CN101696336A - Novel environment-friendly heat insulating coating and preparation method thereof - Google Patents

Novel environment-friendly heat insulating coating and preparation method thereof Download PDF

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Publication number
CN101696336A
CN101696336A CN200910197647A CN200910197647A CN101696336A CN 101696336 A CN101696336 A CN 101696336A CN 200910197647 A CN200910197647 A CN 200910197647A CN 200910197647 A CN200910197647 A CN 200910197647A CN 101696336 A CN101696336 A CN 101696336A
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China
Prior art keywords
insulating coating
heat insulating
novel environment
friendly heat
expanded vermiculite
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Pending
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CN200910197647A
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Chinese (zh)
Inventor
杜红波
毛志平
张琳萍
徐红
诸佩菊
单苗苗
黄杨
刘洪磊
鄢田婷
王天靖
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Donghua University
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Donghua University
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Priority to CN200910197647A priority Critical patent/CN101696336A/en
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Abstract

The invention relates to a novel environment-friendly heat insulating coating and a preparation method thereof. The novel environment-friendly heat insulating coating comprises the following components in percentage by weight: 10 to 50 percent of film forming matter, 1 to 3 percent of expanded vermiculite, 5 to 25 percent of meerschaum, 1 to 20 percent of hollow microspheres, 0.5 to 5 percent of wetting agent, 0.5 to 5 percent of dispersing agent, 0.5 to 5 percent of defoaming agent, 0.5 to 5 percent of silane coupling agent, 1 to 10 percent of auxiliary agents, and 10 to 50 percent of solvent. The preparation method comprises the following steps of: grinding, vacuum filtrating, drying, grinding, screening and drying the expanded vermiculite, and then evenly mixing the dried expanded vermiculite with the dried meerschaum and the hollow microspheres to form a component A; mixing the film forming matter, the solvent, the wetting agent, the dispersing agent, the defoaming agent, the silane coupling agent and other auxiliary agents to obtain a component B; and evenly mixing the components A and B, and defoaming the mixture to obtain the heat insulating coating of the invention. The prepared insulating coating is coated on the surface of a working surface, is cured at the normal temperature and completely dried to achieve the effects of heat preservation and heat insulation.

Description

A kind of novel environment-friendly heat insulating coating and preparation method thereof
Technical field
The invention belongs to the heat-insulation and heat-preservation field of material preparation, particularly relate to a kind of novel environment-friendly heat insulating coating and preparation method thereof.
Background technology
Existing insulating mold coating based on silicate materials such as asbestos, aluminum silicate fiber, pearlstone fillers, is a dispersion agent with water generally, adds tackiness agent, through loose, stir and the paste slurry made.During use, select suitable method to be coated on the working face surface as the case may be, play the effect of heat-insulation and heat-preservation.But asbestos are as filler, and when making and use the coating of the type, the asbestos dust of formation and evaporable particle are absorbed by people easily, and are difficult for excreting.This situation causes human body to produce major diseases such as lung cancer and skin carcinoma easily, and therefore, country has forbidden using in lagging material asbestos to do filler.Also have a kind of no asbestos environment-friendly type thermal insulating coating in the market, its main heat insulation aggregate is vacuum ceramic microballoon and aerosol, and its thermal insulation and the feature of environmental protection are promoted.But, to compare with the inorganic mineral of cheapness, the cost of vacuum ceramic microballoon is too high, and this makes the development of such coating be very restricted.
Summary of the invention
Technical problem to be solved by this invention provides a kind of compound heat-insulation coating that a kind of light weight, inexpensive, environmental protection are provided and preparation method thereof.
The invention provides a kind of novel environment-friendly heat insulating coating, by weight percentage, comprise: 10-50% film forming matter, 1-30% expanded vermiculite, 5-25% sepiolite, 1-20% tiny balloon, 0.5-5% wetting agent, 0.5-5% dispersion agent, 0.5-5% defoamer, 0.5-5% silane coupling agent, 1-10% auxiliary agent and 10-50% solvent.
Described film forming matter according to the purposes difference, can be in organic-silicon-modified water soluble acrylic resin, benzene emulsion, organosilicon crylic acid latex, epoxy emulsion, the water glass one or more.
Described expanded vermiculite particle diameter is 0.1-200 μ m.
Its main component of described tiny balloon is soda-lime, borosilicate glass, and particle diameter is 1-200 μ m.
Described solvent is a water.
Described novel environment-friendly heat insulating coating also can comprise the organic or inorganic pigment of 1-10%.
The invention provides a kind of preparation method of novel environment-friendly heat insulating coating, comprising:
(1): expanded vermiculite is ground 1-10h with sand mill, vacuum filtration, dry back mortar grinds, and ground expanded vermiculite is crossed screen cloth, places 100-110 ℃ of convection oven oven dry 4-5h then, and moisture eliminator is preserved;
(2): with sepiolite 100-110 ℃ of oven dry 4-5h, moisture eliminator is preserved;
(3): with tiny balloon 100-110 ℃ of oven dry 4-5h, moisture eliminator is preserved;
(4): prepared expanded vermiculite, sepiolite, tiny balloon in step (1), step (2), the step (3) mixed, make the A component;
(5): add film forming matter, solvent, wetting agent, dispersion agent, defoamer, silane coupling agent and auxiliary agent in order, mix, make the B component;
(6): with A, B component thorough mixing, normal temperature stirs 0.5-10h down, obtains the insulating mold coating that the present invention mentions behind the froth breaking.
It is 0.1-200 μ m that screen cloth in the described step (1) satisfies its expanded vermiculite particle diameter that filters out.
Froth breaking in the described step (6) is vacuum froth breaking, ultrasonic wave froth breaking or static froth breaking.
The thermal insulating coating that the present invention is made is coated on the working face surface uniformly, and ambient cure behind the complete drying, can reach insulation, heat insulation effect.Coating thickness and concrete constructional method can be grasped flexibly according to customer requirement.
Technical characterstic of the present invention is that selected main heat insulation aggregate is an expanded vermiculite.Expanded vermiculite is nonpoisonous and tasteless, is a kind of inorganic silicate with laminate structure of effect of heat insulation excellence, and this material is abundant at the reserves of China, and price is extremely cheap.In addition, adding the tangible tiny balloon of reflecting effect in this coating, is a kind ofly to collect barrier and reflectivity is the compound thermal insulating coating of one.Technical characterstic of the present invention also is, the binding agent that this coating is selected for use is zero voc (or low voc) discharging, reduced in the coating use pollution to environment to greatest extent.The characteristics of the technology of the present invention also are, this coating is thick slurry, can be according to the difference of working conditions, take multiple constructional methods such as spraying, brushing, blade coating, avoided traditional lagging material to need the field erected then trouble of moulding in advance, simultaneously, also reduced the not good problem of heat insulation effect that exists seam to bring because of installation.In addition, this coating can also add various pigment as required, makes coating have the ideal appearance characteristics, plays certain decoration function.Coating of the present invention can well be used for the insulation of piping attachments such as special-shaped equipment of petroleum chemical industry such as valve, spheroid, cone, rotator and printing and dyeing textile equipment; In addition, this coating also is a kind of good building heat preservation lagging material, insulation, the sound insulation field of exterior wall in can being used for.
Beneficial effect
(1) expanded vermiculite of the present invention is a kind of inorganic laminated silicate, and aboundresources is cheap, has good insulation, soundproof effect.Expanded vermiculite with cheapness is that heat insulation aggregate can play good heat insulating effect, reduces energy consumption, has important economic benefit;
(2) selection of water-based system, and replace easily carcinogenic asbestos in traditional thermal insulating coating with sepiolite, greatly reduce the influence that coating in use causes environment, have far-reaching social effect.
(3) also used a spot of tiny balloon in the coating, having formed collection isolation-type thermal insulating coating and reflection type thermal insulation is the compound thermal insulating coating of one, has further improved the thermal and insulating performance of coating.
Description of drawings
Fig. 1 is for being process flow sheet of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
(1): expanded vermiculite is ground 1h with sand mill, vacuum filtration, dry back mortar grinds, and ground expanded vermiculite is crossed 200 eye mesh screens, places 100 ℃ of convection oven oven dry 4h then, and moisture eliminator is preserved, and is standby;
(2): with 100 ℃ of oven dry of sepiolite 4h, moisture eliminator is preserved, and is standby;
(3): with 100 ℃ of oven dry of tiny balloon 4h, moisture eliminator is preserved, and is standby;
(4): prepared expanded vermiculite 44g, sepiolite 20g, tiny balloon 20g in difference weighing step (1), step (2), the step (3), its thorough mixing is even, make the A component;
(5): add organic-silicon-modified acrylic resin 200g, water 100g, wetting agent 2g, dispersion agent 5g, defoamer 2g, silane coupling agent 2g in order respectively, other auxiliary agent 5g mixes, and makes the B component;
(6): with A, B component thorough mixing, normal temperature stirs 0.5h down, vacuumizes froth breaking and can obtain the insulating mold coating that the present invention mentions.
The thermal insulating coating that makes is brushed uniformly in surface of steel plate, and ambient cure behind the complete drying, is filmed once more, reaches 3mm up to the coating build.
With reference to standard GB/T10295, recording the thermal conductivity of this coating when medial temperature is 70 ℃ is 0.029W/ (mk); Cohesive strength is 586kPa.
Embodiment 2
(1): expanded vermiculite is ground 2h with sand mill, vacuum filtration, dry back mortar grinds, and ground expanded vermiculite is crossed 400 eye mesh screens, places 105 ℃ of convection oven oven dry 4.5h then, and moisture eliminator is preserved, and is standby;
(2): with 105 ℃ of oven dry of sepiolite cashmere 4.5h, moisture eliminator is preserved, and is standby;
(3): with 105 ℃ of oven dry of tiny balloon 4.5h, moisture eliminator is preserved, and is standby;
(4): prepared expanded vermiculite 40g, sepiolite 30g, tiny balloon 30g in difference weighing step (1), step (2), the step (3), its thorough mixing is even, make the A component;
(5): add organic-silicon-modified acrylic resin 200g, water 100g, wetting agent 3g, dispersion agent 6g, defoamer 3g, silane coupling agent 3g in order respectively, other auxiliary agent 5g mixes, and makes the B component;
(6): with A, B component thorough mixing, normal temperature stirs 1h down, and static froth breaking can obtain the insulating mold coating that the present invention mentions.
The thermal insulating coating that makes is brushed uniformly in surface of steel plate, and ambient cure behind the complete drying, is filmed once more, reaches 3mm up to the coating build.
With reference to standard GB/T10295, recording the thermal conductivity of this coating when medial temperature is 70 ℃ is 0.027W/ (mk); Cohesive strength is 554kPa.
Embodiment 3
(1): expanded vermiculite is ground 1h with sand mill, vacuum filtration, dry back mortar grinds, and ground expanded vermiculite is crossed 400 eye mesh screens, places 105 ℃ of convection oven oven dry 4.5h then, and moisture eliminator is preserved, and is standby;
(2): with 105 ℃ of oven dry of sepiolite cashmere 4.5h, moisture eliminator is preserved, and is standby;
(3): with 105 ℃ of oven dry of tiny balloon 4.5h, moisture eliminator is preserved, and is standby;
(4): prepared expanded vermiculite 40g, sepiolite 20g, tiny balloon 30g in difference weighing step (1), step (2), the step (3), its thorough mixing is even, make the A component;
(5): add benzene emulsion 120g, water 100g, wetting agent 2g, dispersion agent 5g, defoamer 4g, silane coupling agent 2g in order respectively, other auxiliary agent 5g mixes, and makes the B component;
(6): with A, B component thorough mixing, normal temperature stirs 1h down, and static froth breaking can obtain the insulating mold coating that the present invention mentions.
The thermal insulating coating that makes is brushed uniformly in surface of steel plate, and ambient cure behind the complete drying, is filmed once more, reaches 3mm up to the coating build.
With reference to standard GB/T10295, recording the thermal conductivity of this coating when medial temperature is 70 ℃ is 0.029W/ (mk); Cohesive strength is 814kPa.
Embodiment 4
(1): expanded vermiculite is ground 1h with sand mill, vacuum filtration, dry back mortar grinds, and ground expanded vermiculite is crossed 400 eye mesh screens, places 110 ℃ of convection oven oven dry 5h then, and moisture eliminator is preserved, and is standby;
(2): with 110 ℃ of oven dry of sepiolite cashmere 5h, moisture eliminator is preserved, and is standby;
(3): with 110 ℃ of oven dry of tiny balloon 5h, moisture eliminator is preserved, and is standby;
(4): prepared expanded vermiculite 40g, sepiolite 20g, tiny balloon 30g in difference weighing step (1), step (2), the step (3), its thorough mixing is even, make the A component;
(5): add organosilicon crylic acid latex 120g, water 100g, wetting agent 4g, dispersion agent 6g, defoamer 4g, silane coupling agent 3g in order respectively, other auxiliary agent 5g mixes, and makes the B component;
(6): with A, B component thorough mixing, normal temperature stirs 10h down, vacuumizes froth breaking and can obtain the insulating mold coating that the present invention mentions.
The thermal insulating coating that makes is brushed uniformly in surface of steel plate, and ambient cure behind the complete drying, is filmed once more, reaches 3mm up to the coating build.
With reference to standard GB/T10295, recording the thermal conductivity of this coating when medial temperature is 70 ℃ is 0.035W/ (mk); Cohesive strength is 850kPa.
Below be the comparison of the coating of embodiment 1-4 preparation and market like product thermal conductivity and cohesive strength when medial temperature is 70 ℃.
The performance synopsis:
Performance Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 The market like product
70 ℃ of thermal conductivity W/ of medial temperature (mk) ?0.029 ?0.027 ?0.029 ?0.035 ??0.050
Cohesive strength kPa ?586 ?554 ?814 ?850 ??495

Claims (9)

1. novel environment-friendly heat insulating coating, by weight percentage, comprise: 10-50% film forming matter, 1-30% expanded vermiculite, 5-25% sepiolite, 1-20% tiny balloon, 0.5-5% wetting agent, 0.5-5% dispersion agent, 0.5-5% defoamer, 0.5-5% silane coupling agent, 1-10% auxiliary agent and 10-50% solvent.
2. a kind of novel environment-friendly heat insulating coating according to claim 1 is characterized in that, described film forming matter is one or more in organic-silicon-modified water soluble acrylic resin, benzene emulsion, organosilicon crylic acid latex, epoxy emulsion, the water glass.
3. a kind of novel environment-friendly heat insulating coating according to claim 1 is characterized in that, described expanded vermiculite particle diameter is 0.1-200 μ m.
4. a kind of novel environment-friendly heat insulating coating according to claim 1 is characterized in that, the main component of described tiny balloon is soda-lime, borosilicate glass, and particle diameter is 1-200 μ m.
5. a kind of novel environment-friendly heat insulating coating according to claim 1 is characterized in that, described solvent is a water.
6. a kind of novel environment-friendly heat insulating coating according to claim 1 is characterized in that, described novel environment-friendly heat insulating coating also comprises the organic or inorganic pigment of 1-10%.
7. the preparation method of a novel environment-friendly heat insulating coating comprises:
(1): expanded vermiculite is ground 1-10h with sand mill, vacuum filtration, dry back mortar grinds, and ground expanded vermiculite is crossed screen cloth, places 100-110 ℃ of convection oven oven dry 4-5h then, and moisture eliminator is preserved;
(2): with sepiolite 100-110 ℃ of oven dry 4-5h, moisture eliminator is preserved;
(3): with tiny balloon 100-110 ℃ of oven dry 4-5h, moisture eliminator is preserved;
(4): prepared expanded vermiculite, sepiolite, tiny balloon in step (1), step (2), the step (3) mixed, make the A component;
(5): add film forming matter, solvent, wetting agent, dispersion agent, defoamer, silane coupling agent and auxiliary agent in order, mix, make the B component;
(6): with A, B component thorough mixing, normal temperature stirs 0.5-10h down, obtains insulating mold coating of the present invention behind the froth breaking.
8. the preparation method of a kind of novel environment-friendly heat insulating coating according to claim 7 is characterized in that, it is 0.1-200 μ m that the screen cloth in the described step (1) satisfies its expanded vermiculite particle diameter that filters out.
9. the preparation method of a kind of novel environment-friendly heat insulating coating according to claim 7 is characterized in that, the froth breaking in the described step (6) is vacuum froth breaking, ultrasonic wave froth breaking or static froth breaking.
CN200910197647A 2009-10-23 2009-10-23 Novel environment-friendly heat insulating coating and preparation method thereof Pending CN101696336A (en)

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CN101875805A (en) * 2010-05-31 2010-11-03 刘昆虎 Reflection type thermal insulation waterproof coating
CN102251402A (en) * 2011-05-23 2011-11-23 开平市日固力涂料有限公司 Heat insulation coating for textiles
CN103045026A (en) * 2012-12-26 2013-04-17 燕山大学 Waterproof corrosion-resistant heat-insulating coating
CN103146208A (en) * 2013-03-20 2013-06-12 武汉理工大学 Expanded vermiculite/aluminium hydroxide synergetic flame retardant asphalt and preparation method thereof
CN103232775A (en) * 2013-05-31 2013-08-07 滁州市宏源喷涂有限公司 Water-soluble anticorrosive coating and preparation method thereof
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Open date: 20100421