CN104212276A - Black solar heat reflective cooling coating and preparation method thereof - Google Patents
Black solar heat reflective cooling coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a black solar heat reflective cooling coating and a preparation method thereof. By integrating two cooling mechanisms of reflection and radiation and adopting a waterborne acrylic emulsion as a film forming base material, the coating is good in anti-aging performance, long in outdoor service life and non-toxic and environmentally friendly, has excellent stain resistance, alkaline resistance and water resistance and has a good adhesive force to base materials such as concrete, metals, woods and glass. By adding a black functional pigment which has a strong near infrared reflection or transmission performance supplemented by various extender pigments and auxiliaries, the coating is simple in preparation, low in cost and environmentally friendly. Compared with common black coatings, the black solar heat reflective cooling coating has a better near infrared reflection or transmission performance, so that the coating can be used for reducing surface and inner temperatures of coated objects such as concrete, metals, woods and foam plastic in summer. The coating can be widely applied to roofs of buildings and has an ideal energy-saving and cooling effect while has a beautiful effect.
Description
Technical field
The present invention relates to a kind of black solar heat reflection High tailored coating and preparation method thereof, is particularly black solar heat reflection High tailored coating of film forming binder and preparation method thereof with aqueous acrylic emulsion.
Background technology
Sunlight is hertzian wave, is mainly distributed in UV-light, visible ray and near infrared three regions.Shared by UV-light, visible ray and near infrared, the ratio of sun power is approximately 5%, 45% and 50% respectively.Excellent white solar heat reflection High tailored coating can reflect the visible ray of more than 90 percent and the near infrared of about 90 percent.Therefore, white solar heat reflection High tailored coating has that high, the hot incidence of Solar reflectance is high and specific absorption is low, there is excellent temperature reduction performance, for those refrigeration demand in building energy consumption for prevailing area, building roof and exterior wall adopt white solar heat reflection High tailored coating, significantly can reduce the cooling in summer energy consumption of buildings.Relatively be applicable to flat roof or the very little sloped roof of the gradient.Although white solar heat reflection High tailored coating is building roof and the exterior coating of " cool ", white solar heat reflection High tailored coating is by the welcome of owner especially personal proprietor.Those building owners with sloped roof prefer dark paint usually based on the demand of aesthetics, and black is symbol that is noble, generous and that improve grade always, therefore the dark favor by building owner.In China Yangtze River Delta Region, the sloped roof of black is very general and popular, and black solar heat reflection High tailored coating has relatively wide market.
But the formula of blackwash is technical barrier of the prior art always.In order to present the outward appearance of black, blackwash must absorb nearly all visible ray, and in addition, conventional blackwash also has very strong absorption near infrared region.Therefore, adopt conventional blackwash to greatly reduce the Solar reflectance of coating, greatly improve Coated Surface Temperature, significantly must increase the energy consumption for cooling of buildings in summer or reduce the residence comfort of buildings.Thus, how coating visible region or near infrared region there is higher absorption rate while, reduce the total absorptivity to sunlight as far as possible, make blackwash have excellent temperature reduction performance concurrently, being the technical barrier that prior art faces, is also the focus of recent research.In addition, the shortcomings such as existing High tailored coating formula is complicated, preparation process is loaded down with trivial details and product ageing resistance poor, outdoor work-ing life is short, poor adhesive force, non-stain resistant.Therefore, be badly in need of black solar heat reflection High tailored coating at present, while guarantee color perception, ensure quality product.
Summary of the invention
For solving the problems of the technologies described above, the present invention aim to provide there is excellent near-infrared reflection performance, good cooling effect, have excellent weather resistance, the environment-friendly aqueous acrylic black solar heat reflection High tailored coating of convenient construction and preparation method thereof.
The technical solution used in the present invention is:
A kind of black solar heat reflection High tailored coating, is characterized in that: its its component and weight are:
ACRYLIC EMULSION 40 ~ 50 parts;
Black functional pigment 1 ~ 4 part;
Achromatic pigment 0.1 ~ 1 part;
Pigment extender 10 ~ 30 parts;
Auxiliary agent 0.5 ~ 5 part;
1 ~ 20 part, water.
As the preferred technical solution of the present invention, its component of described pigment extender and weight are:
Talcum powder 5 ~ 15 parts;
Water-ground limestone 1 ~ 2 part;
1 ~ 3 part, barium sulfate;
Silicon-dioxide 5 ~ 10 parts.
As the preferred technical solution of the present invention, its component of described auxiliary agent and weight as follows, the ratio between each component does not limit, can in following scope flexibly allocate:
Dispersion agent 0.1 ~ 1 part;
Wetting agent 0.1 ~ 1 part;
Defoamer 0.1 ~ 1 part;
Flow agent 0.1 ~ 1 part;
Film coalescence aid 0.1 ~ 1 part.
As the preferred technical solution of the present invention, described ACRYLIC EMULSION is mono-component aqueous pure acrylic latex, and its solid content is 45 ~ 48%, and viscosity is 1 ~ 6 Pas, and pH value is 7.5 ~ 9.5, minimum film-forming temperature 23 DEG C.
As the preferred technical solution of the present invention, described black functional pigment is in Palio root mineral black, permanent violet pigment, ferrochrome mineral black and ferrimanganic mineral black or two or more.All pigment is all that those of ordinary skill can well-determined pigment type in the industry, and all can directly purchase from market.
As the preferred technical solution of the present invention, described achromatic pigment is iron oxide yellow, titanium chrome yellow, exterior wall is orange, exterior wall is red or iron oxide red or two or more.These pigment separately or with the use of, as achromatic pigment, to eliminate green or the violet hue of prepared blackwash, obtain pure blackwash.All pigment is all that those of ordinary skill can well-determined pigment type in the industry, and all can directly purchase from market.
As the preferred technical solution of the present invention, described dispersion agent is sodium polyacrylate salt brine solution, and its solid content is 45%; Described wetting agent is alkylphenol polyoxyethylene, and its solid content is 100%.Described defoamer is mineral oil mixture, and solid content is 100%.Described flow agent is that non-ionic hydrophobic changes surname urethane flow agent, and its solid content is 30%; Described film coalescence aid is 2,2,4-trimethylammonium-1,3-pentanediol mono isobutyrate.
The present invention also provides the preparation method of above-mentioned black solar heat reflection High tailored coating, it is characterized in that: comprise the steps,
Step one, prepare black color paste: black functional pigment and achromatic pigment are joined in part water and mix, then part dispersion agent and wetting agent is added, after dispersed with stirring for some time black color paste, the weight percent of the black functional pigment in black color paste is 30 ~ 50%, achromatic pigment 1 ~ 20%, water 30 ~ 48%, wetting agent and dispersion agent difference 0.1 ~ 1%, place for subsequent use;
Step 2, prepare colourless coating; By remaining dispersion agent, wetting agent and 1/3rd defoamer add dispersed with stirring for some time in part water, add whole ACRYLIC EMULSION afterwards, the defoamer of whole pigment extenders and 1/3rd is added again after dispersed with stirring for some time, add the defoamer of whole film coalescence aid, flow agent and residue 1/3rd after high-speed stirring for some time, after continuing high-speed stirring for some time, add remaining water adjusting viscosity;
Step 3, prepare blackwash: black color paste step one obtained joins in colourless coating prepared by step 2, and black color paste quality accounts for 1 ~ 10% of mixture total mass, after high-speed stirring disperses for some time, and namely black High tailored coating has been prepared.
Compared with prior art, technical superiority of the present invention is:
1, with water-based pure acrylic latex for film forming binder, ageing resistance is good, outdoor long service life, asepsis environment-protecting.
2, select the black light spectral selectivity pigment with higher near-infrared reflection or transmission performance as black functional pigment, outside guarantee paint color, have good cooling effect concurrently.In the black functional paint that the present invention selects, black and the permanent violet of Palio root is weak scattering pigment dyestuff, the two has extremely strong absorption in visible region, but it is very weak near infrared region absorption intensity, Palio root is black not only has fabulous near-infrared reflection performance, and there is excellent light stability and weathering resistance, Palio root is black in pitch-black outward appearance, but with green hue; Permanent violet has very high transmissivity near infrared region, in atropurpureus outward appearance.Therefore, the blackwash be prepared from by the two need add the redness and yellow ultramarine with good near-infrared reflection or transmission performance respectively, as complementary color that is green and purple, to eliminate green hue and violet tint.In addition, ferrochrome is black also has good near-infrared transmission performance with iron illiteracy is black.
3, convenient construction, when being applied to wooden roof and exterior wall, can adopt bottom surface Integral design, coating is thin, once sprays, and when being applied to concrete roof and exterior wall, is aided with Solar reflectance and cooling-down effect that white primer significantly can improve coating.
4, select minimum film-forming temperature and the high pure acrylic latex of second-order transition temperature to make coating have excellent stain resistant, alkali resistance and water tolerance, all have good sticking power to base materials such as concrete, metal, timber, glass.
To sum up, select the black light spectral selectivity pigment with higher near-infrared reflection or transmission performance as black functional pigment, the reflectivity improving its near infrared region improves blackwash Solar reflectance and the most effective method of temperature reduction performance.
Accompanying drawing explanation
Fig. 1 is the black and spectral reflectance curve of black solar heat reflection High tailored coating on white primer (a white basecoat) and aluminium alloy plate (an aluminum alloy plate) prepared by achromatic pigment of Palio root;
Fig. 2 is that permanent violet and the black solar heat reflection High tailored coating prepared by its achromatic pigment are at the spectral reflectance curve on white primer (a white basecoat) and aluminium alloy plate (an aluminum alloy plate).
Embodiment
For making technical scheme of the present invention more clear, below in conjunction with embodiment, black solar heat reflection High tailored coating of the present invention is set forth in more detail.
Embodiment one:
A kind of black solar heat reflection High tailored coating, is characterized in that: its component and weight are:
ACRYLIC EMULSION 40 parts;
Black functional pigment 1 part;
Achromatic pigment 0.1 part;
Pigment extender 10 parts;
Auxiliary agent 1 part;
1 part, water;
The component of described pigment extender and weight are:
Talcum powder 5 parts;
Water-ground limestone 1 part;
1 part, barium sulfate;
Silicon-dioxide 3 parts;
The component of described auxiliary agent and weight are:
Dispersion agent 0.1 part;
Wetting agent 0.1 part;
Defoamer 0.3 part;
Flow agent 0.3 part;
Film coalescence aid 0.2 part.
Embodiment two,
A kind of black solar heat reflection High tailored coating, is characterized in that: its component and weight are:
ACRYLIC EMULSION 50 parts;
Black functional pigment 5 parts;
Achromatic pigment 1 part;
Pigment extender 30 parts;
Auxiliary agent 5 parts;
10 parts, water;
The component of described pigment extender and weight are:
Talcum powder 15 parts;
Water-ground limestone 2 parts;
3 parts, barium sulfate;
Silica 10 part;
The component of described auxiliary agent and weight are:
Dispersion agent 0.9 part;
Wetting agent 1.1 parts;
Defoamer 1.2 parts;
Flow agent 0.8 part
Film coalescence aid 1 part.
Embodiment three,
A kind of black solar heat reflection High tailored coating, is characterized in that: formulated by following raw materials by weight:
ACRYLIC EMULSION 45 parts;
Black functional pigment 3 parts;
Achromatic pigment 0.5 part;
Pigment extender 20 parts;
Auxiliary agent 3 parts;
5 parts, water.
The component of described pigment extender and weight are:
Talcum powder 11 parts;
Water-ground limestone 1.5 parts;
1.5 parts, barium sulfate;
Silicon-dioxide 6 parts;
The component of described auxiliary agent and weight are:
Dispersion agent 0.5 part;
Wetting agent 0.7 part;
Defoamer 0.6 part;
Flow agent 0.7 part;
Film coalescence aid 0.5 part.
Wherein, in three embodiments, the ratio between each adjuvant component can be allocated flexibly, and described ACRYLIC EMULSION is mono-component aqueous pure acrylic latex, and its solid content is 45 ~ 48%, and viscosity is 1 ~ 6 Pas, and pH value is 7.5 ~ 9.5, minimum film-forming temperature 23 DEG C.
Described black functional pigment is in Palio root mineral black, permanent violet pigment, ferrochrome mineral black and ferrimanganic mineral black or two or more.All pigment is all that those of ordinary skill can well-determined pigment in the industry, and all can directly purchase from market.
Described achromatic pigment be ferric oxide yellow pigment, titanium chrome yellow, exterior wall orange pigment, exterior wall red or iron oxide red pigment or two or more.All pigment is all that those of ordinary skill can well-determined pigment in the industry, and all can directly purchase from market.
Described dispersion agent is sodium polyacrylate salt brine solution, and its solid content is 45%; Described wetting agent is alkylphenol polyoxyethylene, and its solid content is 100%.Described defoamer is mineral oil mixture, and solid content is 100%.Described flow agent is that non-ionic hydrophobic changes surname urethane flow agent, and its solid content is 30%; Described film coalescence aid is 2,2,4-trimethylammonium-1,3-pentanediol mono isobutyrate.
Present invention also offers the preparation method of above-mentioned black solar heat reflection High tailored coating, it is characterized in that: comprise the steps,
Step one, prepare black color paste: join in the water of 30 ~ 48% by the black pigment of 30 ~ 50% and the achromatic pigment of 1 ~ 20%, add the dispersion agent of 0.1 ~ 1% and the wetting agent of 0.1 ~ 1%, after dispersed with stirring for some time black color paste, place for subsequent use
Step 2, prepare colourless coating; By remaining dispersion agent, wetting agent and 1/3rd defoamer add dispersed with stirring for some time in part water, add whole ACRYLIC EMULSION afterwards, the defoamer of whole pigment extenders and 1/3rd is added again after dispersed with stirring for some time, add after high-speed stirring for some time whole film coalescence aid, flow agent and 1/3rd defoamer, continue to add remaining water adjusting viscosity after high-speed stirring for some time;
Step 3, prepare blackwash: black color paste step one obtained joins in colourless coating prepared by step 2 with the amount that quality accounts for total coating quality 1 ~ 10%, and after high-speed stirring disperses for some time, namely black High tailored coating has been prepared.
In addition, for verifying the technique effect that black solar heat reflection High tailored coating of the present invention is coated with further, by environmentally friendly for this high-weatherability radiating and cooling applying coating in the aluminium alloy plate of 2 cm × 2 cm and scribble on the aluminium alloy plate of white primer, coat-thickness controls at about 50 μm, as model to be measured after drying and forming-film, ultraviolet ~ visible ray ~ near infrared spectrometer is adopted to measure its spectral reflectivity.Fig. 1 and Fig. 2 is the measurement result that part representative black solar heat reflection High tailored coating is coated with, as the spectral reflectance curve of black solar heat reflection High tailored coating on white primer (a white basecoat) and aluminium alloy plate (an aluminum alloy plate) that Fig. 1 is prepared by the black and achromatic pigment of Palio root, Fig. 2 is that permanent violet and the black solar heat reflection High tailored coating prepared by its achromatic pigment are at the spectral reflectance curve on white primer (a white basecoat) and aluminium alloy plate (an aluminum alloy plate), corresponding spectral reflectivity is listed in table 1 and table 2.Fig. 1, Fig. 2 and table 1, table 2 clearly illustrate that, two kinds of selected blackwashes have extremely strong absorption in visible region, and its visible reflectance is close to the visible reflectance (0.05) of carbon black.Therefore, prepared coating has the outward appearance of black.
According to the requirement of People's Republic of China (PRC) insulating mold coating for construction building industry industry standard JG/T 235-2014, qualified High tailored coating when its lightness L* lower than 40 time, its near infrared reflectivity must be more than or equal to 0.4, can clearly find from table 1 and table 2, being met the requirement of industry standard completely by the black black solar heat reflection High tailored coating prepared with permanent violet of Palio root, is completely qualified black solar heat reflection High tailored coating.
The appraisal procedure of coating temperature reduction performance mainly contains two kinds, and method one is exactly at sunny high noon in summer, below sun coating model being placed on direct projection, measures the surface temperature of coating to be measured; Method 2 adopts American National Standard ASTM 1980 ~ 01, calculates coating surface temperature under the following conditions: intensity of illumination 1000 W/m
2, temperature 37 degree, medium wind speed, convection coefficient 12 W/ (m2K).Table 3 is that the black black solar heat reflection High tailored coating prepared with permanent violet of Palio root compares with the cooling-down effect of carbon black solar heat reflection paint, have in table and can find out, by the black black solar heat reflection High tailored coating prepared with permanent violet of Palio root, there is good cooling-down effect.
It is emphasized that the preferred embodiments after the foregoing is only the present invention optimizes, not in order to limit the present invention, all any amendments, equivalencing and improvement etc. done within the present invention's spirit and principle, all should belong to protection scope of the present invention.
Claims (10)
1. a black solar heat reflection High tailored coating, is characterized in that: its component and weight are:
ACRYLIC EMULSION 40 ~ 50 parts;
Black functional pigment 1 ~ 4 part;
Achromatic pigment 0.1 ~ 1 part;
Pigment extender 10 ~ 30 parts;
Auxiliary agent 0.5 ~ 5 part;
1 ~ 20 part, water.
2. black solar heat reflection High tailored coating according to claim 1, is characterized in that: the component of described pigment extender and weight are:
Talcum powder 5 ~ 15 parts;
Water-ground limestone 1 ~ 2 part;
1 ~ 3 part, barium sulfate;
Silicon-dioxide 5 ~ 10 parts.
3. black solar heat reflection High tailored coating according to claim 1, is characterized in that: the component of described auxiliary agent and weight are:
Dispersion agent 0.1 ~ 1 part;
Wetting agent 0.1 ~ 1 part;
Defoamer 0.1 ~ 1 part;
Flow agent 0.1 ~ 1 part;
Film coalescence aid 0.1 ~ 1 part.
4. black solar heat reflection High tailored coating according to claim 1, it is characterized in that: described ACRYLIC EMULSION is mono-component aqueous pure acrylic latex, its solid content is 45 ~ 48%, and viscosity is 1 ~ 6 Pas, pH value is 7.5 ~ 9.5, minimum film-forming temperature 23 DEG C.
5. black solar heat reflection High tailored coating according to claim 1, is characterized in that: described black functional pigment be that Palio root is black, permanent violet, ferrochrome are black and ferrimanganic black in or two or more.
6. black solar heat reflection High tailored coating according to claim 1, is characterized in that: described achromatic pigment is iron oxide yellow, titanium chrome yellow, exterior wall is orange, exterior wall is red or iron oxide red or two or more.
7. black solar heat reflection High tailored coating according to claim 1, it is characterized in that: described dispersion agent is sodium polyacrylate salt brine solution, its solid content is 45%; Described wetting agent is alkylphenol polyoxyethylene, and its solid content is 100%.
8. black solar heat reflection High tailored coating according to claim 1, it is characterized in that: described defoamer is mineral oil mixture, solid content is 100%.
9. black solar heat reflection High tailored coating according to claim 1, is characterized in that: described flow agent is that non-ionic hydrophobic changes surname urethane flow agent, and its solid content is 30%; Described film coalescence aid is 2,2,4-trimethylammonium-1,3-pentanediol mono isobutyrate.
10. the preparation method of the black solar heat reflection High tailored coating according to claim 1 ~ 9 any one, is characterized in that: comprise the steps,
Step one, prepare black color paste: join in the water of 30 ~ 48% by the black pigment of 30 ~ 50% and the achromatic pigment of 1 ~ 20%, add the dispersion agent of 0.1 ~ 1% and the wetting agent of 0.1 ~ 1%, after dispersed with stirring for some time black color paste, place for subsequent use;
Step 2, prepare colourless coating; By remaining dispersion agent, wetting agent and 1/3rd defoamer add dispersed with stirring for some time in part water, add whole ACRYLIC EMULSION afterwards, the defoamer of whole pigment extenders and 1/3rd is added again after dispersed with stirring for some time, add the defoamer of whole film coalescence aid, flow agent and residue 1/3rd after high-speed stirring for some time, after continuing high-speed stirring for some time, add remaining water adjusting viscosity;
Step 3, prepare blackwash: black color paste step one obtained joins in colourless coating prepared by step 2, and black color paste quality accounts for 1 ~ 10% of mixture total mass, after high-speed stirring disperses for some time, and namely black High tailored coating has been prepared.
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| CN106752544A (en) * | 2017-01-24 | 2017-05-31 | 杭州科翼科技有限公司 | A kind of environmental protection wall surface coating for preventing light pollution |
| CN107286783A (en) * | 2017-06-02 | 2017-10-24 | 河北晨阳工贸集团有限公司 | Diamond Search low cost exterior wall sealing wax |
| CN111205740A (en) * | 2020-03-11 | 2020-05-29 | 泰微新材料科技(山东)有限公司 | Nano ceramic black paint, coating and preparation method thereof |
| CN116042025A (en) * | 2023-01-13 | 2023-05-02 | 苏州赛伍应用技术股份有限公司 | Coating composition, preparation method thereof and high-weather-resistance and high-reflection black solar cell backboard comprising coating composition |
| CN116042025B (en) * | 2023-01-13 | 2024-04-26 | 苏州赛伍应用技术股份有限公司 | Coating composition, preparation method thereof and high-weather-resistance and high-reflection black solar cell backboard comprising coating composition |
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