阅读说明：本技术 一种混凝土罐车用反光隔热涂料、其制备方法及使用方法 (Reflective heat-insulating coating for concrete tank truck, and preparation method and application method thereof ) 是由 杨骏 周石喜 王平豪 刘锐 钟振源 徐利洪 聂慧 于 2020-07-16 设计创作，主要内容包括：本发明涉及混凝土隔热领域,更具体地说,它涉及一种混凝土罐车用反光隔热涂料、其制备方法及使用方法。本发明的混凝土罐车用反光隔热涂料,由以下质量份数的各组分组成：空间聚合物乳液、氮化硼、二氧化钛、超细铝箔、纳米玻璃空心微珠、固化剂、防霉防藻剂和水；本发明混凝土罐车用反光隔热涂料的制备方法包括树脂的混合、反光隔热物质的添加、助剂和水的添加这些步骤；本发明混凝土罐车用反光隔热涂料的使用方法,包括待刷物体前期处理、罐体表面涂覆和固化三个步骤。本发明的混凝土罐车用反光隔热涂料对光的热反射比较高,红外线热反射率可以达到90%以上。(The invention relates to the field of concrete heat insulation, in particular to a reflective heat insulation coating for a concrete tank truck, a preparation method and a use method thereof. The invention relates to a reflective heat-insulating coating for a concrete tank truck, which comprises the following components in parts by weight: the coating comprises a space polymer emulsion, boron nitride, titanium dioxide, superfine aluminum foil, nano glass hollow microspheres, a curing agent, a mildew-proof and algae-proof agent and water; the preparation method of the reflective heat-insulating coating for the concrete tank car comprises the steps of mixing resin, adding a reflective heat-insulating substance, and adding an auxiliary agent and water; the application method of the reflective heat-insulating coating for the concrete tank truck comprises the three steps of pretreatment of an object to be brushed, coating on the surface of the tank body and curing. The reflective heat-insulating coating for the concrete tank car has high light heat reflection rate, and the infrared heat reflection rate can reach more than 90%.)

1. The reflective heat-insulating coating for the concrete tank car is characterized by comprising the following components in parts by mass:

50-80 parts of space polymer emulsion;

3-4 parts of boron nitride;

5-6 parts of titanium dioxide;

1-2 parts of superfine aluminum foil;

3-5 parts of nano glass hollow microspheres;

1-2 parts of a curing agent;

1-2 parts of a mildew-proof algaecide;

20-50 parts of water;

wherein the space polymer emulsion is prepared by mixing silicone-acrylic resin and pure acrylic resin according to the mass ratio of 3: 1.

2. The reflective thermal insulation coating for the concrete tank car as claimed in claim 1, wherein: the boron nitride is selected from one of hexagonal boron nitride and rhombohedral boron nitride.

3. The reflective thermal insulation coating for the concrete tank car as claimed in claim 1, wherein: the titanium dioxide is rutile titanium dioxide, and the particle size is 20-50 nm.

4. The reflective thermal insulation coating for the concrete tank car as claimed in claim 1, wherein: the ultrafine aluminum foil is obtained by crushing a common commercial aluminum foil by using an ultrafine crusher, and the crushing fineness is 200-600 meshes.

5. The reflective thermal insulation coating for the concrete tank car as claimed in claim 1, wherein: the particle size of the nano glass hollow micro-beads is between 20 and 40 mu m, and the bulk density of the nano glass hollow micro-beads is 120kg/m³。

6. The reflective thermal insulation coating for the concrete tank car as claimed in claim 1, wherein: the curing agent is OP-8011/X.

7. The reflective thermal insulation coating for the concrete tank car as claimed in claim 1, wherein: the mildew-proof algaecide is 1, 2-benzisothiazole-3-ketone.

8. The preparation method of the reflective thermal insulation coating for the concrete tank car as claimed in any one of claims 1 to 7, characterized by comprising the following steps:

step 1, putting the silicone-acrylic resin and the pure acrylic resin into a stirring kettle according to the proportion of 3:1, and stirring for 5-10min under the condition of 200-300 r/min;

step 2, sequentially putting boron nitride, titanium dioxide, superfine aluminum foil and nano glass hollow microspheres into a stirring kettle, uniformly stirring under the condition of 800-1200r/min, putting the next material at intervals of 2-3min after the previous material is put into the stirring kettle, and continuously stirring for 5-8min after all the materials are added;

and 3, adjusting the rotating speed of the stirring kettle to 200-300r/min, simultaneously adding a curing agent and a mildew-proof and algae-proof agent into the stirring kettle, stirring for 2-3min, adding water into the stirring kettle, stirring for 5-10min, and sealing and storing into a storage barrel to obtain the reflective heat-insulating coating for the concrete tank car.

9. The use method of the reflective thermal insulation coating for the concrete tank car as claimed in any one of claims 1 to 7, wherein: the method comprises the following steps:

step 1, pre-treatment of an object to be brushed: cleaning the surface of the tank body of the concrete tank truck to ensure that the surface does not contain rust, oil stain, dust, fragments and other objects, and drying the cleaned surface until no water beads are left on the surface of the tank body of the concrete tank truck;

step 2, coating the surface of the tank body: the coating mode can adopt the modes of brushing, rolling, smearing and spraying, the coating is carried out for 2-3 times, the coating thickness is 1-2mm each time, and the interval of the coating process is 25-30min each time;

step 3, curing: the curing mode comprises a natural curing mode and a heating curing mode, wherein the natural curing condition comprises a temperature condition and a humidity condition, the humidity condition refers to that the relative humidity of air is less than 58%, the temperature condition refers to that the ambient temperature is more than 12 ℃, the natural curing is preferentially adopted under the condition of meeting the natural curing condition, the natural curing time is 1.5-3h, when any one of the temperature condition and the humidity condition does not meet the natural curing condition, the heating curing mode is adopted, the heating curing temperature is 45-55 ℃, and the curing time is 1-2 h.

Technical Field

The invention relates to the field of concrete heat insulation, in particular to a reflective heat insulation coating for a concrete tank truck, a preparation method and a use method thereof.

Background

After the ready-mixed concrete is discharged from the tank, the ready-mixed concrete generally needs to be transported by a concrete tanker, the transportation and waiting time for unloading usually needs to be from half an hour to one hour, and the time is longer when traffic jam occurs. Under the sunshine condition, the temperature of the premixed concrete in the tank is greatly increased, and particularly in summer, the sun temperature rise can reach 5-10 ℃. The negative influence of temperature rise on the formation of waterproof concrete is great, and particularly, the large-volume concrete is easy to crack and leak.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the reflective heat-insulating coating for the concrete tank car, which has a good reflective heat-insulating effect, has enough tank body adhesive force of the concrete tank car and can not be peeled off after being used for a long time.

The invention aims to realize the purpose through the following technical scheme, and the reflective heat-insulating coating for the concrete tank car comprises the following components in parts by mass:

50-80 parts of space polymer emulsion;

3-4 parts of boron nitride;

5-6 parts of titanium dioxide;

1-2 parts of superfine aluminum foil;

3-5 parts of nano glass hollow microspheres;

1-2 parts of a curing agent;

1-2 parts of a mildew-proof algaecide;

20-50 parts of water;

wherein the space polymer emulsion is prepared by mixing silicone-acrylic resin and pure acrylic resin according to the mass ratio of 3: 1.

By adopting the technical scheme, the boron nitride, titanium dioxide and superfine aluminum foil have high light heat reflection rate, the substances are spherical or rhombic, the shapes have good reflection effect on light infrared rays, the infrared ray heat reflection rate can reach 90%, most of solar radiation heat can be reflected to the air, the heat remained on the heat insulation coating can be absorbed by the coating film and the nano glass hollow microspheres, the heat conduction to the interior of the tank body of the concrete tank truck is reduced, and the silicone-acrylic resin and the pure acrylic resin are compounded, so that the binding power between the finally formed coating film and the tank body of the concrete tank truck can be improved.

Preferably, the boron nitride is one of hexagonal boron nitride and rhombohedral boron nitride.

By adopting the technical scheme, the boron nitride of some kinds is beneficial to improving the reflectivity of infrared rays.

Preferably, the titanium dioxide is rutile titanium dioxide, and the particle size is 20-50 nm.

By adopting the technical scheme, the rutile type titanium dioxide has certain infrared ray reflecting capacity, and simultaneously has stronger ultraviolet resistance and can reflect ultraviolet light to a greater extent.

Preferably, the ultrafine aluminum foil is obtained by crushing a common commercial aluminum foil by using an ultrafine crusher, and the crushing fineness is 200-600 meshes.

By adopting the technical scheme, the superfine aluminum foil has a good reflection effect on light rays of each wavelength band.

Preferably, the particle size of the nano glass hollow microsphereThe bulk density of the nano glass hollow micro-beads is between 20 and 40 mu m, and is selected from 120kg/m³。

By adopting the technical scheme, the particle size is between 20 and 40 mu m, and the bulk density is 120kg/m³The nano glass hollow micro-beads absorb more heat, and are preferable nano glass hollow micro-beads.

Preferably, the curing agent is OP-8011/X.

By adopting the technical scheme, the OP-8011/X is more suitable for curing pure acrylic resin, and the coating can obtain lower film forming temperature.

Preferably, the mildew-proof algaecide is 1, 2-benzisothiazole-3-ketone.

By adopting the technical scheme, the 1, 2-benzisothiazole-3-ketone has a wide antibacterial spectrum, and can effectively prevent the coating from growing mildews and algae for a long time.

The second purpose of the invention is to provide a preparation method of the reflective heat-insulation coating for the concrete tank car, when the prepared coating is coated on the reflective coating for the concrete tank car, the coating can provide a better reflective heat-insulation effect for the concrete tank car, and the preparation method comprises the following steps:

step 1, putting the silicone-acrylic resin and the pure acrylic resin into a stirring kettle according to the proportion of 3:1, and stirring for 5-10min under the condition of 200-300 r/min;

step 2, sequentially putting boron nitride, titanium dioxide, superfine aluminum foil and nano glass hollow microspheres into a stirring kettle, uniformly stirring under the condition of 800-1200r/min, putting the next material at intervals of 2-3min after the previous material is put into the stirring kettle, and continuously stirring for 5-8min after all the materials are added;

and 3, adjusting the rotating speed of the stirring kettle to 200-300r/min, simultaneously adding a curing agent and a mildew-proof and algae-proof agent into the stirring kettle, stirring for 2-3min, adding water into the stirring kettle, stirring for 5-10min, and sealing and storing into a storage barrel to obtain the reflective heat-insulating coating for the concrete tank car.

By adopting the technical scheme, the components of the silicone-acrylic resin and the pure acrylic resin are relatively similar, and the silicone-acrylic resin and the pure acrylic resin can be uniformly stirred only under the condition of 200 plus materials at 300r/min, the substances such as boron nitride, titanium dioxide, superfine aluminum foil and nano glass hollow microspheres can be dispersed in the resin only under the condition of high rotation speed of 800 plus materials at 1200r/min, and the stirring at high rotation speed is not needed in the process of adding the curing agent, the mildew-proof algaecide and the water, and the stirring is uniform under the condition of 200 plus materials at 300 r/min.

The invention also aims to provide a method for using the reflective heat-insulating coating for the concrete tank car, wherein the coating film formed by coating by the method has strong adhesive force with the tank body of the concrete tank car and does not generate bubbles, and the method comprises the following steps:

step 1, pre-treatment of an object to be brushed: cleaning the surface of the tank body of the concrete tank truck to ensure that the surface does not contain rust, oil stain, dust, fragments and other objects, and drying the cleaned surface until no water beads are left on the surface of the tank body of the concrete tank truck;

step 2, coating the surface of the tank body: the coating mode can adopt the modes of brushing, rolling, smearing and spraying, the coating is carried out for 2-3 times, the coating thickness is 1-2mm each time, and the interval of the coating process is 25-30min each time;

step 3, curing: the curing mode comprises a natural curing mode and a heating curing mode, wherein the natural curing condition comprises a temperature condition and a humidity condition, the humidity condition refers to that the relative humidity of air is less than 58%, the temperature condition refers to that the ambient temperature is more than 12 ℃, the natural curing is preferentially adopted under the condition of meeting the natural curing condition, the natural curing time is 1.5-3h, when any one of the temperature condition and the humidity condition does not meet the natural curing condition, the heating curing mode is adopted, the heating curing temperature is 45-55 ℃, and the curing time is 1-2 h.

By adopting the technical scheme, the object to be brushed is subjected to pretreatment, the bonding force between the surface of the tank body of the concrete tank car and the coating film can be improved, the overall reflective and heat-insulating effect of the coating film can be improved by coating for 2-3 times, the time interval of each coating is not too short, the coating hardness is not enough due to too short time, and the construction time is prolonged due to too long time interval of each coating. The curing mode can be selected by different environmental conditions, and the best construction effect is achieved.

In summary, the invention includes at least one of the following beneficial technical effects:

firstly, the heat reflection of light is high, particularly, the light and infrared rays are well reflected, and the heat reflection rate of the infrared rays can reach more than 90%;

secondly, the preparation method is simple and convenient, and the coating with good heat insulation and light reflection effects can be well prepared;

thirdly, by adopting the coating method provided by the invention, the bonding force between the coating finally formed by the coating and the surface of the tank body of the concrete tank car is strong;

fourthly, the technical scheme provided by the invention reduces the temperature rise generated in the transportation process: the cost is increased by about 0.2 yuan when the temperature is reduced by 1 ℃ according to the transportation and blanking waiting time of 30-60 minutes during the sun drying period; china still has a large space in capital investment at present. The application market of the innovative technology is wide. For example, the waterproof concrete for underground stations and sections of subways is mass concrete, and the temperature of entering a mold needs to be reduced. One standard station is about 2 ten thousand m3 waterproof concrete, and concrete poured during sunshine is about 4000m³By adopting the invention, a large amount of cooling cost can be saved. The civil engineering of basement of high-rise building, underground engineering, traffic engineering, municipal engineering and the like relates to billions of meters of mass concrete every year³The invention can be used, thereby saving a large amount of cooling cost and obtaining good social benefit and economic benefit.

Detailed Description

The present invention will be described in detail with reference to examples.

The sources of the materials mentioned in the invention are as follows: