CN115785727B

CN115785727B - Preparation method and preparation device of mineral wool board inorganic coating

Info

Publication number: CN115785727B
Application number: CN202211701906.7A
Authority: CN
Inventors: 李伟成; 陈燕; 胡中源
Original assignee: Dragon Brand Coating Beijing Co ltd
Current assignee: Dragon Brand Coating Beijing Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-12-15
Anticipated expiration: 2042-12-28
Also published as: CN115785727A

Abstract

The application discloses a preparation method of mineral wool board inorganic paint, which comprises the following steps: adding deionized water, and forming vortex under the stirring state of 500-800 rpm; continuously stirring, and pouring the modified sodium bentonite into a water flow vortex at a constant speed; then adding a dispersing agent A and an amine capturing agent; then adding 50% of defoaming agent; sequentially adding titanium dioxide, an ammonia absorbent, an aldehyde removing agent, a dispersing agent B, mineral fibers and functional fillers, and stirring at 1300-1450 rpm to obtain water slurry; stirring the water slurry at 80-90 rpm, and dripping the inorganic adhesive and the rest 50% of defoamer to obtain a finished product. Also discloses a preparation device for the preparation method of the mineral wool board inorganic coating. According to the application, a bactericide is not added, and the dry film vapor permeability of the coating is improved by using an inorganic adhesive, so that the generation of mould is reduced; the application solves the problem of unstable components in the paint by low-speed paint adjusting treatment, so that the paint film achieves the optimal ventilation effect.

Description

Preparation method and preparation device of mineral wool board inorganic coating

Technical Field

The application relates to the technical field of coatings, in particular to a preparation method and a preparation device of mineral wool board inorganic coatings.

Background

Because the mineral wool board has good sound absorption and noise reduction effects, the mineral wool board has the advantages of excellent decorative effect, good heat insulation performance, safety, fire prevention, simple and convenient cutting, easy decoration and the like, and is widely applied to suspended ceilings in various places with sound absorption requirements.

However, in the use process, the mineral wool board can emit gases with pungent odor such as organic amine, ammonia gas and the like in the spraying and drying processes on the production line, and meanwhile, after the mineral wool board is used in a damp and hot area, the interior of the mineral wool board is easy to be damped and moldy, and black mold spots can be formed on the board surface. The bad smell gas is mainly generated by decomposing certain components in the mineral wool board in the high-temperature drying process, and the mildew spots on the surface of the mineral wool board are mainly generated by bacteria growing in the water-soluble adhesive in the mineral wool board in the high-temperature and humid environment.

If the problems are to be solved, the simplest way is to apply a coating with the functions of sterilization, deodorization and the like on the surface of a mineral wool board to treat the decomposition and mildew in the board in a targeted way, but the bactericide itself has a certain toxin, the sterilization effect is weakened along with the extension of the use time limit after the use, and the coating containing a large amount of bactericide after the scrapping treatment can influence the environment to cause a large amount of pollution.

There is a need for a low-toxicity harmless coating to solve the problems of easy decomposition of harmful substances and easy mold generation in a wet environment in mineral wool boards at the same time, and a preparation method is mainly provided for preparing the coating.

Disclosure of Invention

The application aims to provide a preparation method and a preparation device of mineral wool board inorganic paint, which are used for solving the technical problem that mineral wool boards are easy to mould in a high-temperature and humid state in the prior art.

In order to solve the technical problems, the application specifically provides the following technical scheme:

the application provides a preparation method of mineral wool board inorganic paint, which comprises the following steps:

adding deionized water, and forming vortex under the stirring state of 500-800 rpm;

continuously stirring, pouring the modified sodium bentonite into a water flow vortex at a constant speed along the stirring cavity in a trickle mode, and stirring for 3-5min;

then adding a dispersing agent A and an amine capturing agent, and dispersing for 2-3min;

then adding 50% defoamer, stirring for 2-3min;

sequentially adding titanium dioxide, an ammonia absorbent, an aldehyde removing agent, a dispersing agent B, mineral fibers and functional fillers, and stirring at 1300-1450 rpm to obtain water slurry;

stirring the water slurry at 80-90 rpm, dropwise adding the inorganic adhesive and the rest 50% of defoamer, and continuously stirring for 10min to obtain a finished product.

As a preferred scheme of the application, the mineral wool board inorganic paint at least comprises the following components in percentage by weight: 20.15 to 26.4 percent of water, 0.1 to 0.5 percent of modified sodium bentonite, 0.4 to 0.8 percent of dispersant A, 0.1 to 0.3 percent of dispersant B, 0.1 to 0.3 percent of organic amine scavenger, 0.05 to 0.2 percent of defoamer, 1 to 10 percent of titanium dioxide, 1 to 2 percent of ammonia absorbent, 2 to 5 percent of formaldehyde remover, 5 to 8 percent of mineral fiber, 45 to 60 percent of functional filler and 3 to 8 percent of inorganic adhesive;

wherein, the inorganic adhesive is potassium silicate and modified nano silica sol according to the mass ratio of 2:1, and mixing.

As a preferable scheme of the application, the amine capturing agent consists of benzenesulfonyl chloride and a wetting agent in a mass ratio of 1:0.8-1.2;

wherein the ammonia gas absorbent consists of molecular sieves and organic salts in a mass ratio of 1:1-3;

wherein the modified sodium bentonite consists of sodium carboxymethylcellulose, sodium carbonate and sodium bentonite in a mass ratio of 1:1:18;

wherein the functional filler comprises the following components in percentage by mass: 62%:30% of mica powder, talcum powder and heavy calcium carbonate;

wherein the mineral fiber consists of carbon fiber and gypsum fiber with the mass ratio of 1:1-3.

The application further provides a preparation device of mineral wool board inorganic paint, which comprises:

the central stirring tank is provided with a stirring cavity for stirring a finished product and a variable frequency stirring shaft arranged in the stirring cavity, and the rotating speed of the variable frequency stirring shaft can be changed along with the change of production steps;

the boundary aggregate assembly is arranged at the tank opening of the central stirring tank and is circumferentially arranged on the inner wall of the central stirring tank, and the boundary aggregate assembly rotates in the central stirring tank for discharging;

the quantitative discharging assembly is used for respectively quantitatively introducing two or more materials into the boundary aggregate assembly for mixing;

the mixed materials are sequentially discharged into the stirring cavity from the tank opening of the central stirring tank under the drive of the boundary aggregate component, and are mixed with the original materials in the stirring cavity.

As a preferable mode of the application, the quantitative blanking component, the boundary aggregate component and the stirring chamber are sequentially arranged in the central stirring tank from top to bottom.

As a preferred scheme of the application, the boundary aggregate component comprises an annular track arranged in the central stirring tank and an aggregate shell moving on the annular track through a driving group, wherein the aggregate shell is arranged in the central stirring tank, the upper end of the aggregate shell is open, and the quantitative blanking component passes through the central stirring tank and is communicated with the aggregate shell;

the mixing device is characterized in that a mixing chamber is arranged in the aggregate shell, a stirring roller is arranged in the mixing chamber, a feed opening is formed in the bottom of the mixing chamber, the feed opening is arranged right below the stirring roller, and when the feed opening is opened, the stirring roller drives materials in the mixing chamber to flow out from the feed opening.

As a preferable scheme of the application, the annular track comprises an outer ring attached to the inner wall of the central stirring tank and an inner ring arranged on the outer ring through a plurality of supporting rods, the outer ring and the inner ring are in a concentric circle structure, and the inner ring is suspended above the stirring chamber;

a hollow annular structure is arranged between the inner ring and the outer ring and is divided into a plurality of hollow blocks by the support rods; the driving group drives the aggregate shell to move on the inner ring and the outer ring, and the discharging opening is arranged between the inner ring and the outer ring and is arranged right above the hollow annular structure.

As a preferred embodiment of the present application, the driving unit is disposed at a front half portion of the aggregate housing, and one end of the aggregate housing, which is far from the driving unit, is inclined downward and is in intermittent contact with the support bar when the aggregate housing slides on the inner ring and the outer ring.

As a preferable scheme of the application, a position origin is arranged between the outer ring and the quantitative blanking component, a righting plate is arranged on the position origin, the righting plate is arranged on the supporting rod, the height of the righting plate is equal to the distance between the supporting rod and the aggregate shell, and when the aggregate shell moves to the position origin, the bottom of the aggregate shell is attached to the upper end part of the righting plate, and the righting plate is used for righting the aggregate shell.

As a preferable scheme of the quantitative blanking assembly, the quantitative blanking assembly comprises a plurality of conveyor belts arranged on the origin of the position, each conveyor belt is provided with a plurality of storage tanks, and corresponding materials are placed in the storage tanks;

the storage groove is driven by the conveyor belt to sequentially pass through the position origin and pour materials into the aggregate shell when the storage groove is turned over.

Compared with the prior art, the application has the following beneficial effects:

1. according to the application, the bactericide is not added, and the dry film vapor permeability of the coating is improved by using the inorganic adhesive, so that the volatile organic amine, inorganic ammonia and water vapor in the mineral wool board can be rapidly discharged out of the board along a paint film channel, and the residue is not easy to occur, thereby reducing the odor and mildew risk in the mineral wool board and reducing the generation of mildew;

and simultaneously, an amine capturing agent and an ammonia gas absorbing agent are added into the coating to absorb and capture volatile organic amine and inorganic ammonia generated by raw material decomposition in the spraying and high-temperature drying processes of the mineral wool board.

2. According to the application, the stirring rate of the system is continuously converted to produce the coating, so that the reactions such as complexation and the like caused by excessive components in the system are prevented, particularly in low-speed paint adjusting treatment, the inorganic adhesive is added into homogeneous water slurry for paint mixing, the permeability of a paint film channel after the coating is formed is improved, and the ventilation effect is improved;

3. the application also realizes the accurate mixing and discharging of the mixed dry material and the mixed wet material through the production device for the existing preparation, improves the mixing precision of the powder in the coating, and simultaneously meets the requirements of the dispersing discharging and the dripping discharging in the production method by using the dispersing discharging mode.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.

FIG. 1 is a schematic flow chart of a method for preparing mineral wool board inorganic paint;

FIG. 2 is a schematic structural view of a device for preparing mineral wool board inorganic paint according to the present application;

FIG. 3 is a schematic view of the structure of the aggregate housing during movement provided by the present application;

FIG. 4 is a schematic view of the aggregate housing of the present application at the origin of the position;

fig. 5 is a schematic view of a circular track according to the present application.

Reference numerals in the drawings are respectively as follows:

1-a central stirring tank; 2-a stirring chamber; 3-a variable frequency stirring shaft; 4-boundary aggregate assembly; 5-quantitative blanking component; 6-righting plate;

401-circular track; 402-drive group; 403-aggregate housing; 404-a mixing chamber; 405-stirring roller; 405-a feed opening;

4011-an outer ring; 4012-an inner ring; 4013-support rods;

501-a conveyor belt; 502-storage tank.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The application provides mineral wool board inorganic paint which comprises the following components in parts by weight: 20.15 to 26.4 percent of water, 0.1 to 0.5 percent of modified sodium bentonite, 0.4 to 0.8 percent of dispersant A, 0.1 to 0.3 percent of dispersant B, 0.1 to 0.3 percent of amine scavenger, 0.05 to 0.2 percent of defoamer, 1 to 10 percent of titanium dioxide, 1 to 2 percent of ammonia absorbent, 2 to 5 percent of formaldehyde remover, 5 to 8 percent of mineral fiber, 45 to 60 percent of functional filler and 3 to 8 percent of inorganic adhesive.

Wherein, in order to improve the ventilation effect of the coating, the inorganic adhesive is potassium silicate and modified nano silica sol according to the mass ratio of 2:1, and mixing.

The mineral wool coating is made of inorganic silicate adhesive, so that the vapor permeability of a coating film is increased, when the mineral wool board is finished, residual gas volatilizes in a high-temperature and humid area in the south due to moisture absorption in the board, the gas volatilizes out of the coating rapidly, and the residual moisture and mildew are prevented along with the volatilization of flowing air. Thereby reducing the use of bactericides and reducing the biological pollution to the environment.

Meanwhile, an amine capturing agent and an ammonia gas absorbing agent are added into the basic formula of the coating, so that amine gas and ammonia gas volatilized in a mineral wool board coating production line and after home decoration are effectively captured and absorbed, and volatilization of harmful substances and generation of unpleasant smell in the mineral wool board are greatly reduced.

Further, in order to remove volatile organic amine bad gases generated by raw material decomposition in the mineral wool board in a high-temperature environment, the amine capturing agent consists of benzenesulfonyl chloride and a wetting agent in a mass ratio of 1:0.8-1.2. Benzene sulfonic acid chloride is used as an organic amine capturing agent, and the benzene sulfonic acid chloride and the organic amine react to generate solid amine which is not easy to volatilize in the air when the organic amine is generated.

In order to increase the dispersity of the benzenesulfonyl chloride, the amine scavenger is a liquid material that is more easily dispersed in the coating at the time of production. Meanwhile, in order to improve the dispersity of the benzenesulfonyl chloride, the wetting agent is any one or more of polyoxyethylene alkylphenol ether, polyoxyethylene fatty alcohol ether and polyoxyethylene polyoxypropylene segmented copolymer.

Further, in order to remove volatile inorganic ammonia bad gases generated by raw material decomposition in the mineral wool board in a high-temperature environment, the ammonia absorbent consists of molecular sieve and organic salt in a mass ratio of 1:1-3. The molecular sieve is natural zeolite. In order to increase the mildew-proof effect of the paint, any one or more of organic salt sodium ethoxide.

In conclusion, the organic amine capturing agent and the ammonia gas absorbing agent are added into the coating, under the condition of high-temperature drying, when the organic amine and the ammonia gas volatilize to the coating, the organic amine capturing agent and the ammonia gas absorbing agent in the coating rapidly react with each other to generate solid salt, and meanwhile, the solid salt and the inorganic adhesive form a compact three-dimensional net structure, so that most volatile gas is absorbed in a coating film in the spraying and drying process of the mineral wool board coating to form a paint film component, and the unpleasant gas discharged to the external environment is very little. For the high-temperature and humid areas in the south, the organic amine salt and the inorganic ammonia salt in the paint film are strongly combined with the silica bond of the inorganic adhesive, so that the volatile organic amine and the inorganic ammonia are not generated by secondary decomposition.

Furthermore, in order to increase the aldehyde removing performance of mineral cotton, the aldehyde removing agent is an organic salt powder material, and the aldehyde removing agent is added in the formula of the application, so that the paint film has the aldehyde removing performance.

Wherein the organic salt is one or more of sodium oxalate and ethylamine chloride salt, and active groups in the sodium oxalate and the ethylamine chloride salt can replace active hydrogen in aldehyde groups to enable aldehyde substances to generate non-aldehyde substances.

Further, the modified sodium bentonite consists of sodium carboxymethylcellulose, sodium carbonate and sodium bentonite in a mass ratio of 1:1:18. In some cases, the paint films of the same batch of paint have no chromatic aberration and no effect, and multiple investigation shows that the paint film inconsistency of the type is caused by the fact that the paint is diluted to a viscosity suitable for automatic spraying before use, and a large amount of water is needed to be added, so that the paint layering is serious, the solid content of the paint on different mineral wool plates, even the proportion of each component in the paint, is changed, and the paint films of different plates are inconsistent. The method for solving the problem is to select modified sodium bentonite as the modified sodium bentonite, so that the paint has good anti-settling effect when diluted by adding water, and the components in the paint are ensured to be uniformly distributed. The modified sodium bentonite contains 5% of sodium carboxymethyl cellulose, 5% of sodium carbonate and 90% of sodium bentonite, and the three raw materials are required to be uniformly mixed in advance during preparation.

Preferably, in order to reduce the paint film bloom phenomenon, the functional filler consists of mica powder, talcum powder and heavy calcium carbonate in a mass ratio of 4:31:15. The mica powder, the talcum powder and the heavy calcium carbonate are matched according to the components, so that the light reflection of each point of a paint film is consistent after the paint film is subjected to a drying procedure, the paint film is reduced from being stained, and meanwhile, the functional powder material does not contain free multivalent metal ions.

As the lower the gloss of the paint film of the surface layer of the mineral wool board is, the less obvious the color difference of the paint film of the unit board or a plurality of boards is, in order to further reduce the glossiness of the paint film, the particle size distribution of the powder material needs to be strictly controlled, and the test data shows that the particle size distribution of the powder material in the paint formula of the mineral wool board is as follows, the paint film has proper gloss and is even and does not bloom: d10 is between 1.3 and 2.8, D50 is between 12 and 18, and D90 is between 30 and 38.

Secondly, the mica powder is added, and powder material particles and other component particles in the paint are uniformly, stably and scientifically distributed by utilizing the lamellar structure of the mica powder, so that the powder particles in the paint film are alternately arranged, moisture is not densely piled under the condition of quick volatilization, and the gloss of the paint film is effectively reduced. Meanwhile, the particles in the paint film are uniformly distributed and the scattering effect is consistent, so that the paint film has consistent luster and does not bloom, and in addition, the mica powder can assist in improving the sedimentation resistance of a paint system.

Further, in order to improve the sound absorption and noise reduction effects of the mineral wool board, the mineral fibers are composed of carbon fibers and gypsum fibers in a mass ratio of 1:1-3.

In order to improve the solid content in the paint, the paint has strong porous and rough performance of covering the base surface of the mineral wool board, and simultaneously has strong fullness and good hand feeling of a paint film, ensures low viscosity of the paint so as to be beneficial to spraying construction, and the dispersing agent A is sodium polyacrylate; the dispersing agent B is powdery sodium phosphate.

The water is one or more of drinking water, purified water or deionized water. Water is an indispensable component in mineral wool board coating, and in order to reduce raw material cost, the application selects drinking water as a formula component.

Preferably, the defoamer is a liquid organic silicon material, and in order to avoid oil shrinkage of a paint film sprayed on a mineral wool board, the application selects the organic silicon type defoamer.

Preferably, the titanium dioxide is rutile type, and a certain amount of rutile titanium dioxide is added into the formula in order to improve the covering power of the product.

In summary, the mineral wool board inorganic coating provided by the application has the following beneficial effects and performances:

1. reducing volatilization of harmful gas and bad smell gas:

1. through adding organic amine capturing agent and ammonia gas absorbing agent into the paint, and carrying out adsorption chemical reaction with volatilized organic amine and ammonia gas, so that the organic amine and the ammonia gas become solid salts, and the volatilized bad smell gas of the mineral wool paint is removed:

2. the inorganic adhesive forms a compact three-dimensional net structure, most volatile gases are absorbed in the coating film to form a paint film component, volatilization of unpleasant gases is reduced, and the organic amine salt and the inorganic ammonia salt in the paint film are strongly combined with the silicon-oxygen bond of the inorganic adhesive, so that the volatile organic amine and the inorganic ammonia are not generated by secondary decomposition.

2. Mildew-proof antibacterial:

1. the mineral wool coating is made of inorganic silicate adhesive, so that the coating film has excellent vapor permeability, is favorable for moisture volatilization and prevents mildew spots;

2. the inorganic silicate adhesive has strong alkalinity, and the reactivity is high, and most of the materials comprise water, so that the mildew-proof and antibacterial properties are extremely excellent, no special mildew-proof agent or microbial inoculum is needed to be added, and compared with an organic adhesive film, the inorganic adhesive film has good vapor permeability, the vapor in a mineral wool board volatilizes quickly, the time for drying is short, and the water vapor in the board can not be sealed in the board for a long time, so that mildew is easy to cause in the mineral wool board, and the water-soluble polymer material grows mildew in a humid environment;

3. the formaldehyde remover and the ammonia gas absorbent are alkaline, and the mildew-proof and antibacterial effects are achieved.

3. Sound absorption properties:

the application mainly improves the sound absorption and noise reduction functions of the mineral wool board by adding mineral fibers into the formula.

4. Aldehyde removal performance:

the application mainly adds the aldehyde removing auxiliary agent in the formula to ensure that the mineral wool board coating has aldehyde removing performance.

5. The decorative effect is good:

1. by adding two dispersing agents of sodium polyacrylate and powdery sodium phosphate, the powdery sodium phosphate dispersing agent can effectively reduce the viscosity of paint slurry, improve solid content under the same viscosity, improve the fullness and dry film covering power of a paint film, effectively cover uneven and porous defects of a substrate, enable two spraying to achieve the expected paint film effect, and simultaneously reduce the painting amount on each plate to reduce the cost;

2. mineral oil is added into the paint formula to defoam, so that the phenomenon of paint film bloom is reduced;

3. by adding the modified sodium bentonite, the layering phenomenon of the paint is reduced, and the color difference and the effect of a paint film are prevented from being caused;

4. the particle size distribution of the powder material is strictly controlled, and the mica powder is added, so that the gloss of a paint film is effectively reduced, and meanwhile, the gloss of the paint film is consistent and does not bloom because the particles in the paint film are uniformly distributed and the scattering effect is consistent.

6. The system is stable:

the components in the formula do not contain polyvalent metal ions, so that the stability of the system is improved.

The application mainly discloses a preparation method of mineral wool board inorganic paint, which comprises the following steps:

then adding 50% defoamer, stirring for 2-3min;

stirring the water slurry at 80-90 rpm, dropwise adding the inorganic adhesive and the rest 50% of defoamer, and continuously stirring for 10min to obtain the finished product.

Mainly, in order to improve the dispersity of the application, the modified sodium bentonite is poured into a water flow vortex at a constant speed along the stirring cavity side in a trickle mode, so that the pH value of a water system is improved as soon as possible, and excessive stirring is prevented; and the paint mixing is more stable and is not easy to modify by precisely regulating and controlling the stirring rate. Following the production method described above, three examples are provided below.

The application is described in further detail below in connection with the following detailed description:

example 1:

1. calculated as 100kg total product by weight: 20.15kg of water, 0.1kg of modified sodium bentonite, 0.8kg of dispersing agent A, 0.3kg of dispersing agent B, 0.1kg of amine capturing agent, 0.05kg of defoamer, 1kg of titanium dioxide, 1kg of ammonia absorbent, 5kg of formaldehyde scavenger, 8kg of mineral fiber, 60kg of functional filler and 3.5kg of inorganic adhesive are weighed.

2. Adding 20.15kg of deionized water, and forming vortex under the stirring state of 500-800 rpm;

3. continuously stirring, pouring 0.1kg of modified sodium bentonite into a water flow vortex at a constant speed along the side of a stirring cavity in a trickle mode, and stirring for 3-5min;

4. then adding 0.8kg of dispersant A and 0.1kg of amine capturing agent, and dispersing for 2-3min;

5. then adding 0.025kg of defoaming agent, and stirring for 2-3min;

6. then sequentially adding 1kg of titanium dioxide, 1kg of ammonia gas absorbent, 5kg of formaldehyde remover, 0.3kg of dispersing agent B, 8kg of mineral fiber and 60kg of functional filler, and stirring at 1300-1450 rpm to obtain water slurry;

7. the aqueous slurry was stirred at 80-90 rpm, 3.5kg of the inorganic adhesive and the remaining 0.025kg of the antifoaming agent were added dropwise, and stirring was continued for 10 minutes to prepare example 1.

Example 2:

1. calculated as 100kg total product by weight: 22.5kg of water, 0.3kg of modified sodium bentonite, 0.6kg of dispersing agent A, 0.2kg of dispersing agent B, 0.2kg of amine capturing agent, 0.125kg of defoamer, 5.5kg of titanium dioxide, 1.5kg of ammonia absorbent, 3.5kg of formaldehyde scavenger, 6.5kg of mineral fiber, 50kg of functional filler and 5.5kg of inorganic adhesive are weighed;

2. adding 22.5kg deionized water, and forming vortex under the stirring state of 500-800 rpm;

3. continuously stirring, pouring 0.3kg of modified sodium bentonite into a water flow vortex at a constant speed along the side of a stirring cavity in a trickle mode, and stirring for 3-5min;

4. then adding 0.6kg of dispersant A and 0.2kg of amine capturing agent, and dispersing for 2-3min;

5. then adding 0.0625kg of defoaming agent, and stirring for 2-3min;

6. then sequentially adding 5.5kg of titanium dioxide, 1.5kg of ammonia gas absorbent, 3.5kg of formaldehyde remover, 0.2kg of dispersing agent B, 6.5kg of mineral fiber and 50kg of functional filler, and stirring at 1300-1450 r/min to prepare water slurry;

7. the aqueous slurry was stirred at 80-90 rpm, 5.5kg of the inorganic adhesive and the remaining 0.0625kg of the antifoaming agent were added dropwise, and stirring was continued for 10 minutes to prepare example 2.

Example 3:

1. calculated as 100kg total product by weight: 26.4kg of water, 0.5kg of modified sodium bentonite, 0.4kg of dispersant A, 0.1kg of dispersant B, 0.3kg of amine capturing agent, 0.3kg of defoamer, 10kg of titanium dioxide, 2kg of ammonia absorbent, 2kg of formaldehyde scavenger, 5kg of mineral fiber, 45kg of functional filler and 8kg of inorganic adhesive are weighed;

2. 26.4kg of deionized water is added, and vortex is formed under the stirring state of 500-800 rpm;

3. continuously stirring, pouring 0.5kg of modified sodium bentonite into a water flow vortex at a constant speed along the side of a stirring cavity in a trickle mode, and stirring for 3-5min;

4. then adding 0.4kg of dispersant A and 0.3kg of amine capturing agent, and dispersing for 2-3min;

5. then adding 0.15kg of defoaming agent, and stirring for 2-3min;

6. then sequentially adding 10kg of titanium dioxide, 2kg of ammonia gas absorbent, 2kg of aldehyde removing agent, 0.1kg of dispersing agent B, 5kg of mineral fiber and 45kg of functional filler, and stirring at 1300-1450 r/min to obtain water slurry;

7. the aqueous slurry was stirred at 80-90 rpm, 8kg of the inorganic adhesive and the remaining 0.15kg of the antifoaming agent were added dropwise, and stirring was continued for 10 minutes to prepare example 3.

The product performance index of examples 1-3 above meets the internal control index requirements as shown in table 1.

TABLE 1

1. Mineral wool board inorganic paint physical performance index (execution GB/T9756-2018 Standard of synthetic resin emulsion inner wall paint)

TABLE 2

As can be seen from table 2, examples 1, 2 and 3 all have good brushing properties.

2. Mineral wool board inorganic paint environmental protection performance index (Standard of execution GB18582-2020 "limit of harmful substances in wall coating for construction)

TABLE 3 Table 3

As is clear from table 3, no harmful substances were detected in each of examples 1, 2 and 3.

3. Mineral wool board inorganic paint antibacterial mildew-proof performance index (executing HG/T3950-2007 antibacterial paint standard)

TABLE 4 Table 4

As can be seen from Table 4, examples 1, 2 and 3 all have strong antibacterial and mildew-proof properties.

4. Mineral wool board inorganic paint combustion performance index (Standard of execution GB8624-2012 "classification of Combustion Performance of building Material and products)

TABLE 5

5. Mineral wool board inorganic paint formaldehyde removal performance index (JC/T1074-2008 standard of purification performance of coating material for indoor air purification function)

TABLE 6

As can be seen from Table 6, examples 1, 2 and 3 all had good formaldehyde purification performance, and the formaldehyde purification performance gradually increased with the increase of the formaldehyde scavenger in the formulation.

In the application, the stirring rate of the system is continuously converted to produce the coating, so that the reactions such as complexation and the like caused by excessive components in the system are prevented, and particularly in the low-speed paint adjusting treatment, the inorganic adhesive is required to be added into the homogeneous water slurry for paint mixing, so that the permeability of a paint film channel after the coating is formed is improved, and the ventilation effect is improved.

In the preparation method, the adopted materials have extremely high requirements on stirring speed and extremely high requirements on mixing of the materials, and in the application, both the modified sodium bentonite and the functional filler need to be prepared at present and have extremely accurate production proportion, and in order to achieve the production effect, the modified sodium bentonite consists of sodium carboxymethyl cellulose, sodium carbonate and sodium bentonite with the mass ratio of 1:1:18, and the functional filler consists of 8 percent: 62%:30% of mica powder, talcum powder and heavy calcium carbonate.

If a large amount of powder is prepared in advance, the dispersity of certain powder in the system is low, and the final production effect is affected during mass production; if the mixing is carried out directly during production, corresponding mixing tools are absent, and the powder proportioning is very accurate and difficult to control, so that a production device is also needed to improve the existing production device.

As shown in fig. 2 to 5, the application also provides a preparation device of mineral wool board inorganic paint, which comprises a central stirring tank 1, a boundary aggregate assembly 4 arranged on the central stirring tank 1 and a quantitative blanking assembly 5 arranged on the boundary aggregate assembly 4.

The central agitator tank 1 has the stirring cavity 2 that is used for stirring the finished product and sets up the frequency conversion (mixing) shaft 3 in stirring cavity 2, and the rotational speed of frequency conversion (mixing) shaft 3 can change along with the change of production step, and a plurality of ration unloading pipes communicate with stirring cavity 2 for unloading other kinds of materials such as liquid.

The boundary aggregate component 4 is arranged at the tank opening of the central stirring tank 1 and is arranged on the inner wall of the central stirring tank 1 in a surrounding manner, and the boundary aggregate component 4 rotates in the central stirring tank 1 for discharging.

The quantitative discharging component 5 respectively and quantitatively feeds two or more materials into the boundary aggregate component 4 for mixing.

The mixed materials are sequentially discharged from the tank opening of the central stirring tank 1 to the stirring chamber 2 under the drive of the boundary aggregate component 4, and are mixed with the original materials in the stirring chamber 2.

The quantitative blanking component 5 can not only put two or more dry powder materials into the boundary aggregate component 4 for mixing, but also carry out dispersed blanking such as modified sodium bentonite, functional filler and mineral fiber at the boundary of the stirring chamber 2 after being uniformly mixed. And can carry out the unloading with amine scavenger, inorganic adhesive such powder and liquid, when unloading in to boundary aggregate subassembly 4, the material is mixed evenly in boundary aggregate subassembly 4, moves around the jar mouth of central agitator tank 1 after mixing evenly, and in gradually unloading to stirring cavity 2, the dispersity of material in the solution improves.

And because the inorganic adhesive is in a small amount of dropwise addition type blanking in the paint mixing process, the inorganic adhesive is put into the boundary aggregate assembly 4 for blanking, the requirement of the dropwise addition type blanking can be met, other dropwise addition type blanking elements are not needed, and the multiple purposes of the boundary aggregate assembly 4 are realized.

The basic principles of the ammonia gas absorbent, the modified sodium bentonite, the functional filler, the mineral fiber and the inorganic adhesive are respectively introduced into the boundary aggregate assembly 4 through the quantitative blanking assembly 5, the corresponding ammonia gas absorbent, the modified sodium bentonite, the functional filler, the mineral fiber and the inorganic adhesive are formed by mixing and stirring in the boundary aggregate assembly 4, and the materials directly fall into the stirring chamber from the inside of the boundary aggregate assembly 4 after the mixing is completed. The quantitative discharging assembly 5, the boundary aggregate assembly 4 and the stirring chamber 2 are sequentially arranged in the central stirring tank 1 from top to bottom.

The sodium carboxymethyl cellulose, the sodium carbonate and the sodium bentonite are respectively placed in a quantitative blanking component 5 according to corresponding parts, and the sodium carboxymethyl cellulose, the sodium carbonate and the sodium bentonite with the mass ratio of 1:1:18 enter a boundary aggregate component 4 simultaneously through one-time blanking, the boundary aggregate component 4 stirs the sodium carboxymethyl cellulose, the sodium carbonate and the sodium bentonite to produce the modified sodium bentonite, and finally the produced modified sodium bentonite is introduced into a stirring cavity 2 with deionized water to finish production.

Specifically, for more convenient realization boundary dispersion type unloading, boundary aggregate assembly 4 is including setting up the annular rail 401 in central agitator tank 1 and through the aggregate casing 403 that drive group 402 removed on annular rail 401, aggregate casing 403 sets up in central agitator tank 1, and aggregate casing 403's upper end is opened, quantitative unloading subassembly 5 pass central agitator tank 1 and aggregate casing 403 intercommunication.

The aggregate shell 403 is internally provided with a mixing chamber 404, the mixing chamber 404 is internally provided with a stirring roller 405, the bottom of the mixing chamber 404 is provided with a feed opening 406, the feed opening 406 is arranged under the stirring roller 405, and when the feed opening 406 is opened, the stirring roller 405 drives materials in the mixing chamber 404 to flow out from the feed opening 406.

When the blanking is needed, the aggregate shell 403 moves circularly in the stirring chamber 2 along the annular track 401, the stirring roller 405 is opened by the movement, and the material enters the blanking opening 406 under the driving of the stirring roller 405 and flows into the stirring chamber 2 from the blanking opening 406, so that the process of pouring the modified sodium bentonite into the water flow vortex at a uniform speed along the stirring chamber in a trickle mode is realized.

In order to prevent the annular track 401 from blocking the discharging of the materials, the annular track 401 comprises an outer ring 4011 attached to the inner wall of the central stirring tank 1 and an inner ring 4012 mounted on the outer ring 4011 through a plurality of supporting rods 4013, the outer ring 4011 and the inner ring 4012 are of concentric circle structures, and the inner ring 4012 is suspended above the stirring chamber 2.

A hollow annular structure is arranged between the inner ring 4012 and the outer ring 4011, and the hollow annular structure is divided into a plurality of hollow blocks by a support rod 4013; the driving group 402 drives the aggregate shell 403 to move on the inner ring 4012 and the outer ring 4011, and the feed opening 406 is arranged between the inner ring 4012 and the outer ring 4011 and right above the hollow annular structure.

Particularly, the conventional blanking method is preferable to the conventional blanking method, in which only dry material is completely blanked, and in order to simultaneously support wet material having a certain viscosity and also completely blanked from the aggregate housing 403, the driving group 402 is disposed at the front half portion of the aggregate housing 403, and when the aggregate housing 403 slides on the inner ring 4012 and the outer ring 4011, one end of the aggregate housing 403 away from the driving group 402 is inclined downward and intermittently contacts the support rod 4013.

When aggregate shell 403 inclines, feed opening 406 sets up the minimum at aggregate shell 403, and aggregate shell 403 all can shake when receiving the strike at the removal in-process at every turn for the material in the mixing chamber 404 is shaken out from feed opening 406, and the material can concentrate the bottom in mixing chamber 404, makes things convenient for subsequent unloading.

In order to prevent the quantitative blanking component 5 from being in an inclined state when blanking, the aggregate housing 403 is inconvenient to blanking, a position origin is arranged between the outer ring 4011 and the quantitative blanking component 5, a position origin is provided with a position correcting plate 6, the position correcting plate 6 is arranged on the supporting rod 4013, the height of the position correcting plate 6 is equal to the distance between the supporting rod 4013 and the aggregate housing 403, when the aggregate housing 403 moves to the position origin, the bottom of the aggregate housing 403 is attached to the upper end of the position correcting plate 6, the position correcting plate 6 is used for righting the aggregate housing 403, each time the aggregate housing 403 passes through the position origin, the aggregate housing 403 is in a horizontal state, and the feeding of the position origin is completed.

Specifically, the structure of the quantitative discharging component 5 is as follows: the quantitative blanking assembly 5 comprises a plurality of conveyor belts 501 arranged on the position origin, each conveyor belt 501 is provided with a plurality of storage grooves 502, corresponding materials are placed in each storage groove 502, and the storage grooves 502 sequentially pass through the position origin under the driving of the conveyor belts 501 and pour the materials into the aggregate shell 403 when being turned over.

For example, mica powder, talcum powder and heavy calcium carbonate with the mass ratio of 4:31:15 are respectively placed in advance in a storage tank 502 of synchronous blanking of one conveyor belt 501, when the blanking functional filler is needed, the mica powder, talcum powder and heavy calcium carbonate with the mass ratio of 4:31:15 are simultaneously poured into an aggregate shell 403 positioned at an origin, a stirring roller 405 stirs the material to be changed into a homogeneous material, and after the stirring is completed, the aggregate shell 403 leaves the position origin and continuously and dispersedly blanking around a tank opening, so that the dispersity of the material in slurry is improved.

By the preparation method and the preparation device of the mineral wool board inorganic coating, the absorption and the capture of volatile organic amine and inorganic ammonia generated by raw material decomposition in the mineral wool board due to the water in the coating entering the inside in the spraying and high-temperature drying processes can be realized; meanwhile, the inorganic coating has the performances of sound absorption, noise reduction and formaldehyde removal, and has the functions of resisting bacteria and mildew, so that the problem of mildew spots on the surface of the mineral wool board in the south area is well solved; the application solves the problem of unstable components through low-speed paint adjustment treatment and dispersed blanking, improves the dispersity of the paint on the premise of the system stirring speed, and ensures that the paint achieves the optimal paint film effect.

The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.

Claims

1. The preparation method of the mineral wool board inorganic coating is characterized by comprising the following steps:

then adding 50% defoamer, stirring for 2-3min;

stirring the water slurry at 80-90 rpm, dropwise adding the inorganic adhesive and the rest 50% of defoamer, and continuously stirring for 10min to obtain a finished product;

the mineral wool board inorganic coating comprises the following components in percentage by weight: 20.15-26.4% of water, 0.1-0.5% of modified sodium bentonite, 0.4-0.8% of dispersing agent A, 0.1-0.3% of dispersing agent B, 0.1-0.3% of organic amine capturing agent, 0.05-0.2% of defoaming agent, 1-10% of titanium dioxide, 1-2% of ammonia gas absorbent, 2-5% of formaldehyde removing agent, 5-8% of mineral fiber, 45-60% of functional filler and 3-8% of inorganic adhesive;

wherein, the inorganic adhesive is potassium silicate and modified nano silica sol according to the mass ratio of 2:1, mixing;

the amine capturing agent consists of benzenesulfonyl chloride and a wetting agent in a mass ratio of 1:0.8-1.2;