A kind of high radiation heat insulation coating
Technical field
The present invention relates to a kind of thermal insulating coating, particularly relate to a kind of high radiation heat insulation coating.
Background technology
Building energy conservation occupies main positions in the whole nation is energy-conservation, the materials such as the polyphenyl class adopting at present, extrusion molding class are by mounting and the construction technology such as wrapping up buildings is carried out to heat-insulation and heat-preservation, although these materials also can play thermal insulation function, there is the shortcomings such as easy firing, contaminate environment, complicated construction technique, work-ing life be short in these materials.Therefore, in industry, start development architecture heat-reflecting insulating coating for outer surface, be coated on body surface and raise to reduce owing to shining upon the surface temperature causing, reach the object of thermo-optical reflective insulation energy conservation.
Application number is to disclose a kind of heat-reflecting insulating coating for outer surface of building and preparation method thereof in 201010044807.7 Chinese patent, comprises following composition: water-based soap-free polymerization copolymer emulsion, titanium dioxide, boron-containing glass microballon, ceramics powder, filler, wetting agent, dispersion agent, thickening material, defoamer, film coalescence aid, propylene glycol, water.The coating making is not containing heavy metal, nontoxic pollution-free, be a kind of environmental friend type multifunction energy-saving coatings, not only strengthened the reflecting properties of exterior wall to sunlight heat, reduced exterior wall to the thermal-radiating absorption of sunlight, thereby reduced the table temperature of buildings, reached the effect of heat-insulating and energy-saving.
Application number is to disclose a kind of waterborne reflective heat-insulating building coating in 201210565165.4 Chinese patent, by the raw material of parts by weight once, made: ACRYLIC EMULSION 40-60 part, titanium dioxide 5-15 part, cenosphere 2-6 part, ceramics powder 3-7 part, dispersion agent 1-5 part, defoamer 3-6 part, sanitas 1-4 part, thickening material 3-8 part, film coalescence aid 6-10 part, frostproofer 3-9 part.This invention has weathering resistance, temperature-change resistance, contamination resistance, is a kind of energy-conserving and environment-protective, long service life, waterborne reflective heat-insulating building coating that sun emittance is high.
Application number is to disclose a kind of thermal insulating coating that reflects solar heat ray in 200710035834.6 Chinese patent, it consists of bottom-coating and painting coating two portions, in described bottom-coating, solids quality per-cent is: hollow beads lagging material 5-40%, heat-reflecting material 10-50%, tackiness agent macromolecule resin 10-70%; In painting coating, solids quality per-cent is: the coated reverberation ray matrix material 5-40% in surface, heat-reflecting material 10-50%, tackiness agent macromolecule resin 10-70%, during dry coating film thickness 0.3-0.5mm, to the specular reflectance included of invisible heat, 85-90% can be reached, sun heat radiation can be effectively prevented.
Application number is to disclose a kind of reflective heat-insulation paint for building in 201210420412.1 Chinese patent, in weight part, comprise following component: 9.5~23 parts, water, 0.44~1.08 part of thickening material, 0.45~0.55 part of dispersion agent, 0.1~0.2 part of wetting agent, 0.4~0.8 part of defoamer, 0.05~0.25 part of multifunctional assistant, 0.05~0.15 part of sanitas, 0.05~0.25 part of mould inhibitor, 15~25 parts of titanium dioxides, 0~22.5 part, nano heat-insulating powder slurry, 2~6.5 parts of fillers, 1~2 part of frostproofer, 1.25~2 parts of film coalescence aid, 0.01~0.02 part of emulsifying agent, 25~40 parts of emulsions, 2.5~5 parts of hydrophobizing agents, 0.05~0.15 part of pH value conditioning agent, 0.02~0.07 part of tributyl phosphate.There is good hydrophobicity the coating film forming rear surface of this invention, has hydrophobic waterproof self-cleaning function, and can improve the heat-proof quality of filming.
Yet the heat-reflecting insulating coating of mentioning in above-mentioned patent is all used cenosphere as lagging material, carry out directly single mixing with filler, pigment, auxiliary agent etc.The top layer that always floats on coated material system during because of the coated heat-reflecting material in its surface therefore needs to make its blending dispersion even by strong stirring in preparation process.And cenosphere wall is thin, in strong stirring process, cenosphere cracky causes the heat-proof quality of coating to reduce; Cenosphere dispersion effect in water is poor on the other hand, and the coating layer of formation is inhomogeneous, the reflection efficiency of impact to invisible heat.Meanwhile, reverberation efficiency and the heat-insulating capability of existing heat-reflecting insulating coating are in urgent need to be improved.Therefore, explore the high radiation heat insulation coating that a kind of effect of heat insulation that integrates obstruct, reflection and three kinds of heat insulation modes of radiation reaches more than 98% and become a study hotspot now.
Summary of the invention
The present invention is intended to overcome the deficiency of existing heat-reflecting insulating coating technology of preparing, and a kind of high radiation heat insulation coating is provided.This kind high thinking that radiation heat insulation coating had both adopted traditional external wall outer insulation " to block up ", extraneous heat is saved in thermal insulation layer every the outside in building basic unit, adopt again the design concept of " dredging ", by instant the reflecting away of the energy of sunlight, and the heat of building accumulation is discharged in infrared mode in good time, guarantee the effect of heat insulation that it is high.
For the problems referred to above, the invention provides a kind of high radiation heat insulation coating technology scheme:
A high radiation heat insulation coating, is characterized in that comprising each components of following parts by weight: cenosphere 12-20 part of aluminizing in infrared reflecting paint 25-37 part, surface, aerogel 15-28 part, organic resin 30-55 part, other auxiliary agents 2.55-5.47 part.
Described infrared reflecting paint is metal oxide titanium dioxide, one or more in manganese oxide, nickel oxide, ferric oxide, chromium sesquioxide, cobalt oxide and nitrate, acetate mixes by 1000 ℃ of above high-temperature calcinations, metal ion and oxonium ion in raw material rearrange, and form more stable spinel structure or rutile-type structure; Again due to the specific surface area of rectangle pigment particles with spherical compare much bigger, and scattering of light degree is directly proportional to scattering area, so the photothermal reflectance rate of rectangle titanium dioxide is higher, therefore first-selected pigment particles is shaped as rectangular Rutile type Titanium Dioxide, and its particle diameter is 200-500nm.
The cenosphere of aluminizing in described surface adopts the methods such as chemical vapour deposition, vacuum sputtering, ion plating at cenosphere coated with uniform one deck aluminium foil, and the thickness of aluminium foil is 0.05-3 μ m, and coating layer is that one deck is to multilayer; Meanwhile, form the nearly vacuum body group of the spherical hollow bead particles composition of a coat-thickness after the solid film forming of coating in coating, volume accounts for the more than 50% of whole coat-thickness, forms together thermal resistance barrier effectively.
Described aerogel is SiO
2one or more in aerogel, organic aerogel and carbon aerogels, aerogel is a kind of lightweight nano-porous materials with spacial framework that is cross-linked with each other and is formed by colloidal particle or high-polymer molecular, porosity is up to 80%~99.8%, typical case's pore dimension is less than 50nm, network colloidal solid size 3~20nm, thereby effectively limited solid state heat conduction and gaseous state thermal conduction, make it there is at normal temperatures extremely low thermal conductivity; The thermal radiation of aerogel is the infrared emanation occurring in 3-5 μ m region, its thermal radiation thermal conductivity is along with temperature raises and increases sharply, mix after infrared reflecting paint, greatly reduce the thermal conduction being caused by infrared emanation, its thermal conductivity under room temperature normal pressure reaches respectively 0.018W/mK and 0.012W/mK, under vacuum condition, can lowly reach 0.004W/mK, become the strong heat shield of high radiation heat insulation coating.
Described organic resin is acrylic resin, organosilicon modified crylic acid resin, Synolac, silicone alkyd, fluorine resin, epoxy resin, chlorinated rubber etc., can be applied in the present invention with solution or emulsion state.
Other described auxiliary agents comprise the component of following parts by weight: wetting agent 0.1-0.2 part, dispersion agent 0.36-0.47 part, defoamer 0.3-0.9 part, sanitas 0.02-0.1 part, mould inhibitor 0.02-0.1 part, thickening material 0.52-1.12 part, film coalescence aid 1.2-2.4 part, pH value conditioning agent 0.03-0.18 part.
Described high radiation heat insulation coating dry coating film thickness is 0.3-1mm.
Major advantage of the present invention is: 1. the aluminium foil reflectance of cenosphere outer cladding is high, can be used for intercepting high temperature heat radiation, and multilayer aluminum face has been realized the secondary reflection again after coating surface infrared reflecting paint, has greatly improved photothermal reflectance effect; 2. aluminium foil, simultaneously as the protective layer of cenosphere, guarantees its unlikely damage under strong stirring; 3. adding of aerogel effect of heat insulation is greatly improved on original cenosphere basis, the high radiation heat insulation coating heat-proof quality of preparation is good.4. safety and environmental protection, nonpoisonous and tasteless, to environment and personnel without injury; 5. good weathering resistance, water tolerance, contamination resistance, abrasion resistance etc.; 6. stable performance, not stratified, there is excellent mechanical property, good sticking power; 7. applied widely, applicable to reducing the surface temperature of buildings metal roof, exterior wall and its surface being shielded; The burning sensation of minimizing pipeline, valve, low-temperature (low temperature) vessel and loss of refrigeration capacity etc.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims to the modification of the various equivalent form of values of the present invention and limit.
Embodiment 1
A high radiation heat insulation coating, comprises each component of following mass fraction:
12 parts of the cenospheres, the SiO that aluminize in 25 parts of Rutile type Titanium Dioxides, surface
215 parts of aerogels, 50 parts of acrylic resins, 0.1 part of wetting agent, 0.36 part of dispersion agent, 0.3 part of defoamer, 0.02 part of sanitas, 0.02 part of mould inhibitor, 0.7 part of thickening material, 1.2 parts of film coalescence aid, 0.09 part of pH value conditioning agent.
Embodiment 2
A high radiation heat insulation coating, comprises each component of following mass fraction:
1.8 parts of 0.6 part of 0.03 part of 0.03 part of 0.35 part of 0.4 part of 0.15 part of 42 parts of 23 parts of 18 parts of cenospheres, carbon aerogels, silicone alkyds, wetting agent, dispersion agent, defoamer, sanitas, mould inhibitor, thickening material, the film coalescence aid of aluminizing in 30 parts of Rutile type Titanium Dioxides, surface, 0.1 part of pH value conditioning agent.
Above are only two embodiments of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading the scope of protection of the invention.In every case be the content that does not depart from technical solution of the present invention, any type of simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.