Waterproof environment-friendly aerosol coating and preparation method thereof

Abstract

The invention relates to the technical field of coatings, in particular to a waterproof environment-friendly aerosol coating and a preparation method thereof. Comprising the following preparation raw materials in parts by mass: 150-300 parts of composite silane modified polyether, 28-45 parts of a water-based polymer acrylic emulsion, 6-7 parts of nano aluminum oxide, 15-32 parts of organic silicon modified polyurethane, 300-400 parts of an end-capped monomer, 25-50 parts of methallyl sulfonic acid, 50-100 parts of water, 3-10 parts of a dispersing agent, 2-8 parts of an adsorbent, 5-10 parts of a curing agent, 6-8 parts of a bacteriostatic agent, 2-5 parts of a thixotropic agent and 2-10 parts of an anti-aging agent. 3-4 parts of an adjusting auxiliary agent and 20-30 parts of an environment-friendly propellant. The prepared aerosol coating can effectively resist water after being used, so that a wall body is more durable, and the corrosion resistance of a metal material in the wall surface can be improved; the aerosol type package is more convenient to use and can be more suitable for independent renovating and repairing of household wall surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and more particularly to a waterproof and environment-friendly aerosol coating and a preparation method thereof. Background Art

[0002] Traditional waterproof materials mainly include flexible waterproof materials such as waterproof membranes, durable waterproof coatings, and sealing ointments, as well as rigid waterproof materials based on cement as the main substrate, with the addition of water-based agents and other additives. Most of my country's waterproof projects use traditional waterproof materials, which have the disadvantages of poor aging resistance, low tensile strength, and temperature sensitivity.

[0003] There are many kinds of existing waterproof coatings, some of which are complicated to construct and have poor performance; some have poor waterproof effect and poor corrosion resistance; some require on-site mixing, which is not only troublesome to construct but also has the problem of inaccurate mixing, resulting in performance degradation and affecting the waterproof effect; some are prone to bubbles and have poor surface gloss.

[0004] In the current commercial housing decoration, tiles are generally chosen for laying on the walls of the kitchen and bathroom. The existing tile laying process is to first roll a layer of wall solid interface agent on the rough wall, and then roll two layers of K11 rigid waterproof mortar after the wall solid interface agent is dry. The two layers of waterproof mortar are constructed in two days. After the two layers of waterproof mortar are constructed, dry for 1-7 days, and then use tile adhesive to lay the tiles with tile adhesive on the back on the waterproof mortar layer. Conventional emulsion-type tile adhesive needs to dry on the tiles for 4-24 hours before laying the tiles on the waterproof mortar layer. Therefore, the existing tile laying process has many steps and is time-consuming.

[0005] In addition, there are uncertainties in the construction of wall fixing interface agents, waterproof mortars, tile adhesives, etc. For example, when constructing wall fixing agents, if the workers apply too little coating or the construction environment temperature is too low or too high, it will easily lead to problems with hollow tiles and falling tiles. For example, when constructing waterproof mortar, adding too much water will result in different thicknesses of the waterproof mortar layer, affecting the adhesion strength of the tiles. For example, when constructing tile adhesive, if the construction environment humidity is high, the drying speed of the tile adhesive will be slowed down, and it will be difficult for workers to control the laying time of the tiles. After the tiles are laid on the waterproof mortar layer, the problem of falling tiles is likely to occur. Summary of the invention

[0006] The present invention provides a waterproof and environment-friendly aerosol coating and a preparation method thereof, which can reduce the formaldehyde emission of the wall coating to 0 g / L, meet environmental protection requirements, enable the wall coating to be effectively waterproof, make the wall durable, and improve the corrosion resistance of the metal material in the wall; the aerosol packaging is more convenient to use and is more suitable for independent renovation and repair of household walls.

[0007] In a first aspect, the present invention provides a waterproof and environmentally friendly aerosol coating, comprising the following raw materials in parts by weight: 150-300 parts of composite silane-modified polyether, 28-45 parts of water-based polymer acrylic emulsion, 6-7 parts of nano-aluminum oxide, 15-32 parts of silicone-modified polyurethane, 300-400 parts of end-capping monomer, 25-50 parts of methyl propylene sulfonic acid, 50-100 parts of water, 3-10 parts of dispersant, 2-8 parts of adsorbent, 5-10 parts of curing agent, 6-8 parts of antibacterial agent, 2-5 parts of thixotropic agent, 2-10 parts of antioxidant, 3-4 parts of regulating auxiliary agent, and 20-30 parts of environmentally friendly propellant.

[0008] Preferably, the preparation raw materials include the following parts by weight: 200-300 parts of composite silane-modified polyether, 35-45 parts of water-based polymer acrylic emulsion, 6-7 parts of nano-alumina, 25-30 parts of silicone-modified polyurethane, 350-400 parts of end-capping monomer, 35-50 parts of methyl propylene sulfonic acid, 80-100 parts of water, 6-10 parts of dispersant, 5-8 parts of adsorbent, 6-10 parts of curing agent, 6-8 parts of antibacterial agent, 2-4 parts of thixotropic agent, 2-8 parts of antioxidant, 3-4 parts of regulating auxiliary agent, and 25-30 parts of environmentally friendly propellant.

[0009] Preferably, the preparation raw materials include the following parts by weight: 250-300 parts of composite silane-modified polyether, 35-40 parts of water-based polymer acrylic emulsion, 6-7 parts of nano-alumina, 28-30 parts of silicone-modified polyurethane, 380-400 parts of end-capping monomer, 45-50 parts of methyl propylene sulfonic acid, 80-90 parts of water, 6-8 parts of dispersant, 5-6 parts of adsorbent, 6-8 parts of curing agent, 6-7 parts of antibacterial agent, 3-4 parts of thixotropic agent, 3-6 parts of antioxidant, 3-4 parts of regulating auxiliary agent, and 28-30 parts of environmentally friendly propellant.

[0010] Preferably, the preparation raw materials include the following parts by mass: 280 parts of composite silane-modified polyether, 38 parts of water-based polymer acrylic emulsion, 6 parts of nano-alumina, 28 parts of silicone-modified polyurethane, 380 parts of end-capping monomer, 49 parts of methyl methacrylate sulfonic acid, 85 parts of water, 6 parts of dispersant, 5 parts of adsorbent, 7 parts of curing agent, 6 parts of antibacterial agent, 3 parts of thixotropic agent, 3 parts of antioxidant, 3 parts of regulating auxiliary agent, and 28 parts of environmentally friendly propellant.

[0011] Preferably, nano-CaCO3@ZnO is used as filler, and silane-modified polyether, plasticizer, filler, coupling agent and catalyst are added into a dynamic mixer and stirred under vacuum for 2-3 hours to obtain the composite silane-modified polyether.

[0012] Preferably, the molecular weight of the composite silane-modified polyether is 3000-6000; the mass ratio of the silane-modified polyether to the CaCO3@ZnO filler is 2-3:1-2.

[0013] Preferably, the molecular weight of the composite silane-modified polyether is 5000-6000; and the mass ratio of the silane-modified polyether to the CaCO3@ZnO filler is 2:1.

[0014] Preferably, the catalyst is an organic tin catalyst, and the organic tin catalyst includes one of U220H and U303.

[0015] Preferably, the organosilicon-modified polyurethane is prepared by reacting epoxysiloxane with water-based polyurethane microgel, and the mass ratio of epoxysiloxane to water-based polyurethane microgel is 1:3-7.

[0016] Preferably, the organosilicon-modified polyurethane is prepared by reacting epoxysiloxane with water-based polyurethane microgel, and the mass ratio of epoxysiloxane to water-based polyurethane microgel is 1:5-7.

[0017] Preferably, the organosilicon-modified polyurethane is prepared by reacting epoxysiloxane with water-based polyurethane microgel, and the mass ratio of epoxysiloxane to water-based polyurethane microgel is 1:5.

[0018] Preferably, the preparation method of the end-capping monomer is:

[0019] Methylcyclohexanediamine and ethyl isocyanate acrylate are mixed and reacted in a protective atmosphere to obtain a capping monomer;

[0020] The mass ratio of the methylcyclohexanediamine to the ethyl isocyanate acrylate is 1:1-2;

[0021] The protective atmosphere is nitrogen; the temperature of the chemical reaction is 10-20°C and the time is 20-40 minutes.

[0022] Preferably, the preparation method of the end-capping monomer is:

[0023] Methylcyclohexanediamine and ethyl isocyanate acrylate are mixed and reacted in a protective atmosphere to obtain a capping monomer;

[0024] The mass ratio of the methylcyclohexanediamine to the ethyl isocyanate acrylate is 1:2;

[0025] The protective atmosphere is nitrogen; the temperature of the chemical reaction is 20°C and the time is 20 minutes.

[0026] Preferably, the dispersant is one or more of sodium hexametaphosphate, sodium pyrophosphate, and tourmaline powder; the regulating auxiliary agent is a defoamer and an aqueous drier, and the mass ratio of the defoamer to the aqueous drier is 1-3:2-5; the defoamer is Foamex 810, the water-based drying agent is one of A-517 and HLD061, and the environmentally friendly propellant is one or more of tetrafluoroethane, heptafluoropropane, dimethyl ether, R1234ze(E), nitrogen, liquefied petroleum gas, and carbon dioxide.

[0027] Preferably, the adsorbent is one or more of adipic acid dihydrazide, nanoporous carbon, activated carbon, and molecular sieve;

[0028] The curing agent is one or more of trimethylhexamethylenediamine, dihexyltriamine, hexamethylenediamine, trimethylhexamethylenediamine, diethylamine, polyetherdiamine, meta-phenylenediamine, meta-phenylenediamine, diaminodiphenylmethane, diaminodiphenyl sulfone, meta-aminomethylamine, benzidine, chloro-o-phenylenediamine, benzylenediamine trimer, benzylenediamine trimer derivative, bis-benzylamino ether or phenylenediamine.

[0029] Preferably, the antibacterial agent is one or more of zinc sulfate, sodium pyrithione, isothiazolinone, benzisothiazolinone, formaldehyde releaser, organic amine, piperitriazine, thiabendazole, carbendazim, o-phenylphenol, thiophanate-methyl, isothiazolinone, dehydroacetic acid or salicylanilide;

[0030] The thixotropic agent is one of fumed silica, organic bentonite, hydrogenated castor oil or polyamide wax;

[0031] The antioxidant is one or more of ketone amine and antioxidant AW.

[0032] In a second aspect, the present invention provides a method for preparing a waterproof and environmentally friendly aerosol coating, comprising the following steps:

[0033] S1: mixing and stirring the composite silane-modified polyether, water-based polymer acrylic emulsion, nano-aluminum oxide, silicone-modified polyurethane, end-capping monomer, and methyl propylene sulfonic acid at a temperature of 10-30° C. for 30-60 minutes to obtain a first mixture;

[0034] S2: Mixing and stirring the dispersant, adsorbent, curing agent, antibacterial agent, thixotropic agent, antioxidant, and regulating agent at a temperature of 30-50° C. for 1-2 hours to obtain a second mixture;

[0035] S3: Finally, under the protection of nitrogen, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60 minutes to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and then the third mixture is proportionally filled into an aerosol can with an anti-corrosion coating on the inner wall according to the volume of the aerosol can, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, an environmentally friendly propellant is charged according to the formula ratio with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof environmentally friendly aerosol coating.

[0036] In a third aspect, the present invention provides an application of a waterproof and environmentally friendly aerosol coating, wherein the waterproof and environmentally friendly aerosol coating is used on the wall surface or ground of the interior or exterior wall of a building.

[0037] In summary, the present invention has the following beneficial effects:

[0038] 1. The coating prepared by using the copolymer of polyurethane and polysiloxane in the present invention has the function of moisture vulcanization; epoxysiloxane is used to effectively cross-link with the water-based polyurethane microgel to improve the mechanical properties of the film;

[0039] 2. Compared with ordinary nano-CaCO3, the particle size of CaCO3@ZnO in the present invention is larger, the surface of CaCO3 seems to be coated with a layer of ZnO, and many small-sized ZnO particles randomly adhere to the surface of CaCO3. As a potential UV-resistant aging filler, CaCO3@ZnO can effectively improve the corrosion resistance of the composite silane-modified polyether, making the corrosion resistance of the metal material of the wall better and the stability of the wall enhanced;

[0040] 3. The chemical structure of the polysiloxane in the silicone-modified polyurethane of the present invention is relatively special, so it has good chemical stability, electrical insulation, high and low temperature resistance, biocompatibility, physiological inertness, and hydrophobicity and moisture resistance, which makes the waterproof and environmentally friendly aerosol coating have strong waterproof performance and has good waterproof performance when used in different situations.

[0041] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the scope of protection of the present invention. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the examples. It is particularly noted that if no specific conditions are specified in the following examples, the reactions are carried out according to conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following examples can be obtained from common commercial sources.

[0043] Preparation examples of raw materials and / or intermediates

[0044] Preparation Example 1

[0045] A preparation method of a composite silane-modified polyether comprises the following steps: adding 100g of silane-modified polyether, 56g of plasticizer polyvinyl chloride, 50g of CaCO3@ZnO filler, 125g of coupling agent, wherein the coupling agent is silane coupling agent KH-550, and 69g of organic tin catalyst U220H into a dynamic mixer, and vacuum stirring for 2h to obtain the composite silane-modified polyether; wherein the molecular weight of the composite silane-modified polyether is 6000, and the mass ratio of the silane-modified polyether to the CaCO3@ZnO filler is 2:1.

[0046] Preparation Example 2

[0047] A method for preparing organosilicon-modified polyurethane comprises the following steps:

[0048] It is prepared by the reaction of epoxy siloxane and water-based polyurethane microgel, and the mass ratio of epoxy siloxane to water-based polyurethane microgel is 1:3.

[0049] Preparation Example 3

[0050] A method for preparing organosilicon-modified polyurethane comprises the following steps:

[0051] It is prepared by the reaction of epoxy siloxane and water-based polyurethane microgel, and the mass ratio of epoxy siloxane to water-based polyurethane microgel is 1:5.

[0052] Preparation Example 4

[0053] A method for preparing an end-capping monomer comprises the following steps:

[0054] The preparation method of the end-capping monomer is:

[0055] Methylcyclohexanediamine and ethyl isocyanate acrylate are mixed and reacted in a protective atmosphere to obtain a capping monomer;

[0056] The mass ratio of methylcyclohexanediamine to ethyl isocyanate acrylate is 1:1;

[0057] The protective atmosphere was nitrogen; the temperature of the chemical reaction was 20°C and the time was 20 min.

[0058] Preparation Example 5

[0059] A method for preparing an end-capping monomer comprises the following steps:

[0060] The preparation method of the end-capping monomer is:

[0061] Methylcyclohexanediamine and ethyl isocyanate acrylate are mixed and reacted in a protective atmosphere to obtain a capping monomer;

[0062] The mass ratio of methylcyclohexanediamine to ethyl isocyanate acrylate is 1:2;

[0063] The protective atmosphere was nitrogen; the temperature of the chemical reaction was 10°C and the time was 30 min.

[0064] Example

[0065] Example 1

[0066] A method for preparing a waterproof and environmentally friendly aerosol coating comprises the following steps:

[0067] S1: 150g of the composite silane-modified polyether prepared in Preparation Example 1, 28g of water-based polymer acrylic emulsion, 6g of nano-alumina, 15g of the silicone-modified polyurethane prepared in Preparation Example 3, 300g of the end-capping monomer prepared in Preparation Example 5, and 25g of methyl propylene sulfonic acid are mixed and stirred at a temperature of 10°C for 30 minutes to prepare a first mixture; wherein the particle size of the nano-alumina is 150nm.

[0068] S2: 50g water, 3g dispersant, 2g adsorbent, 5g curing agent, 6g antibacterial agent, 2g thixotropic agent, 2g antioxidant, and 3g regulating aid are mixed and stirred at a temperature of 30°C for 1h to obtain a second mixture; wherein the dispersant is sodium hexametaphosphate, the adsorbent is adipic acid dihydrazide, the curing agent is trimethylhexamethylenediamine, the antibacterial agent is a mixture of zinc sulfate and sodium pyrithione in a mass ratio of 1:1, the thixotropic agent is organic bentonite, the antioxidant is ketoneamine, the regulating aid is a defoamer and an aqueous drying agent, the mass ratio of the defoamer and the aqueous drying agent is 1:2, and the defoamer is Foamex 810, water-based drying agent is A-517; environmentally friendly propellant is nitrogen.

[0069] S3: Finally, under nitrogen protection, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60 minutes to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and 300g of the third mixture is filled into a 450ml aerosol can with an anti-corrosion coating on the inner wall, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, 10g of nitrogen propellant is charged with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof and environmentally friendly aerosol coating.

[0070] Example 2

[0071] A method for preparing a waterproof and environmentally friendly aerosol coating comprises the following steps:

[0072] S1: 180g of the composite silane-modified polyether prepared in Preparation Example 1, 30g of water-based polymer acrylic emulsion, 6g of nano-alumina, 18g of the silicone-modified polyurethane prepared in Preparation Example 3, 380g of the end-capping monomer prepared in Preparation Example 5, and 30g of methyl propylene sulfonic acid are mixed and stirred at a temperature of 10°C for 30min to prepare a first mixture; wherein the particle size of the nano-alumina is 150nm.

[0073] S2: 60g of water, 5g of dispersant, 5g of adsorbent, 8g of curing agent, 6g of antibacterial agent, 3g of thixotropic agent, 2g of antioxidant, and 3g of regulating aid are mixed and stirred at a temperature of 30°C for 1h to obtain a second mixture; wherein the dispersant is sodium hexametaphosphate, the adsorbent is adipic acid dihydrazide, the curing agent is trimethylhexamethylenediamine, the antibacterial agent is a mixture of zinc sulfate and sodium pyrithione in a mass ratio of 1:1, the thixotropic agent is organic bentonite, the antioxidant is ketoneamine, the regulating aid is a defoamer and an aqueous drying agent, the mass ratio of the defoamer and the aqueous drying agent is 1:2, and the defoamer is Foamex 810, water-based drying agent is A-517; environmentally friendly propellant is nitrogen.

[0074] S3: Finally, under the protection of nitrogen, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60min to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and 300g of the third mixture is filled into a 450ml aerosol can with an anti-corrosion coating on the inner wall, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, 12g of nitrogen propellant is charged with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof and environmentally friendly aerosol coating.

[0075] Example 3

[0076] A method for preparing a waterproof and environmentally friendly aerosol coating comprises the following steps:

[0077] S1: 200g of the composite silane-modified polyether prepared in Preparation Example 1, 32g of water-based polymer acrylic emulsion, 6g of nano-alumina, 20g of the silicone-modified polyurethane prepared in Preparation Example 3, 350g of the end-capping monomer prepared in Preparation Example 5, and 35g of methyl propylene sulfonic acid are mixed and stirred at a temperature of 30°C for 30 minutes to prepare a first mixture; wherein the particle size of the nano-alumina is 150nm.

[0078] S2: 80g of water, 5g of dispersant, 6g of adsorbent, 8g of curing agent, 6g of antibacterial agent, 2g of thixotropic agent, 5g of antioxidant, and 4g of regulating aid are mixed and stirred at a temperature of 30°C for 1h to obtain a second mixture; wherein the dispersant is sodium hexametaphosphate, the adsorbent is adipic acid dihydrazide, the curing agent is trimethylhexamethylenediamine, the antibacterial agent is a mixture of zinc sulfate and sodium pyrithione in a mass ratio of 1:2, the thixotropic agent is organic bentonite, the antioxidant is ketoneamine, the regulating aid is a defoamer and an aqueous drying agent, the mass ratio of the defoamer and the aqueous drying agent is 1:2, and the defoamer is Foamex 810, water-based drying agent is A-517; environmentally friendly propellant is nitrogen.

[0079] S3: Finally, under the protection of nitrogen, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60min to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and 300g of the third mixture is filled into a 450ml aerosol can with an anti-corrosion coating on the inner wall, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, 12g of nitrogen propellant is charged with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof and environmentally friendly aerosol coating.

[0080] Example 4

[0081] A method for preparing a waterproof and environmentally friendly aerosol coating comprises the following steps:

[0082] S1: 250g of the composite silane-modified polyether prepared in Preparation Example 1, 40g of water-based polymer acrylic emulsion, 6g of nano-alumina, 25g of the silicone-modified polyurethane prepared in Preparation Example 3, 380g of the end-capping monomer prepared in Preparation Example 5, and 35g of methyl propylene sulfonic acid are mixed and stirred at a temperature of 20°C for 30 minutes to prepare a first mixture; wherein the particle size of the nano-alumina is 150nm.

[0083] S2: 80g water, 5g dispersant, 6g adsorbent, 6g curing agent, 6g antibacterial agent, 3g thixotropic agent, 5g antioxidant, and 3g regulating aid are mixed and stirred at a temperature of 30°C for 1h to obtain a second mixture; wherein the dispersant is sodium hexametaphosphate, the adsorbent is adipic acid dihydrazide, the curing agent is trimethylhexamethylenediamine, the antibacterial agent is a mixture of zinc sulfate and sodium pyrithione in a mass ratio of 1:1, the thixotropic agent is organic bentonite, the antioxidant is ketoneamine, the regulating aid is a defoamer and an aqueous drying agent, the mass ratio of the defoamer and the aqueous drying agent is 1:2, and the defoamer is Foamex 810, water-based drying agent is A-517; environmentally friendly propellant is nitrogen.

[0084] S3: Finally, under nitrogen protection, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60 minutes to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and 300 g of the third mixture is filled into a 450 ml aerosol can with an anti-corrosion coating on the inner wall, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, 15 g of propellant is charged with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof and environmentally friendly aerosol coating.

[0085] Example 5

[0086] A method for preparing a waterproof and environmentally friendly aerosol coating comprises the following steps:

[0087] S1: 180g of the composite silane-modified polyether prepared in Preparation Example 1, 36g of water-based polymer acrylic emulsion, 7g of nano-alumina, 25g of the silicone-modified polyurethane prepared in Preparation Example 2, 360g of the end-capping monomer prepared in Preparation Example 4, and 33g of methyl propylene sulfonic acid are mixed and stirred at a temperature of 20°C for 30 minutes to prepare a first mixture; wherein the particle size of the nano-alumina is 150nm.

[0088] S2: 60g of water, 5g of dispersant, 2g of adsorbent, 5g of curing agent, 8g of antibacterial agent, 5g of thixotropic agent, 8g of antioxidant, and 3g of regulating aid are mixed and stirred at a temperature of 30°C for 1h to obtain a second mixture; wherein the dispersant is sodium hexametaphosphate, the adsorbent is adipic acid dihydrazide, the curing agent is trimethylhexamethylenediamine, the antibacterial agent is a mixture of zinc sulfate and sodium pyrithione in a mass ratio of 1:3, the thixotropic agent is organic bentonite, the antioxidant is ketoneamine, the regulating aid is a defoamer and an aqueous drying agent, the mass ratio of the defoamer and the aqueous drying agent is 1:2, and the defoamer is Foamex 810, water-based drying agent is A-517; environmentally friendly propellant is nitrogen.

[0089] S3: Finally, under nitrogen protection, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60min to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and 300g of the third mixture is filled into a 450ml aerosol can with an anti-corrosion coating on the inner wall, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, 11g of propellant is charged with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof and environmentally friendly aerosol coating.

[0090] Example 6

[0091] A method for preparing a waterproof and environmentally friendly aerosol coating comprises the following steps:

[0092] S1: 280g of the composite silane-modified polyether prepared in Preparation Example 1, 28g of water-based polymer acrylic emulsion, 6g of nano-alumina, 25g of the silicone-modified polyurethane prepared in Preparation Example 2, 370g of the end-capping monomer prepared in Preparation Example 5, and 25g of methyl propylene sulfonic acid are mixed and stirred at a temperature of 10°C for 30 minutes to prepare a first mixture; wherein the particle size of the nano-alumina is 150nm.

[0093] S2: 80g water, 3g dispersant, 6g adsorbent, 8g curing agent, 6g antibacterial agent, 2g thixotropic agent, 8g antioxidant, 4g regulating aid, at a temperature of 30°C, mixed and stirred for 1h to prepare a second mixture; wherein the dispersant is sodium hexametaphosphate, the adsorbent is adipic acid dihydrazide, the curing agent is trimethylhexamethylenediamine, the antibacterial agent is a mixture of zinc sulfate and sodium pyrithione in a mass ratio of 1:1, the thixotropic agent is organic bentonite, the antioxidant is ketoneamine, the regulating aid is a defoamer and an aqueous drying agent, the mass ratio of the defoamer and the aqueous drying agent is 1:2, and the defoamer is Foamex 810, water-based drying agent is A-517; environmentally friendly propellant is R1234ze(E).

[0094] S3: Finally, under nitrogen protection, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60 minutes to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and 300 g of the third mixture is filled into a 450 ml aerosol can with an anti-corrosion coating on the inner wall, and an aerosol valve with an anti-corrosion coating is installed. After sealing with an aerosol special sealing machine, 10 g of propellant is charged with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof and environmentally friendly aerosol coating.

[0095] Comparative Example

[0096] Comparative Example 1

[0097] The waterproof and environmentally friendly aerosol coating was prepared according to the method of Example 2, except that the composite silane-modified polyether component was not added.

[0098] Comparative Example 2

[0099] The waterproof and environmentally friendly aerosol coating was prepared according to the method of Example 2, except that the composite silane-modified polyether component was replaced by a silane-modified polyether.

[0100] Comparative Example 3

[0101] The waterproof and environmentally friendly aerosol coating was prepared according to the method of Example 2, except that no organosilicon-modified polyurethane component was added.

[0102] Comparative Example 4

[0103] The waterproof and environmentally friendly aerosol coating was prepared according to the method of Example 2, except that no end-capping monomer component was added.

[0104] Table 1 Performance test of Examples 1-6 and Comparative Examples 1-4

[0105]

[0106] The embodiments 1 to 6 were tested according to the national standard GB / T9755-2014 "Synthetic resin emulsion exterior wall coating" and the construction industry standard JG / T864-2008 "Polymer emulsion building waterproof coating", and the requirements for roof waterproof coatings were met in the relevant regulations.

[0107] The waterproof and environmentally friendly aerosol coatings prepared in Examples 1-6 have better performance than commercially available products, among which the waterproof and environmentally friendly aerosol coating prepared in Example 2 has the best performance, which shows that the use of composite silane-modified polyether, water-based polymer acrylic emulsion, nano-aluminum oxide, silicone-modified polyurethane, end-capping monomer, methyl methacrylate sulfonic acid, water, dispersant, adsorbent, curing agent, antibacterial agent, thixotropic agent, antioxidant, regulating auxiliary agent, and environmentally friendly propellant as materials can better exert the stability of the coating, making the coating have better waterproof performance, more environmentally friendly when used on walls, and improved anti-corrosion performance.

[0108] Comparative Examples 1-4 have poor water resistance and formaldehyde volatiles due to changes in formula materials, and are non-environmentally friendly coatings.

[0109] The above is only an exemplary embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A waterproof and environmentally friendly aerosol coating, characterized in that: The preparation material comprises the following raw materials in parts by weight: 150-300 parts of composite silane modified polyether, 28-45 parts of water-based polymer acrylic emulsion, 6-7 parts of nano-alumina, 15-32 parts of silicone modified polyurethane, 300-400 parts of end-capping monomer, 25-50 parts of methyl propylene sulfonic acid, 50-100 parts of water, 3-10 parts of dispersant, 2-8 parts of adsorbent, 5-10 parts of curing agent, 6-8 parts of antibacterial agent, 2-5 parts of thixotropic agent, 2-10 parts of antioxidant, 3-4 parts of regulating auxiliary agent and 20-30 parts of environmentally friendly propellant.

2. The waterproof and environmentally friendly aerosol coating according to claim 1, characterized in that: Using nano-CaCO3@ZnO as filler, adding silane-modified polyether, plasticizer, filler, coupling agent and catalyst into a dynamic mixer, and stirring under vacuum for 2-3 hours to obtain the composite silane-modified polyether.

3. The waterproof and environmentally friendly aerosol coating according to claim 1, characterized in that: The molecular weight of the composite silane-modified polyether is 3000-6000; the mass ratio of the silane-modified polyether to the CaCO3@ZnO filler is 2-3:1-2.

4. The waterproof and environmentally friendly aerosol coating according to claim 2, characterized in that: The catalyst is an organic tin catalyst, and the organic tin catalyst includes one of U220H and U303.

5. The waterproof and environmentally friendly aerosol coating according to claim 1, characterized in that: The organosilicon-modified polyurethane is prepared by reacting epoxysiloxane with water-based polyurethane microgel, and the mass ratio of the epoxysiloxane to the water-based polyurethane microgel is 1:3-7.

6. The waterproof and environmentally friendly aerosol coating according to claim 1, characterized in that: The preparation method of the end-capping monomer is: Methylcyclohexanediamine and ethyl isocyanate acrylate are mixed and reacted in a protective atmosphere to obtain a capping monomer; The mass ratio of the methylcyclohexanediamine to the ethyl isocyanate acrylate is 1:1-2; The protective atmosphere is nitrogen; the temperature of the chemical combination reaction is 10-20°C and the time is 20-40 minutes.

7. The waterproof and environmentally friendly aerosol coating according to claim 1, characterized in that: The dispersant is one or more of sodium hexametaphosphate, sodium pyrophosphate, and tourmaline powder; the regulating auxiliary agent is a defoamer and an aqueous drier, and the mass ratio of the defoamer to the aqueous drier is 1-3:2-5; the defoamer is Foamex 810, the water-based drying agent is one of A-517 and HLD061, and the environmentally friendly propellant is one or more of tetrafluoroethane, heptafluoropropane, dimethyl ether, R1234ze(E), nitrogen, liquefied petroleum gas, and carbon dioxide.

8. The waterproof and environmentally friendly aerosol coating according to claim 1, characterized in that: The adsorbent is one or more of adipic acid dihydrazide, nanoporous carbon, activated carbon, and molecular sieve; The curing agent is one or more of trimethylhexamethylenediamine, dihexyltriamine, hexamethylenediamine, trimethylhexamethylenediamine, diethylamine, polyetherdiamine, metaphenylenediamine, metaphenylenediamine, diaminodiphenylmethane, diaminodiphenyl sulfone, metaaminomethylamine, benzidine, chloro-o-phenylenediamine, benzylenediamine trimer, benzylenediamine trimer derivative, bisbenzylamino ether or phenylenediamine; The antibacterial agent is one or more of zinc sulfate, sodium pyrithione, isothiazolinone, benzisothiazolinone, formaldehyde releaser, organic amine, piperitriazine, thiabendazole, carbendazim, o-phenylphenol, thiophanate-methyl, isothiazolinone, dehydroacetic acid or salicylanilide; The thixotropic agent is one of fumed silica, organic bentonite, hydrogenated castor oil or polyamide wax; The antioxidant is one or more of ketamine and antioxidant AW.

9. The method for preparing the waterproof and environmentally friendly aerosol coating according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: mixing and stirring the composite silane-modified polyether, water-based polymer acrylic emulsion, nano-aluminum oxide, silicone-modified polyurethane, end-capping monomer, and methyl propylene sulfonic acid at a temperature of 10-30° C. for 30-60 minutes to obtain a first mixture; S2: Mixing and stirring the dispersant, adsorbent, curing agent, antibacterial agent, thixotropic agent, antioxidant, and regulating agent at a temperature of 30-50° C. for 1-2 hours to obtain a second mixture; S3: Finally, under the protection of nitrogen, the first mixture and the second mixture are mixed and stirred at a temperature of 10-30°C for 30-60 minutes to obtain a third mixture. The third mixture is filtered through a 320-330 mesh filter, and then the third mixture is filled into an aerosol can with an anti-corrosion coating on the inner wall according to the volume of the aerosol can. The aerosol valve with the anti-corrosion coating is installed, and after sealing with an aerosol special sealing machine, an environmentally friendly propellant is charged according to the formula ratio with an aerosol special inflator, and an atomizing nozzle is installed to make a waterproof environmentally friendly aerosol coating.

10. An application of a waterproof and environmentally friendly aerosol coating, characterized in that: The waterproof and environmentally friendly aerosol coating prepared according to any one of claims 1 to 9 is used on the wall surface or ground of the interior or exterior wall of a building.

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