CN103881504B - A kind of colored selfreparing heat-reflective coating and coating process thereof - Google Patents
A kind of colored selfreparing heat-reflective coating and coating process thereof Download PDFInfo
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Abstract
A kind of colored selfreparing heat-reflective coating and coating process thereof, belong to heat-reflective coating technical field.Be made up of coating priming paint, coatings and colored heat-reflective coating three part, containing selfreparing capsule in wherein selfreparing layer.The colored selfreparing heat-reflective coating invented, compared to the coating of same color, has higher solar heat reflection efficiency, can effectively reduce the energy consumption of building in summer; Containing the microcapsule with self-repair function in coating, when coating cracks damages, microcapsule break, and inner liquid substance flows out, and makes coating crack up, realizes the selfreparing of heat-reflective coating, thus extend the work-ing life of heat reflection coatings.
Description
Technical field
The invention belongs to heat-reflective coating field, particularly colored selfreparing heat-reflective coating of one and preparation method thereof.
Background technology
Heat reflection coatings has comparatively high reverse--bias efficiency to sunlight, can effectively reduce the energy consumption for cooling of summer air-conditioning, as a kind of novel energy-saving building materials, constantly applies.At present, heat reflection coatings also exists two large problems in applying, and one is that the heat reflection coatings applied at present is mostly white or light, builds and is difficult to meet to the requirement of the colorful property of coating; Two be heat reflection coatings relative to common coating, high cost, its application is restricted.Therefore, develop colored heat reflection coatings, the work-ing life of improving heat reflection coatings seems particularly important.
Summary of the invention
For Problems existing in current heat reflection coatings application process, the invention provides a kind of can realization and review one's lessons by oneself coloured coating and the application using method thereof that redoubling has high infrared reflection effect.By preparing and using the microcapsule with self-repair function, improve the work-ing life of coating, the use of color infrared reflective paint then improves the heat reflection efficiency relative to equal color coating.Selfreparing heat-reflective coating of the present invention, reflection efficiency is high, long service life, and coating process is simple and meet the demand of coating to color.
Colored selfreparing heat-reflective coating of the present invention is formed primarily of priming paint, middle coatings and surface color heat-reflective coating.The moiety of coatings comprises filming emulsion, has the microcapsule of self-repair function, film coalescence aid and dispersion agent.The moiety of colored heat-reflective coating comprises filming emulsion, infrared reflecting paint, titanium dioxide, glass microballon, water, film coalescence aid, defoamer, dispersion agent etc.
The technical solution adopted in the present invention is:
Above-mentioned coatings component is as follows according to mass percent:
Filming emulsion: 40% ~ 65%
Self-repairing microcapsule: 30% ~ 50%
Film coalescence aid: 2% ~ 10%
Dispersion agent: 0.1% ~ 5%.
The capsule-core quality composition of above-mentioned self-repairing microcapsule: emulsifying agent 0.35-0.5wt%, epoxy resin and fluorocarbon resin mixture 31 ~ 45.2wt%, the mass ratio of epoxy resin and fluorocarbon resin is 1 ~ 1.5:1, regulates capsule-core viscosity between 2000 ~ 3000mPas; Cyst wall is: urea and 37% the urea-formaldehyde resin prepared in the ratio that the ratio of amount of substance is 0.17 ~ 0.5:1 of formaldehyde solution, cyst wall starting material and core materials mass ratio are 0.75 ~ 1.5:1; Microcapsules Size is 0.4 ~ 0.7mm, preferred 0.5mm.
The component of above-mentioned colored heat-reflective coating is as follows according to mass percent:
Filming emulsion: 40% ~ 60%
Infrared reflecting paint: 0% ~ 20%
Titanium dioxide: 5% ~ 20%
Glass microballon: 0% ~ 20%
Film coalescence aid: 2% ~ 10%
Defoamer: 0.1% ~ 3%
Dispersion agent: 0.1% ~ 3%
Water: 10%-20%.
The application step of selfreparing heat-reflective coating is:
(1) priming is coated with, natural air drying at the bottom of base material;
(2) coatings is brushed uniformly on priming paint, as the middle level of coating, natural air drying;
(3) colored heat reflection coatings is brushed on coatings uniformly as finish paint.
In designed heat-reflective coating, play selfreparing containing the microcapsule with self-repair function at middle coating intermediate, the investment precoat containing high infrared reflection pigment meets the requirement to heat reflection and color.
Described filming emulsion is water-based pure acrylic latex, water-base fluorocarbon emulsion, organosilicon-acrylic resin emulsion or the epoxy resin aqueous solution.
Described infrared reflecting paint is one or more in ferric oxide, chromic oxide, titanium oxide, aluminum oxide, zinc oxide.
The preparation method of selfreparing microcapsule, adopt in-situ polymerization two-step approach to prepare uramit resin-coated epoxy resin and fluorocarbon resin microcapsule, major control stirring velocity and each component account for system percentage composition, specifically comprise the following steps:
(1) preparation of urea resin prepolymer: be first (0.17-0.5) by the formaldehyde solution of urea and 37wt% in the ratio of amount of substance: the ratio of 1 mixes, after urea all dissolves, with trolamine regulator solution pH=8.5 ~ 9.5, heated solution to 70 DEG C reaction 1h, prepare the urea resin prepolymer of clear viscous, reconcile system pH=7 with dilute hydrochloric acid after cooling stand-by;
(2) capsule-core is prepared: deionized water and emulsifying agent are mixed, then a certain amount of epoxy resin and fluorocarbon resin is added wherein, oil-in-water emulsifiers stably dispersing is treated in stirring, each constituent mass per-cent accounts for whole capsule-core system respectively: emulsifying agent 0.35-0.5wt%, epoxy resin and fluorocarbon resin mixture 31-45.2wt%, surplus is deionized water, abundant stirring 0.5h, obtains oil-in-water type emulsion system, for subsequent use;
Wherein, the mass ratio of epoxy resin and fluorocarbon resin is 1-1.5:1, and adjusting viscosity is between 2000 ~ 3000mPas.
Described emulsifying agent is Sodium dodecylbenzene sulfonate, adds the aqueous solution form of fashionable employing 0.5-1.0g/l.
(3) core materials of preparation in the urea resin prepolymer of preparation in step (1) and step (2) is (0.75-1.5) by (3) in mass ratio: the ratio mixing of 1, add Resorcinol and ammonium chloride, wherein the add-on of Resorcinol and ammonium chloride is respectively with the mass ratio of deionized water is (10-15): 3, it is 3.5-4.0 that hydrochloric acid is adjusted to pH, 2 ~ 3h is reacted in the thermostat water bath of 60-70 DEG C, after question response terminates, by the liquid filtering in flask, washing, dry microcapsule.
Stirring velocity 300-600r/min is controlled, to obtain particle size range at the microcapsule of 300 μm-400 μm in step (2) and (3).Particle diameter too small microcapsule capsule-core content is less, can not reach and capsule-core be flowed out and then reparation coating surface because crackle produces; And the oversize of microcapsule can not be mixed to form coating with coating, therefore under the condition of this invention, stirring velocity should control at 300-600r/min.
Selfreparing heat-reflective coating of the present invention is made up of coating priming paint, coatings and colored heat-reflective coating three part.The colored selfreparing heat-reflective coating invented, compared to the coating of same color, has higher solar heat reflection efficiency, can effectively reduce the energy consumption of building in summer; Containing the microcapsule with self-repair function in coating, when coating cracks damages, microcapsule break, and inner liquid substance flows out, and makes coating crack up, realizes the selfreparing of heat-reflective coating, thus extend the work-ing life of heat reflection coatings.
Compared with prior art, unique distinction of the present invention is, selects the microcapsule with self-repair function, improves the resistance to cleavage of heat reflection coatings, extends the work-ing life of heat reflection coatings; Employing itself had both had the coloured pigment compared with high infrared reflection performance, avoided the impact of other colored pigments on coating properties of infrared reflection.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but the present invention is not limited to following examples.The preparation technology with the microcapsule of self-repair function is:
1, the preparation of microcapsule a:
(1) by urea with 37% formaldehyde solution be that 0.25:1 fully mixes and stirs according to the ratio of amount of substance, after treating that urea dissolves, with trolamine regulator solution pH=8.5, react at 70 DEG C, obtain the urea resin prepolymer of clear viscous after 1h, reconcile system pH=7 with dilute hydrochloric acid after cooling stand-by.
(2) respectively to adding deionized water, Sodium dodecylbenzene sulfonate, epoxy resin, fluorocarbon resin in four-hole boiling flask, low whipping speed is stir 0.5h under 300r/min to obtain oil-in-water emulsion.Emulsifier aqueous solution is according to concentration according to 0.75g/L proportioning, and epoxy resin and fluorocarbon resin are 1:1 proportioning according to mass ratio.It is 32% that epoxy resin and fluorocarbon resin mixture account for whole system quality per-cent.
(3) performed polymer obtained in (1) is mixed with the emulsion in (2), stir, add Resorcinol and ammonium chloride, be that 10:3 adds according to the mass ratio with deionized water, now add salt acid for adjusting pH to 3.5, in the water-bath of 60 DEG C, isothermal reaction 3h, makes capsule solidify.After question response is complete, filters, wash, be drying to obtain microcapsule a.
2, the preparation of microcapsule b:
(1) by urea with 37% formaldehyde solution be that 0.17:1 fully mixes and stirs according to the ratio of amount of substance, start mechanical stirring device, after treating that urea dissolves, with trolamine regulator solution pH=9, react at 70 DEG C, obtain the urea resin prepolymer of clear viscous after 1h, reconcile system pH=7 with dilute hydrochloric acid after cooling stand-by.
(2) respectively to adding deionized water, Sodium dodecylbenzene sulfonate, epoxy resin, fluorocarbon resin in four-hole boiling flask, low whipping speed is stir 0.5h under 300r/min to obtain oil-in-water emulsion.Emulsifier aqueous solution is according to concentration according to 0.85g/L proportioning, and epoxy resin and fluorocarbon resin are 1.2:1 proportioning according to mass ratio.It is 37% that epoxy resin and fluorocarbon resin mixture account for whole system quality per-cent.
(3) performed polymer obtained in (1) is mixed with the emulsion in (2), stir, add Resorcinol and ammonium chloride, be that 12:3 adds according to the mass ratio with deionized water, now add hydrochloric acid and regulate PH to 3.5, in the water-bath of 60 DEG C, isothermal reaction 3h, makes capsule solidify.After question response is complete, filters, wash, be drying to obtain microcapsule b.
3, the preparation of microcapsule c:
(1) by urea with 37% formaldehyde solution be that 0.19:1 fully mixes and stirs according to the ratio of amount of substance, start mechanical stirring device, after treating that urea dissolves, with trolamine regulator solution pH=9.5, react at 70 DEG C, obtain the urea resin prepolymer of clear viscous after 1h, reconcile system pH=7 with dilute hydrochloric acid after cooling stand-by.
(2) respectively to adding deionized water, Sodium dodecylbenzene sulfonate, epoxy resin, fluorocarbon resin in four-hole boiling flask, low whipping speed is stir 0.5h under 300r/min to obtain oil-in-water emulsion.Emulsifier aqueous solution is according to concentration according to 0.90g/L proportioning, and epoxy resin and fluorocarbon resin are 1.5:1 proportioning according to mass ratio.It is 40% that epoxy resin and fluorocarbon resin mixture account for whole system quality per-cent.
(3) performed polymer obtained in (1) is mixed with the emulsion in (2), stir, add Resorcinol and ammonium chloride, be that 15:3 adds according to the mass ratio with deionized water, now add hydrochloric acid and regulate PH to 3.5, in the water-bath of 60 DEG C, isothermal reaction 3h, makes capsule solidify.After question response is complete, filters, wash, be drying to obtain microcapsule c.
Embodiment 1
Selfreparing heat-reflective coating in the present embodiment, its priming paint adopts acrylic primer.Select microcapsule a, its mass percentage is 30%, and pure acrylic latex is 65%, film coalescence aid 4.5%, and dispersant B YK-1100.5% synthesizes self-healing coatings, as the middle level of coating.As the heat reflection coatings of surface layer, its composition mainly comprises, pure acrylic latex 50%wt%, high reverse--bias ferric oxide red colorant 10wt%, titanium dioxide 10wt%, glass microballon 10wt%, distilled water 15wt%, film coalescence aid 3wt%, defoamer BYK-0521wt%, dispersant B YK-1101wt%.High reverse--bias ferric oxide red colorant, its composition is mainly Fe
2o
3, and a certain amount of Cr that adulterates
2o
3and TiO
2obtain etc. compound.
Its coating process is first be coated with priming at the bottom of base material, and natural air drying 1h, brushes on priming paint at twice uniformly by coatings, and interval time is 1h, as the middle level of coating; Finally using red heat reflection coatings as finish paint brushing twice, interval 1h, natural air drying.
Embodiment 2
Green selfreparing heat-reflective coating in the present embodiment, its priming paint adopts fluorocarbon resin priming paint.Select microcapsule b, its mass percentage is 35%, water-base fluorocarbon emulsion 60%, film coalescence aid 2.5%, and dispersion agent 2.5% synthesizes self-healing coatings, as the middle level of coating.As the heat reflection coatings of surface layer, its composition mainly comprises, water-base fluorocarbon emulsion 50%wt%, combined oxidation chrome green pigment 10wt%, titanium dioxide 10wt%, glass microballon 10wt%, distilled water 15%, film coalescence aid 3wt%, defoamer BYK-0521wt%, dispersant B YK-1101wt%.High IR thermooxidizing chrome green pigment, its composition is mainly Cr
2o
3, and a certain amount of Al that adulterates
2o
3and TiO
2obtain etc. compound.
Its coating process is first be coated with priming, natural air drying 1h at the bottom of base material; Brushed uniformly on priming paint at twice by coatings, twice brushing interval 1.5h, as the middle level of coating; Finally using green heat reflection coatings as finish paint brushing twice, interval 1h, natural air drying.
Embodiment 3
Yellow selfreparing heat-reflective coating in the present embodiment, its priming paint adopts acid-organosilicon crylic acid priming paint.Select microcapsule c, its mass percentage is 40%, and organosilicon-acrylic resin emulsion is 55%, film coalescence aid 3.5%, and dispersion agent 1.5% synthesizes self-healing coatings, as the middle level of coating.As the heat reflection coatings of surface layer, its composition mainly comprises, organosilicon-acrylic resin emulsion 50%wt%, titanium chrome yellow 15wt%, titanium dioxide 5wt%, glass microballon 10wt%, distilled water 15%, film coalescence aid 3wt%, defoamer BYK-0521wt%, dispersant B YK-1101wt%.Its infrared external reflection yellow pigment is titanium chrome yellow, and its composition is mainly TiO
2, Cr
2o
3and Al
2o
3etc. being composited.
Coating process is first be coated with priming, natural air drying 1h at the bottom of base material; Then coatings is brushed uniformly on priming paint, as the middle level of coating, natural air drying 2h; Finally yellow heat reflection coatings is evenly brushed twice as finish paint, interval 1h, natural air drying.
Embodiment 4
White selfreparing heat-reflective coating in the present embodiment, its priming paint adopts epoxy resin primer.Select its mass percentage of microcapsule c to be 50%, epoxy resin latex is 45%, film coalescence aid 4.5%, and dispersion agent 0.5% synthesizes self-healing coatings, as the middle level of coating.As the heat reflection coatings of surface layer, its composition comprises, epoxy resin latex 50%wt%, titanium dioxide 20wt%, glass microballon 10wt%, distilled water 15%, film coalescence aid 3wt%, defoamer BYK-0521wt%, dispersant B YK-1101wt%.
Coating process is first be coated with priming, natural air drying 1h at the bottom of base material; Then coatings is brushed uniformly the middle level as coating on priming paint, natural air drying 2h; Finally white hot reflective coating is evenly brushed twice as finish paint, interval 1h, natural air drying.
Test example: embodiment 1 ~ 4 selfreparing heat reflection coatings is brushed the surface of aluminum plate at 10cm × 8cm on request, is solidified into thickness, test its sun reflectivity as in the table below.
Its sun reflectivity of table 1 film surface
| Project | Sun reflectivity |
| Embodiment 1 | 0.6323 |
| Embodiment 2 | 0.6125 |
| Embodiment 3 | 0.6162 |
| Embodiment 4 | 0.8993 |
When coating produces tiny crack, near crackle, microcapsule destroy, and capsule-core flows out can reparation automatically, extend coating work-ing life, repairing effect the best when tiny crack width is at 200-300um.
Claims (5)
1. a colored selfreparing heat-reflective coating, it is characterized in that, form primarily of priming paint, middle coatings and surface color heat-reflective coating, the moiety of coatings comprises filming emulsion, has the microcapsule of self-repair function, film coalescence aid and dispersion agent; The moiety of colored heat-reflective coating comprises filming emulsion, infrared reflecting paint, titanium dioxide, glass microballon, distilled water, film coalescence aid, defoamer, dispersion agent;
Above-mentioned coatings component is as follows according to mass percent:
Filming emulsion: 40% ~ 65%
Self-repairing microcapsule: 30% ~ 50%
Film coalescence aid: 2% ~ 10%
Dispersion agent: 0.1% ~ 5%;
The capsule-core quality composition of above-mentioned self-repairing microcapsule: emulsifying agent 0.35-0.5wt%, epoxy resin and fluorocarbon resin mixture 31 ~ 45.2wt%, the mass ratio of epoxy resin and fluorocarbon resin is 1 ~ 1.5:1, regulates capsule-core viscosity between 2000 ~ 3000mPas; Cyst wall is: the urea-formaldehyde resin that the formaldehyde solution of urea and 37wt% is prepared in the ratio that the ratio of amount of substance is 0.17 ~ 0.5:1, and cyst wall starting material and core materials mass ratio are 0.75 ~ 1.5:1; Microcapsules Size is 300 μm-400 μm;
The component of above-mentioned colored heat-reflective coating is as follows according to mass percent:
Filming emulsion: 40% ~ 60%
Infrared reflecting paint: 0% ~ 20%
Titanium dioxide: 5% ~ 20%
Glass microballon: 0% ~ 20%
Film coalescence aid: 2% ~ 10%
Defoamer: 0.1% ~ 3%
Dispersion agent: 0.1% ~ 3%
Distilled water: 10%-20%;
Described infrared reflecting paint is one or more in ferric oxide, chromic oxide, titanium oxide, aluminum oxide, zinc oxide.
2., according to the colored selfreparing heat-reflective coating of the one of claim 1, it is characterized in that, described filming emulsion is water-based pure acrylic latex, water-base fluorocarbon emulsion, organosilicon-acrylic resin emulsion or the epoxy resin aqueous solution.
3. the colored selfreparing heat-reflective coating of the one of claim 1, it is characterized in that, the preparation method of selfreparing microcapsule, in-situ polymerization two-step approach is adopted to prepare uramit resin-coated epoxy resin and fluorocarbon resin microcapsule, major control stirring velocity and each component account for system percentage composition, specifically comprise the following steps:
(1) preparation of urea resin prepolymer: be first (0.17-0.5) by the formaldehyde solution of urea and 37wt% in the ratio of amount of substance: the ratio of 1 mixes, after urea all dissolves, with trolamine regulator solution pH=8.5 ~ 9.5, heated solution to 70 DEG C reaction 1h, prepare the urea resin prepolymer of clear viscous, stand-by with dilute hydrochloric acid regulation system pH=7 after cooling;
(2) capsule-core is prepared: deionized water and emulsifying agent are mixed, then a certain amount of epoxy resin and fluorocarbon resin is added wherein, oil-in-water emulsifiers stably dispersing is treated in stirring, each constituent mass per-cent accounts for whole capsule-core system respectively: emulsifying agent 0.35-0.5wt%, epoxy resin and fluorocarbon resin mixture 31-45.2wt%, surplus is deionized water, abundant stirring 0.5h, obtains oil-in-water type emulsion system, for subsequent use;
Wherein, the mass ratio of epoxy resin and fluorocarbon resin is 1-1.5:1, and adjusting viscosity is between 2000 ~ 3000mPas;
Described emulsifying agent is Sodium dodecylbenzene sulfonate, adds the aqueous solution form of fashionable employing 0.5-1.0g/L; (3) be (0.75-1.5) in mass ratio by the core materials of preparation in the urea resin prepolymer of preparation in step (1) and step (2): the ratio of 1 mixes, add Resorcinol and ammonium chloride, be (10-15) according to the mass ratio with deionized water: 3 add, it is 3.5-4.0 that hydrochloric acid is adjusted to pH, 2 ~ 3h is reacted in the thermostat water bath of 60-70 DEG C, after question response terminates, by the liquid filtering in flask, washing, dry microcapsule;
Stirring velocity 300-600r/min is controlled, to obtain particle size range at the microcapsule of 300 μm-400 μm in step (2) and (3).
4. prepare the method for a kind of colored selfreparing heat-reflective coating of claim 1, it is characterized in that, comprise the following steps:
(1) priming is coated with, natural air drying at the bottom of base material;
(2) coatings is brushed uniformly on priming paint, as the middle level of coating, natural air drying;
(3) colored heat reflection coatings is brushed on coatings uniformly as surface layer.
5. according to the method for claim 4, it is characterized in that, priming paint, coatings and colored heat-reflective coating all brush 1 ~ 2 time.
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| CN105755800B (en) * | 2014-12-18 | 2017-12-26 | 太原市誉远涂料有限公司 | A kind of heat-reflective coating cloth |
| CN105199517A (en) * | 2015-11-04 | 2015-12-30 | 济南思拓新源医药科技有限公司 | Coating and preparation method thereof |
| KR20190018034A (en) * | 2016-07-21 | 2019-02-20 | 오토노믹 머터리얼즈, 아이엔씨. | Peel resistance for porous substrates Self-healing coatings and colorants |
| CN106928764B (en) * | 2017-05-05 | 2019-07-19 | 志合山海（北京）科技有限公司 | A kind of aqueous marine anticorrosion paint and preparation method thereof with self-healing properties |
| CN107476520A (en) * | 2017-08-07 | 2017-12-15 | 万卓（江苏）新材料有限公司 | A kind of orienting reflex light porcelain tendre ornament materials and preparation method thereof |
| CN108003688A (en) * | 2017-12-25 | 2018-05-08 | 王文婧 | A kind of preparation method of selfreparing anti-corrosion primer |
| CN110241452B (en) * | 2019-07-16 | 2020-05-12 | 嘉兴学院 | Magnesium alloy micro-arc oxidation electrolyte, preparation method thereof and magnesium alloy surface treatment method |
| CN112778857A (en) * | 2020-12-30 | 2021-05-11 | 山东富海材料科技有限公司 | Color coating layer steel plate with self-repairing function and preparation method thereof |
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