CN102864884A - Self-cleaning heat-insulation coating system for exterior wall - Google Patents
Self-cleaning heat-insulation coating system for exterior wall Download PDFInfo
- Publication number
- CN102864884A CN102864884A CN2011101945758A CN201110194575A CN102864884A CN 102864884 A CN102864884 A CN 102864884A CN 2011101945758 A CN2011101945758 A CN 2011101945758A CN 201110194575 A CN201110194575 A CN 201110194575A CN 102864884 A CN102864884 A CN 102864884A
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- Prior art keywords
- coating composition
- weight
- exterior wall
- agent
- heat insulating
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Links
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Abstract
The invention relates to a self-cleaning heat-insulation coating system for an exterior wall. The self-cleaning heat-insulation coating system comprises (a) a hydrophobic undercoat layer, (b) a heat-reflecting surface coating layer and (c) a hydrophilic overcoat layer, wherein the hydrophobic undercoat layer is made from a first coating composition, the first coating composition contains aqueous emulsoid, the water permeability rate of the undercoat layer is 0.3 ml per 24 hours, the heat-reflecting surface coating layer is made from a second coating composition, the second coating composition contains a heat reflecting filler, the surface coating layer has the sun reflectance of at least 85% and/or the hemisphere emission ratio of at least 85%, the hydrophilic overcoat layer which is made from a third coating composition is coated on the heat-reflecting surface coating layer, and the third coating composition contains nano titanium dioxide and an aqueous solvent.
Description
Technical field
The present invention relates to a kind of exterior wall automatically cleaning heat insulating coat system, more specifically, relate to and a kind ofly can provide automatically cleaning character for metope (particularly wall face), reduce the thermal transmittance of construction wall and/or improve the automatically cleaning heat insulating coat system of the simulation energy-saving efficiency of construction wall.
Background technology
At present, growing along with economy, energy consumption problem more and more receives people's concern.As the rich and influential family of energy consumption, building energy consumption accounts for about 30% to 40% of national energy consumption every year.Therefore, how to reduce building energy consumption and become the most urgent in all kinds of energy-conservation researchs, problem demanding prompt solution.
Building energy conservation is mainly reflected in two aspects: insulation and heat insulation, the both Adopts measure in order to have suitable temperature in the holding chamber.Insulation refers generally to enclosed structure and stops in the winter time indoorly to outdoor heat transfer, and makes the suitable temperature of indoor maintenance; And heat insulationly be often referred to enclosed structure is isolated solar radiant heat and outdoor high temperature in summer impact, make its inner surface keep proper temperature.In the thermal isolation material, heat insulating coat or coating system more and more are subject to people's favor because of advantages such as easy to use, good heat-insulation effect and economically feasibles.
In the application process of coating or coating system, the pollutant that exists in the external environment (comprising dust, organic pollution etc.) adheres in its surface inevitably, thereby affects its performance (for example, to sun light reflectivity) and outward appearance.Thereby stain resistance also is one of important indicator of investigating coating or coating system performance.Have found that, can improve by the water sensitivity (for example hydrophobicity) that changes coating surface the stain resistance of coating or coating system.Owing to thinking that the main cause that causes outer wall coating to pollute is that dust in the rainwater entrapped air is fallen coating surface, and tiny contaminant particles enters coating inside with rainwater by the hole on the coating and pollutes, thereby has already developed a kind of hydrophobic coating with lotus leaf effect.But this hydrophobic coating effect in the face of hydrophobic organic pollutant the time is undesirable.
Summary of the invention
The inventor considers, the demand of external wall aspect heat-proof quality and anti-pollution characteristic, thereby need to provide a kind of exterior wall heat insulating coat system, this coating system not only can provide good heat-proof quality for exterior wall by reducing the thermal transmittance be coated with body of wall, reflected sunlight energy, and can have surface self-cleaning and guarantee heat-reflecting surface coating surface cleaning, thereby keep permanently effective to the reflection of solar energy.
In order to satisfy the demand, the invention provides a kind of exterior wall automatically cleaning heat insulating coat system, it comprises:
(a) the hydrophobicity scratch coat that is formed by the first coating composition, wherein said the first coating composition comprises water based emulsion, and the permeability rate of described scratch coat is 0.3mL/24 hour at the most;
(b) the heat reflectivity finishing coat that is formed by the second coating composition, wherein said the second coating composition comprises the heat reflection filler, and the sun reflectivity of described finishing coat is at least 85%, and/or the hemisphere transmitting ratio is at least 85%; With
(c) be coated in the hydrophily skin coat that is formed by the 3rd coating composition on the described heat reflectivity finishing coat, wherein said the 3rd coating composition comprises nano titanium oxide and aqueous solvent.
The present invention also provides a kind of method that is coated with exterior wall, and described method comprises: exterior wall of the present invention is applied on the wall face of described exterior wall with automatically cleaning heat insulating coat system, thereby obtains being coated with the exterior wall of described automatically cleaning heat insulating coat system.In the specific embodiment, described exterior wall comprises following constructional materials, and described constructional materials comprises concrete block, gypsum plank, sandlime brick, gas concrete, composite light-weight scutum, cement fibrolite plate and any combination thereof.
The inventor surprisingly finds, after the coating system that will comprise hydrophobicity scratch coat, heat reflectivity finishing coat and hydrophily skin coat is coated on the wall face of exterior wall, produced synergy between these three coatings, wherein the hydrophobicity scratch coat can reduce the infiltration of outside moisture in the body of wall, can improve simultaneously moisture in the body of wall with the outside diffusion of steam form, thereby reduce the thermal transmittance that increases with water content of body of wall, and heat reflectivity finishing coat reflected sunlight energy effectively, these two provides the heat-proof quality of expectation for exterior wall; Meanwhile, be arranged on the stain resistance energy that hydrophily skin coat on the finishing coat can the Effective Raise finishing coat, thereby guaranteed heat-reflecting surface coating surface cleaning, then the reflection of solar energy kept permanently effective.
It has been generally acknowledged that, one or more other coatings of coating can more or less impact the surface property (such as reflectivity, configuration of surface etc.) of coating on the surface of coating.Yet, the inventor surprisingly finds, according to the present invention, scribble the hydrophily skin coat on the surface of heat reflectivity finishing coat, not only the heat reflectivity of this finishing coat is not subjected to the impact of skin coat and descends, and owing to there being the hydrophily skin coat with self-cleaning performance on the heat reflectivity finishing coat, even if long-term (such as several weeks, several months, and even the several years) be under the ambient conditions of pollution, still keep higher heat reflectivity, thereby the heat insulating coat system that is formed by hydrophobicity scratch coat and heat reflectivity finishing coat of the present invention still can keep excellent heat-proof quality.
Thereby wall face is coated with the exterior wall of this coating system, compares with the exterior wall of uncoated described coating system, and thermal transmittance has descended at least 12%.In addition or or, wall face is coated with the exterior wall of this coating system, compare with the exterior wall of uncoated described coating system, under the meteorological condition in Guangzhou, has at least 20%/annual simulation energy-saving efficiency, perhaps under the meteorological condition in Shanghai, have at least 15%/annual simulation energy-saving efficiency, perhaps under Pekinese's meteorological condition, have at least 6%/annual simulation energy-saving efficiency.
Description of drawings
Fig. 1 is the schematic diagram of simulant building space enclosing structure.
The specific embodiment
Unless this paper has statement in addition, describe the term " " that uses in the context of the present invention or " a kind of " and be appreciated that and comprise plural number.
In the situation that composition is described to comprise or comprise specific components, do not get rid of said composition and comprise other selectable components, unless and indicate in addition clearly, estimate that said composition also can be made of related specific components or form, perhaps in the situation that method is described to comprise or comprise specific process step, do not get rid of the optional processing step that the method comprises other, unless and indicate in addition clearly, estimate that the method also can be made of related specific process step or form.
For easy, this paper only discloses some number ranges clearly.Yet lower limit can be combined to form not the clearly scope of record with any upper limit arbitrarily; And lower limit can be combined to form not the clearly scope of record with other lower limit arbitrarily, and the same arbitrarily upper limit can be combined to form not the clearly scope of record with any other upper limit.In addition, although not clearly record, each point or single numerical value between endpoints of ranges are included in this scope.Thereby each point or single numerical value can be used as lower limit or the upper limit and arbitrarily other point or the single combinations of values or be combined to form not the clearly scope of record with other lower limit or the upper limit of self.
The invention provides a kind of exterior wall automatically cleaning heat insulating coat system, it comprises:
(a) the hydrophobicity scratch coat that is formed by the first coating composition, wherein said the first coating composition comprises water based emulsion, and the permeability rate of described scratch coat is 0.3mL/24 hour at the most;
(b) the heat reflectivity finishing coat that is formed by the second coating composition, wherein said the second coating composition comprises the heat reflection filler, and the sun reflectivity of described finishing coat is at least 85%, and/or the hemisphere transmitting ratio is at least 85%; With
(c) be coated in the hydrophily skin coat that is formed by the 3rd coating composition on the described heat reflectivity finishing coat, wherein said the 3rd coating composition comprises nano titanium oxide and aqueous solvent.
Alternatively, exterior wall of the present invention also comprises with automatically cleaning heat insulating coat system, be arranged on the hydrophobicity putty layer that is formed by the 4th coating composition under the described hydrophobicity scratch coat, described the 4th coating composition comprises the organic silicon hydrophobic agent, and described hydrophobicity putty layer has the at the most water absorption rate of 1.6g/10min.
Of the present invention one preferred embodiment in, the permeability rate of described scratch coat is less than or equal to 0.2mL/24 hour.
Of the present invention another preferred embodiment in, the sun reflectivity of described finishing coat is at least 88%, and/or the hemisphere transmitting ratio is at least 87%.
Of the present invention another preferred embodiment in, described skin coat is when measuring according to stain resistance test method GB/T9780, have 10% or less average reflectance descend, and/or, described skin coat is being applied by oleic acid, and is 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation have 15 degree or less Static Water contact angles after 24 hours.
Of the present invention another preferred embodiment in, described skin coat, when measuring according to stain resistance test method GB/T9780, have 5% or less average reflectance descend.
Of the present invention another preferred embodiment in, described skin coat is being applied by oleic acid, and is 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation have 10 degree or less Static Water contact angles after 24 hours.
Of the present invention another preferred embodiment in, described skin coat has the build that the theory of 0.2-2 micron is calculated.
Of the present invention another preferred embodiment in, wall face is coated with the thermal transmittance of the exterior wall of described coating system, compares with the thermal transmittance of the exterior wall of uncoated described coating system, has descended at least 12%.
In another embodiment of the present invention, wall face is coated with the exterior wall of described coating system, compare with the exterior wall of uncoated described coating system, under the meteorological condition in Guangzhou, has at least 20%/annual simulation energy-saving efficiency, perhaps under the meteorological condition in Shanghai, have at least 15%/annual simulation energy-saving efficiency, perhaps under Pekinese's meteorological condition, have at least 6%/annual simulation energy-saving efficiency.
The term " permeability rate " that uses in this article is to weigh the two measure of coating hydrophobicity and porosity.Particularly, permeability rate refers to, under ambient conditions, for example under room temperature (25 ℃), the atmospheric pressure, in the special time period, for example in 24 hours, permeates the water yield by coating.Generally speaking, construction wall is less than or equal to 0.5mL/24 hour with the permeability rate of coating.In the present invention, the permeability rate of hydrophobicity scratch coat is 0.3mL/24 hour at the most, but can be more than or equal to 0.15mL/24 hour, or more than or equal to 0.1mL/24 hour.
Term used herein " sun reflectivity " refers to, object reflexes to the solar radiation flux and the ratio that is incident on the solar radiation flux on the body surface of half spherical space.In the present invention, the sun reflectivity of heat-reflecting surface coating is at least 85%.
Term used herein " hemispherical emissivity " refers to, radiation source on half direction of bowl every penetrating the ratio of emittance with the radiant exitance of the blackbody radiation source with same temperature.In the present invention, the hemispherical emissivity of heat-reflecting surface coating is at least 85%.
Term used herein " average reflectance " refers to, projects the radiant energy that is reflected on the object and the ratio that projects the integrated radiant emittance on the object, and wherein the contaminated thing contamination of body surface can cause the decline of the average reflectance of this object.In the present invention, the preparation ash of being made by graphite powder stains and the decline of the average reflectance of the skin coat that causes mostly is 10% most, even less.
Term used herein " Static Water contact angle " is to weigh measuring of coating hydrophilic (or hydrophobicity).Generally speaking, hydrophobic coating is characterised in that, the Static Water contact angle is 90 ° or higher; And hydrophilic coating is characterised in that, the Static Water contact angle is lower than 90 °.In the present invention, the skin coat that is polluted by hydrophobic organic pollutants such as oleic acid is 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation keep the following Static Water contact angle of 15 degree after 24 hours, namely keep good hydrophily.
Term used herein " the theoretical build that calculates " is by theory calculating but not the build that actual measurement obtains.In the practice, can calculate by the following theory of carrying out:
In the present invention, the hydrophily skin coat has the build of 0.2 to 2 micron theory calculating.
Term used herein " water absorption rate " is defined as coating in the systemic water yield of special time period.Generally speaking, construction wall uses the water absorption rate of coating less than 2.0g/10min.In the present invention, exterior wall is 1.6g/10min or lower with the water absorption rate of hydrophobicity putty layer.
Term used herein " thermal transmittance " refers to, the difference in air temperature in the space enclosing structure both sides that are made of construction wall is under the condition of 1K, and by the heat output of unit area space enclosing structure, unit is W/ (m within the unit interval
2.K).In the present invention, wall face is coated with the heat transfer efficiency of the exterior wall of automatically cleaning heat insulating coat system of the present invention, compares with the exterior wall of uncoated described coating system, has descended at least 12%.
" the simulation energy-saving efficiency " mentioned herein based on building enclosure model and architectural exterior-protecting construction parameter by to from East China, south China, each department, North China typical urban Guangzhou, Shanghai and Beijing of choosing simulates and obtains.It determines that specifically method is referring to the simulation energy-saving efficiency of part of detecting.In the present invention, wall face is coated with the exterior wall of automatically cleaning heat insulating coat system of the present invention, compare with the exterior wall of uncoated described coating system, under the meteorological condition in Guangzhou, has at least 20%/annual simulation energy-saving efficiency, perhaps under the meteorological condition in Shanghai, have at least 15%/annual simulation energy-saving efficiency, perhaps under Pekinese's meteorological condition, have at least 6%/annual simulation energy-saving efficiency.For example, " the meteorological condition Imitating energy-saving efficiency in the xx area is a% " refers to, under the meteorological condition in xx area, wall face is coated with the energy consumption for cooling and the summation (annual energy consumption) of winter heating's energy consumption in summer of the architectural exterior-protecting construction of automatically cleaning heat insulating coat system, compare with the annual energy consumption of the architectural exterior-protecting construction of uncoated this automatically cleaning heat insulating coat system, the percentage mark that descends, wherein the meteorological condition in xx area can be obtained by the AUTHORITATIVE DATA of the DOE of USDOE, and the meteorological file in the Guangzhou that is for example obtained by DOE is " CHN_Guangzhou_IMEC ".Particularly, can calculate by following formula:
Wherein:
A% represents to simulate energy-saving efficiency, in %;
Eu represents the annual energy consumption of the space enclosing structure of uncoated automatically cleaning heat insulating coat system, in GJ; And
Ec represents to be coated with the annual energy consumption of the space enclosing structure of automatically cleaning heat insulating coat system, in GJ.
When in " coating is coated on surface or the base material " such context, using, term " ... on " comprise coating directly or indirectly be coated on surface or the base material.Therefore, for example coating is coated to and is equivalent to coating on the scratch coat on the base material and is coated on the base material.
When in " the first coating is arranged under the second coating " such context, using, term " ... under " comprise that the first coating is positioned at the second coating below and directly contacts with this second coating.Therefore, for example the hydrophobicity putty layer is arranged on and is equivalent to putty layer under the hydrophobicity scratch coat and directly contacts below scratch coat and with this scratch coat.
Term " colloidal sol " refers to the dispersion of particle (for example titanium dioxide nanoparticle) in liquid carrier, and described liquid carrier comprises the additional additives such as water or water and the aqueous solvent that can form with the miscible solvent of water and optional dispersing agent, pH adjusting agent.
The hydrophobicity scratch coat
Hydrophobicity scratch coat of the present invention is formed by the first coating composition, and wherein said the first coating composition comprises water based emulsion.
Term used herein " water based emulsion " refers to, the dispersion that synthetic resin (being polymer) forms in aqueous medium with particulate form.Therefore, when using for polymer, unless otherwise stated, term " water based emulsion " and " water-borne dispersions " can be used alternatingly in this application.Suitable emulsion polymerization technique is known to persons of ordinary skill in the art, it comprises following steps usually: can be selected under the effect of suitable emulsifier and/or dispersion stabilizer and by means of stirring, make polymerisable monomer in water, be dispersed into emulsion, and for example by adding the polymerization of initator trigger monomer.In the present invention, can (comprise by for example organo-functional group, but be not limited to carboxyl, hydroxyl, amino, NCO, sulfonic group etc.) modification polymer beads is carried out modification, thereby obtain the to have desired properties water based emulsion of (for example dispersed).Therefore, in the present invention, term " water based emulsion " not only comprises the dispersion of polymer beads in aqueous medium of non-modified, also comprises the dispersion of polymer beads in aqueous medium through the organo-functional group modification.The size of the polymer beads in the water based emulsion can be measured by the equal particle diameter of z known in the field, and it refers to, adopts dynamic light scattering method, for example adopts the size of the particle of Marvlen Zetasizer 3000HS microcosmic particle size analyzer mensuration.In the present invention, the equal particle diameter of the z of polymer beads is 200nm at the most in the water based emulsion, is preferably at the most 150nm, is more preferably less than 130nm, also will be more preferably less than 125nm, even be more preferably less than 110nm or less.But the equal particle diameter of the z of polymer beads is preferably at least 50nm in the water based emulsion, is preferably at least 80nm or larger.
In embodiments of the present invention, the water based emulsion in described the first coating composition comprises vinylacetate class water based emulsion, acrylic compounds water based emulsion, silicone based water based emulsion, polyurethanes water based emulsion, fluoropolymers water based emulsion or its combination.
In another embodiment of the present invention, the water based emulsion in described the first coating composition comprises organosilicon water based emulsion, cinnamic acrylic ester water based emulsion, pure acrylate water based emulsion, organic-silicon-modified acrylic ester aquosity latex, vinylacetate water based emulsion, vinyl acetate-acrylate water based emulsion, ethylene-vinyl acetate water based emulsion, vinylacetate-ethene water based emulsion, vinyl acetate-acrylate-tertiary carbon acid esters (for example tertiary ethylene carbonate VeoVa 10) water based emulsion or its combination.
In the specific embodiment of the present invention, the water based emulsion in described the first coating composition comprises the combination of pure acrylate water based emulsion and cinnamic acrylic ester water based emulsion.
In the film forming procedure of coating composition, the polymer beads in the water based emulsion flocks together along with the evaporation of moisture in the coating composition, thereby forms coating.On the one hand, the coating that is formed by the first coating composition of the present invention has hydrophobicity, and aqueous water not too easily permeates by this coating.On the other hand, because the water based emulsion particle has suitable grain size scope in the first coating composition, thereby formed coating has certain porosity, thereby the vapour molecule in the body of wall can spread to the outside by these holes, and has suitable cohesive strength.If the particle diameter of water based emulsion particle is excessive, for example greater than 200nm or larger, the coating that then forms is fine and close not, cohesive strength is not good; And if the particle diameter of water based emulsion particle is too small, for example less than 50nm or less, then can't form the coating with porosity at surface of wall.In the present invention, the coating that is formed by the first coating composition of the present invention not only has hydrophobicity, and has certain porosity, so that described coating has suitable permeability rate, for example when measuring according to JG/T210-2007, has at the most 0.3mL/24 hour permeability rate, preferably have and be less than or equal to 0.2mL/24 hour permeability rate, but can be more than or equal to 0.15mL/24 hour, or more than or equal to 0.1mL/24 hour.That is to say, hydrophobicity scratch coat of the present invention is owing to having hydrophobicity thereby can reduce the infiltration of outside moisture in the body of wall, simultaneously owing to having certain porosity thereby can improve the outside diffusion of body of wall steam, this can have low water content for a long time so that be coated with the body of wall of this coating, thereby suppressed the increase of the wall thermal conductivity (or thermal transmittance) that causes owing to materials for wall suction, and improved human body and be coated with the indoor comfort level of this coating composition.
As mentioned above, water-based emulsion can adopt suitable emulsion polymerisation process preparation well known to those of ordinary skill in the art.Perhaps, as the example of water-based emulsion, can use arbitrarily suitable commercially available product, such as the cinnamic acrylic ester water-based emulsion, for example available from RS 998A or the RS 968 of the well-off industry of Ahmedabad Co., Ltd; Pure acrylate water-based emulsion, for example PE-2133 of PolyWell company.
Preferably, the content of described water based emulsion in the first coating composition of the present invention is with respect to the gross weight of the first coating composition, in the scope of about 30 to 90 % by weight.Preferably, the content of water based emulsion in the first coating composition based on the gross weight of described the first coating composition, is at least about 35 % by weight, more preferably at least about 40 % by weight even more preferably at least about 45 % by weight or best at least about 50 % by weight.And preferably, the content of water based emulsion in the first coating composition, based on the gross weight of described the first coating composition, at the most approximately 85 % by weight, be preferably at the most approximately 80 % by weight, more preferably at the most approximately 75 % by weight, also more preferably at the most approximately 70 % by weight even more preferably at the most approximately 65 % by weight or best about 60 % by weight at the most.In addition, if add extra water during the preparation of inner-wall coating composition, the amount of so extra water unborn water in water based emulsion should count the gross weight of described water-based emulsion.
The first coating composition of the present invention can further comprise one or more fillers.Term used herein " filler " refers to be applicable to any dilatation agent of coating, and it can be organic or inorganic for example particle form.Shape to particle does not have particular restriction, and it can have any suitable shape.The average grain diameter of filler can change in wide region, for example in about 10 nanometers to approximately changing in 50 microns the scope.One or more required character of coating that some fillers are also given composition and/or formed by said composition except the effect of the dilatation agent of playing coating.For example, some fillers coating required color that can give composition and be obtained by said composition.In this case, this filler is also referred to as " pigment ".Some fillers can improve chemistry and/or physical property, can improve especially the engineering properties of the coating that is obtained by said composition.In this case, this filler is also referred to as " reinforcer ".
Suitable exemplary filler for example comprises kaolin, kieselguhr, titanium oxide, calcium carbonate, talcum, barium sulfate, aluminium-magnesium silicate, silica and any combination thereof.In a preferred embodiment, filler can comprise titanium oxide, kieselguhr, calcium carbonate or its combination.
According to the present invention, the total amount of filler can change in wide region, and for example its total amount is that approximately 10 % by weight are preferably approximately 20 % by weight to about 50 % by weight to about 55 % by weight with respect to the gross weight of described composition.According to the present invention, the amount of the filler that preferred the first coating composition comprises with respect to the gross weight of described composition, can be at least about 25 % by weight, more preferably at least about 30 % by weight even more preferably at least about 35 % by weight.According to the present invention, the amount of the filler that preferred the first coating composition comprises with respect to the gross weight of described composition, can be at the most approximately 45 % by weight, more preferably about 40 % by weight at the most.
If necessary, the optional additional additives that comprises of the first coating composition of the present invention, these additives can not adversely affect coating composition or solidified coating therefrom.Suitable additive comprises the aesthetic feeling of the processing characteristics that for example can improve composition or manufacturing property, enhancing composition or improves coating composition or those reagent of the particular functional character of hardening composition therefrom or characteristic (such as the adhesiveness to base material).The additive that can comprise is supporting agent, emulsifier, pigment, metal dust or lotion, filler, anti-migration aids, antiseptic, chain extender, curing compound, sliding agent, coagulating agent, sliding agent, biocide, plasticizing agent, crosslinking agent, defoamer, colorant, wax, antioxidant, anticorrosive, flow control agent, thixotropic agent, dispersing agent, adhesion promoter, UV stabilizing agent, scavenger, thickener, defoamer, pH adjusting agent, coalescents, solvent or its combination.The content of each optional member is enough to play it and is intended to achieve the goal, but preferably, such content can not adversely affect coating composition or solidified coating therefrom.In preferred embodiment, the first coating composition of the present invention can comprise thickener, dispersing agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor, coupling agent or its any combination as additional additives.
According to the present invention, the total amount of additional additives can change in wide region, and for example its total amount is 0 % by weight to about 20 % by weight with respect to the gross weight of described composition, is preferably approximately 0.1 % by weight to about 20 % by weight.According to the present invention, the amount of the additional additives that preferred the first coating composition comprises, with respect to the gross weight of described composition, can be at least about 0.5 % by weight, more preferably at least about 1.0 % by weight in addition more preferably at least about 2.0 % by weight, most preferably at least about 2.5 % by weight.According to the present invention, the amount of the additional additives that preferred the first coating composition comprises, with respect to the gross weight of described composition, can be at the most approximately 15 % by weight, more preferably at the most approximately 12 % by weight even more preferably at the most approximately 10 % by weight, about 8.0 % by weight at the most most preferably.
To the hydrophobic adjusting of coating can by those skilled in the art by known methods or treatment technology realize, for example by selecting suitable fluoropolymer resin to obtain hydrophobic coating, perhaps by the filler that uses in the coating composition is carried out hydrophobic treatment, for example filling surface is carried out silane coupled processing, thereby reach the purpose that obtains hydrophobic coating.In the first coating composition of the present invention, organosilicon water-based emulsion or cinnamic acrylic ester water-based emulsion are used as water-based emulsion.In film forming procedure, the hydrophobic group in the polymer emulsion molecule, the methyl-monosilane base in the organic silicon emulsion molecule for example can point to the interface of coating and air.Be that hydrophobic group covers in coating surface in tightly packed mode, thereby form hydrophobic coating.
Except the common method of above-mentioned two kinds of acquisition hydrophobic coatings, can also in coating composition, add water-repelling agent.The first coating composition of the present invention comprises, and based on the gross weight of described the first coating composition, 0.5 to 2.5wt% organic silicon hydrophobic agent is to strengthen the hydrophobicity of scratch coat.The example of organic silicon hydrophobic agent is the BS-1001 available from German Wacker Chemie AG.
The consumption of organic silicon hydrophobic agent can be determined by normal experiment according to hydrophobicity and the coating character of required coating by those skilled in the art.Usually, the consumption of organic silicon hydrophobic agent is based on the weight of the first coating composition of the present invention, in the scope of about 0.5 % by weight to 2.5 % by weight.If organosilyl consumption is lower than 0.5 % by weight, then can't plays and improve the hydrophobic effect of coating; If organosilyl consumption is too high, for example be higher than 2.5 % by weight, the coating composition that contains excessive water-repelling agent may encounter a difficulty at coating process.
In embodiments of the present invention, described the first coating composition comprises, based on the gross weight of described the first coating composition,
The water based emulsion of 30 to 90 % by weight;
The filler of 10 to 55 % by weight;
The additional additives of 0 to 20 % by weight, wherein said additional additives comprise thickener, dispersing agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor or its any combination.
Preferably, described the first coating composition also comprises, based on the gross weight of described the first coating composition, and the organic silicon hydrophobic agent of 0.5 to 2.5 % by weight.
In a specific embodiment of the present invention, described the first coating composition comprises, with respect to the gross weight of described the first coating composition,
The cinnamic acrylic ester water based emulsion of 10 to 50 % by weight;
The pure acrylate water based emulsion of 10 to 50 % by weight;
The described filler of 10 to 55 % by weight;
0.5 the organic silicon hydrophobic agent to 2.5 % by weight; With
0.1 to the described additional additives of 15 % by weight, described additional additives comprises water-repelling agent, thickener, dispersing agent, wetting agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor, coupling agent or its any combination.
In a concrete especially embodiment of the present invention, described the first coating composition comprises, with respect to the gross weight of described the first coating composition,
The cinnamic acrylic ester water based emulsion of 10 to 50 % by weight;
The pure acrylate water based emulsion of 10 to 50 % by weight;
The filler of 10 to 55 % by weight;
0.5 the organic silicon hydrophobic agent to 2.5 % by weight
0.4 the thickener to 1.0 % by weight;
0.2 the dispersing agent to 2.0 % by weight;
0.1 the wetting agent to 0.5 % by weight;
0.2 the defoamer to 0.6 % by weight;
0.2 the pH adjusting agent to 0.6 % by weight;
0.5 the coalescents to 2.5 % by weight;
0.5 the solvent to 2.5 % by weight;
0.1 the bactericide to 0.3 % by weight;
0.1 the mould inhibitor to 0.5 % by weight; With
0.1 the coupling agent to 0.5 % by weight.
The heat reflectivity finishing coat
Heat reflectivity finishing coat of the present invention is formed by the second coating composition, and wherein said the second coating composition comprises the heat reflection filler.
Term used herein " heat reflection filler " refers to, improves coating composition to the filler of the albedo of sunshine.In the present invention, the sun reflectivity that contains the finishing coat of heat reflection filler is at least 85%, and/or the hemisphere transmitting ratio is at least 85%, and preferably, the sun reflectivity of this finishing coat is at least 88%, and/or the hemisphere transmitting ratio is at least 87%.
In embodiments of the present invention, the heat reflection filler in described the second coating composition comprises titanium oxide, ceramic fine bead or its any combination.In preferred embodiment of the present invention, the heat reflection filler in the second coating composition comprises the combination of ceramic fine bead and titanium dioxide, and the content of this ceramic fine bead, with respect to the gross weight of described the second coating composition, in the scope of 5 to 15 % by weight.
Ceramic fine bead of the present invention can be translucent, high-intensity tiny microballon.In one embodiment, described ceramic fine bead can be the silicate ceramics microballon, is preferably the aluminum silicate ceramic microballon, more specifically is the alkaline silicate aluminum ceramic microspheres.The average grain diameter of ceramic fine bead, for example D
50, can in wide region, change, for example preferably approximately 1 to approximately changing in 50 microns the scope, more preferably approximately 3 to approximately changing in 45 microns the scope.
In one embodiment, described ceramic fine bead can comprise solid ceramic microballon, hollow ceramic microballon or its combination.In a preferred embodiment, described ceramic fine bead comprises average grain diameter (D
50) at about 3 microns solid ceramic microballons to about 10 micrometer ranges.In another preferred embodiment, described ceramic fine bead comprises average grain diameter (D
50) at about 10 hollow ceramic microballons to about 50 micrometer ranges.
As the example of ceramic fine bead, can use arbitrarily suitable commercially available product, such as using available from 3M Corporation the Zeeospheres of US
TMW-610 solid ceramic microballon or join the LJTF-01 hollow ceramic microspheres of clean trade Co., Ltd available from Guangzhou.
Titanium dioxide of the present invention is to be preparation reflection type thermal insulation coating composition filler commonly used in the paint field.In one embodiment, described titanium dioxide can be rutile titanium dioxide.
As the example of titanium dioxide, can use arbitrarily suitable commercially available product, such as the R706 rutile titanium white powder that uses available from E.I.Du Pont Company.
According to the present invention, the content of heat reflection filler, with respect to the gross weight of described the second coating composition, in about 20 % by weight to the scope of about 40 % by weight, preferably in about 20 % by weight to the scope of about 30 % by weight.Preferably, in the heat reflection filler, the content of ceramic fine bead is with respect to the gross weight of described the second coating composition, in the scope of about 5 to 10 % by weight.
The inventor surprisingly finds, the second coating composition of the present invention can form and has the reflexive coating of excellent heat when the heat reflection filler that is comprised of rutile titanium dioxide and ceramic fine bead that contains 20 to 40wt%.In addition, the inventor also finds, the combination that the heat reflection filler comprises hollow ceramic microspheres and solid ceramic microballon can reduce the consumption as the ceramic fine bead of heat reflection filler greatly, and can not damage the heat reflectivity of coating.
Do not wish to be entangled in any theory, the inventor thinks in theory: in the coating forming procedure of the second coating composition, thereby the ceramic fine bead that comprises in the composition tends to move to and forms the surface course that is rich in ceramic fine bead on the coating surface, this can improve the surface nature of coating, such as having increased surperficial heat reflectivity.
Except the heat reflection fillers such as ceramic fine bead, titanium dioxide, mix the present invention's the second coating composition and can also comprise any other filler that is suitable for being used in the coating composition.After this, for the ease of discussing, other filler except heat reflection filler ceramic fine bead that mixes in the inner-wall coating composition is called as " additional filler ".Suitable exemplary additional filler for example comprises kaolin, kieselguhr, calcium carbonate, talcum, barium sulfate, aluminium-magnesium silicate, silica and any combination thereof.In a preferred embodiment, filler can comprise kaolin, kieselguhr, calcium carbonate or its combination.
In the present invention, the consumption of described additional filler can be determined as required by those skilled in the art.Preferably, the second coating composition comprises, with respect to the gross weight of described the second coating composition, and the additional filler of 1 to 30 % by weight.
The second coating composition of the present invention further comprises water based emulsion.Described water based emulsion can have with aforementioned the first coating composition in the same or similar composition of water based emulsion that relates to, but also can be different water based emulsions.Preferably, the water based emulsion in the second coating composition is identical or similar with water based emulsion in the first coating composition, is beneficial to be coated with the adhesion of interlayer.
In embodiments of the present invention, the water based emulsion in described the second coating composition comprises organosilicon water based emulsion, cinnamic acrylic ester water based emulsion, pure acrylate water based emulsion, organic-silicon-modified acrylic ester aquosity latex, vinylacetate water based emulsion, vinyl acetate-acrylate water based emulsion, vinylacetate-ethene water based emulsion, ethylene-vinyl acetate water based emulsion, vinyl acetate-acrylate-tertiary carbon acid esters (for example tertiary ethylene carbonate VeoVa) water based emulsion or its combination.
As described in hydrophobicity scratch coat part, water-based emulsion can adopt suitable emulsion polymerisation process preparation well known to those of ordinary skill in the art.Perhaps, as the example of water-based emulsion, can use arbitrarily suitable commercially available product, such as the pure acrylate water-based emulsion, the GD56 of Henkel Corp. for example.
Preferably, the content of described water based emulsion in the second coating composition of the present invention is with respect to the gross weight of the second coating composition, in the scope of about 30 to 78 % by weight.Preferably, the content of water based emulsion in the second coating composition based on the gross weight of described the second coating composition, is at least about 35 % by weight, more preferably at least about 40 % by weight even more preferably at least about 45 % by weight or best at least about 50 % by weight.And preferably, the content of water based emulsion in the second coating composition, based on the gross weight of described the second coating composition, be at the most approximately 75 % by weight, more preferably at the most approximately 70 % by weight even more preferably at the most approximately 65 % by weight or best about 60 % by weight at the most.In addition, if add extra water during the preparation of coating composition, the amount of so extra water unborn water in water based emulsion should count the gross weight of described water-based emulsion.
If necessary, the optional additional additives that comprises of the second coating composition of the present invention, these additives can not adversely affect coating composition or solidified coating therefrom.Suitable additive comprises the aesthetic feeling of the processing characteristics that for example can improve composition or manufacturing property, enhancing composition or improves coating composition or those reagent of the particular functional character of hardening composition therefrom or characteristic (such as the adhesiveness to base material).The additive that can comprise is supporting agent, emulsifier, pigment, metal dust or lotion, filler, anti-migration aids, antiseptic, chain extender, curing compound, sliding agent, coagulating agent, sliding agent, biocide, plasticizing agent, crosslinking agent, defoamer, colorant, wax, antioxidant, anticorrosive, flow control agent, thixotropic agent, dispersing agent, adhesion promoter, UV stabilizing agent, scavenger, thickener, defoamer, pH adjusting agent, coalescents, solvent or its combination.The content of each optional member is enough to play it and is intended to achieve the goal, but preferably, such content can not adversely affect coating composition or solidified coating therefrom.In preferred embodiment, the second coating composition of the present invention can comprise additional filler, thickener, dispersing agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor or its any combination as additional additives.The additional additives that uses in the kind of the additive in the described additional additives except additional filler and the above-mentioned hydrophobicity scratch coat is similar.In addition, the consumption of these additives can be determined as required by those skilled in the art.
In embodiments of the present invention, described the second coating composition comprises, based on the gross weight of described the second coating composition,
The water based emulsion of 30 to 80 % by weight;
The heat reflection filler of 20 to 40 % by weight;
The additional additives of 0 to 40 % by weight, wherein said additional additives comprise additional filler, thickener, dispersing agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor, coupling agent or its any combination.
In a specific embodiment of the present invention, described the second coating composition comprises, based on the gross weight of described the second coating composition,
The pure acrylate water based emulsion of 30 to 78 % by weight;
The described heat reflection filler of 20 to 40 % by weight, described heat reflectivity filler comprises solid ceramic microballon, hollow ceramic microspheres, titanium dioxide or its combination; With
0.1 to the described additional additives of 40 % by weight, described additional additives comprises additional filler, thickener, dispersing agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor, coupling agent or its any combination.
In a special specific embodiment of the present invention, described the second coating composition comprises, with respect to the gross weight of described the second coating composition,
The pure acrylate water based emulsion of 30 to 70 % by weight;
The described heat reflection filler of 20 to 40 % by weight, described heat reflectivity filler comprises solid ceramic microballon, hollow ceramic microspheres, titanium dioxide or its combination;
The additional filler of 1 to 30 % by weight;
0.4 the thickener to 2.0 % by weight;
0.2 the dispersing agent to 1.0 % by weight;
0.2 the defoamer to 2.0 % by weight;
0.1 the pH adjusting agent to 0.3 % by weight;
The coalescents of 0 to 2.0 % by weight;
The solvent of 0 to 2.0 % by weight;
0.1 the bactericide to 0.3 % by weight;
0.1 the mould inhibitor to 0.5 % by weight; With
0.1 the coupling agent to 0.5 % by weight.
The hydrophily skin coat
Hydrophily skin coat of the present invention is formed by the 3rd coating composition, and is arranged on the heat reflectivity finishing coat of the present invention, and wherein said the 3rd coating composition comprises nano titanium oxide and aqueous solvent.
Term used herein " nano titanium oxide " refers to have the titanium dioxide of nano-scale, for example particle diameter D
50In 1 to 500nm scope, in preferred 5 to the 200nm scopes, the more preferably titanium dioxide in 10 to the 150nm scopes.
Term used herein " aqueous solvent " refers to, water and with the various solvents that water can be miscible, include, but not limited to water, alcohols solvent, ketones solvent, amide solvent etc., for example can be water; Methyl alcohol, ethanol, propyl alcohol, butanols; Acetone, butanone, methyl ethyl ketone; Dimethyl formamide, dimethylacetylamide and combination thereof.Preferably, aqueous solvent is water.In order to accelerate the rate of drying of coating composition, can make water and with water can be miscible the mixture of solvent, such as the combination of combination, water and the acetone of water and ethanol, etc.Those skilled in the art can determine by simple experiment composition and the ratio of above mixed solvent, thereby obtain the rate of drying of suitable coating composition.
In the present invention, nano titanium oxide can form colloidal sol in aqueous solvent (for example water), and such as forming the colloidal sol that at room temperature has 1.0 to 50.0mPa.s viscosity, namely the 3rd coating composition can be used with solation.
In the present invention, the skin coat that contains nano titanium oxide not only has excellent hydrophily, and has excellent light (for example UV light) catalytic activity.In embodiments of the present invention, described skin coat, when measuring according to stain resistance test method GB/T9780, have 10% less, preferred 5% or less average reflectance descend; And/or, described skin coat is being applied by oleic acid, and is 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation have 15 degree or less, preferred 10 degree or less Static Water contact angles after 24 hours.
In addition, in the present invention, the skin coat that contains the titanium dioxide granule of nanoscale has the build of 0.2 to 2 micron theory calculating, is transparent basically, thereby can have any impact to the surface property of the heat reflectivity finishing coat below it.In embodiments of the present invention, the sun reflectivity that is coated with the heat reflectivity finishing coat of hydrophily skin coat on its surface is at least 88%, and/or the hemisphere transmitting ratio is at least 87%.
Although do not wish to be entangled in any theory, but we believe, the nano titanium oxide that is included in the skin coat of the present invention can form the Surface Oxygen hole after the radiation of UV light, and these Surface Oxygen holes are by the moisture in chemistry or the physisorption absorbed air, thereby formation hydrophilic surface, thereby its surface is difficult for contaminated thing (comprising inorganic pollution and organic pollution) and adheres to.Even the surface attachment of hydrophily skin coat organic pollution (such as oleic acid), this pollutant also can decompose by the photocatalysis of nano titanium oxide, thereby realizes the self-cleaning surface of skin coat.
As the example in the source of nano titanium oxide, can use arbitrarily suitable commercially available product, such as the nano titanium oxide complex sol SL101 that uses available from name paddy science and technology, its solid content is in the scope of 0.1 to 5 % by weight.
In embodiments of the present invention, the content of described nano titanium oxide in the 3rd coating composition of the present invention is with respect to the gross weight of the 3rd coating composition, in the scope of about 0.05 to 20 % by weight.Preferably, the content of nano titanium oxide in the 3rd coating composition, based on the gross weight of described the 3rd coating composition, at least 0.06 % by weight, at least 0.1 % by weight, at least 1 % by weight, be at least about 1.5 % by weight, more preferably at least about 2 % by weight even more preferably at least about 2.5 % by weight.And preferably, the content of nano titanium oxide in the 3rd coating composition based on the gross weight of described the 3rd coating composition, is at the most approximately 15 % by weight, more preferably at the most approximately 10 % by weight even more preferably about 8 % by weight at the most.Although more than stipulated the bound of nano titanium oxide consumption, this consumption is not limited to this.Those skilled in the art can determine the consumption of suitable nano titanium oxide according to actual needs by normal experiment, for example reduce the consumption of nano titanium oxide to reduce production costs, perhaps increase the consumption of nano titanium oxide to improve hydrophily and the photocatalytic activity of hydrophily skin coat.
In embodiments of the present invention, the content of described aqueous solvent in the 3rd coating composition of the present invention is with respect to the gross weight of the 3rd coating composition, in the scope of about 60 to 99.95 % by weight.Preferably, the content of aqueous solvent in the 3rd coating composition based on the gross weight of described the 3rd coating composition, is at least about 65 % by weight, more preferably at least about 70 % by weight even more preferably at least about 80 % by weight.Same, the consumption of aqueous solvent also is not limited to this.Those skilled in the art can determine the consumption of aqueous solvent according to actual needs by normal experiment, to obtain the colloidal sol of stable nano titanium oxide in aqueous solvent.
If necessary, the optional additional additives that comprises of the 3rd coating composition of the present invention, these additives can not adversely affect coating composition or solidified coating therefrom.Suitable additive comprises the aesthetic feeling of the processing characteristics that for example can improve composition or manufacturing property, enhancing composition or improves coating composition or those reagent of the particular functional character of hardening composition therefrom or characteristic (such as the adhesiveness to base material).The additive that can comprise is emulsifier, pigment, metal dust or lotion, filler, anti-migration aids, antiseptic, chain extender, curing compound, sliding agent, coagulating agent, sliding agent, biocide, plasticizing agent, crosslinking agent, defoamer, stabilizing agent, colorant, wax, antioxidant, anticorrosive, flow control agent, thixotropic agent, dispersing agent, adhesion promoter, the UV stabilizing agent, scavenger, thickener, defoamer, pH adjusting agent, coalescents, solvent, or its combination.The content of each optional member is enough to play it and is intended to achieve the goal, but preferably, such content can not adversely affect coating composition or solidified coating therefrom.In preferred embodiment, the 3rd coating composition of the present invention can comprise dispersing agent, pH adjusting agent, stabilizing agent, defoamer, coalescents, bactericide, mould inhibitor and any combination thereof as additional additives.In addition, the consumption of these additives can be determined as required by those skilled in the art.
In embodiments of the present invention, the 3rd coating composition can be by following acquisition: the nano titanic oxide sol (such as the nano titanium oxide complex sol SL101 available from name paddy science and technology) of high solids content is mixed with extra aqueous solvent, additional additives (such as stabilizing agent, defoamer) etc., to obtain to have the 3rd coating composition of expectation nanometer titanium dioxide Ti content; Perhaps the nano titanium dioxide powder of appropriate amount can be mixed with aqueous solvent, additional additives (such as stabilizing agent, defoamer) etc., to obtain to have the 3rd coating composition of expectation nanometer titanium dioxide Ti content.
In embodiments of the present invention, described the 3rd coating composition comprises, based on the gross weight of described the 3rd coating composition,
0.05 the nano titanium oxide to 20 % by weight;
The aqueous solvent of 60 to 99.95 % by weight;
The additional additives of 0 to 20 % by weight, described additional additives comprise dispersing agent, defoamer, stabilizing agent, pH adjusting agent, coalescents, bactericide, mould inhibitor or its any combination.
In a specific embodiment of the present invention, described the 3rd coating composition comprises, with respect to the gross weight of described the 3rd coating composition,
0.05 the nano titanium oxide to 20 % by weight;
The aqueous solvent of 60 to 99 % by weight;
0.5 the dispersing agent to 2.0 % by weight;
0.2 the pH adjusting agent to 1.0 % by weight;
0.1 the stabilizing agent to 1.0 % by weight; With
0.1 the defoamer to 1.0 % by weight.
In embodiments of the present invention, the hydrophily skin coat is arranged on the heat reflectivity finishing coat, because it is the transparent heat reflectivity that can not adversely affect the heat reflectivity finishing coat, and owing to having self-cleaning performance, thereby be provided with the heat reflectivity finishing coat of this hydrophily skin coat on it, even if long-term (such as several weeks, several months, and even the several years) be under the external environment condition, still can keep higher heat reflectivity, thereby the heat insulating coat system that comprises hydrophobicity scratch coat and heat reflectivity finishing coat of the present invention still can keep excellent heat-proof quality.
The hydrophobicity putty layer
Hydrophobicity putty layer of the present invention is formed by the 4th coating composition, and as conventional putty layer, is arranged under the hydrophobicity scratch coat of the present invention and is applied on the base material, and wherein said the 4th coating composition comprises the organic silicon hydrophobic agent.
Term used herein " organic silicon hydrophobic agent " refers to, has silane functional and provides hydrophobic reagent for coating composition.In the present invention, the organic silicon hydrophobic agent refers to have highly active redispersible silylation water-repelling agent, and it has splendid whipping performance, forms lasting chemical bond with cement bonding agent, and can use with the collocation of organic polymer rubber powder.When organic silicon hydrophobic agent of the present invention and finished ground cement and organic polymer rubber powder are used in conjunction with, formed hydrophobicity putty layer has good hydrophobic performance, for example have 1.6g/10min or lower water absorption rate, the water absorption rate of defined is lower than the standard of 2.0g/10min in the industry standard of external wall putty.
In the present invention, has hydrophobic micropore owing to comprising the hydrophobicity putty layer of the 4th coating composition formation of organic silicon hydrophobic agent, thereby the water absorption rate that has reduced putty layer itself and be coated with the exterior wall of this putty layer, steam in the exterior wall passes through these hydrophobic micropores constantly to air evaporation simultaneously, thereby suppressed the increase of the wall thermal conductivity (or thermal transmittance) that causes owing to the suction of the constructional materials of exterior wall, improved energy-saving efficiency, and improved human body and be coated with the indoor comfort level of this coating composition.
As the example of organic silicon hydrophobic agent, can use arbitrarily suitable commercially available product, such as the organosilicon moisture repellent SEAL 80 available from Akzo Nobel N.V..
Preferably, the content of described organic silicon hydrophobic agent in the 4th coating composition of the present invention is with respect to the gross weight of the 4th coating composition, in about 0.1 to 10wt% scope.Preferably, the content of organic silicon hydrophobic agent in the 4th coating composition based on the gross weight of described the 4th coating composition, is at least about 0.2 % by weight, at least about 0.3 % by weight, at least about 0.5 % by weight, at least about 1 % by weight.And preferably, the content of organic silicon hydrophobic agent in the 4th coating composition based on the gross weight of described the 4th coating composition, is 9 % by weight at the most, is preferably at the most 8 % by weight, more preferably 5 % by weight at the most.Although more than stipulated the bound of organic silicon hydrophobic agent consumption, this consumption is not limited to this.The consumption of organic silicon hydrophobic agent can be determined by normal experiment according to actual needs by those skilled in the art.
The 4th coating composition of the present invention further comprises cementing agent.Described " cementing agent " refers to make each component (including but not limited to filler) in the coating composition evenly to be bonded together and to give the material of the certain cohesive strength of coating composition in this article.In the present invention, cementing agent comprises the two the combination of finished ground cement and organic polymer.
In embodiments of the present invention, the finished ground cement in the cementing agent comprises the finished ground cement of various labels well known to those of ordinary skill in the art, the finished ground cement of labels such as 225#, 325#, 425#, 525#.Although more than enumerated the kind of finished ground cement, the present invention is not limited thereto.Those skilled in the art can use different types of finished ground cement according to actual needs.
In the present invention, the cementing agent in the 4th coating composition also includes organic polymer, thereby for putty layer provides excellent pliability, and further improve the 4th coating composition adhesive property and cohesion.In embodiments of the present invention, organic polymer comprises ethylene-vinyl acetate emulsion powder, Acrylic emulsion powder and combination thereof.In preferred embodiment of the present invention, organic polymer comprises redispersible ethylene-vinyl acetate emulsion powder.
Above-mentioned emulsion powder can adopt suitable emulsion polymerisation process preparation and drying well known to those of ordinary skill in the art to obtain.Perhaps, as the example of emulsion powder, can use arbitrarily suitable commercially available product.For example, as the example of ethylene-vinyl acetate emulsion powder, can use EVA latex powder 60W, MP2050, the FX2350 etc. of Akzo Nobel N.V..
In the present invention, the ratio of the finished ground cement in the cementing agent and emulsion powder can be determined according to normal experiment by those skilled in the art.
Preferably, the content of described cementing agent in the 4th coating composition of the present invention is with respect to the gross weight of the 4th coating composition, in the scope of about 20 to 40 % by weight.Preferably, the content of cementing agent in the 4th coating composition based on the gross weight of described the 4th coating composition, is at least about 22 % by weight, more preferably at least about 25 % by weight even more preferably at least about 28 % by weight or best at least about 30 % by weight.And preferably, the content of cementing agent in the 4th coating composition based on the gross weight of described the 4th coating composition, is at the most approximately 38 % by weight, more preferably at the most approximately 35 % by weight or best about 34 % by weight at the most.
The 4th coating composition of the present invention can further comprise one or more fillers.Described filler has and the same or similar composition of the first coating composition.Preferably, described filler comprises quartz sand, calcium carbonate and combination thereof.
According to the present invention, the total amount of filler can change in wide region, and for example its total amount is that approximately 40 % by weight are preferably approximately 45 % by weight to about 70 % by weight to about 78 % by weight with respect to the gross weight of described the 4th coating composition.According to the present invention, the amount of the filler that preferred the 4th coating composition comprises with respect to the gross weight of described composition, can be at least about 48 % by weight, more preferably at least about 50 % by weight even more preferably at least about 55 % by weight.According to the present invention, the amount of the filler that preferred the 4th coating composition comprises with respect to the gross weight of described composition, can be at the most approximately 68 % by weight, more preferably about 66 % by weight at the most.
If necessary, the optional additional additives that comprises of the 4th coating composition of the present invention, these additives can not adversely affect coating composition or solidified coating therefrom.Suitable additive comprises processing characteristics or the manufacturing property that for example can improve composition or improves coating composition or those reagent of the particular functional character of hardening composition therefrom or characteristic (such as the adhesiveness to base material).The additive that can comprise is emulsifier, pigment, metal dust or lotion, filler, anti-migration aids, antiseptic, chain extender, curing compound, sliding agent, coagulating agent, sliding agent, biocide, plasticizing agent, crosslinking agent, defoamer, colorant, wax, antioxidant, anticorrisive agent, flow control agent, thixotropic agent, dispersing agent, adhesion promoter, the UV stabilizing agent, scavenger, thickener, water-loss reducer, defoamer, pH adjusting agent, coalescents, antifreeze, slipping agent, water reducing agent, solvent, or its combination.The content of each optional member is enough to play it and is intended to achieve the goal, but preferably, such content can not adversely affect coating composition or solidified coating therefrom.In preferred embodiment, the 4th coating composition of the present invention can comprise thickener, water-loss reducer, anticorrisive agent, antifreeze, slipping agent, water reducing agent and any combination thereof as additional additives.In addition, the consumption of these additives can be determined as required by those skilled in the art.
In embodiments of the present invention, described the 4th coating composition comprises, based on the gross weight of described the 4th coating composition,
20 to 40wt% cementing agent, described cementing agent comprises finished ground cement and organic polymer;
40 to 78wt% filler;
0.1 the described organic silicon hydrophobic agent to 10wt%; With
0 to 10wt% additional additives, described additional additives comprise thickener, water-loss reducer, anticorrisive agent, antifreeze, slipping agent, water reducing agent or its any combination.
In a specific embodiment of the present invention, described the 4th coating composition comprises, with respect to the gross weight of described the 4th coating composition,
20 to 40wt% cementing agent, described cementing agent comprises finished ground cement and organic polymer;
40 to 78wt% filler;
0.1 the described organic silicon hydrophobic agent to 10wt%; With
0.1 the thickener to 2.0wt%.
In the present invention, coating composition can comprise thickener.Suitable thickener comprises non-polyurethane-type thickener or its any combination of cellulose ethers thickener, salt tolerant class thickener, starch ethers thickener, alkali swelling type thickener, polyurethane-type thickener, hydrophobically modified.All types of thickeners all are commercially available commodity.For example, as the example of cellulose ethers thickener, can use the methyl hydroxyethylcellulose ethers thickener HEC 250HBR available from U.S. Aqualon Company; Or available from the lignocellulosic ZZC500 of German JRS company.As salt tolerant class thickener, can use the HCMC 75000S available from the LG-DOW chemical industry.As starch ethers thickener, can use the Casucol 301 available from Dutch Ai Weibei.As the example of alkali swelling type thickener, can use the Rohm﹠amp available from the U.S.; The TT935 of Haas company or use are available from the Rheotech 3500 of Coatex company.As the example of polyurethane-type thickener, can use the RHEOLATE 278 available from upper nautical mile specialization industry science skill Co., Ltd.
In a preferred embodiment, described the first coating composition with respect to the gross weight of described composition, comprises approximately 0.4 % by weight to the about thickener of 1.0 % by weight.In another preferred embodiment, described the second coating composition with respect to the gross weight of described composition, comprises approximately 0.4 % by weight to the about thickener of 2.0 % by weight.Another preferred embodiment in, described the 4th coating composition with respect to the gross weight of described composition, comprises the thickener of 0.1 to 2.0 % by weight.
In the present invention, coating composition can comprise dispersing agent.Suitable dispersing agent can comprise anionic dispersing agent, cationic dispersing agent, non-ionic dispersing agent, amphoteric dispersant or its any combination.All types of dispersing agents all are commercially available commodity.In preferred embodiment, suitable dispersing agent comprises polyacrylic acid dipersant, poly-methyl acrylate dispersing agent, polycarboxylate salt dispersant or its any combination.As the example of polyacrylic acid dipersant, can use the Rohm﹠amp available from the U.S.; The polyacrylic acid dipersant 731A of Haas company maybe can use the polyacrylic acid dipersant 120V available from the LG-DOW chemical industry.
In a preferred embodiment, described the first coating composition with respect to the gross weight of described coating composition, comprises approximately 0.2 % by weight to the about dispersing agent of 2.0 % by weight.Another preferred embodiment in, described the second coating composition with respect to the gross weight of described coating composition, comprises approximately 0.2 % by weight to the about dispersing agent of 1.0 % by weight.Another preferred embodiment in, described the 3rd coating composition with respect to the gross weight of described coating composition, comprises the approximately dispersing agent of 0.5 % by weight to 2.0 % by weight.
In the present invention, coating composition can comprise wetting agent.Suitable wetting agent is commercially available commodity, such as the CF-10 available from the LG-DOW chemical industry.
In the present invention, coating composition can comprise defoamer.Suitable defoamer includes organic siloxane defoamer, grease defoamer, polyethers defoamer, polyether-modified silicone based defoamer or its any combination.All types of defoamers all are commercially available commodity.As the example of organosiloxane defoamer, can use the SN154 available from Japanese Nuo Puke.As the example of grease defoamer, can use the 122NS available from Japanese Nuo Puke.
In a preferred embodiment, described the first coating composition with respect to the gross weight of described coating composition, comprises approximately 0.2 % by weight to the about defoamer of 0.6 % by weight.Another preferred embodiment in, described the second coating composition with respect to the gross weight of described coating composition, comprises the defoamer of 0.2 to 2.0 % by weight.Another preferred embodiment in, described the 3rd coating composition with respect to the gross weight of described coating composition, comprises approximately 0.1 % by weight to the about defoamer of 1.0 % by weight.
In the present invention, coating composition can comprise pH adjusting agent.Suitable pH adjusting agent comprises inorganic pH adjusting agent, and such as natrium carbonicum calcinatum, NaOH, potassium hydroxide, sodium acid carbonate, hydramine, ammoniacal liquor, triethylamine, perhaps organic pH adjusting agent is such as the organosilicon pH adjusting agent.In a preferred embodiment, pH adjusting agent comprises organosilicon pH adjusting agent BS-16.
In preferred embodiment, described the first coating composition or the second coating composition with respect to the gross weight of described coating composition, can comprise approximately 0.2 to the about pH adjusting agent of 0.6 % by weight.Another preferred embodiment in, described the 3rd coating composition with respect to the gross weight of described coating composition, comprises approximately 0.2 to the about pH adjusting agent of 1.0 % by weight.
In the present invention, coating composition comprises coalescents.Suitable coalescents comprises the dodecane alcohol ester.
In preferred embodiment, described the first coating composition with respect to the gross weight of described coating composition, comprises approximately 0.5 to the about coalescents of 2.5 % by weight.Another preferred embodiment in, described the second coating composition with respect to the gross weight of described coating composition, comprises the coalescents of 0 to 2.0 % by weight.
In the present invention, coating composition can comprise solvent.Suitable solvent comprises alcohols solvent, ketones solvent or its combination.As the example of alcohols solvent, can use general industry product propane diols, ethylene glycol.
In preferred embodiment, described the first coating composition with respect to the gross weight of described coating composition, comprises the approximately solvent of 0.5 to 2.5 % by weight.Another preferred embodiment in, described the second coating composition with respect to the gross weight of described coating composition, comprises the approximately solvent of 0 to 2.0 % by weight.
In the present invention, coating composition can comprise bactericide.Suitable bactericide comprises quaternary ammonium salt bactericide, chloride bactericide, peroxide bactericide, azoles quinoline series bactericidal agent, aldehydes bactericide or its arbitrary composition.All types of bactericide all are commercially available commodity.For example, as the example of azoles quinoline series bactericidal agent, can use the BIT20 available from Chinese Ou Mo company.Perhaps as the example of bactericide, can use the A203 available from sky, Guangzhou occasion microorganism Co., Ltd.
In preferred embodiment, described the first coating composition or described the second coating composition with respect to the gross weight of described coating composition, can comprise approximately 0.1 to the about bactericide of 0.3 % by weight.
In the present invention, coating composition can comprise mould inhibitor.Suitable mould inhibitor comprises phenols mould inhibitor, chlorophenols mould inhibitor, ester class mould inhibitor, heterocyclic mould inhibitor, amide-type mould inhibitor, organic metal salt mould inhibitor, inorganic salts mould inhibitor or its any combination.All types of mould inhibitors all are commercially available commodity.For example, as the example of bactericide, can use W350, perhaps can use the FA39 available from Singapore PCTS
In preferred embodiment, described the first coating composition or described the second coating composition with respect to the gross weight of described coating composition, can comprise approximately 0.1 to the about mould inhibitor of 0.5 % by weight.
In the present invention, coating composition can comprise coupling agent.Suitable coupling agent comprises silane coupler.For example, as the example of silane coupler, can use the WD60 available from Beijing An Tenapu company.
In preferred embodiment, described the first coating composition or described the second coating composition with respect to the gross weight of described coating composition, can comprise the approximately coupling agent of 0.1 to 0.5 % by weight.
In the present invention, coating composition can comprise stabilizing agent.Any suitable stabilizing agent all is commercially available.As the example of stabilizing agent, can use available from the inferior freeze thawing resistance stabilizing agent FT-100 in U.S. sieve ground.
In preferred embodiment, described the 3rd coating composition with respect to the gross weight of described coating composition, comprises the approximately stabilizing agent of 0.1 to 1.0 % by weight.In the present invention, the preparation of coating composition can adopt any suitable mixed method well known to those of ordinary skill in the art to realize.For example coating composition can be made by following: all components is all added in the container, then the gained mixture is stirred to evenly.Perhaps coating composition can be made by following: the part component is mixed first, and then add remaining other components, thereby form uniform mixture.
In preferred embodiment of the present invention, the first coating composition and the second coating composition that form hydrophobicity scratch coat and heat reflectivity finishing coat are made by following: the part additional additives is mixed with filler, and then add water-based emulsion and remaining additional additives, thereby form uniform mixture.In preferred embodiment of the present invention, the 3rd coating composition and the 4th coating composition that form hydrophily skin coat and hydrophobicity putty layer are made by whole components are dropped in the mixer and mix.
Coating composition of the present invention can sequentially be coated with by conventional method known to persons of ordinary skill in the art.For example, coating composition can apply by spray gun, roller, scraper or brushing.
In the present invention, the automatically cleaning heat insulating coat system that comprises the automatically cleaning heat insulating coat system of scratch coat, finishing coat and skin coat or comprise putty layer, scratch coat, finishing coat and skin coat can be coated on the various construction walls, to improve heat-proof quality and the stain resistance energy of construction wall.In the specific embodiment, described construction wall comprises following constructional materials, and described constructional materials comprises concrete block, gypsum plank, sandlime brick, gas concrete, composite light-weight scutum, cement fibrolite plate and any combination thereof.
Describe by the following examples the present invention in detail.Yet the present invention is not limited to these embodiment.
Embodiment
Part of detecting
Permeability rateCarry out according to the regulation among the construction industry industry standard JG/T 210-2007.
Sun reflectivityRegulation according to the method 210 among the GJB GJB 2502-1996 is carried out.
Hemispherical emissivityRegulation according to the method 310 among the GJB GJB 2502-1996 is carried out.
Average reflectance descendsCarry out according to the regulation among standard GB/T/T 9780-2005
The Static Water contact angleFollowing mensuration: on Dataphysics OCA 30 instruments, utilize deionized water as test liquid, at room temperature (～21 ℃) measure the Static Water contact angle, and determine by the average of three differences measurement numerical value on each sample surfaces.
Water absorption rateCarry out according to the regulation among the construction industry industry standard JG/T157-2009.
Thermal transmittanceCarry out according to the regulation among standard GB/T/T 23483-2009 " building exterior-protected and heating quantity measuring method ".
The simulation energy-saving efficiencyBased on the following building maintenance structure of maintenance and architectural exterior-protecting construction parameter, the simulation of energy consumption software Energyplus of employing USDOE exploitation (
Http:// www.eere.energy.gov/buildings/envergyplus/) carry out, wherein the meteorological data in each city derives from the AUTHORITATIVE DATA of DOE (USDOE).The city of specifically choosing such as following table 1:
The meteorological file in District Representative city
Shanghai, East China CHN_Shanghai_SWERA
Guangzhou, south China CHN_Guangzhou_IWEC
Beijing, North China CHN_Beijing_SWERA
The structure of architectural exterior-protecting construction is as follows: this building is 2 layers, long-pending 100 square metres of every aspect, 3.2 meters of floor heights, and main body is oriented south orientation.In east, west, south orientation be provided with horizontal external sunshade.Window-wall ratio is 0.25.Concrete structure is referring to accompanying drawing 1.
Used Design of Retaining Structure parameter in the simulation process:
Exterior wall Class1 (thermal transmittance k=0.857w/m2.K)
Exterior wall type 2 (thermal transmittance k=1.413w/m2.K)
Exterior wall type 3 (thermal transmittance k=2.120w/m2.K)
Exterior wall type 4 (thermal transmittance k=1.242w/m2.K)
Exterior wall type 5 (thermal transmittance k=0.973w/m2.K)
Interior wall (thermal transmittance k=1.99w/m2.K)
Exterior window (6+13+6) (thermal transmittance k=2.4w/m2.K)
Roof (thermal transmittance k=0.69w/m2.K)
Ground (thermal transmittance k=0.46w/m2.K)
Indoor design: winter: 18 ℃
Summer: 26 ℃
Putty layer
Forming the raw material that comprises in the 4th coating composition of putty layer is listed in as in the following table 1.
Table 1
| Trade name | Supplier/distributors | Describe |
| 42.5 cement | The general industry product | Cementing agent |
| 200 order quartz sands | The general industry product | Filler |
| 325 order powdered whitings | The general industry product | Filler |
| FX 2350 | Akzo Nobel N.V. | The ethylene-vinyl acetate cementing agent |
| HPMC 75000S | The LG-DOW chemical industry | Cellulose thickener |
| Casucol 301 | Holland Ai Weibei | The starch ether thickener |
| ZZC 500 | Germany JRS company | Cellulose thickener |
| Seal 80 | Akzo Nobel N.V. | The organic silicon hydrophobic agent |
Embodiment 1
Be used to form following being prepared of the 4th coating composition of hydrophobicity putty layer.Cement, quartz sand, powdered whiting, EVA rubber powder, HCMC 75000S, starch ether Casucol 301, lignocellulosic ZZC500 and water-repelling agent Seal 80 are added in the dry-powder putty mixing and blending machine successively, and stir, thereby obtain the coating composition of putty layer.The amounts specified of each component in the 4th coating composition that is used to form putty layer of embodiment 1 is in table 2.
Table 2. is used to form composition and the performance thereof of the 4th coating composition of putty layer
Be can clearly be seen that by above table 2 result, the coating composition that is used to form putty layer comprises the organic silicon hydrophobic agent, and has the strong-hydrophobicity micropore by the putty layer that this coating composition forms, wherein water absorption rate only is 1.6g/10min, is lower than the standard of 2.0g/10min well below the water absorption rate of the putty layer of building trade regulation.
Scratch coat
Forming the raw material that comprises in the coating composition of hydrophobicity scratch coat is listed in as in the following table 3.
Table 3
| Trade name | Supplier/distributors | Describe |
| RS-998A | The well-off industry of Ahmedabad Co., Ltd | The cinnamic acrylic ester latex |
| PE-2133 | PolyWell company | The pure acrylate emulsion |
| R298 | Shanghai face titanium Industrial Co., Ltd. | The rutile titanium white powder |
| CELITE 350 | The intelligent titanium white of Shanghai standing grain industrial corporation | Kieselguhr |
| GF117 | China's wide Fujian material | Powdered whiting |
| TA-800 | Kunshan prosperous superfine powder Co., Ltd | French chalk |
| HEC 250HBR | U.S. Aqualon Company | The cellulose ethers thickener |
| RHEOLATE 278 | This company of U.S.'s hamming | Modified polyurethane type thickener |
| 120V | The LG-DOW chemical industry | The polyacrylic acid dipersant |
| CF-10 | The LG-DOW chemical industry | Wetting agent |
| SN154 | Japan Nuo Puke | The organosiloxane defoamer |
| CF246 | Beijing Sai Deli Science and Technology Ltd. | The grease defoamer |
| BS-16 | Germany Wa Ke company | The organosilicon pH adjusting agent |
| BS-1001 | Germany Wa Ke company | The organic silicon hydrophobic agent |
| WD60 | Beijing An Tepuna company | Silane coupler |
| BIT20 | Chinese Shanghai Ou Mo chemical industry | Bactericide |
| ROCIMA350 | U.S. Rohm﹠Haas company | Mould inhibitor |
| The dodecane alcohol ester | The general industry product | Coalescents |
| Ethylene glycol | The general industry product | Solvent |
| Deionized water |
Embodiment 2
Be used to form following being prepared of the first coating composition of hydrophobicity scratch coat.
Under 350-450rpm/ minute stirring at low speed, add 200g deionized water and thickener HEC 250HBR, dispersing agent 120V, wetting agent CF-10, defoamer SN154, pH adjusting agent BS-16 in the agitator, and stirred 5-10 minute, thereby evenly.Then in mixture, add titanium dioxide R298, CELITE530, GF117, TA-800 and deionized water, and with 800-1250rpm/ minute high-speed stirred 20-30 minute, thereby uniform sizing material formed.At last under 500-700rpm/ minute middling speed stirring, in uniform sizing material, add defoamer CF-246, ethylene glycol, dodecane alcohol ester, organic silicon hydrophobic agent BS-1001, emulsion combination (using the combination of pure acrylate emulsion 2133 and cinnamic acrylic ester emulsion RS-998A), BIT20 bactericide, W350 mould inhibitor, thickener 278, silane coupler WD60 and remaining part deionized water, until evenly, thereby form the first coating composition.The amounts specified of each component in the coating composition of embodiment 2 is in table 4.
Table 4: the composition and the performance thereof that are used to form the second coating composition of hydrophobicity scratch coat
Be can clearly be seen that by above table 4 result, the water based emulsion that is used to form the coating composition of hydrophobicity scratch coat has the suitably low equal particle diameter of z, and have hydrophobicity and certain porosity by the scratch coat that this coating composition forms, wherein permeability rate is 0.2mL/24 hour, thereby this scratch coat can produce the air-permeable, hydrophobic effect.And adopt the permeability rate of the coating that traditional common coating composition obtains not ideal, can't obtain the hydrophobic, air-permeability that the present invention obtains.
Finishing coat
Forming the raw material that comprises in the coating composition of heat reflectivity finishing coat is listed in as in the following table 3.
Table 5
| Trade name | Supplier/distributors | Describe |
| GD56 | Henkel Corp. | The pure acrylate emulsion |
| LJTF-01 | Guangzhou joins clean trade Co., Ltd | Hollow ceramic microspheres |
| W-610 | Minnesota Mining and Manufacturing Company | The solid ceramic microballoon |
| R706 | E.I.Du Pont Company | The rutile titanium white powder |
| 499 | Yuyao City chemical company's tomorrow | Kieselguhr |
| HEC 250HBR | U.S. Aqualon Company | The cellulose ethers thickener |
| Rheotech 3500 | Coatex company | Alkali swelling type thickener |
| 731A | U.S. Rohm﹠Haas company | The polyacrylic acid dipersant |
| SN154 | Japan Nuo Puke | The organosiloxane defoamer |
| 122NS | Japan Nuo Puke | The grease defoamer |
| CF246 | Beijing Sai Deli Science and Technology Ltd. | The grease defoamer |
| BS-16 | Germany Wa Ke company | The organosilicon pH adjusting agent |
| WD60 | Beijing An Tepuna company | Silane coupler |
| A203 | Sky, Guangzhou occasion microorganism Co., Ltd | Bactericide |
| FA39 | Singapore PCTS | Mould inhibitor |
| The dodecane alcohol ester | The general industry product | Coalescents |
| Propane diols | The general industry product | Solvent |
| Deionized water |
Embodiment 3
Be used to form following being prepared of coating composition of heat reflectivity finishing coat.
Under 350-450rpm/ minute stirring at low speed, in agitator, add 160g deionized water and thickener HEC 250HBR, dispersing agent 731A, 12g defoamer SN154 and 2g defoamer 122NS, pH adjusting agent BS-16, and stirred 5-10 minute, thereby evenly.Then in mixture, add titanium dioxide R706, kieselguhr 499, solid ceramic microballon W-610, hollow ceramic microspheres LJTF-01 and deionized water, and with 800-1250rpm/ minute high-speed stirred 20-30 minute, thereby uniform sizing material formed.At last under 500-700rpm/ minute middling speed stirring, in uniform sizing material, add 4g defoamer CF-246 and 2g defoamer SN 154, dodecane alcohol ester, A203 bactericide, FA39 mould inhibitor, pure acrylate emulsion GD56, thickener COATEX 3500, propane diols, silane coupler WD 60 and remaining part deionized water, until evenly, thereby form the second coating composition.The amounts specified of each component in the second coating composition of embodiment 2 is in table 6.
Table 6: the composition and the performance thereof that are used to form the second coating composition of heat reflectivity finishing coat
Be can clearly be seen that by above table 6 result, the coating composition of embodiment 3 contains the heat reflection fillers such as hollow ceramic microspheres, solid ceramic microballon and rutile titanium white powder, and has the heat-flash reflectivity by the scratch coat that this coating composition forms.
The hydrophily skin coat
Forming the raw material that comprises in the coating composition of hydrophily skin coat is listed in as in the following table 7.
Table 7
Embodiment 4
The coating composition that is used to form the hydrophily skin coat can be prepared by following.Under 350-450rpm/ minute stirring at low speed, in agitator, add deionized water, nano titanic oxide sol SL101, optional stabilizing agent FT-100 and optional defoamer SN154, and stir, thereby obtain coating composition for the hydrophily skin coat.
Perhaps, can be directly as the coating composition that forms the hydrophily skin coat available from the nano titanium oxide complex sol SL101 (wherein the solid content of this colloidal sol is in the scope of 0.1 to 5 % by weight) of name paddy science and technology.
Be used to form the amounts specified of each component in the coating composition of hydrophily skin coat in table 8.
Table 8: the composition and the performance thereof that are used to form the coating composition of hydrophily skin coat
Be can clearly be seen that by above table 8 result, the coating composition that is used to form the hydrophily skin coat contains titanium dioxide, and has self-cleaning property by the hydrophily skin coat that this coating composition forms.
Coating system
Choose respectively three cities with characteristic feature in East China, south China, North China: Shanghai, Guangzhou, Beijing.Wherein, body of wall Class1 (k=0.857w/m2.K) is adopted in Beijing and District of Shanghai design, and In Guangzhou Area is then selected the higher body of wall type 2 (k=1.413w/m2.K) of another thermal transmittance.Coating system of the present invention (comprising scratch coat, finishing coat and hydrophily skin coat) is applied on the external surface of exterior wall, then measures the thermal transmittance of gained exterior wall.Test result is listed in the table 9.
The comparative result of the thermal transmittance of the exterior wall of table 9. coating and uncoated coating system of the present invention
| The area | Coating layer system not | The wall face of exterior wall |
| Shanghai | 1.083w/m2.K | 0.857w/m2.K |
| Beijing | 1.083w/m2.K | 0.857w/m2.K |
| Guangzhou | 1.643w/m2.K | 1.413w/m2.K |
By above result as seen, compare with the body of wall of uncoated coating system, the body of wall that is coated with coating system of the present invention on it has the thermal transmittance of obvious reduction.That is, be coated with the thermal transmittance of body of wall of coating system of the present invention almost near design load.
In addition, as described in part of detecting, the exterior wall that external metope is coated with coating system of the present invention carries out annual energy consumption testing.The results are shown in the table 10.
The comparative result of the simulation energy-saving efficiency of the exterior wall of table 10. coating and uncoated coating system of the present invention
| The area | Benchmark (GJ) | Wall outer side (GJ) | Annual simulation fractional energy savings |
| Shanghai | 24.88 | 21.47 | 15.41％ |
| Beijing | 36.5 | 34.3 | 6.03％ |
| Guangzhou | 29.15 | 22.54 | 22.68％ |
By above result as seen, coating system of the present invention has significant energy-saving effect.In particular, at building energy consumption mainly take the summer air-conditioning cooling as main area, Guangzhou for example, energy-saving efficiency is more remarkable.
And above coating system when measuring according to stain resistance test method GB/T9780, only has 5% average reflectance decline; And, applied by oleic acid, and be 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation only have the Static Water contact angles of 15 degree after 24 hours.That is to say, coating system of the present invention also has excellent automatically cleaning characteristic.
This shows, the coating system that contains hydrophobicity scratch coat, heat-reflecting surface coating and hydrophily skin coat of the present invention not only has excellent heat-proof quality and also has outstanding automatically cleaning characteristic.And, because the existence of self-cleaning property skin coat, even if coating system long term exposure of the present invention still can keep its excellent heat-proof quality in external environment.
Although the present invention is described with reference to a large amount of embodiments and embodiment, those of ordinary skills can recognize according to content disclosed by the invention can design other embodiment, and this does not break away from protection scope of the present invention and spirit.
Claims (24)
1. an exterior wall is with automatically cleaning heat insulating coat system, and it comprises:
(a) the hydrophobicity scratch coat that is formed by the first coating composition, wherein said the first coating composition comprises water based emulsion, and the permeability rate of described scratch coat is 0.3mL/24 hour at the most;
(b) the heat reflectivity finishing coat that is formed by the second coating composition, wherein said the second coating composition comprises the heat reflection filler, and the sun reflectivity of described finishing coat is at least 85%, and/or the hemisphere transmitting ratio is at least 85%; With
(c) be coated in the hydrophily skin coat that is formed by the 3rd coating composition on the described heat reflectivity finishing coat, wherein said the 3rd coating composition comprises nano titanium oxide and aqueous solvent.
2. exterior wall as claimed in claim 1 is with automatically cleaning heat insulating coat system, wherein, described skin coat, when measuring according to stain resistance test method GB/T9780, have 10% or less average reflectance descend, and/or, described skin coat is being applied by oleic acid, and is 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation have 15 degree or less Static Water contact angles after 24 hours.
3. exterior wall as claimed in claim 1 is with automatically cleaning heat insulating coat system, and wherein, described skin coat when measuring according to stain resistance test method GB/T9780, has 5% or less average reflectance decline.
4. exterior wall as claimed in claim 1 is with automatically cleaning heat insulating coat system, and wherein, described skin coat is being applied by oleic acid, and is 2.0mW/cm in intensity
2, wavelength 340nm UV light under irradiation have 10 degree or less Static Water contact angles after 24 hours.
5. exterior wall as claimed in claim 1 is with automatically cleaning heat insulating coat system, and wherein, described skin coat has the build that the theory of 0.2-2 micron is calculated.
6. exterior wall as claimed in claim 1 is with automatically cleaning heat insulating coat system, and wherein, the sun reflectivity of described finishing coat is at least 88%, and/or the hemisphere transmitting ratio is at least 87%.
7. exterior wall as claimed in claim 1 is with automatically cleaning heat insulating coat system, and wherein, the permeability rate of described scratch coat is less than or equal to 0.2mL/24 hour.
Such as the described exterior wall of any one in the claim 1 to 7 with cleaning heat insulating coat system, wherein, the described water based emulsion in described the first coating composition comprises the equal particle diameter of z and is the polymer beads of 200nm at the most.
9. such as the described exterior wall of any one in the claim 1 to 7 automatically cleaning heat insulating coat system, wherein, the described water based emulsion in described the first coating composition comprises organosilicon water based emulsion, cinnamic acrylic ester water based emulsion, pure acrylate water based emulsion, organic-silicon-modified acrylic ester aquosity latex, vinylacetate water based emulsion, vinyl acetate-acrylate water based emulsion, vinylacetate-ethene water based emulsion, ethylene-vinyl acetate water based emulsion, vinyl acetate-acrylate-tertiary carbon acid esters water based emulsion or its combination.
10. such as the described exterior wall of any one in the claim 1 to 7 automatically cleaning heat insulating coat system, wherein, described the first coating composition comprises, based on the gross weight of described the first coating composition,
The described water based emulsion of 30 to 90 % by weight;
The filler of 10 to 55 % by weight;
0.5 the organic silicon hydrophobic agent to 2.5 % by weight; With
The additional additives of 0 to 20 % by weight, wherein said additional additives comprise thickener, dispersing agent, wetting agent, defoamer, pH adjusting agent, solvent, coalescents, bactericide, mould inhibitor, coupling agent or its any combination.
11. exterior wall as claimed in claim 10 automatically cleaning heat insulating coat system, wherein, described the first coating composition comprises, with respect to the gross weight of described the first coating composition,
The cinnamic acrylic ester water based emulsion of 10 to 50 % by weight;
The pure acrylate water based emulsion of 10 to 50 % by weight;
The described filler of 10 to 55 % by weight;
0.5 the described organic silicon hydrophobic agent to 2.5 % by weight; With
0.1 to the described additional additives of 15 % by weight, described additional additives comprises thickener, dispersing agent, wetting agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor, coupling agent or its any combination.
12. such as the described exterior wall of any one in the claim 1 to 7 automatically cleaning heat insulating coat system, wherein, the described heat reflection filler in described the second coating composition comprises ceramic fine bead, titanium dioxide and combination thereof.
13. exterior wall as claimed in claim 12 automatically cleaning heat insulating coat system, wherein, described ceramic fine bead comprises solid ceramic microballon, hollow ceramic microballon or its combination.
14. exterior wall as claimed in claim 12 automatically cleaning heat insulating coat system, wherein, described titanium dioxide comprises rutile titanium dioxide.
15. such as the described exterior wall of any one in the claim 1 to 7 automatically cleaning heat insulating coat system, wherein, described the second coating composition comprises, based on the gross weight of described the second coating composition,
The water based emulsion of 30 to 80 % by weight;
The described heat reflection filler of 20 to 40 % by weight;
The additional additives of 0 to 40 % by weight, wherein said additional additives comprise additional filler, thickener, dispersing agent, defoamer, pH adjusting agent, coalescents, solvent, bactericide, mould inhibitor, coupling agent or its any combination.
16. such as the described exterior wall of any one in the claim 1 to 7 automatically cleaning heat insulating coat system, wherein, the described nano titanium oxide in described the 3rd coating composition has photocatalytic activity.
17. such as the described exterior wall of any one in claim 1 to 7 and 16 automatically cleaning heat insulating coat system, wherein, described the 3rd coating composition comprises, based on the gross weight of described the 3rd coating composition,
0.05 the described nano titanium oxide to 20wt%;
60 to 99.95wt% aqueous solvent; With
0 to 20wt% additional additives, described additional additives comprise dispersing agent, pH adjusting agent, defoamer, coalescents, bactericide, mould inhibitor or its any combination.
18. such as the described exterior wall of any one in the claim 1 to 7 automatically cleaning heat insulating coat system, also comprise the hydrophobicity putty layer that is formed by the 4th coating composition that is arranged under the described hydrophobicity scratch coat, described the 4th coating composition comprises the organic silicon hydrophobic agent, and described hydrophobicity putty layer has the at the most water absorption rate of 1.6g/10min.
19. exterior wall as claimed in claim 18 automatically cleaning heat insulating coat system, wherein, described the 4th coating composition comprises, with respect to the gross weight of described the 4th coating composition,
20 to 40wt% cementing agent, described cementing agent comprises finished ground cement and organic polymer;
40 to 78wt% filler;
0.1 the described organic silicon hydrophobic agent to 10wt%; With
0 to 10wt% additional additives, described additional additives comprise thickener, water-loss reducer, anticorrisive agent, antifreeze, slipping agent, water reducing agent or its any combination.
20. such as the described exterior wall of any one in the claim 1 to 19 automatically cleaning heat insulating coat system, wherein, described exterior wall comprises following constructional materials, and described constructional materials comprises concrete block, gypsum plank, sandlime brick, gas concrete, composite light-weight scutum, cement fibrolite plate and any combination thereof.
21. such as the described exterior wall of any one in the claim 1 to 20 automatically cleaning heat insulating coat system, wherein, wall face is coated with the thermal transmittance of the exterior wall of described coating system, compares with the thermal transmittance of the exterior wall of uncoated described coating system, has descended at least 12%.
22. such as the described exterior wall of any one in the claim 1 to 20 automatically cleaning heat insulating coat system, wherein, wall face is coated with the exterior wall of described coating system, compare with the exterior wall of uncoated described coating system, under the meteorological condition in Guangzhou, has at least 20%/annual simulation energy-saving efficiency, perhaps under the meteorological condition in Shanghai, have at least 15%/annual simulation energy-saving efficiency, perhaps under Pekinese's meteorological condition, have at least 6%/annual simulation energy-saving efficiency.
23. method that is coated with exterior wall, described method comprises: the described exterior wall of any one in the claim 1 to 22 is applied on the wall face of described exterior wall with automatically cleaning heat insulating coat system, thereby obtains being coated with the exterior wall of described automatically cleaning heat insulating coat system.
24. method as claimed in claim 23, wherein, described exterior wall comprises following constructional materials, and described constructional materials comprises concrete block, gypsum plank, sandlime brick, gas concrete, composite light-weight scutum, cement fibrolite plate and any combination thereof.
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| CN103788778A (en) * | 2014-02-10 | 2014-05-14 | 广东华兹卜化学工业有限公司 | Antifouling and heat-insulating outer wall paint |
| CN105086560A (en) * | 2014-05-20 | 2015-11-25 | 广东华润涂料有限公司 | Thermal reflectivity, imitation stone effect coating system |
| CN107629650A (en) * | 2017-09-07 | 2018-01-26 | 广州市泰宇科技发展有限公司 | A kind of self-cleaning paint, its preparation method and application method for ceramic tile substrate |
| CN107674482A (en) * | 2017-10-16 | 2018-02-09 | 厦门广福鑫实业有限公司 | Cleaning material and its application method in a kind of metal works spraying coating process |
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| CN103788778A (en) * | 2014-02-10 | 2014-05-14 | 广东华兹卜化学工业有限公司 | Antifouling and heat-insulating outer wall paint |
| CN105086560A (en) * | 2014-05-20 | 2015-11-25 | 广东华润涂料有限公司 | Thermal reflectivity, imitation stone effect coating system |
| CN105086560B (en) * | 2014-05-20 | 2018-10-26 | 广东华润涂料有限公司 | Heat reflectivity, imitation stone effect coating system |
| CN107629650A (en) * | 2017-09-07 | 2018-01-26 | 广州市泰宇科技发展有限公司 | A kind of self-cleaning paint, its preparation method and application method for ceramic tile substrate |
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| CN107674482B (en) * | 2017-10-16 | 2019-08-09 | 厦门广福鑫实业有限公司 | Cleaning material and its application method in a kind of metal works spraying process |
| CN111171641A (en) * | 2020-01-20 | 2020-05-19 | 广东施彩新材料科技有限公司 | Double-layer structured photocatalytic environment-friendly coating and preparation method thereof |
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| CN114195425A (en) * | 2021-12-09 | 2022-03-18 | 浙江农林大学 | Efficient multipurpose gypsum-based material additive |
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