CN103819998B - A kind of thermal insulation coat and painting method thereof and coating and preparation method - Google Patents
A kind of thermal insulation coat and painting method thereof and coating and preparation method Download PDFInfo
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- CN103819998B CN103819998B CN201210463939.2A CN201210463939A CN103819998B CN 103819998 B CN103819998 B CN 103819998B CN 201210463939 A CN201210463939 A CN 201210463939A CN 103819998 B CN103819998 B CN 103819998B
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Abstract
The invention discloses aluminium alloy extrusions and the aluminum alloy doors and windows of a kind of thermal insulation coat and painting method, coating and this thermal insulation coat of preparation method and application.Thermal insulation coat of the present invention, comprises the primer coating be directly coated on base material and the surface layer coating be coated in primer coating; The coating composition of described primer coating comprises: the investment precoat accounting for the 85%-94% of subbing gross weight, and accounts for the cenosphere of 6%-15% of subbing gross weight; The coating composition (weight portion) of described surface layer coating comprises: film forming agent 90-100; Curing agent 1-10; Nano material 0.5-10; Pulverulent filler 20-50; Levelling agent 0.5-2; Pigment or dyestuff 1-1.5; Other auxiliary agent 0.5-4.Application the present invention does not need to insert nonmetallic materials (bridge-cut-off aluminium alloy) in the middle of two conventional aluminium section bars, and common aluminum alloy door and window just can be made to have good heat insulation and preservation effect; Bridge-cut-off aluminium alloy is applied this coating, its heat insulation and preservation effect can be improved further.
Description
Technical field
The present invention relates to building material field, particularly the application of a kind of thermal insulation coat and painting method, coating and preparation method and this thermal insulation coat.
Background technology
At present, China's building energy consumption accounts for the 28-30% of national total energy consumption, and door and window energy consumption accounts for 50% of building energy consumption.Therefore, the key of building energy conservation is that door and window is energy-conservation.Adopt novel energy-conserving door and window, and carry out reducing energy consumption to existing building door and window, being the objective requirement of China's Energy situation, is also the inexorable trend of market development.
Building doors and windows market common are aluminum alloy doors and windows, plastic door-window, steel casement door window, Wood-door window and other class door and window.There is due to aluminum alloy doors and windows the features such as performance is good, lightweight, attractive in appearance, daylighting is good, durable in use, section bar easy recovery and reuse rate is high, non-environmental-pollution and be subject to liking of people.
But aluminum alloy doors and windows are compared with plastic door-window, there is a fatal weakness just poor on heat insulation.Aluminium alloy extrusions has good thermal conductivity, and heat insulation and preservation effect is poor.Therefore, heat insulation and heat-insulating property is improved in the emphasis of aluminum alloy doors and windows technical development and direction exactly.
Heat insulation and the heat-insulating property of current raising aluminum alloy doors and windows mainly adopts bridge cut-off (disconnected heat) aluminium alloy extrusions.It is 0.3W/m that bridge-cut-off aluminium alloy inserts heat transfer coefficient exactly in two common aluminiums
2.K nonmetallic materials, make the heat transfer coefficient of aluminium section bar greatly reduce.
But use the door and window of bridge-cut-off aluminium alloy to there are three large problems: one is that aluminium alloy door's window profile sectional area strengthens, add the consumption (weight ratio of bridge-cut-off aluminium alloy and non-bridge-cut-off aluminium alloy is 10.5 ︰ 6.5) of aluminium alloy, increase the production cost of door and window; Two is the nonmetallic materials used in the middle of two aluminiums, great majority are plastics, and the time is grown aging, affects door and window intensity and security; Three is reclaim for a long time in year, and plastics can secondary pollution environment.
Summary of the invention
In view of this, the object of the present invention is to provide the application of a kind of thermal insulation coat and painting method, coating and preparation method and this thermal insulation coat, make common aluminum alloy section bar and the aluminum alloy doors and windows of applying this thermal insulation coat, do not need to insert nonmetallic materials in the middle of two aluminiums, just can have good heat insulation and preservation effect.Bridge-cut-off aluminium alloy is applied this coating, its heat insulation and preservation effect can be improved further.
For achieving the above object, the present invention provide firstly a kind of thermal insulation coat, comprises the primer coating be directly coated on base material and the surface layer coating be coated in primer coating;
The coating composition of described primer coating comprises: the investment precoat accounting for the 85%-94% of subbing gross weight, and accounts for the cenosphere of 6%-15% of subbing gross weight;
The coating composition (weight portion) of described surface layer coating comprises: film forming agent 90-100; Curing agent 1-10; Nano material 0.5-10; Pulverulent filler 20-50; Levelling agent 0.5-2; Pigment or dyestuff 1-1.5; Other auxiliary agent 0.5-4;
Other described auxiliary agent comprises: one or more in light stabilizer, delustering agent, coupling agent, plasticizer, edges cover agent, defoamer, anticaking agent.
Preferably, described primer coating comprises bottom coating, the first layer of compensation and the second layer of compensation; Described bottom coating is formed by the subbing be directly coated on base material; Described first layer of compensation is coated in described bottom coating, described first layer of compensation be individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer; Described second layer of compensation is coated on described first layer of compensation, and described second layer of compensation is identical with the coating composition of primer coating; Described surface layer coating is coated on described second layer of compensation.
Preferably, described primer coating comprises bottom coating, and multilayer replaces the first layer of compensation and second layer of compensation of coating; Described bottom coating is formed by the subbing be directly coated on base material; Described first layer of compensation is coated on described bottom coating and the second layer of compensation, described first layer of compensation be individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer; Described second layer of compensation is coated on the first layer of compensation, and described second layer of compensation is identical with the coating composition of primer coating; Described surface layer coating is coated on described outermost second layer of compensation.
Preferably, described first layer of compensation preferably applies 2 layers, and the second layer of compensation preferably applies 2 layers.
Preferably, in the coating of described surface layer: described film forming agent comprises: one or more in epoxy resin, mylar, acrylic resin, amino resins, phenolic resins or alkyd resins.
Described curing agent comprises: one or more in dicyandiamide class, imidazoles, two hydrazides classes, polybasic carboxylic acid class, beta-hydroxy alkylamide class or isocyanurate curing dose of triglycidyl group.
Described pulverulent filler comprises one or more in barium sulfate, zirconia, mica powder, precipitated calcium carbonate, ceramic powder, diatomite, perlite, talcum powder.Described nano material comprises: one or more in nano zine oxide, nano silicon, nano titanium oxide, nano barium sulfate, nano yttrium oxide, nano zircite.
Described levelling agent comprises: one or more in polyacrylate, acrylate containing silicone, polyvinyl butyral resin, styrax, rilanit special, acetylbutyrylcellulose, epoxidized soybean oil.
Described pigment or dyestuff comprise: one or more in iron oxide red, iron oxide blue, iron oxide yellow, phthalocyanine blue, phthalocyanine green, lemon chrome, deep chrome yellow, chrome yellow, molybdate red, carbon black.
Preferably, the cenosphere in the coating of described bottom comprises: hollow ceramic microspheres or hollow glass micropearl; The serviceability rate of described cenosphere is 80% ~ 100%.
The coating composition of described primer coating preferably includes: the coating accounting for the surface layer of the 90%-92% of the coating gross weight of bottom, and accounts for the cenosphere of 8%-10% of coating gross weight of bottom.
Preferably, the primer coating thickness average out to 150-300 micron of described thermal insulation coat; Preferred average thickness is 200-250 micron; The surface layer coating layer thickness average out to 30-120 micron of described thermal insulation coat; Preferred average thickness is 50-80 micron.
Present invention also offers a kind of painting method of thermal insulation coat, comprise step:
A, by the spray painting of bottom on base material, carry out first time solidification;
Base material cooling after B, solidification, obtains primer coating;
C, by primer coating cool after, by the spray painting of surface layer on base material, then carry out second time solidify;
Base material cooling after D, solidification, obtains surface layer coating;
Described first time solidification is identical with the condition that second time is solidified, and comprising: solidification temperature 160-200 DEG C; Hardening time 10-25 minute.
Preferably, described steps A comprises: A1: be painted on by subbing on base material; A2, to coat on the base material of subbing described, then spray individual layer, serviceability rate be 80% ~ 100% pure cenosphere; A3, to coat on the base material of cenosphere described, then spray one deck subbing; A4, by spraying after base material carry out first time solidify; In described step B, after the base material cooling after solidification, form the primer coating comprising bottom coating, one deck first layer of compensation and one deck second layer of compensation.
Preferably, described steps A comprises: A1: be painted on by subbing on base material; A2, coat on the base material of subbing described, repeatedly alternating spray individual layer, serviceability rate be 80% ~ 100% pure cenosphere and subbing; A3, by spraying after base material carry out first time solidify; In described step B, after the base material cooling after solidification, formed and comprise bottom coating, and alternately the first layer of compensation of coating and the primer coating of the second layer of compensation.
Present invention also offers the coating of primer coating in a kind of thermal insulation coat, its component is identical with the coating composition of foregoing primer coating.
Present invention also offers a kind of preparation method of coating of described primer coating, comprise step:
A, by after film forming agent fragmentation, to mix with other auxiliary agent of curing agent, nano material, pulverulent filler, levelling agent, pigment or dye well;
B, by after mixing for mixed raw material extruder, discharging, be cooled to room temperature, compressing tablet;
C, the raw material after compressing tablet is sent into crushing and screening unit, broken, classification is sieved, grinding particle size 170-190 order, obtains the powder of the coating applying surface layer;
D, cenosphere to be added in the powder of coating of described coating surface layer, fully mix, obtain the coating applying bottom.
Preferably, film forming agent is smashed by described step a, and broken rotating speed is 1440r/min, and film forming agent particle size after cracking is 40-60 order; Mixed by various raw material components in high-speed mixer, mixer speed of agitator is 55-65r/min, and incorporation time is 5-15 minute; Described step b extruder feeding section temperature is 70-120 DEG C, and discharging section temperature is 110-140 DEG C.In described step c, the preferred 180-220 order of grinding particle size.
Preferably, before in the powder of coating cenosphere being added described coating surface layer, comprise further: joined by cenosphere in a certain amount of ethanol, the volume ratio of cenosphere and ethanol is 1:2, fully stirs, stratification; Get the microballon dried for standby on upper strata.
Present invention also offers a kind of common aluminum alloy section bar, it is coated with foregoing thermal insulation coat.
Present invention also offers a kind of common aluminum alloy door and window, it is by above-mentioned aluminium alloy extrusions manufacture.
Present invention provides a kind of bridge-cut-off aluminium alloy, it is also coated with foregoing thermal insulation coat.
Present invention also offers a kind of broken-bridge aluminum alloy door and window, it is by above-mentioned bridge-cut-off aluminium alloy manufacture.
The application aluminum window of thermal insulation coat of the present invention and the heat-insulating property of several conventional building doors and windows are carried out contrast test, and test result refers to table 1:
From table 1, apply common aluminum alloy window of the present invention, heat preservation and insulation can reach the identical effect of broken-bridge aluminum alloy window.That is, application the present invention does not need to insert nonmetallic materials in the middle of two aluminiums, and common aluminum alloy door and window just can be made to have good heat insulation and preservation effect.Further, bridge-cut-off aluminium alloy is applied this coating, its heat insulation and preservation effect can be improved further.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 a-Fig. 1 c is three kinds of thermal insulation coat schematic cross-sections in the embodiment of the present invention;
Fig. 2 a is under ESEM, the display figure of commercially available cenosphere;
Fig. 2 b is under ESEM, through the display figure of pretreated cenosphere;
Fig. 3 a is under ESEM, and prior art is containing the display figure of cenosphere coating;
Fig. 3 b is under ESEM, and the present invention is containing the subbing display figure of cenosphere;
Fig. 4 a is the aluminum alloy surface microgram only applying subbing of the present invention;
Fig. 4 b is the aluminum alloy surface microgram of coating subbing of the present invention and investment precoat.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Aluminum current alloy door and window, by adopting double glazing, low-reflection glass, popularization bridge insulation thermal resistance section bar, improving the methods such as sealing joint strip quality, reduces the heat transfer coefficient of door and window.The present invention tries every possible means in common aluminum alloy Surface of profile coating, by applying the coating of double-deck heat-insulation and heat-preservation, reduces the heat transfer coefficient of door and window.The heat transfer coefficient k value applying the common aluminum alloy window of thermal insulation coat of the present invention can be reduced to 2.5-2.9W/m
2.K ,≤2.9W/m is namely wanted
2.K (the LOW-E double glazing of 5+12A+5 joined by common aluminum alloy section bar).This aluminum window, existing heat insulation and preservation effect, the decoration function of not lost system again, higher than bridge cut-off section bar aluminum alloy doors and windows intensity, security good and the trouble and worry such as non-environmental-pollution, aluminium section bar 38% can be saved, unit cost declines 20%, and have good cost performance, the popularization for building energy conservation door and window opens a new wide path.
In addition, the heat transfer coefficient k value applying the broken-bridge aluminum alloy window of thermal insulation coat of the present invention can be reduced to 2.0-2.4W/m
2.K.Visible with reference to CNS, apply common aluminum alloy window and the broken-bridge aluminum alloy window of thermal insulation coat of the present invention, its heat transfer coefficient all can reduce a rank.
See Fig. 1 a, thermal insulation coat of the present invention have employed the structure of duplex coating, comprises the primer coating be directly coated on base material and the surface layer coating be coated in primer coating; Wherein, the coating composition of primer coating comprises: the investment precoat accounting for the 85%-94% of subbing gross weight, and accounts for the cenosphere of 6%-15% of subbing gross weight; The coating composition (weight portion) of surface layer coating comprises: film forming agent 90-100; Curing agent 1-10; Nano material 0.5-10; Pulverulent filler 20-50; Levelling agent 0.5-2; Pigment or dyestuff 1-1.5; Other auxiliary agent 0.5-4; Other described auxiliary agent comprises: one or more in light stabilizer, delustering agent, coupling agent, plasticizer, edges cover agent, defoamer, anticaking agent.
In the present invention, in order to guarantee to contain enough cenospheres in coating further, when embody rule, when priming operation coating, one or more layers layer of compensation can also be applied between bottom coating and surface layer coating, as a part for bottom.
Concrete, see Fig. 1 b, first subbing directly can be coated on base material, as bottom coating, and then apply one deck individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer, as the first layer of compensation, the first layer of compensation sprays one deck subbing again, as the second layer of compensation, finally surface layer coating is coated on described second layer of compensation.Define and comprise 2 layers of subbing, the bottom of 1 layer of cenosphere layer and the coating of one deck surface layer.
Also can first subbing be directly coated on base material, as bottom coating.Then, multilayer replaces coating first layer of compensation and the second layer of compensation, and wherein, the first layer of compensation is coated on described bottom coating and the second layer of compensation, for individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer; Described second layer of compensation is coated on the first layer of compensation, and described second layer of compensation is identical with the coating composition of primer coating.Finally, surface layer coating is coated on described outermost second layer of compensation.Fig. 1 c shows the situation applying one deck bottom coating, two-layer first layer of compensation, two-layer second layer of compensation and one deck surface layer coating on base material; In practical application, the mode of preferred Fig. 1 b or Fig. 1 c.
In the coating of the surface layer of thermal insulation coat of the present invention:
Described film forming agent includes but not limited to: one or more in epoxy resin, mylar, acrylic resin, amino resins, phenolic resins or alkyd resins.
Described curing agent but be not limited to: one or more in dicyandiamide class, imidazoles, two hydrazides classes, polybasic carboxylic acid class, beta-hydroxy alkylamide class or isocyanurate curing dose of triglycidyl group.
Described pulverulent filler includes but not limited to one or more in barium sulfate, zirconia, mica powder, precipitated calcium carbonate, ceramic powder, diatomite, perlite, talcum powder.
Described nano material includes but not limited to: one or more in nano zine oxide, nano silicon, nano titanium oxide, nano barium sulfate, nano yttrium oxide, nano zircite.
Described levelling agent includes but not limited to: one or more in polyacrylate, acrylate containing silicone, polyvinyl butyral resin, styrax, rilanit special, acetylbutyrylcellulose, epoxidized soybean oil.
Described pigment or dyestuff include but not limited to: one or more in iron oxide red, iron oxide blue, iron oxide yellow, phthalocyanine blue, phthalocyanine green, lemon chrome, deep chrome yellow, chrome yellow, molybdate red, carbon black.
Cenosphere in the coating of bottom described in the present invention, and can comprise as the cenosphere of the first layer of compensation: hollow ceramic microspheres or hollow glass micropearl; The serviceability rate of described cenosphere is 80% ~ 100%.
This cenosphere can be obtained by pretreatment, and concrete grammar is: joined by commercially available cenosphere in a certain amount of ethanol, and the volume ratio of cenosphere and ethanol is 1:2, fully stirs, stratification, gets the microballon dried for standby on upper strata.As shown in Figure 2 a, commercially available cenosphere breakage rate is very high, and as shown in Figure 2 b, its serviceability rate is close to 100% for the cenosphere like this after process.
In thermal insulation coat of the present invention, the coating composition of described primer coating preferably includes: the coating accounting for the surface layer of the 90%-92% of the coating gross weight of bottom, and accounts for the cenosphere of 8%-10% of coating gross weight of bottom.
The primer coating thickness average out to 150-300 micron of thermal insulation coat of the present invention; Preferred average thickness is 200-250 micron; The surface layer coating layer thickness average out to 30-120 micron of described thermal insulation coat; Preferred average thickness is 50-80 micron.
Invention also provides the painting method of above-mentioned thermal insulation coat, comprise step: A, by the spray painting of bottom on section bar, carry out first time solidification; Section bar after B, solidification cools under being placed in room temperature naturally, obtains primer coating; C, by primer coating cool after, by the spray painting of surface layer on section bar, then carry out second time solidify; Section bar after D, solidification cools under being placed in room temperature naturally, obtains surface layer coating; Described first time solidification is identical with the condition that second time is solidified, and comprising: solidification temperature 160-200 DEG C; Hardening time 10-25 minute.
In painting method of the present invention, can in described steps A the spray painting of the bottom to section bar after, before first time solidification, spraying one deck first layer of compensation or alternating spray first layer of compensation and the second layer of compensation further; Described first layer of compensation be individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer; Described second layer of compensation is sprayed on the first layer of compensation, and described second layer of compensation is identical with the coating composition of primer coating.
In painting method of the present invention, the thickness of described first layer of compensation and the second layer of compensation without particular limitation of, as long as the gross thickness of primer coating is 150 – 300 microns, the gross thickness of preferred primer coating is 200 – 250 microns.
Present invention also offers the coating of primer coating in a kind of thermal insulation coat, its component comprises: the investment precoat accounting for the 85%-94% of subbing gross weight, and accounts for the cenosphere of 6%-15% of subbing gross weight; The coating composition (weight portion) of surface layer coating comprises: film forming agent 90-100; Curing agent 1-10; Nano material 0.5-10; Pulverulent filler 20-50; Levelling agent 0.5-2; Pigment or dyestuff 1-1.5; Other auxiliary agent 0.5-4; Other described auxiliary agent comprises: one or more in light stabilizer, delustering agent, coupling agent, plasticizer, edges cover agent, defoamer, anticaking agent.The instantiation of its various component as hereinbefore, no longer repeat specification here.
Invention also provides the preparation method of the coating of above-mentioned primer coating, comprise step: a, by after film forming agent fragmentation, to mix with other auxiliary agent of curing agent, nano material, pulverulent filler, levelling agent, pigment or dye well; B, mixed raw material carried out use extruder mixing after, discharging, be cooled to room temperature, compressing tablet; C, the raw material after compressing tablet is sent into crushing and screening unit, broken, classification is sieved, grinding particle size 170-190 order, obtains the powder of the coating applying surface layer; D, cenosphere to be added in the powder of coating of described coating surface layer, fully mix, obtain the coating applying bottom.
Wherein, film forming agent is smashed by described step a, and broken rotating speed is 1440r/min-1450r/min, and object is that film forming agent is broken for granularity 40-60 order; Mix in high-speed mixer, mixer speed of agitator is 55-65r/min, and object is that various raw material components premixed is even, and incorporation time is 5-15 minute; Step b extruder feeding section temperature is 70-120 DEG C, and discharging section temperature is 110-140 DEG C.In step c, the preferred 180-220 order of grinding particle size.
The present invention's disintegrating machine, mixer and extruder used all need not specifically limit, those skilled in the art rule of thumb can select to be suitable for any disintegrating machine of the object of the invention, mixer and extruder, such as, mixer can be the PHJ series vertical and high-speed mixer, PHJ series horizontal high-speed mixer etc. of Yantai Ling Yu; Extruder can be the SLJ double screw extruder, three and the SHT-50 extrusion machinery group etc. of Thailand of Yantai Ling Yu.
In an embodiment of the present invention, can in the powder of coating cenosphere being added described coating surface layer before, comprise further: joined by cenosphere in a certain amount of ethanol, the volume ratio of cenosphere and ethanol is 1:2, abundant stirring, stratification; Get the microballon dried for standby on upper strata.Described stirring can be carried out with being suitable for any agitator of the present invention, the hinging type mixer of described agitator such as Yancheng Hai Lian, tiltedly leaf paddle stirrer etc.
Present invention also offers the aluminium alloy extrusions being coated with above-mentioned thermal insulation coat in addition, and the aluminum alloy doors and windows that the aluminium alloy extrusions described in adopting manufactures.
When the present invention specifically implements, can carry out according to the following procedure:
(1) prepare coating, comprising:
1, prepare the coating of surface layer coating: after film forming agent fragmentation, mix with other auxiliary agent of curing agent, nano material, pulverulent filler, levelling agent, pigment or dye well; B, mixed raw material carried out use extruder mixing after, discharging, be cooled to room temperature, compressing tablet; C, the raw material after compressing tablet is fed into crushing and screening unit, broken, classification is sieved, grinding particle size 180-200 order, obtains the powder of the coating applying surface layer.
2, carry out pretreatment to cenosphere: joined by commercially available cenosphere in a certain amount of ethanol, the volume ratio of cenosphere and ethanol is 1:2, fully stirs, stratification, gets the microballon dried for standby on upper strata.
3, pretreated cenosphere is added in the coating of surface layer coating, obtain the coating of primer coating.
(2) by the spray painting of the coating of primer coating and surface layer coating on aluminium alloy extrusions, form two layers of coatings structure:
During concrete enforcement, electrostatic powder coating technique can be adopted.Before dusting, first pretreatment is carried out to aluminium alloy extrusions, comprise the operations such as degreasing, alkali cleaning, bright dipping, anodic oxidation.Then section bar is put into the cabinet that dusts, the spray painting of the primer coating prepared by preceding method with spray gun on section bar, then carries out first time solidification in the thermostatic drying chamber being placed with air blast.Solidification temperature controls at 160-200 DEG C, time 10-25 minute, and film average thickness is between 150-300 micron, and the average thickness of optimization, between 200-250 micron, naturally cools under being finally placed in room temperature, obtains primer coating.In the present invention, after first time solidification, the time of cooling can be unrestricted, as long as can cool to room temperature.
In the coating procedure of bottom, different coating processes and condition of work may cause the content of coating hollow core microballon filler not reach requirement.In this case, can before first time solidification, bottom coating sprays the pure cenosphere layer of one deck, or adopt the way of alternately coating, the i.e. coating of the pure cenosphere layer of alternating spray and primer coating, guarantee containing enough cenospheres in coating, to ensure the heat insulation and preservation effect of film.
Cooled for primer coating section bar is put into the cabinet that dusts, with spray gun by the spray painting of surface layer coating on section bar, carry out second time solidification in the thermostatic drying chamber being again placed with air blast.Solidification temperature controls at 160-200 DEG C, time 10-25 minute, and film average thickness is between 30-120 micron, and the average thickness of optimization, between 50-80 micron, naturally cools under being finally positioned over room temperature, obtains surface layer coating.In the present invention, after second time solidification, the time of cooling can be unrestricted, as long as can cool to room temperature.
(3) production of the aluminum alloy doors and windows of thermal insulation coat of the present invention is applied:
The production of aluminum alloy doors and windows routinely technique is carried out, and its technological process is as follows:
---die-cut------assembling---assembling---packaging is put in storage to bore milling in cutting.
Specific embodiment is as follows:
Embodiment 1: common (non-bridge cut-off) aluminium alloy extrusions/door and window applying thermal insulation coat of the present invention
(1) prepare coating, comprising:
1, the coating of surface layer is prepared by following component and weight portion: epoxy resin 100; Curing agent 4.70; Levelling agent 1.52; Nano titanium oxide 0.64; Zirconia 5.12; Mica powder 12; Chrome yellow 5.22; Iron oxide red 3.48; Carbon black 0.70; Other auxiliary agent 0.50.
First film forming agent epoxy resin is crushed to 40 orders in the present embodiment, broken rotating speed is 1440r/min, and then it added in high-speed mixer with other components and mix, the rotating speed of mixer is 60r/min.Mix after 10 minutes, then it is mixing to enter double screw extruder.Extruder feeding section temperature is 80 DEG C, and discharging section temperature is 115 DEG C.Discharging, be cooled to room temperature, compressing tablet.Enter crushing and screening unit again, broken, classification is sieved, and more than grinding particle size 180 order 100% passes through, and obtains the coating powder that the present embodiment applies for surface layer.
2, pretreatment is carried out to hollow ceramic microspheres: by commercially available hollow ceramic microspheres by volume 1:2 (hollow ceramic microspheres: ethanol) add in ethanol, fully stir, stratification, get the microballon dried for standby on upper strata.This step can complete before preparing investment precoat, also can complete after preparing surface layer coating.Following examples are identical.
3, pretreated hollow ceramic microspheres is added in the coating of surface layer, obtain the coating of primer coating.
Under ESEM, as shown in Figure 3 b, itself and prior art contain the coating of cenosphere to the coating of the bottom of the present embodiment, and as shown in Figure 3 a, the serviceability rate of cenosphere substantially increases.
By pretreated hollow ceramic microspheres according to gross weight 8% weight ratio add aforesaid for surface layer coating coating powder (92% of gross weight) in, fully mix, obtain the coating that the present invention applies for bottom.
(2) by the spray painting of the coating of primer coating and surface layer coating on aluminium alloy extrusions, form the test piece of two layers of coatings structure:
(1) selection of test piece and surface treatment
By GB/T1727, by aluminium sheet after oil removing, chemical oxidation, carry out chromaking PROCESS FOR TREATMENT.
(2) paint film preparation
Being placed on by the model handled well dusts in cabinet, with spray gun, subbing is sprayed to the surface of model, and the model sprayed is kept vertical, is placed with in the thermostatic drying chamber of air blast and carries out first time solidification.Solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 250 microns.
After model cooling, then put back to by model and dust in cabinet, with spray gun by the surface of the spray painting of surface layer to model, in thermostatic drying chamber, carry out second time solidify, solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 50 microns.After second time solidification, cooling is stand-by.
Find in test, the aluminium alloy extrusions outward appearance only applying subbing is more coarse, and as coating layer thickness skewness under figure microcosmic, as shown in fig. 4 a, this just causes effect of heat insulation undesirable.Further test finds, if first spray the subbing that one deck is prepared according to aforesaid composition and engineering on aluminum alloy doors and windows, be heating and curing, form bottom, spray one deck after cooling more not containing the investment precoat of cenosphere, and be heating and curing, smooth surface layer can be formed, as shown in Figure 4 b, such double-decker can significantly improve the effect of heat insulation of coating.
After spraying, the Rotating fields of aluminium alloy extrusions as shown in Figure 1a.
(3) production of the aluminum alloy doors and windows of the thermal insulation coat of embodiment is applied:
The production of aluminum alloy doors and windows routinely technique is carried out, and its technological process is as follows:
---die-cut------assembling---assembling---packaging is put in storage to bore milling in cutting.
(4) performance test:
Sample by GB3186 regulation, measure the performance such as paint film appearance, hardness, adhesive force, bend test, resistance to impact, salt fog resistance test of sample.The window that the aluminium section bar made of said method and LOW-E glass are assembled into, door and window energy saving 2.8W/m after testing
2.K.
Embodiment 2: the aluminium alloy extrusions/door and window applying thermal insulation coat of the present invention (non-bridge cut-off)
(1) prepare coating, comprising:
1, the coating of surface layer is prepared by following component and weight portion: acrylic resin 100; Curing agent 4.50; Levelling agent 3.96; Styrax 0.52; Nano barium sulfate 3.68; Mica powder 13; Other auxiliary agent 3.40.
First film forming agent acrylate is crushed to 60 orders in the present embodiment, broken rotating speed is 1450r/min, then adds in high-speed mixer by itself and other component, mixer rotating speed 65r/min, mix after 15 minutes, then it is mixing to enter double screw extruder.Extruder feeding section temperature is 110 DEG C, and discharging section temperature is 125 DEG C, discharging, is cooled to room temperature, compressing tablet.Enter crushing and screening unit again, broken, classification is sieved, and more than grinding particle size 180 order 100% passes through, and obtains the coating powder that the present embodiment applies for surface layer.
2, pretreatment is carried out to hollow glass micropearl: by commercially available hollow glass micropearl by volume 1:2 (cenosphere: ethanol) add in ethanol, fully stir, stratification, get the microballon dried for standby on upper strata.
3, pretreated hollow glass micropearl is added in the coating of surface layer coating, obtain the coating of primer coating.
By pretreated hollow glass micropearl according to gross weight 8% weight ratio add aforesaid for surface layer coating coating powder (92% of gross weight) in, fully mix, obtain the coating that the present embodiment applies for bottom.
(2) by the spray painting of the coating of primer coating and surface layer coating on aluminium alloy extrusions, form the test piece of two layers of coatings structure:
(1) selection of test piece and surface treatment
By GB/T1727, by aluminium sheet after oil removing, chemical oxidation, carry out chromaking PROCESS FOR TREATMENT.
(2) paint film preparation
Being placed on by the model handled well dusts in cabinet, with spray gun, subbing is sprayed to the surface of model, and the model sprayed is kept vertical, is placed with in the thermostatic drying chamber of air blast and carries out first time solidification.Solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 250 microns.
After model cooling, then put back to by model and dust in cabinet, with spray gun, investment precoat is sprayed to the surface of model, in thermostatic drying chamber, carry out second time solidify, solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 50 microns.After second time solidification, cooling is stand-by naturally.In the present embodiment, all at room temperature naturally cool after twice solidification, following examples are identical.
After spraying, the Rotating fields of aluminium alloy extrusions as shown in Figure 1a.
(3) production of the aluminum alloy doors and windows of the thermal insulation coat of embodiment is applied:
The production of aluminum alloy doors and windows routinely technique is carried out, and its technological process is as follows:
---die-cut------assembling---assembling---packaging is put in storage to bore milling in cutting.
(4) performance test:
Sample by GB3186 regulation, measure the performance such as paint film appearance, hardness, adhesive force, bend test, resistance to impact, salt fog resistance test of sample.The window that the aluminium section bar made of said method and LOW-E glass are assembled into, door and window energy saving 2.7W/m after testing
2.K.
Embodiment 3: the aluminium alloy extrusions/door and window applying thermal insulation coat of the present invention (non-bridge cut-off)
(1) prepare coating, comprising:
1, the coating of surface layer is prepared by following component and weight portion: epoxy resin 100; Curing agent 4.70; Levelling agent 1.52; Nano zine oxide 3.12; Nano titanium oxide 0.64; Zirconia 5.12; Mica powder 12; Chrome yellow 5.22; Iron oxide red 3.48; Carbon black 0.70; Other auxiliary agent 0.50.
First film forming agent epoxy resin is crushed to 40 orders in the present embodiment, broken rotating speed is 1440r/min, and then it added in high-speed mixer with other components and mix, mixer rotating speed is 60r/min, and after mixing 10min, then it is mixing to enter double screw extruder.Extruder feeding section temperature is 85 DEG C, and discharging section temperature is 115 DEG C, discharging, is cooled to room temperature, compressing tablet.Enter crushing and screening unit again, broken, classification is sieved, and more than grinding particle size 180 order 100% passes through, and obtains the coating powder of the present embodiment for top coat.
2, pretreatment is carried out to hollow glass micropearl: by commercially available cenosphere by volume 1:2 (cenosphere: ethanol) add in ethanol, fully stir, stratification, get the microballon dried for standby on upper strata.
3, pretreated hollow glass micropearl is added in the coating of surface layer coating, obtain the coating of primer coating.
By pretreated hollow glass micropearl according to gross weight 10% weight ratio add aforesaid for surface layer coating coating powder (90% of gross weight) in, fully mix, obtain the coating that the present embodiment applies for bottom.
(2) by the spray painting of the coating of primer coating and surface layer coating on aluminium alloy extrusions, form the test piece of two layers of coatings structure:
(1) selection of test piece and surface treatment
By GB/T1727, by aluminium sheet after oil removing, chemical oxidation, carry out chromaking PROCESS FOR TREATMENT.
(2) paint film preparation
Being placed on by the model handled well dusts in cabinet, with spray gun, bottom is obtained the surface of spray painting to model, coating layer thickness controls at about 50 microns, face sprays the pure hollow glass micropearl layer (adopting pretreated hollow glass micropearl) of one deck about 30 microns more on the coating layer, then the coating of the bottom of one deck about 50 microns is sprayed again, alternating spray obtains the bottom of the sandwich construction of 3 layers of subbing+2 layers of hollow glass micropearl, the model sprayed is kept vertical, is placed with in the thermostatic drying chamber of air blast and carries out first time solidification.Solidification temperature controls at 180 DEG C, 10 minutes time, and coating thickness is about 250 microns.
After model cooling, then put back to by model and dust in cabinet, with spray gun, surface layer is obtained the surface of spray painting to model, in thermostatic drying chamber, carry out second time solidify, solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 50 microns.After solidification, cooling is stand-by.
After spraying, the Rotating fields of aluminium alloy extrusions as illustrated in figure 1 c.
(3) production of the aluminum alloy doors and windows of the thermal insulation coat of embodiment is applied:
The production of aluminum alloy doors and windows routinely technique is carried out, and its technological process is as follows:
---die-cut------assembling---assembling---packaging is put in storage to bore milling in cutting.
(4) performance test:
Sample by GB3186 regulation, measure the performance such as paint film appearance, hardness, adhesive force, bend test, resistance to impact, salt fog resistance test of sample.The window that the aluminium section bar made of said method and LOW-E glass are assembled into, door and window energy saving 2.6W/m after testing
2.K.
Embodiment 4: the bridge-cut-off aluminium alloy/door and window applying thermal insulation coat of the present invention
(1) prepare coating, comprising:
1, the coating of surface layer is prepared by following component and weight portion: epoxy resin 100; Curing agent 4.70; Levelling agent 1.52; Nano zine oxide 3.12; Nano titanium oxide 0.64; Zirconia 5.12; Mica powder 12; Chrome yellow 5.22; Iron oxide red 3.48; Carbon black 0.70; Other auxiliary agent 0.50.
First film forming agent epoxy resin is crushed to 40 orders in the present embodiment, broken rotating speed is 1440r/min, and then it added in high-speed mixer with other components and mix, mixer rotating speed is 60r/min, mix after 10 minutes, then it is mixing to enter double screw extruder.Extruder feeding section temperature is 70 DEG C, and discharging section temperature is 110 DEG C, discharging, is cooled to room temperature, compressing tablet.Enter crushing and screening unit again, broken, classification is sieved, and more than grinding particle size 180 order 100% passes through, and obtains the coating powder that the present embodiment applies for surface layer.
2, pretreatment is carried out to hollow glass micropearl: by commercially available hollow glass micropearl by volume 1:2 (cenosphere: ethanol) add in ethanol, fully stir, stratification, get the microballon dried for standby on upper strata.
3, pretreated hollow glass micropearl is added in the coating of surface layer coating, obtain the coating of primer coating.
By pretreated hollow glass micropearl according to gross weight 10% weight ratio add aforesaid for surface layer coating coating powder (90% of gross weight) in, fully mix, obtain the coating that the present embodiment applies for bottom.
(2) by the spray painting of the coating of primer coating and surface layer coating on bridge-cut-off aluminium alloy, form the test piece of two layers of coatings structure:
(1) selection of test piece and surface treatment
By GB/T1727, by aluminium sheet after oil removing, chemical oxidation, carry out chromaking PROCESS FOR TREATMENT.
(2) paint film preparation
Being placed on by the model handled well dusts in cabinet, with spray gun, subbing is sprayed to the surface of model, coating layer thickness controls about 100 microns, face sprays pure hollow glass micropearl (through the pretreated hollow glass micropearl) layer of one deck about 50 microns more on the coating layer, then the subbing of one deck about 100 microns is sprayed again, alternating spray obtains the sandwich construction bottom of 2 layers of subbing+1 layer of hollow glass micropearl, the model sprayed is kept vertical, is placed with in the thermostatic drying chamber of air blast and carries out first time solidification.Solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 250 microns.
After model cooling, then put back to by model and dust in cabinet, with spray gun, investment precoat is sprayed to the surface of model, in thermostatic drying chamber, carry out second time solidify, solidification temperature controls at 180 DEG C, and 10 minutes time, coating thickness is about 50 microns.After solidification, cooling is stand-by.
After spraying, the Rotating fields of aluminium alloy extrusions as shown in Figure 1 b.
(3) production of the broken-bridge aluminum alloy door and window of the thermal insulation coat of embodiment is applied:
The production of broken-bridge aluminum alloy door and window routinely technique is carried out, and its technological process is as follows:
---die-cut------assembling---assembling---packaging is put in storage to bore milling in cutting.
(4) performance test:
Sample by GB3186 regulation, measure the performance such as paint film appearance, hardness, adhesive force, bend test, resistance to impact, salt fog resistance test of sample.The window that the bridge-cut aluminum section bar made of said method and LOW-E glass are assembled into, door and window energy saving 2.0W/m after testing
2.K.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (19)
1. a thermal insulation coat, is characterized in that: comprise the primer coating be directly coated on base material and the surface layer coating be coated in primer coating; Described primer coating comprises bottom coating, the first layer of compensation and the second layer of compensation;
Described bottom coating is formed by the subbing be directly coated on base material;
Described first layer of compensation is coated in described bottom coating, described first layer of compensation be individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer;
Described second layer of compensation is coated on described first layer of compensation, and described second layer of compensation is identical with the coating composition of described subbing;
Described surface layer coating is coated on described second layer of compensation;
Wherein, the investment precoat component of described surface layer coating comprises with weight portion: film forming agent 90-100; Curing agent 1-10; Nano material 0.5-10; Pulverulent filler 20-50; Levelling agent 0.5-2; Pigment or dyestuff 1-1.5; Other auxiliary agent 0.5-4;
The component of described subbing comprises: the described investment precoat accounting for the 85%-94% of subbing gross weight, and accounts for the cenosphere of 6%-15% of subbing gross weight;
Other described auxiliary agent comprises: one or more in light stabilizer, delustering agent, coupling agent, plasticizer, edges cover agent, defoamer, anticaking agent.
2. thermal insulation coat according to claim 1, is characterized in that, in described investment precoat:
Described film forming agent comprises: one or more in epoxy resin, mylar, acrylic resin, amino resins, phenolic resins or alkyd resins;
Described curing agent comprises: one or more in dicyandiamide class, imidazoles, two hydrazides classes, polybasic carboxylic acid class, beta-hydroxy alkylamide class or isocyanurate curing dose of triglycidyl group;
Described pulverulent filler comprises one or more in barium sulfate, zirconia, mica powder, precipitated calcium carbonate, ceramic powder, diatomite, perlite, talcum powder;
Described nano material comprises: one or more in nano zine oxide, nano silicon, nano titanium oxide, nano barium sulfate, nano yttrium oxide, nano zircite;
Described levelling agent comprises: one or more in polyacrylate, acrylate containing silicone, polyvinyl butyral resin, styrax, rilanit special, acetylbutyrylcellulose, epoxidized soybean oil;
Described pigment or dyestuff comprise: one or more in iron oxide red, iron oxide blue, iron oxide yellow, phthalocyanine blue, phthalocyanine green, lemon chrome, deep chrome yellow, chrome yellow, molybdate red, carbon black.
3. thermal insulation coat according to claim 1, is characterized in that: the cenosphere in described subbing comprises: hollow ceramic microspheres or hollow glass micropearl;
The serviceability rate of described cenosphere is 80% ~ 100%.
4. the thermal insulation coat according to any one of claim 1-3, is characterized in that: described subbing component comprises: the investment precoat accounting for the 90%-92% of subbing gross weight, and accounts for the cenosphere of 8%-10% of subbing gross weight.
5. the thermal insulation coat according to any one of claim 1-3, is characterized in that: the primer coating thickness average out to 150-300 micron of described thermal insulation coat; The surface layer coating layer thickness average out to 30-120 micron of described thermal insulation coat.
6. thermal insulation coat according to claim 5, is characterized in that: the primer coating thickness average out to 200-250 micron of described thermal insulation coat; The surface layer coating layer thickness average out to 50-80 micron of described thermal insulation coat.
7. a thermal insulation coat, is characterized in that: comprise the primer coating be directly coated on base material and the surface layer coating be coated in primer coating; Described primer coating comprises bottom coating, and multilayer replaces the first layer of compensation and second layer of compensation of coating;
Described bottom coating is formed by the subbing be directly coated on base material;
Described first layer of compensation is coated on described bottom coating and the second layer of compensation, described first layer of compensation be individual layer, serviceability rate be 80% ~ 100% pure cenosphere layer;
Described second layer of compensation is coated on the first layer of compensation, and described second layer of compensation is identical with the coating composition of described subbing;
Described surface layer coating is coated on described outermost second layer of compensation;
Wherein, the investment precoat component of described surface layer coating comprises with weight portion: film forming agent 90-100; Curing agent 1-10; Nano material 0.5-10; Pulverulent filler 20-50; Levelling agent 0.5-2; Pigment or dyestuff 1-1.5; Other auxiliary agent 0.5-4;
The component of described subbing comprises: the investment precoat accounting for the 85%-94% of subbing gross weight, and accounts for the cenosphere of 6%-15% of subbing gross weight;
Other described auxiliary agent comprises: one or more in light stabilizer, delustering agent, coupling agent, plasticizer, edges cover agent, defoamer, anticaking agent.
8. thermal insulation coat according to claim 7, is characterized in that: described first layer of compensation applies 2 layers, and the second layer of compensation applies 2 layers.
9. thermal insulation coat according to claim 7, is characterized in that, in described investment precoat:
Described film forming agent comprises: one or more in epoxy resin, mylar, acrylic resin, amino resins, phenolic resins or alkyd resins;
Described curing agent comprises: one or more in dicyandiamide class, imidazoles, two hydrazides classes, polybasic carboxylic acid class, beta-hydroxy alkylamide class or isocyanurate curing dose of triglycidyl group;
Described pulverulent filler comprises one or more in barium sulfate, zirconia, mica powder, precipitated calcium carbonate, ceramic powder, diatomite, perlite, talcum powder;
Described nano material comprises: one or more in nano zine oxide, nano silicon, nano titanium oxide, nano barium sulfate, nano yttrium oxide, nano zircite;
Described levelling agent comprises: one or more in polyacrylate, acrylate containing silicone, polyvinyl butyral resin, styrax, rilanit special, acetylbutyrylcellulose, epoxidized soybean oil;
Described pigment or dyestuff comprise: one or more in iron oxide red, iron oxide blue, iron oxide yellow, phthalocyanine blue, phthalocyanine green, lemon chrome, deep chrome yellow, chrome yellow, molybdate red, carbon black.
10. thermal insulation coat according to claim 7, is characterized in that: the cenosphere in described subbing comprises: hollow ceramic microspheres or hollow glass micropearl;
The serviceability rate of described cenosphere is 80% ~ 100%.
11. thermal insulation coats according to any one of claim 7-10, is characterized in that: described subbing component comprises: the investment precoat accounting for the 90%-92% of subbing gross weight, and account for the cenosphere of 8%-10% of subbing gross weight.
12. thermal insulation coats according to any one of claim 7-10, is characterized in that: the primer coating thickness average out to 150-300 micron of described thermal insulation coat; The surface layer coating layer thickness average out to 30-120 micron of described thermal insulation coat.
13. thermal insulation coats according to claim 12, is characterized in that: the primer coating thickness average out to 200-250 micron of described thermal insulation coat; The surface layer coating layer thickness average out to 50-80 micron of described thermal insulation coat.
The painting method of thermal insulation coat described in claim any one of 14. 1 kinds of claim 1-6, comprises step:
A, subbing is painted on base material; Coat on the base material of subbing described, then spray individual layer, serviceability rate be 80% ~ 100% pure cenosphere; Coat on the base material of cenosphere described, then spray one deck subbing; Base material after spraying is carried out first time solidification;
Base material cooling after B, solidification, obtains primer coating;
C, by primer coating cool after, investment precoat is sprayed on base material, then carry out second time solidify;
Base material cooling after D, solidification, obtains surface layer coating;
In described step B, after the base material cooling after solidification, form the primer coating comprising bottom coating, one deck first layer of compensation and one deck second layer of compensation;
Described first time solidification is identical with the condition that second time is solidified, and comprising: solidification temperature 160-200 DEG C; Hardening time 10-25 minute.
15. any one of claim 7-13 the painting method of thermal insulation coat described in claim, it is characterized in that: comprise step:
A, subbing is painted on base material; Coat on the base material of subbing described, repeatedly alternating spray individual layer, serviceability rate be 80% ~ 100% pure cenosphere and subbing; Base material after spraying is carried out first time solidification;
Base material cooling after B, solidification, obtains primer coating;
C, by primer coating cool after, investment precoat is sprayed on base material, then carry out second time solidify;
Base material cooling after D, solidification, obtains surface layer coating;
In described step B, after the base material cooling after solidification, formed and comprise bottom coating, and alternately the first layer of compensation of coating and the primer coating of the second layer of compensation;
Described first time solidification is identical with the condition that second time is solidified, and comprising: solidification temperature 160-200 DEG C; Hardening time 10-25 minute.
16. 1 kinds of common aluminum alloy section bars, is characterized in that: be coated with the thermal insulation coat described in any one of claim 1-13.
17. 1 kinds of common aluminum alloy door and windows, is characterized in that: adopt aluminium alloy extrusions manufacture according to claim 16.
18. 1 kinds of bridge-cut-off aluminium alloys, is characterized in that: be coated with the thermal insulation coat described in any one of claim 1-13.
19. 1 kinds of broken-bridge aluminum alloy door and windows, is characterized in that: adopt aluminium alloy extrusions manufacture according to claim 18.
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| CN201210463939.2A CN103819998B (en) | 2012-11-16 | 2012-11-16 | A kind of thermal insulation coat and painting method thereof and coating and preparation method |
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