CN114395330A - Preparation method of high-humidity-adhesion liquid granite coating - Google Patents

Abstract

The invention discloses a high-humidity attached liquid granite coating, which relates to the field of preparation of water-based coatings, and comprises the following components in percentage by mass: 10-20% of protective glue solution, 8-15% of emulsion, 0.5-1% of cross-linking agent, 62-80% of dispersed phase (color point), 1-1.5% of surfactant, 0.5-1% of initiator, 0.5-1% of accelerator, 0.5-1% of softening agent, 0.5-1% of special resin, 0.5-1% of rheological additive, 0.5-1% of magnesium oxide, 0.5-1% of water-based isocyanate and 2-4% of separant; 62-80% of dispersed phase (color point) is prepared by the following raw materials according to the percentage: 5-12% of water, 0.5-0.8% of wetting dispersant, 1-1.5% of mildew-proof preservative, 0.5-1.2% of defoaming agent, 2-3% of antifreezing agent, 1-1.5% of film-forming assistant, 1-1.5% of pH regulator, 2-5% of calcined kaolin, 3-7% of coarse whiting, 2-5% of titanium pigment, 2-4% of cellulose, 2-4% of protective glue solution and 40-55% of sand. The invention has the beneficial effects that: by adding the cross-linking agent into the liquid granite coating, the dispersion medium forms secondary cross-linking so as to improve the compactness of a paint film, and the paint film of the granite coating still has high wet adhesion under the condition of rain wash.

Description

Preparation method of high-humidity-adhesion liquid granite coating

Technical Field

The invention relates to the field of preparation of water-based coatings, in particular to a preparation method of a high-humidity-adhesion liquid granite coating. The liquid granite coating provided by the invention can be used in the field of architectural decoration, has scratch resistance similar to a paint film plate due to high-humidity adhesion, and has a vivid effect of imitating natural granite.

Background

Along with the increase of the implementation force of the national low-carbon and environment-friendly policy and the decrease of the mining force of natural stones, the market urgently needs to develop liquid granite coating with vivid stone imitation effect to reduce the building load. Liquid granite paint is a kind of paint with the effect of imitating granite, and is a kind of heterogeneous mixture paint, which generally consists of dispersed phase (color point) and dispersed medium (protective glue solution and emulsion). Through the rapid iteration and development of the technology in the last 10 years, the liquid granite coating has been changed from an oil-based coating to a water-based coating. In addition, after the liquid granite coating is constructed and dried, the liquid granite coating has extremely high granite simulation degree, and is a high-end coating with excellent market prospect;

most of the liquid granite coating at the present stage is water-based coating, and after construction and drying, although the coating has extremely high granite imitation effect, the coating has the defects of reduced adhesive force, easy scraping and dropping and no granite scraping resistance effect after being washed by rainwater. Therefore, it is necessary to develop a liquid granite coating with high moisture adhesion, which can make the granite imitation effect of the liquid granite coating more realistic.

However, a high-humidity-adhesion liquid granite coating is lacked at the present stage, and the technical difficulty of analysis mainly comprises the following two aspects: (1) the high-humidity adhesion means that the adhesion degree between dispersed phases is increased, and construction needs to be considered; (2) secondary crosslinking occurs in a dispersion medium of the high-humidity adhesion liquid granite coating, which poses a great challenge to the storage stability of the final finished product;

therefore, the development of a liquid granite coating with high humidity adhesion and stable and excellent performance is a technical barrier.

Disclosure of Invention

The invention aims to provide a preparation method of a high-humidity-adhesion liquid granite coating, which solves the problems in the process.

In order to achieve the purpose, the invention provides the following technical scheme: the high-humidity-adhesion liquid granite coating consists of the following components in percentage by mass: 10-20% of protective glue solution, 8-15% of emulsion, 0.5-1% of cross-linking agent, 62-80% of dispersed phase (color point), 1-1.5% of surfactant, 0.5-1% of initiator, 0.5-1% of accelerator, 0.5-1% of softening agent, 0.5-1% of special resin, 0.5-1% of rheological additive, 0.5-1% of magnesium oxide, 0.5-1% of water-based isocyanate and 2-4% of separant;

62-80% of the dispersed phase (color point) is prepared from the following raw materials in percentage by weight: 5-12% of water, 0.5-0.8% of wetting dispersant, 1-1.5% of mildew-proof preservative, 0.5-1.2% of defoaming agent, 2-3% of antifreezing agent, 1-1.5% of film-forming assistant, 1-1.5% of pH regulator, 2-5% of calcined kaolin, 3-7% of coarse whiting, 2-5% of titanium pigment, 2-4% of cellulose, 2-4% of protective glue solution and 40-55% of sand.

Preferably, the cross-linking agent is one or a mixture of more of Jiangmen Kangyu chemical RA-27, Jiangmen Kangyu chemical RA-11, Nanjing Needu new material ADP-W454 and Nanjing Needu new material ADP-W450.

Preferably, the siloxane in the crosslinker hydrolyzes to silanol which is not only self-crosslinkable but also bonds to latex particles in the emulsion by hydrogen bonding, thereby increasing the overall compactness of the paint film, preventing moisture intrusion, and imparting high moisture adhesion to the paint film.

Preferably, the initiator is selected from any one or a combination of more of the following: acyl peroxides, hydroperoxides, dialkyl peroxides, ketone peroxides, and ester peroxides; the accelerator is selected from any one or a combination of more of the following: acetylacetone, triphenylphosphine, n-butyraldehyde-aniline condensate, and p-chlorobenzoic acid; the softening agent is selected from any one or combination of more of the following: polyethylene, organic silicon resin, acid anhydride or ketene, epoxy derivative, polyethylene resin emulsion and the like.

Preferably, the flow aid, i.e. thickener, is selected from water-soluble, water-emulsifiable polymer or polyurethane thickener; the aqueous isocyanate is selected from any one or a combination of more of the following: toluene diisocyanate, diphenylmethane and diisocyanate; the isolating agent is a mixture of lithium magnesium silicate and sodium pyrophosphate.

Preferably, the mildew-proof preservative is selected from any one or a combination of more of the following: chloramine, sodium salt benzimidazole, organic sulfur and quinone compounds, inorganic salt systems, and the like; the film forming agent is selected from any one or combination of more of the following: acrylic resin, polyurethane copolymer resin, polyethylene, acrylate modified butadiene resin and polyurethane modified nitrocellulose film forming agent, wherein the antifreezing agent is selected from any one or more of the following combinations: formamide, calcium chloride, sodium acetate, alkylamine, fatty acid amide, organic acid ester, alkyl succinimide, dihydric alcohol and amide.

A preparation method of a high-humidity-adhesion liquid granite coating comprises the following steps:

s1, preparation of dispersed phase (color point): adding a certain amount of water into a stirring barrel, sequentially adding a wetting dispersant, a mildew-proof preservative, a defoaming agent, calcined kaolin, coarse whiting, titanium pigment, cellulose and a pH regulator, slowly stirring for 10-20min at 400 revolutions per minute of 300-;

s2, adding an antifreezing agent, a film forming aid, an emulsion, a protective glue solution and sand into the primary mixed solution, stirring at 600-800 rpm for 10-20min to prepare a dispersion phase, and correspondingly toning the dispersion phase according to the granite hue proportion to obtain a final dispersion phase color point;

s3, granulating: sequentially adding color points with prepared colors into the protective glue solution, precutting to a certain degree, then granulating by a dispersion disc, stopping granulating when the size of the color points is about the size of the color points in the granite, and preparing a granulating mixed solution;

s4, adding a certain amount of water into a reaction kettle, heating the water to 70-80 ℃, adding the special resin, the rheological additive, the magnesium oxide, the water-based isocyanate and the separant, stirring for 20-30min, cooling after stirring is finished, and preparing a reaction solution A;

s5, adding the granulation mixed solution and the reaction solution A into a stirring barrel, and stirring at 400-600 rpm for 10-20min to prepare a premixed solution;

s6, sequentially adding the emulsion and the cross-linking agent into the pre-mixed solution, and stirring at 600-800 r/min for 10-20min to prepare a coating mixed solution;

s7, transferring and adding a surfactant, an initiator, an accelerator and a softening agent into the coating mixed solution, and stirring at the speed of 400-600 revolutions/min for 30-40min to prepare the liquid granite coating.

Compared with the prior art, the invention has the beneficial effects that: by adding the cross-linking agent into the liquid granite coating, the dispersion medium forms secondary cross-linking so as to improve the compactness of a paint film, and the paint film still has high wet adhesion and strong scraping resistance under the condition that the granite coating is washed by rainwater. Because the secondary crosslinking technology improves the crosslinking density among the dispersion media and the hydrophobicity brought by the crosslinking agent, the prepared liquid granite coating has better water resistance compared with the common exterior wall coating, and a paint film does not turn white and bubble and fall off after being boiled in water for one hour. By adding the surfactant, the wetting agent, the film-forming agent, the promoter and the softening agent into the liquid granite coating, the adhesion strength of the coating is improved, the coating has good aesthetic property, good wear resistance and difficult shedding; by adding aluminum chloride into the liquid granite coating, the oxidation resistance of the coating is improved, the application range of the liquid granite coating is wide, and the quality of the liquid granite coating is greatly improved. The liquid granite coating of the invention can not generate the phenomena of bubbling, cracking, peeling, powder falling, obvious color change, obvious light loss and the like in the practical use, and can not generate the phenomenon of color loss or outer layer falling after being washed by rainwater.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: the high-humidity-adhesion liquid granite coating consists of the following components in percentage by mass: 10-20% of protective glue solution, 8-15% of emulsion, 0.5-1% of cross-linking agent, 62-80% of dispersed phase (color point), 1-1.5% of surfactant, 0.5-1% of initiator, 0.5-1% of accelerator, 0.5-1% of softening agent, 0.5-1% of special resin, 0.5-1% of rheological additive, 0.5-1% of magnesium oxide, 0.5-1% of water-based isocyanate and 2-4% of separant;

62-80% of the dispersed phase (color point) is prepared from the following raw materials in percentage by weight: 5-12% of water, 0.5-0.8% of wetting dispersant, 1-1.5% of mildew-proof preservative, 0.5-1.2% of defoaming agent, 2-3% of antifreezing agent, 1-1.5% of film-forming assistant, 1-1.5% of pH regulator, 2-5% of calcined kaolin, 3-7% of coarse whiting, 2-5% of titanium pigment, 2-4% of cellulose, 2-4% of protective glue solution and 40-55% of sand.

Preferably, the cross-linking agent is one or a mixture of more of Jiangmen Kangyu chemical RA-27, Jiangmen Kangyu chemical RA-11, Nanjing Needu new material ADP-W454 and Nanjing Needu new material ADP-W450.

Preferably, the siloxane in the crosslinker hydrolyzes to silanol which is not only self-crosslinkable but also bonds to latex particles in the emulsion by hydrogen bonding, thereby increasing the overall compactness of the paint film, preventing moisture intrusion, and imparting high moisture adhesion to the paint film.

Preferably, the initiator is selected from any one or a combination of more of the following: acyl peroxides, hydroperoxides, dialkyl peroxides, ketone peroxides, and ester peroxides; the accelerator is selected from any one or a combination of more of the following: acetylacetone, triphenylphosphine, n-butyraldehyde-aniline condensate, and p-chlorobenzoic acid; the softening agent is selected from any one or combination of more of the following: polyethylene, organic silicon resin, acid anhydride or ketene, epoxy derivative, polyethylene resin emulsion and the like.

Preferably, the flow aid, i.e. thickener, is selected from water-soluble, water-emulsifiable polymer or polyurethane thickener; the aqueous isocyanate is selected from any one or a combination of more of the following: toluene diisocyanate, diphenylmethane and diisocyanate; the isolating agent is a mixture of lithium magnesium silicate and sodium pyrophosphate.

Preferably, the mildew-proof preservative is selected from any one or a combination of more of the following: chloramine, sodium salt benzimidazole, organic sulfur and quinone compounds, inorganic salt systems, and the like; the film forming agent is selected from any one or combination of more of the following: acrylic resin, polyurethane copolymer resin, polyethylene, acrylate modified butadiene resin and polyurethane modified nitrocellulose film forming agent, wherein the antifreezing agent is selected from any one or more of the following combinations: formamide, calcium chloride, sodium acetate, alkylamine, fatty acid amide, organic acid ester, alkyl succinimide, dihydric alcohol and amide.

Example 1

The high-humidity-adhesion liquid granite coating consists of the following components in percentage by mass: 10% of protective glue solution, 10% of emulsion, 0.5% of cross-linking agent, 70.5% of dispersed phase (color point), 1.5% of surfactant, 0.5% of initiator, 0.5% of accelerator, 1% of softening agent, 0.5% of special resin, 0.5% of rheological additive, 0.5% of magnesium oxide, 1% of water-based isocyanate and 3% of separant;

70.5 percent of dispersed phase (color point) is prepared by the following raw materials according to percentage: 10% of water, 0.5% of wetting dispersant, 1% of mildew-proof preservative, 1% of defoaming agent, 2% of antifreezing agent, 1% of film-forming auxiliary agent, 1% of pH regulator, 3% of calcined kaolin, 4% of coarse whiting, 3% of titanium pigment, 3% of cellulose, 2% of protective glue solution and 40% of sand.

Wherein the wetting dispersant is SN5040 of Nopochaceae; the mass ratio of the mildew-proof preservative to the preservative is 2: 1, a mixture of dragon sand PROXEL CMC and dragon sand PROXEL 160; the defoaming agent is a glacier A10; the antifreeze is glycol, Xiamenxin is continuously sent; the film-forming assistant is dodecanol ester, Texnol Istmann; the pH regulator is chemical ammonia water of juong; the calcined kaolin is simon 1000 mesh kaolin; the triple superphosphate is 1000 meshes triple superphosphate; the titanium dioxide is Bailey linked BLR-699; the cellulose is a mixture of 250HBR and 250HBR in a mass ratio of 1: 4; emulsion is Baolijia 9381; the protective glue solution is a Pickering chemical S482 solution with the mass fraction of 5 percent; the sand is Shanghai double-moistening chemical 80-120 mesh texture sand.

A preparation method of a high-humidity-adhesion liquid granite coating comprises the following steps:

s1, preparation of dispersed phase (color point): adding a certain amount of water into a stirring barrel, sequentially adding a wetting dispersant, a mildew-proof preservative, a defoaming agent, calcined kaolin, coarse whiting, titanium pigment, cellulose and a pH regulator, slowly stirring for 10-20min at 400 revolutions per minute of 300-;

s2, adding an antifreezing agent, a film forming aid, an emulsion, a protective glue solution and sand into the primary mixed solution, stirring at 600-800 rpm for 10-20min to prepare a dispersion phase, and correspondingly toning the dispersion phase according to the granite hue proportion to obtain a final dispersion phase color point;

s3, granulating: sequentially adding color points with prepared colors into the protective glue solution, precutting to a certain degree, then granulating by a dispersion disc, stopping granulating when the size of the color points is about the size of the color points in the granite, and preparing a granulating mixed solution;

s4, adding a certain amount of water into a reaction kettle, heating the water to 70-80 ℃, adding the special resin, the rheological additive, the magnesium oxide, the water-based isocyanate and the separant, stirring for 20-30min, cooling after stirring is finished, and preparing a reaction solution A;

s5, adding the granulation mixed solution and the reaction solution A into a stirring barrel, and stirring at 400-600 rpm for 10-20min to prepare a premixed solution;

s6, sequentially adding the emulsion and the cross-linking agent into the pre-mixed solution, and stirring at 600-800 r/min for 10-20min to prepare a coating mixed solution;

s7, transferring and adding a surfactant, an initiator, an accelerator and a softening agent into the coating mixed solution, and stirring at the speed of 400-600 revolutions/min for 30-40min to prepare the liquid granite coating.

Example 2

The high-humidity-adhesion liquid granite coating consists of the following components in percentage by mass: 10% of protective glue solution, 9% of emulsion, 1% of cross-linking agent, 70.5% of dispersed phase (color point), 1.5% of surfactant, 0.5% of initiator, 1% of accelerator, 1% of softener, 1% of special resin, 0.5% of rheological additive, 1% of magnesium oxide, 1% of water-based isocyanate and 2% of separant;

70.5 percent of dispersed phase (color point) is prepared by the following raw materials according to percentage: 10% of water, 0.5% of wetting dispersant, 1% of mildew-proof preservative, 1% of defoaming agent, 2% of antifreezing agent, 1% of film-forming auxiliary agent, 1% of pH regulator, 3% of calcined kaolin, 4% of coarse whiting, 3% of titanium pigment, 3% of cellulose, 2% of protective glue solution and 40% of sand.

Wherein the wetting dispersant is SN5040 of Nopochaceae; the mass ratio of the mildew-proof preservative to the preservative is 2: 1, a mixture of dragon sand PROXEL CMC and dragon sand PROXEL 160; the defoaming agent is a glacier A10; the antifreeze is glycol, Xiamenxin is continuously sent; the film-forming assistant is dodecanol ester, Texnol Istmann; the pH regulator is chemical ammonia water of juong; the calcined kaolin is simon 1000 mesh kaolin; the triple superphosphate is 1000 meshes triple superphosphate; the titanium dioxide is Bailey linked BLR-699; the cellulose is a mixture of 250HBR and 250HBR in a mass ratio of 1: 4; emulsion is Baolijia 9381; the protective glue solution is a Pickering chemical S482 solution with the mass fraction of 5 percent; the sand is Shanghai double-moistening chemical 80-120 mesh texture sand.

A preparation method of a high-humidity-adhesion liquid granite coating comprises the following steps:

s1, preparation of dispersed phase (color point): adding a certain amount of water into a stirring barrel, sequentially adding a wetting dispersant, a mildew-proof preservative, a defoaming agent, calcined kaolin, coarse whiting, titanium pigment, cellulose and a pH regulator, slowly stirring for 10-20min at 400 revolutions per minute of 300-;

s2, adding an antifreezing agent, a film forming aid, an emulsion, a protective glue solution and sand into the primary mixed solution, stirring at 600-800 rpm for 10-20min to prepare a dispersion phase, and correspondingly toning the dispersion phase according to the granite hue proportion to obtain a final dispersion phase color point;

s3, granulating: sequentially adding color points with prepared colors into the protective glue solution, precutting to a certain degree, then granulating by a dispersion disc, stopping granulating when the size of the color points is about the size of the color points in the granite, and preparing a granulating mixed solution;

s4, adding a certain amount of water into a reaction kettle, heating the water to 70-80 ℃, adding the special resin, the rheological additive, the magnesium oxide, the water-based isocyanate and the separant, stirring for 20-30min, cooling after stirring is finished, and preparing a reaction solution A;

s5, adding the granulation mixed solution and the reaction solution A into a stirring barrel, and stirring at 400-600 rpm for 10-20min to prepare a premixed solution;

s6, sequentially adding the emulsion and the cross-linking agent into the pre-mixed solution, and stirring at 600-800 r/min for 10-20min to prepare a coating mixed solution;

s7, transferring and adding a surfactant, an initiator, an accelerator and a softening agent into the coating mixed solution, and stirring at the speed of 400-600 revolutions/min for 30-40min to prepare the liquid granite coating.

Example 3

The high-humidity-adhesion liquid granite coating consists of the following components in percentage by mass: 10.5% of protective glue solution, 8% of emulsion, 1% of cross-linking agent, 70.5% of dispersed phase (color point), 1.5% of surfactant, 1% of initiator, 1% of accelerator, 1% of softening agent, 1% of special resin, 0.5% of rheological additive, 1% of magnesium oxide, 1% of water-based isocyanate and 2% of separant;

70.5 percent of dispersed phase (color point) is prepared by the following raw materials according to percentage: 10% of water, 0.5% of wetting dispersant, 1% of mildew-proof preservative, 1% of defoaming agent, 2% of antifreezing agent, 1% of film-forming auxiliary agent, 1% of pH regulator, 3% of calcined kaolin, 4% of coarse whiting, 3% of titanium pigment, 3% of cellulose, 2% of protective glue solution and 40% of sand.

Wherein the wetting dispersant is SN5040 of Nopochaceae; the mass ratio of the mildew-proof preservative to the preservative is 2: 1, a mixture of dragon sand PROXEL CMC and dragon sand PROXEL 160; the defoaming agent is a glacier A10; the antifreeze is glycol, Xiamenxin is continuously sent; the film-forming assistant is dodecanol ester, Texnol Istmann; the pH regulator is chemical ammonia water of juong; the calcined kaolin is simon 1000 mesh kaolin; the triple superphosphate is 1000 meshes triple superphosphate; the titanium dioxide is Bailey linked BLR-699; the cellulose is a mixture of 250HBR and 250HBR in a mass ratio of 1: 4; emulsion is Baolijia 9381; the protective glue solution is a Pickering chemical S482 solution with the mass fraction of 5 percent; the sand is Shanghai double-moistening chemical 80-120 mesh texture sand.

A preparation method of a high-humidity-adhesion liquid granite coating comprises the following steps:

s1, preparation of dispersed phase (color point): adding a certain amount of water into a stirring barrel, sequentially adding a wetting dispersant, a mildew-proof preservative, a defoaming agent, calcined kaolin, coarse whiting, titanium pigment, cellulose and a pH regulator, slowly stirring for 10-20min at 400 revolutions per minute of 300-;

s2, adding an antifreezing agent, a film forming aid, an emulsion, a protective glue solution and sand into the primary mixed solution, stirring at 600-800 rpm for 10-20min to prepare a dispersion phase, and correspondingly toning the dispersion phase according to the granite hue proportion to obtain a final dispersion phase color point;

s3, granulating: sequentially adding color points with prepared colors into the protective glue solution, precutting to a certain degree, then granulating by a dispersion disc, stopping granulating when the size of the color points is about the size of the color points in the granite, and preparing a granulating mixed solution;

s4, adding a certain amount of water into a reaction kettle, heating the water to 70-80 ℃, adding the special resin, the rheological additive, the magnesium oxide, the water-based isocyanate and the separant, stirring for 20-30min, cooling after stirring is finished, and preparing a reaction solution A;

s5, adding the granulation mixed solution and the reaction solution A into a stirring barrel, and stirring at 400-600 rpm for 10-20min to prepare a premixed solution;

s6, sequentially adding the emulsion and the cross-linking agent into the pre-mixed solution, and stirring at 600-800 r/min for 10-20min to prepare a coating mixed solution;

s7, transferring and adding a surfactant, an initiator, an accelerator and a softening agent into the coating mixed solution, and stirring at the speed of 400-600 revolutions/min for 30-40min to prepare the liquid granite coating.

Test data:

the performance of examples 1, 2 and 3 is characterized according to the technical requirements of the external inelastic water-based multicolor architectural coating from HG/T4343-:

HG/T4343-2012 requires:

HJ2537-2014 requires:

extreme performance testing:

a, placing the paint film in boiling water at 100 ℃ for stewing for one hour, and observing the apparent state of the paint film.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The high-humidity-adhesion liquid granite coating consists of the following components in percentage by mass: 10-20% of protective glue solution, 8-15% of emulsion, 0.5-1% of cross-linking agent, 62-80% of dispersed phase (color point), 1-1.5% of surfactant, 0.5-1% of initiator, 0.5-1% of accelerator, 0.5-1% of softening agent, 0.5-1% of special resin, 0.5-1% of rheological additive, 0.5-1% of magnesium oxide, 0.5-1% of water-based isocyanate and 2-4% of separant;

62-80% of the dispersed phase (color point) is prepared from the following raw materials in percentage by weight: 5-12% of water, 0.5-0.8% of wetting dispersant, 1-1.5% of mildew-proof preservative, 0.5-1.2% of defoaming agent, 2-3% of antifreezing agent, 1-1.5% of film-forming assistant, 1-1.5% of pH regulator, 2-5% of calcined kaolin, 3-7% of coarse whiting, 2-5% of titanium pigment, 2-4% of cellulose, 2-4% of protective glue solution and 40-55% of sand.

2. The high moisture adhesion liquid granite coating of claim 1 where: the cross-linking agent is one or a mixture of more of Jiangmen Kangyu chemical RA-27, Jiangmen Kangyu chemical RA-11, Nanjing Needu new material ADP-W454 and Nanjing Needu new material ADP-W450.

3. The high moisture adhesion liquid granite coating of claim 1 where: siloxane in the cross-linking agent can be hydrolyzed into silanol which can be self-crosslinked and can be bonded with latex particles in emulsion by generating hydrogen bond action, so that the overall compactness of a paint film is improved, the invasion of moisture is prevented, and the paint film is endowed with high-humidity adhesion.

4. The high moisture adhesion liquid granite coating of claim 1 where: the initiator is selected from any one or a combination of more of the following: acyl peroxides, hydroperoxides, dialkyl peroxides, ketone peroxides, and ester peroxides; the accelerator is selected from any one or a combination of more of the following: acetylacetone, triphenylphosphine, n-butyraldehyde-aniline condensate, and p-chlorobenzoic acid; the softening agent is selected from any one or combination of more of the following: polyethylene, organic silicon resin, acid anhydride or ketene, epoxy derivative, polyethylene resin emulsion and the like.

5. The high moisture adhesion liquid granite coating of claim 1 where: the flow auxiliary agent is a thickening agent and is selected from water-soluble and water-emulsified polymer or polyurethane thickening agent; the aqueous isocyanate is selected from any one or a combination of more of the following: toluene diisocyanate, diphenylmethane and diisocyanate; the isolating agent is a mixture of lithium magnesium silicate and sodium pyrophosphate.

6. The high moisture adhesion liquid granite coating of claim 1 where: the mildew-proof preservative is selected from any one or more of the following combinations: chloramine, sodium salt benzimidazole, organic sulfur and quinone compounds, inorganic salt systems, and the like; the film forming agent is selected from any one or combination of more of the following: acrylic resin, polyurethane copolymer resin, polyethylene, acrylate modified butadiene resin and polyurethane modified nitrocellulose film forming agent, wherein the antifreezing agent is selected from any one or more of the following combinations: formamide, calcium chloride, sodium acetate, alkylamine, fatty acid amide, organic acid ester, alkyl succinimide, dihydric alcohol and amide.

7. The method of preparing a high wet adhesion liquid granite coating according to any of claims 1-6, characterized in that: the method comprises the following steps:

s1, preparation of dispersed phase (color point): adding a certain amount of water into a stirring barrel, sequentially adding a wetting dispersant, a mildew-proof preservative, a defoaming agent, calcined kaolin, coarse whiting, titanium pigment, cellulose and a pH regulator, slowly stirring for 10-20min at 400 revolutions per minute of 300-;

s2, adding an antifreezing agent, a film forming aid, an emulsion, a protective glue solution and sand into the primary mixed solution, stirring at 600-800 rpm for 10-20min to prepare a dispersion phase, and correspondingly toning the dispersion phase according to the granite hue proportion to obtain a final dispersion phase color point;

s3, granulating: sequentially adding color points with prepared colors into the protective glue solution, precutting to a certain degree, then granulating by a dispersion disc, stopping granulating when the size of the color points is about the size of the color points in the granite, and preparing a granulating mixed solution;

s4, adding a certain amount of water into a reaction kettle, heating the water to 70-80 ℃, adding the special resin, the rheological additive, the magnesium oxide, the water-based isocyanate and the separant, stirring for 20-30min, cooling after stirring is finished, and preparing a reaction solution A;

s5, adding the granulation mixed solution and the reaction solution A into a stirring barrel, and stirring at 400-600 rpm for 10-20min to prepare a premixed solution;

s6, sequentially adding the emulsion and the cross-linking agent into the pre-mixed solution, and stirring at 600-800 r/min for 10-20min to prepare a coating mixed solution;

s7, transferring and adding a surfactant, an initiator, an accelerator and a softening agent into the coating mixed solution, and stirring at the speed of 400-600 revolutions/min for 30-40min to prepare the liquid granite coating.