CN102826810B - Reflective heat-insulation powder coating and preparation method thereof - Google Patents
Reflective heat-insulation powder coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a reflective heat-insulation powder coating and a preparation method thereof. The powder coating is composed of the following components in percentage by mass: 30-70% of inorganic base carrier, 1-6% of organic base carrier, 10-30% of heat-reflecting material, 2-8% of far-infrared radiation material, 5-10% of heat-insulation material, 7-30% of filler and 2-5% of assistant. The invention also relates to a preparation method of the reflective heat-insulation powder coating. The reflective heat-insulation powder coating provided by the invention can be used for lowering the external surface temperature of a construction maintenance structure under solar radiation, and lowering the energy consumption of the construction.
Description
Technical field
The present invention relates to a kind of reflective heat-insulation paint and preparation method thereof, especially relate to a kind of reflective insulation powder coating and preparation method thereof.
Background technology
Building energy conservation is the importance of energy-saving and emission-reduction.Building energy conservation comprises that material of construction is energy-conservation energy-conservation with building use.Reflective heat-insulation paint be realize material of construction energy-conservation with use energy-conservation type material, only need to be coated on outer surface of building, just can intercept more than 90% solar radiation, be the short-cut method of realizing Building Outside Shading of Window.
Sunlight arrives in the ray composition on ground after atmospheric absorption, and ultraviolet ray accounts for 5%, and visible ray accounts for 45%, and infrared rays accounts for 45%, and other electromagnetic radiation energy accounts for 5%.Wherein 95% of infrared energy concentrate in the scope that wavelength is 720-2500nm, near infrared range.Visible ray and infrared rays are all invisible heats, and the object being sunlighted absorbs the visible ray of solar radiation and the energy of infrared light is transformed into heat energy, and the temperature of body surface is raise.When summer, solar radiation was the strongest, outer surface of building temperature can be raised to 70-80 DEG C.The heat energy of the outside surface savings of architectural exterior-protecting construction conducts to indoor by wall, room temperature is raise.Raise in order to resist room temp, adopt air-conditioning temperature-reducing to reach the general measure that indoor comfortable temperature environment is modern architecture.Like this, building energy consumption greatly increases.According to related data statistics, building energy consumption accounts for 30% left and right of social total energy consumption.For reducing the impact of sun heat radiation on building, people have worked out the whole bag of tricks, and wherein, using insulating mold coating for construction coating to carry out external sunshade is method basic, that often adopt.
At present, building coating research and development of products is towards future developments such as Water-borne modification, high solids content, low VOC.As important water-borne coatings kind, emulsion paint due to easy to use, be easy to the features such as toning, water-tolerant, on Building-coating market, occupy absolute share.Because it is dispersion system, solid content is mostly 45%～55%, and all the other are moisture and volatile substances, like this not only bad for packaging and transport, and in this process, also easily causes larger waste.From film forming, the preventing freeze in winter etc. of emulsion, because usually considering, in emulsion paint, generally can add film coalescence aid, ethylene glycol, ammoniacal liquor etc., this becomes the main source of its VOC, causes environmental pollution.That Dry Powder Architectural Paint has is convenient for production, zero VOC, be convenient to the advantages such as packaging, transport, obtains gradually the attention of building trade.But Dry Powder Architectural Paint adopts PVOH series products as main film forming substance mostly, product mainly contains porcelain-imitated coating, inner wall putty etc., the general low gradeization of this series products, and its water tolerance, weathering resistance are poor, can not adapt to the requirement of decoration of exterior wall.
Existing reflective heat-insulation paint is the coating of solvent-borne type and water-based, does not also have the reflective heat-insulation paint of pulverulence to be applied to the heat insulation of architectural exterior-protecting construction.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of heat reflectivity to sun heat radiation be greater than 80% and self thermal emissivity rate be greater than reflective insulation powder coating of 80% and preparation method thereof.
The present invention solves its technical problem and adopts technical scheme to be:
The present invention's reflective insulation powder coating, formed by powder coating underlying carrier, heat-reflecting material, far-infrared radiation material, heat-barrier material, filler and auxiliary agent, described powder coating underlying carrier is divided into inorganic underlying carrier and organic underlying carrier, wherein the mass percent of inorganic underlying carrier is 30～70%(preferably 35～65%), the mass percent of organic underlying carrier is 1～6%(preferably 2～5%); The mass percent of described heat-reflecting material is 10～30%(preferably 15～25%), mass percent 2～the 8%(of described far-infrared radiation material preferably 3～5%), the mass percent of described heat-barrier material is the preferred 6-8% of 5～10%(), the mass percent of described filler is the preferred 10-25% of 7～30%(), the mass percent 2～5% of described auxiliary agent; Described each component proportion sum is 100%.
Further, described inorganic carrier can be ordinary Portland cement or silicate white cement (preferably silicate white cement); Described organic carrier can be PVA rubber powder, polyvinyl acetate-ethene rubber powder (EVA rubber powder) or polyacrylic ester rubber powder (optimization polypropylene acid esters rubber powder).
Further, described heat-reflecting material can be titanium dioxide or coated by titanium dioxide mica; Described far-infrared radiation material is far infrared transmission powder (the far infrared transmission powder of preferred emission rate >=90%); Described heat-barrier material is the micro-sphere material (preferable particle size is hollow glass microballoon or the ceramic microspheres of 30～50 microns) of hollow.
Further, described filler can be one or more mixture (the preferably mixture of kaolin, calcium carbonate and mica powder in kaolin, calcium carbonate, mica powder, wherein kaolinic quality is 1～10% of reflective insulation powder coating total mass, the quality of described calcium carbonate is 2～10% of reflective insulation powder coating total mass, the quality of mica powder be reflective insulation powder coating total mass 2～12%).
Further, described auxiliary agent comprises wetting Agent for Printing Inks, anti-fissuring agent and defoamer, and the quality of described wetting Agent for Printing Inks is the 0.5-2% of reflective insulation powder coating total mass; The quality of described anti-fissuring agent is the 0.5-1% of reflective insulation powder coating total mass; The quality of described defoamer is the 0.2-0.5% of reflective insulation powder coating total mass.(described wetting Agent for Printing Inks preferred cellulose ethers, the preferred lignocellulose of described anti-fissuring agent.）
The preparation method of the present invention's reflective insulation powder coating, after dispersed with stirring opening of device, first add successively powder coating underlying carrier, filler, auxiliary agent by predetermined quality proportioning, after stirring, add successively heat-reflecting material, far-infrared radiation material, heat-barrier material by predetermined quality proportioning again, after mixing, sieve, packaging.
The present invention's reflective insulation powder coating, powder coating underlying carrier used is binding material, is the carrier of heat-reflecting material, far-infrared radiation material, heat-barrier material, filler and auxiliary agent.Wherein, inorganic carrier is the main body of powder coating underlying carrier, and being becomes coating by the chemical reaction of filmogen to become membrane structure.Organic carrier is mainly aqueous dispersion polymers rubber powder, and rubber powder becomes latex under the effect of water, plays a part identical with emulsion resin in conventional coating.Aqueous dispersion polymers rubber powder is the film forming subsidiary material matter of powder coating, and its Main Function is to provide coating and the film-forming properties at powder coating initial stage; The simultaneously snappiness of the molecular chain of polymer glue powder, can solve rigidity and the fragility of inorganic carrier film, makes the powder coating of preparation have the film properties of inorganic-organic interpenetrating(polymer)networks.Water-fast and the weathering resistance consideration requiring from exterior coating, the present invention preferentially selects polyacrylic ester latex powder.
Heat-reflecting material used, far-infrared radiation material and heat-barrier material are main heat-insulation functional material.In heat-reflecting material, titanium dioxide is the effective material of heat reflection; The flats particulate (representational is coated by titanium dioxide mica) of the coated by titanium dioxide in Chinese patent ZL200910303077.5, heat reflection better effects if.The heat-reflecting material that the present invention adopts is preferentially selected titanium dioxide, this bi-material of coated by titanium dioxide mica.In far-infrared radiation material, there is polytype material, the far infrared transmissivity of conventional far infrared transmission powder reaches more than 85%, and the present invention is the far infrared transmission powder of commercially available emittance >=90% preferably.The price of considering far-infrared radiation material is higher, and when far-infrared radiation material consumption is the 2-8% of reflective insulation powder coating total mass, cost performance is best.What heat-barrier material used in the present invention is hollow microsphere, leans on the low thermal conductivity of the gas of microballoon hollow space to realize the effect of heat insulation of dope layer; The particle diameter of conventional hollow microsphere is 2-200 micron.Consider from effect of heat insulation, it is that the hollow glass microballoon, ceramic microspheres of 30-50 micron is as heat rejection material that the present invention preferentially selects particle diameter.
The Main Function of filler used is the volume that increases film, some performance that reduces costs and improve coating.Though the heat reflection efficiency of calcium carbonate is lower, but radiation efficiency is higher.Kaolin is the surrogate of white pigment, can also increase the suspension of particle particle in coating.It is filler that the present invention selects calcium carbonate, kaolin, its low price, and the heat reflection on film and thermal radiation effect impact are little.In order to improve the coating of film, the impermeability of increase film, in the present invention, add the functional stuffing of the sheet of mica group.Sheet physical structure and the chemical structure of mica powder play outside the compactness and water-repellancy of film in coating, also have the feature that thermal conductivity is little, and in the present invention, mica powder uses as a kind of densification, waterproof, the heat insulation special filler of coating.
Adjuvant used wetting Agent for Printing Inks, anti-fissuring agent and the defoamer of comprising.Wetting Agent for Printing Inks Main Function is the moisture keeping within a certain period of time in film, provides the inorganic substrates such as cement to carry out the use of hydration reaction.The present invention's wetting Agent for Printing Inks used is cellulose ethers, after cellulose ethers disperses or dissolves in water, because the active function of the polar group of its cellulose ether chain is adsorbed on gelling material particle surface, the powdered material particle in coating is uniformly dispersed effectively.Ether of cellulose, except as wetting Agent for Printing Inks, also plays the effect of dispersion agent.Ether of cellulose is as a kind of protective colloid, and " parcel " lives solid particulate, and forms one deck lubricant film at its outside surface, makes cement and inorganic material particles system more stable, can improve powder coating in the mobility of whipping process and the slipping of construction.Ether of cellulose solution, due to self molecule high-hydroscopicity constructional feature, makes not volatile the losing of moisture in powder coating slurry, and progressively discharges within long period of time, gives water-retentivity that powder coating slurry is good and can application operability.Adopt fiber ether element class wetting Agent for Printing Inks, anti-splashing property when also coating being had thickening effectiveness and prevents from being coated with.The present invention's ether of cellulose used can be selected hydroxyethylmethyl-cellulose ether, hydroxypropyl methyl cellulose ether.The present invention's anti-fissuring agent used can be lignocellulose, and lignocellulose is the fiber of one dimension form, and what lignocellulose was unordered is dispersed in coating, in film process, between lignocellulose molecular chain, forms three-dimensional structure.Lignocellulose, for powder coating of the present invention, improves the anti-settling property of coating and the scrub performance of film and prevents film cracking.Defoamer is to bubble to preventing in powder coating whipping process, makes the auxiliary agent of the finer and close light of powder coating coating.
Another kind of technical scheme: a kind of reflective insulation powder coating is made up of reflective insulation powder coating A component, reflective insulation aqueous overcoating coating B component two portions; Wherein, the composition of reflective insulation powder coating A component is identical with the composition of above-mentioned reflective insulation powder coating, and reflective insulation aqueous overcoating coating B component is made up of polymer emulsion resin, heat-reflecting material, far-infrared radiation material, filler, auxiliary agent and water.
Further, in described reflective insulation aqueous overcoating coating B component, the mass percent of polymer emulsion resin is the preferred 30-40% of 20-50%(), the mass percent of heat-reflecting material is 10～30%, the mass percent 2～8% of far-infrared radiation material, the mass percent 0-15% of filler, the mass percent of auxiliary agent is 3-5%; The mass percent of water is 20-40%; Described each component proportion sum is 100%.
Further, described polymer emulsion resin can be polyacrylate(s) emulsion, organosilicon modified crylic acid resin emulsion or fluorocarbon resin emulsion etc.
Further, described heat-reflecting material can be titanium dioxide or coated by titanium dioxide mica; Described far-infrared radiation material is far infrared transmission powder, the far infrared transmission powder of preferred emission rate >=90%.
Further, described auxiliary agent comprises dispersion agent, defoamer, sanitas, film coalescence aid and thickening material; The quality of described dispersion agent is the 0.1-0.4% of reflective insulation aqueous overcoating coating B component total mass, the quality of described defoamer is the 0.1-0.3% of reflective insulation aqueous overcoating coating B component total mass, the quality of described sanitas is the 0.05-0.2% of reflective insulation aqueous overcoating coating B component total mass, the quality of described film coalescence aid is the 0.5-6% of reflective insulation aqueous overcoating coating B component total mass, and the quality of described thickening material is the 0.5-2% of reflective insulation aqueous overcoating coating B component total mass.
The preparation method of described reflective insulation aqueous overcoating coating B component, first in paint production plant, add the water of metering by predetermined quality proportioning, then add successively dispersion agent, defoamer, the sanitas of metering by predetermined quality proportioning, after dispersed with stirring is even, add successively filler, heat-reflecting material, far-infrared radiation material, film coalescence aid by predetermined quality proportioning again, after dispersed with stirring 30 minutes, finally under agitation add successively polymer emulsion resin, thickening material by predetermined quality proportioning, filter, pack.
The Main Function of described reflective insulation aqueous overcoating coating B component is the surface property that strengthens reflective insulation powder coating A component of the present invention, as the smooth finish on raising paint film surface, water tolerance, resistance to staining property etc.
The present invention's reflective insulation powder coating is a kind of for reducing hull-skin temperature under building maintenance structure solar radiation, reduces the novel material of building energy consumption.Wherein, reflective insulation powder coating A component is the dry mash that single component is used, add water and stir into coating state and coat building external envelope structure, coating film forming after moisture evaporation, prepared paint film has outside the characteristic of building external paint, also there is higher reflected solar radiation heat and the effects of reduced temperature of the high-heating radiation of self, effectively reduce the air conditioning energy consumption of outer surface of building temperature and minimizing room temperature lowering.For higher film densification, water-fast, the resistance to effect that stains, can with reflective insulation aqueous overcoating coating B component compound use.
Using method:
Reflective insulation powder coating A component is used separately, first according to material powder: water=100:(40-60) the ratio modulation that adds water, after stirring with electric mixer, then stir 8-15 minute, finally water is adjusted to working viscosity, can be coated with construction.When construction, can adopt the constructional method constructions such as spraying, roller coating, brushing, blade coating.Construct thickness as required, the general thick effect of heat insulation just having had of 0.2-3mm.When construction, require to adopt the method for multipass construction to meet the requirements of thickness according to coat-thickness.
Reflective insulation powder coating A component and reflective insulation aqueous overcoating coating B component support the use, and after the sclerosis of reflective insulation powder coating coating, film coated surface are polished flat, and can be coated with reflective insulation aqueous overcoating coating B component.Reflective insulation powder coating B component of the present invention is according to general exterior coating constructional method construction.Reflective insulation aqueous overcoating coating B component coating pass can be coated with one to two time as required, and coating thickness 0.1-0.15mm has the film effects such as good film compactness, water tolerance, resistance to staining property.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1-4
Each composition material mixture ratio (mass percent) of the reflective insulation powder coating of embodiment 1-4 is in table 1.
Each composition material mixture ratio (mass percent) of table 1 reflective insulation powder coating
The preparation of the reflective insulation powder coating of embodiment 1-4: after dispersed with stirring opening of device, add successively powder coating underlying carrier silicate white cement, polyacrylic ester rubber powder by predetermined quality proportioning, filler kaolin, mica powder, calcium carbonate powders, auxiliary agent lignocellulose, hydroxypropyl methyl cellulose ether, defoamer, after stirring, add successively heat-reflecting material titanium dioxide or coated by titanium dioxide mica, far-infrared radiation material far infrared transmission powder, heat-barrier material hollow glass microballoon by predetermined quality proportioning again, after mixing, sieve, packaging.
The far infrared transmission powder that described far infrared transmission powder is emittance 90%; Described hollow glass microballoon is the hollow glass microballoon of 40 microns of median sizes, certainly also can adopt the ceramic microspheres of 40 microns of median sizes.
Using method: first according to powder: the modulation that adds water of water=100:50 ratio, after stirring with electric mixer, then stir 10 minutes, finally water is adjusted to working viscosity, can be coated with construction.When construction, adopt the mode of roller coating to construct, construction thickness is that 2mm is thick.Certainly, also can adopt the alternate manners such as spraying, brushing, blade coating to construct.
The evaluation of effect of heat insulation: the heat reflectivity that evaluation index is film and thermal emissivity rate, detection method is according to GB/T 25261-2010 " reflective heat-insulation paint for building " standard.The effect of heat insulation of the reflective insulation powder coating of embodiment 1-4 is in table 2.
The effect of heat insulation of table 2 reflective insulation powder coating
Embodiment 5-8
The reflective insulation powder coating of embodiment 5-8 is made up of reflective insulation powder coating A component, reflective insulation aqueous overcoating coating B component two portions; Wherein, each composition proportion (mass percent) of reflective insulation powder coating A component is in table 3, and each composition proportion (mass percent) of reflective insulation aqueous overcoating coating B component is in table 4.
Each composition material mixture ratio (mass percent) of table 3 reflective insulation powder coating A component
Table 4 reflective insulation powder coating aqueous overcoating coating B component proportion (mass percent)
In embodiment 5-8, the preparation of reflective insulation powder coating A component is with embodiment 1-4.
The preparation of reflective insulation aqueous overcoating coating B component in embodiment 5-8, first in paint production plant, add the water of metering by predetermined quality proportioning, then add successively dispersion agent, silicone antifoam agent, the sanitas of metering by predetermined quality proportioning, after dispersed with stirring is even, add successively titanium dioxide or coated by titanium dioxide mica powder, kaolin, far infrared transmission powder, film coalescence aid by predetermined quality proportioning again, disperse after 30 minutes, finally under agitation add successively acrylic ester emulsion resin, thickening material by predetermined quality proportioning, filter, pack.
Using method: first prepare reflective insulation powder coating A component slurry, according to material powder: the modulation that adds water of water=100:50 ratio, after stirring with electric mixer, then stir 10 minutes, finally water is adjusted to working viscosity, can be coated with construction.When construction, adopt the mode of roller coating to construct, construction thickness is that 2mm is thick.Certainly, also can adopt the alternate manners such as spraying, brushing, blade coating to construct.After reflective insulation powder coating dried coating film, (generally need 24-48 hour), polish, according to the constructional method coating reflective insulation water-borne coatings painting coating B component of water-borne coatings, adopt the method constructions such as roller coating, spraying, coating thickness 0.1-0.15mm again.
The evaluation of film performance: the heat reflectivity that evaluation index is film and thermal emissivity rate, resistance to staining property, water tolerance, smooth finish.The detection method of heat reflectivity and thermal emissivity rate is according to GB/T 25261-2010 " reflective heat-insulation paint for building " standard; Resistance to staining property, water tolerance are according to GB/T 9755-2001 " synthetic emulsion exterior wall paint " standard detection; Smooth finish adopts feel and visual method.
Table 5 is reflective insulation powder coating embodiment 1, embodiment 4, and the film properties contrast table of embodiment 5, embodiment 8.As can be seen from Table 5: adopted after reflective insulation aqueous overcoating coating, the effect of heat insulation of film and resistance to staining property, water tolerance are all improved, and smooth finish is also better.
Table 5 reflective insulation powder coating and aqueous overcoating coating compound coating net effect
Claims (9)
1. a reflective insulation powder coating, it is characterized in that: formed by powder coating underlying carrier, heat-reflecting material, far-infrared radiation material, heat-barrier material, filler and auxiliary agent, described powder coating underlying carrier is divided into inorganic underlying carrier and organic underlying carrier, wherein the mass percent of inorganic underlying carrier is 30～70%, and the mass percent of organic underlying carrier is 2～5%; The mass percent of described heat-reflecting material is 10～30%, the mass percent 2～8% of described far-infrared radiation material, the mass percent of described heat-barrier material is 5～10%, and the mass percent of described filler is 7～30%, and the mass percent of described auxiliary agent is 2～5%; Described each component proportion sum is 100%;
Described auxiliary agent comprises wetting Agent for Printing Inks, anti-fissuring agent and defoamer, and the quality of described wetting Agent for Printing Inks is the 0.5-2% of reflective insulation powder coating total mass; The quality of described anti-fissuring agent is the 0.5-1% of reflective insulation powder coating total mass; The quality of described defoamer is the 0.2-0.5% of reflective insulation powder coating total mass.
2. reflective insulation powder coating according to claim 1, is characterized in that: described inorganic underlying carrier is ordinary Portland cement or silicate white cement; Described organic underlying carrier is PVA rubber powder, polyvinyl acetate-ethene rubber powder or polyacrylic ester rubber powder.
3. reflective insulation powder coating according to claim 1 and 2, it is characterized in that: described heat-reflecting material is titanium dioxide or coated by titanium dioxide mica, described far-infrared radiation material is far infrared transmission powder, the micro-sphere material that described heat-barrier material is hollow.
4. reflective insulation powder coating according to claim 1 and 2, is characterized in that: described filler is one or more the mixture in kaolin, calcium carbonate, mica powder.
5. the preparation method of reflective insulation powder coating described in a claim 1, it is characterized in that: after dispersed with stirring opening of device, first add successively powder coating underlying carrier, filler, auxiliary agent by predetermined quality proportioning, after stirring, add successively heat-reflecting material, far-infrared radiation material, heat-barrier material by predetermined quality proportioning again, after mixing, sieve, packaging.
6. a reflective insulation powder coating, is characterized in that: be made up of reflective insulation powder coating A component, reflective insulation aqueous overcoating coating B component two portions; Wherein, the composition of reflective insulation powder coating A component is identical with the composition of reflective insulation powder coating described in claim 1, and reflective insulation aqueous overcoating coating B component is made up of polymer emulsion resin, heat-reflecting material, far-infrared radiation material, filler, auxiliary agent and water.
7. reflective insulation powder coating according to claim 6, it is characterized in that: in described reflective insulation aqueous overcoating coating B component, the mass percent of polymer emulsion resin is 20-50%, the mass percent of heat-reflecting material is 10～30%, the mass percent 2～8% of far-infrared radiation material, the mass percent 0-15% of filler, the mass percent of auxiliary agent is 3-5%, the mass percent of water is 20-40%; Described each component proportion sum is 100%.
8. according to the reflective insulation powder coating described in claim 6 or 7, it is characterized in that: described polymer emulsion resin is polyacrylate(s) emulsion, organosilicon modified crylic acid resin emulsion or fluorocarbon resin emulsion.
9. according to the reflective insulation powder coating described in claim 6 or 7, it is characterized in that: described heat-reflecting material is titanium dioxide or coated by titanium dioxide mica; Described far-infrared radiation material is far infrared transmission powder.
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| CN104496328A (en) * | 2014-12-31 | 2015-04-08 | 上海墙特节能材料有限公司 | Inorganic dry powder reflective heat insulating coating |
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| CN111976053A (en) * | 2020-08-13 | 2020-11-24 | 北京圣劳伦斯散热器制造有限公司 | Fluorocarbon paint anticorrosive coating inside and outside radiator and production equipment |
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