An oily environment-friendly high-molecular anticorrosive waterproof coating and a preparation method thereof

Abstract

The application provides an oily environment-friendly high-molecular anticorrosive waterproof coating and a preparation method thereof, and belongs to the technical field of coating compositions. The oily environment-friendly high-molecular anticorrosive waterproof coating is prepared from the following raw materials in parts by weight: SEPS 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, inorganic filler 7-50 parts, defoaming agent 0.1-2 parts, antioxidant 0.1-2 parts, ultraviolet absorber 0.1-2 parts, light resistance agent 0.1-1 part, environment-friendly solvent 25-70 parts, and perfume 0-1 part. The oily environment-friendly high-molecular anticorrosive waterproof coating is waterproof, corrosion-resistant, environment-friendly and convenient to construct, and is suitable for application in surface protection of color steel tile and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coating compositions, and particularly relates to an oil-based environment-friendly high-molecular anticorrosive and waterproof coating and a preparation method thereof. BACKGROUND

[0002] As a kind of light weight, high strength, corrosion resistant building material, color steel tile is widely used in industrial plants, warehouses and other buildings. However, its metal substrate (zinc-plated steel sheet or aluminum-zinc alloy steel sheet) has significant shortcomings after long-term exposure: (1) poor protective effect of the plating layer: the zinc plating layer is usually only 20-30 μm thick, and is easily aged and failed under the erosion of ultraviolet light, acid rain, salt mist, etc., leading to corrosion and perforation of the substrate; (2) structural damage caused by thermal expansion and contraction: deformation and cracking at the joints due to temperature changes accelerate the risk of leakage, threatening the safety of equipment inside the building; (3) high maintenance cost: the service life of traditional color steel tile is only 8-15 years, and the replacement cost after corrosion is 3-5 times that of preventive coating. Therefore, color steel tile is generally coated with paint to prolong its service life. However, the performance of different paints varies greatly

[0003] In the prior art, there are many types of color steel tile coatings with different performances. For example, patent application document CN108017965A discloses a preparation method of a color steel tile coating, which comprises the following operation steps: after the surface of the color steel tile is cleaned, a modified liquid is sprayed on the surface; after the asphalt is heated to 170-180℃, basalt fibers and polyhexamethylene lactam powder are added and uniformly mixed, then the mixture is added to a high-speed shearing instrument for high-temperature off-speed shearing to prepare a heat insulation additive; after methyl methacrylate, adipic acid diglycidyl ester, dipolymerized linoleic acid diglycidyl ester, methyl methacrylate octadecyl alcohol ester and potassium persulfate are uniformly mixed, they are heated to react to prepare a copolymer emulsion; after the copolymer emulsion, the heat insulation additive, N-octyl diaminoethyl glycine hydrochloride, triisopropoxy aluminum and isopropoxy distearate are uniformly mixed, a color steel tile coating is prepared. The color steel tile coating has water resistance and corrosion resistance, but the coating uses asphalt as one of the main raw materials, which is low in cost, but has the following defects in high-temperature environment: the asphalt is not heat-resistant, when the temperature exceeds 60℃, the thermal motion of the asphalt molecular chain intensifies, which may cause the viscosity of the coating to decrease and weaken the water resistance; the aromatic hydrocarbon components in the asphalt may cause photo-oxidation under ultraviolet light, which may cause the coating to powder and crack, shortening the service life; and the asphalt may volatilize toxic gases such as benzene series at high temperature, which is poor in environmental protection.

[0004] Compared with the technology disclosed in the above documents, the water-based paint has good environmental protection and can avoid the problem of high temperature denaturation. For example, a single-component water-based silicone rubber waterproof paint disclosed in patent application document CN101747834A is prepared from silicone-acrylate emulsion, waterproof agent, film-forming aid, flame retardant, wollastonite, calcium carbonate, thickening agent and defoaming agent. The paint is a single-component water-based paint and can be applied to color steel tile coating protection. However, the low-temperature construction of the water-based paint has the following limitations: when the environmental temperature is lower than 5℃, the water evaporation rate decreases sharply, resulting in the prolongation of the coating surface drying time and the damage to the paint film integrity due to dew or frost; the resin molecular chain segment movement is limited at low temperature, and the adhesion between the coating and the substrate decreases significantly, which is prone to peeling and failure; the early and late low-temperature periods need to be avoided, the effective construction time per day is compressed, and the project progress is affected.

[0005] Therefore, the existing color steel tile waterproof paint still has many shortcomings, and it is important and necessary to develop a color steel tile paint with waterproof, corrosion-resistant, convenient construction and environmental protection. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to provide an oil-based environmental protection high molecular paint which is waterproof, corrosion-resistant, environmentally friendly and convenient to construct.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is as follows: an oil-based environmental protection high molecular corrosion-resistant and waterproof paint is prepared from the following raw materials by weight: SEPS 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, inorganic filler 7-50 parts, defoaming agent 0.1-2 parts, antioxidant 0.1-2 parts, ultraviolet absorber 0.1-2 parts, light resistance agent 0.1-1 part, environmentally friendly solvent 25-70 parts, and perfume 0-1 part.

[0008] Optionally, the inorganic filler is a combination of two or more of mica powder, titanium white powder, mica iron oxide gray, nano silicon dioxide and nano titanium dioxide, preferably a combination of mica powder, titanium white powder, mica iron oxide gray, nano silicon dioxide and nano titanium dioxide, wherein the weight parts of each raw material are as follows: mica powder 5-20 parts, titanium white powder 1-8 parts, mica iron oxide gray 1-8 parts, nano silicon dioxide 0.5-5 parts, and nano titanium dioxide 0.1-3 parts.

[0009] Optionally, the defoaming agent is at least one of polyether modified silicon defoaming agent and polyether defoaming agent.

[0010] Optionally, the anti-aging agent comprises anti-aging agent I and anti-aging agent II, the anti-aging agent I and the anti-aging agent II are respectively selected from hindered phenolic anti-aging agent or phosphite anti-aging agent, the mass ratio of the anti-aging agent I to the anti-aging agent II is (0.1-1):(0.1-0.5). The hindered phenolic anti-aging agent can be selected from 2,6-di-tert-butyl-p-cresol (BHT) or tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester, and the phosphite anti-aging agent can be selected from tris(2,4-di-tert-butylphenyl)phosphite or dipentaerythritol disteraryl phosphite.

[0011] Optionally, the ultraviolet absorber comprises ultraviolet absorber I and ultraviolet absorber II, the ultraviolet absorber I and the ultraviolet absorber II are respectively selected from benzotriazole ultraviolet absorber, benzophenone ultraviolet absorber or triazine ultraviolet absorber, the mass ratio of the ultraviolet absorber I to the ultraviolet absorber II is (0.1-1.2):(0.1-0.8). The benzotriazole ultraviolet absorber can be selected from UV-P (2-(2'-hydroxy-5'-methylphenyl)benzotriazole) or UV-327 (2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole), the benzophenone ultraviolet absorber can be selected from UV-9 (2-hydroxy-4-methoxybenzophenone) or UV-531 (2-hydroxy-4-n-octyloxybenzophenone), and the triazine ultraviolet absorber can be selected from UV-360 (2,2'-methylene-bis(6-(4-tert-octylphenyl)phenyl-4-benzotriazole).

[0012] Optionally, the light-blocking agent is kaolin or barium sulfate.

[0013] Optionally, the environmentally friendly solvent comprises environmentally friendly solvent I and environmentally friendly solvent II, the environmentally friendly solvent I and the environmentally friendly solvent II are respectively selected from ester solvent, the ester solvent can be selected from isopropyl acetate, ethyl acetate, n-butyl acetate, ethyl lactate, acetyl triethyl citrate or propylene glycol methyl ether acetate, and the mass ratio of the environmentally friendly solvent I to the environmentally friendly solvent II is (15-40):(10-30).

[0014] Optionally, the weight percentage of the perfume is 0.1-1 part, and the perfume is at least one of limonene, linalool, menthol, benzyl acetate and γ-nonalactone.

[0015] Optionally, the oil-based environment-friendly high-molecular anti-corrosion and waterproof coating is made of the following raw materials by weight: SEPS 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, mica powder 5-20 parts, titanium white 1-8 parts, mica iron oxide gray 1-8 parts, nano-silicon dioxide 0.5-5 parts, nano-titanium dioxide 0.1-3 parts, defoaming agent 0.1-2 parts, anti-aging agent I 0.1-1 part, anti-aging agent II 0.1-0.5 part, ultraviolet absorber I 0.1-1.2 parts, ultraviolet absorber II 0.1-0.8 parts, light resistance agent 0.1-1 part, environment-friendly solvent I 15-40 parts, environment-friendly solvent II 10-30 parts, and perfume 0-1 part.

[0016] The application further provides a preparation method of the oil-based environment-friendly high-molecular anti-corrosion and waterproof coating, which comprises the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin and environment-friendly solvent, stirring and dissolving at 60-80 DEG C to obtain a base; cooling to below 50 DEG C, adding inorganic fillers, defoaming agent, anti-aging agent, ultraviolet absorber, light resistance agent and perfume into the base in sequence, stirring, and standing to obtain a product.

[0017] Compared with the prior art, the application has the following advantages:

[0018] The application realizes comprehensive performance such as waterproof, corrosion resistance and aging resistance through the functional complementation of various resin bases, the multi-dimensional protection of the additive system and the balance of the environment-friendly solvent.

[0019] The coating base of the application adopts SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin and A81 resin in cooperation, wherein:

[0020] SEPS (styrene-ethylene / propylene-styrene block copolymer), as a base resin, provides flexibility, film-forming property and mechanical strength; the adhesion is enhanced by the styrene segment, the ethylene-propylene segment imparts water resistance and elasticity, while it does not contain polar groups, has good solubility in environmentally friendly solvents, and has high compatibility with polyisobutylene, can form a dense waterproof film layer, and improve the waterproof performance. Polyisobutylene, as an adhesion promoter, improves the flexibility and low temperature performance of the coating, and cooperates with SEPS to enhance the waterproof sealing performance. Terpene resin, as an adhesion resin, improves the wettability and initial adhesion of the coating to the base material; and cooperates with polyisobutylene to form a hydrogen bond network, thereby improving the adhesion of the coating to the color steel tile base material; at the same time, the hydrophobicity of terpene resin and the chemical inertness of polyisobutylene synergistically make the coating resistant to acid and alkali corrosion. Poly-alpha-methylstyrene resin improves the thermal stability and ultraviolet aging resistance of the coating through the rigid benzene ring structure, and can optimize the adhesion durability when compounded with terpene resin. A81 resin (aldehyde resin) improves the crosslinking density of the coating through intermolecular hydrogen bonds, thereby improving the hardness of the coating while maintaining flexibility, preventing the coating from cracking in a wide temperature range, and enhancing weather resistance. Thus, the above-mentioned base materials cooperate with each other to lay the foundation for the coating to obtain excellent waterproof, corrosion-resistant and other properties.

[0021] Meanwhile, the coating of the present application is preferably compounded with inorganic fillers, defoamers, anti-aging agents, ultraviolet absorbers, light blockers, environmentally friendly solvents and fragrances on the basis of the base material, to further enhance the waterproof, corrosion-resistant and other properties of the coating. Among them:

[0022] The inorganic fillers, preferably a combination of mica powder, titanium dioxide, mica iron oxide gray, nano silicon dioxide and nano titanium dioxide, adjust the rheological property while combining various filler types to block water vapor and enhance the corrosion resistance and adhesion of the coating. The defoamer inhibits the generation of bubbles during construction, avoids the formation of pinhole defects in the coating, and improves the density of the coating. The anti-aging agent, ultraviolet absorber and light blocker synergistically capture free radicals, delay oxidative degradation, convert light energy, and reflect UV light, all of which resist photo-thermal oxidation, improve the aging resistance and temperature change resistance of the coating.

[0023] After testing, the coating obtained by the present application has an adhesion of 0-1 grade, a neutral salt spray resistance of 0 grade, an aging resistance of 0-1 grade, qualified acid, alkali and temperature change resistance, qualified waterproofness, no volatile organic compounds, and significantly improved comprehensive performance, while meeting environmental protection requirements. DETAILED DESCRIPTION

[0024] For a better understanding of the present application, reference will be made to the following examples, which are intended to further illustrate but not limit the application. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without one or more of these specific details.

[0025] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0026] All starting materials were obtained from commercial sources unless otherwise specified, and were used without further purification unless otherwise specified, and contain no components other than those not specifically named if not otherwise specified.

[0027] In the following examples, an oily environment-friendly polymer anticorrosive waterproof coating is made from the following raw materials by weight: SEPS 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, mica powder 5-20 parts, titanium white 1-8 parts, mica iron oxide gray 1-8 parts, nano-silicon dioxide 0.5-5 parts, nano-titanium dioxide 0.1-3 parts, defoaming agent 0.1-2 parts, antioxidant I 0.1-1 part, antioxidant II 0.1-0.5 part, ultraviolet absorber I 0.1-1.2 part, ultraviolet absorber II 0.1-0.8 part, light resistance agent 0.1-1 part, environment-friendly solvent I 15-40 parts, environment-friendly solvent II 10-30 parts, and perfume 0-1 part.

[0028] The defoaming agent is at least one of a polyether-modified silicone defoaming agent and a polyether defoaming agent.

[0029] The antioxidant I and the antioxidant II are respectively selected from a hindered phenol antioxidant or a phosphite antioxidant, the hindered phenol antioxidant can be selected from 2,6-di-tert-butyl-p-cresol (BHT) or tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, and the phosphite antioxidant can be selected from tris(2,4-di-tert-butylphenyl) phosphite or dipentaerythritol disteraryl ester.

[0030] The ultraviolet absorber I and the ultraviolet absorber II are respectively selected from benzotriazole ultraviolet absorber, benzophenone ultraviolet absorber or triazine ultraviolet absorber, the benzotriazole ultraviolet absorber can be selected from UV-P (2-(2'-hydroxy-5'-methylphenyl) benzotriazole) or UV-327 (2-(2'-hydroxy-3', 5'-di-tert-butylphenyl)-5-chlorobenzotriazole), the benzophenone ultraviolet absorber can be selected from UV-9 (2-hydroxy-4-methoxybenzophenone) or UV-531 (2-hydroxy-4-n-octyloxybenzophenone), and the triazine ultraviolet absorber can be selected from UV-360 (2, 2'-methylene-bis (6-benzotriazole-4-tert-octylphenyl phenol).

[0031] The light resistance agent is kaolin or barium sulfate.

[0032] The environmentally friendly solvent I and the environmentally friendly solvent II are respectively selected from ester solvents, and the ester solvents can be selected from isopropyl acetate, ethyl acetate, n-butyl acetate, ethyl lactate, acetyl citrate triethyl ester or propylene glycol methyl ether acetate.

[0033] The weight fraction of the perfume is 0.1-1 part, and the perfume is at least one of limonene, linalool, menthol, benzyl acetate and gamma-nonalactone.

[0034] The weight fractions of the raw materials for preparing the oil-based environmentally friendly high-molecular anti-corrosion and waterproof coating are as follows: SEPS 8 parts, polyisobutylene 5 parts, terpene resin 9 parts, poly-alpha-methylstyrene resin 6 parts, A81 resin 5 parts, mica powder 12 parts, titanium white powder 5 parts, mica iron oxide gray 3 parts, nano silicon dioxide 3 parts, nano titanium dioxide 1.6 parts, polyether modified silicon defoaming agent 1.3 parts, 2, 6-di-tert-butyl-p-cresol 0.5 part, tris (2, 4-di-tert-butylphenyl) phosphite 0.2 part, UV-P 0.8 part, UV-531 0.5 part, kaolin 0.5 part, isopropyl acetate 20 parts, ethyl acetate 25 parts, and limonene 0.2 part.

[0035] The preparation method of the oil-based environmentally friendly high-molecular anti-corrosion and waterproof coating comprises the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin and environmentally friendly solvents, stirring and dissolving at 72 ℃ to obtain a matrix; cooling to 50 ℃, and then adding inorganic fillers, defoaming agents, anti-aging agents, ultraviolet absorbers, light resistance agents and perfumes into the matrix in sequence, stirring, and standing to obtain a product.

[0036] Example 2: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 10 parts, polyisobutylene 3 parts, terpene resin 3 parts, poly-alpha-methylstyrene resin 7 parts, A81 resin 8 parts, mica powder 10 parts, titanium white 4 parts, mica iron oxide gray 4 parts, nano-silicon dioxide 2 parts, nano-titanium dioxide 1.8 parts, polyether modified silicon defoaming agent 1.2 parts, 2,6-di-tert-butyl-p-cresol 0.3 parts, dipentaerythritol di-stearate 0.1-0.5 parts, UV-327 0.7 parts, UV-90 0.8 parts, kaolin 0.7 parts, isopropyl acetate 15 parts, n-butyl acetate 20 parts, linalool 0.1 parts.

[0037] A preparation method of an oily environment-friendly high-molecular anti-corrosion and waterproof coating includes the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin and environment-friendly solvent, stirring and dissolving at 75°C to obtain a base; cooling to 50°C, adding inorganic fillers, defoaming agent, anti-aging agent, ultraviolet absorber, light resistance agent and spices into the base in sequence, stirring, and standing to obtain a product.

[0038] Example 3: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 12 parts, polyisobutylene 10 parts, terpene resin 5 parts, poly-alpha-methylstyrene resin 5 parts, A81 resin 6 parts, mica powder 12 parts, titanium white 3 parts, mica iron oxide gray 5 parts, nano-silicon dioxide 4 parts, nano-titanium dioxide 2.1 parts, polyether modified silicon defoaming agent 0.5 parts, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester 0.6 parts, tris(2,4-di-tert-butylphenyl) phosphite 0.2 parts, UV-327 0.1 parts, UV-360 0.8 parts, kaolin 0.5 parts, isopropyl acetate 20 parts, ethyl lactate 15 parts, menthol 0.3 parts.

[0039] A preparation method of an oily environment-friendly high-molecular anti-corrosion and waterproof coating includes the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin and environment-friendly solvent, stirring and dissolving at 80°C to obtain a base; cooling to 50°C, adding inorganic fillers, defoaming agent, anti-aging agent, ultraviolet absorber, light resistance agent and spices into the base in sequence, stirring, and standing to obtain a product.

[0040] Example 4: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 15 parts, polyisobutylene 8 parts, terpene resin 7 parts, poly-alpha-methylstyrene resin 10 parts, A81 resin 10 parts, mica powder 8 parts, titanium white 6 parts, mica iron oxide gray 7 parts, nano-silicon dioxide 5 parts, nano-titanium dioxide 2.5 parts, polyether modified silicon defoaming agent 0.8 parts, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester 0.1 part, dipentaerythritol bis-stearyl alcohol diphosphite 0.5 part, UV-9I 1.2 part, UV-360 0.1 part, kaolin 0.3 part, isopropyl acetate 30 parts, acetyl triethyl citrate 100 parts, benzyl acetate 0.5 part.

[0041] A preparation method of an oily environment-friendly high-molecular anti-corrosion and waterproof coating includes the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin, and environment-friendly solvents, stirring and dissolving at 60°C to obtain a base; cooling to 48°C, adding inorganic fillers, defoaming agents, anti-aging agents, ultraviolet absorbers, light blockers, and fragrances into the base in sequence, stirring, and standing to obtain a product.

[0042] Example 5: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 5 parts, polyisobutylene 15 parts, terpene resin 10 parts, poly-alpha-methylstyrene resin 12 parts, A81 resin 10 parts, mica powder 12 parts, titanium white 8 parts, mica iron oxide gray 5 parts, nano-silicon dioxide 0.5 parts, nano-titanium dioxide 3 parts, polyether defoaming agent 0.1 part, 2,6-di-tert-butyl-p-cresol 0.7 part, tris(2,4-di-tert-butylphenyl)phosphite 0.1 part, UV-P 0.2 part, UV-531 0.6 part, barium sulfate 0.1 part, ethyl acetate 35 parts, propylene glycol methyl ether acetate 10 parts, and menthol 1 part.

[0043] A preparation method of an oily environment-friendly high-molecular anti-corrosion and waterproof coating includes the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin, and environment-friendly solvents, stirring and dissolving at 65°C to obtain a base; cooling to 50°C, adding inorganic fillers, defoaming agents, anti-aging agents, ultraviolet absorbers, light blockers, and fragrances into the base in sequence, stirring, and standing to obtain a product.

[0044] Example 6: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 20 parts, polyisobutylene 1 part, terpene resin 12 parts, poly-alpha-methylstyrene resin 1 part, A81 resin 2 parts, mica powder 20 parts, titanium white 7 parts, mica iron oxide gray 8 parts, nano-silicon dioxide 1.5 parts, nano-titanium dioxide 0.5 parts, polyether defoaming agent 2 parts, 2,6-di-tert-butyl-p-cresol 1 part, dipentaerythritol dihydrogen distearyl phosphate 0.1 part, UV-327 0.5 part, UV-9 0.6 part, barium sulfate 0.3 part, n-butyl acetate 15 parts, ethyl lactate 30 parts, benzyl acetate 0.4 part.

[0045] A method for preparing an oily environment-friendly high-molecular anti-corrosion and waterproof coating includes the following steps: mixing SEPS, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin, and environment-friendly solvent, stirring and dissolving at 70°C to obtain a base; cooling to 50°C, adding inorganic fillers, defoaming agent, anti-aging agent, ultraviolet absorber, light resistance agent, and spices to the base in sequence, stirring, and standing to obtain a product.

[0046] The preparation methods of the oily environment-friendly high-molecular anti-corrosion and waterproof coatings in the following examples 7-11 all refer to example 1, and the corresponding raw materials involved are specified in the corresponding examples.

[0047] Example 7: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 16 parts, polyisobutylene 4 parts, terpene resin 13 parts, poly-alpha-methylstyrene resin 3 parts, A81 resin 4 parts, mica powder 5 parts, titanium white 1 part, mica iron oxide gray 1 part, nano-silicon dioxide 2 parts, nano-titanium dioxide 0.1 part, polyether defoaming agent 1.7 parts, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester 0.6 part, tris(2,4-di-tert-butylphenyl) phosphite 0.2 part, UV-P 0.9 part, UV-360 0.6 part, barium sulfate 1 part, isopropyl acetate 40 parts, ethyl acetate 10 parts, gamma-nonyl lactone 0.6 part.

[0048] Example 8: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 18 parts, polyisobutylene 13 parts, terpene resin 6 parts, poly-alpha-methylstyrene resin 4 parts, A81 resin 3 parts, mica powder 16 parts, titanium white 2 parts, mica iron oxide gray 2 parts, nano-silicon dioxide 3 parts, nano-titanium dioxide 0.3 part, polyether defoaming agent 1.5 parts, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester 0.5 part, dipentaerythritol dihydrogen distearyl phosphate 0.3 part, UV-327 1.0 part, UV-360 0.3 part, barium sulfate 0.9 part, acetyl triethyl citrate 26 parts, n-butyl acetate 200 parts, limonene 0.8 part.

[0049] Example 9: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 13 parts, polyisobutylene 12 parts, terpene resin 15 parts, poly-alpha-methylstyrene resin 12 parts, A81 resin 8 parts, mica powder 18 parts, titanium white 3 parts, mica iron oxide gray 3 parts, nano-silicon dioxide 2.5 parts, nano-titanium dioxide 2.3 parts, polyether modified silicone defoamer 0.7 parts, 2,6-di-tert-butyl-p-cresol 2 parts, UV-P 2 parts, kaolin 1 part, isopropyl acetate 50 parts.

[0050] Example 10: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 15 parts, polyisobutylene 10 parts, terpene resin 8 parts, poly-alpha-methylstyrene resin 10 parts, A81 resin 9 parts, mica powder 15 parts, titanium white 4 parts, mica iron oxide gray 7 parts, nano-silicon dioxide 3 parts, nano-titanium dioxide 2.5 parts, polyether modified silicone defoamer 0.5 parts, tris(2,4-di-tert-butylphenyl) phosphite 1.5 parts, UV-531 1.6 parts, barium sulfate 1 part, ethyl acetate 55 parts, menthol 0.5 parts.

[0051] Example 11: An oily environment-friendly high-molecular anti-corrosion and waterproof coating is made from the following raw materials by weight: SEPS 7 parts, polyisobutylene 11 parts, terpene resin 7 parts, poly-alpha-methylstyrene resin 9 parts, A81 resin 10 parts, mica powder 12 parts, titanium white 5 parts, mica iron oxide gray 6 parts, nano-silicon dioxide 4 parts, nano-titanium dioxide 3 parts, polyether defoamer 1.1 parts, pentaerythritol distearyl ester diphosphite 0.6 parts, tris(2,4-di-tert-butylphenyl) phosphite 0.5 parts, UV-9 1.5 parts, kaolin 1 part, isopropyl acetate 45 parts, gamma-nonyl lactone 0.6 parts.

[0052] The following are comparative embodiments.

[0053] Comparative Example 1: A color steel tile coating, which is different from Example 1 in that polyisobutylene is omitted.

[0054] Comparative Example 2: A color steel tile coating, which is different from Example 2 in that poly-alpha-methylstyrene resin is omitted.

[0055] Comparative Example 3: A color steel tile coating, which is different from Example 3 in that A81 resin is omitted.

[0056] Comparative Example 4: A color steel tile coating, which is different from Example 4 in that C5 petroleum resin is used to replace terpene resin, and the rest of the raw materials and weight parts remain unchanged.

[0057] Comparative Example 5: A color steel tile coating, which is different from Example 5 in that the weight fraction of terpene resin is 1 part.

[0058] Comparative Example 6: A color steel tile coating, different from Example 9 in that the weight fractions of 2,6-di-tert-butyl-p-cresol, UV-P and kaolin are 3 parts, 0.5 parts and 1.5 parts, respectively, and the rest of the raw materials and weight fractions remain unchanged.

[0059] Comparative Example 7: A color steel tile coating, different from Example 10 in that the inorganic filler in Example 1 is replaced with the following raw material combination with the following weight fractions: mica powder 15 parts, nano-silicon dioxide 3 parts.

[0060] Next, the coatings prepared in Examples 1-5, Examples 9-10 and Comparative Examples 1-7 were evaluated for performance. The coatings prepared in Examples 1-5, Examples 9-10 and Comparative Examples 1-7 were sampled at room temperature, coated on treated steel plates with a thickness of 0.7 mm, and test specimens were prepared according to the relevant test standards. The curing environment had a temperature of (23±2) °C and a humidity of (50±10) %. The dry coating film thickness after curing was 50±5 microns, and the test specimens were prepared for testing. Three parallel samples were prepared for each group.

[0061] (1) Adhesion test and rating: The test and rating were performed according to the method specified in GB / T9286-2021 "Color Paint and Varnish Grading Test".

[0062] (2) Acid resistance test: The test was performed according to the method specified in GB / T 9274-1988 "Test Procedure - Method A (Immersion Method)". The test specimens were immersed in a 5% H2SO4 solution for 720 hours according to the method. No cracking, blistering, rusting or peeling of the coating was observed, indicating that the coating was resistant to acid. Otherwise, it was evaluated as unqualified, and the unqualified items were recorded.

[0063] (3) Alkali resistance test: The test was performed according to the method specified in GB / T 9274-1988 "Test Procedure - Method A (Immersion Method)". The test specimens were immersed in a 5% NaOH solution for 720 hours according to the method. No cracking, blistering, rusting or peeling of the coating was observed, indicating that the coating was resistant to alkali. Otherwise, it was evaluated as unqualified, and the unqualified items were recorded.

[0064] (4) Neutral salt spray resistance test: The test was performed according to the method specified in GB / T10125-2021 "Neutral Salt Spray Test". The results were evaluated according to GB / T1766-2008 "Color Paint and Varnish Coating Aging Rating Method" for comprehensive aging performance rating.

[0065] (5) Aging resistance test: The test was performed according to the method specified in GB / T1865-2009 "Color Paint and Varnish Artificial Climate Aging and Artificial Radiation Exposure Filtered Xenon Arc Radiation". The results were evaluated according to GB / T1766-2008 "Color Paint and Varnish Coating Aging Rating Method" for comprehensive aging performance rating.

[0066] (6) Temperature change resistance test: according to the method specified in JG / T 25-2017 "Building Coatings Coating Temperature Change Resistance Test Method", observe whether the coating of the test piece is powdering, cracking, peeling, blistering and discoloration, in each test, all test pieces are not powdering, cracking, peeling, blistering, discoloration, loss of luster, and are determined to be qualified, otherwise unqualified.

[0067] (7) Waterproofness test: according to the "15 Impermeability" specified in GB / T 16777-2008 "Building Waterproof Coatings Test Method", test pressure 0.3 MPa, time 30 min, all test pieces are not permeable, and are qualified.

[0068] (8) Environmental performance: according to the method specified in GB / T 23985-2009 "Color Paint and Varnish Determination of Volatile Organic Compounds (VOC) Content Difference Method", test the VOC content, and determine whether it meets the VOC content ≤50 g / L in GB / T 38597-2020 Low Volatile Organic Compound Content Coating Product Technical Requirements.

[0069] The performance test results of the obtained coatings of examples 1-5, examples 9-10 and comparative examples 1-7 are listed in tables 1 and 2, respectively.

[0070] Table 1 Performance test results of coatings of examples 1-5 and examples 9-10

[0071]

[0072] The above results show that the adhesion of the obtained coating is 0-1 level, the neutral salt spray resistance is 0 level, the aging resistance is 0-1 level, the acid resistance, alkali resistance and temperature change resistance are qualified, the waterproofness is qualified, there is no volatile organic compound, the comprehensive performance is outstanding, and the environmental protection demand is met at the same time.

[0073] Table 2 Performance test results of coatings of comparative examples 1-7

[0074]

[0075] The above results show that, for the comparative example 1, the adhesion, neutral salt spray resistance and aging resistance of the coating are decreased, the waterproof property is obviously unqualified, and there is water seepage phenomenon; for the comparative example 2, the adhesion and aging resistance of the coating are obviously decreased; for the comparative example 3, the neutral salt spray resistance and aging resistance of the coating are obviously decreased, the temperature change resistance is unqualified, and there is powdering phenomenon; for the comparative example 4, the corrosion resistance of the coating is obviously changed, the acid, alkali and salt corrosion resistance is obviously poor, and there is cracking phenomenon, which indicates that the above raw materials play different roles in the coating system and cannot be directly replaced; for the comparative example 5, the corrosion resistance is obviously decreased, and there is cracking phenomenon; for the comparative example 6, the aging resistance and temperature change resistance of the coating are obviously deteriorated; for the comparative example 7, the adhesion and aging resistance of the coating are obviously deteriorated.

[0076] It can be seen that, by reasonable collocation of various raw materials, the coating of the present application can synergistically enhance the waterproof property, corrosion resistance and aging resistance, is safe and environmentally friendly to use, can play a significant protective role on the color steel tile as a color steel tile coating, and has obvious popularization and practical value.

[0077] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application, and other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the present application.

Claims

1. An oil-based, environmentally friendly, polymeric anti-corrosion and waterproof coating, characterized in that: The raw materials are prepared by the following weight parts: styrene-ethylene / propylene-styrene block copolymer 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, inorganic filler 7-50 parts, defoaming agent 0.1-2 parts, antioxidant 0.1-2 parts, ultraviolet absorber 0.1-2 parts, light resistance agent 0.1-1 part, environmentally friendly solvent 25-70 parts, and perfume 0-1 part.

2. The oil-based, environmentally friendly, high-molecular anti-corrosion and waterproof coating of claim 1, characterized in that: The inorganic filler is a combination of two or more of mica powder, titanium white powder, mica iron oxide gray, nano-silicon dioxide, and nano-titanium dioxide.

3. The oil-based, environmentally friendly, high-molecular anti-corrosion and waterproof coating according to claim 2, characterized in that: The defoaming agent is at least one of polyether-modified silicon defoaming agent and polyether defoaming agent.

4. The oil-based, environmentally friendly, high-molecular anti-corrosion and waterproof coating of claim 3, characterized in that: The antioxidant includes antioxidant I and antioxidant II, and the antioxidant I and the antioxidant II are respectively selected from hindered phenol antioxidant or phosphite antioxidant, and the mass ratio of the antioxidant I to the antioxidant II is (0.1-1):(0.1-0.5).

5. The oil-based, environmentally friendly, polymer anticorrosive and waterproof coating material according to claim 4, characterized in that: The ultraviolet absorber includes ultraviolet absorber I and ultraviolet absorber II, and the ultraviolet absorber I and the ultraviolet absorber II are respectively selected from benzotriazole ultraviolet absorber, benzophenone ultraviolet absorber, or triazine ultraviolet absorber, and the mass ratio of the ultraviolet absorber I to the ultraviolet absorber II is (0.1-1.2):(0.1-0.8).

6. The oil-based, environmentally friendly, polymer anticorrosive and waterproof coating material according to claim 5, characterized in that: The light resistance agent is kaolin or barium sulfate.

7. The oil-based, environmentally friendly, polymer anticorrosive and waterproof coating material according to claim 6, characterized in that: The environmentally friendly solvent includes environmentally friendly solvent I and environmentally friendly solvent II, and the environmentally friendly solvent I and the environmentally friendly solvent II are respectively selected from ester solvent, and the mass ratio of the environmentally friendly solvent I to the environmentally friendly solvent II is (15-40):(10-30).

8. The oil-based, environmentally friendly, polymer anticorrosive and waterproof coating material according to claim 7, characterized in that: The perfume is at least one of limonene, linalool, menthol, benzyl acetate, and gamma-nonalactone.

9. The oil-based, environmentally friendly, polymer anticorrosive and waterproof coating material according to claim 8, characterized in that: The raw materials are prepared by the following weight parts: styrene-ethylene / propylene-styrene block copolymer 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, mica powder 5-20 parts, titanium white powder 1-8 parts, mica iron oxide gray 1-8 parts, nano-silicon dioxide 0.5-5 parts, nano-titanium dioxide 0.1-3 parts, defoaming agent 0.1-2 parts, antioxidant I 0.1-1 part, antioxidant II 0.1-0.5 part, ultraviolet absorber I 0.1-1.2 part, ultraviolet absorber II 0.1-0.8 part, light resistance agent 0.1-1 part, environmentally friendly solvent I 15-40 parts, environmentally friendly solvent II 10-30 parts, and perfume 0-1 part.

10. The preparation method of the oil-based environment-friendly high polymer anticorrosive waterproof coating according to any one of claims 1-9, characterized in that: The method includes the following steps: The styrene-ethylene / propylene-styrene block copolymer, polyisobutylene, terpene resin, poly-alpha-methylstyrene resin, A81 resin, and environmentally friendly solvent are mixed and dissolved at 60-80°C to obtain a base; the inorganic filler, defoaming agent, antioxidant, ultraviolet absorber, light resistance agent, and perfume are sequentially added to the base at a temperature below 50°C, and stirred and left to obtain a product.

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