CN110484119A - A kind of heat insulating coatings used for building exterior wall and preparation method thereof - Google Patents

A kind of heat insulating coatings used for building exterior wall and preparation method thereof Download PDF

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Publication number
CN110484119A
CN110484119A CN201910769063.6A CN201910769063A CN110484119A CN 110484119 A CN110484119 A CN 110484119A CN 201910769063 A CN201910769063 A CN 201910769063A CN 110484119 A CN110484119 A CN 110484119A
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parts
coating
composite aerogel
heat insulating
exterior wall
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代群
鲁荣
范红
代琴
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Maanshan Jinhan Waterproof Insulation Engineering Co Ltd
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Maanshan Jinhan Waterproof Insulation Engineering Co Ltd
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Abstract

The invention discloses a kind of heat insulating coatings used for building exterior wall, are made of following raw material: 50-60 parts of modified polyurethane, modified composite aerogel 30-36 parts, 8-12 parts of floating bead, 1.5-2 parts of rutile type titanium white, 1.5-2 parts of silicon carbide, 2-3 parts of saltcake, 0.6-1 parts of auxiliary agent；The invention also discloses the preparation methods of the coating.The present invention can greatly improve the microporosity in coating by addition composite aerogel and extend heat conduction path；In addition, the thermally conductive propagation path of radiation-inhibiting can be carried out with the rutile type titanium white and silicon carbide of reflected radiation heat by introducing, phase-changing energy storage material saltcake is introduced, insulating mold coating overall performance can be effectively improved in coating；The present invention is by the way that from three kinds of paths of heat transfer, (conduction, radiation and convection current), make coating have excellent thermal and insulating performance；Film forming matter can assign the good antibacterial and mouldproof of coating and waterproof performance, and obtained heat insulating coatings are suitable for external wall.

Description

A kind of heat insulating coatings used for building exterior wall and preparation method thereof
Technical field
The invention belongs to building coating technical fields, and in particular, to a kind of heat insulating coatings used for building exterior wall and its Preparation method.
Background technique
With the continuous quickening of urban construction paces, air-conditioning, heating system installation amount be continuously increased so that the ratio of building energy consumption Example is continuously increased, and the meaning of building energy conservation is more and more important, and the heat-insulation and heat-preservation of external wall is the important link of building energy conservation.It answers Coating for exterior wall concrete or Side fascia is exposed in atmospheric environment, by wind, solarization, the weathers such as drench with rain nature Variation, can make coating occur dusting, discoloration, peeling, spot phenomena such as and lose original decorative effect, to influence building The beauty of appearance.Also, outer wall coating, which is easy to absorb the moisture content in air the water content for leading to material surface, to be continuously increased, After humidity reaches 30% or more, the environment that can be suitable for is provided for the growth and breeding of algae, so that exterior wall mould growth and algae.
At present about the heat insulation coating of Side fascia mainly from lotion, filler, auxiliary agent screening and its mutually dispersion, it is stable Performance is improved in level, it is outer that the Chinese invention patent of Patent No. CN03118029.9 discloses a kind of multifunctional nano building Wall coating and preparation method thereof, the building external paint is with nano-titanium dioxide, nano zine oxide, nano silica, thin,tough silk cloud Female, kaolin is main functional component, and multifunctional exterior wall coating is prepared, improve ageing resistance, washability ability, The multiple performances such as antibacterial, but insulation characteristic is to be improved, while production process step is more, technique is more complex.
Summary of the invention
The purpose of the present invention is to provide a kind of heat insulating coatings used for building exterior wall and preparation method thereof, by the way that gas is added Gel can greatly improve the microporosity in coating and extend heat conduction path, and then improve the thermal and insulating performance of coating； In addition, the thermally conductive propagation road of radiation-inhibiting can be come with the material (rutile type titanium white and silicon carbide) of reflected radiation heat by introducing A kind of diameter, efficient storage substance of the phase-changing energy storage material (saltcake) of introducing as thermal energy, can effectively improve heat preservation in coating Insulating moulding coating overall performance；The present invention is by the way that from three kinds of paths of heat transfer, (conduction, radiation and convection current) have coating excellent Different thermal and insulating performance；Meanwhile the good antibacterial and mouldproof performance of coating can be assigned for the film forming matter of coating and is prevented Aqueous energy, the heat insulating coatings made are suitable for external wall.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of heat insulating coatings used for building exterior wall, are made of following raw material: 50-60 parts of modified polyurethane changes 30-36 parts of composite aerogel of property, 8-12 parts of floating bead, 1.5-2 parts of rutile type titanium white, 1.5-2 parts of silicon carbide, 2-3 parts of saltcake, 0.6-1 parts of auxiliary agent；
The coating is made by the following method:
Modified composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent are pressed Ratio is successively added in reaction kettle, after 200r/min stirs 30-40min, grinds 10-12min using high speed dispersion grinder, 3000r/min stirs 25-30min again, obtains thermal insulation coatings.
Further, the modified polyurethane is prepared by the following method:
1) aqueous solution of polyether polyol and poly (hexamethylene) hydrochloride, stirring heating are separately added into three-necked flask To 120 DEG C, vacuumizes to be dehydrated after 2h and system is down to room temperature；
2) whole system is warming up to 70-80 DEG C, methyl diphenylene diisocyanate is added dropwise into system with dropping funel, It is stirred continuously simultaneously, then trimethylolpropane, dibutyl tin dilaurate and dimethylbenzene is added successively, constant temperature stirs 1.5h Afterwards, Nano silica sol is added, continues to keep the temperature 1h, modified polyurethane is made in cooling discharge.
Further, the additional amount of the silica solution is the 12% of system quality, and polyether polyol, diphenyl methane two are different The ratio between the amount of substance of cyanate and poly (hexamethylene) acid 1:1.05:0.01.
Further, the modified composite aerogel is prepared by the following method:
It (1) is 1:9:25 by the mixing of aluminium chloride, dehydrated alcohol and deionized water according to molar ratio, 150r/min is stirred at room temperature 5h is mixed, colloidal sol is obtained, colloidal sol is removed into removing chloride by strong-base anion-exchange resin；
(2) it keeps 150r/min at the uniform velocity to stir, propylene oxide and formamide is added into colloidal sol, after adding, continues to stir 40-50min obtains gel；
(3) in 48 DEG C of drying boxes, gel is put into the ethanol solution of ethyl orthosilicate according to volume ratio 1:2 and is kept the temperature For 24 hours, product is rinsed with dehydrated alcohol and is replaced；
(4) in 65 DEG C of drying boxes, according to the volume ratio 10:2-3 product for obtaining above-mentioned steps and trimethoxy methyl The hexane solution of silane mixes, and keeps the temperature 10-12h, and after product rinses displacement with n-hexane, first 30 DEG C of dryings for 24 hours, then heat up To 60 DEG C of dry 48h, composite aerogel is obtained；
(5) in closed container, deionized water is added and dispersing agent is slowly added to composite aerogel after mixing evenly, 60r/min stirs 80-100min and forms evenly dispersed slurry to composite aerogel and water, vacuumizes and keeps continuing stirring, Until composite aerogel and the mass ratio of deionized water are 1:2.8-3, modified composite aerogel is made.
Further, the formamide and propylene oxide molar ratio being added in step (2) are 1:10, the propylene oxide of addition Quality is 12 times of aluminium chloride quality.
Further in the initial content of deionized water, dispersing agent and composite aerogel is 10:0.05 in step (5): 1.5-2。
A kind of preparation method of heat insulating coatings used for building exterior wall, includes the following steps:
Modified composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent are pressed Ratio is successively added in reaction kettle, after 200r/min stirs 30-40min, grinds 10-12min using high speed dispersion grinder, 3000r/min stirs 25-30min again, obtains thermal insulation coatings.
Beneficial effects of the present invention:
Film forming matter of the present invention by using modified polyurethane as coating, respectively with poly (hexamethylene) hydrochloride and Silica solution is modified processing to polyurethane, and poly (hexamethylene) hydrochloride is a kind of organic antibacterial agent of high-efficiency broad spectrum, sterilization Effect is rapid, and safe to the human body nontoxic；The end group of poly (hexamethylene) hydrochloride is amido, and life can be reacted with isocyanates At urea groups, graft on PU strand；On the one hand, poly (hexamethylene) hydrochloride is reacted with isocyanates generates allophanate And biuret, a large amount of hydrogen bonds are generated between urea groups and urea groups, enhance intermolecular force, so that the hardness of polyurethane increases, are drawn It is in rising trend to stretch intensity；On the other hand, it is different from that directly antibacterial mildew inhibitor being blended with coating in common mode, poly- six methylene Base guanidine hydrochloride be by being chemically bound on the strand of polyurethane so that antiseptic and mildew resistant ability have excellent persistence, And have the advantages that preparation process is more simple；In addition, carrying out blending and modifying to polyurethane using Nano silica sol, introduce Dissociation energy is big, (has preferable electric conductivity to the heat-staple functional group Si-O key of light, will not generate charge accumulated, i.e., not produce Raw electrostatic, dust are difficult to stick), and crosspolymer key is formed in emulsion polymerization process, the crosslinking that can increase coating is close Degree, makes resin become solid type structure from linear macromolecule, improves the hardness and compactness of coating, fine and close structure makes coating Weather-proof, water-fast, stain resistance enhancing；In addition, the silica solution molecule of fully reacting is not attached to external wall and filler particles Surface, with the evaporation of moisture, mSiO2·nH2Dehydration forms the solid netted skeleton of firm silicon oxygen bond between O particle, in addition poly- ammonia The activity of ester molecule chain is very strong, and the compact structure of coating can be made hard, improve the hardness, water resistant and rub resistance of coating；
Main heat-insulation and heat-preservation substance of the present invention using modified composite aerogel as coating, in plural gel preparation process In, gel is first modified using trimethoxymethylsila,e under wet gel state, silane group is the same as aeroge surface Dehydration condensation, one layer of silane group (Si-O-Si and Al-O-Si of better polycondensation on the surface of gel occur for hydroxyl group Group), SiO can be weakened2And Al2O3Crystallinity so that gel effect is good；Meanwhile the silane group of gel surface can be filled out Enhancing hole configurations is filled, the reduction in aperture has been thereby resulted in, improves the specific surface area and heat-proof quality of aeroge, and gel Polycondensation one layer of silane group in surface can effectively prevent the collapsing of aeroge normal temperature and pressure drying process Hole structure, make gas The structure of gel is more complete, and the three-dimensional net structure of composite aerogel can be maintained after dry, improves the thermal insulation of aeroge Energy；Slurried processing (mixed liquor of deionized water and dispersing agent) is carried out to composite aerogel in advance, can not only be increased compound Dispersion compatibility of the aeroge in coating, and the certain hydrophobicity of composite aerogel can be retained, and then keep compound gas Excellent thermal and insulating performance of the gel powder in coating；
Microporosity in coating can be greatly improved by addition aeroge in coating of the invention and extend heat transfer Path, and then improve the thermal and insulating performance of coating；It can be with the material (rutile type titanium white of reflected radiation heat in addition, introducing And silicon carbide) carrying out the thermally conductive propagation path of radiation-inhibiting, the phase-changing energy storage material (saltcake) of introducing is as a kind of the efficient of thermal energy Substance is stored, insulating mold coating overall performance can be effectively improved in coating；The present invention from three kinds of paths of heat transfer by (passing Lead, radiate and convection current) set out, make coating have excellent thermal and insulating performance；Meanwhile it can be assigned for the film forming matter of coating The good antibacterial and mouldproof performance of coating and waterproof performance are given, the heat insulating coatings made are suitable for external wall.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected Range.
A kind of heat insulating coatings used for building exterior wall, are made of following raw material: 50-60 parts of modified polyurethane changes 30-36 parts of composite aerogel of property, 8-12 parts of floating bead, 1.5-2 parts of rutile type titanium white, 1.5-2 parts of silicon carbide, 2-3 parts of saltcake, 0.6-1 parts of auxiliary agent；
Auxiliary agent includes coalescing agent, defoaming agent, dispersing agent；
Rutile type titanium white has the function of strength refractive power, the rutile TiO of high near infrared reflectivity2And high IR The silicon carbide of radiance, rutile TiO2There is high infrared reflection rate in near-infrared section, a part of heat, silicon carbide can be reflected With high infrared radiance, a part of heat can be emitted back in a manner of radiating, insulation work is played in the two collaboration With；
The microporosity in coating can be greatly improved by addition aeroge and extends heat conduction path, and then is improved and applied The thermal and insulating performance of material；In addition, introducing can be obstructed with the material (rutile type titanium white and silicon carbide) of reflected radiation heat Radiate thermally conductive propagation path, efficient storage substance of the phase-changing energy storage material (saltcake) as a kind of thermal energy, in coating Introducing can effectively improve insulating mold coating overall performance；The present invention by from three kinds of paths of heat transfer (conduction, radiation and it is right Stream) it sets out, make coating that there is excellent thermal and insulating performance；
The modified polyurethane is prepared by the following method:
1) aqueous solution (mass fraction of polyether polyol and poly (hexamethylene) hydrochloride is separately added into three-necked flask For 5%), stirring is warming up to 120 DEG C, vacuumizes to be dehydrated after 2h and system is down to room temperature；
2) whole system is warming up to 70-80 DEG C, methyl diphenylene diisocyanate is added dropwise into system with dropping funel, It is stirred continuously simultaneously, then trimethylolpropane, dibutyl tin dilaurate and dimethylbenzene is added successively, constant temperature stirs 1.5h Afterwards, Nano silica sol is added, continues to keep the temperature 1h, modified polyurethane is made in cooling discharge；
Wherein, the additional amount of silica solution is the 12% of system quality；Polyether polyol, methyl diphenylene diisocyanate and The ratio between the amount of substance of poly (hexamethylene) acid 1:1.05:0.01；
Poly (hexamethylene) hydrochloride is a kind of organic antibacterial agent of high-efficiency broad spectrum, and bactericidal effect is rapid, and to human body It is safe and non-toxic；The end group of poly (hexamethylene) hydrochloride is amido, can react with isocyanates and generate urea groups, graft on PU molecule On chain；On the one hand, poly (hexamethylene) hydrochloride is reacted with isocyanates generates allophanate and biuret, urea groups and urea groups Between generate a large amount of hydrogen bonds, enhance intermolecular force, so that the hardness of polyurethane increases, tensile strength is in rising trend；Separately On the one hand, it is different from that directly antibacterial mildew inhibitor being blended with coating in common mode, poly (hexamethylene) hydrochloride is passing through Be bonded on the strand of polyurethane, so that antiseptic and mildew resistant ability has excellent persistence, and has preparation process more For simple advantage；
In addition, carry out blending and modifying to polyurethane using Nano silica sol, introduce dissociation energy it is big, to the heat-staple official of light It can roll into a ball Si-O key (there is preferable electric conductivity, charge accumulated will not be generated, i.e., do not generate electrostatic, dust is difficult to stick), and And crosspolymer key is formed in emulsion polymerization process, the crosslink density of coating can be increased, become resin by linear macromolecule For solid type structure, the hardness and compactness of coating are improved, fine and close structure makes the weather-proof, water-fast of coating, stain resistance enhancing； In addition, the silica solution molecule of fully reacting is not attached to the surface of external wall and filler particles, with the evaporation of moisture, mSiO2·nH2Dehydration forms the solid netted skeleton of firm silicon oxygen bond between O particle, and the activity of polyurethane molecular chain is very strong in addition, The compact structure of coating can be made hard, improve the hardness, water resistant and rub resistance of coating；
The modified composite aerogel is prepared by the following method:
It (1) is 1:9:25 by the mixing of aluminium chloride, dehydrated alcohol and deionized water according to molar ratio, 150r/min is stirred at room temperature 5h is mixed, colloidal sol is obtained, colloidal sol is removed into removing chloride by strong-base anion-exchange resin；
(2) it keeps 150r/min at the uniform velocity to stir, propylene oxide and formamide (propylene oxide and formamide is added into colloidal sol Addition can play accelerate colloidal sol to gel transition), after adding, continue to stir 40-50min, obtain gel；Wherein, it is added Formamide and propylene oxide molar ratio be 1:10, the quality of the propylene oxide of addition is 12 times of aluminium chloride quality；
(3) in 48 DEG C of drying boxes, gel is put into the ethanol solution (volume of ethyl orthosilicate according to volume ratio 1:2 Concentration is that 10%) middle heat preservation (carries out SiO for 24 hours2Compound coating, while enhance the network structure of gel), product is with anhydrous Ethyl alcohol rinses displacement (displacing excessive TEOS and pore water)；
(4) in 65 DEG C of drying boxes, according to the volume ratio 10:2-3 product for obtaining above-mentioned steps and trimethoxy methyl The hexane solution (mass fraction 20%) of silane mixes, and keeps the temperature 10-12h, after product rinses displacement with n-hexane, first 30 DEG C Drying for 24 hours, then heats to 60 DEG C of dry 48h, obtains composite aerogel；
(5) in closed container, deionized water and dispersing agent (being preferably polyethylene glycol) is added, after mixing evenly, It is slowly added to composite aerogel, 60r/min stirs 80-100min and forms evenly dispersed slurry to composite aerogel and water, takes out Vacuum simultaneously keeps lasting stirring, until the mass ratio of composite aerogel and water is 1:2.8-3, modified composite aerogel is made；Its In, the initial content of deionized water, dispersing agent and composite aerogel is 10:0.05:1.5-2；
In plural gel preparation process, gel is first changed using trimethoxymethylsila,e under wet gel state Property, with the hydroxyl group on aeroge surface dehydration condensation, one layer of the better polycondensation on the surface of gel occur for silane group Silane group (Si-O-Si and Al-O-Si group), can weaken SiO2And Al2O3Crystallinity so that gel effect is good；Together When, the silane group of gel surface can fill enhancing hole configurations, thereby result in the reduction in aperture, improve the ratio of aeroge Surface area and heat-proof quality, and one layer of silane group of the surface polycondensation of gel can effectively prevent aeroge normal temperature and pressure and do The collapsing of hole configurations, keeps the structure of aeroge more complete during dry, and the three-dimensional of composite aerogel can be maintained after dry Network structure improves the heat-proof quality of aeroge；Slurried processing (deionized water and dispersing agent are carried out to composite aerogel in advance Mixed liquor), dispersion compatibility of the composite aerogel in coating can not only be increased, and composite aerogel one can be retained Fixed hydrophobicity, and then keep excellent thermal and insulating performance of the composite aerogel powder in coating；
The coating the preparation method is as follows:
Modified composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent are pressed Ratio is successively added in reaction kettle, after 200r/min stirs 30-40min, grinds 10-12min using high speed dispersion grinder, 3000r/min stirs 25-30min again, obtains thermal insulation coatings.
Embodiment 1
A kind of heat insulating coatings used for building exterior wall, are made of following raw material: 50 parts of modified polyurethane is modified again Close 30 parts of aeroge, 8 parts of floating bead, 1.5 parts of rutile type titanium white, 1.5 parts of silicon carbide, 2 parts of saltcake, 0.6 part of auxiliary agent；
The coating is made as follows of method:
Modified composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent are pressed Ratio is successively added in reaction kettle, after 200r/min stirs 30min, grinds 10min using high speed dispersion grinder, then 3000r/min stirs 25min, obtains thermal insulation coatings.
Embodiment 2
A kind of heat insulating coatings used for building exterior wall, are made of following raw material: 55 parts of modified polyurethane is modified again Close 33 parts of aeroge, 10 parts of floating bead, 1.8 parts of rutile type titanium white, 1.8 parts of silicon carbide, 2.8 parts of saltcake, 0.8 part of auxiliary agent；
The coating is made as follows of method:
Modified composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent are pressed Ratio is successively added in reaction kettle, after 200r/min stirs 35min, grinds 11min using high speed dispersion grinder, then 3000r/min stirs 27min, obtains thermal insulation coatings.
Embodiment 3
A kind of heat insulating coatings used for building exterior wall, are made of following raw material: 60 parts of modified polyurethane is modified again Close 36 parts of aeroge, 12 parts of floating bead, 2 parts of rutile type titanium white, 2 parts of silicon carbide, 3 parts of saltcake, 1 part of auxiliary agent；
The coating is made as follows of method:
Modified composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent are pressed Ratio is successively added in reaction kettle, after 200r/min stirs 40min, grinds 12min using high speed dispersion grinder, then 3000r/min stirs 30min, obtains thermal insulation coatings.
Comparative example 1
Change the modified polyurethane in embodiment 1 into conventional polyurethanes, remaining raw material and preparation process are constant.
Comparative example 2
Modification composite aerogel in embodiment 1 is changed to general silica aeroge, remaining raw material and preparation process It is constant.
Comparative example 3
Rutile type titanium white raw material in embodiment 1 is removed, remaining raw material and preparation process are constant.
Comparative example 4
Saltcake raw material in embodiment 1 is removed, remaining raw material and preparation process are constant.
Following performance test is done to coating made from embodiment 1-3 and comparative example 1-4:
Each coating is sprayed into surface of aluminum plate, the dry solidification 10min at 120 DEG C obtains each coating；
Coating hardness is tested, the pressure resistance of testing coating by GB/T 6739-1996 " hardness of film pencil measuring method " Degree；Coating stain resistance is tested with reference to GB/T 9780-2013 " Test method for dirt resistance of film of architectural coatings and paint "；Using Succusion tests the anti-microbial property (bacteriostasis rate) of coating, tests the anti-microbial property of the coating after 48h is washed, and tests mould proof etc. Grade；Test the thermal coefficient and the heatproof upper limit of 25 DEG C of coating；Test result is as follows table 1:
Table 1
As shown in Table 1, the hardness of coating made from embodiment 1-3 is B, compression strength 10.36-10.62MPa, resistant Grade has obtained 0 grade, illustrates the good mechanical properties of coating produced by the present invention；To Escherichia coli and staphylococcus aureus Bacteriostasis rate be 99.5% or more, by washing after the bacteriostasis rate of Escherichia coli and staphylococcus aureus is also reached 99.4% or more, illustrating coating produced by the present invention not only has good bacteria mildew-proof performance, but also bacteria mildew-proof performance With durability；Compared to comparative example 1, illustrate that after modification, it is good antibacterial can not only to assign coating for polyurethane Fungicidal properties, and can be improved the intensity and hardness of coating；
The thermal coefficient of coating made from embodiment 1-3 is 0.038-0.039W/mK, and the heatproof upper limit is 250-254 DEG C, Illustrate that coating produced by the present invention has lower thermal coefficient and the higher heatproof upper limit；In conjunction with comparative example 2, illustrate aeroge By modified, the heat preservation and insulation of coating can be improved；In conjunction with comparative example 3, illustrate rutile type titanium white and silicon carbide Have the function of that synergistic improves heat preservation and insulation；In conjunction with comparative example 4, illustrate that saltcake has synergistic effect, can in coating The heat preservation and insulation of other filler synergistics raising material；
Thermal insulation property test is thermally shielded according to coating of the GB/T 3399-1982 to embodiment 1 and comparison 2-4；Test knot Fruit such as the following table 2:
Table 2
As shown in Table 2, (2h) heat insulation is good in a long time for the coating of embodiment 1, temperature without apparent increase, Show that coating produced by the present invention has excellent thermal and insulating performance；Comparative example 2-4 has heating by a relatively large margin after 2h, In conjunction with comparative example 2, it is modified to illustrate that aeroge passes through, can be improved the heat preservation and insulation of coating；In conjunction with comparative example 3, explanation Rutile type titanium white and silicon carbide have the function of that synergistic improves heat preservation and insulation；In conjunction with comparative example 4, illustrate that saltcake has Synergistic effect can improve the heat preservation and insulation of material with other filler synergistics in coating.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification, It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only It is limited by claims and its full scope and equivalent.

Claims (7)

1. a kind of heat insulating coatings used for building exterior wall, which is characterized in that be made of following raw material: modified polyurethane 50-60 parts, composite aerogel 30-36 parts modified, 8-12 parts of floating bead, 1.5-2 parts of rutile type titanium white, 1.5-2 parts of silicon carbide, 2-3 parts of saltcake, 0.6-1 parts of auxiliary agent；
The coating is made by the following method:
Composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent will be modified in proportion It is successively added in reaction kettle, after 200r/min stirs 30-40min, grinds 10-12min using high speed dispersion grinder, then 3000r/min stirs 25-30min, obtains thermal insulation coatings.
2. a kind of heat insulating coatings used for building exterior wall according to claim 1, which is characterized in that the modified polyurethane It prepares by the following method:
1) aqueous solution of polyether polyol and poly (hexamethylene) hydrochloride is separately added into three-necked flask, stirring is warming up to It 120 DEG C, vacuumizes to be dehydrated after 2h and system is down to room temperature；
2) whole system is warming up to 70-80 DEG C, methyl diphenylene diisocyanate is added dropwise into system with dropping funel, simultaneously It is stirred continuously, then trimethylolpropane, dibutyl tin dilaurate and dimethylbenzene is added successively, after constant temperature stirs 1.5h, add Enter Nano silica sol, continues to keep the temperature 1h, modified polyurethane is made in cooling discharge.
3. a kind of heat insulating coatings used for building exterior wall according to claim 2, which is characterized in that the silica solution adds Enter 12% that amount is system quality, the substance of polyether polyol, methyl diphenylene diisocyanate and poly (hexamethylene) acid The ratio between amount 1:1.05:0.01.
4. a kind of heat insulating coatings used for building exterior wall according to claim 1, which is characterized in that the compound gas of modification Gel is prepared by the following method:
It (1) is 1:9:25 by the mixing of aluminium chloride, dehydrated alcohol and deionized water according to molar ratio, 150r/min is stirred at room temperature 5h obtains colloidal sol, and colloidal sol is removed removing chloride by strong-base anion-exchange resin；
(2) it keeps 150r/min at the uniform velocity to stir, propylene oxide and formamide is added into colloidal sol, after adding, continue to stir 40- 50min obtains gel；
(3) in 48 DEG C of drying boxes, gel is put into the ethanol solution of ethyl orthosilicate according to volume ratio 1:2 and is kept the temperature for 24 hours, Product is rinsed with dehydrated alcohol and is replaced；
(4) in 65 DEG C of drying boxes, according to the volume ratio 10:2-3 product for obtaining above-mentioned steps and trimethoxymethylsila,e Hexane solution mixing, keep the temperature 10-12h, product with n-hexane rinse displacement after, first 30 DEG C of dryings for 24 hours, then heat to 60 DEG C dry 48h, obtains composite aerogel；
(5) in closed container, deionized water is added and dispersing agent is slowly added to composite aerogel, 60r/ after mixing evenly Min stirs 80-100min and forms evenly dispersed slurry to composite aerogel and water, vacuumizes and keeps continuing stirring, until Composite aerogel and the mass ratio of deionized water are 1:2.8-3, and modified composite aerogel is made.
5. a kind of heat insulating coatings used for building exterior wall according to claim 4, which is characterized in that be added in step (2) Formamide and propylene oxide molar ratio be 1:10, the quality of the propylene oxide of addition is 12 times of aluminium chloride quality.
6. a kind of heat insulating coatings used for building exterior wall according to claim 4, which is characterized in that gone in step (5) from The initial content of sub- water, dispersing agent and composite aerogel is 10:0.05:1.5-2.
7. a kind of preparation method of heat insulating coatings used for building exterior wall, which comprises the steps of:
Composite aerogel, modified polyurethane, floating bead, rutile type titanium white, silicon carbide, saltcake and auxiliary agent will be modified in proportion It is successively added in reaction kettle, after 200r/min stirs 30-40min, grinds 10-12min using high speed dispersion grinder, then 3000r/min stirs 25-30min, obtains thermal insulation coatings.
CN201910769063.6A 2019-08-20 2019-08-20 A kind of heat insulating coatings used for building exterior wall and preparation method thereof Withdrawn CN110484119A (en)

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CN111826046A (en) * 2020-07-30 2020-10-27 马鞍山市金韩防水保温工程有限责任公司 Environment-friendly water-based paint for buildings and preparation method thereof
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CN111892848A (en) * 2020-08-03 2020-11-06 马鞍山市金韩防水保温工程有限责任公司 Anti-aging coating for building exterior wall and preparation method thereof
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CN111925704A (en) * 2020-07-23 2020-11-13 马鞍山市金韩防水保温工程有限责任公司 Heat-insulating coating and preparation method thereof
CN113105808A (en) * 2021-01-20 2021-07-13 颜志兵 Self-cooling heat-conducting coating for LED lamp
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CN111704794A (en) * 2020-06-29 2020-09-25 深圳市象形科技有限公司 Anti-seismic barrier foam and preparation method thereof
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CN111876041A (en) * 2020-07-30 2020-11-03 马鞍山市金韩防水保温工程有限责任公司 Antibacterial waterproof coating for building exterior wall and preparation method thereof
CN111826046A (en) * 2020-07-30 2020-10-27 马鞍山市金韩防水保温工程有限责任公司 Environment-friendly water-based paint for buildings and preparation method thereof
CN111826045A (en) * 2020-07-30 2020-10-27 马鞍山市金韩防水保温工程有限责任公司 Heat insulation coating for building exterior wall and preparation method thereof
CN111892848A (en) * 2020-08-03 2020-11-06 马鞍山市金韩防水保温工程有限责任公司 Anti-aging coating for building exterior wall and preparation method thereof
CN111925708A (en) * 2020-08-03 2020-11-13 马鞍山市金韩防水保温工程有限责任公司 Water-soluble paint for building
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CN116694209A (en) * 2023-05-24 2023-09-05 上海北新月皇新材料集团有限公司 Heat insulation coating and preparation method thereof
CN116694209B (en) * 2023-05-24 2024-06-28 上海北新月皇新材料集团有限公司 Heat insulation coating and preparation method thereof
CN117487428A (en) * 2023-11-02 2024-02-02 广州芯联化工产品有限公司 Functional natural latex glove inner coating and preparation process thereof
CN117487428B (en) * 2023-11-02 2024-04-26 广州芯联化工产品有限公司 Functional natural latex glove inner coating and preparation process thereof

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Application publication date: 20191122