CN103087619B - Coating material and method for forming coating layer - Google Patents
Coating material and method for forming coating layer Download PDFInfo
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- CN103087619B CN103087619B CN201110404781.7A CN201110404781A CN103087619B CN 103087619 B CN103087619 B CN 103087619B CN 201110404781 A CN201110404781 A CN 201110404781A CN 103087619 B CN103087619 B CN 103087619B
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Landscapes
- Paints Or Removers (AREA)
Abstract
The invention provides a paint and a method for forming a coating, wherein the method comprises the following steps: mixing 50 to 70 parts by weight of an aqueous binder with 100 to 250 parts by weight of water to form a first coating; adding 30-50 parts by weight of high-floating metal filler into the first coating, and stirring and mixing to form a second coating; coating the second coating on the substrate; and removing the water in the second dope to form a coating layer.
Description
Technical field
The present invention relates to a kind of water-based low infrared emitting rate coating, more specifically, the present invention relates to described system component, formation method and application.
Background technology
At present, although water-based commercially available both at home and abroad low infrared emitting rate coating possesses low infrared emitting rate, because the relation of Design and material, the feature of environmental protection is far away less than other environmental protection low-carbon coating.Low infrared emitting rate coating commercially available at present take oil paint as main flow, and its solvent is toluene, and volatile organic compounds (VOC) concentration is far above 660g/L.So far, only have SOLEC company of the U.S. to develop to have the low infrared emission coating LO/MIT-II of aqueous base, its volatile organic compounds (VOC) concentration is about 170g/L, but still cannot meet the demand of low VOC environmental protection coating material.Current promotion Diamond Search coating (~ 1g/L) or low VOC coatings (< 30g/L) are still difficult to realize in low infrared emitting rate paint field.Major cause be coating after Water-borne modification, its metallic stuffing subjects to severe oxidation, also can get angry in aqueous and cause coating to bubble.So commercially available prod is based on oil paint.In order to develop water-based low infrared emitting rate coating, industry develops water-proof metal filler, such as, at metallic stuffing surface coated upgrading organic or inorganic thin layer.Experimentally test result, its waterproof gas-forming property has it to limit to, simultaneously also can the reflection potential of sacrificial metal filler, makes coatings emissivity higher.The another kind of practice is exploitation water-repellancy cakingagent, such as water-based silicon emulsion (silica emulsion), this kind of water-based cakingagent uses the first clad metal filler of oiliness polymeric silicon monomer to make its infrared transparent, and follow-up foaming can be avoided, then acid adding make oiliness polymer change into wetting ability or be emulsified into half oil semi-aqueous, become water-borne coatings.Although product is water-base resin, source is still oiliness monomer, and its VOC is still very high.
In sum, need a kind of new infrared transparent water-base resin collocation metallic stuffing at present badly, do not get angry to reach simultaneously, the requirement of high reverse--bias and low VOC.
Summary of the invention
One embodiment of the invention provides a kind of coating, comprising: the water-based cakingagent of 70 weight part to 50 weight parts; The high floating metal filler of 30 to 50 weight parts; And 100 water of weight part to 250 weight part.
One embodiment of the invention provides a kind of formation method of coating, comprising: mix the water-based cakingagent of 50 weight part to 70 weight parts and the water of 100 weight part to 250 weight parts, form the first coating; Be uniformly mixed after the high floating metal filler of 30 to 50 weight parts is added the first coating, form the second coating; By the second coatings on base material; And the water removed in the second coating, to form coating.
Accompanying drawing explanation
Fig. 1-2 is the schematic diagram of one embodiment of the invention floating coat.
Embodiment
Low red line emittance coating of putting of the present invention is the loss of a kind of reduction infrared emanation, reaches the environmentfriendly products of energy-saving effect.This coating can be used for the surface of various heating container as boiler or thermos cup, to reduce radiation heat loss, or applies to the occasion such as automobile and building energy conservation.Heat source temperature is higher, and diminishbb radiant heat is more obvious.
First, coating is required to be environmental protection and energy saving coating and possesses low environment contaminative (low VOC).Except energy-saving and emission-reduction, also can by greenhouse gases CO
2convert novel material to, normal method is the CO caught with carbon
2make PCDL (APC) for raw material and develop non-different hydrogen acid ether urethane NIPU).This kind of aliphatic polycarbonate APC-PU has good low temperature kindliness, oxidation-resistance and biological degradability, has nontoxic, good moisture-resistant sensitivity, hydrolysis, chemical resistant properties and permeability resistance compared with conventional P U.Add polycarbonate polyol on PU, also there is the transparency, excellent physical strength and resistance to UV function, contribute to application of paints on green building.Utilize the above-mentioned environmental protection PCDL of polyurethane dispersions (PUD) grafting of this kind of NIPU synthesis, namely form polycarbonate-polyurethane (PC-PU) water-base resin, can be used as the main composition of the water-based cakingagent of coating of the present invention.Above-mentioned PC-PU multipolymer can be commercial goods, as the PUD (BAYHYDROL XP2546) purchased from Bayer.In addition, also can with reference to the article of Vanesa Garcia-Pacios or Xia Jiang (Progress in OrganicCoatings 71 (2011) 136-146, European Polymer Journal 43 (2007) 1838-1846), the PC-PU multipolymer of preparation water-based.In an embodiment of the present invention, PC-PU multipolymer is line-type block polymer, and noncrosslinking network copolymer, the unsaturated functional group reducing height produces strong infrared absorption peak, has strong absorption group to avoid infrared band scope.The weight average molecular weight of above-mentioned PC-PU multipolymer is about between 50000 to 200000.If the weight average molecular weight of PC-PU multipolymer is too high, then physical property is deteriorated.If the weight average molecular weight of copolymer p C-PU is too low, then film tack is deteriorated.In addition, in PC-PU multipolymer, the mol ratio of the OH base of PC segment (soft chain segment) and the NCO base of PU segment (hard segment) is about between 1: 0.9 to 1: 1.1.If the ratio of PC segment is too high, then coating machine is deteriorated.If the ratio of PC segment is too low, then reduce the less able easy foaming of water-intake rate.
Except above-mentioned environmental protection, waterproof and reduce metallic stuffing and to get angry etc. except advantage, main composition such as the PC-PU multipolymer of water-based cakingagent also possesses high IR transparency (or infrared low absorption).Because PC-PU multipolymer is at the characteristic peak of 1110cm-1 wave band not-C-O-key, so IR transparency is better.For example, PC-PU multipolymer in the transparency of 2.5 ~ 25 μm of infrared sections about more than 90%.In an embodiment of the present invention, adopt the PC-PU multipolymer of nanometer particle size (between 1nm to 100nm) further, the transparency of its infrared section can up to 95%, far above 50 ~ 60% of conventional P U resin.Must it should be noted that at this, the emittance (α) (being also specific absorption (ε)) of low infrared emission coating as shown in Equation 1:
α=ε=1-R-T (formula 1)
In formula 1, R is the reflectivity of metallic stuffing in coating, and T is the penetration coefficient of cakingagent in coating.Be understandable that, absorbed by cakingagent when the infrared ray radiation coating of thermal source but not penetrate over, then radiant heat energy will accumulate in coating.Thus, after coating material temperature improves, infrared rays (i.e. heat energy) will be given off towards other direction.On the other hand, if the infrared reflection rate of metallic stuffing is not good, heat energy also can accumulate in coating.In other words, the emittance (α) of coating is more low better with specific absorption (ε), and optimal situation, after the infrared rays of thermal source directly passes the cakingagent in coating, is reflected back thermal source, and can not accumulates in coating by metallic stuffing.
In an embodiment of the present invention, water-based cakingagent, except above-mentioned PC-PU multipolymer, also can comprise other additive as wetting agent, defoamer and/or flow agent.The weight ratio of PC-PU multipolymer and these additives is about between 95: 5 to 90: 10.
In an embodiment of the present invention, after the water-based cakingagent getting 70 weight part to 50 weight parts mixes with 100 weight part to 250 weight parts waters, the higher floating metal filler of 30 weight part to 50 weight parts is added.Must it should be noted that at this, the consumption of water is 1 to 2.5 times of water-based cakingagent and high floating metal filler gross weight, and namely the gross weight of water-based cakingagent and high floating metal filler is 100 weight parts.If the consumption of water-based cakingagent too high (namely the consumption of high floating metal filler is too low), then the too low emittance that causes of infrared reflectance is higher.If the consumption of water-based cakingagent too low (namely the consumption of high floating metal filler is too high), then partially crisp, the thermo-labile stress of coating and sticking power not good.Above-mentioned high floating metal filler can be the leaf sheet metal of size between 8 μm to 40 μm to have best scattering power.If high floating metal filler is undersized, then scattering power declines (Rayleigh-scattering) fast.If high floating metal filler is oversize, then reflection potential also can reduce gradually.Its floatability of high floating metal filler in coating is between 70% to 100%.If its floatability of high floating metal filler in coating is too low, then cannot usable reflection infrared rays.Fig. 1 is the schematic diagram of one embodiment of the invention floating coat.After coatings is on base material 11, dry in the shade and coating of annealing to remove the water in coating, namely formed coating 100.Base material 11 can be metal, glass, plastics or other common substrate material.In coating 100, high floating metal filler 15 floats on water-based cakingagent 13.So, high floating metal filler 15 can usable reflection infrared rays 17.Be understandable that, if base material 11 itself is thermal source, the infrared rays of bottom incidence, after the water-based cakingagent 13 passing low infrared ray absorption, also can be reflected by high floating metal filler 15, after through the water-based cakingagent of low infrared ray absorption, get back to base material 11.If its floatability of metallic stuffing in coating is too low, then can form the coating 100 ' shown in Fig. 2.Now, infrared rays 17 will hole between the metallic stuffing 15 ' of drill-through low its floatability, arrives base material 11.Be understandable that, if base material 11 itself is thermal source, the infrared rays of bottom incidence also can hole between the metallic stuffing 15 ' of drill-through low showy rate, the upper surface of injection coating 100 '.
In an embodiment of the present invention, the electronegativity of high floating metallic stuffing is between 1.1 to 1.9.If the electronegativity of high floating metallic stuffing is too high, then easily produces oxidizing reaction, lose the reflectivity of metal.But, when the electronegativity of the floating metallic stuffing of height is too low, then easily there is reduction reaction, lose metallic reflective.The material of this high floating metal filler can be copper, aluminium, iron, nickel, manganese, zinc, above-mentioned mixture or above-mentioned alloy.In an embodiment of the present invention, high floating metal filler can be purchased from Seedchem CompanyPTY.LTD.
Equally as shown in Figure 1, after water-based cakingagent 13 and water (not shown) are mixed into the first coating, then add high floating metal filler 15 and be uniformly mixed formation second coating.In an embodiment of the present invention, step is uniformly mixed between 200rpm to 300rpm after adding high floating metal filler.If the speed be uniformly mixed is too high, then the high floating metal filler of high velocity impact can be combined into oversize metallic stuffing and reduce its floatability.If the speed be uniformly mixed is too low, high floating metal filler cannot be dispersed in the first coating.Then by the second coatings on base material 11, then remove water in the second coating than forming coating 100.In an embodiment of the present invention, the method removing the water in the second coating can be dries in the shade for some time at 25 DEG C, makes high floating metal filler floating.In an alternative embodiment of the invention, 30 minutes to 2 hours can be annealed to guarantee to remove the water in the second coating completely with 90 DEG C to 110 DEG C further.Annealing process can improve coating densification degree and conductance, also makes residual solvent vapor away from coating simultaneously, promotes cakingagent transparency.If the time of annealing process is too short and/or temperature is too low, aqueous vapor may be caused to volatilize and coating structure densification deficiency.If the overlong time of annealing process and/or temperature too high, then coating is easily oxidized and loses reflectivity.So far namely complete water-based required for the present invention, low VOC, with the coating of low infrared emissivity.Confirm through experiment, the infrared emitting rate of coating of the present invention is only between 0.2 to 0.25, far below 0.4 to 0.6 of commercially available prod.
In order to make above and other objects of the present invention, feature and advantage become apparent, hereafter coordinating accompanying drawing especially exemplified by several embodiment, being described in detail below:
Embodiment
Comparative example 1
Get the methyl methacrylate (MMA of 15 weight parts, Aldrich) with the vinylformic acid (AA of 2.8 weight parts, Acros organic) as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, then remove dimethylbenzene and methylethylketone formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) of this coating is 0.44 (emittance tester TSS-5X, Japan SensorCorporation).The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 2
Get the methyl methacrylate (MMA of 15 weight parts, Aldrich), the vinylformic acid (AA of 2.8 weight parts, Acros organic), with the silicon-dioxide emulsion of 3.3 weight parts (the flourish international corporation/WS-01 in Xinchang) as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, then remove dimethylbenzene and methylethylketone formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.45 to 0.47 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 3
Get the polymethylmethacrylate (PMMA of 15 weight parts, Seedchem company 08822), with the acetic acid of 2.8 weight parts as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, then remove dimethylbenzene and methylethylketone formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.51 to 0.56 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 4
Get the polymethylmethacrylate (PMMA of 6 weight parts, Seedchem company 08822), methyl methacrylate (the MMA of 9 weight parts, Aldrich), with the vinylformic acid (AA of 2.8 weight parts, Acros organic) as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, dimethylbenzene and methylethylketone formation coating is removed again with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan SensorCorporation) between 0.54 to 0.56 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 5
Get the polymethylmethacrylate (PMMA of 15 weight parts, Seedchem company 08822), with the Polyglycolic acid fibre (PEDOT of 15 weight parts, UR-PH1000) as cakingagent, after adding the water of 8 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, then remove dimethylbenzene and methylethylketone formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.81 to 0.83 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 6
Get the methyl methacrylate (MMA of 15 weight parts, Aldrich), the polyvinyl alcohol (PVA of 3.3 weight parts, Merck), with the vinylformic acid (AA of 2.8 weight parts, Acros organic) as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, then remove dimethylbenzene and methylethylketone formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.53 to 0.57 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 7
Get the methyl methacrylate (MMA of 15 weight parts, Aldrich), the Diisopropyl azodicarboxylate (AIBN) of 0.15 weight part, polyvinyl alcohol (the PVA of 3.3 weight parts, Merck), with the vinylformic acid (AA of 2.8 weight parts, Acros organic) as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, dimethylbenzene and methylethylketone formation coating is removed again with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.52 to 0.54 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 8
Get the methyl methacrylate (MMA of 9 weight parts, Aldrich), the Diisopropyl azodicarboxylate (AIBN) of 0.15 weight part, polymethylmethacrylate (the PMMA of 6 weight parts, Seedchem company 08822), with the vinylformic acid (AA of 2.8 weight parts, Acros organic) as cakingagent, after adding the dimethylbenzene of 4 weight parts and the methylethylketone mixing of 4 weight parts, formation coating is uniformly mixed after adding the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) of 1.2 weight parts again, dry in the shade after coating base material 8 hours, dimethylbenzene and methylethylketone formation coating is removed again with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.52 to 0.54 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 9
Get the PC-PU multipolymer (PENTENS NPU-12A) of 70 weight parts as cakingagent, after adding the water mixing of 100 weight parts, the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) adding 30 weight parts is again uniformly mixed rear formation coating, dry in the shade after coating base material 8 hours, then remove water formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.43 to 0.46 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Comparative example 10
Get the PC-PU multipolymer (PENTENS NPU-12A) of 60 weight parts as cakingagent, after adding the water mixing of 100 weight parts, the general aluminium powder (the flourish international corporation/FAL-02 in Xinchang) adding 40 weight parts is again uniformly mixed rear formation coating, dry in the shade after coating base material 8 hours, then remove water formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) (emittance tester TSS-5X, Japan Sensor Corporation) between 0.41 to 0.43 of this coating.The formula of above-mentioned coating and the specific absorption of coating as shown in table 1.
Because the reflectivity of general aluminium powder is not strong, be easy to the difference of the IR transparency comparing cakingagent.The cakingagent that IR transparency character is better, emittance is lower.As shown in table 1, acrylic acid polymer, PVC, silicon-dioxide emulsion is all less than PC-PU multipolymer, and its performance is comparatively close to the infrared transparent effect of MMA monomer.
Table 1
| Comparative example | Formula | Specific absorption (ε) |
| 1 | (dimethylbenzene+methylethylketone)+Al+MMA+AA | 0.44 |
| 2 | (dimethylbenzene+methylethylketone)+Al+MMA+AA+ silicon-dioxide emulsion | 0.45～0.47 |
| 3 | (dimethylbenzene+methylethylketone)+Al+PMMA (1)+acetic acid | 0.51～0.56 |
| 4 | (dimethylbenzene+methylethylketone)+Al+MMA+AA+PMMA | 0.54～0.56 |
| 5 | (dimethylbenzene+methylethylketone)+Al+PEDOT+PMMA | 0.81～0.83 |
| 6 | (dimethylbenzene+methylethylketone)+Al+MMA+AA+PVA | 0.53～0.57 |
| 7 | (dimethylbenzene+methylethylketone)+Al+MMA+ALBN+AA+PVA | 0.52～0.54 |
| 8 | (dimethylbenzene+methylethylketone)+Al+MMA+ALBN+AA+PMMA | 0.52～0.54 |
| 9 | (water)+30%Al+ water-based PC-PU | 0.43～0.46 |
| 10 | (water)+40%Al+ water-based PC-PU | 0.41～0.43 |
Embodiment 1
Get the PC-PU multipolymer (PENTENS NPU-12A) of 80 weight parts as cakingagent, after adding the water mixing of 100 weight parts, add the floating Al filler of height (70% its floatability of 20 weight parts again, flourish international corporation/the AL101 in Xinchang) be uniformly mixed rear formation coating, dry in the shade after coating base material 8 hours, then remove water formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) of this coating is 0.38 (emittance tester TSS-5X, Japan Sensor Corporation).The formula of above-mentioned coating and the specific absorption of coating as shown in table 2.
Embodiment 2
Get the PC-PU multipolymer (PENTENS NPU-12A) of 80 weight parts as cakingagent, after adding the water mixing of 100 weight parts, add the floating Al filler of height (73% its floatability of 20 weight parts again, the AL1041 of SeedchemCompany) be uniformly mixed rear formation coating, dry in the shade after coating base material 8 hours, then remove water formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) of this coating is 0.27 (emittance tester TSS-5X, Japan Sensor Corporation).The formula of above-mentioned coating and the specific absorption of coating as shown in table 2.
Embodiment 3
Get the PC-PU multipolymer (PENTENS NPU-12A) of 80 weight parts as cakingagent, after adding the water mixing of 100 weight parts, add the floating Al filler of height (93% its floatability of 20 weight parts again, the AR1001 of SeedchemCompany) be uniformly mixed rear formation coating, dry in the shade after coating base material 8 hours, then remove water formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) of this coating is 0.25 (emittance tester TSS-5X, Japan Sensor Corporation).The formula of above-mentioned coating and the specific absorption of coating as shown in table 2.
Embodiment 4
Get the PC-PU multipolymer (PENTENS NPU-12A) of 70 weight parts as cakingagent, after adding the water mixing of 100 weight parts, add the floating Al filler of height (93% its floatability of 30 weight parts again, the AR1001 of SeedchemCompany) be uniformly mixed rear formation coating, dry in the shade after coating base material 8 hours, then remove water formation coating with the tempering process of 100 DEG C.The infrared ray absorption rate (ε) of this coating is 0.23 (emittance tester TSS-5X, Japan Sensor Corporation).The formula of above-mentioned coating and the specific absorption of coating as shown in table 2.Compare with comparative example 1-10, adopt high floating Al filler collocation PC-PU multipolymer effectively can reduce the infrared ray absorption rate (ε) of coating.
Table 2
| Embodiment | Formula | Specific absorption (ε) |
| 1 | (water)+20%Al (70%leafing)+80%PC-PU | 0.38 |
| 2 | (water)+20%Al (73%leafing)+80%PC-PU | 0.27 |
| 3 | (water)+20%Al (93%leafing)+80%PC-PU | 0.25 |
| 4 | (water)+30%Al (93%leafing)+70%PC-PU | 0.23 |
Although the present invention with several preferred embodiment openly as above; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; can change and change, therefore protection scope of the present invention is as the criterion when defining with appended claims.
Claims (11)
1. a coating, comprising:
The water-based cakingagent of 70 weight part to 50 weight parts, wherein this water-based cakingagent comprises the line-type block polymer of a polycarbonate-polyurethane, its weight average molecular weight is between 50000 to 20000, and the mol ratio of polycarbonate and urethane is between 1:0.9 to 1:1.1;
The high floating metal filler of 30 weight part to 50 weight parts; And
The water of 100 weight part to 250 weight parts.
2. coating according to claim 1, wherein the particle diameter of this polycarbonate-polyurethane is between 1nm to 100nm.
3. coating according to claim 1, wherein this high floating metal filler is leaf sheet metal, and its size is between 8 μm to 40 μm.
4. coating according to claim 1, wherein its floatability of this high floating metal filler in this coating is between 70% to 100%.
5. coating according to claim 1, wherein the electronegativity of this high floating metal filler is between 1.1 to 1.9, and this high floating metal filler comprises copper, aluminium, iron, nickel, manganese, zinc, above-mentioned mixture or above-mentioned alloy.
6. coating according to claim 1, wherein this water-based cakingagent comprises wetting agent, defoamer and/or flow agent further.
7. a formation method for coating, comprising:
Mix the water-based cakingagent of 50 weight part to 70 weight parts and the water of 100 weight part to 250 weight parts, form one first coating, wherein this water-based cakingagent comprises the line-type block polymer of a polycarbonate-polyurethane, its weight average molecular weight is between 50000 to 20000, and the mol ratio of polycarbonate and urethane is between 1:0.9 to 1:1.1;
Be uniformly mixed after the high floating metal filler of 30 weight part to 50 weight parts is added this first coating, form one second coating;
By this second coatings on a base material; And
Remove the water in this second coating, to form a coating.
8. the formation method of coating according to claim 7, in the step be uniformly mixed after wherein the high floating metal filler of 30 weight part to 50 weight parts being added this first coating, stir speed (S.S.) is between 200rpm to 300rpm.
9. the formation method of coating according to claim 7, dries in the shade at the step wherein removing the water in this second coating is included in 25 DEG C.
10. the formation method of coating according to claim 9, the step wherein removing the water in this second coating comprises an annealing process further, the temperature of this annealing process is between 90 DEG C to 110 DEG C, and the time of this annealing process is between 30 minutes to 2 hours.
The formation method of 11. coatings according to claim 7, wherein the infrared emitting rate of this coating is between 0.2 to 0.25.
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| WO2007077045A1 (en) * | 2006-01-03 | 2007-07-12 | Evonik Degussa Gmbh | Universal pigment preparations |
| CN101351517A (en) * | 2006-01-02 | 2009-01-21 | 阿克佐诺贝尔国际涂料股份有限公司 | Heat resistant coating |
| CN101765642A (en) * | 2007-07-31 | 2010-06-30 | 埃卡特有限公司 | Metallic paint, method for the production thereof, and use thereof |
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| CN101351517A (en) * | 2006-01-02 | 2009-01-21 | 阿克佐诺贝尔国际涂料股份有限公司 | Heat resistant coating |
| WO2007077045A1 (en) * | 2006-01-03 | 2007-07-12 | Evonik Degussa Gmbh | Universal pigment preparations |
| CN101765642A (en) * | 2007-07-31 | 2010-06-30 | 埃卡特有限公司 | Metallic paint, method for the production thereof, and use thereof |
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