阅读说明：本技术 保温墙体结构 (Heat-insulating wall structure ) 是由 高德谦 于 2020-12-04 设计创作，主要内容包括：本发明提供了一种保温墙体结构,包括混凝土框架,以及垒砌于混凝土框架中的泡沫保温模块。保温墙体结构中的各个泡沫保温模块收尾相连拼接以构成墙体,且于墙体的表面喷涂有聚脲涂料。本发明的保温墙体结构,可提高泡沫保温墙体的墙体强度及其保温性能。(The invention provides a heat-insulating wall structure which comprises a concrete frame and a foam heat-insulating module built in the concrete frame. All foam heat-insulating modules in the heat-insulating wall structure are spliced in an end-to-end manner to form a wall, and polyurea coating is sprayed on the surface of the wall. The heat-insulating wall structure can improve the wall strength and the heat-insulating property of the foam heat-insulating wall.)

1. The utility model provides a thermal insulation wall structure, includes concrete frame (1) to and build in foam heat preservation module (5) in concrete frame (1), its characterized in that: and all the foam heat-insulation modules (5) in the heat-insulation wall structure are spliced in an end-to-end manner to form a wall body, and polyurea coating is sprayed on the surface of the wall body.

2. An insulated wall structure according to claim 1, characterized in that: the foam heat-insulation module (5) is cuboid, splicing blocks (501) and splicing grooves (502) are respectively constructed at two ends of the foam heat-insulation module (5), and the adjacent foam heat-insulation modules (5) are spliced and connected through the splicing blocks (501) and the splicing grooves (502).

3. An insulated wall structure according to claim 2, characterized in that: the splicing grooves (502) are dovetail grooves arranged along the height direction of the foam heat-insulation module (5), and the splicing blocks (501) are matched with the splicing grooves (502).

4. A thermal insulating wall structure according to claim 3, wherein: splice groove (502) link up foam insulation module (5) sets up, and has the concatenation portion (5020) and the muscle portion of wearing (5021) of intercommunication, splice piece (501) cartridge in concatenation portion (5020), wear muscle portion (5021) to be located concatenation portion (5020) with between the bottom surface of splice groove (502) to supply wall body reinforcing bar (4) to run through.

5. An insulated wall structure according to claim 1, characterized in that: foam heat preservation module (5) adopt EPS or XPS to make, and in foam heat preservation module (5) go up the shaping has hollow die cavity (500).

6. An insulated wall structure according to claim 2, characterized in that: the cavities (500) are arranged in a penetrating manner along the height direction of the foam heat-insulation module (5).

7. An insulated wall structure according to any of claims 1-6, characterized in that: the polyurea coating is a graphene polyurea protective coating, and the graphene polyurea protective coating comprises a component A and a component B;

the volume ratio of the component A to the component B is 1: 0.8-1.2;

the component A is an aromatic isocyanate prepolymer;

the component B comprises the following components in parts by weight:

550 parts of amino-terminated polyether, 500 parts of amino chain extender, 0.05-5 parts of graphene, 0.05-25 parts of dispersing agent, 0.05-50 parts of anti-settling agent, 0.05-25 parts of defoaming agent and 10-50 parts of color paste.

8. An insulated wall structure according to claim 7, characterized in that: the component A comprises one or more of Wanate8311, Wanate8312 and Wanate8319 of the Tantawanghua polyurethane company Limited, and Suprasec2008, Suprasec9480 and Suprasec2067 of the Huntsman company.

9. An insulated wall structure according to claim 8, characterized in that: firstly, mixing the amino-terminated polyether and the amino chain extender, then adding the dispersant, the defoamer and the anti-settling agent for stirring, then adding the graphene for grinding, finally adding the color paste for stirring, and then filtering to obtain the component B.

10. A thermal insulating wall structure according to claim 9, wherein: the spraying thickness of the graphene polyurea protective coating is 0.5-3 mm.

Technical Field

The invention relates to the technical field of building materials, in particular to a heat-insulating wall structure.

Background

Along with the progress of building technology, the demand of building materials is increased year by year, and among various building materials, polystyrene foam heat-insulating wall structures are concerned by people because of light weight, good heat-insulating performance and rapid building construction.

EPS Polystyrene foam (Expanded Polystyrene is EPS for short) is used as a light high polymer, and is foamed plastic with a hard closed-cell structure, which is formed by adding a foaming agent into Polystyrene resin, heating for softening, and generating gas. Therefore, the EPS module is widely applied to the field of construction as an ideal building material, and the processing of EPS into the EPS module for building construction is a rural self-building mode which is greatly popularized by the national Ministry of construction.

In the prior art, the traditional building structure wall body has poor heat insulation performance, heavy weight and slow construction, and the foam heat insulation wall body structure is adopted, so that the problems of insufficient overall strength of the wall body and heat insulation effect to be improved exist due to poor connectivity and sealing performance among heat insulation modules.

Disclosure of Invention

In view of the above, the present invention is directed to a thermal insulation wall structure, so as to improve the wall strength and thermal insulation performance of a foam thermal insulation wall.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a thermal insulation wall structure, includes the concrete frame to and build in foam insulation module in the concrete frame, each in the thermal insulation wall structure foam insulation module links to each other the concatenation in order to constitute the wall body in the ending, and in the surface spraying of wall body has polyurea coating.

Furthermore, the foam heat-insulation modules are cuboid, splicing blocks and splicing grooves are respectively constructed at two ends of each foam heat-insulation module, and the adjacent foam heat-insulation modules are spliced and connected through the splicing blocks and the splicing grooves.

Furthermore, the splicing groove is a dovetail groove arranged along the height direction of the foam heat-insulation module, and the splicing blocks are matched with the splicing groove.

Furthermore, the splicing grooves are communicated with the foam heat-insulation modules and are provided with communicated splicing parts and penetrating rib parts, the splicing blocks are inserted into the splicing parts, and the penetrating rib parts are located between the splicing parts and the bottom surfaces of the splicing grooves so as to allow the wall body steel bars to penetrate through the splicing parts.

Further, the foam heat preservation module is made of EPS or XPS, and a hollow cavity is formed in the foam heat preservation module.

Furthermore, the cavities are arranged in a penetrating manner along the height direction of the foam heat-insulation module.

Further, the polyurea coating is a graphene polyurea protective coating, and the graphene polyurea protective coating comprises a component A and a component B;

the volume ratio of the component A to the component B is 1: 0.8-1.2;

the component A is an aromatic isocyanate prepolymer;

the component B comprises the following components in parts by weight:

550 parts of amino-terminated polyether, 500 parts of amino chain extender, 0.05-5 parts of graphene, 0.05-25 parts of dispersing agent, 0.05-50 parts of anti-settling agent, 0.05-25 parts of defoaming agent and 10-50 parts of color paste.

Further, the component A comprises one or more of Wanate8311, Wanate8312 and Wanate8319 of the Tantawanese polyurethane company Limited and Suprasec2008, Suprasec9480 and Suprasec2067 of the Huntsman company.

Further, mixing the amino-terminated polyether and the amino chain extender, adding the dispersing agent, the defoaming agent and the anti-settling agent, stirring, adding the graphene, grinding, adding the color paste, stirring, and filtering to obtain the component B.

Further, the spraying thickness of the graphene polyurea protective coating is 0.5-3 mm.

Compared with the prior art, the invention has the following advantages:

according to the heat-insulating wall structure, the splicing structure is adopted among the foam heat-insulating modules built in the concrete frame, and the polyurea coating is sprayed on the surface of the wall, so that the firm connection performance between the foam heat-insulating modules and the concrete frame is improved, the integral air tightness and the protective performance of the wall are improved, and the wall strength and the heat-insulating performance of the foam heat-insulating wall are improved.

Simultaneously, adopt the foam insulation module of cuboid form to construct splice block and splice groove at the both ends of foam insulation module, realize the firm linking between the adjacent foam insulation module through the concatenation cooperation of splice block and splice groove, be convenient for splice and build, and can promote the fastness of wall body greatly. The splicing grooves are of dovetail groove structures, so that the foam heat insulation modules spliced together can be effectively prevented from being separated from each other, and the splicing firmness of the foam heat insulation modules is more reliable.

In addition, the surface of the wall body is sprayed by adopting the graphene polyurea protective coating, and in the component B, besides amino-terminated polyether, amino chain extender, dispersant, anti-settling agent, defoaming agent and the like, graphene is added; by means of the high interception performance of the graphene two-dimensional planar nano material to aggressive ions, the anti-corrosion performance of the coating is improved, and the strength, the anti-corrosion performance and other performances of the wall coating are improved. Moreover, the styrene material of the foam heat-insulation module contains a large number of C-H bonds which can form hydrogen bonds with oxygen-containing functional groups in the polyurea coating, so that the tray and the coating are tightly combined, and the integral strength and the protective performance of the wall body are greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic perspective view of a thermal insulation wall structure according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic perspective view of a foam insulation module according to a first embodiment of the present invention;

FIG. 4 is a schematic structural view of a foam insulation module according to a first embodiment of the present invention after being cut into two insulation modules from the middle;

FIG. 5 is a top view of a foam insulation module according to a first embodiment of the present invention;

description of reference numerals:

1. a concrete frame; 2. a concrete column; 3. frame reinforcing steel bars; 4. wall body reinforcing steel bars; 5. a foam insulation module; 500. a cavity; 501. splicing blocks; 502. splicing grooves; 5020. an assembling part; 5021. a tendon penetrating part; 503. a side wall; 504. a middle partition rib; 51. a male end heat preservation module; 52. female end heat preservation module.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, the usage scenario, specific mixture ratio, time and the like defined for the convenience of description are not to be construed as limiting the scope of the present invention.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment relates to a heat-insulating wall structure, which can improve the wall strength and the heat-insulating property of a foam heat-insulating wall. An exemplary structure of the insulated wall structure is shown in fig. 1.

The heat-insulating wall structure comprises a concrete frame 1 and a foam heat-insulating module 5 built in the concrete frame 1. All the foam heat-insulating modules 5 in the heat-insulating wall structure are spliced end to form the wall. And polyurea paint (not shown) is sprayed on the surface of the built wall body.

As shown in fig. 1, the concrete frame 1 is formed by pouring reinforced concrete, and includes a concrete frame 1 of a beam and a vertical concrete column 2, and frame steel bars 3 are embedded in both the concrete frame 1 and the concrete column 2. The foam heat-insulation modules 5 are built on the concrete frame 1 between the concrete upright posts 2 layer by layer, the foam heat-insulation modules 5 on each layer are built in a stacked mode, and the foam heat-insulation modules 5 on the same layer are connected in a tail-end mode and are spliced into a whole.

Based on the design concept, as shown in fig. 2 and fig. 3, for the convenience of building, the foam insulation module 5 is in a regular rectangular parallelepiped shape, and the two ends of the foam insulation module 5 are respectively configured with a splicing block 501 and a splicing groove 502, and the adjacent foam insulation modules 5 are spliced and connected through the splicing block 501 and the splicing groove 502. Adopt the foam insulation module 5 of cuboid form to construct splice piece 501 and splice groove 502 at the both ends of foam insulation module 5, realize the firm link up between the adjacent foam insulation module 5 through the concatenation cooperation of splice piece 501 and splice groove 502, the concatenation of being convenient for is built, and can promote the fastness of wall body greatly.

The shapes of the splicing blocks 501 and the splicing grooves 502 are designed according to the principle that the splicing blocks are conveniently formed by inserting and splicing, preferably, the splicing grooves 502 are dovetail grooves arranged along the height direction of the foam heat-insulation module 5, and the splicing blocks 501 are matched with the splicing grooves 502. The splicing groove 502 adopts a dovetail groove structure, so that the foam heat-insulation modules 5 spliced together can be effectively prevented from being separated from each other, and the splicing firmness of the foam heat-insulation modules 5 is more reliable.

In addition, in order to make the connection firmness between the whole wall body formed by the foam heat-insulation modules 5 and the concrete frame 1 higher, the vertically arranged wall reinforcing steel bars 4 can be implanted into the concrete frame 1, and each wall reinforcing steel bar 4 is arranged in each layer of the foam heat-insulation modules 5 in a penetrating mode. Because the wall body reinforcing steel bars 4 are preset, then, the foam heat insulation modules 5 are built, in order to facilitate building, the splicing grooves 502 penetrate through the foam heat insulation modules 5, and the splicing grooves 502 are divided into two parts, namely a splicing part 5020 and a tendon penetrating part 5021, which are communicated with each other. The splicing block 501 is inserted into the splicing part 5020, and the rib penetrating part 5021 is located between the splicing part 5020 and the bottom surface of the splicing groove 502 to allow the wall steel bar 4 to penetrate through. The splice groove 502 is highly through, and a reinforcement penetrating portion 5021 for the wall steel bars 4 to penetrate is reserved in the splice groove 502, so that the wall steel bars 4 can be conveniently arranged in the concrete frame 1.

As shown in fig. 2 and 3, when splicing is completed, the splice 501 occupies the space of the splicing part 5020, a rib penetrating part 5021 is formed between the splice 501 and the bottom surface of the splicing groove 502, and the wall steel bars 4 are arranged by passing through the rib penetrating part 5021. Preferably, the width of the tendon-passing part 5021 is set with reference to the diameter of the wall reinforcing steel bar 4.

In actual operation, each group of wall reinforcing steel bars 4 are arranged at intervals by taking the length of the foam heat insulation module 5 as the distance, the foam heat insulation module 5 is stacked between the two groups of wall reinforcing steel bars 4, and the subsequent foam heat insulation modules 5 are inserted from top to bottom, so that the splicing blocks 501 and the splicing grooves 502 are spliced and connected. Of course, the foam heat preservation modules 5 of each layer can also be built in the vertical direction, and correspondingly, the wall body steel bars 4 are arranged in the horizontal direction, and the simple direction change also belongs to the protection scope of the invention.

The thermal insulation wall structure of the embodiment is manufactured by integrally molding plastic foam materials, and preferably, EPS or XPS is adopted. EPS (polystyrene foam) or XPS (extruded polystyrene heat insulation material), which have low density, compression strength of more than 140KPa, heat conductivity coefficient of less than 0.037W/(m × k), and combustion grade of not less than B1 grade, and are suitable for being used as novel heat insulation building materials. Moreover, the self-foaming structure of the two materials ensures that the heat preservation performance of the foam heat preservation module 5 is good, and the adhesion bonding performance of the materials and the polyurea coating is good, thereby being beneficial to the exertion of the integral strength and the heat preservation performance of the wall body and the coating thereof.

Meanwhile, in order to effectively save the consumable materials of the foam heat-insulating module 5 and play a role in reducing the weight of the wall body, a hollow cavity 500 is formed on the foam heat-insulating module 5. Preferably, as shown in fig. 3 and 4, the plurality of cavities 500 are arranged to penetrate in the height direction of the foam insulation module 5, and a separation rib is formed between two adjacent cavities 500 on the same foam insulation module 5. The middle partition rib 504 in the middle of the foam heat insulation module 5 may be thickened relative to other partition rib plates, so that the middle partition rib 504 may be used as a cutting part when the same foam heat insulation module 5 is cut into the male end heat insulation module 51 and the female end heat insulation module 52. The cut male end insulation module 51 and female end insulation module 52 can be used at both ends of a layer of foam insulation module 5 to be in abutting fit with the concrete column 2, as shown in fig. 1.

The side walls 503 of the foam heat-insulation modules 5, the concrete frame 1 and the side surfaces of the concrete columns 2 form the wall surface of the wall together after the wall is built, and a layer of polyurea coating with the thickness of 0.3-5mm is sprayed on the wall surface, so that the external protection performance of the whole wall, the air tightness of the wall and the heat insulation performance are enhanced.

This embodiment thermal insulation wall structure adopt mosaic structure between each foam insulation module 5 of building in concrete frame 1 to through at wall body surface spraying polyurea coating, thereby make the firm in connection performance between foam insulation module 5 and the concrete frame 1 promote, the whole gas tightness and the barrier propterty of wall body improve, thereby make foam insulation wall's wall body intensity and thermal insulation performance improve.

Example two

The embodiment relates to a heat-insulating wall structure, and explanation is given with particular emphasis on polyurea coating sprayed on the surface of a wall in the structure.

For the arrangement of the foam insulation module 5 and the concrete frame 1 in the wall structure, reference may be made to the contents in the first embodiment, which is not described in detail in this embodiment.

For the polyurea coating coated on the surface of the wall body, the prior conventional polyurea coating can be adopted; preferably, the graphene polyurea protective coating provided by the embodiment is adopted.

The graphene polyurea protective coating comprises a component A and a component B, wherein the volume ratio of the component A to the component B is 1: 0.8-1.2, and mixing to form the graphene polyurea protective coating.

Because the two components are in liquid state, the operation is convenient by adopting volume ratio. When the volume of the component A is 1 and the volume of the component B is 0.8-1.2, the obtained coating has no obvious change in indexes such as protective performance, corrosion resistance and the like. For convenience of preparation, in this example, the ratio of the two components is 1:1.

the component A adopts aromatic isocyanate prepolymer, which can adopt one or more of Wanate8311, Wanate8312 and Wanate8319 of Tantawang polyurethane Co., Ltd, Suprasec2008, Suprasec9480 and Suprasec2067 of Huntsman Co., or other aromatic isocyanate prepolymer products with the same specification. When a plurality of isocyanates are selected, the isocyanates are mixed and stirred to be used as the component A for standby.

The component B comprises the following components in the content range on the basis of parts by weight:

550 parts of amino-terminated polyether, 500 parts of amino chain extender, 0.05-5 parts of graphene, 0.05-25 parts of dispersing agent, 0.05-50 parts of anti-settling agent, 0.05-25 parts of defoaming agent and 10-50 parts of color paste.

Wherein, the dispersant can adopt BYK-9076, BYK-2155 and BYK-2150 produced by Pico chemistry, Dispers 610 produced by Texaco, or other products with the same specification, and can adopt one or a mixture of more of the products. The defoaming agent can adopt one or a mixture of Foamex N, Airex 900, Airex 940 and Airex 950 which are produced by Degusidi high-yield, or adopt the same-specification products of other enterprises. The anti-settling agent may be one or a mixture of hums 201P, 275 produced by hamming, or the same size products of other enterprises. .

In order to obtain the overall influence of the above-defined content range on the performance of the coating, in the first proportioning scheme of the coating in this example, the component a is Wanate8311 produced by watanawa polyurethane limited, and the lower limit of the proportion of each component of the component B is adopted.

In the preparation of the component B, 250 parts of amino-terminated polyether and 250 parts of amino chain extender are mixed and stirred and are uniformly ground; then 0.05 parts BYK-9076, 0.05 parts Dego Foamex N and 0.05 parts modex 201P were added and then stirred thoroughly. Then 0.05 part of graphene is added. The grinding time after adding the graphene is controlled to be 0.5-24 hours, and when the amount of the added graphene is small, the grinding time can be properly reduced, for example, in the embodiment, 0.05 part of the graphene is added, and the grinding time is only required to be 0.5-1 hour.

In the component B, except that the graphene is a solid material, other components are liquid, and the proportioning is carried out according to a predetermined part ratio by weight. In order to realize uniform distribution of graphene in the component B, the grinding step adopts zirconium beads for wet grinding.

And after grinding, adding the color paste, continuing stirring for 30min, and filtering by using a 100-mesh filter screen to obtain the component B.

It should be noted that the preparation sequence of the two components is not limited, and the preparation of the component A or the preparation of the component B can be performed first, or the two components can be simultaneously prepared.

The prepared A component and B component are mixed according to the volume ratio of 1:1 and then used for coating, preferably in a spraying mode. The polyurea coatings obtained had the performance test results shown in table 1.

Table 1:

item	Index (I)	Item	Index (I)
				Gel time/s	15	Water absorption/%)	≤1
Surface dry time/s	60	adhesion/MPa	12.1
				Tensile strength/MPa	16.6	Salt spray resistance per hour	4500
Elongation at break/%	480	Breakdown voltage resistance/kV/mm	28
				Tear Strength/N/mm	55	Oxygen index	-
Low temperature flexibility	-40	Abrasion resistance 750g/500r (mg)	7.6

As can be seen from table 1, compared with the existing polyurea coating, the graphene polyurea protective coating prepared according to the first formulation of the present embodiment has the advantages that the conventional indexes such as tensile strength, elongation at break, adhesion and the like are improved, and the index of salt spray resistance is obviously improved. Due to the addition of the graphene in the component B, the anti-corrosion performance of the coating is improved by virtue of the high interception performance of the graphene two-dimensional planar nano material on aggressive ions, so that the anti-corrosion performance of the polyurea coating is improved. When the graphene polyurea protective coating is coated on the surface of a wall, the corrosion resistance of the coating can be greatly improved.

Meanwhile, in the preparation method of the embodiment, the functions of water proofing, curing, defoaming and the like of the component B are exerted by a process method of adding and mixing the amino-terminated polyether, the amino chain extender, the dispersant, the defoamer and the anti-settling agent in the component B in a given order. And then adding graphene for grinding and mixing, so that each component in the component B is fine and uniform, and filtering large-particle impurities for use. The graphene is fully ground and mixed, particularly, zirconium beads are adopted for wet grinding, so that the graphene is uniformly distributed in the coating, the graphene layer with a two-dimensional surface structure is distributed in the coating in a good state, a compact intercepting surface can be formed in the coated coating, penetration of corrosive ions (such as chloride ions) can be effectively prevented, and the corrosion resistance of the coating can be well exerted.

In order to further verify the influence of the change of the proportion of each component in the components on the performance of the coating, the second proportioning scheme of the coating of the embodiment is as follows:

component A was Wanate8311, produced by Tantawa polyurethane Co., Ltd.

And the component B is prepared by mixing and stirring 550 parts by weight of amino-terminated polyether and 500 parts by weight of amino chain extender.

The dispersant used was a 1:1 weight mixture of BYK-2155 (Bekk chemical) and Dispers 610 (Degussa height), and the dispersant was added in an amount of 25 parts by weight.

The antifoaming agent used was a 1:1 weight ratio mixture of Airex 900 and Airex 950, which are Degusiti, and the amount added was 0.05 part by weight. The anti-settling agent is humite 275 of Hamming, and the addition amount is 50 weight parts.

And (3) fully stirring the components after the components are added, then adding 5 parts by weight of graphene, carrying out wet grinding for 24 hours by adopting zirconium beads, finally adding color paste, continuously stirring for 30 minutes, and filtering by using a 100-mesh filter screen to obtain the component B.

And mixing and spraying the component A and the component B according to the volume ratio of 1:1 to obtain the polyurea coating. In actual use, the two-component coating spraying equipment can be adopted to synchronously carry out proportioning mixing and spraying during spraying. The results of the performance tests of the polyurea coatings obtained are shown in table 2.

TABLE 2

Item	Index (I)	Item	Index (I)
				Gel time/s	10	Water absorption/%)	≤1
Surface dry time/s	60	adhesion/MPa	13.2
				Tensile strength/MPa	18.2	Salt spray resistance per hour	5000
Elongation at break/%	460	Breakdown voltage resistance/kV/mm	27.5
				Tear Strength/N/mm	60	Oxygen index	-
Low temperature flexibility	-40	Abrasion resistance 750g/500r (mg)	7.6

As can be seen from Table 2, compared with the existing polyurea coating, the graphene polyurea protective coating prepared according to the second proportioning scheme also has the characteristic of more outstanding corrosion resistance. Compared with the graphene polyurea protective coating obtained in the first scheme, indexes such as tensile strength, elongation at break, adhesive force and the like are not obviously changed, the gelling time is increased, and the index of salt spray resistance is further improved. The graphene polyurea protective coating prepared by the proportioning scheme also has good anti-corrosion performance, and when the coating is coated on the surface of a wall, the protective performance is good, and the anti-corrosion performance can be greatly improved.

The third proportioning scheme of the coating of the embodiment is as follows:

component A was Wanate8319 produced by Tantawa polyurethane Co., Ltd.

And the component B is mixed and stirred by using 400 parts by weight of amino-terminated polyether and 350 parts by weight of amino chain extender.

The dispersant used was a mixture of BYK-9076 from Pico chemical and Dispers 610 from Degussa in a weight ratio of 1:1, and the dispersant was added in an amount of 15 parts by weight.

The defoaming agent is a mixture of Dego Foamex N, Airex 900 and Airex 950 with the weight ratio of 1:1:1, and the addition amount is 15 parts by weight. The anti-settling agent was humite 275 of hamming, added in an amount of 25 parts by weight.

And (3) fully stirring the components after the components are added, then adding 3 parts by weight of graphene, carrying out wet grinding for 16h by adopting zirconium beads, finally adding color paste, continuously stirring for 30min, and filtering by using a 100-mesh filter screen to obtain the component B.

And mixing and spraying the component A and the component B according to the volume ratio of 1:1.2 to obtain the polyurea coating. The results of the performance test are shown in Table 3.

TABLE 3

As can be seen from Table 3, the graphene polyurea protective coating prepared according to the third proportioning scheme has the characteristic of more outstanding corrosion resistance compared with the existing polyurea coating. Compared with the graphene polyurea protective coating obtained in the first scheme and the second scheme, indexes such as tensile strength, elongation at break, adhesive force and the like are not obviously changed, the gel time is similar to that in the first embodiment, and the index of salt mist resistance is further improved compared with that in the second embodiment.

By adjusting the types and the proportion of the components in the components, the polyurea coating with obviously improved anti-corrosion performance can be obtained within the range limited by the invention. By means of the uniform distribution of the graphene in the component B, the effective blocking of corrosive ions such as chloride ions is realized by utilizing the layer-by-layer overlapped single-layer two-dimensional honeycomb lattice structure formed by the graphene, so that the corrosion resistance of the polyurea coating is obviously improved, and meanwhile, the integral protection performance of the coating is improved.

In addition, it should be noted that the foam thermal insulation module 5 of the embodiment adopts polystyrene foam material, and the graphene polyurea protective coating with the thickness of 0.5-3mm is coated on the surface of the foam thermal insulation module, so that the impact resistance, the thermal insulation property and the corrosion resistance of the wall body can be greatly improved. Preferably, the thickness of the spray coating is 1-2 mm.

The main material of the polystyrene foam is styrene, and the styrene material contains a large number of C-H bonds, so that the polystyrene foam is easily and firmly combined with substances containing oxygen elements through hydrogen bonds. The polyurea coating is a good high polymer material and comprises isocyanate, amino-terminated ether, polyether polyol and amine chain extender, and rich oxygen-containing functional groups in the coating can form hydrogen bonds with polystyrene foam, so that the coating is stably attached to the polystyrene foam, and a wall body and a coating are tightly combined.

The polyurea coating has the tensile strength of up to 16MPa, the elongation at break of up to 450 percent and the tearing strength of up to 50N/mm, is a good protective coating, and can effectively improve the impact resistance of a wall body.

By spraying the graphene polyurea protective coating with a certain thickness, good protection can be formed on the surface of the wall, and by means of the outstanding performance indexes such as tensile strength, elongation at break, tearing strength and wear resistance of the graphene polyurea protective coating, the overall strength, the protection performance and the heat insulation performance of the wall can be greatly improved, so that the service life of a building is effectively prolonged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.