight portions; foaming material comprising vermiculite, ammonium dichromate, melamine, etc in 1-3 weight portions; and assistant compounding alumina, magnesium hydroxide, tin oxide, etc in 0.1-1.0 weight portion. Under the action of high temperature, the fireproof tunnel paint may be decomposed to produce non-toxic inert gas, absorb heat and form expanding surface carbonized layer, reduce heat conductance and lower the temperature raise. The fireproof tunnel paint has the features of high fire endurance, high adhesion, high water resistance, environment friendship, etc.
Description
Technical field
The present invention relates to fire retardant coating compositions, specifically a kind of fire-proof coating for tunnels.
Background technology
Quickening along with urban development, mobile and stationary population is expanded rapidly, transport development land used amount is increasing, should reduce the occupation of land of face of land road, alleviate the pressure of Urban traffic again, building tunnel traffic net (other traffic tunnel of vcehicular tunnel, railway tunnel, subway tunnel and city) has become preferable methods.According to statistics, at the bottom of calendar year 2001 China only vcehicular tunnel just have 1782, length reaches 705km, wherein the above tunnel of 3000m surpasses 22, and 5200 of railway tunnel are arranged, length reaches 2457km.Situation from countries in the world, the task of communications and transportation passage is not only being born in the tunnel, but also play fiber optic cables, power cable is the function of tap water transfer passage even, if in limited tunnel space disaster takes place, damaging tunnel structure causes and caves in or stop up, phone and internet just may interrupt, traffic may be stagnated, the urban lighting system will be destroyed, even the tap water of some places can become and cannot drink, and the various vehicles in current will have an accident, and then the life security that jeopardizes the passenger, we can say that the safety of tunnel operation has directly had influence on daily life.
Because the structure of highway and railway tunnel is generally all assembled with Steel Concrete by stone, and the main composition-calcium carbonate of stone reaches 825 ℃ in temperature and becomes calcium oxide and carbonic acid gas with regard to pyrolysis.The intensity of calcium oxide is far away not as good as lime carbonate.Its loss of strength had reached more than 50% when concrete temperature rose to 600 ℃, about 600 ℃, the yielding stress of steel generally drops to below 1/3 of steel force-at-yield under the normal temperature, during the tunnel presence of fire, temperature is generally more than 1000 ℃, the masonry in tunnel is difficult to sustain so high temperature, and the high temperature of thousands of degree burns to such an extent that the inside and outside stone in hole flies to collapse for four times, and serious local vault caves in, even vehicle is embedded in it down, and in the tunnel repair time of masonry longer, traffic main artery particularly, its indirect loss is more huge, so in the various disasters that the tunnel takes place, fire failure financial loss maximum, the rescue difficulty is the highest, and the time that cuts off traffic is the longest.
In order to solve the tunnel fire proofing problem, since the eighties in 20th century, external combustioncharacteristics to the tunnel vehicle, the performance of tunnel-liner in fire, the objectionable constituent growing amount is analyzed in the flue gas, fire-fighting and rescue method and strategy, particularly psychology and the behavior of navigating mate in the tunnel, the tunnel fire hazard numerical simulation, ventilation emulation, the assessment of lining cutting reliable bearing capacity, the temperature field boundary distributes in the tunnel, big quantity research and exploration have been done in the research of CO concentration limiting design value, water fire prevention application and the aspects such as the origin cause of formation that takes place of tunnel fire hazard accident and prevention in the tunnel.But from practical application, adopt one of the simplest really and efficient ways of fire retardant material in the constructing tunnel.
Fire-proof coating for tunnels is to avoid scaling loss and custom-designed a kind of special fireproof material in fire at tunnel wall and vault specially, and it can improve the fire endurance of tunnel masonry, is applied to the combustible material surface, can make it satisfy the flame retardant resistance requirement.
Summary of the invention
The object of the present invention is to provide the fire-proof coating for tunnels of a kind of fire endurance height, water-tolerant, environmental protection.
The technical scheme that realizes the object of the invention is such: it adopts with acrylic emulsion, 582 resins, AEC expansive cement, refractory cements is binding agent, sepiolite, pearlstone, flyash, light calcium carbonate, aluminum silicate fiber are inorganic thermal insulating filling, vermiculite, ammonium dichromate, trimeric cyanamide, tetramethylolmethane, ammonium polyphosphate are foam material, aluminum oxide, magnesium hydroxide, stannic oxide, ammonium borate are auxiliary agent, and four compositions divide with weight ratio 1-3.5: 2-6: 1-3: 0.1-1.0 is formulated.
The better combination of over-all properties can be a binding agent for the AEC expansive cement, the mixture of pearlstone and flyash is inorganic thermal insulating filling, the mixture of trimeric cyanamide, tetramethylolmethane, ammonium polyphosphate and vermiculite or ammonium dichromate is a foam material, and magnesium hydroxide, stannic oxide are the formulated in combination of auxiliary agent.
The weight ratio of pearlstone and flyash preferably can be 2.5: 3 in the inorganic thermal insulating filling of mixture.
The weight ratio of trimeric cyanamide, tetramethylolmethane, ammonium polyphosphate and vermiculite or ammonium dichromate can be 3: 2: 2 in the mixture foam material: 6: 1.
The weight ratio of binding agent, inorganic thermal insulating filling, foam material, auxiliary agent can be 2: 5.5: 2: 0.5.
Fire-proof coating for tunnels of the present invention, composition that it adopted and stone material, concrete bonding is fine and close, after being subjected to high temperature action, self can decomposite some nontoxic rare gas elementes, can destroy the incendiary prerequisite forms, each hydrate is met dehydration vaporization of heat back and heat-sink material decomposes in burning, phase transformation all can absorb, consume a large amount of heats, can occur one deck fused film after coating is heated and form uniform carburization zone gradually and then the foaming layer of formation expansible, thereby reduce the conduction of heat, reduce the speed that member temperature raises greatly, improved the refractory ability of member.Have that fire endurance height, cohesiveness are higher, water-tolerant, do not produce characteristics such as toxic gas, environmental protection.
Fire-proof coating for tunnels mainly reaches following technical indicator:
1, tails over rate, %≤1.0
2, dry density, kg/m
3≤ 600
3, water tolerance, h 〉=24, coating does not ftracture, aliquation, come off
4, alkali resistance, h 〉=24, coating does not ftracture, aliquation, come off
5, cohesive strength, MPa concrete 〉=0.1MPa
6, cold-resistant thermal cycling test, 25 times, do not ftracture, do not come off
7, ultimate compression strength, Mpa 〉=0.3
8, flue gas toxity AQ-1 level
Thickness 9mm 12mm
9, fire performance
Fire endurance 〉=2.0h 〉=3.0h
Embodiment
The present invention is further illustrated below in conjunction with embodiment, and following each embodiment only is used to illustrate technical scheme of the present invention, but to not restriction of the present invention.
Embodiment one
A kind of fire-proof coating for tunnels of the present invention is by AEC expansive cement 200kg, pearlstone 250kg, flyash 300kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, magnesium hydroxide 50kg are mixed with, method for making is earlier pearlstone to be mixed with flyash, add magnesium hydroxide then and mix thoroughly at a high speed, add the AEC expansive cement again and get final product.
Embodiment two
A kind of fire-proof coating for tunnels of the present invention is by AEC expansive cement 200kg, pearlstone 250kg, flyash 300kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, stannic oxide 50kg are mixed with, method for making is earlier pearlstone to be mixed with flyash, add stannic oxide then and mix thoroughly at a high speed, add the AEC expansive cement again and get final product.
Embodiment three
A kind of fire-proof coating for tunnels of the present invention is by refractory cements 200kg, pearlstone 250kg, flyash 300kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, stannic oxide 50kg are mixed with.
Embodiment four
A kind of fire-proof coating for tunnels of the present invention is by refractory cements 200kg, pearlstone 250kg, flyash 300kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, magnesium hydroxide 50kg are mixed with.
Embodiment five
A kind of fire-proof coating for tunnels of the present invention is by acrylic emulsion 200kg, pearlstone 250kg, flyash 300kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, magnesium hydroxide 50kg are mixed with.
Embodiment six
A kind of fire-proof coating for tunnels of the present invention is by acrylic emulsion 200kg, light calcium carbonate 550kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, stannic oxide 50kg are mixed with.
Embodiment seven
A kind of fire-proof coating for tunnels of the present invention is by 582 resin 200kg, aluminum silicate fiber 550kg,, trimeric cyanamide 42.86kg, tetramethylolmethane 28.57kg, ammonium polyphosphate 28.57kg, vermiculite 85.71kg, ammonium dichromate 14.29kg, ammonium dichromate 50kg are mixed with.
Embodiment eight
A kind of fire-proof coating for tunnels of the present invention is by AEC expansive cement 100kg, pearlstone 273kg, flyash 327kg,, trimeric cyanamide 21.4kg, tetramethylolmethane 14.3kg, ammonium polyphosphate 14.3kg, vermiculite 42.9kg, ammonium dichromate 7.1kg, magnesium hydroxide 10kg are mixed with.
Embodiment nine
A kind of fire-proof coating for tunnels of the present invention is by refractory cements 350kg, pearlstone 250kg, flyash 300kg,, trimeric cyanamide 64.2kg, tetramethylolmethane 42.9kg, ammonium polyphosphate 42.9kg, vermiculite 128.6kg, ammonium dichromate 21.4kg, stannic oxide 100kg are mixed with.
Embodiment ten
A kind of fire-proof coating for tunnels of the present invention is by acrylic emulsion 300kg, light calcium carbonate 400kg,, trimeric cyanamide 42.8kg, tetramethylolmethane 28.6kg, ammonium polyphosphate 28.6kg, vermiculite 85.71kg, ammonium dichromate 14.3kg, stannic oxide 80kg are mixed with.
Embodiment 11
A kind of fire-proof coating for tunnels of the present invention is by 582 resin 300kg, aluminum silicate fiber 300kg,, trimeric cyanamide 53.6kg, tetramethylolmethane 35.7kg, ammonium polyphosphate 35.7kg, vermiculite 107.11kg, ammonium dichromate 17.9kg, magnesium hydroxide 100kg are mixed with.
Embodiment 12
A kind of fire-proof coating for tunnels of the present invention is by AEC expansive cement 150kg, light calcium carbonate 500kg,, trimeric cyanamide 32.2kg, tetramethylolmethane 21.47kg, ammonium polyphosphate 21.47kg, vermiculite 64.3kg, ammonium dichromate 10.7kg, stannic oxide 40kg are mixed with.
The prepared finished product of the foregoing description all can reach following enterprise's internal control quality index after tested:
Tail over rate, %≤1.0
Dry density, kg/m
3≤ 600
Water tolerance, h 〉=24, coating does not ftracture, aliquation, come off
Alkali resistance, h 〉=24, coating does not ftracture, aliquation, come off
Cohesive strength, MPa concrete 〉=0.1MPa
Cold-resistant thermal cycling test, 25 times, do not ftracture, do not come off
Ultimate compression strength, Mpa 〉=0.3
Flue gas toxity AQ-1 level
Thickness 9mm 12mm
Fire performance
Fire endurance 〉=2.0h 〉=3.0h
The part test result is as follows:
| Test number | Adhesive A kg | Compounded mix B kg | Foam material kg | Auxiliary agent kg | Fire endurance kg | Adhesive property kg | |
| 1 | 50(1) | 40(1) | 5(1) | 10(1) | 135 | 0.18 | |
| 2 | 50(1) | 50(1) | 15(2) | 20(2) | 192 | 0.08 | |
| 3 | 50(1) | 60(1) | 25(3) | 30(3) | 218 | 0.02 | |
| 4 | 60(1) | 40(1) | 15(2) | 30(3) | 185 | 0.12 | |
| 5 | 60(1) | 50(1) | 25(3) | 10(1) | 195 | 0.11 | |
| 6 | 60(1) | 60(1) | 5(1) | 20(2) | 160 | 0.08 | |
| 7 | 70(1) | 40(1) | 25(3) | 20(2) | 181 | 0.17 | |
| 8 | 70(1) | 50(1) | 5(1) | 30(3) | 147 | 0.16 | |
| 9 | 70(1) | 60(1) | 15(2) | 10(1) | 165 | 0.16 | |
| Fire endurance | K1 | 182 | 167 | 147 | 165 | ||
| K2 | 180 | 178 | 181 | 178 | |||
| K3 | 164 | 181 | 198 | 183 | |||
| K4 | 18 | 14 | 51 | 18 | |||
| Bonding strength | K1 | 0.093 | 0.157 | 0.140 | 0.150 | ||
| K2 | 0.103 | 0.117 | 0.120 | 0.110 | |||
| K3 | 0.163 | 0.087 | 0.100 | 0.100 | |||
| K4 | 0.070 | 0.070 | 0.040 | 0.050 | |||
Illustrate: 1, coat-thickness is 13mm, and maintenance is 28 days under the normal temperature.2, " fire endurance " of experimental determination refers to heat up by the standard heating curve, and steel plate is carried on the back fiery temperature and reached 250 ℃ of required times.
Its fireproofing mechanism shows the following aspects:
(1) vaporization absorbs a large amount of heats thereby the chance of the silicates hydrated product in frie retardant coating heat is dewatered, heat-sink material in the coating is because of decomposes or phase transformation simultaneously, also consume certain heat, thereby reduce the speed that member temperature raises, improved the refractory ability of member.
(2) after frie retardant coating was subjected to high temperature action, self can decomposite some rare gas elementes, and they have destroyed the formation of burning prerequisite.
(3) occur one deck fused film after coating is heated and form uniform carburization zone gradually and then the foaming layer of formation expansible.Its swell increment is 100-200 times of coating, and minimizing is 1000-2000 times before the comparable expansion of heat conduction amount of the back coating that expands.
2, the physics of steel, mechanical property under the high temperature
At high temperature the mechanical property of steel significantly descends, and this is because the cause of steel construction fire performance difference.When carrying out the fire prevention design calculation of steel construction and member, all adopt standard heating curve ISO-834 (see figure 1) abroad, its expression formula is as follows:
T-T
034510g(8t+1)
Flame temperature in the formula during T-t, ℃;
T
0Envrionment temperature during-on-test, ℃;
The time of T-test experience, min.
By the fire-resistant heating curve of standard, can be in the hope of the fire resistance rating of steel.According to the existing testing data of research, we can be in the hope of steel physics, mechanical property at high temperature.The fire endurance that does not add the naked steel construction of protection is about 15min.When temperature reached 250 ℃, steel tensile strength improved, and plasticity and impelling strength reduce, and " blue shortness " phenomenon occurred; When temperature reached 300 ℃, Young's modulus, the elastic limit of steel sharply reduced, and yield point elongation disappears; When temperature reached 400 ℃, the yielding stress of steel began rapid decline; When temperature reached 600 ℃, the yielding stress of material and ultimate stress dropped to steel yielding stress and below 1/3 of ultimate stress under the normal temperature, and at this moment, structure goes to pot.
3, the fire performance of cement stone
The concrete that cement is made at high temperature can crack with strength loss and destroy.Be concrete intensity and temperature relation (see figure 1) under the high temperature below.
Temperature below 300 ℃ as shown in Figure 1, concrete strength changes little.When temperature was higher than 300 ℃, concrete intensity raise along with temperature and reduces.When temperature is raised to 600 ℃ of left and right sides, concrete strength degradation about 50%.Because temperature raises, the variation of cement stone and generation physical changes such as it gathers materials and chemistry, change has taken place in its volume.Cement stone is heated the initial stage, and free water and combination water begin to deviate from, and thermal expansion takes place simultaneously.When temperature rises to about 200 ℃, hydrated silicate colloidal crystal water begins to deviate from, and the contraction of cement stone further enlarges, and when temperature rises to about 400 ℃, hydronium(ion) oxidation calcium begins dehydration, thereby makes concrete contraction aggravation.These change the intensity that all can diminish cement stone.In cement products, want to improve concrete fire resistance rating, be the intensity of retaining member in fire as much as possible.Therefore for improving the fire resistance rating of cement, should manage to protect concrete structure, stop extraneous heat as much as possible to the concrete product transmission.Smear the requirement of shelter that fire-proof coating for tunnels of the present invention just can reach this respect on the surface of concrete product.
Claims (5)
1, a kind of fire-proof coating for tunnels, it is characterized in that: it is to be binding agent by acrylic emulsion, 582 resins, AEC expansive cement, refractory cements, sepiolite, pearlstone, flyash, light calcium carbonate, aluminum silicate fiber are that the mixture of inorganic thermal insulating filling, trimeric cyanamide, tetramethylolmethane, ammonium polyphosphate and vermiculite or ammonium dichromate is foam material, aluminium hydroxide, and magnesium hydroxide, stannic oxide, ammonium borate are that auxiliary agent is 1-3.5: 2-6: 1-3 with the weight ratio: 0.1-1.0 is formulated.
2, fire-proof coating for tunnels as claimed in claim 1, it is characterized in that: described binding agent is the AEC expansive cement, inorganic thermal insulating filling is the mixture of pearlstone and flyash, foam material is the mixture of trimeric cyanamide, tetramethylolmethane, ammonium polyphosphate and vermiculite or ammonium dichromate, and auxiliary agent is magnesium hydroxide, stannic oxide.
3, fire-proof coating for tunnels as claimed in claim 2 is characterized in that: the weight ratio of pearlstone and flyash is 2.5: 3 in the inorganic thermal insulating filling of mixture.
4, fire-proof coating for tunnels as claimed in claim 3 is characterized in that: the weight ratio of trimeric cyanamide, tetramethylolmethane, ammonium polyphosphate and vermiculite or ammonium dichromate is 3: 2: 2 in the mixture foam material: 6: 1.
5, fire-proof coating for tunnels as claimed in claim 4 is characterized in that: the weight ratio of binding agent, inorganic thermal insulating filling, foam material, auxiliary agent is 2: 5.5: 2: 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510062118 CN1986715A (en) | 2005-12-20 | 2005-12-20 | Fireproof tunnel paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510062118 CN1986715A (en) | 2005-12-20 | 2005-12-20 | Fireproof tunnel paint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1986715A true CN1986715A (en) | 2007-06-27 |
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ID=38183657
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|---|---|---|---|
| CN 200510062118 Pending CN1986715A (en) | 2005-12-20 | 2005-12-20 | Fireproof tunnel paint |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880145A (en) * | 2010-06-13 | 2010-11-10 | 成都威邦科技有限公司 | Tunnel fire retardant coating and preparation process and construction process thereof |
| CN101497797B (en) * | 2009-02-19 | 2011-12-14 | 浙江美术地毯制造有限公司 | Environment friendly flame-retardant carpet latex and preparation technique |
| CN101723636B (en) * | 2009-12-19 | 2012-07-25 | 山西大学 | Coal mine underground coal bed waterproof paint |
| CN101759407B (en) * | 2009-12-01 | 2012-07-25 | 山西大学 | Fire retardant coating for underground coal seam of coal mine |
| CN103641497A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Seepage-resistant tunnel fireproof paint |
| CN103641421A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Environment-friendly tunnel fireproof paint |
| CN103641420A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Tunnel environment-friendly fireproof paint |
| CN103641409A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Impervious tunnel fireproof paint |
| CN103641423A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Tunnel impervious fireproof paint |
| CN106639754A (en) * | 2016-11-10 | 2017-05-10 | 重庆欧帆门业有限公司 | Wooden door manufacturing method |
| CN106833174A (en) * | 2017-01-11 | 2017-06-13 | 合肥英索莱特新材料科技有限公司 | Expansion type tunnel fire-proof paint |
| CN108640567A (en) * | 2018-05-24 | 2018-10-12 | 江蔓青 | A kind of Tunnel environment-friendlyfireproof fireproof paint |
-
2005
- 2005-12-20 CN CN 200510062118 patent/CN1986715A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497797B (en) * | 2009-02-19 | 2011-12-14 | 浙江美术地毯制造有限公司 | Environment friendly flame-retardant carpet latex and preparation technique |
| CN101759407B (en) * | 2009-12-01 | 2012-07-25 | 山西大学 | Fire retardant coating for underground coal seam of coal mine |
| CN101723636B (en) * | 2009-12-19 | 2012-07-25 | 山西大学 | Coal mine underground coal bed waterproof paint |
| CN101880145A (en) * | 2010-06-13 | 2010-11-10 | 成都威邦科技有限公司 | Tunnel fire retardant coating and preparation process and construction process thereof |
| CN101880145B (en) * | 2010-06-13 | 2012-11-14 | 成都威邦科技有限公司 | Tunnel fire retardant coating and preparation process and construction process thereof |
| CN103641409A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Impervious tunnel fireproof paint |
| CN103641421A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Environment-friendly tunnel fireproof paint |
| CN103641420A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Tunnel environment-friendly fireproof paint |
| CN103641497A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Seepage-resistant tunnel fireproof paint |
| CN103641423A (en) * | 2013-11-26 | 2014-03-19 | 江苏博思源防火材料科技有限公司 | Tunnel impervious fireproof paint |
| CN103641420B (en) * | 2013-11-26 | 2015-08-26 | 江苏博思源防火材料科技有限公司 | A kind of Tunnel environment-friendlyfireproof fireproof paint |
| CN103641421B (en) * | 2013-11-26 | 2015-10-14 | 江苏博思源防火材料科技有限公司 | A kind of Environment-friendlytunnel tunnel fireproof paint |
| CN103641409B (en) * | 2013-11-26 | 2015-10-14 | 江苏博思源防火材料科技有限公司 | A kind of anti-permeability type tunnel fireproof paint |
| CN103641423B (en) * | 2013-11-26 | 2015-12-09 | 江苏博思源防火材料科技有限公司 | The impervious frie retardant coating in a kind of tunnel |
| CN106639754A (en) * | 2016-11-10 | 2017-05-10 | 重庆欧帆门业有限公司 | Wooden door manufacturing method |
| CN106639754B (en) * | 2016-11-10 | 2018-06-19 | 重庆欧帆门业有限公司 | The production method of timber |
| CN106833174A (en) * | 2017-01-11 | 2017-06-13 | 合肥英索莱特新材料科技有限公司 | Expansion type tunnel fire-proof paint |
| CN108640567A (en) * | 2018-05-24 | 2018-10-12 | 江蔓青 | A kind of Tunnel environment-friendlyfireproof fireproof paint |
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Open date: 20070627 |