CN102826810A - 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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- CN102826810A CN102826810A CN2012103617377A CN201210361737A CN102826810A CN 102826810 A CN102826810 A CN 102826810A CN 2012103617377 A CN2012103617377 A CN 2012103617377A CN 201210361737 A CN201210361737 A CN 201210361737A CN 102826810 A CN102826810 A CN 102826810A
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 7
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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 the building use.Reflective heat-insulation paint be realize material of construction energy-conservation with use energy-conservation type material, only need be coated on outer surface of building, just can intercept the solar radiation 90% or more, be the short-cut method that external sunshade is built in realization.
Sunshine arrives in the ray composition on ground through atmospheric absorption back, and ultraviolet ray accounts for 5%, and visible light 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, promptly in the near infrared range.Visible light and infrared rays all are invisible heats, are transformed into heat energy by the visible light of the object of solar light irradiation absorption solar radiation and the energy of infrared light, and the temperature of body surface is raise.When the solar radiation in summer was the strongest, the outer surface of building temperature can be raised to 70-80 ℃.The heat energy of the outside surface savings of architectural exterior-protecting construction conducts to indoor through 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 a modern architecture.Like this, building energy consumption greatly increases.According to the related data statistics, about 30% of building energy consumption account society total energy consumption.For reducing the influence of sun heat radiation to building, people have worked out the whole bag of tricks, and wherein, using the insulating mold coating for construction coating to carry out external sunshade is method basic, that often adopt.
At present, the trade sales coating research and development of products develops towards directions such as Water-borne modification, high solids content, low VOC.As important water-borne coatings kind, rubber-emulsion paint because easy to use, be easy to characteristics such as toning, water-tolerant, on trade sales coating market, occupy absolute share.Because it is a dispersion system, solid content is mostly 45%～55%, and all the other are moisture and easy volatile material, like this not only bad for packing and transportation, and in this process, also is prone to cause bigger waste.Consider that from factors such as the film forming of emulsion, preventing freeze in winter generally can add film coalescence aid, terepthaloyl moietie, ammoniacal liquor etc. in the rubber-emulsion paint, this becomes the main source of its VOC, causes environmental pollution.That the dry powder trade sales coating has is convenient for production, zero VOC, be convenient to advantages such as packing, transportation, obtains the attention of building trade gradually.Yet the dry powder trade sales coating mostly adopts and gathers ethanol product as main film forming substance, and 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 greater than 80% with self thermal emissivity rate 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; Form by powder coating underlying carrier, heat-reflecting material, far-infrared radiation material, heat-barrier material, filler and auxiliary agent; Said 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% (preferred 35～65%), and the mass percent of organic underlying carrier is 1～6% (preferred 2～5%); The mass percent of said heat-reflecting material is 10～30% (preferred 15～25%); The mass percent 2～8% of said far-infrared radiation material (preferred 3～5%); The mass percent of said heat-barrier material is 5～10% (preferred 6-8%); The mass percent of said filler is 7～30% (preferred 10-25%), the mass percent 2～5% of said auxiliary agent; Said each set of dispense is 100% than sum.
Further, said inorganic carrier can be ordinary Portland cement or silicate white cement (preferred silicate white cement); Said organic carrier can be PVA rubber powder, Yodo Sol VC 400-ethene rubber powder (EVA rubber powder) or polyacrylic ester rubber powder (optimization polypropylene acid esters rubber powder).
Further, said heat-reflecting material can be titanium oxide or coated by titanium dioxide mica; Said far-infrared radiation material is far infrared emission powder (the far infrared emission powder of preferred emission rate >=90%); Said heat-barrier material is the micro-sphere material (preferable particle size is 30～50 microns hollow glass microballoon or a ceramic microspheres) of hollow.
Further; Said filler can be one or more the mixture (mixture of preferred kaolin, lime carbonate and mica powder in kaolin, lime carbonate, the mica powder; Wherein kaolinic quality is 1～10% of a reflective insulation powder coating total mass; The quality of said lime carbonate is 2～10% of a reflective insulation powder coating total mass, the quality of mica powder be reflective insulation powder coating total mass 2～12%).
Further, said auxiliary agent comprises wetting Agent for Printing Inks, anti-fissuring agent and skimmer, and the quality of said wetting Agent for Printing Inks is the 0.5-2% of reflective insulation powder coating total mass; The quality of said anti-fissuring agent is the 0.5-1% of reflective insulation powder coating total mass; The quality of said skimmer is the 0.2-0.5% of reflective insulation powder coating total mass.(said wetting Agent for Printing Inks preferred cellulose ethers, the preferred lignocellulose of said anti-fissuring agent.）
The preparation method of the present invention's reflective insulation powder coating; Behind the dispersed with stirring opening of device, add powder coating underlying carrier, filler, auxiliary agent successively by the predetermined quality proportioning earlier, after stirring; Add heat-reflecting material, far-infrared radiation material, heat-barrier material successively by the predetermined quality proportioning again; Behind the mixing, sieve packing.
The present invention's reflective insulation powder coating, used powder coating underlying carrier is a bond, 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, is to lean on the chemical reaction of filmogen to become coating to become membrane structure.Organic carrier mainly is the aqueous dispersion polymers rubber powder, and rubber powder becomes latex under the effect of water, play a part with conventional coating in emulsion resin identical.The aqueous dispersion polymers rubber powder is the film forming subsidiary material matter of powder coating, and it mainly acts on coating and the film-forming properties that provides the powder coating initial stage; Simultaneously the snappiness of the molecular chain of polymer glue powder can solve rigidity and fragility that inorganic carrier is filmed, makes the powder coating of preparation have the film properties of inorganic-organic interpenetrating(polymer)networks.Consider that from the water-fast and weathering resistance that exterior coating requires the present invention preferentially selects the polyacrylic ester latex powder for use.
Used heat-reflecting material, far-infrared radiation material and heat-barrier material are main heat insulating function material.In heat-reflecting material, titanium oxide is the effective material of heat reflection; The flats particulate of the coated by titanium dioxide among the Chinese patent ZL200910303077.5 (representational is the coated by titanium dioxide mica), the heat reflection better effects if.The heat-reflecting material that the present invention adopts is preferentially selected titanium oxide, these two kinds of materials of coated by titanium dioxide mica for use.In far-infrared radiation material, numerous types of materials has been arranged, the far infrared transmissivity of far infrared emission powder commonly used reaches more than 85%, the far infrared emission powder of emittance >=90% that the present invention is preferred commercially available.The price of considering far-infrared radiation material is higher, and cost performance was best when the far-infrared radiation material consumption was the 2-8% of reflective insulation powder coating total mass.Heat-barrier material uses 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 the 2-200 micron.Consider that from effect of heat insulation it is that the hollow glass microballoon, ceramic microspheres of 30-50 micron is as heat rejection property material that the present invention preferentially selects particle diameter for use.
The main effect of used filler is some performance that increases the volume film, reduces cost and improve coating.Though the heat reflection efficient of lime carbonate is lower, but radiation efficiency is higher.Kaolin is the surrogate of white pigment, can also increase the suspension of particle particle in the coating.It is filler that the present invention selects lime carbonate, kaolin for use, and its low price is little to the heat reflection and the thermal radiation effect influence of filming.In order to improve the coating of filming, the impermeability that increase is filmed, add the flaky functional stuffing of mica group among the present invention.The sheet physical structure and the chemical structure of mica powder play in coating outside the compactness and water-repellancy of filming, and also have the little characteristics of thermal conductivity, and mica powder uses as a kind of densification, waterproof, the heat insulation special filler of coating among the present invention.
Adjuvant used wetting Agent for Printing Inks, anti-fissuring agent and the skimmer of comprising.It is the moisture in keeping within a certain period of time filming that wetting Agent for Printing Inks mainly acts on, and provides inorganic substrates such as cement to carry out the usefulness of hydration reaction.The used wetting Agent for Printing Inks of the present invention is a 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 the gelling material particle surface, the powdered material particle in the coating is uniformly dispersed effectively.Ether of cellulose also plays the effect of dispersion agent except as the wetting Agent for Printing Inks.Ether of cellulose is as a kind of protective colloid, and " parcel " lived 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 flowability of whipping process and the smooth property of construction.Ether of cellulose solution is because self molecule high-hydroscopicity constructional feature makes not volatile the losing of moisture in the powder coating slurry, and progressively release in long period of time, gives good water-retentivity of powder coating slurry and constructing operation property.Adopt the plain type wetting Agent for Printing Inks of fiber ether, also coating is had thickening effectiveness and anti-splashing property when preventing to be coated with.The used ether of cellulose of the present invention can be selected hydroxyethylmethyl-cellulose ether, hydroxypropyl methyl cellulose ether for use.The used anti-fissuring agent of the present invention can be lignocellulose, and lignocellulose is the fiber of one dimension form, and what lignocellulose was unordered is dispersed in the coating, in film process, forms three-dimensional structure between the lignocellulose molecular chain.Lignocellulose is used for powder coating of the present invention, improves the scrub performance of preventing heavy property and film of coating and prevents film cracking.Skimmer is to bubble to preventing in the powder coating whipping process, makes the auxiliary agent of the fine and close more 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 the said reflective insulation aqueous overcoating coating B component; The mass percent of polymer emulsion resin is 20-50% (preferred 30-40%), and 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%; Said each set of dispense is 100% than sum.
Further, said polymer emulsion resin can be polyacrylate(s) emulsion, organosilicon modified crylic acid resin emulsion or fluorocarbon resin emulsion etc.
Further, said heat-reflecting material can be titanium oxide or coated by titanium dioxide mica; Said far-infrared radiation material is a far infrared emission powder, the far infrared emission powder of preferred emission rate >=90%.
Further, said auxiliary agent comprises dispersion agent, skimmer, sanitas, film coalescence aid and thickening material; The quality of said dispersion agent is the 0.1-0.4% of reflective insulation aqueous overcoating coating B component total mass; The quality of said skimmer is the 0.1-0.3% of reflective insulation aqueous overcoating coating B component total mass; The quality of said sanitas is the 0.05-0.2% of reflective insulation aqueous overcoating coating B component total mass; The quality of said film coalescence aid is the 0.5-6% of reflective insulation aqueous overcoating coating B component total mass, and the quality of said thickening material is the 0.5-2% of reflective insulation aqueous overcoating coating B component total mass.
The preparation method of said reflective insulation aqueous overcoating coating B component; Press earlier the predetermined quality proportioning adds metering in paint production plant water; The dispersion agent, skimmer, the sanitas that add metering then by the predetermined quality proportioning successively; After dispersed with stirring is even, add filler, heat-reflecting material, far-infrared radiation material, film coalescence aid successively by the predetermined quality proportioning again, dispersed with stirring is after 30 minutes; Under agitation add polymer emulsion resin, thickening material successively at last, filter, pack by the predetermined quality proportioning.
The main effect of said reflective insulation aqueous overcoating coating B component is the surface property that strengthens reflective insulation powder coating A component of the present invention, as improving the surperficial smooth finish of paint film, water tolerance, anti-staining property etc.
The present invention's reflective insulation powder coating is a kind of hull-skin temperature under the building maintenance structure solar radiation that is used to reduce, and 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 the coating state and coat building external envelope structure, coating film forming behind the moisture evaporation, the prepared coating film has outside the characteristic of building external paint; Also have the 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 fine and close, water-fast, the anti-effect that stains of filming, can with the compound use of reflective insulation aqueous overcoating coating B component.
Method of use:
Reflective insulation powder coating A component is used separately, and earlier according to the material powder: water=100: (40-60) ratio adds the water modulation, and after stirring with electric mixer, restir 8-15 minute, last water was adjusted to working viscosity, can be coated with construction.Can adopt constructional method constructions such as spraying, roller coating, brushing, blade coating during construction.Construction thickness as required, general 0.2-3mm is thick just to have good effect of heat insulation.Require to adopt the method for multipass construction to meet the requirements of thickness according to coat-thickness during construction.
Reflective insulation powder coating A component and the supporting use of reflective insulation aqueous overcoating coating B component after the sclerosis of reflective insulation powder coating coating, polish flat film coated surface, 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 promptly has the effects of filming such as compactness, water tolerance, anti-staining property of filming preferably.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment 1-4
Each composition material mixture ratio (mass percent) of the reflective insulation powder coating of embodiment 1-4 is seen 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: behind the dispersed with stirring opening of device; Add powder coating underlying carrier silicate white cement, polyacrylic ester rubber powder successively by the predetermined quality proportioning; Filler kaolin, mica powder, calcium carbonate powders; Auxiliary agent lignocellulose, hydroxypropyl methyl cellulose ether, skimmer after stirring, add heat-reflecting material titanium oxide or coated by titanium dioxide mica, far-infrared radiation material far infrared emission powder, heat-barrier material hollow glass microballoon by the predetermined quality proportioning more successively; Sieve packing behind the mixing.
The far infrared emission powder that said far infrared emission powder is an emittance 90%; Said hollow glass microballoon is the hollow glass microballoon of 40 microns of median sizes, also can adopt the ceramic microspheres of 40 microns of median sizes certainly.
Method of use: earlier according to powder: water=100:50 ratio adds the water modulation, after stirring with electric mixer, and restir 10 minutes, last water is adjusted to working viscosity, can be coated with construction.During construction, adopt the mode of roller coating to construct, construction thickness is that 2mm is thick.Certainly, also can adopt alternate manners such as spraying, brushing, blade coating to construct.
The evaluation of effect of heat insulation: evaluation index is the heat reflectivity and the thermal emissivity rate of filming, and 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 seen 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 seen table 3, and each composition proportion (mass percent) of reflective insulation aqueous overcoating coating B component is seen 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 set of dispense is than (mass percent)
The preparation of reflective insulation powder coating A component is with embodiment 1-4 among the embodiment 5-8.
The preparation of reflective insulation aqueous overcoating coating B component among the embodiment 5-8; Press earlier the predetermined quality proportioning adds metering in paint production plant water; The dispersion agent, silicone antifoam agent, the sanitas that add metering then by the predetermined quality proportioning successively; Dispersed with stirring evenly after, add titanium oxide or coated by titanium dioxide mica powder, kaolin, far infrared emission powder, film coalescence aid successively by the predetermined quality proportioning again, disperse after 30 minutes; Under agitation add acrylic ester emulsion resin, thickening material successively at last, filter, pack by the predetermined quality proportioning.
Method of use: the powder coating of preparation reflective insulation earlier A component slurry, according to expecting powder: water=100:50 ratio adds the water modulation, after stirring with electric mixer, restir 10 minutes, last water is adjusted to working viscosity, can be coated with construction.During construction, adopt the mode of roller coating to construct, construction thickness is that 2mm is thick.Certainly, also can adopt alternate manners such as spraying, brushing, blade coating to construct.Treat (generally needing 24-48 hour) behind the reflective insulation powder coating dried coating film; Polish; According to the constructional method coating reflective insulation water-borne coatings painting coating B component of water-borne coatings, adopt method constructions such as roller coating, spraying, coating thickness 0.1-0.15mm again.
The evaluation of film performance: evaluation index is the heat reflectivity of filming and thermal emissivity rate, anti-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; Anti-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, reaches the film properties contrast table of embodiment 5, embodiment 8.Can find out from table 5: after having adopted reflective insulation aqueous overcoating coating, the effect of heat insulation of film and anti-staining property, water tolerance all have raising, and smooth finish is also better.
Table 5 reflective insulation powder coating and aqueous overcoating coating compound coating net effect
Claims (10)
1. reflective insulation powder coating; It is characterized in that: form by powder coating underlying carrier, heat-reflecting material, far-infrared radiation material, heat-barrier material, filler and auxiliary agent; Said 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 1～6%; The mass percent of said heat-reflecting material is 10～30%; The mass percent 2～8% of said far-infrared radiation material; The mass percent of said heat-barrier material is 5～10%, and the mass percent of said filler is 7～30%, and the mass percent of said auxiliary agent is 2～5%; Said each set of dispense is 100% than sum.
2. reflective insulation powder coating according to claim 1 is characterized in that: said inorganic carrier is ordinary Portland cement or silicate white cement; Said organic carrier is PVA rubber powder, Yodo Sol VC 400-ethene rubber powder or polyacrylic ester rubber powder.
3. reflective insulation powder coating according to claim 1 and 2; It is characterized in that: said heat-reflecting material is titanium oxide or coated by titanium dioxide mica; Said far-infrared radiation material is a far infrared emission powder, and said heat-barrier material is the micro-sphere material of hollow.
4. reflective insulation powder coating according to claim 1 and 2 is characterized in that: said filler is one or more the mixture in kaolin, lime carbonate, the mica powder.
5. reflective insulation powder coating according to claim 1 and 2 is characterized in that: said auxiliary agent comprises wetting Agent for Printing Inks, anti-fissuring agent and skimmer, and the quality of said wetting Agent for Printing Inks is the 0.5-2% of reflective insulation powder coating total mass; The quality of said anti-fissuring agent is the 0.5-1% of reflective insulation powder coating total mass; The quality of said skimmer is the 0.2-0.5% of reflective insulation powder coating total mass.
6. the preparation method of the said reflective insulation powder coating of claim 1; It is characterized in that: behind the dispersed with stirring opening of device, add powder coating underlying carrier, filler, auxiliary agent successively by the predetermined quality proportioning earlier, after stirring; Add heat-reflecting material, far-infrared radiation material, heat-barrier material successively by the predetermined quality proportioning again; Behind the mixing, sieve packing.
7. 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 the said reflective insulation powder coating of 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.
8. reflective insulation powder coating according to claim 7; It is characterized in that: in the said reflective insulation aqueous overcoating coating B component, the mass percent of polymer emulsion resin is 20-50%, and 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%; Said each set of dispense is 100% than sum.
9. according to claim 7 or 8 described reflective insulation powder coating, it is characterized in that: said polymer emulsion resin is polyacrylate(s) emulsion, organosilicon modified crylic acid resin emulsion or fluorocarbon resin emulsion.
10. according to claim 7 or 8 described reflective insulation powder coating, it is characterized in that: said heat-reflecting material is titanium oxide or coated by titanium dioxide mica; Said far-infrared radiation material is a far infrared emission powder.
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| CN109666353A (en) * | 2017-10-14 | 2019-04-23 | 廖志琳 | A kind of high reflection low-temperature nano exterior coating |
| 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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