CN102352159B - Water-based phase-change microspherical thermal-insulation paint for internal walls and preparation method thereof - Google Patents
Water-based phase-change microspherical thermal-insulation paint for internal walls and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a water-based phase-change microspherical thermal-insulation paint for internal walls, which is characterized by comprising the following components in percentage by weight: 20-40% of acrylic emulsion, 0.1-5% of wetting agent, 0.1-5% of dispersant, 5-20% of kieselguhr, 5-10% of paraffin phase-change microsphere, 5-20% of titanium white, 0.1-5% of thickening agent, 1-10% of kaolin, 3-10% of non-transparent polymer and the balance of water. Since the paraffin phase-change microsphere material is introduced, the water-based phase-change microspherical thermal-insulation paint has the advantages of favorable thermal-insulation effect and favorable weather resistance, can effectively resist cracking, fundamentally solves the problem that the thermal-insulation paint can be easily restricted by atmospheric environment, coating, wave band and the like, and has wide application range.
Description
Technical field
The present invention relates to the thermal insulation coatings field, relate in particular to a kind of water-based phase change microsphere inner wall heat-preservation coating for the inner wall of building surface and preparation method thereof.
Background technology
Saving energy and reduce the cost, increasing economic efficiency is one of elementary object of scientific research and technological development, and coating technology is no exception.After the seventies in 20th century, world climate warms, and earth energy is exhausted day by day.Therefore, the exploitation thermal insulation coatings especially has bigger realistic meaning with the closely-related building thermal-insulating coating of human lives.In AND ENERGY RESOURCES CONSUMPTION IN CHINA, building energy consumption accounts for 1/4 of national energy consumption greatly, and lagging material for building accounts for about 11% of total amount, and visible building energy conservation potentiality are very big.Popularize energetically abroad under the background of lagging material, can predict, China will progressively put into effect the rules that need take the heat-insulation and heat-preservation measure to new dwelling house.
At present thermal insulation coatings mainly adopt absorption/radiation of regulating coating than, increase mechanism and patterns such as the thermal resistance of coating and ir radiation refrigeration, but exist in actual use overweight coating, temperature control effect be subjected to atmosphere and effect of dust, to the equal shortcoming of the temperature control effect of different-waveband.At the problems referred to above, people actively seek the thermal insulation coatings based on other mechanism and pattern.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of water-based phase change microsphere inner wall heat-preservation coating and preparation method thereof, be intended to solve that coating heat insulation effect in the prior art is poor, the opposing crack performance is poor, water-fast, weathering resistance is poor, be subject to atmospheric environment, the problem of restrictions such as coating and wave band.
Technical scheme of the present invention is as follows:
A kind of water-based phase change microsphere inner wall heat-preservation coating, wherein, described water-based phase change microsphere inner wall heat-preservation coating, by weight percentage, mainly composed of the following components:
ACRYLIC EMULSION 20 ~ 40%, wetting agent 0.1 ~ 5%, dispersion agent 0.1 ~ 5%, diatomite 5 ~ 20%, wax phase change microballoon 5 ~ 10%, titanium dioxide 5 ~ 25%, thickening material 0.1 ~ 5%, kaolin 1 ~ 10%, Opacifying polymers 3 ~ 10%, surplus are water.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, described wax phase change microballoon is made up of paraffin and the polymer shell enclosed; Described paraffin is packaged in the polymer shell.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, the mean diameter of described wax phase change microballoon is 6 ~ 45 microns.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, described Opacifying polymers is the hollow polymer spheroid;
The shell of described hollow polymer spheroid is the polymkeric substance that acrylate and vinylbenzene are formed.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, described wetting agent is the polyethenoxy ether class wetting agent.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, described dispersion agent is high molecular weight polypropylene acid ammonium salt dispersion agent.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, described titanium dioxide is Rutile type Titanium Dioxide.
Described water-based phase change microsphere inner wall heat-preservation coating, wherein, described thickening material is alkali swelling property class and hydrophobically modified polyurethanes thickening material.
Described water-based phase change microsphere inner wall heat-preservation coating wherein, also comprises in the described water-based phase change microsphere inner wall heat-preservation coating: other auxiliary agents 1 ~ 5%;
Described auxiliary agent is one or more in mould inhibitor, sanitas, antiseptic-germicide or the frostproofer.
The preparation method of above-mentioned water-based phase change microsphere inner wall heat-preservation coating, wherein, the preparation method of described water-based phase change microsphere inner wall heat-preservation coating may further comprise the steps:
Earlier take by weighing raw material according to formula rate, low-speed stage adds the water of part and whole wetting agent, dispersion agent, Rutile type Titanium Dioxide, diatomite and kaolin successively, and middling speed stirs; The hydrophobically modified polyurethane thickener that adds part treats that above raw material adding finishes high speed dispersion; Continuation adds ACRYLIC EMULSION, wax phase change microballoon, Opacifying polymers, alkali swelling class thickening material and remaining hydrophobically modified polyurethane thickener, remaining water and other compositions under middling speed stirs, middling speed stirs, more after filtration, and the packing of weighing.
Beneficial effect: water-based phase transformation micro-sphere insulation heat coating provided by the invention and preparation method thereof, owing to introduced the wax phase change micro-sphere material, its high insulating effect, weathering resistance is good, is highly resistant to crackle, has improved the insulated capacity of body of wall, saved energy consumption, improved comfort level, also fundamentally solved the restriction problem that thermal insulation coatings is subject to atmospheric environment, coating and wave band etc., used very extensive.
Description of drawings
Fig. 1 is the heat-insulating property test curve figure of water-based phase transformation micro-sphere insulation heat coating of the present invention.
Embodiment
The invention provides a kind of water-based phase change microsphere inner wall heat-preservation coating and preparation method thereof, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
Utilizing the latent-heat storage function of phase change material to reach effects such as building temperature adjustment, waste heat storage, auxiliary regenerator, storage of solar energy utilization, is one of the effective ways of the realization building energy conservation that attracts most attention at present and research direction.Microcapsulary is a kind ofly with film forming material liquid or solid to be coated, and makes it to form the technology of micron or mm granules.Phase change material is coated on the formed particle of microcapsule is called phase-change material micro-capsule, it has special temp regulating function.The phase change material of microcapsule core can undergo phase transition with outside temperature, but that surface coated polymeric membrane then remains is solid-state.In the envrionment temperature elevation process, when temperature is higher than transformation temperature, the heat in the capsule phase change material absorbing environmental in the heart undergoes phase transition, until being liquid by solid state transformation all; And when envrionment temperature was lower than transformation temperature, the phase change material of capsule-core was emitted the heat of absorption, liquid-solid phase takes place change.This heat absorption and heat release function can make the temperature of surface of microcapsule keep constant relatively within a certain period of time.The advantage of microencapsulated phase change material be to reduce or avoid phase change material and environment reaction, increase heat transfer area, guarantee that phase transformation occurs in the wall material.Because based on the thermal characteristics of the thermal insulation coatings uniqueness of phase change material, it is to give the object temperature regulatory function the most cheap and the easiest method.This class thermal insulation coatings has great demand.Along with the maturation of thermal insulation coatings technology, the method that is replaced doing thermal insulation layer by the brushing thermal insulation coatings has begun to enter the practical stage fully, and it will change tradition insulation cold insulation mode.The application of thermal insulation coatings technology on vehicle, boats and ships, oil storage (gas) jar, refrigerating apparatus and conditioning unit will reduce the thickness of thermal insulation layer widely and simplify construction technology, improve energy use efficiency, and saving equipment is for the volume and the space that are incubated.
The present invention introduces phase change material in the inner wall heat-preservation coating, prepare a kind of thermal control paint based on phase-change mechanism, thereby fundamentally solve the restriction that thermal insulation coatings is subjected to atmospheric environment, coating and wave band, phase change material (PCM) has two big characteristics in phase transition process: follow a large amount of latent heat and temperature to keep constant.Phase change material is divided into the solid-solid phase change material and solid-liquid phase becomes material two big classes.The solid-solid phase change material mainly is the cross-linking crystal polymer, as polyolefine and polyoxyethylene glycol, is characterized in keeping in the phase transition process solid state, the transformation temperature height.Gu-liquid phase becomes material hydrated inorganic salt, hydro carbons, higher fatty acid and high fatty alcohol are arranged, be characterized in that heat of phase transformation is big, transformation temperature suitable and phase transition process liquefaction.Because solid-solid phase transition material transformation temperature height at room temperature is difficult to realize that therefore, the present invention adopts the solid-liquid phase change material, specifically adopts the wax phase change microballoon.It is a kind of microspheric form thermoplasticity particulate, and when outside temperature raise, solid paraffin absorbed heat, undergoes phase transition after heat absorption is enough, and solid paraffin is converted into whiteruss; After outside temperature reduced, the whiteruss release of heat underwent phase transition after release is enough, and whiteruss is converted into solid.This heat absorption and heat release function can make the temperature of wax phase change microsphere surface keep constant relatively within a certain period of time.
The wax phase change microballoon that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is made up of paraffin and the polymer shell enclosed, namely by this polymer shell the paraffin wrapping and encapsulating, formation wax phase change microballoon.This polymer shell composition is melmac or acrylic resin, this resin good film-forming property, and chemical stability is good, not only has good toughness and permeability resistance, also has good wear resistance, water tolerance and thermotolerance.Wax phase change microballoon of the present invention can prevent the leakage problem that paraffin brings when being converted into liquid by solid; also because paraffin and other matrixes of encapsulation are isolated; protected the chemical property of paraffin effectively; and this phase change microsphere also has advantages such as elasticity excellence, light weight, chemicals-resistant, low gas permeability, excellent mechanical intensity, and the utmost point is applicable to building coating.
The mean diameter of the wax phase change microballoon that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is the 6-45 micron, can effectively increase specific surface area and the thermal conductivity of wax phase change microballoon, thereby make paraffin fast temperature sensor variation and absorb heat and exothermic process, also strengthen the heat storage capacity of wax phase change microballoon, further improved the heat-insulating property of coating.
The present invention can be by regulating the paraffin carbon chain lengths control transformation temperature in the wax phase change microballoon, the wax phase change microballoon transformation temperature that the present invention adopts is about 20-25 ℃, enthalpy of phase change＞100J/g, this temperature is applicable to most of places, namely when outside temperature is higher than transformation temperature, the paraffin heat absorption also undergoes phase transition, solid paraffin is converted into whiteruss, when outside temperature is lower than transformation temperature, the paraffin heat release also undergoes phase transition, whiteruss is converted into solid paraffin, thereby outside temperature is remained near the transformation temperature within a certain period of time.
Water-based phase change microsphere inner wall heat-preservation coating of the present invention, by weight percentage, mainly composed of the following components:
ACRYLIC EMULSION 20 ~ 40%, wetting agent 0.1 ~ 5%, dispersion agent 0.1 ~ 5%, diatomite 5 ~ 20%, wax phase change microballoon 5 ~ 10%, titanium dioxide 5 ~ 25%, thickening material 0.1 ~ 5%, kaolin 1 ~ 10%, Opacifying polymers 3 ~ 10%, surplus are water.
Can also comprise component down in the described water-based phase change microsphere inner wall heat-preservation coating:
Other coatings additive(s)s (as mould inhibitor, sanitas, antiseptic-germicide, frostproofer etc.) 1～5%.
The ACRYLIC EMULSION that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is polymerized emulsion, and it has excellent elasticity and the good anti-performance that stains, and formed filming is highly resistant to crackle, and weathering resistance is good.
Added the kaolin that can effectively reduce coating volume density and thermal conductivity in the water-based phase change microsphere inner wall heat-preservation coating of the present invention.Because the thermal conductivity of kaolin own is low, and have microvoid structure, density is little, good mechanical property, hydrophobicity are strong, can reduce the volume density of coating effectively, can pin more still air in coating inside during film forming, thereby reduce the thermal convection of coating thermal conductivity and obstruct air effectively.This has just greatly strengthened the heat insulation effect of coating.
The Opacifying polymers that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is preferably the hollow polymer spheroid, this sphere shell is the polymkeric substance of forming with acrylate and vinylbenzene, the second-order transition temperature of this polymkeric substance is very high, this hollow polymer spheroid can provide opacifying power, can replace the part titanium dioxide, not participate in film forming simultaneously.The Opacifying polymers that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts has fabulous covering performance, can improve the water-fast and weather resistance of filming.
The titanium dioxide that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is preferably Rutile type Titanium Dioxide, and this titanium dioxide has characteristics such as high gloss, covering and dispersing property excellence.
The diatomite that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts has good thermal insulation, filling and dispersing property, can further improve the performance of thermal insulation coatings of the present invention.
The wetting agent that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is preferably the polyoxyethylene wetting agent.
The dispersion agent that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is the ammonium polyacrylate dipersant of high molecular.
The thickening material that water-based phase change microsphere inner wall heat-preservation coating of the present invention adopts is mainly alkali swelling property class and hydrophobically modified polyurethanes thickening material.
Water-based phase change microsphere inner wall heat-preservation coating of the present invention also comprises auxiliary agent, and auxiliary agent mainly is made up of in mould inhibitor, sanitas, antiseptic-germicide or the frostproofer etc. one or more.
The manufacture method of water-based phase change microsphere inner wall heat-preservation coating of the present invention:
Earlier take by weighing raw material according to formula rate, low-speed stage adds the water of part and whole wetting agent, dispersion agent, Rutile type Titanium Dioxide, diatomite and kaolin successively, and middling speed stirs 3 ~ 5min; The hydrophobically modified polyurethane thickener that adds part treats that above raw material adding finishes high speed dispersion 15min; Continuation adds ACRYLIC EMULSION, wax phase change microballoon, Opacifying polymers, alkali swelling class thickening material and remaining hydrophobically modified polyurethane thickener, remaining water and other compositions under middling speed stirs, middling speed stirs 15min again, more after filtration, and the packing of weighing.
Wherein, described stirring at low speed refers to that the rotating speed of agitating vane is between 500 rev/mins ~ 800 rev/mins, high-speed stirring refers to the rotating speed of agitating vane between 1000 rev/mins ~ 1500 rev/mins, and middling speed stirs and refers to that the rotating speed of agitating vane is between 800 rev/mins ~ 1000 rev/mins.
Water-based phase change microsphere inner wall heat-preservation coating provided by the invention is safe from harm to human body and environment owing to adopt water-based emulsion, belongs to Green Product.Product has when heating also slow characteristics of cooling when heating up slow, heat radiation.In hot summer, this coating can intercept heat energy effectively and transmit in the inlet chamber from wall, makes the indoor relatively low temperature that remains in south; At northern cold winter, when making room temp, heating installation raises, and effectively trap heat is distributed to outdoor, reduces the loss of heat, and when room temp reduces, can slowly discharge heat energy, the loss of reinforcement heat.Can moderately regulate room temp, make living environment more comfortable.This product construction is very convenient, by adding different other mill bases, can provide multiple color to select, and has good decoration and defencive function.
Below, preferred embodiment of the present invention is described further:
Embodiment one:
Embodiment: novel heat insulation coating, its formulation ratio are (weight percent):
| Deionized water: 32.8 | Opacifying polymers: 5 |
| Dispersion agent: 0.5 | Alkali swelling class thickening material: 0.2 |
| Rutile type Titanium Dioxide: 10 | Hydrophobically modified polyurethane thickener: 1 |
| Kaolin: 3 | Wax phase change microballoon: 10 |
| Diatomite: 5 | Wetting agent: 0.5 |
| ACRYLIC EMULSION: 29.5 | Other auxiliary agents: 2.5 |
Earlier take by weighing raw material according to formula rate, low-speed stage adds 15 parts of deionized waters successively, 0.5 part of wetting agent, 0.5 part of dispersion agent, 10 parts of Rutile type Titanium Dioxides, 3 parts of 5 parts in diatomite and kaolin, middling speed stirs 3 ~ 5min, add 0.5 part of hydrophobically modified polyurethane thickener, treat that above raw material adding finishes, high speed dispersion 15min, continue afterwards under middling speed stirs, add 29.5 parts of ACRYLIC EMULSION, 10 parts of wax phase change microballoons, 5 parts of Opacifying polymers, 0.5 part of 0.2 part of alkali swelling class thickening material and hydrophobically modified polyurethane thickener, remaining water and other compositions, middling speed stirs 15min again, again after filtration, the packing of weighing.
Embodiment two:
Embodiment: novel heat insulation coating, its formulation ratio are (weight percent):
| Deionized water: 31.3 | Opacifying polymers: 3 |
| Dispersion agent: 0.5 | Alkali swelling class thickening material: 0.2 |
| Rutile type Titanium Dioxide: 10 | Hydrophobically modified polyurethane thickener: 1 |
| Kaolin: 1 | Wax phase change microballoon: 8 |
| Diatomite: 10 | Wetting agent: 0.5 |
| ACRYLIC EMULSION: 31.5 | Other auxiliary agents: 2.5 |
Earlier take by weighing raw material according to formula rate, low-speed stage adds 15 parts of deionized waters successively, 0.5 part of wetting agent, 0.5 part of dispersion agent, 10 parts of Rutile type Titanium Dioxides, 1.5 parts of 10 parts in diatomite and kaolin, middling speed stirs 3 ~ 5min, add 0.5 part of hydrophobically modified polyurethane thickener, treat that above raw material adding finishes, high speed dispersion 15min, continue afterwards under middling speed stirs, add 31.5 parts of ACRYLIC EMULSION, 8 parts of wax phase change microballoons, 3 parts of Opacifying polymers, 0.5 part of 0.2 part of alkali swelling class thickening material and hydrophobically modified polyurethane thickener, surplus water and other compositions, middling speed stirs 15min again, again after filtration, the packing of weighing.
Embodiment three:
Embodiment: novel heat insulation coating, its formulation ratio are (weight percent):
| Deionized water: 25.8 | Opacifying polymers: 10 |
| Dispersion agent: 0.5 | Alkali swelling class thickening material: 0.2 |
| Rutile type Titanium Dioxide: 12 | Hydrophobically modified polyurethane thickener: 1 |
| Kaolin: 1 | Wax phase change microballoon: 5 |
| Diatomite: 8 | Wetting agent: 0.5 |
| ACRYLIC EMULSION: 33.5 | Other auxiliary agents: 2.5 |
Earlier take by weighing raw material according to formula rate, low-speed stage adds 15 parts of deionized waters successively, 0.5 part of wetting agent, 0.5 part of dispersion agent, 12 parts of Rutile type Titanium Dioxides, 1 part of 8 parts in diatomite and kaolin, middling speed stirs 3 ~ 5min, add 0.5 part of hydrophobically modified polyurethane thickener, treat that above raw material adding finishes, high speed dispersion 15min, continue afterwards under middling speed stirs, add 33.5 parts of ACRYLIC EMULSION, 5 parts of wax phase change microballoons, 10 parts of Opacifying polymers, 0.5 part of 0.2 part of alkali swelling class thickening material and hydrophobically modified polyurethane thickener, surplus water and other compositions, middling speed stirs 15min again, again after filtration, the packing of weighing.
Embodiment four:
Embodiment: novel heat insulation coating, its formulation ratio are (weight percent):
| Deionized water: 20 | Opacifying polymers: 5 |
| Dispersion agent: 0.5 | Alkali swelling class thickening material: 0.2 |
| Rutile type Titanium Dioxide: 5 | Hydrophobically modified polyurethane thickener: 0.5 |
| Kaolin: 2 | Wax phase change microballoon: 5 |
| Diatomite: 20 | Wetting agent: 0.5 |
| ACRYLIC EMULSION: 40 | Other auxiliary agents: 1.3 |
Earlier take by weighing raw material according to formula rate, low-speed stage adds 15 parts of deionized waters successively, 0.5 part of wetting agent, 0.5 part of dispersion agent, 10 parts of Rutile type Titanium Dioxides, 2 parts of 20 parts in diatomite and kaolin, middling speed stirs 3 ~ 5min, add 0.5 part of hydrophobically modified polyurethane thickener, treat that above raw material adding finishes, high speed dispersion 15min, continue afterwards under middling speed stirs, add 40 parts of ACRYLIC EMULSION, 5 parts of wax phase change microballoons, 5 parts of Opacifying polymers, 0.2 part of alkali swelling class thickening material, surplus water and other compositions, middling speed stirs 15min again, again after filtration, the packing of weighing.
Embodiment five:
Embodiment: novel heat insulation coating, its formulation ratio are (weight percent):
| Deionized water: 40 | Opacifying polymers: 5 |
| Dispersion agent: 0.5 | Alkali swelling class thickening material: 0.2 |
| Rutile type Titanium Dioxide: 5 | Hydrophobically modified polyurethane thickener: 0.5 |
| Kaolin: 10 | Wax phase change microballoon: 5 |
| Diatomite: 12 | Wetting agent: 0.5 |
| ACRYLIC EMULSION: 20 | Other auxiliary agents: 1.3 |
Earlier take by weighing raw material according to formula rate, low-speed stage adds 15 parts of deionized waters successively, 0.5 part of wetting agent, 0.5 part of dispersion agent, 10 parts of Rutile type Titanium Dioxides, 10 parts of 12 parts in diatomite and kaolin, middling speed stirs 3 ~ 5min, add 0.5 part of hydrophobically modified polyurethane thickener, treat that above raw material adding finishes, high speed dispersion 15min, continue afterwards under middling speed stirs, add 20 parts of ACRYLIC EMULSION, 5 parts of wax phase change microballoons, 5 parts of Opacifying polymers, 0.2 part of alkali swelling class thickening material, surplus water and other compositions, middling speed stirs 15min again, again after filtration, the packing of weighing.
Embodiment six:
Embodiment: novel heat insulation coating, its formulation ratio are (weight percent):
| Deionized water: 29.5 | Opacifying polymers: 5 |
| Dispersion agent: 5 | Alkali swelling class thickening material: 0.1 |
| Rutile type Titanium Dioxide: 25 | Hydrophobically modified polyurethane thickener: 0.1 |
| Kaolin: 2 | Wax phase change microballoon: 5 |
| Diatomite: 5 | Wetting agent: 2 |
| ACRYLIC EMULSION: 20 | Other auxiliary agents: 1.3 |
Earlier take by weighing raw material according to formula rate, low-speed stage adds 15 parts of deionized waters successively, 2 parts of wetting agents, 5 parts of dispersion agents, 25 parts of Rutile type Titanium Dioxides, 2 parts of 5 parts in diatomite and kaolin, middling speed stirs 3 ~ 5min, add 0.1 part of hydrophobically modified polyurethane thickener, treat that above raw material adding finishes, high speed dispersion 15min, continue afterwards under middling speed stirs, add 20 parts of ACRYLIC EMULSION, 5 parts of wax phase change microballoons, 5 parts of Opacifying polymers, 0.1 part of alkali swelling class thickening material, surplus water and other compositions, middling speed stirs 15min again, again after filtration, the packing of weighing.
The heat-insulating property testing method:
1) respectively common coating and phase transformation micro-sphere insulation heat coating are coated in two identical 4L iron flask walls, thick 100 m that are all are done in coating, and surface covered is identical, and a week tests after doing;
2) two iron flasks are placed 50 ℃ of thermostat container internal heating 1h, make jar interior air themperature stable.Take out iron flask, tight capping places iron flask in 15 ℃ of thermostat containers, measures a jar interior air temperature variations.
Air temperature variations in the common coating of table 1 and the phase transformation micro-sphere insulation heat Lacquered Tin Plate Can
Be Comparative Examples with common coating, do the heat-insulating property test with the phase transformation micro-sphere insulation heat coating of embodiment 1 ~ 6, its test result is as shown in table 1.Data with embodiment 1 and common coating Comparative Examples are made synoptic diagram, as shown in Figure 1.
The heat-insulating property test result:
As table 1 and test result shown in Figure 1 as seen, along with the time increases, the air themperature in seven jars is all on a declining curve.The lowering speed of phase-change coating is less than common coating, and especially near 25 ℃, near air themperature time length this temperature is obviously more in the jar of phase-change coating.This is because two kinds of different coating are placed behind 50 ℃ the thermostat container behind the 1h simultaneously, air themperature and coating filament saturation in jar, but the paraffin of phase change microsphere in this temperature from the solid-state liquid state that become, stored more heat.The iron flask of filament saturation is placed the environment of lesser temps, and a heat begins to run off in jar, and air themperature descends gradually.Phase-change coating is owing to itself absorbed more heat, thereby the temperature fall is slower.Near 25 ℃, be that paraffin is the transformation temperature of solid phase from liquid-phase conversion, the heat that discharges in this temperature is maximum, thereby air themperature is comparatively stable near this temperature.Along with the time increases, the heat of phase change microsphere also almost discharges and finishes, thereby the air themperature in last seven jars is all near envrionment temperature.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, for those of ordinary skills, can be improved according to the above description or conversion that all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (5)
1. a water-based phase change microsphere inner wall heat-preservation coating is characterized in that, described water-based phase change microsphere inner wall heat-preservation coating is by weight percentage, composed of the following components:
ACRYLIC EMULSION 20 ~ 40%, wetting agent 0.1 ~ 5%, dispersion agent 0.1 ~ 5%, diatomite 5 ~ 20%, wax phase change microballoon 5 ~ 10%, titanium dioxide 5 ~ 25%, thickening material 0.1 ~ 5%, kaolin 1 ~ 10%, Opacifying polymers 3 ~ 10%, other auxiliary agent 1 ~ 5%, surplus are water;
Described other auxiliary agent is one or more in mould inhibitor, sanitas, antiseptic-germicide or the frostproofer;
Described thickening material is alkali swelling property class and hydrophobically modified polyurethanes thickening material;
Described titanium dioxide is Rutile type Titanium Dioxide;
Described wax phase change microballoon is made up of paraffin and the polymer shell enclosed; Described paraffin is packaged in the polymer shell;
The mean diameter of described wax phase change microballoon is 6 ~ 45 microns;
Described wax phase change microballoon transformation temperature is 20-25 ℃, enthalpy of phase change＞100J/g.
2. water-based phase change microsphere inner wall heat-preservation coating according to claim 1 is characterized in that described Opacifying polymers is the hollow polymer spheroid;
The shell of described hollow polymer spheroid is the polymkeric substance that acrylate and vinylbenzene are formed.
3. water-based phase change microsphere inner wall heat-preservation coating according to claim 1 is characterized in that described wetting agent is the polyethenoxy ether class wetting agent.
4. water-based phase change microsphere inner wall heat-preservation coating according to claim 1 is characterized in that, described dispersion agent is high molecular weight polypropylene acid ammonium salt dispersion agent.
5. the preparation method of the described water-based phase of claim 1 a change microsphere inner wall heat-preservation coating is characterized in that, the preparation method of described water-based phase change microsphere inner wall heat-preservation coating may further comprise the steps:
Earlier take by weighing raw material according to formula rate, low-speed stage adds the water of part and whole wetting agent, dispersion agent, Rutile type Titanium Dioxide, diatomite and kaolin successively, and middling speed stirs; The hydrophobically modified polyurethane thickener that adds part treats that above raw material adding finishes high speed dispersion; Continuation adds ACRYLIC EMULSION, wax phase change microballoon, Opacifying polymers, alkali swelling class thickening material and remaining hydrophobically modified polyurethane thickener, remaining water and other auxiliary agent under middling speed stirs, middling speed stirs, more after filtration, and the packing of weighing.
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| US5106520A (en) * | 1985-11-22 | 1992-04-21 | The University Of Dayton | Dry powder mixes comprising phase change materials |
| CN101838493A (en) * | 2010-05-28 | 2010-09-22 | 中华制漆（深圳）有限公司 | Heat-insulating coating for inner wall |
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| US20210340387A1 (en) * | 2019-01-11 | 2021-11-04 | Matthew Aguayo | Composite coatings containing phase change materials |
| US12264263B2 (en) * | 2019-01-11 | 2025-04-01 | Arizona Board Of Regents On Behalf Of Arizona State University | Composite coatings containing phase change materials |
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