CN109233493A - Hot coating of a kind of high reflectance acrylic acid screening and preparation method thereof - Google Patents
Hot coating of a kind of high reflectance acrylic acid screening and preparation method thereof Download PDFInfo
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- CN109233493A CN109233493A CN201710326612.3A CN201710326612A CN109233493A CN 109233493 A CN109233493 A CN 109233493A CN 201710326612 A CN201710326612 A CN 201710326612A CN 109233493 A CN109233493 A CN 109233493A
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- high reflectance
- acrylic acid
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/28—Glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
Abstract
The present invention relates to a kind of high reflectance acrylic acid to hide hot coating and preparation method thereof, the high reflectance acrylic acid hide hot coating include: acrylic resin be 20~55 wt%, titanium dioxide is 10~33 wt%, modified aluminium powder is 6~12 wt%, heat insulating function filler is 3.2~7.6 wt%, mixed solvent is 9~17 wt%, remaining is auxiliary agent, and the sum of each component mass percent is 100%；The modified aluminium powder is the flake aluminum that surface is coated with titanium dioxide.The present invention does film forming matter using acrylic resin, the surface that high reflectance is added is coated with the flake aluminum of titanium dioxide, titanium dioxide, and the heat insulating function filler extremely low with good thermal and insulating performance heat transfer coefficient, so that heat reflection coatings of the invention realize the characteristics of sunlight reflection, radiated infrared light wave and trap heat conduction Trinity, the effect of good heat insulation and heat control is played.
Description
Technical field
The present invention relates to a kind of high reflectance acrylic acid to hide hot coating and preparation method thereof, belongs to and hides hot coating technology neck
Domain.
Background technique
With the improvement of living standards, demand of the people to the energy also increasingly increases, the energy of the consumption of China's building trade
Amount will account for a quarter of total energy consumption, and freeze and the consumed energy of heating account for the half of building trade total energy consumption with
On, but also in cumulative year after year.Thus, heat-reflective hides hot energy-saving coatings and possesses very outstanding research significance.It is squeegeed onto
In external surface of objects, heat can be reduced in the accumulation and transmitting in the coating of coating surface, hull-skin temperature is allowed to decline, into
And realize the purpose of interior of articles temperature decline.This coating is applied to external wall or roof, reflection and spoke may be implemented
The heat preservation purpose of heat is penetrated, keeps room temperature constant, increases the temperature difference of indoor and outdoor, reduces air-conditioning Energy in use in summer；And
Decoration and the protection functions such as wall or roof, hydrophobic and resistant can be played.
Other than being applied to external wall or roof, there are many more other applications for this coating.It is understood that seed is close
It will do it anaerobic respiration in the environment of closing and release heat, and higher temperature can make grain go mouldy, therefore be also required to consume
Expense energy removes driving cooling installation, to guarantee the normal condition of grain；In addition, it is directly exposed to the oil tank under shining upon,
Due to absorb the sun energy, temperature increase, and temperature it is raised to a certain degree when, will explode, endanger our life
Order safety and property safety；In city, tropical island effect is more universal, this is because city Green tree and grass coverage is small, and black
Asphalt road and asphalt surface then absorb heat, to cause The Surroundings in Cities temperature 3~5 DEG C higher than rural area.Therefore, the painting
Material suffers from good application in fields such as silo, oil tank and road surfaces.
Recent domestic is relatively more to the research for hiding hot coating, and existing 104830178 A of CN discloses a kind of metal watch
Face solar heat reflecting and heat insulating coating and its preparation method and application, the sun light reflectivity after film 0.9 or more, but
Coating thickness needs to reach 2mm or more, not ideal enough.CN 1583894 discloses a kind of preparation method of heat insulating reflecting coating,
Its thickness of dry film is in 0.3~0.8mm, to heat ray average reflectance 0.9 or more, but matrix surface temperature is only made to decline 10
~20 DEG C, cooling effect is not ideal enough.Coating in the prior art can not reach high reflecting effect with lower thickness, from
And the accumulation and transmission of metope more heat transfer being caused, and then room temperature is caused to increase, the heat-proof quality of coating is poor.
Summary of the invention
In view of the above drawbacks of the prior art with problem, present invention adds modified aluminium powder, (surface is coated with titanium dioxide
Flake aluminum), provide a kind of hot coating of screening and preparation method thereof for being provided simultaneously with low thickness and high sun light reflectivity.
On the one hand, the present invention provides a kind of high reflectance acrylic acid to hide hot coating, and the high reflectance acrylic acid hides heat
Coating include: acrylic resin be 20~55wt%, titanium dioxide is 10~33wt%, modified aluminium powder is 6~12wt%, heat-insulated function
Energy filler is 3.2~7.6wt%, mixed solvent is 9~17wt%, remaining is auxiliary agent, and the sum of each component mass percent is
100%；
The modified aluminium powder is the flake aluminum that surface is coated with titanium dioxide.
The present invention is using acrylic resin as film forming matter, and the modified aluminium powder of high reflectance is added, and (surface is coated with dioxy
Change the flake aluminum of titanium), titanium dioxide, and the heat insulating function filler extremely low with good thermal and insulating performance heat transfer coefficient.
Modified aluminium powder and titanium dioxide allow the hot coating of screening of the invention to reflect most of sunray；Meanwhile modified aluminium powder is by base
The heat that body absorbs is radiate in the form of infrared waves；Finally, the extremely low heat insulating function filler of heat transfer coefficient can hinder base
The tired heat of body surface area is conducted to intrinsic silicon.Wherein, there is high dielectric constant, excellent on the aluminium powder surface of modified aluminium powder
The titanium dioxide of good covering power and antioxygenic property improves sheet while playing aluminium flake excellent reflection performance
Dispersibility, corrosion resistance and the oxidation resistance of aluminium powder.
Preferably, the acrylic resin be Hydroxylated acrylic resin, epoxy acrylic resin, polyester acrylate resin and
At least one of polyurethane acrylic resin.
Preferably, the titanium dioxide is rutile type titanium white, particle size range is 200~900nm.
Preferably, the particle size range of the modified aluminium powder is at 10~20 μm.
Preferably, the heat insulating function filler is hollow glass micropearl, particle size range is 5~60 μm.
Preferably, the mixed solvent is the mixed of butyl acetate, dimethylbenzene and high boiling solvent DBE (dibasic ester) three
It closes.
Also, preferably, the in the mixed solvent each component accounts for the quality hundred that high reflectance acrylic acid hides hot coating gross mass
Score proportion are as follows: dimethylbenzene be 5.5~10wt%, butyl acetate be 3.2~5.6wt%, high boiling solvent DBE be 0.5~
1wt%.
Preferably, the auxiliary agent is selected from least one of dispersing agent, levelling agent, defoaming agent and anti-settling agent.
Preferably, each component accounts for the percent mass proportioning that high reflectance acrylic acid hides hot coating gross mass in the auxiliary agent
Are as follows: dispersing agent be 1~3.3wt%, levelling agent be 0.4~1wt%, defoaming agent be 0.4~1wt%, anti-settling agent be 0.5~
1.2wt%.
On the other hand, the present invention also provides a kind of as above-mentioned high reflectance acrylic acid hides hot preparation method for coating, comprising:
Acrylic resin, mixed solvent and various auxiliary agents are stirred 10~30 minutes under 800~1000r/ minutes；
Then it is stirring 40~80 minutes lower with 2000~3000r/ minutes that titanium dioxide is added；
It is eventually adding modified aluminium powder, heat insulating function filler, is stirred 30~60 minutes under 100~300r/ minutes, the height is made
Reflectivity acrylic acid hides hot coating.
It reacts 4~6 hours, obtains at 50~70 DEG C preferably, butyl titanate is added in the ethanol solution of flake aluminum
Modified aluminium powder.
Also, preferably, the proportion of the butyl titanate and flake aluminum are as follows: corresponding 2~4g piece in every 10ml butyl titanate
Shape aluminium powder.
In another aspect, the present invention also provides a kind of coating for hiding hot coating preparation by above-mentioned high reflectance acrylic acid,
The thickness of dry film of the coating is 20~130 μm, and the average reflectance to sunlight is 85~90%.
The present invention does film forming matter using acrylic resin (for example, hydroxyl acrylic emulsion etc.), and high reflectance is added
Modified aluminium powder (flake aluminum that surface is coated with titanium dioxide), titanium dioxide, and there is the heat transfer of good thermal and insulating performance
The extremely low heat insulating function filler of coefficient so that heat reflection coatings of the invention realize sunlight reflection, radiated infrared light wave with
And the characteristics of trap heat conduction Trinity, play the effect of good heat insulation and heat control.Modified aluminium powder and titanium dioxide make this
The hot coating of the screening of invention can reflect most of sunray；Meanwhile modified aluminium powder by the heat of Matrix absorption with infrared waves
Form radiate；Finally, the extremely low heat insulating function filler of heat transfer coefficient heat that matrix surface can be hindered to accumulate is to matrix
Inside conduction.After extensive and in-depth study, by improving preparation process, the sunlight (wavelength of coating is made in the present inventor
300~2500nm) up to 85% or more, the average reflectance of infrared band (780~2500nm of wavelength) is average reflectance
88% or more, the heat-insulated temperature difference reaches 25~30 DEG C of reflective heat-insulation paint.
Detailed description of the invention
Fig. 1 be in embodiment 1-4 the coating (coating dry film) for preparing in wavelength 200~2500nm reflectivity map.
Specific embodiment
The present invention is further illustrated below by way of following embodiments, it should be appreciated that following embodiments are merely to illustrate this
Invention, is not intended to limit the present invention.
The present invention utilizes rutile type titanium white, aluminium powder and heat insulating function filler, what cooperation met with sunlight wavelength
Partial size proportion realizes that trap heat is transmitted in all directions, with multi-angle, reaches the energy-efficient final purpose of heat insulation and heat control.Prepared painting
The composition of material includes: that acrylic resin can be for 30~55wt%, and titanium dioxide can be 10~33wt%, modified aluminium powder can for 6~
12wt%, heat insulating function filler can be 3.2~7.6wt%, and mixed solvent can be 9~17wt%, remaining is auxiliary agent, each group sub-prime
Measuring the sum of percentage is 100%.The modified aluminium powder can be coated with the flake aluminum of titanium dioxide for surface.
Above-mentioned acrylic resin selects Hydroxylated acrylic resin, epoxy acrylic resin, polyester acrylate resin and poly- ammonia
At least one of ester acrylic resin.Above-mentioned titanium dioxide can be that rutile type titanium white particle size range is 200~900nm.On
Stating aluminium powder is by the flake aluminum of coated by titanium dioxide, and particle size range is 10~20 μm.Above-mentioned heat insulating function filler can be hollow
Glass microballoon, particle size range are 10~30 μm.
Above-mentioned mixed solvent is butyl acetate, dimethylbenzene and high boiling solvent DBE (dibasic ester).The in the mixed solvent
The mass percent proportion of each component is preferred are as follows: dimethylbenzene is 5.5~10wt%, and butyl acetate is 3.2~5.6wt%, high boiling
Point solvent DBE is 0.5~1wt%.
Above-mentioned auxiliary agent can be selected from least one of dispersing agent, levelling agent, defoaming agent and anti-settling agent, preferably comprise dispersion
Agent (may be, for example, BYK-161 dispersing agent, BYK-163 dispersing agent and Silok-7455 dispersing agent etc.), levelling agent (may be, for example,
432 levelling agents and BYK-333 levelling agent etc.), it is defoaming agent (may be, for example, 5500 defoaming agents and BYK-141 defoaming agent etc.), anti-settling
Agent (may be, for example, 202P anti-settling agent and B-75 anti-settling agent etc.).Preferably, in the auxiliary agent each component percent mass proportioning are as follows:
Dispersing agent be 1~3.3wt%, levelling agent be 0.4~1wt%, defoaming agent be 0.4~1wt%, anti-settling agent be 0.5~
1.2wt%.
As an example, the hot coating of the screening of preparation, it is characterised in that match by weight percent: 7119-X-50 hydroxyl
Acrylic resin is 30~55wt%, and rutile type titanium white is 10~33wt%, and modified aluminium powder is 6~12wt%, hollow glass
Glass microballon is 3.2~7.6wt%, and dimethylbenzene is 5.5~10wt%, and butyl acetate is 3.2~5.6wt%, high boiling solvent DBE
For 0.5~1wt%, dispersing agent is 1~3.3wt%, and levelling agent is 0.4~1wt%, and defoaming agent is 0.4~1wt%, anti-settling agent
For 0.5~1.2wt%, the sum of each component mass percent is 100%.
Illustrate to following exemplary that high reflectance acrylic acid provided by the invention hides the preparation method of hot coating.
Prepare modified aluminium powder.Butyl titanate is added in the ethanol solution of flake aluminum small in 50~70 DEG C of reactions 4~6
When, obtain modified aluminium powder.The proportion of the butyl titanate and flake aluminum can be the corresponding 2~4g flaky aluminum of every 10ml butyl titanate
Powder.As an example, aluminium powder is added to absolute ethanol ultrasonic disperse, and in 50~70 DEG C of 30~50min of stirring；Titanium is added
Acid butyl ester continues 4~6h of stirring, and stands and obtain white gray precipitate things, centrifugal filtration, 100 DEG C of dryings.
By acrylic resin (acrylic emulsion), mixed solvent, various auxiliary agents with 800~1000r/min stirring.As one
Dimethylbenzene, butyl acetate, high boiling solvent DBE, dispersing agent, levelling agent, defoaming agent and anti-settling agent are separately added into hydroxyl by a example
In base acrylic resin, 10~30min is stirred with 800~1000r/min.
Then nano size Titania (titanium dioxide) is added, stirs 40~80min at 2000~3000r/min of high speed.
It is eventually adding modified aluminium powder, hollow glass micropearl, 30~60min under 100~300r/min of low speed stirring is made
The high reflectance acrylic acid hides hot coating.
It is an advantage of the current invention that using the rutile type titanium white for having high refractive index, modified aluminium powder is (by titanium dioxide packet
The flake aluminum covered) and low thermal conductivity heat-insulation functional material (such as hollow glass micropearl) it is compound, cooperate multistage grain
The better heat reflection coatings of performance are made in the compound powder mixture ratio for meeting sunlight wavelength of diameter, and technique is extremely simple, is easy to
Operation.It is experimentally confirmed that the coating of this addition modified aluminium powder, can make metal surface realize 25 DEG C of temperature drop or more, can effectively drop
Low enterprise energy consumption, increases economic efficiency.
The present invention also provides a kind of coatings (coating dry film) that hot coating preparation is hidden using high reflectance acrylic acid.Preparation
Progress drying at room temperature 2 days (d) after method includes spraying, blade coating, directly coats.Substrate used can be metal, ceramics etc..It is described dry
The thickness of membrane coat can be adjusted as needed, and may generally be 20~130 μm, preferably between 80~130 μm.
Coating reflectivity test and the experiment of the heat-insulated temperature difference: hiding hot coating for high reflectance acrylic acid and be coated on surface of aluminum plate,
Obtained after dry (natural drying at room temperature 2d) 150 × 75mm with a thickness of 80~130 μm of coating.Then at 25 DEG C, simulation
Sunlight irradiation tests R (780~2500nm) according to standard JGT235-2014 using UV, visible light infrared spectrophotometer.So
Afterwards at 25 DEG C of laboratory temperature, simulated solar irradiation irradiation covers cated aluminium sheet and black sample plate, measures two backs
Temperature, the heat-insulated temperature difference are 25 DEG C or more (testing standard and method are according to MIL-E-46096C).
Adhesive force level estimate (standard testing is national standard experiment test GB/T9286).
Water contact angle test: sessile drop method measures coating surface water contact angle.Resistance to water logging test: room temperature immersion test is used
Method.
Enumerate embodiment further below with the present invention will be described in detail.It will similarly be understood that following embodiment is served only for this
Invention is further described, and should not be understood as limiting the scope of the invention, those skilled in the art is according to this hair
Some nonessential modifications and adaptations that bright above content is made all belong to the scope of protection of the present invention.Following examples are specific
Technological parameter etc. is also only an example in OK range, i.e. those skilled in the art can be done properly by the explanation of this paper
In the range of select, and do not really want to be defined in hereafter exemplary specific value.If without specified otherwise, agents useful for same packet in the present invention
It includes: Hydroxylated acrylic resin (Tai Chang resin Co., Ltd, 7119-X-50), titanium dioxide (200~900nm of particle size range, Yunnan
New vertical, R-803), modified aluminium powder, dimethylbenzene, butyl acetate, high boiling solvent (Shanghai De Yu get Co., Ltd, dibasic ester
DBE), levelling agent (Tao Shi, 245 levelling agents), defoaming agent (BYK-Gardner company, BYK-065), (the modest chemistry of moral has anti-settling agent
Limit company, 202P), hollow glass micropearl (10~30 μm of particle size range, Shanghai Zhen Xu Chemical Co., Ltd.).
Embodiment 1:
By percent mass proportioning: Hydroxylated acrylic resin (Tai Chang resin Co., Ltd, 7119-X-50) is 44%, R-803 titanium white
Powder (200~900nm of particle size range) is 26%, and modified aluminium powder (flake aluminum that surface is coated with titanium dioxide) is 9%, diformazan
Benzene is 8%, butyl acetate 5%, and high boiling solvent DBE (dibasic ester) is 1%, and 245 levelling agents are that 0.5%, BYK-065 disappears
Infusion is that 0.5%, 202P anti-settling agent is 1wt%, and (10~30 μm of particle size range, Shanghai vibration rising sun chemical industry is limited for hollow glass micropearl
Company) it is 5%；
Preparation method: ultrasonic disperse in 200ml dehydrated alcohol is added in 6g flake aluminum (8~15 μm of particle size range), and 60
DEG C stirring 30min, is added 20ml butyl titanate, continues to stir 6h, and stand and obtain white gray precipitate things, centrifugal filtration, 100 DEG C
It is dry, modified aluminium powder is made.Hydroxylated acrylic resin, solvent, various auxiliary agents are stirred into 10min with middling speed 800r/min, then
Nano size Titania is added, 40min is stirred with high speed 2500r/min, is eventually adding modified aluminium powder, is stirred with 300r/min
30min is made a kind of with the coating for hiding heat function, and using aluminium sheet as substrate, gained coating is covered in base using knife coating procedure
Bottom surface obtains coating after dry (natural drying at room temperature 2d).The coating layer thickness is 80 μm.The performance test knot of the coating of preparation
Fruit is shown in Table 1 and Fig. 1.
Embodiment 2:
By percent mass proportioning: Hydroxylated acrylic resin (Tai Chang resin Co., Ltd, 7119-X-50) is 46%, titanium dioxide titanium
White powder (200~900nm of particle size range, Yunnan are newly stood, R-803) is 23%, hollow glass micropearl (10~30 μm of particle size range,
Shanghai Zhen Xu Chemical Co., Ltd.) it is 5%, modified aluminium powder (flake aluminum that surface is coated with titanium dioxide) is 9%, dimethylbenzene
It is 7.5%, butyl acetate 4.5%, high boiling solvent DBE is that 0.9%, BYK-161 dispersing agent is 2%, and 245 levelling agents are
0.44%, BYK-065 defoaming agent are that 0.66%, 202P anti-settling agent is 1%；
Preparation method: ultrasonic disperse in 200ml dehydrated alcohol is added in 6g flake aluminum (8~15 μm of particle size range), and 60
DEG C stirring 30min, is added 20ml butyl titanate, continues to stir 6h, and stand and obtain white gray precipitate things, centrifugal filtration, 100 DEG C
It is dry, modified aluminium powder is made；By hydroxyl acrylic emulsion (Hydroxylated acrylic resin), solvent, various auxiliary agents with middling speed 800r/
Min stirs 10min, and nano size Titania high speed 2500r/min is then added and stirs 40min, and it is micro- that hollow glass is added followed by
A kind of coating that heat function is hidden with reflection is made with low speed 200r/min stirring 30min in pearl and aluminium powder.Using aluminium sheet as substrate,
Gained coating is covered in substrate surface using knife coating procedure, obtains coating after dry (natural drying at room temperature 2d).The painting thickness
Degree is 100 μm.The performance test results of the coating of preparation are shown in Table 1 and Fig. 1.
Embodiment 3:
By percent mass proportioning: Hydroxylated acrylic resin (Tai Chang resin Co., Ltd, 7119-X-50) is 46%, titanium dioxide (grain
Diameter 200~900nm of range, Yunnan are newly stood, R-803) it is 23%, modified aluminium powder (flake aluminum that surface is coated with titanium dioxide)
It is 9%, dimethylbenzene 7.7%, (10~30 μm of particle size range, Shanghai Zhen Xu Chemical Co., Ltd.) of hollow glass micropearl are 4%,
Butyl acetate is 5%, and high boiling solvent DBE is that 1%, BYK-161 dispersing agent is 2.3%, and 245 levelling agents are 0.5%, BYK-
065 defoaming agent is that 0.5%, 202P anti-settling agent is 1%；
Preparation method: ultrasonic disperse in 200ml dehydrated alcohol is added in 6g flake aluminum (8~15 μm of particle size range), and 60
DEG C stirring 30min, is added 20ml butyl titanate, continues to stir 6h, and stand and obtain white gray precipitate things, centrifugal filtration, 100 DEG C
It is dry, modified aluminium powder is made；Hydroxyl acrylic emulsion, solvent, various auxiliary agents are stirred into 20min with 1000r/min, are then added
Nano size Titania high speed 2500r/min stirs 40min, is eventually adding aluminium powder, stirs 20min with 300r/min, one kind is made
The coating of heat function is hidden with reflection.Using aluminium sheet as substrate, gained coating is covered in substrate surface using knife coating procedure, it is dry
Coating is obtained after (natural drying at room temperature 2d).The coating layer thickness is 90 μm.The performance test results of the coating of preparation are shown in Table 1 and figure
1。
Embodiment 4:
By percent mass proportioning: Hydroxylated acrylic resin (Tai Chang resin Co., Ltd, 7119-X-50) is 40%, titanium dioxide (grain
Diameter 200~900nm of range, Yunnan are newly stood, R-803) it is 24%, modified aluminium powder (flake aluminum that surface is coated with titanium dioxide)
It is 9%, (10~30 μm of particle size range, Shanghai Zhen Xu Chemical Co., Ltd.) of hollow glass micropearl are 7.6%, and dimethylbenzene is
8.5%, butyl acetate 5.4%, high boiling solvent DBE is 1.1%, dispersing agent 2.2%, and 245 levelling agents are 0.44%,
BYK-065 defoaming agent is that 0.66%, 202P anti-settling agent is 1.1%；
Preparation method: ultrasonic disperse in 200ml dehydrated alcohol is added in 6g flake aluminum (8~15 μm of particle size range), and 60
DEG C stirring 30min, is added 20ml butyl titanate, continues to stir 6h, and stand and obtain white gray precipitate things, centrifugal filtration, 100 DEG C
It is dry, modified aluminium powder is made；Hydroxyl acrylic emulsion, solvent, various auxiliary agents are stirred into 20min with middling speed 800r/min, then
Nano size Titania high speed 3000r/min is added and stirs 30min, hollow glass micropearl and aluminium powder, low speed 300r/ are added followed by
A kind of coating with reflective insulation function is made in min stirring 20min.Using aluminium sheet as substrate, gained coating is used into blade coating side
Method is covered in substrate surface, obtains coating after dry (natural drying at room temperature 2d).The coating layer thickness is 87 μm.The coating of preparation
The performance test results are shown in Table 1 and Fig. 1.
Table 1 is the performance test results of coating prepared by 1-4 of the embodiment of the present invention:
Fig. 1 is that the coating (coating dry film) for preparing is in wavelength 200~2500nm reflectivity map in embodiment 1-4, from figure
In it can be seen that the coating for preparing exists to the reflectivity of most of visible light region (450~780nm of wavelength) in embodiment 1-4
90% or more, and near infrared region (780~2500nm of wavelength) is also kept to want higher reflectivity.
Claims (12)
1. a kind of high reflectance acrylic acid hides hot coating, which is characterized in that it includes: third that the high reflectance acrylic acid, which hides hot coating,
Olefin(e) acid resin is 20~55 wt%, titanium dioxide is 10~33 wt%, modified aluminium powder is 6~12 wt%, heat insulating function filler is
3.2~7.6wt%, mixed solvent are 9~17 wt%, remaining is auxiliary agent, and the sum of each component mass percent is 100%；
The modified aluminium powder is the flake aluminum that surface is coated with titanium dioxide.
2. high reflectance acrylic acid according to claim 1 hides hot coating, which is characterized in that the acrylic resin is hydroxyl
At least one of base acrylic resin, epoxy acrylic resin, polyester acrylate resin and polyurethane acrylic resin.
3. high reflectance acrylic acid according to claim 1 or 2 hides hot coating, which is characterized in that the titanium dioxide is gold
Red stone-type titanium dioxide, particle size range are 200~900 nm.
4. high reflectance acrylic acid according to any one of claim 1-3 hides hot coating, which is characterized in that the modification
The particle size range of aluminium powder is 10~20 μm.
5. high reflectance acrylic acid described in any one of -4 hides hot coating according to claim 1, which is characterized in that described heat-insulated
Functional stuffing is hollow glass micropearl, and particle size range is 5~60 μm.
6. high reflectance acrylic acid according to any one of claims 1-5 hides hot coating, which is characterized in that the mixing
Solvent is the mixing of dimethylbenzene, high boiling solvent DBE and butyl acetate three.
7. high reflectance acrylic acid according to claim 6 hides hot coating, which is characterized in that the in the mixed solvent each group
The mass percent proportion for accounting for high reflectance acrylic acid and hiding hot coating gross mass divided are as follows: dimethylbenzene is 5.5~10 wt%, acetic acid
Butyl ester is 3.2~5.6 wt%, and high boiling solvent DBE is 0.5~1 wt%.
8. high reflectance acrylic acid described in any one of -7 hides hot coating according to claim 1, which is characterized in that the auxiliary agent
Selected from least one of dispersing agent, levelling agent, defoaming agent and anti-settling agent.
9. high reflectance acrylic acid according to claim 8 hides hot coating, which is characterized in that each component accounts in the auxiliary agent
High reflectance acrylic acid hides the percent mass proportioning of hot coating gross mass are as follows: dispersing agent is 1~3.3 wt%, levelling agent 0.4
~1 wt%, defoaming agent are 0.4~1wt%, anti-settling agent is 0.5~1.2 wt%.
10. one kind high reflectance acrylic acid as described in any one of claim 1-9 hides hot preparation method for coating, feature exists
In, comprising:
Acrylic resin, mixed solvent and various auxiliary agents are stirred 10~30 minutes under 800~1000 r/ minutes；
Then it is stirring 40~80 minutes lower with 2000~3000 r/ minutes that titanium dioxide is added；
It is eventually adding modified aluminium powder, heat insulating function filler, is stirred 30~60 minutes under 100~300 r/ minutes, is made described
High reflectance acrylic acid hides hot coating.
11. preparation method according to claim 10, which is characterized in that the ethyl alcohol that flake aluminum is added in butyl titanate is molten
In liquid, is reacted 4~6 hours at 50~70 DEG C, obtain to surface and be coated with the flake aluminum of titanium dioxide.
12. a kind of coating for hiding hot coating preparation by high reflectance acrylic acid of any of claims 1-9, feature
It is, the thickness of dry film of the coating is 20~130 μm, and the average reflectance to sunlight is 85~90%.
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| CN114316716A (en) * | 2021-12-07 | 2022-04-12 | 广东美涂士建材股份有限公司 | High-temperature-resistant light-reflection environment-friendly water-based paint and preparation method thereof |
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