CN113683948B

CN113683948B - Production method of anti-wind-crack impact-resistant real stone paint

Info

Publication number: CN113683948B
Application number: CN202110870783.9A
Authority: CN
Inventors: 董云龙
Original assignee: Anhui Zhongyan Coating Co ltd
Current assignee: Anhui Zhongyan Coating Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-10-11
Anticipated expiration: 2041-07-30
Also published as: CN113683948A

Abstract

The invention discloses a production method of a weather-resistant and impact-resistant natural stone paint, which belongs to the technical field of chemical production, wherein the natural stone paint produced by the production method disclosed by the invention is prepared from natural colored sand, has the advantages of good weather resistance, color retention, weather resistance, good flexibility and collision resistance, has good decorative effect and real stone texture, adopts natural stone colored sand to ensure the weather resistance of the natural stone paint, does not need a complex structural form, is constructed according to the general natural stone paint, has good wind crack resistance and impact resistance, meets the use requirements of indoor and outdoor natural stone paints in physicochemical properties, meets the roughness and the use performance of the surface of the natural stone paint, has good wind crack resistance and impact resistance, is suitable for the geographical environments of strong wind, low pressure and wind and sand, has long service life, and solves the application problem that the traditional natural stone paint cannot be applied to regions with windy and sandy climatic environment conditions.

Description

Production method of wind-crack-resistant and impact-resistant stone-like paint

Technical Field

The invention belongs to the technical field of chemical production, and particularly relates to a production method of a wind crack resistant and impact resistant stone-like paint.

Background

The stone-like paint has a decorative effect similar to that of marble and granite. It is mainly made up by using natural stone powder with various colours, and can be used for external wall of building to produce imitation stone effect, so that it is also called liquid stone. The coating has good water resistance, stable coloration, no blushing and no chromatic aberration. However, at present, the real stone paint coating cracks in the northwest areas or plateau areas of strong wind and low pressure in windy weather, the coating becomes loose, and the cracks gradually grow after a long time, so that the service life of the real stone paint is greatly shortened. Wind fractures are the "induced" sites of median reticular fractures. Usually, the induction is performed at one place, and the full disk can be lost. In fact, the common real stone paint can obtain good application effect in plain basins and even mountainous regions, and the wind crack defect is not obvious. However, in the northwest area or plateau area with frequent strong winds, cracking is frequent, the performance looks sharp and is changed into a chicken-rib-type appearance wall decoration material. The reason is that the products on the market do not have good wind crack and impact resistance, and related technologies and production processes are not available. The general stone-like paint has not been solved properly because of the wind crack of tearing form caused by stress concentration. Along with the improvement of the decoration requirements of people on internal and external wall coatings, natural real stone paint is increasingly popular with people due to the unique appearance and performance, and the real stone paint which is similar to the appearance of natural stone materials such as natural granite, marble and the like is proposed in a plurality of high-grade houses, courtyards and even high-rise buildings, and is required to have stronger hardness, water resistance, aging resistance and the like in the aspect of performance. Chinese patent CN206873814U discloses a paint block of an anti-cracking real stone paint, which realizes anti-cracking through a structure, the paint positioning layer and the first glass fiber net realize reliable connection between the paint surface layer and the substrate layer, and the integral molding among the second glass fiber net, the paint positioning layer and the back paint layer realizes reliable connection between the back paint layer, but the structure and the process are complex, the cost is higher, and the applicability is not strong. The development of a production method of a wind crack and impact resistant real stone paint is urgently needed by the technical personnel in the field.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a production method of a wind-crack-resistant and impact-resistant real stone paint.

The invention is realized by the following technical scheme:

a production method of a wind-crack-resistant and impact-resistant real stone paint comprises the following steps:

the method comprises the following steps of firstly, surface treatment of colored sand: feeding the color sand into a drum mixer, adding a cross-linking agent, and discharging after the treatment is finished;

further, the dispersant in the first step is a mixture of bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide and bis- [ gamma- (triethoxysilyl) propyl ] -disulfide in a weight ratio of 2: 1, the rotating speed of a rotary drum mixer in the first step is 15-20r/min, the rotating speed of a forced stirring paddle is 800-950r/min, and the cross-linking agent accounts for 2-3% of the color sand.

Si-69, si-75, also called: a-1289, Z-6940 and the like, which have silane active terminals and active sulfur, can perform surface treatment on the colored sand and simultaneously have active sulfur capable of performing a crosslinking function.

Step two, preparation of blended paint slurry: adding neoprene latex into a kneader, adding the polyurethane acrylate emulsion, and uniformly mixing;

the blending has the dual advantages of both neoprene latex and polyurethane, namely water resistance, permeability resistance, aging resistance, no toxicity, strong base layer deformation resistance and the like, and is cold work construction with convenient operation. The solubility parameters are close, the impact is buffered by the damping effect, and the wind crack resistance is improved;

step three, mixing the paint slurry: and uniformly mixing the blended paint slurry, the propylene glycol phenyl ether, the accelerator, the defoamer, the dispersant and the treated color sand drum mixer to obtain the wind crack resistant and impact resistant stone-like paint.

The discourse, weilinggong records that "the worker wants to improve his or her performance, and must first benefit his or her device. The V-shaped drum mixer is used for surface treatment and paint mixing, so that gravity settling is avoided, the mixing effect can be greatly improved, and a curved baffle is additionally arranged on the inner wall of the mixing chamber to guide materials to move from one end of the mixing chamber to the other end of the mixing chamber during rotation of the mixing chamber, so that the possibility of mutual contact of the materials is increased.

And further, uniformly mixing the colored sand in the third step with a drum mixer according to the weight ratio of 10-20 meshes of snowflake white sand to 20-40 meshes of marble to 40: 20-40 meshes of quartz sand to 40-80 meshes of 80: 40-80 meshes of ocular iron ore to 5: 80-120 meshes of floor yellow 2, wherein the rotating speed of the drum mixer is 15-20r/min, and the rotating speed of a forced stirring paddle is 800-950r/min.

Actually, the color sand used in the invention is natural compound color sand, which is mixed by different grading particle sizes. The stone-like paint sand with different grain sizes and reasonable grading can be mutually supplemented to avoid the stress concentration in the gaps during spraying or coating. But does not achieve good application effect in practical application. In the past, people widely use a high-speed mixer to mix in the preparation of coatings, but the real stone paint sand with different particle sizes can be settled due to the gravity, the expected target of gradation is contradictory, more gaps caused by uneven particle size distribution are formed, and the wind crack resistance and impact resistance are greatly reduced, so that the method is suitable for the contrary.

Further, the weight proportion of the polychloroprene latex in the step is 15-20%, the rotation speed of a main shaft of a kneading machine is 20-25r/min, the auxiliary shaft of the kneading machine is 10-15r/min, the steam pressure is 0.4-0.45MPa, and the kneading time is 5-10 minutes.

The V-blender is composed of two cylinders welded together in a V-shape, the shape of the container being asymmetrical with respect to the axis. The powder and granular material are continuously and repeatedly alternated, divided and combined in the inclined cylinder due to the rotary motion. The materials are randomly transferred from one area to another area, meanwhile, the sand particles slide to be overlapped for a plurality of times in space, and the sand particles are continuously distributed on the newly generated surface, so that the shearing and the diffusion movement are repeatedly carried out, and the uniform mixing is really achieved, but not the uneven distribution of the grading particle size caused by gravity sedimentation only through rotation.

Furthermore, the dispersant in the third step is a mixture of zinc stearate and triethanolamine in a weight ratio of 2: 1.

The dispersant, zinc stearate and triethanolamine can also be used as an active agent for latex, can be directly added into the latex, can neutralize the acidity of pottery clay, increases the air tightness and tear resistance of products, and has the function of the dispersant.

Further, the defoaming agent in the third step is one of an organic silicon defoaming agent TEGO 825 and an organic silicon defoaming agent TEGO 8030.

Further, the accelerator in the third step is one or more of ethylene thiourea, N' -diethyl thiourea, sodium isopropoxide, trimethyl thiourea and acetaldehyde ammonia (1-aminoethanol).

And further, the third step is that the paint slurry is mixed by weight parts of 150 to 250, 5 to 15 parts of propylene glycol phenyl ether, 3 to 5 parts of an accelerator, 1 to 3 parts of a defoaming agent, 7 to 9 parts of a dispersing agent and 1000 to 1100 parts of processed color sand.

The polyurethane emulsion is prepared by assembling a reaction kettle, a stirrer and a heating pot, adding n-butyl alcohol into the reaction kettle, heating to 95 ℃, dissolving 0.2-0.5 phr of benzoyl peroxide into a mixed solution of 34-41phr of methyl methacrylate, 15-24phr of hydroxyethyl acrylate, 5-10phr of acrylic acid, 12-14phr of butyl acrylate and 0.5-2phr of dodecyl mercaptan, dropwise adding the mixed solution into a flask, dropwise adding the mixed solution for 2-4h, controlling the temperature to be 95 ℃, dropwise adding the mixed solution, keeping the temperature for 0.5-1h, cooling to below 60 ℃, dropwise adding a partial solvent under reduced pressure, dropwise adding 15-12 parts of isophorone diisocyanate, uniformly stirring, standing for 20-30min, adding triethylamine, adjusting the pH value to 7.5-8.0, adding water, and diluting to a solid content of 20-25%, thus obtaining the polyurethane acrylate emulsion.

Further, the neoprene latex is cationic neoprene latex with the pH value of 11-12, the solid content of 48-50% and the latex particle size of 50-190 mm, and the solid content of the polyurethane acrylate emulsion is 20-25%.

The mixed paint slurry has good air tightness, water resistance, adhesion, weather resistance, chemical resistance and other performances, and avoids the penetration of wind and air to a certain extent.

One of the technical keys of the preparation method of the impact-resistant interpenetrating network anticorrosive coating is that neoprene latex and polyurethane acrylate emulsion are utilized, neoprene components and polyurethane have similar solubility parameters and similar polarities, and can be matched with each other and mutually promoted, the surface interface energy of the colored sand is reduced because the surface of the colored sand is modified by a cross-linking agent, and the cross-linking agent can promote the neoprene latex to be cross-linked with the polyurethane acrylate emulsion to form a uniform cross-linked network structure, so that the coating has higher impact strength and good comprehensive performance of wind crack resistance.

The invention has the beneficial effects that:

the invention uses neoprene latex and polyurethane acrylate emulsion to blend, and treats the surface of color sand through cross-linking agent, wherein neoprene particles play a role of stress concentration point, the existence of neoprene elastic phase enables the stressed material to generate deformation processes, energy absorption during fracture can be obviously improved, cross-linked glassy polymer can be increased to yield by a shearing mechanism, fatigue damage and cracking of real stone paint under long-time strong wind blow can be prevented, and expansion and extension of tiny cracks can be inhibited. Particularly, on the basis of the second-size stacking, the effect of adding specularite is increased on the basis, the specularite is probably derived from a lamellar structure of the specularite, a grid is formed among the gravels, the filler and the matrix resin are combined into a whole through an interface area, the stress is transmitted through the grid, a complete bonding surface is provided, the stress can be uniformly transmitted, a color sand interface subjected to surface treatment by the cross-linking agent is subjected to surface treatment, crack expansion is prevented and stress concentration is slowed down under the organic cooperation of polyurethane acrylate and neoprene, namely, a relaxation effect is achieved, and the effects of impact resistance, large wind blowing resistance and wind cracking resistance are further achieved.

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

the stone-like paint disclosed by the invention has a good decorative effect, has the texture of stone-like color sand, is good in weather resistance, ensures the weather-resistant effect of the stone-like paint, does not need a complex structural form, is constructed according to the general stone-like paint, has good anti-cracking and impact-resistant properties, meets the requirements of water resistance, acid resistance, good adhesive force and hard and impact-resistant coating film on the aspect of physical and chemical properties, meets the rough texture and the service performance of the surface of the stone-like paint, has good anti-cracking and impact-resistant properties, is suitable for being used in geographical environments with strong wind, low pressure and wind sand, and has a long service life.

Detailed Description

The invention is illustrated by the following specific examples, which are not intended to be limiting.

Example 1

Firstly, surface treatment of colored sand: sending the color sand into a drum mixer, adding a cross-linking agent, discharging after the treatment is finished, wherein the dispersant in the first step is prepared by uniformly mixing a mixture of bis- [ gamma- (triethoxysilicacid) propyl ] tetrasulfide and bis- [ gamma- (triethoxysilicacid) propyl ] -disulfide with the weight ratio of 2: 1, the rotating speed of the drum mixer is 20r/min, the rotating speed of a forced stirring paddle is 950r/min, the weight ratio of the cross-linking agent to the color sand is 3%, the weight ratio of the color sand to snowflake white sand of 10 to 20 to 40 to marble of 40 to quartz sand of 80 to 40 to 80 to iron ore of 5 to 80 to 120-mesh floor yellow 2 by the drum mixer; secondly, preparing the blended mill base: adding neoprene latex into a kneader, adding polyurethane acrylate emulsion, and uniformly mixing, wherein the weight proportion of the neoprene latex in the polyurethane acrylate emulsion is 20%, the rotating speed of a main shaft of the kneader is 25r/min, the auxiliary shaft of the kneader is 15r/min, the steam pressure is 0.45MPa, and the kneading time is 10 minutes; and finally, mixing the paint slurry: uniformly mixing the blended paint slurry, propylene glycol phenyl ether, an accelerant, an antifoaming agent, a dispersing agent and a treated color sand drum mixer, wherein the rotating speed of the drum mixer is 20r/min, the rotating speed of a forced stirring paddle is 950r/min, so as to obtain the wind crack resistant and impact resistant real stone paint, wherein the blended paint slurry comprises 250 parts by weight of the blended paint slurry, 15 parts by weight of the propylene glycol phenyl ether, 5 parts by weight of an accelerant ethylene thiourea, 5 parts by weight of the accelerant, 3 parts by weight of the antifoaming agent, 9 parts by weight of the dispersing agent and 1100 parts by weight of treated color sand, the dispersing agent is a mixture of zinc stearate and triethanolamine in a weight ratio of 2: 1, the antifoaming agent is an organic silicon antifoaming agent TEGO neoprene latex which is long-life CRL50LK cation neoprene latex, the pH value of which is 11, the solid content of which is 48%, the particle size of the latex is 50-190 mm, and the solid content of the polyurethane acrylate emulsion is 20%. The polyurethane emulsion is characterized in that a reaction kettle, a stirrer and a heating pot are assembled, n-butanol is added into the reaction kettle and heated to 95 ℃, then 0.5phr of benzoyl peroxide is dissolved in a mixed solution of 41phr of methyl methacrylate, 24phr of hydroxyethyl acrylate, 10phr of acrylic acid, 14phr of butyl acrylate and 2phr of dodecanethiol, the mixed solution is dripped into a flask for 4 hours, the temperature is controlled to 95 ℃, the temperature is kept for 1 hour and reduced to below 60 ℃, partial solvent is removed by dripping thermal decompression, 12 parts of isophorone diisocyanate are dripped, the mixed solution is stirred uniformly and then stands for 30 minutes, triethylamine is added, the pH value is adjusted to 8.0, the mixed solution is diluted to 20% of solid content by adding water, and XH-5008H with the weight of the water is added, so that the polyurethane acrylate emulsion is obtained. Snow white sand Susonggao river, silicou quartz sand Fengyang Temple, floor Huanghu Beibei Tieshan, xuanlang Marble sand Anqingsha, and Wuhu Dengchang specularite.

The product performance is as follows: no caking is generated after stirring in a container, the paint is in a uniform state and is not difficult to spray in construction, after 3 times of tests of freeze-thaw cycle storage stability of the paint, no caking, agglomeration and composition change exist, after 1 month of test of paint thermal storage stability, no caking, mildewing, agglomeration and composition change exist, the initial drying and wind crack resistance time (surface drying) is short, and no cracks exist within 3 hours; the water-resistant 96h coating has no bulging, cracking and peeling, compared with the part which is not soaked, the color is allowed to slightly change, the alkali-resistant 96h coating has no bulging, cracking and peeling, compared with the part which is not soaked, the color is slightly changed; the impact-resistant coating has no cracks, peeling and obvious deformation; the standard state of the bonding strength is 0.74MPa, and the standard state is 0.58MPa after soaking; the coating with the artificial aging resistance of 500h has no bulging, cracking and peeling, the powdering is 0 grade, and the color change is less than 1 grade.

Example 2

Firstly, surface treatment of colored sand: feeding color sand into a drum mixer, adding a cross-linking agent, discharging after treatment is finished, wherein the dispersant in the first step is a mixture of bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide and bis- [ gamma- (triethoxysilyl) propyl ] -disulfide with the weight ratio of 2: 1, the rotating speed of the drum mixer is 15r/min, the rotating speed of a stirring paddle is forced to be 800r/min, the weight ratio of the cross-linking agent to the color sand is 2%, the color sand is 10 to 20 meshes of snowflake white sand, 20 to 20 meshes of marble, 40 to 20 meshes of marble, 80 to 40 meshes of quartz sand, 80 to 40 to 80 meshes of iron ocular ore, 5 to 80 to 120 meshes of floor yellow 2, and the mixture is uniformly mixed through the drum mixer, wherein the rotating speed of the drum mixer is 15r/min, and the rotating speed of the stirring paddle is forced to be 800r/min; secondly, preparing blended mill base: adding neoprene latex into a kneader, adding polyurethane acrylate emulsion, and uniformly mixing, wherein the weight proportion of the neoprene latex in the polyurethane acrylate emulsion is 15%, the rotating speed of a main shaft of the kneader is 20r/min, the auxiliary shaft of the kneader is 10r/min, the steam pressure is 0.4MPa, and the kneading time is 5 minutes; thirdly, mixing the paint slurry: uniformly mixing the blended paint paste, propylene glycol phenyl ether, an accelerator, an antifoaming agent, a dispersing agent and a treated color sand drum mixer to obtain the wind-crack-resistant and impact-resistant real stone paint, wherein the blended paint paste comprises 150 parts by weight, 5 parts by weight, 1000 parts by weight of accelerator N, N' -diethylthiourea, sodium isopropoxide, trimethylthiourea and acetaldehyde ammonia (1-aminoethanol), the dispersing agent comprises a mixture 3 of zinc stearate and triethanolamine in a weight ratio of 2: 1, the antifoaming agent is an organic silicon antifoaming agent TEGO 8030, neoprene latex is CRL50 cation neoprene latex with a pH value of 12, the solid content of 50%, the latex particle size is 50-190 mm, and the solid content of the polyurethane acrylate emulsion is 25%.

The polyurethane emulsion is characterized in that a reaction kettle, a stirrer and a heating pot are assembled, n-butanol is added into the reaction kettle and heated to 95 ℃, then 0.2phr of benzoyl peroxide is dissolved in a mixed solution of 34phr of methyl methacrylate, 15phr of hydroxyethyl acrylate, 5phr of acrylic acid, 12phr of butyl acrylate and 0.5phr of dodecanethiol, the mixed solution is dripped into a flask, the dripping time is 2, the temperature is controlled to be 95 ℃, the temperature is kept for 0.5H and reduced to be below 60 ℃ after the dripping is finished, partial solvent is removed by dripping thermal decompression, 12 parts of isophorone diisocyanate are dripped, the mixed solution is stirred uniformly and then stands for 20min, triethylamine is added, the pH value is adjusted to 8.0, water is added to dilute the mixed solution to 25%, and XH-5008H with the weight of 0.02% of water is added to obtain the polyurethane acrylate emulsion. Snow white sand dorong Liao river, silica valley quartz sand Fengyang Temple, floor Huanghu Beibei Tieshan, xuanlang Marble sand Anqingshao, and WU lake Mian Chang specularite.

The product performance is as follows: no caking is generated after stirring in a container, the paint is in a uniform state and is not difficult to spray in construction, after 3 times of tests of freeze-thaw cycle storage stability of the paint, no caking, agglomeration and composition change exist, after 1 month of test of paint thermal storage stability, no caking, mildewing, agglomeration and composition change exist, the initial drying and wind crack resistance time (surface drying) is short, and no cracks exist within 3 hours; the water resistance of the coating is 96h, the coating does not bulge, crack or peel, and the color is allowed to slightly change compared with the part which is not soaked; the alkali-resistant 96h coating has no bulging, cracking and peeling, and the color is slightly changed compared with the part which is not soaked; the impact-resistant coating has no cracks, peeling and obvious deformation; bonding strength: standard state 0.71MPa, 0.53MPa after soaking; the artificial aging resistance coating of 500h has no bulging, cracking and peeling, powdering is 0 grade, and the color change is less than 1 grade.

Note: with reference to low-temperature storage stability, a main coating sample is put into a 1L glass container (130 mm in height, 110mm in diameter and 0.23mm in wall thickness) to a position of 110mm in height, sealed and then put into a low-temperature box at-5 ℃ for 18h, and taken out and then placed for 6h at 23 ℃; after the operation is circulated for 3 times, the container cover is opened, the internal sample is stirred lightly, and the sample is free from agglomeration and composition change; heat storage stability Primary coating test specimens were loaded into the test tubesStandard low temperature storage stability in the same container, to a height of 110 mm. Sealing, placing in a constant temperature box at 50 deg.C, taking out after 1 month, opening container cover, stirring the internal sample lightly, wherein the sample should not have agglomeration, mildew, coagulation and composition change; the wind crack resistance device consists of a fan, a wind tunnel and a test rack, wherein the cross section of the wind tunnel is 16m ² A square shape; using a fan capable of obtaining wind speed of more than 10m/s to supply air, controlling the wind speed to be 12m/s, and measuring the air flow speed in the wind tunnel by using a hot bulb type or other anemometers; the drying time is carried out according to the specification of a surface dry method B in the GB/T1728-1979 paint film and putty film drying time measuring method standard, and the test is carried out for 1 time at 1h interval; the water resistance is determined according to the rule of the A method in the GB/T1733-1993 standard for the permanent resistance determination of paint films, and the test plate is immersed in tertiary water as defined in the GB/T6682-1992 standard for laboratory water specification and test method. After the test is finished, taking out the test plate, and slightly sucking water attached to the plate surface by using filter paper; after standing in a standard environment for 3 hours, the surface state was observed. Two test plates in the three test plates have no bulging, cracking and stripping, and the color is allowed to slightly change compared with the part which is not soaked; the alkali resistance is determined according to the GB/T9265-1988 rules for determining the alkali resistance of the architectural coating; after the test is finished, taking out the test board, carefully cleaning the board surface with water, slightly sucking the water attached to the board surface with filter paper, placing the test board in a standard environment for 3H, observing the surface state, wherein two test boards in three test boards have no bulging, cracking and peeling, and the color is allowed to slightly change compared with the part which is not soaked; and (3) coating the surface of the test plate with the base coating, the main coating and the surface coating which are sequentially used according to the amount specified in the product specification in the impact resistance manner, and curing in a standard environment for 14d. The test piece is tightly attached to standard sand with the thickness of 20mm, then a spherical weight with the diameter of 50mm and the weight of 530g freely falls from the position with the height of 300mm, and three positions with the distance of 50mm are selected on a test plate; the surface of the test plate is observed by naked eyes, and no crack, peeling and obvious deformation exist; coating the surface of the test panel with the base coating, the main coating and the surface coating which have the temperature change resistance according to the dosage specified in the product specification in sequence, maintaining for 14d in a standard environment, and performing according to the specification of JG/T25-1999 architectural coating freeze-thaw cycle resistance performance measurement method, wherein at least two test panels are required in the three test panelsThe test plate has no chalking, cracking, peeling, bulging and obvious color change; placing the bonding strength test metal frame on a mortar block with the size of 70mm multiplied by 20mm under a standard state, filling the main coating into the frame (the area is 40mm multiplied by 40 mm), leveling the surface by using a scraper, immediately removing the frame to obtain a test plate, and maintaining for 14d in a standard environment; this test was performed in groups of 5 panels. On the tenth day of the maintenance period, the test plate is placed in a horizontal state, epoxy resin 101 adhesive is used for uniformly coating the surface of the test sample, a steel upper clamp is placed on the test plate, and a 1kg weight is added; removing the adhesive overflowing around, standing for 72h, removing weights, maintaining for 14d, measuring the maximum tensile strength, namely the bonding strength after soaking, on a tensile testing machine according to the method of GB/T9779-1988 multilayer building coating, along the vertical direction of the surface of a test piece, measuring the maximum tensile strength at a tensile speed of 5mm/min, manufacturing 5 test plates at the same time, maintaining for 14d, horizontally placing the test piece on standard requirements of a test method for testing the strength of standard sand GB/T17671-1999 cement mortar at the bottom of a water tank, then injecting water to the position 5mm away from the surface of a mortar block, standing for 10d, taking out, placing the side of the test piece downwards, drying for 24h in a constant temperature box at 50 ℃, placing in a standard environment for 24h, and measuring the bonding strength after soaking.

Claims

1. The production method of the anti-wind-crack and impact-resistant real stone paint is characterized by comprising the following steps of:

step one, surface treatment of colored sand: feeding the color sand into a drum mixer, adding a cross-linking agent, discharging after treatment, wherein the cross-linking agent is a mixture of bis- [ gamma- (triethoxysilicon) propyl ] tetrasulfide and bis- [ gamma- (triethoxysilicon) propyl ] -disulfide in a weight ratio of 1: 1, the rotating speed of the drum mixer is 15-20r/min, the rotating speed of a forced stirring paddle is 800-950r/min, and the cross-linking agent accounts for 0.2-0.5% of the color sand; step two, preparation of blended paint slurry: adding neoprene latex into a kneader, adding polyurethane acrylate emulsion, and uniformly mixing, wherein the neoprene latex is cationic neoprene latex with the pH value of 11-12, the solid content of 48-50% and the latex particle size of 50-190 mm, and the solid content of the polyurethane acrylate emulsion is 20-25%; step three, mixing the paint slurry: uniformly mixing the mixed paint slurry, propylene glycol phenyl ether, an accelerator, a defoaming agent, a dispersing agent and a treated color sand drum mixer, wherein the accelerator in the third step is one or more of ethylene thiourea, N' -diethyl thiourea, trimethyl thiourea and acetaldehyde ammonia (1-aminoethanol), the mixed paint slurry is 150 to 250, the propylene glycol phenyl ether is 5 to 15, the accelerator is 3 to 5, the defoaming agent is 1 to 3, the dispersing agent is 7 to 9, and the treated color sand is 1000 to 1100, the color sand in the third step is prepared by uniformly mixing 10 to 20-mesh snow white sand 20 to 40-mesh quartz sand 40, 80-eyepiece quartz sand, 80 to 120-mesh floor yellow according to the weight ratio of 20: 40: 80: 5: 2 through the drum mixer, wherein the rotating speed of the drum mixer is 15 to 20-mesh marble, the rotating speed of a forced stirring paddle is 800 to 9520-mesh, and the weather-crack resistant and impact resistant real paint is obtained.

2. The production method of the wind crack and impact resistant really stone paint as claimed in claim 1, wherein the weight proportion of the neoprene latex in the step is 15 to 20 percent of the polyurethane acrylate emulsion, the rotation speed of a main shaft of the kneader is 20 to 25r/min, the rotation speed of a secondary shaft of the kneader is 10 to 15r/min, the steam pressure is 0.4 to 0.45MPa, and the kneading time is 5 to 10 minutes.

3. The method for producing the wind crack and impact resistant real stone paint as claimed in claim 1, wherein the dispersant in the third step is a mixture of zinc stearate and triethanolamine in a weight ratio of 2: 1, and the defoamer in the third step is one of silicone defoamer TEGO 825 and silicone defoamer TEGO 8030.