High-efficiency mildew-proof coating and processing technology thereof

Abstract

The scheme belongs to the technical field of paint and provides a kind of high-efficiency mildew-proof paint and its processing technology, including the following components by weight: solvent 25-30 parts; thickening agent A 0.3-0.8 parts; thickening agent B 0.3-0.8 parts; dispersant 0.3-1 part; wetting agent 0.2-0.5 part; filler 30-40 parts; paint emulsion 15-20 parts; leveling agent 0.5-0.8 part; defoaming agent 0.2-0.3 part; mildew-proof fungicide 10-20 parts; self-inhibition mildew-proof agent 3-8 parts; film-forming aid 1-1.5 parts. The scheme utilizes the pH reduction of local area caused by mold metabolites to promote the hydrolysis of borate ester in the self-inhibition mildew-proof agent to produce boric acid, and then utilizes boric acid to inhibit and kill mold.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coatings, in particular to a high-efficiency mildew-proof coating and a processing technology thereof. BACKGROUND

[0002] The phenomenon of coating mildew is an intuitive manifestation of microbial activity and coating performance failure. Mold decomposes carbohydrates and lipids in the coating through glycolysis and tricarboxylic acid cycle to generate organic acids such as acetic acid, citric acid, and oxalic acid, which causes the coating to fall off due to mildew, resulting in a decrease in aesthetic appearance and erosion of the coated substrate. In addition, even if it does not fall off, the mildew spots on the coating surface are not easy to remove, and it still needs to be repainted, causing waste.

[0003] In the prior art, a certain amount of mildew-proof agent is added to the coating, and the coating has excellent adhesion, flame retardance, and improved mildew-proof performance. The components are reasonably proportioned, have strong compatibility, the obtained coating has a long storage period, is environmentally friendly, and can be used in the fields of building decoration, etc. However, the mildew-proof agent is simply added and cannot independently adjust the mildew-proof effect according to the growth characteristics of mold. SUMMARY

[0004] To solve the above problems, the present application provides a high-efficiency mildew-proof coating and a processing technology thereof, which utilizes the pH reduction of local areas caused by mold metabolites to promote the hydrolysis of borate ester in the self-inhibiting mildew-proof agent to generate boric acid, and then utilizes boric acid to inhibit and kill mold.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] The present application provides a high-efficiency mildew-proof coating, which comprises the following components by weight:

[0007] Solvent 25-30 parts;

[0008] Thickening agent A 0.3-0.8 parts;

[0009] Thickening agent B 0.3-0.8 parts

[0010] Dispersant 0.3-1 part;

[0011] Wetting agent 0.2-0.5 parts;

[0012] Filler 30-40 parts;

[0013] Coating emulsion 15-20 parts;

[0014] Leveling agent 0.5-0.8 parts;

[0015] Defoaming agent 0.2-0.3 parts;

[0016] Mildew-proof fungicide 10-20 parts;

[0017] Self-inhibiting mildewcide 3-8 parts;

[0018] Film-forming aid 1-1.5 parts;

[0019] The self-inhibiting mildewcide is prepared by the following steps:

[0020] Step (1): prepare a boric acid aqueous solution with a mass concentration of 5%-20%, add porous material powder in an amount of 10-20 times the mass of the boric acid, stir and concentrate, and then dry to obtain boric acid modified porous material;

[0021] Step (2): add the boric acid modified porous material to ethylene glycol, stir and soak, then heat to 120-130°C under anaerobic conditions, and react for 3-5 hours to obtain the self-inhibiting mildewcide.

[0022] The self-inhibiting mildewcide is prepared by the following steps:

[0023] As a preferred embodiment, the solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersing agent is an anionic surface dispersing agent; the wetting agent is a non-ionic surfactant; the mildewcide is one or more of benzoate preservatives, isothiazolinone bactericides, or sorbate preservatives; the filler is one or more of kaolin powder, calcium carbonate powder, silica powder, and titanium dioxide powder; the leveling agent is a non-ionic leveling agent; the defoaming agent is low-viscosity liquid paraffin or silicone defoaming agent; the thickening agent B is a polyacrylic acid copolymer; the coating emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound.

[0024] As a preferred embodiment, the high-efficiency mildew-resistant coating further comprises 1-2 parts of an antifreeze agent and 0.1-0.2 parts of a pH adjuster; the antifreeze agent is propylene glycol; and the pH adjuster is aminomethyl propanol.

[0025] As a preferred embodiment, in step (1), the porous material is one of zeolite powder, porous carbon powder, porous titanium dioxide powder, and porous silica powder; and the average particle size of the porous material is 1-5 μm.

[0026] As a preferred embodiment, in step (1), the water content after stirring and concentration is 20%-30%.

[0027] As preferred, in step (2), the boric acid modified porous material is added into ethylene glycol, 0.1%-0.5% p-toluenesulfonic acid is added to the mass of the boric acid modified porous material, after stirring and infiltrating, it is heated to 120-130℃ under anaerobic condition, and reacted for 3-5h, after separation, the excess ethylene glycol is removed by distillation under reduced pressure, and the self-inhibiting mildew inhibitor is obtained.

[0028] The present application also provides a processing technology of the high-efficiency mildew-proof coating, and the processing technology comprises the following steps of adding materials according to a proportioning formula.

[0029] Step (a): adding solvent, thickening agent A, dispersant, wetting agent, filler, coating emulsion and mildew-proof and sterilizing agent into a sand mill to mix and grind, and obtaining mixed material A;

[0030] Step (b): adding the remaining materials into the mixed material A, and fully stirring to obtain the high-efficiency mildew-proof coating.

[0031] As preferred, in step (a), the average particle size of the material particles in the mixed material A is less than 10μm.

[0032] As preferred, in step (b), the stirring process of the fully stirring is that first stirring at 800-1000r / min for 30-60min, and then stirring at 300-500r / min for 30-60min.

[0033] Since the present application stores the porous material in borate, the porous material is not suitable to be added in step (a), and adding the porous material into the sand mill in step (a) may cause the porous material to collapse, and the borate is hydrolyzed too early in actual use.

[0034] Compared with the prior art, the present application has the following advantages:

[0035] 1. The high-efficiency mildew-proof coating prepared by the present application adds a self-inhibiting mildew-proof agent on the basis of conventional mildew-proof agents, utilizes the metabolites of the mildew to reduce the pH in local areas, promotes the hydrolysis of the borate in the self-inhibiting mildew-proof agent to generate boric acid, and utilizes the boric acid to inhibit and kill the mildew, so as to achieve the effect of preventing mildew and sterilization, the residual mildew stains are easy to remove, and the prevention and control effect on the mildew can be automatically adjusted according to the growth and metabolism of the mildew.

[0036] 2. The preparation process of the present application is simple and can adapt to mass production. DETAILED DESCRIPTION

[0037] The present application will be described in greater detail by the following specific examples, and other advantages and effects of the present application will be more clearly understood from the description. It will be obvious to a person skilled in the art that this application is by no means limited to the described embodiments and the inclusion of specific embodiments does not imply that these are the only ones that the present application covers. Any further embodiments obtained by a person of ordinary skill in the art from the described embodiments, without creative work, shall fall within the scope of the present application.

[0038] Example 1

[0039] A high-efficiency mildew-proof coating, comprising the following components by weight parts:

[0040] Water 27 parts;

[0041] Thickening agent A hydroxyethyl cellulose 0.5 parts;

[0042] Thickening agent B TT-935(302) 0.5 parts

[0043] Dispersant 5040(402) 0.5 parts;

[0044] Wetting agent 405(102) 0.4 parts;

[0045] Calcined kaolin 20 parts and calcium carbonate powder 15 parts;

[0046] Styrene-acrylic emulsion 17 parts;

[0047] Leveling agent 2020(304) 0.6 parts;

[0048] Defoaming agent A10(301) 0.25 parts;

[0049] Mildew-proof fungicide 998A(206) 15 parts;

[0050] Self-inhibiting mildew-proof agent 5 parts;

[0051] Film-forming aid 202 1.2 parts;

[0052] Antifreeze agent propylene glycol(201) 1.5 parts;

[0053] pH adjuster aminomethyl propanol 0.15 parts;

[0054] The self-inhibiting mildew-proof agent is prepared by the following steps:

[0055] Step (1): prepare a 15% boric acid aqueous solution, add 15 times the mass of porous titanium dioxide powder with an average particle size of 3 μm, stir and concentrate to a water content of 25%, and then dry to obtain boric acid modified porous material;

[0056] Step (2): the borate-modified porous material is added into ethylene glycol, 0.3% of p-toluenesulfonic acid by mass of the borate-modified porous material is added, after stirring and soaking, it is heated to 125°C under anaerobic condition, and reacted for 4 hours. After separation, the excess ethylene glycol is removed by distillation under reduced pressure to obtain the self-inhibiting mildew inhibitor;

[0057] The solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant, commercially available as 5040 (402); the wetting agent is a non-ionic surfactant, commercially available as 405 (102); the mildew-proof and bactericidal agent is a benzoate preservative, commercially available as 998A (206); the leveling agent is a non-ionic leveling agent, commercially available as 2020 (304); the defoaming agent is low-viscosity liquid paraffin, commercially available as 2020 (304); the thickening agent B is a polyacrylic acid copolymer; the coating emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound, commercially available as 202.

[0058] The materials are added according to the proportions, and the above high-efficiency mildew-proof coating is prepared by the following steps:

[0059] Step (a): the solvent, the thickening agent A, the dispersant, the wetting agent, the filler, the coating emulsion, and the mildew-proof and bactericidal agent are added into a sand mill and mixed and ground at a speed of 1200 r / min for 30 min to obtain mixture A; the average particle size of the material particles is less than 10 μm;

[0060] Step (b): the remaining materials are added into the mixture A, first stirred at 1000 r / min for 60 min, and then stirred at 300 r / min for 30 min to obtain the high-efficiency mildew-proof coating.

[0061] Example Two

[0062] A high-efficiency mildew-proof coating comprises the following components in parts by mass:

[0063] Water 30 parts;

[0064] Thickening agent A hydroxyethyl cellulose 0.8 parts;

[0065] Thickening agent B TT-935 (302) 0.8 parts

[0066] Dispersant 5040 (402) 0.9 parts;

[0067] Wetting agent 405 (102) 0.5 parts;

[0068] Calcium carbonate powder 10 parts, silica powder 10 parts, titanium dioxide powder 10 parts;

[0069] Styrene-acrylic emulsion 20 parts;

[0070] Leveling agent 2020 (304) 0.8 parts;

[0071] Antifoaming agent A10 (301) 0.3 parts;

[0072] Mold inhibitor 998A (206) 20 parts;

[0073] Self-inhibiting mold inhibitor 8 parts;

[0074] Film-forming aid 202 1.5 parts;

[0075] Antifreeze agent propylene glycol (201) 2 parts;

[0076] pH adjuster aminomethyl propanol 0.2 parts;

[0077] The self-inhibiting mold inhibitor is prepared by the following steps:

[0078] Step (1): A 20% aqueous solution of boric acid is prepared, and 20 times the mass of zeolite powder with an average particle size of 5 μm is added. After stirring and concentration, the water content is 30%, and the boric acid modified porous material is obtained by drying;

[0079] Step (2): The boric acid modified porous material is added to ethylene glycol, and 0.5% of p-toluenesulfonic acid based on the mass of the boric acid modified porous material is added. After stirring and soaking, it is heated to 130°C under anaerobic conditions for 3 h. After separation, the excess ethylene glycol is removed by distillation under reduced pressure to obtain the self-inhibiting mold inhibitor;

[0080] The solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant, commercially available as type 5040 (402); the wetting agent is a non-ionic surfactant, commercially available as type 405 (102); the mold inhibitor is a benzoate preservative, commercially available as type 998A (206); the leveling agent is a non-ionic leveling agent, commercially available as type 2020 (304); the antifoaming agent is low-viscosity liquid paraffin, commercially available as type 2020 (304); the thickening agent B is a polyacrylic acid copolymer; the paint emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound, commercially available as type 202;

[0081] The above high-efficiency mold-resistant paint is prepared by the following steps after adding the materials in the specified proportions:

[0082] Step (a): The solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, and mold inhibitor are added to a sand mill and mixed and ground at a speed of 1200 r / min for 30 min to obtain mixture A; the average particle size of the material particles is less than 10 μm;

[0083] Step (b): The remaining materials are added to mixture A. First, stirring is carried out at 1000 r / min for 60 min, and then stirring is carried out at 500 r / min for 30 min to obtain the high-efficiency mold-resistant paint.

[0084] Example Three

[0085] A high-efficiency mildew-proof coating, comprising the following components by weight parts:

[0086] Water 26 parts;

[0087] Thickening agent A Hydroxyethyl cellulose 0.4 parts;

[0088] Thickening agent B TT-935(302) 0.4 parts

[0089] Dispersant 5040(402) 0.5 parts;

[0090] Wetting agent 405(102) 0.3 parts;

[0091] Calcined kaolin 10 parts, titanium dioxide powder 10 parts and calcium carbonate powder 15 parts;

[0092] Styrene-acrylic emulsion 15 parts;

[0093] Leveling agent 2020(304) 0.5 parts;

[0094] Defoaming agent A10(301) 0.2 parts;

[0095] Mildew-proof fungicide 998A(206) 10 parts;

[0096] Self-inhibiting mildew-proof agent 3 parts;

[0097] Film-forming aid 202 1 part;

[0098] The self-inhibiting mildew-proof agent is prepared by the following steps:

[0099] Step (1): prepare a boric acid aqueous solution with a mass concentration of 8%, add silica powder with an average particle size of 2 μm at 10 times the mass of boric acid, stir and concentrate, then dry to obtain boric acid modified porous material with a water content of 20%;

[0100] Step (2): add the boric acid modified porous material to ethylene glycol, add p-toluenesulfonic acid at 0.1% of the mass of the boric acid modified porous material, stir and soak, then heat to 120°C under anaerobic conditions for 5 h, separate, and remove excess ethylene glycol by distillation under reduced pressure to obtain the self-inhibiting mildew-proof agent;

[0101] As preferred, the solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant, commercially available as 5040 (402); the wetting agent is a non-ionic surfactant, commercially available as 405 (102); the mildewproof fungicide is a benzoate preservative, commercially available as 998A (206); the leveling agent is a non-ionic leveling agent, commercially available as 2020 (304); the defoaming agent is a low-viscosity liquid paraffin, commercially available as 2020 (304); the thickening agent B is a polyacrylic acid copolymer; the paint emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound, commercially available as 202.

[0102] The materials are added according to the proportions, and the above high-efficiency mildewproof paint is prepared by the following steps:

[0103] Step (a): The solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, and mildewproof fungicide are added to a sand mill and mixed and ground at a speed of 1200 r / min for 30 min to obtain a mixture A; the average particle size of the material particles is less than 10 μm;

[0104] Step (b): The remaining materials are added to the mixture A, first stirred at 800 r / min for 60 min, and then stirred at 400 r / min for 50 min to obtain a high-efficiency mildewproof paint.

[0105] Comparative Example One

[0106] A high-efficiency mildewproof paint includes the following components in parts by weight:

[0107] Water 27 parts;

[0108] Thickening agent A hydroxyethyl cellulose 0.5 parts;

[0109] Thickening agent B TT-935 (302) 0.5 parts

[0110] Dispersant 5040 (402) 0.5 parts;

[0111] Wetting agent 405 (102) 0.4 parts;

[0112] Calcined kaolin 20 parts and calcium carbonate powder 15 parts;

[0113] Styrene-acrylic emulsion 17 parts;

[0114] Leveling agent 2020 (304) 0.6 parts;

[0115] Defoaming agent A10 (301) 0.25 parts;

[0116] Mildewproof fungicide 998A (206) 15 parts;

[0117] Film-forming aid 202 1.2 parts;

[0118] Antifreeze Propylene glycol (201) 1.5 parts;

[0119] pH regulator Aminomethyl propanol 0.15 parts;

[0120] Solvent is water; thickening agent A is hydroxyethyl cellulose; dispersant is anionic surface dispersant, commercially available type 5040 (402); wetting agent is non-ionic surfactant, commercially available type 405 (102); antifungal fungicide is benzoate preservative, commercially available type 998A (206); filler is one or more of kaolin powder, calcium carbonate powder, silica powder, titanium dioxide powder; leveling agent is non-ionic leveling agent, commercially available type 2020 (304); defoaming agent is low viscosity liquid paraffin, commercially available type 2020 (304); thickening agent B is polyacrylic acid copolymer; paint emulsion is styrene-acrylic emulsion; film-forming aid is alcohol ester compound, commercially available type 202;

[0121] Add materials according to the ratio, and the above high-efficiency mildew-proof paint is prepared by the following steps:

[0122] Step (a): add solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, antifungal fungicide into a sand mill and mix and grind at a speed of 1200 r / min for 30 min to obtain mixture A; the average particle size of the material particles is less than 10 μm;

[0123] Step (b): add the remaining materials into the mixture A, first stir at 1000 r / min for 60 min, and then stir at 300 r / min for 30 min to obtain the high-efficiency mildew-proof paint.

[0124] Comparative Example Two

[0125] A high-efficiency mildew-proof paint, comprising the following components in parts by weight:

[0126] Water 27 parts;

[0127] Thickening agent A Hydroxyethyl cellulose 0.5 parts;

[0128] Thickening agent B TT-935 (302) 0.5 parts

[0129] Dispersant 5040 (402) 0.5 parts;

[0130] Wetting agent 405 (102) 0.4 parts;

[0131] Calcined kaolin 20 parts and calcium carbonate powder 15 parts;

[0132] Styrene-acrylic emulsion 17 parts;

[0133] Leveling agent 2020 (304) 0.6 parts;

[0134] Defoaming agent A10 (301) 0.25 parts;

[0135] Mold inhibitor 998A (206) 15 parts;

[0136] Self-inhibiting mold inhibitor 5 parts;

[0137] Film-forming aid 202 1.2 parts;

[0138] Antifreeze agent propylene glycol (201) 1.5 parts;

[0139] pH adjuster aminomethyl propanol 0.15 parts;

[0140] The self-inhibiting mold inhibitor is prepared by the following steps:

[0141] Step (1): prepare a 15% boric acid aqueous solution, add 15 times the mass of the boric acid with porous titanium dioxide powder having an average particle size of 3 μm, stir and concentrate to a water content of 25%, and then dry to obtain boric acid modified porous material;

[0142] Step (2): add the boric acid modified porous material to ethylene glycol, add 0.3% p-toluenesulfonic acid based on the mass of the boric acid modified porous material, stir and soak, then heat to 125°C under anaerobic conditions for 4 hours, separate, and then remove excess ethylene glycol by distillation under reduced pressure to obtain the self-inhibiting mold inhibitor;

[0143] The solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant, commercially available as type 5040 (402); the wetting agent is a non-ionic surfactant, commercially available as type 405 (102); the mold inhibitor is a benzoate preservative, commercially available as type 998A (206); the filler is one or more of kaolin powder, calcium carbonate powder, silica powder, and titanium dioxide powder; the leveling agent is a non-ionic leveling agent, commercially available as type 2020 (304); the defoaming agent is low viscosity liquid paraffin, commercially available as type 2020 (304); the thickening agent B is a polyacrylic acid copolymer; the paint emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound, commercially available as type 202;

[0144] The materials are added in the proportions described above, and the above high-efficiency mold-resistant paint is prepared by the following steps:

[0145] Step (a): add the solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, and mold inhibitor to a sand mill and mix and grind at a speed of 1200 r / min for 30 minutes to obtain mixture A; the average particle size of the material particles is less than 10 μm;

[0146] Step (b): add the rest of the materials into the mixture A, first stir at 1000 r / min for 60 min, then stir at 300 r / min for 30 min, to obtain the high-efficiency mildew-proof coating.

[0147] Comparative Example Three

[0148] A high-efficiency mildew-proof coating comprises the following components by weight parts:

[0149] Water 27 parts;

[0150] Thickening agent A hydroxyethyl cellulose 0.5 parts;

[0151] Thickening agent B TT-935(302) 0.5 parts

[0152] Dispersant 5040(402) 0.5 parts;

[0153] Wetting agent 405(102) 0.4 parts;

[0154] Calcined kaolin 20 parts and calcium carbonate powder 15 parts;

[0155] Styrene-acrylic emulsion 17 parts;

[0156] Leveling agent 2020(304) 0.6 parts;

[0157] Defoaming agent A10(301) 0.25 parts;

[0158] Mildew-proof fungicide 998A(206) 15 parts;

[0159] Self-inhibiting mildew-proof agent 5 parts;

[0160] Film-forming aid 202 1.2 parts;

[0161] Antifreeze agent propylene glycol(201) 1.5 parts;

[0162] pH regulator aminomethyl propanol 0.15 parts;

[0163] The self-inhibiting mildew-proof agent is prepared by the following steps:

[0164] Step (1): prepare a boric acid aqueous solution with a mass concentration of 15%, add porous titanium dioxide powder with an average particle size of 10 μm at 15 times the mass of the boric acid, and after stirring and concentration, the water content is 25%, and the boric acid modified porous material is obtained after drying;

[0165] Step (2): add the boric acid modified porous material into ethylene glycol, add p-toluenesulfonic acid at 0.3% of the mass of the boric acid modified porous material, after stirring and soaking, heat to 125°C under anaerobic conditions, react for 4 h, after separation, remove the excess ethylene glycol by distillation under reduced pressure, to obtain the self-inhibiting mildew-proof agent;

[0166] Solvent is water; thickening agent A is hydroxyethyl cellulose; dispersant is anionic surface dispersant, commercially available type 5040 (402); wetting agent is non-ionic surfactant, commercially available type 405 (102); antifungal preservative is benzoate preservative, commercially available type 998A (206); leveling agent is non-ionic leveling agent, commercially available type 2020 (304); defoaming agent is low viscosity liquid paraffin, commercially available type 2020 (304); thickening agent B is polyacrylic acid copolymer; paint emulsion is styrene-acrylic emulsion; film-forming aid is alcohol ester compound, commercially available type 202;

[0167] The materials are added according to the ratio, and the above high-efficiency antifungal coating is prepared by the following steps:

[0168] Step (a): The solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, antifungal preservative are added to the sand mill and mixed and ground at a speed of 1200 r / min for 30 min to obtain mixture A; the average particle size of the material particles is less than 10 μm;

[0169] Step (b): The remaining materials are added to the mixture A, first stirred at 1000 r / min for 60 min, and then stirred at 300 r / min for 30 min to obtain the high-efficiency antifungal coating.

[0170] Comparative Example Four

[0171] A high-efficiency antifungal coating, comprising the following components by weight parts:

[0172] Water 27 parts;

[0173] Thickening agent A hydroxyethyl cellulose 0.5 parts;

[0174] Thickening agent B TT-935 (302) 0.5 parts

[0175] Dispersant 5040 (402) 0.5 parts;

[0176] Wetting agent 405 (102) 0.4 parts;

[0177] Calcined kaolin 20 parts and calcium carbonate powder 15 parts;

[0178] Styrene-acrylic emulsion 17 parts;

[0179] Leveling agent 2020 (304) 0.6 parts;

[0180] Defoaming agent A10 (301) 0.25 parts;

[0181] Antifungal preservative 998A (206) 15 parts;

[0182] Self-inhibiting antifungal agent 5 parts;

[0183] Film forming aid 202 1.2 parts;

[0184] Antifreezing agent propylene glycol (201) 1.5 parts;

[0185] pH adjuster aminomethyl propanol 0.15 parts;

[0186] The self-inhibiting mildewcide is prepared by the following steps:

[0187] Step (1): a 15% boric acid aqueous solution is prepared, and 15 times the mass of the boric acid is added with porous titanium dioxide powder with an average particle size of 3 μm, and after stirring and concentration, the water content is 25%, and the boric acid modified porous material is obtained by drying;

[0188] Step (2): the boric acid modified porous material is added to ethylene glycol, and 0.3% p-toluenesulfonic acid of the mass of the boric acid modified porous material is added, and after stirring and soaking, it is heated to 125°C under anaerobic conditions for 4 hours, and after separation, the excess ethylene glycol is removed by distillation under reduced pressure, and the self-inhibiting mildewcide is obtained;

[0189] The solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant, commercially available as type 5040 (402); the wetting agent is a non-ionic surfactant, commercially available as type 405 (102); the mildewcide is a benzoate preservative, commercially available as type 998A (206); the leveling agent is a non-ionic leveling agent, commercially available as type 2020 (304); the defoaming agent is low viscosity liquid paraffin, commercially available as type 2020 (304); the thickening agent B is a polyacrylic acid copolymer; the paint emulsion is a styrene-acrylic emulsion; and the film forming aid is an alcohol ester compound, commercially available as type 202;

[0190] The materials are added according to the proportions, and the above high-efficiency mildew-resistant paint is prepared by the following steps:

[0191] Step (a): the solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, and mildewcide are added to a sand mill and mixed and ground at a speed of 1200 r / min for 30 min to obtain a mixture A; the average particle size of the material particles is less than 10 μm;

[0192] Step (b): the remaining materials are added to the mixture A, first stirred at 1000 r / min for 60 min, and then stirred at 300 r / min for 30 min to obtain the high-efficiency mildew-resistant paint.

[0193] Comparative Example Five

[0194] A high-efficiency mildew-resistant paint, comprising the following components in parts by weight:

[0195] Water 27 parts;

[0196] Thickening agent A Hydroxyethyl cellulose 0.5 parts

[0197] Thickening agent B TT-935(302) 0.5 parts

[0198] Dispersant 5040(402) 0.5 parts

[0199] Wetting agent 405(102) 0.4 parts

[0200] Calcined kaolin 20 parts and calcium carbonate powder 15 parts

[0201] Styrene-acrylate emulsion 17 parts

[0202] Leveling agent 2020(304) 0.6 parts

[0203] Defoaming agent A10(301) 0.25 parts

[0204] Mold inhibitor 998A(206) 15 parts

[0205] Self-inhibiting mold inhibitor 5 parts

[0206] Film-forming aid 202 1.2 parts

[0207] Antifreeze agent Propylene glycol(201) 1.5 parts

[0208] pH adjuster Aminomethyl propanol 0.15 parts

[0209] The self-inhibiting mold inhibitor is prepared by the following steps:

[0210] Step (1): prepare a boracic acid aqueous solution with a mass concentration of 15%, add porous titanium dioxide powder with an average particle size of 3 μm at 15 times the mass of the boracic acid, and after stirring and concentration, the water content is 25%, and the boracic acid modified porous material is obtained by drying;

[0211] Step (2): add the boracic acid modified porous material into ethylene glycol, add p-toluenesulfonic acid at 0.3% of the mass of the boracic acid modified porous material, after stirring and soaking, heat to 125°C under anaerobic conditions, and react for 4 h, then separate, remove the excess ethylene glycol by distillation under reduced pressure, and obtain the self-inhibiting mold inhibitor;

[0212] The solvent is water; the thickening agent A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant, commercially available as type 5040 (402); the wetting agent is a non-ionic surfactant, commercially available as type 405 (102); the mildewproof fungicide is a benzoate preservative, commercially available as type 998A (206); the leveling agent is a non-ionic leveling agent, commercially available as type 2020 (304); the defoaming agent is low-viscosity liquid paraffin, commercially available as type 2020 (304); the thickening agent B is a polyacrylic acid copolymer; the paint emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound, commercially available as type 202.

[0213] The materials are added according to the proportions, and the above high-efficiency mildew-proof paint is prepared by the following steps:

[0214] Step (a): The solvent, thickening agent A, dispersant, wetting agent, filler, paint emulsion, mildew-proof fungicide, and self-inhibiting mildew-proof agent are added to a sand mill and mixed and ground at a speed of 1200 r / min for 30 min to obtain a mixture A; the average particle size of the material particles is less than 10 μm;

[0215] Step (b): The remaining materials are added to the mixture A, first stirred at 1000 r / min for 60 min, and then stirred at 300 r / min for 30 min to obtain a high-efficiency mildew-proof paint.

[0216] Performance detection:

[0217] 1. Evaluate the mildew-proof grade according to GB / T 1741-2020;

[0218] 2. Clean the bacterial plaque and observe the difficulty of cleaning the bacterial plaque;

[0219] 3. Evaluate the paint adhesion according to GB / T 9286.

[0220] The detection results are shown in Table 1.

[0221] Table 1

[0222]

[0223] As can be seen from the above results, the high-efficiency mildew-proof paints prepared in Examples 1 to 3 have better mildew-proof effect, mildew stain removal effect, and adhesion strength than the high-efficiency mildew-proof paints prepared in Comparative Examples 1 to 5.

[0224] The main difference between Comparative Example 1 and Example 1 is that no self-inhibiting mildew-proof agent is added in Comparative Example 1, so the mildew-proof effect is not as good as that of Example 1, and the traces after the generation of mildew stains are difficult to remove.

[0225] The difference between the comparative example two and the example one is that the self-inhibiting mildewcide is excessive. The self-inhibiting mildewcide is stored in the porous material as borate, which reduces the adsorption of the coating to some extent, which may be caused by the insufficient affinity between the porous material and the coating.

[0226] The difference between the comparative example three and the example one is that the particle of the self-inhibiting mildewcide is too large, which also reduces the adsorption of the coating, and the active sites of the porous material are less, which results in the poor mildew-proof ability and adhesion effect.

[0227] The difference between the comparative example four and the example one is that the water content after the stirring and concentration in step (2) is too high. This results in the uneven distribution of the borate in the borate modified porous material obtained in step (1), which leads to the decline of the comprehensive performance.

[0228] The difference between the comparative example five and the example one is that the mildewcide is added in step (a), which may cause the collapse of the porous structure and the premature precipitation of the borate, so that the mildew-proof effect is poor.

[0229] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited thereto. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the basically same technical problem and realize the basically same technical effect is covered in the protection scope of the present application.

Claims

1. A high-efficiency anti-mildew coating, characterized in that, Includes the following components by weight: Solvent 25-30 parts; Thickener A: 0.3-0.8 parts; Thickener B: 0.3-0.8 parts; Dispersant 0.3-1 part; 0.2-0.5 parts of wetting agent; 30-40 parts of filler; 15-20 parts of paint emulsion; Leveling agent 0.5-0.8 parts; 0.2-0.3 parts of defoamer; 10-20 parts of anti-mold and bactericide; 3-8 parts of self-inhibiting mildew inhibitor; Film-forming aid 1-1.5 parts; The self-inhibiting antifungal agent is prepared through the following steps: Step (1): Prepare a boric acid aqueous solution with a mass concentration of 5%-20%, add porous material powder at a mass ratio of 10-20 times that of boric acid, stir and concentrate until the water content is 20%-30%, and dry to obtain boric acid modified porous material; the average particle size of the porous material is 1-5μm; Step (2): Add boric acid modified porous material to ethylene glycol, add 0.1%-0.5% p-toluenesulfonic acid by weight of boric acid modified porous material, stir and impregnate, heat to 120-130℃ under oxygen-free conditions, react for 3-5 hours, separate, remove excess ethylene glycol by vacuum distillation, and obtain the antifungal agent. Add materials according to the specified ratio, including the following steps: Step (a): Add solvent, thickener A, dispersant, wetting agent, filler, paint emulsion, and antifungal and bactericidal agent to a sand mill and mix and grind to obtain mixture A; Step (b): Add the remaining materials to mixture A and stir thoroughly to obtain a high-efficiency anti-mildew coating.

2. The high-efficiency anti-mildew coating as described in claim 1, characterized in that, The solvent is water; the thickener A is hydroxyethyl cellulose; the dispersant is an anionic surface dispersant; the wetting agent is a nonionic surfactant; the antifungal and bactericidal agent is one or more of benzoate preservatives, isothiazolinone bactericides, or sorbate preservatives; the filler is one or more of kaolin powder, calcium carbonate powder, silica powder, and titanium dioxide powder; the leveling agent is a nonionic leveling agent; the defoamer is a low-viscosity liquid paraffin or an organosilicon defoamer; the thickener B is a polyacrylic acid copolymer; the coating emulsion is a styrene-acrylic emulsion; and the film-forming aid is an alcohol ester compound.

3. The high-efficiency anti-mildew coating as described in claim 1, characterized in that, The high-efficiency anti-mildew coating also includes 1-2 parts antifreeze and 0.1-0.2 parts pH adjuster; the antifreeze is propylene glycol; the pH adjuster is aminomethylpropanol.

4. The high-efficiency anti-mildew coating as described in claim 1, characterized in that, In step (1), the porous material is one of zeolite powder, porous carbon powder, porous titanium dioxide powder, and porous silicon dioxide powder.

5. A processing technology for a high-efficiency anti-mildew coating as described in any one of claims 1-4, characterized in that, Add materials according to the specified ratio, including the following steps: Step (a): Add solvent, thickener A, dispersant, wetting agent, filler, paint emulsion, and antifungal and bactericidal agent to a sand mill and mix and grind to obtain mixture A; Step (b): Add the remaining materials to mixture A and stir thoroughly to obtain a high-efficiency anti-mildew coating.

6. The processing technology of the high-efficiency anti-mildew coating as described in claim 5, characterized in that, In step (a), the average particle size of the material particles in the mixture A is less than 10 μm.

7. The processing technology of the high-efficiency anti-mildew coating as described in claim 5, characterized in that, In step (b), the stirring process for thorough stirring is as follows: first, stir at 800-1000 r / min for 30-60 min, and then stir at 300-500 r / min for 30-60 min.

Images