Heat-storage temperature-adjustment interior wall water-based coating and preparation method thereof

A kind of water-based paint for heat storage and temperature regulation internal wall and its preparation method Technical field

[0001] The present invention relates to the technical field of coatings, in particular to a heat storage and temperature regulation water-based paint for interior walls and a preparation method thereof.

Background technique

[0002] Building energy consumption occupies a large part of the total energy consumption of society. In order to solve the problem of building energy consumption, people have turned their attention to phase change materials.

[0003] Phase change material is a kind of thermal functional material that can absorb or release latent heat. Unlike thermal insulation wall materials, the application of phase change materials in buildings is not limited to thermal insulation. It can also participate in the storage and utilization of building thermal energy, so that Phase change materials can produce heat insulation and heat preservation effects that are several times that of the same amount of traditional heat preservation materials. At the same time, the frequency of indoor air temperature fluctuations can be reduced through the cycle of high temperature absorption and low temperature release, and the temperature can be maintained for a long period of time. The required temperature is close to increase the comfort of the human body, and at the same time achieve the purpose of energy saving, which is in line with the current trend of the development of buildings in the direction of multi-storey and light-weight structures, making the building energy-saving effect more significant.

[0004] At present, the use of phase change materials in buildings is mainly concentrated in the field of interior wall coatings. By filling phase change materials with heat storage function in the coating, the phase change materials absorb and release heat, so as to achieve the regulation of indoor temperature. purpose. However, the temperature regulation performance and heat storage performance of the existing phase change thermal insulation coatings are not up to the requirements, and the phase change material itself has volume changes, which are prone to problems such as phase change material leakage and phase separation, which affects the temperature regulation performance of the phase change material At the same time, due to the change in the volume of the phase change material itself, the paint coating will crack, which will further affect the temperature regulation performance of the phase change material.

[0005] To this end, a Chinese patent (application number: 201010124626.5) discloses a composite phase change energy storage architectural coating and a preparation method thereof. The phase change energy storage composite material adopts expanded perlite as the matrix material, and forms a composite phase change energy storage material with room temperature ionic liquids, linear fatty acids, alkanes and other phase change materials, and then combined with styrene-acrylic emulsion, pure acrylic emulsion, and ethyl acetate. One or more of the acrylic emulsion is mixed to form a polymer film-forming material according to a certain proportion, fully stirred and mixed evenly, and then left to stand to obtain an architectural coating with phase change energy storage function. The phase change energy storage composite material adopts the vacuum adsorption method to absorb the organic phase change material into the porous structure of the expanded perlite. It has the problem of insufficient adsorption of the organic phase change material and easy leakage after multiple cycles, thus affecting The temperature adjustment effect of the phase change material, and the volume change of the phase change material in the phase change process can easily cause the coating to crack, thereby affecting the temperature adjustment effect of the coating.

[0006] A Chinese patent (application number: 201410745281.3) discloses a heat-storage and temperature-regulating interior wall water-based paint and a preparation method thereof, which are made of raw materials with the following weight ratio: 15-40 parts of water, dispersed 0.4-0.8 parts of wetting agent, 0.2-0.4 parts of defoamer, 8-25 parts of titanium dioxide, 0.05-0.1 parts of pH regulator, 5-15 parts of heavy calcium carbonate, 510 parts of kaolin, 6-15 parts of talc powder, 15-40 parts of pure acrylic emulsion, 1.5-3.0 parts of film-forming aids, 0.8-1.0 parts of antifreeze, 0.1-0.8 parts of antifungal agent, 5-10 parts of phase change microcapsule emulsion, increase Thickening agent 0.3-0.8 parts, leveling agent 0.1-0.8 parts; the heat storage and temperature-regulating interior wall water-based paint not only has the function of appearance decoration, but also realizes the function of two-way and reversible temperature regulation. The coating uses phase change microcapsule emulsion to relieve the coating cracking problem to a certain extent, but the effect is limited, and the coating cracking problem still exists, which affects the heat storage and temperature adjustment effect of the coating.

[0007] Based on this, it is necessary to provide a heat storage and temperature regulation internal wall water-based paint and a preparation method thereof to solve the problems existing in the prior art.

Summary of the invention

[0008] In view of the above analysis of the prior art, the present invention provides a heat storage and temperature control internal wall water-based paint, which solves the problem of easy cracking of the previous heat storage and temperature control coatings, and ensures the stability of the heat storage and temperature control of the coating, and The coating of the invention has the advantages of large phase change latent heat, high energy storage, strong heat preservation ability and the like. At the same time, the use of phase change microcapsules has good volume stability, is not easy to leak, and has strong temperature adjustment ability.

[0009] In order to achieve the above purpose, the present invention is achieved through the following technical solutions:

[0010] A heat-storage and temperature-regulating interior wall water-based paint, which is composed of the following components in parts by weight: Shi Qiao/hollow microbeads-20-35 parts of organic silicon tree and phase change microcapsules; Water-based emulsion 45- 55 parts; 30-40 parts of hydroxy acrylic resin; 15-20 parts of carbon-based polyester resin; 5To parts of thermally conductive filler;

[0011] Sodium lignosulfonate 1.3T.8 parts; Film-forming aids 2. 2-3. 0 parts; Leveling agent 0.5T.5 parts; pH regulator 0.2-0. 6 parts; Go 60-70 parts of ionized water;

[0012] Wherein, the paraffin/hollow microbeads-silicone resin phase change microcapsules use paraffin as the phase change material, hollow microbeads as the carrier for loading paraffin, and silicone resin as the capsule of the phase change microcapsules wall.

[0013] Preferably, the outer surface of the paraffin/hollow microbeads-silicone resin phase change microcapsules is coated with a thermally conductive layer, and the thermally conductive layer is made of the following parts by weight of raw materials: 3-5 parts of epoxy acrylic resin, 2 parts of polyethylene wax, 5 parts of nano alumina powder 0.5L, 2-4 parts of carbon fiber, 3 parts of isopropanol.

[0014] Preferably, the method for preparing the thermally conductive layer is: adding epoxy acrylic resin to isopropanol according to the formula amount, fully stirring to make it dissolve completely, then adding polyethylene wax, stirring evenly, and then adding nano Alumina powder, after fully stirring, ultrasonic for 8min, and finally adding carbon fiber, stirring evenly to obtain a thermal conductive layer.

[0015] Preferably, the preparation method of the paraffin/hollow beads-silicone resin phase change microcapsules is:

[0016] The hollow microspheres are placed in an acetone solution, ultrasonically cleaned for 10 minutes, filtered with deionized water, and then dried under vacuum for use;

[0017] Weigh a certain amount of paraffin and heat it to melt, add an emulsifier after the paraffin is completely melted, and use a high-speed emulsifier to emulsify the paraffin solution, and then place it in a three-necked flask for heating in a water bath at 60. . Keep the temperature for 20 minutes to obtain the paraffin emulsion;

[0018] Weigh the silicone resin, and seal it under a nitrogen atmosphere, heating and stirring for 30 minutes, the heating temperature is 70 °C, to obtain the silicone resin slurry;

[0019] (4) Add the paraffin emulsion prepared in step (2) dropwise to the hollow microbeads in step (1), stir while dripping, filter, and dry to obtain hollow microbeads loaded with paraffin;

[0020] The hollow microbeads loaded with paraffin are put into the coating machine, and the silicone resin slurry is sprayed by atomization.

It is coated on the surface of hollow microbeads loaded with paraffin wax and cured at 70-80°C for 30-40 minutes to obtain paraffin wax/hollow microbeads-silicone resin phase change microcapsules.

[0021] Preferably, the emulsifier is a compound of Tween-60 and sodium dodecylbenzene sulfonate in a mass ratio of 2:1.

[0022] Preferably, the aqueous emulsion is one or more of silicone-acrylic emulsion, pure acrylic emulsion, and vinegar-acrylic emulsion.

[0023] Preferably, the thermally conductive filler is a mixture of fibrous aluminum nitride, silicon carbide, and silicon nitride, and aluminum nitride, silicon carbide, and silicon nitride are mixed in a mass ratio of 3:2:1.

[0024] Preferably, the film-forming aid is dipropylene glycol butyl ether; the leveling agent is a silicon-containing leveling agent; the pH adjusting agent is triethanolamine.

[0025] Preferably, the present invention also provides a method for preparing the above-mentioned heat storage and temperature regulation water-based interior wall paint, which includes the following steps:

[0026] (1) Weigh deionized water in proportion and put it into the disperser, then add sodium lignosulfonate, leveling agent and pH regulator, and stir at 350rpm for 25min to obtain a mixed solution A;

[0027] Crush the thermally conductive filler, pass it through a 100-mesh sieve, add it to the mixed solution A, and raise it to 70° C., stir at 400 rpm

10min, get mixed slurry B for later use;

[0028] Take the aqueous emulsion and raise it to 85°C, stir at 500rpm for 20min, then add hydroxy acrylic resin and carboxyl polyester resin, and heat to 100°C, stir at 400rpm for 20min to obtain mixed slurry C for later use;

[0029] (4) Take the paraffin wax/hollow microbeads-silicone resin phase change microcapsules, put them into the mixed slurry C, stir at 450rpm for 30min, and then add the mixed slurry C, the temperature is adjusted to 80 °C, and at 550rpm Stir for 35 minutes, finally add the film-forming aid, and lower the temperature to 50°C, and stir at 350 rpm for 10 minutes to obtain the heat storage and temperature control internal wall water-based paint.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The heat storage and temperature regulating interior wall water-based paint of the present invention uses paraffin wax/hollow beads-silicone resin phase change microcapsules as the phase change material, which has the advantages of large phase change latent heat, high energy storage, and strong temperature regulation ability. It can ensure that the coating of the present invention has better heat storage and heat preservation performance. At the same time, the paraffin is filled in the pores of the hollow microbeads by using porous hollow microbeads, and the surface of the hollow microbeads is coated with silicone resin. To prevent the leakage of paraffin wax, and the silicone resin coating film has less elasticity, it can fix the volume change rate of paraffin wax within a certain range. This range can ensure that the paraffin wax phase change heat storage temperature adjustment is maximized, and at the same time It can also ensure that the coating will not affect the volume of the paraffin and cause the coating cracking problem;

[0032] (2) The pores in the hollow microbeads used in the present invention are interconnected, so that when the phase change material paraffin is solid-liquid conversion, it can flow and solidify in the pores of the activated carbon, reducing its impact on the silicone package. The impact of the coating film, thereby improving the heat storage and temperature regulation ability of the coating of the present invention;

[0033] (3) The hydroxy acrylic resin and the carboxyl polyester resin in the present invention can undergo a cross-linking reaction to form a three-dimensional network structure, which can convert paraffin/hollow beads-silicone resin phase change microcapsules and heat conduction The filler is wrapped in it, so that the phase change microcapsules and the thermally conductive filler are more closely combined, which is beneficial to the absorption and release of the heat of the coating, thereby improving the heat storage and temperature adjustment ability of the coating. At the same time, the formed network three-dimensional structure can make the present invention Each component of the coating is more compactly combined, thereby improving the crack resistance of the coating of the present invention;

[0034] (4) It can be better solved and the pores in the porous activated carbon are connected to each other, so that when the phase change material paraffin wax is solid-liquid conversion, it can flow and solidify in the pores of the activated carbon, reducing its impact on the package. Impact of membrane urea-formaldehyde resin;

[0035] The sodium lignosulfonate of the present invention has good electrostatic repulsion, which can make the paraffin wax/hollow microbeads-silicone resin phase change microcapsules uniformly dispersed in the coating system, thereby making the coating heat storage and temperature adjustment More uniformity, to prevent uneven heat storage and temperature adjustment of the coating, and improve the heat storage and temperature adjustment ability of the coating;

[0036] (6) The coating material silicone used in the present invention has thermal conductivity, which can transfer heat to the phase change material in the outside world.

The effective transfer between waxes ensures the timeliness and effectiveness of the phase change material paraffin wax to absorb and release heat. At the same time, the coating material silicone resin used has good compatibility with the components in the coating system. Evenly dispersed in the paint, thus ensuring the heat storage and heat preservation performance of the paint;

[0037] (7) The present invention coats a thermally conductive layer on the outside of the coated silicone resin, which can further improve the effective transfer of heat between the outside world and the phase change material paraffin. At the same time, because the thermally conductive layer has a small amount of degeneration, it can solve the problem of coating. The problem of coating cracking caused by the volume of paraffin wax.

Detailed ways

[0038] Hereinafter, the above-mentioned content of the present invention will be further described in detail through the form of embodiments, but it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments, and all technologies based on the above-mentioned content of the present invention are realized All belong to the scope of the present invention.

Example 1

[0040] The thermal storage and temperature-regulating interior wall water-based paint of this embodiment is characterized in that it is composed of the following components in parts by weight: Line start/hollow microbeads-20 parts of silicone resin phase change microcapsules; 45 parts of emulsion; 30 parts of hydroxy acryl-acid resin; 15 parts of base polyester resin; 5 parts of thermally conductive filler;

[0041] 1-3 parts of sodium lignosulfonate; 2.2 parts of film-forming aids; 0.5 parts of leveling agent; 0.2 parts of pH regulator; 60 parts of monohydrate;

[0042] Wherein, the paraffin/hollow microbeads-silicone resin phase change microcapsules use paraffin wax as the phase change material, hollow microbeads as the carrier of the paraffin wax, and silicone resin as the capsule of the phase change microcapsules wall.

[0043] Wherein, the outer surface of the paraffin/hollow microsphere-silicone resin phase change microcapsule is coated with a thermally conductive layer, and the thermally conductive layer is made of the following parts by weight of raw materials: 3 parts of epoxy acrylic resin, polyethylene wax 1 part, 0.5 part of nano alumina powder, 2 parts of carbon fiber, 1 part of isopropanol.

[0044] Wherein, the preparation method of the thermally conductive layer is: adding epoxy acrylic resin to isopropanol according to the formula amount, fully stirring to make it dissolve completely, then adding polyethylene wax, stirring evenly, and then adding nano-oxidation The aluminum powder, after fully stirring, ultrasonic 8min, and finally adding carbon fiber, stirring evenly, then the thermal conductive layer is obtained.

[0045] Wherein, the preparation method of the paraffin/hollow beads-silicone resin phase change microcapsules is:

[0046] (1) Place the hollow microbeads in an acetone solution, ultrasonically clean them for 10 minutes, filter them with deionized water, and then vacuum dry them for later use;

[0047] (2) Weigh a certain amount of paraffin and heat it to melt, add an emulsifier after the paraffin is completely melted, and use a high-speed emulsifier to emulsify the paraffin solution, and then place it in a three-necked flask for heating in a water bath at 60. . Keep the temperature for 20min, get

To paraffin emulsion;

[0048] (3) Weigh the silicone resin, and seal it under a nitrogen atmosphere with heating and stirring for 30 minutes at a heating temperature of 70° C. to obtain a silicone resin slurry;

[0049] (4) Add the paraffin emulsion prepared in step (2) dropwise to the hollow microbeads in step (1), stir while dripping, filter, and dry to obtain paraffin-loaded hollow microbeads;

[0050] Put the paraffin-loaded hollow microbeads into the coating machine, and coat the surface of the paraffin-loaded hollow microbeads with the silicone resin slurry by atomizing spraying, and place it in an environment of 70° C. for curing for 30 minutes , That is, paraffin wax/hollow beads silicone resin phase change microcapsules.

[0051] Wherein, the emulsifier is a compound of Tween-60 and sodium dodecylbenzene sulfonate in a mass ratio of 2:1.

[0052] Wherein, the aqueous emulsion is one or more of silicone-acrylic emulsion, pure acrylic emulsion, and vinegar-acrylic emulsion.

[0053] Wherein, the thermally conductive filler is a mixture of fibrous aluminum nitride, silicon carbide, and silicon nitride, and aluminum nitride, silicon carbide, and silicon nitride are mixed in a mass ratio of 3:2:1.

[0054] Wherein, the film-forming aid is dipropylene glycol butyric acid; the leveling agent is a silicon-containing leveling agent; the pH adjusting agent is triethanolamine.

[0055] Wherein, the present invention also provides a preparation method of the above-mentioned heat storage and temperature regulation internal wall water-based paint, which includes the following steps:

[0056] Weigh deionized water in proportion and put it into the disperser, then add sodium lignosulfonate, leveling agent and pH regulator, and stir at 350rpm for 25min to obtain a mixed solution A;

[0057] Crush the thermally conductive filler, pass a 100-mesh sieve, add it to the mixed solution A, and raise it to 70° C., stir at 400 rpm for 10 min, to obtain the mixed slurry B for later use;

[0058] (3) Take the aqueous emulsion and raise it to 85° C., stir at 500 rpm for 20 min, then add hydroxy acrylic resin and carboxyl polyester resin, and heat to 100° C., stir at 400 rpm for 20 min to obtain mixed slurry C for use;

[0059] Take paraffin/hollow beads-silicone resin phase change microcapsules, put them into the mixed slurry C, stir at 450 rpm for 30 minutes, then add the mixed slurry C, adjust the temperature to 80 °C, and stir at 550 rpm for 35 minutes , And finally add the film-forming aids, and lower the temperature to 50 °C, and stir at 350 rpm for 10 minutes, that is, heat storage and temperature control internal wall water-based paint.

Example 2

[0061] The thermal storage and temperature-regulating interior wall water-based paint of this embodiment is characterized in that it is composed of the following parts by weight: paraffin wax/hollow microspheres-silicone resin and variable microcapsules 35 parts; water-based emulsion 55 Parts; 40 parts of hydroxyacrylic acid resin; 20 parts of carboxyl polyester resin; 10 parts of thermally conductive filler;

[0062] 1.8 parts of sodium lignosulfonate; 3.0 parts of flamboyant aids; 1.5 parts of leveling agents; 0.6 parts of pH adjusters; 70 parts of deionized water;

[0063] Wherein, the paraffin/hollow microbeads-silicone resin phase change microcapsules use paraffin as the phase change material, hollow microbeads as the carrier for loading paraffin, and silicone resin as the capsule of the phase change microcapsules wall.

[0064] Wherein, the outer surface of the paraffin/hollow microsphere-silicone resin phase change microcapsule is coated with a thermally conductive layer, and the thermally conductive layer is made of the following parts by weight of raw materials: 5 parts of epoxy acrylic resin, polyethylene wax 2 parts, 1.5 parts of nano alumina powder, 4 parts of carbon fiber, 3 parts of isopropanol.

[0065] Wherein, the preparation method of the thermal conductive layer is: adding epoxy acrylic resin to isopropanol according to the formula amount, fully stirring to make it dissolve completely, then adding polyethylene wax, stirring evenly, and then adding nano oxide The aluminum powder is fully stirred and ultrasonicated for 8 minutes. Finally, carbon fiber is added and stirred evenly to obtain a thermal conductive layer.

[0066] Wherein, the preparation method of the paraffin/hollow beads-silicone resin phase change microcapsules is:

[0067] The hollow microbeads are placed in an acetone solution, washed with deionized water after ultrasonic cleaning for 10 minutes, and then vacuum dried for use;

[0068] (2) Weigh a certain amount of paraffin and heat it to melt, add an emulsifier after the paraffin is completely melted, and use a high-speed emulsifier to emulsify the paraffin solution, and then place it in a three-necked flask for heating in a water bath and at a temperature of 60°C Insulate for 20 minutes to obtain a paraffin emulsion;

[0069] Weigh the silicone resin, and seal it under a nitrogen atmosphere with heating and stirring for 30 minutes at a heating temperature of 70° C. to obtain a silicone resin slurry;

[0070] (4) Add the paraffin emulsion prepared in step (2) dropwise to the hollow microbeads in step (1), stir while dripping, filter, and dry to obtain hollow microbeads loaded with paraffin;

[0071] Put the paraffin-loaded hollow microbeads into the coating machine, and coat the surface of the paraffin-loaded hollow microbeads with the silicone resin slurry by atomization spraying, and place it at 80°C for curing for 40 minutes , That is, paraffin wax/hollow microbead silicone resin phase change microcapsules.

[0072] Wherein, the emulsifier is a compound of Tween-60 and sodium dodecylbenzene sulfonate in a mass ratio of 2:1.

[0073] Wherein, the aqueous emulsion is one or more of silicone-acrylic emulsion, pure acrylic emulsion, and vinegar-acrylic emulsion.

[0074] Wherein, the thermally conductive filler is a mixture of fibrous aluminum nitride, silicon carbide, and silicon nitride, and aluminum nitride, silicon carbide, and silicon nitride are mixed in a mass ratio of 3:2:1.

[0075] Wherein, the film-forming aid is dipropylene glycol butyl ether; the leveling agent is a silicon-containing leveling agent; the pH adjusting agent is triethanolamine.

[0076] Wherein, the present invention also provides a method for preparing the above-mentioned heat storage and temperature regulation internal wall water-based paint, which includes the following steps:

[0077] Weigh deionized water into the disperser in proportion, then add sodium lignosulfonate, leveling agent and pH regulator, and stir at 350rpm for 25min to obtain a mixed solution A;

[0078] Crush the thermally conductive filler, pass it through a 100-mesh sieve, add it to the mixed solution A, raise it to 70°C, and stir at 400 rpm

10min, get mixed slurry B for later use;

[0079] Take the aqueous emulsion and raise it to 85°C, stir at 500rpm for 20min, then add hydroxy acrylic resin and carboxyl polyester resin, and heat to 100°C, stir at 400rpm for 20min, to obtain mixed slurry C for later use;

[0080] (4) Take paraffin wax/hollow microbeads-silicone resin phase change microcapsules, put them into the mixed slurry C, stir at 450 rpm for 30 minutes, and then add the mixed slurry C, the temperature is adjusted to 80 °C, and at 550 rpm Stir for 35 minutes, finally add the film-forming aid, and lower the temperature to 50°C, and stir at 350 rpm for 10 minutes to obtain the heat storage and temperature control internal wall water-based paint.

Embodiment 3

[0082] The thermal storage and temperature-regulating interior wall water-based paint of this embodiment is characterized in that it is composed of the following components by weight:

Line start/hollow microbeads-28 parts of silicone resin phase change microcapsules;

50 parts of water-based emulsion; 35 parts of hydroxy acrylic resin; 18 parts of base polyester resin; thermally conductive filler 7.5 parts;

[0083] 1.5 parts of sodium lignosulfonate;

2.6 parts of film forming aids;

15 parts of leveling agent; 0.4 parts of pH adjuster; 65 parts of deionized water;

[0084] Wherein, the paraffin/hollow microbeads-silicone resin phase change microcapsules use paraffin as the phase change material, hollow microbeads as the carrier for loading paraffin, and silicone resin as the capsule of the phase change microcapsules wall.

[0085] Wherein, the outer surface of the paraffin/hollow microsphere-silicone resin phase change microcapsule is coated with a thermally conductive layer, and the thermally conductive layer is made of the following parts by weight of raw materials: 4 parts of epoxy acrylic resin, polyethylene wax 1.5 parts, 1 part of nano alumina powder, 3 parts of carbon fiber, 2 parts of isopropanol.

[0086] Wherein, the preparation method of the thermally conductive layer is: adding epoxy acrylic resin to isopropanol according to the formula amount, fully stirring to make it dissolve completely, then adding polyethylene wax, stirring evenly, and then adding nano-oxidation The aluminum powder, after fully stirring, ultrasonic 8min, and finally adding carbon fiber, stirring evenly, then the thermal conductive layer is obtained.

[0087] Wherein, the preparation method of the paraffin/hollow beads-silicone resin phase change microcapsules is:

[0088] Put the hollow microbeads in an acetone solution, ultrasonically clean for 10 minutes, filter and wash with deionized water, and then vacuum dry for use;

[0089] (2) Weigh a certain amount of paraffin and heat it to melt, add an emulsifier after the paraffin is completely melted, and use a high-speed emulsifier to emulsify the paraffin solution, and then place it in a three-necked flask for heating in a water bath at 60. . Keep the temperature for 20 minutes to obtain the paraffin emulsion;

[0090] Weigh the silicone resin, and seal and heat under a nitrogen atmosphere with stirring for 30 min, and the heating temperature is 70° C. to obtain a silicone resin slurry;

[0091] (4) Add the paraffin emulsion prepared in step (2) dropwise to the hollow microbeads in step (1), stir while dripping, filter, and dry to obtain paraffin-loaded hollow microbeads;

[0092] Put the paraffin-loaded hollow microbeads into the coating machine, and coat the surface of the paraffin-loaded hollow microbeads with the silicone resin slurry by atomizing spraying, and place it in an environment of 75° C. for curing for 35 minutes , That is, paraffin wax/hollow beads silicone resin phase change microcapsules.

[0093] Wherein, the emulsifier is a compound of Tween-60 and sodium dodecylbenzene sulfonate in a mass ratio of 2:1.

[0094] Wherein, the aqueous emulsion is one or more of silicone-acrylic emulsion, pure acrylic emulsion, and vinegar-acrylic emulsion.

[0095] Wherein, the thermally conductive filler is a mixture of fibrous aluminum nitride, silicon carbide, and silicon nitride, and aluminum nitride, silicon carbide, and silicon nitride are mixed in a mass ratio of 3:2:1.

[0096] Wherein, the film-forming aid is dipropylene glycol butyric acid; the leveling agent is a silicon-containing leveling agent; the pH adjusting agent is

CN 109929363 A Triethanolamine.

[0097] Wherein, the present invention also provides a preparation method of the above-mentioned heat storage and temperature regulation internal wall water-based paint, which includes the following steps:

[0098] Weigh deionized water in proportion and put it into the disperser, then add sodium lignosulfonate, leveling agent and pH regulator, and stir at 350rpm for 25min to obtain a mixed solution A;

[0099] Crush the thermally conductive filler, pass a 100-mesh sieve, add it to the mixed solution A, and raise it to 70°C, stir at 400rpm for 10min, to obtain the mixed slurry B for later use;

(3) Take the aqueous emulsion and raise it to 85°C, stir at 500rpm for 20min, then add hydroxy acrylic resin and carboxyl polyester resin, and heat to 100°C, stir at 400rpm for 20min, to obtain mixed slurry C for later use;

[0101] Take the paraffin/hollow microsphere-silicone resin phase change microcapsules, put them into the mixed slurry C, stir at 450rpm for 30min, then add the mixed slurry C, adjust the temperature to 80°C, and stir at 550rpm for 35min , And finally add the film-forming aids, and lower the temperature to 50 °C, and stir at 350 rpm for 10 minutes, that is, heat storage and temperature control internal wall water-based paint.

Example 4

[0103] The thermal storage and temperature-regulating interior wall water-based paint of this embodiment is characterized in that it is composed of the following components in parts by weight: paraffin wax/hollow microbeads-silicone resin and 24 parts of variable microcapsules;

[0104] 48 parts of aqueous emulsion: 33 parts of hydroxy acrylic resin; 16 parts of carbon-based polyester resin; 6 parts of thermally conductive filler; 4 parts of sodium lignosulfonate;

[0105] Film-forming aids 2.4 parts;

0.8 parts of leveling agent;

ΡΠ regulator 0.3 parts; deionized water 63 parts;

[0106] Wherein, the paraffin/hollow microbeads-silicone resin phase change microcapsules use paraffin as the phase change material, hollow microbeads as the carrier for loading paraffin, and silicone resin as the capsule of the phase change microcapsules wall.

[0107] Wherein, the outer surface of the paraffin wax/hollow beads-silicone resin phase change microcapsules is coated with a thermally conductive layer, and the thermally conductive layer is made of the following parts by weight of raw materials: 3.5 parts of epoxy acrylic resin, polyethylene wax 1.5 parts, 1 part of nano alumina powder, 3 parts of carbon fiber, 2 parts of isopropanol.

[0108] Wherein, the preparation method of the thermally conductive layer is as follows: add epoxy acrylic resin to isopropanol according to the formula amount, fully stir to make it dissolve completely, then add polyethylene wax, stir evenly, and then add nano oxide The aluminum powder, after fully stirring, ultrasonic 8min, and finally adding carbon fiber, stirring evenly, then the thermal conductive layer is obtained.

[0109] Wherein, the preparation method of the paraffin/hollow beads-silicone resin phase change microcapsules is:

[0110] Put the hollow microbeads in an acetone solution, ultrasonically clean for 10 minutes, filter and wash with deionized water, and then vacuum dry for use;

[0111] Weigh a certain amount of paraffin and heat it to melt, add emulsifier after the paraffin is completely melted, and use a high-speed emulsifier to emulsify the paraffin solution, and then place it in a three-necked flask for heating in a water bath at a temperature of 60°C. . Keep the temperature for 20min, get

To paraffin emulsion;

[0112] (3) Weigh the silicone resin, and seal it under a nitrogen atmosphere with heating and stirring for 30 minutes at a heating temperature of 70° C. to obtain a silicone resin slurry;

[0113] Add the paraffin emulsion prepared in step dropwise to the hollow microbeads in step , stir while dripping, filter, and dry to obtain paraffin-loaded hollow microbeads;

[0114] Put the paraffin-loaded hollow microbeads into the coating machine, and coat the surface of the paraffin-loaded hollow microbeads with the silicone resin slurry by atomization spraying, and place it in an environment of 72° C. for curing for 33 minutes , That is, paraffin wax/hollow beads silicone resin phase change microcapsules.

[0115] Wherein, the emulsifier is a compound of Tween-60 and sodium dodecylbenzene sulfonate in a mass ratio of 2:1.

[0116] Wherein, the aqueous emulsion is one or more of silicone-acrylic emulsion, pure acrylic emulsion, and vinegar-acrylic emulsion.

[0117] Wherein, the thermally conductive filler is a mixture of fibrous aluminum nitride, silicon carbide, and silicon nitride, and aluminum nitride, silicon carbide, and silicon nitride are mixed in a mass ratio of 3:2:1.

[0118] Wherein, the film forming aid is dipropylene glycol butyric acid; the leveling agent is a silicon-containing leveling agent; and the pH adjusting agent is triethanolamine.

[0119] Among them, the present invention also provides a method for preparing the above-mentioned heat storage and temperature regulation water-based interior wall paint, which includes the following steps:

[0120] (1) Weigh deionized water in proportion and put it into the disperser, then add sodium lignosulfonate, leveling agent and pH regulator, and stir at 350 rpm for 25 min to obtain a mixed solution A;

[0121] Crush the thermally conductive filler, pass it through a 100-mesh sieve, add it to the mixed solution A, and raise it to 70°C, stir at 400rpm for 10min, to obtain the mixed slurry B for later use;

[0122] (3) Take the aqueous emulsion and raise it to 85°C, stir at 500rpm for 20min, then add hydroxy acrylic resin and carboxyl polyester resin, and heat to 100°C, stir at 400rpm for 20min, to obtain mixed slurry C for standby;

[0123] Take paraffin wax/hollow microbeads-silicone resin phase change microcapsules, put them into the mixed slurry C, stir at 450 rpm for 30 minutes, then add the mixed slurry C, adjust the temperature to 80 °C, and stir at 550 rpm for 35 minutes , And finally add the film-forming assistant, and reduce the temperature to 50 °C, and stir at 350 rpm for 10 minutes, that is, the heat storage and temperature control internal wall water-based paint.

Example 5

[0125] The thermal storage and temperature-regulating interior wall water-based paint of this embodiment is characterized in that it is composed of the following components in parts by weight: paraffin wax/hollow microbeads-silicone resin and 30 parts of variable microcapsules; water-based emulsion 52 Parts; 38 parts of hydroxy acrylic resin; 18 parts of carbon-based polyester resin; 9 parts of thermally conductive filler;

[0126] 1.7 parts of sodium lignosulfonate;

2.8 parts of film-forming aids;

1.2 parts of leveling agent;

0.5 parts of pH regulator; 68 parts of deionized water;

[0127] Wherein, the paraffin/hollow microbeads-silicone resin phase change microcapsules use paraffin as the phase change material, hollow microbeads as the carrier for the paraffin wax, and silicone resin as the capsule of the phase change microcapsules. wall.

[0128] Wherein, the outer surface of the paraffin wax/hollow microbeads-silicone resin phase change microcapsules is coated with a thermally conductive layer, and the thermally conductive layer is made of the following parts by weight of raw materials: 3.5 parts of epoxy acrylic resin, polyethylene wax 1.2 parts, 0.8 parts of nano alumina powder, 2.5 parts of carbon fiber, 1.5 parts of isopropanol.

[0129] Wherein, the preparation method of the thermal conductive layer is as follows: add epoxy acrylic resin to isopropanol according to the formula amount, stir fully to dissolve it completely, then add polyethylene wax, stir evenly, and then add nano oxide The aluminum powder is fully stirred and ultrasonicated for 8 minutes. Finally, carbon fiber is added and stirred evenly to obtain a thermal conductive layer.

[0130] Wherein, the preparation method of the paraffin/hollow beads-silicone resin phase change microcapsules is:

[0131] (1) Place the hollow microbeads in an acetone solution, ultrasonically clean for 10 minutes, filter and wash with deionized water, and then vacuum dry for use;

[0132] Weigh a certain amount of paraffin and heat it to melt, add emulsifier after the paraffin is completely melted, and emulsify the paraffin solution with a high-speed emulsifier, then place it in a three-necked flask for heating in a water bath, and keep it at 60°C for 20 min , Get paraffin emulsion;

[0133] (3) Weigh the silicone resin, and seal it under a nitrogen atmosphere with heating and stirring for 30 min at a heating temperature of 70° C. to obtain a silicone resin slurry;

[0134] (4) Add the paraffin emulsion prepared in step (2) dropwise to the hollow microbeads in step (1), stir while dripping, filter, and dry to obtain paraffin-loaded hollow microbeads;

[0135] Put the paraffin-loaded hollow microbeads into the coating machine, and coat the surface of the paraffin-loaded hollow microbeads with the silicone resin slurry by atomizing spraying, and place it in an environment of 78° C. for curing for 38 minutes , That is, paraffin wax/hollow microbead silicone resin phase change microcapsules.

[0136] Wherein, the emulsifier is a compound of Tween-60 and sodium dodecylbenzene sulfonate in a mass ratio of 2:1.

[0137] Wherein, the aqueous emulsion is one or more of silicone-acrylic emulsion, pure acrylic emulsion, and vinegar-acrylic emulsion.

[0138] Wherein, the thermally conductive filler is a mixture of fibrous aluminum nitride, silicon carbide, and silicon nitride, and aluminum nitride, silicon carbide, and silicon nitride are mixed in a mass ratio of 3:2:1.

[0139] Wherein, the film-forming aid is dipropylene glycol butyl ether; the leveling agent is a silicon-containing leveling agent; the pH adjusting agent is triethanolamine.

[0140] Wherein, the present invention also provides a preparation method of the above-mentioned heat storage and temperature regulation internal wall water-based paint, which includes the following steps:

[0141] Weigh deionized water into the disperser in proportion, then add sodium lignosulfonate, leveling agent and pH regulator, and stir at 350rpm for 25min to obtain mixed solution A;

[0142] Crush the thermally conductive filler, pass a 100-mesh sieve, add it to the mixed solution A, and raise it to 70°C, stir at 400rpm for 10min, to obtain the mixed slurry B for later use;

[0143] Take the aqueous emulsion and raise it to 85°C, stir at 500rpm for 20min, then add hydroxy acrylic resin and carboxyl polyester resin, and heat to 100°C, stir at 400rpm for 20min, to obtain mixed slurry C for later use;

[0144] (4) Take paraffin wax/hollow beads-silicone resin phase change microcapsules, put them into the mixed slurry C, stir at 450 rpm for 30 minutes, and then add the mixed slurry C, adjust the temperature to 80° C., and set the temperature at 550 rpm Stir for 35 minutes, finally add the film-forming aid, and lower the temperature to 50°C, and stir at 350 rpm for 10 minutes to obtain the heat storage and temperature control internal wall water-based paint.

[0145] Comparative Example 1

[0146] Except that the silicone resin coating material is omitted, the other components and contents are the same as in Example 1.

[0147] Comparative Example 2

[0148] Except for omitting the hydroxy acrylic resin, the other components and contents are the same as in Example 1.

[0149] Comparative Example 3

[0150] Except for omitting the base polyester resin, other components and contents are the same as in Example 1.

[0151] Comparative Example 4

[0152] Except that sodium lignosulfonate is omitted, other components and contents are the same as in Example 1.

[0153] Test Example 1

[0154] The heat-storage and temperature-regulating interior wall water-based paint prepared in Example 1 of the present invention was tested in accordance with the GBT/T 9756-2009 national standard, and the specific experimental data are shown in Table 1.

[0155] Table 1

[0156]

<td>project</td><td>unit</td><td>index</td><td>Example 1</td><td>Example 2</td><td>Example 3</td><td>Example 4</td><td>Example 5</td>

<td>State in the container</td><td>/</td><td>No lumps, uniform after mixing</td><td>Meet the requirements</td><td>Meet the requirements</td><td>Meet the requirements</td><td>Meet the requirements</td><td>Meet the requirements</td>

<td>Constructability</td><td>/</td><td>No barrier-free painting</td><td>Meet the requirements</td><td>Meet the requirements</td><td>Meet the requirements</td><td>Meet the requirements</td><td>Meet the requirements</td>

<td>Drying time (surface dry)</td><td>11</td><td>W2</td><td>1. 6</td><td>1. 4</td><td>1. 3</td><td>1. 5</td><td>1.6</td>

<td>Appearance</td><td>/</td><td>normal</td><td>normal</td><td>normal</td><td>normal</td><td>normal</td><td>normal</td>

<td>Alkali resistance (25h)</td><td>/</td><td>No abnormality</td><td>No abnormality</td><td>No abnormality</td><td>No abnormality</td><td>No abnormality</td><td>No abnormality</td>

<td>Scrub resistance</td><td>Times</td><td>2300</td><td>2200</td><td>2250</td><td>2350</td><td>2250</td><td>2300</td>

<td>Low temperature stability</td><td>/</td><td>Not degenerate</td><td>Not degenerate</td><td>Not degenerate</td><td>Not degenerate</td><td>Not degenerate</td><td>Not degenerate</td>

<td>Initial drying and cracking (3h)</td><td>/</td><td>no</td><td>no</td><td>no</td><td>no</td><td>no</td><td>no</td>

[0157] It can be seen from Table 1 that the heat storage and temperature-regulating interior wall water-based paint prepared in each embodiment of the present invention has a short drying time, and has good alkali resistance, scrubbing resistance and low temperature storage stability, and has good The anti-cracking performance.

[0158] Test Example 2

[0159] The heat storage and temperature control internal wall water-based paint prepared in Example 1-5 of the present invention and the heat storage and temperature control internal wall water-based paint prepared in Comparative Example 5 were tested for phase change flame and thermal insulation performance, wherein

[0160] Phase change flame measurement: use a differential scanning calorimeter (DSC) to test the phase change flame of the sample, and the test conditions are: accurately weigh about 10 mg of the sample, and select the temperature rise and fall rate of 10K/min under N2 atmosphere, The test temperature selects the measurement range of -20°C-100°C.

[0161] Thermal insulation performance test: 1. Scrape the sample paint on the tinplate, dry it in an oven at 50°C, restore it to room temperature, and paste a contact thermometer on the sample film; 2. Adjust the thermal conductivity The excellent thin aluminum plate is placed above a stable heat source of 65C; 3. After the temperature of the thin aluminum plate is stable, place the tested sample plate in the center of the thin aluminum plate, and press the stopwatch to record the temperature rise

rate. Compared with the original formula (without phase change microcapsules), the maximum temperature difference at the same time is used to indicate the thermal insulation performance.

[0162] The specific experimental data are shown in Table 2.

[0163]

<td>Test items</td><td>Enthalpy of phase change (J/g)</td><td>Thermal insulation performance (°C)</td>

<td>Example 1</td><td>133.8</td><td>12</td>

<td>Example 2</td><td>135.5</td><td>14</td>

<td>Example 3</td><td>137.8</td><td>15</td>

<td>Example 4</td><td>135.9</td><td>13</td>

<td>Example 5</td><td>136.4</td><td>14</td>

<td>Comparative example 1</td><td>104.3</td><td>9</td>

<td>Comparative example 2</td><td>115.2</td><td>10</td>

<td>Comparative example 3</td><td>118.3</td><td>10</td>

<td>Comparative example 4</td><td>126.8</td><td>11</td>

[0164] It can be seen from Table 2 that the phase change enthalpy and thermal insulation performance of the water-based heat storage and temperature-regulating interior wall paint of the present invention are higher than those of Comparative Examples 1-4, thus illustrating the heat-storage and temperature-regulating interior wall water-based paint of the present invention It has excellent heat insulation performance and heat storage and temperature adjustment ability. It can be seen from Comparative Examples 1-5 that after the silicone resin coating material is omitted, the phase change material leaks, which affects the heat storage and heat preservation effect of the coating. After removing the hydroxy acrylic resin or the base polyester resin, the cross-linking reaction cannot occur, forming a network-like three-dimensional structure in the coating system, and the phase change microcapsules and the thermally conductive filler cannot be tightly closed, which reduces the heat storage adjustment of the coating. Temperature ability, and after adding sodium lignosulfonate, the paraffin/hollow microspheres-silicone resin phase change microcapsules cannot be uniformly dispersed in the coating system, and the paraffin/hollow microbeads-silicone resin phase change microcapsules will appear. The phenomenon of capsule agglomeration affects the heat storage and temperature adjustment effect of the coating.

[0165] In summary, the present invention provides a heat storage and temperature control water-based paint for interior walls, which solves the problem of easy cracking of the heat storage and temperature control coatings in the past, and ensures the stability of the heat storage and temperature control of the coating, and the coating of the present invention has the same characteristics. It has the advantages of large latent heat, high energy storage, and strong heat preservation ability. At the same time, the use of phase change microcapsules has good volume stability, is not easy to leak, and has strong temperature adjustment capabilities.

[0166] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still comment on the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.