CN109735179B - Fireproof coating interface agent and preparation method thereof - Google Patents
Fireproof coating interface agent and preparation method thereof Download PDFInfo
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- CN109735179B CN109735179B CN201910033706.0A CN201910033706A CN109735179B CN 109735179 B CN109735179 B CN 109735179B CN 201910033706 A CN201910033706 A CN 201910033706A CN 109735179 B CN109735179 B CN 109735179B
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Abstract
The invention discloses a fire-retardant coating interface agent and a preparation method thereof, and relates to the technical field of building fire-retardant coatings. The technical key points are as follows: the fireproof coating interface agent comprises the following components in parts by weight: 30-40 parts of perlite; 480 portions of vermiculite powder and 520 portions of vermiculite powder; floating bead 180 and 220; 400 portions and 450 portions of fly ash; 350 portions of light calcium carbonate 310-; 280-320 parts of vinyl acetate-ethylene copolymer emulsion; 80-120 parts of polyvinyl alcohol; 8-12 parts of wood fiber; 2-4 parts of an aqueous thickening agent; 70-90 parts of talcum powder; water 900-. The invention has the advantages of high bonding strength and difficult occurrence of hollowing and cracking.
Description
Technical Field
The invention relates to the technical field of building coatings, in particular to a fireproof coating interface agent and a preparation method thereof.
Background
The fire-proof paint is a special paint which is used on the surface of flammable base material, can reduce the flammability of the surface of the material to be painted, can retard the rapid spread of fire and is used for improving the fire endurance of the material to be painted. The fire retardant is applied to the surface of a flammable base material to change the burning characteristics of the surface of the material and retard the rapid spread of fire; or special coatings applied to building components to increase the fire endurance of the component.
The invention discloses a steel structure fireproof coating in a Chinese patent with the publication number of CN104789068A, which comprises the following components in parts by weight: 30-40 parts of film forming base material, 2-5 parts of auxiliary base material, 2-5 parts of combustion improver, 20-30 parts of foaming agent, 5-10 parts of stabilizer, 10-15 parts of functional pigment and filler, 5-10 parts of solvent, 0.5-1 part of dispersant and 0.5-1 part of defoamer.
The fire-retardant coating in the patent is directly coated on the surface of a steel structure, and can cause the phenomena of expansion with heat, contraction with cold and the like under the conditions of four seasons alternation, great temperature difference of sun, rain and the like, thereby causing the hollowing phenomenon to occur under the action of different stresses of a steel member and a fire-retardant layer, and causing the coating to be easily peeled off.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the fireproof coating interface agent which has the advantages of high bonding strength and difficulty in causing hollowing and cracking.
The second purpose of the invention is to provide a preparation method of the fireproof coating interface agent, which has the advantages of high bonding strength and difficulty in causing hollowing and cracking.
In order to achieve the first purpose, the invention provides the following technical scheme:
the fireproof coating interface agent comprises the following components in parts by weight:
30-40 parts of perlite;
480 portions of vermiculite powder and 520 portions of vermiculite powder;
floating bead 180 and 220;
400 portions and 450 portions of fly ash;
350 portions of light calcium carbonate 310-;
280-320 parts of vinyl acetate-ethylene copolymer emulsion;
80-120 parts of polyvinyl alcohol;
8-12 parts of wood fiber;
2-4 parts of an aqueous thickening agent;
70-90 parts of talcum powder;
water 900-.
By adopting the technical scheme, the perlite has the advantages of light apparent density, low heat conductivity coefficient, good chemical stability, wide use temperature range and small moisture absorption capacity, and is nontoxic, tasteless, fireproof and sound-absorbing. The vermiculite powder has acid and alkali corrosion resistance and has better corrosion resistance to sodium carbonate. The vermiculite powder also has the characteristics of porosity, light weight and high melting point, and is an excellent refractory and heat-insulating material. The vermiculite powder has good anti-freezing performance, and the capacity and the strength of the vermiculite powder are not changed through 40 times of freeze-thaw cycle experiments at the temperature of-20 ℃.
Floating beads, unlike irregularly shaped particles, roll easily between each other. This results in a system using floating beads with lower viscosity, better fluidity and improved sprayability of the interfacial agent. The floating bead is a high-strength and hard microsphere which can enhance the hardness, the scrubbing resistance and the wear resistance of the interfacial agent; due to the hollow sphere structure of the floating bead, the floating bead has excellent heat insulation effect when being filled in the coating.
The fly ash and the light calcium carbonate are used as fillers, the water-based thickener is used for adjusting viscosity, and is selected from any one of cellulose ether and derivatives thereof, alkali-soluble expansion type thickener, polyurethane thickener and inorganic thickener. The talcum powder has excellent physical and chemical properties such as lubricity, anti-sticking property, flow aid property, fire resistance, acid resistance, insulativity, high melting point, chemical inactiveness, good covering power, softness, good luster, strong adsorption power and the like. In the coating, the talcum powder is used as a filler, so that the function of a framework can be achieved, the manufacturing cost is reduced, and the film hardness of the interface agent is improved. The talc powder can mainly increase the stability of the shape of a product, increase the tensile strength, the shear strength, the flexural strength and the pressure strength, reduce the deformation, the elongation and the thermal expansion coefficient, and has the most important characteristics of high fire resistance, acid resistance, insulation, high melting point and the like. After the talcum powder is modified, the ignition point of the interface agent can be obviously improved, and the ignition point of the interface agent is improved to be more than 300 ℃.
The vinyl acetate-ethylene copolymer emulsion and the polyvinyl alcohol are used as an adhesive to bond the filler and the particles together, and the polyvinyl alcohol also has good film forming property to form a bonding layer with strong bonding strength.
The wood fiber is organic flocculent fiber substance obtained by chemical treatment and mechanical processing of natural renewable wood, and the moisture in the system is rapidly transmitted to the surface and interface of the coating due to the capillary action of the structure of the wood fiber, so that the moisture in the coating is uniformly distributed, the skinning phenomenon is obviously reduced, the bonding strength and the surface strength are obviously improved, and the tensile force is reduced in the drying process, so that the anti-cracking effect is obviously achieved. The wood fiber has good thermal insulation and crack resistance due to the dimensional stability and the thermal stability.
Further preferably, the wood fiber is subjected to surface modification treatment, and the wood fiber comprises a fiber body and an acid corrosion resistant coating sprayed on the surface of the fiber body.
By adopting the technical scheme, the pH of the interface agent is acidic, and the wood fiber is organic fiber, so that the wood fiber is inevitably influenced by corrosion in an acidic material to reduce the effect, and after the acid corrosion resistant coating is sprayed, the acid resistance of the wood fiber can be obviously improved, and the bonding strength and the crack resistance are improved.
Further preferably, the acid corrosion resistant coating comprises the following components in parts by weight:
10-50 parts of polytetrahydrofuran diol;
2-8 parts of isocyanate;
0.5-2 parts of polydimethylsiloxane;
0.5-2 parts of glycerin monostearate;
0.1-2 parts of silicon dioxide;
10-20 parts of dimethylbenzene.
By adopting the technical scheme, the polytetrahydrofuran diol reacts with isocyanate to generate polyurethane, and the polyurethane has excellent low temperature resistance, water resistance, oil resistance, wear resistance, mildew resistance and other properties. Polydimethylsiloxane plays a small-shot role, glyceryl monostearate plays a dispersing role, silicon dioxide is used as a filler, and xylene is used as a solvent.
Further preferably, the acid corrosion resistant coating further comprises 6-10 parts by weight of ammonium polyphosphate.
By adopting the technical scheme, the acid corrosion resistant coating has fireproof performance due to the addition of the ammonium polyphosphate.
More preferably, the thickness of the acid corrosion resistant coating is 20-30 μm.
By adopting the technical scheme, the acid corrosion resistant coating is too thin, the acid corrosion resistant performance is too poor, the acid corrosion resistant coating is too thick, and the wood fiber cannot play a role in cracking resistance.
More preferably, the wood fiber surface modification treatment step is as follows:
s1, adding polytetrahydrofuran diol, isocyanate, polydimethylsiloxane, glycerin monostearate, silicon dioxide and xylene into a container, and mixing and stirring uniformly;
s2, adding the fiber body into the container, mixing and stirring uniformly, and sending the mixture to a crusher for crushing after solidification to obtain powder;
and S3, screening, and removing powder and large particles to obtain the wood fiber.
By adopting the technical scheme, the wood fiber can be wrapped in the acid corrosion resistant coating, so that the bonding strength and the crack resistance of the interface agent are improved.
More preferably, the S3 specifically includes the following steps: freezing the powder material at-10 deg.C for 10-30min, sieving, and removing powder and large particles to obtain wood fiber.
By adopting the technical scheme, after the crushed powder is subjected to quick freezing treatment, on one hand, the acid corrosion resistant coating is rapidly shrunk and is bonded with the surface of the wood fiber more tightly, on the other hand, the burr part on the surface of the powder is embrittled before the inner part of the coating under the low-temperature condition, and in the screening process, the powder is collided and rubbed with each other to remove burrs generated in the crushing process.
In order to achieve the second purpose, the invention provides the following technical scheme:
a method for preparing the fire retardant coating interface agent as described in the first object, which is characterized by comprising the following steps:
step one, adding water into a container, then adding perlite, vermiculite powder, light calcium carbonate, fly ash and floating beads, uniformly stirring, and keeping stirring in the feeding process;
step two, putting the vinyl acetate-ethylene copolymer emulsion and polyvinyl alcohol into a container, and uniformly stirring;
and step three, adding the thickening agent into the container, uniformly stirring, and discharging to obtain the fireproof coating interface agent.
By adopting the technical scheme, the viscous and granular fire retardant coating interface agent is prepared, can be brushed, sprayed or rolled on the surface of the steel structure antirust primer, and then is sprayed with the fire retardant coating, so that the bonding strength of the fire retardant coating and the antirust primer can be obviously improved, and the phenomenon of hollowing and cracking is not easy to occur.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts vinyl acetate-ethylene copolymer emulsion and polyvinyl alcohol as adhesive, the filler and the particles are bonded together, the polyvinyl alcohol also has good film forming property, a bonding layer with strong bonding strength is formed, the wood fiber further improves the bonding strength and the surface strength, and plays a good role in heat preservation and crack resistance;
(2) the acid corrosion resistant coating is sprayed on the surface of the wood fiber, so that the acid resistance of the wood fiber can be obviously improved, and the bonding strength and the crack resistance are improved.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1: the fireproof coating interface agent comprises the following components in parts by weight as shown in Table 1, and is prepared by the following steps:
step one, adding water into a container, then adding perlite, vermiculite powder, light calcium carbonate, fly ash and floating beads, uniformly stirring, and keeping stirring in the feeding process at a stirring speed of 200 rpm;
step two, putting the vinyl acetate-ethylene copolymer emulsion and polyvinyl alcohol into a container, and stirring for 1.5 hours;
and step three, adding the thickening agent into the container, stirring for 10 minutes, and discharging to obtain the fireproof coating interface agent.
The aqueous thickener is hydroxypropyl methylcellulose.
Examples 2 to 5: a fireproof coating interface agent is different from the fireproof coating interface agent in example 1 in that the components and the corresponding parts by weight are shown in Table 1.
TABLE 1 Components and parts by weight of examples 1-5
Example 6: a fire-retardant coating interfacial agent is different from the embodiment 1 in that wood fiber is subjected to surface modification treatment, the wood fiber comprises a fiber body and an acid corrosion resistant coating sprayed on the surface of the fiber body, and the thickness of the acid corrosion resistant coating is 20 microns;
the acid corrosion resistant coating comprises the following components in parts by weight:
10 parts of polytetrahydrofuran glycol;
2 parts of isocyanate;
0.5 part of polydimethylsiloxane;
0.5 part of glycerin monostearate;
0.1 part of silicon dioxide;
10 parts of dimethylbenzene;
the surface modification treatment steps of the wood fiber are as follows:
s1, adding polytetrahydrofuran diol, isocyanate, polydimethylsiloxane, glycerin monostearate, silicon dioxide and xylene into a container, and mixing and stirring uniformly;
s2, adding the fiber body into the container, mixing and stirring uniformly, and sending the mixture to a crusher for crushing after solidification to obtain powder;
and S3, screening, and removing powder and large particles to obtain the wood fiber.
Example 7: the fire-retardant coating interface agent is different from the fire-retardant coating interface agent in example 6 in that the acid corrosion resistant coating comprises the following components in parts by weight:
30 parts of polytetrahydrofuran glycol;
5 parts of isocyanate;
1 part of polydimethylsiloxane;
1 part of glycerin monostearate;
1 part of silicon dioxide;
15 parts of dimethylbenzene;
the thickness of the acid corrosion resistant coating was 25 μm.
Example 8: the fire-retardant coating interface agent is different from the fire-retardant coating interface agent in example 6 in that the acid corrosion resistant coating comprises the following components in parts by weight:
50 parts of polytetrahydrofuran glycol;
8 parts of isocyanate;
2 parts of polydimethylsiloxane;
2 parts of glycerin monostearate;
2 parts of silicon dioxide;
20 parts of dimethylbenzene;
the thickness of the acid corrosion resistant coating was 30 μm.
Example 9: the fireproof coating interface agent is different from the fireproof coating interface agent in example 6 in that the acid corrosion resistant coating further comprises 6 parts by weight of ammonium polyphosphate.
Example 10: the fireproof coating interface agent is different from the fireproof coating interface agent in example 6 in that the acid corrosion resistant coating further comprises 8 parts by weight of ammonium polyphosphate.
Example 11: the fireproof coating interface agent is different from the fireproof coating interface agent in example 6 in that the acid corrosion resistant coating further comprises 10 parts by weight of ammonium polyphosphate.
Example 12: the fire retardant coating interface agent is different from the fire retardant coating interface agent in embodiment 6 in that S3 specifically comprises the following steps: freezing the powder material at-10 deg.C for 10min, sieving, and removing powder and large particles to obtain wood fiber.
Example 13: the fire retardant coating interface agent is different from the fire retardant coating interface agent in embodiment 6 in that S3 specifically comprises the following steps: freezing the powder material at-10 deg.C for 20min, sieving, and removing powder and large particles to obtain wood fiber.
Example 14: the fire retardant coating interface agent is different from the fire retardant coating interface agent in embodiment 6 in that S3 specifically comprises the following steps: freezing the powder material at-10 deg.C for 30min, sieving, and removing powder and large particles to obtain wood fiber.
Comparative example 1: a fire retardant coating interfacial agent is different from the fire retardant coating interfacial agent in example 1 in that wood fiber is not added.
Comparative example 2: a fire retardant coating interfacial agent is different from that of example 1 in that polyvinyl alcohol is not added.
Comparative example 3: a fire retardant coating interfacial agent is different from the fire retardant coating interfacial agent in example 1 in that a vinyl acetate-ethylene copolymer emulsion is not added.
Comparative example 4: a fire retardant coating interfacial agent is different from that of example 1 in that wood fiber and polyvinyl alcohol are not added.
Comparative example 5: a fire retardant coating interfacial agent is different from the fire retardant coating interfacial agent in example 1 in that wood fiber and vinyl acetate-ethylene copolymer emulsion are not added.
Comparative example 6: a fire retardant coating interfacial agent is different from the fire retardant coating interfacial agent in example 1 in that wood fiber, polyvinyl alcohol and vinyl acetate-ethylene copolymer emulsion are not added.
Performance test method: the test piece is manufactured according to GB14907-2002 steel structure fireproof paint, and the difference is that: the interface agents of the fireproof coatings in examples 1 to 14 and comparative examples 1 to 6 were sprayed on the surface of Q235 steel, and after drying, the fireproof coatings of the common steel structure were sprayed as test samples 1 to 14 and comparative samples 1 to 6. The formula of the steel structure fireproof coating selected by the invention is as follows: 250kg of perlite, 150kg of vermiculite, 100 parts of talcum powder, 100 parts of putty powder, 350kg of cement, 1 part of a leveling agent, 3306 purchased from Zhejiang Lingfu paint additive limited company, 1 part of sodium dodecyl sulfate and 5 parts of methyl cellulose, and the components are stirred and mixed uniformly.
The fire retardant coating prepared in example 1 of the chinese patent application publication No. CN104789068A was sprayed on the surface of Q235 steel as a control sample 7.
(1) After the test piece is manufactured, other performances of the test sample 1 are tested according to the standard of GB14907-2002 Steel Structure fire-retardant coating.
(2) And after the test piece is manufactured, testing the bonding strength, the heat and exposure resistance, the humidity and heat resistance and the freeze-thaw cycle resistance of the fireproof coating.
Test results and analysis: the test results of the test sample 1 are shown in Table 2, and the performance test results of the test samples 1 to 14 and the control samples 1 to 7 are shown in Table 3. As shown in tables 2 and 3, the properties of the test sample 1 all meet the requirements of the standard, after the wood fiber is subjected to surface modification treatment, the bonding strength, the exposure resistance, the humidity resistance and the freeze-thaw resistance of the test samples 6 to 8 are greatly improved, after the powder is subjected to freezing treatment, the bonding strength, the exposure resistance, the humidity resistance and the freeze-thaw resistance of the test samples 12 to 14 are greatly improved, the bonding strength of the comparison samples 4 to 7 is smaller than the standard requirement, and the exposure resistance, the humidity resistance and the freeze-thaw resistance of the comparison samples 1 to 7 do not meet the standard requirement, which indicates that the invention adopts vinyl acetate-ethylene copolymer emulsion and polyvinyl alcohol as adhesives to bond the fillers and the particles together, the polyvinyl alcohol also has good film forming property to form a bonding layer with strong bonding strength, the wood fiber further improves the bonding strength and the surface strength, and plays a good role in heat preservation and crack resistance; the acid corrosion resistant coating is sprayed on the surface of the wood fiber, so that the acid resistance of the wood fiber can be obviously improved, and the bonding strength and the crack resistance are improved.
Table 2 test results of test sample 1
TABLE 3 Performance test results of test samples 1-14 and control samples 1-7
| Sample numbering | Adhesive strength/MPa | Heat resistance/h | Humidity and heat resistance/h | Freeze-thaw durability/time |
| Test sample 1 | 0.20 | 720 | 504 | 15 |
| Test sample 2 | 0.21 | 720 | 504 | 15 |
| Test sample 3 | 0.20 | 720 | 505 | 15 |
| Test sample 4 | 0.20 | 720 | 505 | 15 |
| Test sample 5 | 0.21 | 720 | 506 | 16 |
| Test sample 6 | 0.24 | 725 | 510 | 21 |
| Test sample 7 | 0.24 | 726 | 510 | 21 |
| Test sample 8 | 0.25 | 728 | 512 | 22 |
| Test sample 9 | 0.23 | 724 | 509 | 20 |
| Test sample 10 | 0.23 | 723 | 508 | 20 |
| Test sample 11 | 0.23 | 724 | 508 | 20 |
| Test sample 12 | 0.25 | 728 | 511 | 23 |
| Test sample 13 | 0.25 | 728 | 512 | 23 |
| Test sample 14 | 0.25 | 728 | 512 | 22 |
| Control sample 1 | 0.06 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
| Control sample 2 | 0.05 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
| Control sample 3 | 0.05 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
| Control sample 4 | 0.03 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
| Control sample 5 | 0.03 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
| Control sample 6 | 0.02 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
| Control sample 7 | 0.03 | Fail to be qualified | Fail to be qualified | Fail to be qualified |
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (3)
1. The fireproof coating interface agent is characterized by comprising the following components in parts by weight:
30-40 parts of perlite;
480 portions of vermiculite powder and 520 portions of vermiculite powder;
floating bead 180 and 220;
400 portions and 450 portions of fly ash;
350 portions of light calcium carbonate 310-;
280-320 parts of vinyl acetate-ethylene copolymer emulsion;
80-120 parts of polyvinyl alcohol;
8-12 parts of wood fiber;
2-4 parts of an aqueous thickening agent;
70-90 parts of talcum powder;
water 900-;
the wood fiber is subjected to surface modification treatment to obtain the wood fiber modified by the acid corrosion resistant coating; the acid corrosion resistant coating comprises the following components in parts by weight:
10-50 parts of polytetrahydrofuran diol;
2-8 parts of isocyanate;
0.5-2 parts of polydimethylsiloxane;
0.5-2 parts of glycerin monostearate;
0.1-2 parts of silicon dioxide;
10-20 parts of dimethylbenzene;
the thickness of the acid corrosion resistant coating is 20-30 μm, and the surface modification treatment steps of the wood fiber are as follows:
s1, adding polytetrahydrofuran diol, isocyanate, polydimethylsiloxane, glycerin monostearate, silicon dioxide and xylene into a container, and mixing and stirring uniformly;
s2, adding the fiber body into the container, mixing and stirring uniformly, and sending the mixture to a crusher for crushing after solidification to obtain powder;
and S3, screening, and removing powder and large particles to obtain the wood fiber.
2. The fire retardant coating interface agent according to claim 1, wherein the acid corrosion resistant coating further comprises 6-10 parts by weight of ammonium polyphosphate.
3. The fireproof coating interface agent of claim 1, wherein S3 specifically comprises the following steps: freezing the powder material at-10 deg.C for 10-30min, sieving, and removing powder and large particles to obtain wood fiber.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481579A (en) * | 2008-12-23 | 2009-07-15 | 中国人民解放军总后勤部军需装备研究所 | Waterproof moisture permeable modified polyurethane coating glue and preparation thereof |
| CN105038422A (en) * | 2015-07-14 | 2015-11-11 | 上海森瀚新型材料科技有限公司 | Composite functional type heat insulating coating for building wall |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55160067A (en) * | 1979-05-30 | 1980-12-12 | Showa Electric Wire & Cable Co Ltd | Fireproof composition |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481579A (en) * | 2008-12-23 | 2009-07-15 | 中国人民解放军总后勤部军需装备研究所 | Waterproof moisture permeable modified polyurethane coating glue and preparation thereof |
| CN105038422A (en) * | 2015-07-14 | 2015-11-11 | 上海森瀚新型材料科技有限公司 | Composite functional type heat insulating coating for building wall |
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