CN107140874B - Water-based machine-sprayed real stone paint and preparation method thereof - Google Patents

Water-based machine-sprayed real stone paint and preparation method thereof Download PDF

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CN107140874B
CN107140874B CN201710334492.1A CN201710334492A CN107140874B CN 107140874 B CN107140874 B CN 107140874B CN 201710334492 A CN201710334492 A CN 201710334492A CN 107140874 B CN107140874 B CN 107140874B
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water
paint
machine
sprayed
aqueous
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CN107140874A (en
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张亚辉
程永胜
周业宝
罗会启
戴家兵
余建龙
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Lanzhou Scisky Aqueous Polymer Material Co ltd
Hefei Scisky Technology Co ltd
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Lanzhou Scisky Aqueous Polymer Material Co ltd
Hefei Scisky Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/04Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/06Acrylates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482Coating or impregnation materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/54Substitutes for natural stone, artistic materials or the like
    • C04B2111/542Artificial natural stone
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention provides a water-based machine-sprayed real stone paint and a preparation method thereof, wherein the water-based machine-sprayed real stone paint comprises the following raw material components in percentage by weight: 10-20% of water-based acrylic resin; 1-5% of water-based cosolvent; 1-5% of polyacrylamide aqueous solution; 0.1 to 2 percent of hydroxyethyl cellulose; 0.01 to 2 percent of water-based defoaming agent; 60-80% of colored sand; 0.1-2% of aqueous thickening rheological agent; 0.01-2% of pH regulator; the balance of deionized water. The water-based exterior wall machine-sprayed stone paint obtained by the invention is suitable for full-automatic paint spraying machines and semi-automatic screw pump paint spraying machines, the atomization effect and the surface quality sensibility of machine-spraying construction are good, the color and the board moving speed can be adjusted according to the thickness required by a coating, the paint is soaked in water for 144 hours after being sprayed with finish paint, the water-white resistance of the initial paint film is good, the requirements of safety, environmental protection and energy conservation are met, the human health is facilitated, the spraying efficiency is high, the cost is low, and the water-based exterior wall machine-sprayed stone paint is suitable for industrial.

Description

Water-based machine-sprayed real stone paint and preparation method thereof
Technical Field
The invention relates to the field of real stone paint, and particularly discloses aqueous machine-spraying real stone paint and a preparation method thereof.
Background
The stone-like paint has decorative effect similar to marble and granite, and is also called as liquid stone multicolor paint. The natural stone imitation finish paint is specially used for finishing the texture effect of the building outer wall, can be used for decorating the outer wall at present, and has vivid stone imitation effect and obvious cost advantage compared with marble and granite. And the stone-like paint adopts natural colored sand as a raw material, has good weather resistance, high hardness and no color change. Has become the mainstream product of exterior wall decoration.
In the current domestic real stone paint market, the absolute main force of the whole real stone paint is occupied by the construction on the engineering site, and the defects of the real stone paint are increasingly highlighted along with the large-area construction and the large-scale field construction of the real stone paint engineering. The JG/T24-2000 has lower industrial standard threshold and more disordered market. The construction spraying is easy to fly sand, so that the loss is serious, and the loss is about one third of the construction amount in unit area when the loss is high. Moreover, due to different construction methods of constructors, the decoration effect of the stone paint directly influences the later development of the stone paint. The problems can be well solved by using the water-based exterior wall machine real stone paint spraying integrated plate.
The popularization rate of the machine-sprayed real stone paint for the water-based exterior walls in the current market is not high, and the quality of automatic spraying equipment is also different; how to design a real stone paint formula which can adapt to different automatic spraying equipment is very important. Because the raw material of the stone-like paint is single, the variety of the stone-like paint is not many. Based on the reasons, compared with the common exterior wall real stone paint, the waterborne exterior wall real stone paint has higher formula design requirements, and can not only ensure the characteristics of the original real stone paint in the aspects of drying time, hardness, weather resistance, initial water-white resistance, color retention and the like, but also meet the spraying construction requirements of different automatic spraying machine equipment (how to ensure the board walking speed and the sufficient atomization effect of the real stone paint per se, and ensure the consistency of the sprayed integrated board effect and color). Because the real stone paint system contains about 70-80% of colored sand, the specific gravity of the colored sand is about 1.7-2. The traditional stone-like paint formula needs a large amount of hydroxyethyl cellulose with high molecular weight to ensure the anti-settling of the color sand in the system. The characteristics of the real stone paint system lead to poor atomization effect and low stability of the water-based real stone paint.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the water-based machine-spraying real stone paint and the preparation method thereof.
In order to achieve the above objects and other objects, the present invention includes the following technical solutions: the water-based machine-sprayed real stone paint is characterized by comprising the following raw material components in percentage by weight:
preferably, the machine-sprayed real stone paint comprises the following raw material components in percentage by weight:
more preferably, the machine-sprayed real stone paint consists of the following raw material components in percentage by weight:
preferably, the machine-spraying real stone paint further comprises magnesium aluminum silicate powder, and the weight ratio of the magnesium aluminum silicate powder to the water-based acrylic resin is (0.1-7): (10-20). The magnesium silicate aluminum powder plays a role of a rheological aid, and is dispersed, broken and diluted, so that the real stone paint has high fluidity and good surface wettability.
Preferably, the waterborne acrylic resin is waterborne polyurethane modified waterborne acrylic resin, and the solid content of the waterborne acrylic resin is 44-52%.
More preferably, the waterborne acrylic resin manufacturer is Badfu, the solid content of the waterborne acrylic resin is 48-50%, the molecular weight range is 30000-50000, the viscosity is not more than 80MPa/s, and the waterborne acrylic resin has the advantages of excellent weather resistance, initial water resistance and high construction tolerance.
Preferably, the mass fraction of the polyacrylamide aqueous solution is 0.1-0.7%, and the molecular weight of polyacrylamide in the polyacrylamide aqueous solution is 200-300 ten thousand.
More preferably, the polyacrylamide aqueous solution is prepared by uniformly mixing analytically pure polyacrylamide and deionized water, and the temperature of the deionized water is preferably 30-45 ℃ in the preparation process.
Preferably, the aqueous thickening rheology is a low-alkali hydrophobic alkali swelling thickening rheology.
More preferably, the aqueous thickening rheology is of the Dow corporation of America DR-77.
Preferably, the defoaming agent is selected from any one or more of silicone, mineral oil and polyether modified defoaming agent.
More preferably, the mineral oil modified defoamer is of type DF-877 or DF-840; the polyether modified defoaming agent has the model of L-61, BX-106107108 or DS-2001.
Preferably, the aqueous co-solvent is an alcohol ester solvent. The water-based cosolvent is added to improve the construction atomization property and the low-temperature film-forming property of the water-based acrylic resin.
More preferably, the aqueous cosolvent is selected from any one or more of propylene glycol, glycerol, propylene glycol methyl ether acetate and 2,2, 4-trimethyl-1, 3 pentanediol monoisobutyrate.
More preferably, the aqueous cosolvent consists of TEX and propylene glycol in a weight ratio (0.5-1.5): (0.5-1.5) mixing. TEX is an ester alcohol film forming aid of Istmann, has the characteristic of slow volatilization, and can increase the low-temperature film forming property, color development property and storage stability of the real stone paint by adding the TEX.
Preferably, the hydroxyethyl cellulose is hydrophobically modified associative hydroxyethyl cellulose. The hydroxyethyl cellulose has good effects of preventing the coating from cracking, improving the water retention, improving the production stability and the construction convenience, increasing the strength, enhancing the adhesive force to the surface and the like. Hydroxyethyl cellulose has a higher water retention capacity than other celluloses. And the flowing property and the protective colloid property of the cellulose are far better than those of other celluloses.
More preferably, the hydroxyethyl cellulose is selected from craine HS30000 hydroxyethyl cellulose or HS100000 hydroxyethyl cellulose.
Preferably, the pH adjusting aid is an alkaline regulator, and preferably an amine pH adjusting aid is used.
More preferably, the type of the pH adjusting aid is AMP-95 or HX-6130.
Preferably, the colored sand is selected from natural colored stone sand produced in Hebei.
Preferably, the colored sand is prepared from 40-80 meshes of colored sand and 80-120 meshes of colored sand according to the weight ratio (2.5-3.2): (0.8-1.2) mixing. The machine-spraying real stone paint takes 40-80 meshes as the main mesh number to support the thickness of the coating and the spraying smoothness.
In another aspect, the invention also discloses a method for preparing the aqueous machine-spraying real stone paint, which comprises the following steps:
1) the method is carried out by adopting the following A mode or B mode:
A. under the stirring condition of 600r/min 400-;
B. under the stirring condition of 600r/min 400-;
2) reducing the stirring speed to 600r/min, sequentially adding the polyacrylamide aqueous solution, the water-based cosolvent and the water-based acrylic resin according to the weight percentage, increasing the stirring speed to 1200r/min, and uniformly stirring;
3) and reducing the stirring speed to 400-600r/min, sequentially adding the aqueous thickening rheological agent and the colored sand according to the weight percentage, and uniformly stirring to obtain the aqueous mechanical spraying stone paint.
In conclusion, the invention provides the water-based machine-spraying real stone paint and the preparation method thereof, and the water-based machine-spraying real stone paint has the following beneficial effects:
the water-based exterior wall machine-sprayed stone paint is suitable for full-automatic paint sprayers and semi-automatic screw pump paint sprayers, has good atomization effect and surface quality sensibility in machine-spraying construction, can adjust the color and the board moving speed according to the thickness required by a coating, has no abnormity when being immersed in water for 144 hours after finishing paint is sprayed for 12 hours, has good water-white resistance at the initial stage of a paint film, meets the requirements of safety, environmental protection and energy conservation, is beneficial to human health, has high spraying efficiency and low cost, and is suitable for industrial production.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
The Pigment Volume Concentration (PVC) of the formula design of the invention is about 60-80%. Because the content of the colored sand is high and the shape is irregular, the dried real stone paint is generally higher than the Critical Pigment Volume Concentration (CPVC) under the condition of certain particle size distribution. The real stone paint is difficult to form a complete and compact special net structure system. Therefore, how to fully use the aqueous acrylic emulsion and the rheological additives (such as cellulose, magnesium aluminum silicate powder and Polyacrylamide (PAM)) in the formula is very important for the construction of mechanical spray real stone paint, uniform film formation and initial water whitening resistance. For a real stone paint system, the selection of the emulsion is related to the key performances of weather resistance, initial water-white resistance and the like of the product. The selection and application of the rheological additive play a key role in the construction of the real stone paint.
The waterborne polyurethane modified waterborne acrylic emulsion has excellent permeability and weather resistance, and the formed film is clear and has high gloss. The waterborne exterior wall machine spray paint prepared by the waterborne polyurethane modified waterborne acrylic resin has the advantages of good comprehensive performance, high strength, good weather resistance, easy construction, good impact resistance and good initial water-white resistance, and can be completely suitable for full-automatic and semi-automatic spray paint machines.
The type and the dosage of the cellulose are determined according to the dosage of the modified acrylic emulsion and the dosage of the colored sand. Because this kind of real mineral varnish mainly adopts machine to spout the construction. Cellulose is required to ensure product storage and consider the smoothness of machine spraying construction. The addition amount of the cellulose is 0.1-2%, preferably, the addition amount of the cellulose is 0.1-0.5%, and more preferably, the addition amount of the cellulose is 0.1-0.2%. And the cellulose needs to be added slowly with stirring. The cellulose selected by the invention is any one of hydroxyethyl cellulose, and the type is Kelaien HS 30000.
The aluminum magnesium silicate has a unique three-dimensional chain structure and a special needle and rod crystal structure, so that the aluminum magnesium silicate has unusual colloid and adsorption properties. The coating has excellent thickening property, suspension property and colloid shaking-melting property and is widely applied to the coating industry. The paint mainly plays a role of an anti-settling thickener in the stone-like paint. The adding amount of the magnesium aluminum silicate is 0.1-7%, and the adding amount of the magnesium aluminum silicate is 3-5% more preferably;
PAM mainly plays a role in reducing frictional resistance between liquids and thickening, and the addition of PAM aqueous solution enables the real stone paint to have the advantages of smooth gun spraying, easy construction and wet surface. The dosage of PAM needs to be strictly controlled. The weight adding amount of the PAM aqueous solution with the mass fraction of 0.1-0.7% is 1-5%, more preferably, polyacrylamide is analytical pure with the molecular weight of 300 ten thousand, and the weight adding amount of the PAM aqueous solution with the weight fraction of 0.2% is 1-2%.
The technical solution of the present invention will be described below with reference to specific examples.
Table 1 shows the ratios of the raw material components in examples 1 to 7, and the contents of the raw material components in the table are in parts by weight.
TABLE 1 weight ratios of the raw material components in examples 1 to 7
In Table 1, the aqueous cosolvent is a mixture of TEX and propylene glycol in a weight ratio of 1: 1; the color sand is prepared from 40-80 meshes of north river color sand and 80-120 meshes of north river color sand according to the weight ratio of 3: 1 are mixed.
Example 1
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 13.95kg of deionized water is put into a stirring cylinder, 0.15kg of hydroxyethyl cellulose (HS30000) is slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, stirring is carried out for 6min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and stirring is carried out for 7 min;
2) reducing the stirring speed to 400r/min, adding 1.5kg of polyacrylamide aqueous solution with the weight fraction of 0.2%, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfu RS-706), then increasing the stirring speed to 1000r/min, and stirring for 15 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.15kg of aqueous thickening rheological agent (DR50) and 70kg of colored sand, and stirring for 10min to obtain the aqueous machine-sprayed real stone paint.
Example 2
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 14kg of deionized water is put into a stirring cylinder, 0.1kg of hydroxyethyl cellulose (HS100000) is slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, stirring is carried out for 6min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and stirring is carried out for 7 min;
2) reducing the stirring speed to 400r/min, adding 1.5kg of polyacrylamide aqueous solution with the weight fraction of 0.2%, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfei RS-706), then increasing the stirring speed to 1000r/min, and stirring for 20 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.15kg of aqueous thickening rheological agent (DR50), 0.1kg of bactericide (isothiazolinone) and 70kg of colored sand, and stirring for 13min to obtain the aqueous machine-sprayed real stone paint.
Example 3
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 10.95kg of deionized water is put into a stirring cylinder, 0.15kg of hydroxyethyl cellulose (HS30000) and 3kg of magnesium aluminum silicate powder (ATT40) are slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, the stirring is carried out for 5min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and the stirring is carried out for 8 min;
2) reducing the stirring speed to 400r/min, adding 1.5kg of polyacrylamide aqueous solution with the weight fraction of 0.2%, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfu RS-706), then increasing the stirring speed to 1000r/min, and stirring for 15 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.15kg of aqueous thickening rheological agent (DR50), 0.1kg of bactericide (isothiazolinone) and 70kg of colored sand, and stirring for 13min to obtain the aqueous machine-sprayed real stone paint.
Example 4
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 11kg of deionized water is put into a stirring cylinder, 0.1kg of hydroxyethyl cellulose (HS100000) and 3kg of magnesium aluminum silicate powder (ATT40) are slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, the stirring is carried out for 5min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and the stirring is carried out for 7 min;
2) reducing the stirring speed to 400r/min, adding 1.5kg of polyacrylamide aqueous solution with the weight fraction of 0.2%, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfu RS-706), then increasing the stirring speed to 1000r/min, and stirring for 15 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.15kg of aqueous thickening rheological agent (DR50), 0.1kg of bactericide (isothiazolinone) and 70kg of colored sand, and stirring for 12min to obtain the aqueous machine-sprayed real stone paint.
Example 5
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 5.6kg of deionized water is put into a stirring cylinder, 0.15kg of hydroxyethyl cellulose (HS30000) and 5kg of magnesium aluminum silicate powder (ATT40) are slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, stirring is carried out for 6min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and stirring is carried out for 8 min;
2) reducing the stirring speed to 400r/min, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfu RS-706), then increasing the stirring speed to 1000r/min, and stirring for 20 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.1kg of bactericide (isothiazolinone) and 75kg of colored sand, and stirring for 12min to obtain the water-based mechanical spray stone paint.
Example 6
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 5.6kg of deionized water is put into a stirring cylinder, 0.15kg of hydroxyethyl cellulose (HS100000) and 5kg of magnesium aluminum silicate powder (ATT40) are slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, stirring is carried out for 6min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and stirring is carried out for 8 min;
2) reducing the stirring speed to 400r/min, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfu RS-706), then increasing the stirring speed to 1000r/min, and stirring for 20 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.1kg of bactericide (isothiazolinone) and 75kg of colored sand, and stirring for 12min to obtain the water-based mechanical spray stone paint.
Example 7
A preparation method of machine-sprayed real stone paint comprises the following steps:
1) under the stirring condition of 400r/min, 10.45kg of deionized water is put into a stirring cylinder, 0.3kg of hydroxyethyl cellulose (HS30000) is slowly added, 0.05kg of aqueous defoaming agent (NXZ) is added, the stirring speed is increased to 700r/min, the stirring is carried out for 5min, 0.1kg of pH regulator (AMP-95) is added, the stirring speed is increased to 1000r/min, and the stirring is carried out for 8 min;
2) reducing the stirring speed to 400r/min, then adding 1.5kg of aqueous cosolvent, then adding 12.5kg of aqueous acrylic resin (Badfu RS-706), then increasing the stirring speed to 1000r/min, and stirring for 12 min;
3) and reducing the stirring speed to 400r/min, sequentially adding 0.1kg of bactericide (isothiazolinone) and 75kg of colored sand, and stirring for 12min to obtain the water-based mechanical spray stone paint.
The result of the detection
The waterborne machine-sprayed stone paint obtained in examples 1 to 7 was sprayed by a full-automatic paint sprayer or a semi-automatic screw pump paint sprayer, and then the performance of the waterborne machine-sprayed stone paint was tested according to JG/T24-2000 synthetic resin emulsion sand wall building paint, and the test results are shown in Table 2.
Table 2 results of performance test of aqueous machine spray real stone paint obtained in examples 1 to 4
Table 3 results of performance test of aqueous machine spray real stone paint obtained in examples 5 to 7
As can be seen from the performance test results of the machine-sprayed real stone paint obtained in the examples 1 to 7 in the tables 2 and 3, the pH values of the machine-sprayed real stone paint obtained in the examples 1 to 7 are between 8 and 9, and all the pH values meet the detection standard. The paint in the tank has no big difference after being stirred evenly. From the water resistance test results, example 7 had the worst water resistance, followed by a slight change in color after drying in example 4. Other embodiments provide substantially no change in color after the coating dries out. Meanwhile, the cellulose has strong water absorption, and the use of the cellulose is a key factor influencing the water resistance of the stone-like paint. Example 7 dried slower than the other embodiments, where the water retention of the cellulose was the primary reason.
The workability in tables 2 and 3 is critical to the present invention and also to the effect of aqueous machine-spray stone paint. From the viewpoints of the continuity of the machine-spraying walking plate, the atomization effect and the machine-spraying surface effect, the comprehensive score of example 3 is the highest, and the phenomenon of gun breakage occurs to different degrees in other embodiments. This is also a key factor affecting the surface effect of the machine spray and the speed of the board. The initial water resistance and the high and low temperature color difference of the example 3 have the highest comprehensive score. That is, the present invention is fully consistent with the implementation on the fully automatic and semi-automatic paint spraying machine in view of the comprehensive score of the construction performance and the use condition of the client.
In conclusion, the waterborne machine-spraying stone-like paint prepared by the invention overcomes the defects of poor atomization of machine spraying, gun breaking of spraying and the like, and sprayed bulk materials can be recycled. The negative effects brought by rainy weather are avoided in the indoor construction. The efficiency of real mineral varnish is spouted to waterborne machine has been improved greatly, saves artifical spraying cost. The spraying atomization is good, the effect of the integrated board surface is uniform, the spraying atomization method is safe, environment-friendly and energy-saving, the cost of raw materials is low, the raw materials are easy to obtain, and the spraying atomization method is very suitable for large-scale industrial production. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.

Claims (5)

1. The water-based machine-sprayed real stone paint is characterized by being used for a full-automatic paint sprayer and a semi-automatic screw pump paint sprayer, and comprising the following raw material components in percentage by weight, wherein the sum of the raw material components is 100%, and the raw material components comprise the following components in percentage by weight:
wherein the color sand is prepared from 40-80 mesh color sand and 80-120 mesh color sand according to the weight ratio (2.5-3.2): (0.8-1.2) mixing;
the mass fraction of the polyacrylamide aqueous solution is 0.1-0.7%, and the molecular weight of polyacrylamide in the polyacrylamide aqueous solution is 200-300 ten thousand;
the aqueous cosolvent is prepared from TEXANOL ester alcohol and propylene glycol according to the weight ratio (0.5-1.5): (0.5-1.5) mixing.
2. The aqueous machine-sprayed stone paint of claim 1, wherein: the waterborne acrylic resin is waterborne polyurethane modified waterborne acrylic resin, and the solid content of the waterborne acrylic resin is 44-48%.
3. The aqueous machine-sprayed stone paint of claim 1, wherein: the aqueous thickening rheological agent is a low-alkali hydrophobic alkali swelling thickening rheological agent;
and/or the defoaming agent is selected from any one or more of organic silicon, mineral oil or polyether modified defoaming agent.
4. The aqueous machine-sprayed stone paint of claim 1, wherein: the hydroxyethyl cellulose is hydrophobic modified association type hydroxyethyl cellulose.
5. A method for preparing the aqueous machine-sprayed stone paint according to any one of claims 1 to 4, characterized in that it comprises the following steps:
1) under the stirring condition of 600r/min 400-;
2) reducing the stirring speed to 600r/min, sequentially adding the polyacrylamide aqueous solution, the water-based cosolvent and the water-based acrylic resin according to the weight percentage, increasing the stirring speed to 1200r/min, and uniformly stirring;
3) and reducing the stirring speed to 400-600r/min, sequentially adding the aqueous thickening rheological agent and the colored sand according to the weight percentage, and uniformly stirring to obtain the aqueous mechanical spraying stone paint.
CN201710334492.1A 2017-05-12 2017-05-12 Water-based machine-sprayed real stone paint and preparation method thereof Active CN107140874B (en)

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CN107384087A (en) * 2017-09-22 2017-11-24 苏州振振好新型建材科技有限公司 A kind of nontoxic durable true mineral varnish of fire-resistant waterproof and preparation method thereof
CN108753068B (en) * 2018-06-14 2020-07-28 广州励宝新材料科技有限公司 Water-based relief paint, preparation method thereof and automatic spraying device of water-based relief paint

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