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CN110003788B - Water-based single-component nano-modified self-crosslinking weather-resistant finish paint - Google Patents

Water-based single-component nano-modified self-crosslinking weather-resistant finish paint Download PDF

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CN110003788B
CN110003788B CN201910244159.0A CN201910244159A CN110003788B CN 110003788 B CN110003788 B CN 110003788B CN 201910244159 A CN201910244159 A CN 201910244159A CN 110003788 B CN110003788 B CN 110003788B
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weather
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titanium dioxide
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finish paint
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CN110003788A (en
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肖洪健
谢秋梅
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Guangdong Green Earth Chemical Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/68—Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C221/00—Preparation of compounds containing amino groups and doubly-bound oxygen atoms bound to the same carbon skeleton
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/48—Stabilisers against degradation by oxygen, light or heat
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Inorganic Chemistry (AREA)
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Abstract

The invention belongs to the field of coatings, and particularly relates to a water-based single-component nano modified self-crosslinking type weather-resistant finish paint which is prepared from the following components in parts by weight: 80-100 parts of acrylic modified polyurethane emulsion, 20-25 parts of nano titanium dioxide, 5-10 parts of weather-resistant auxiliary agent, 0.3-0.8 part of pH regulator, 0.8-1.5 parts of drier, 0.5-1 part of dispersant, 0.6-1.3 parts of defoaming agent, 0.5-1 part of flatting agent and 8-15 parts of deionized water. The nano titanium dioxide and the weather-resistant auxiliary agent are added into the waterborne single-component nano modified self-crosslinking weather-resistant finish paint, the addition of the nano titanium dioxide is beneficial to improving various performances of a paint film such as water resistance, acid and alkali resistance, corrosion resistance and the like, the nano titanium dioxide has very strong ultraviolet absorption capacity and is also beneficial to improving the weather resistance of the paint film, and in addition, the nano titanium dioxide and the weather-resistant auxiliary agent have synergistic effect, so that the weather resistance of the paint film can be obviously improved; the nano titanium dioxide modified by the silane coupling agent KH550 can be better dispersed in a system, and the function of the nano titanium dioxide can be better exerted.

Description

Water-based single-component nano-modified self-crosslinking weather-resistant finish paint
Technical Field
The invention belongs to the field of coatings, and particularly relates to a water-based single-component nano modified self-crosslinking weather-resistant finish paint.
Background
The paint is a continuous film which is coated on the surface of a protected or decorated object and can form firm adhesion with the object to be coated, and the finish paint is used as a part which is directly contacted with polluted media such as sunlight, air, water and the like and needs to be subjected to long-term climate tests, such as comprehensive damage caused by illumination, cold and heat, wind and rain and the like. Once the finish fails to withstand these challenges and problems of blistering, cracking, and even chalking, flaking, etc. occur, the substrate can no longer be asked to provide protection or decoration, resulting in failure. Therefore, the weather resistance of the finish paint is a very important index, and determines the service life of the finish paint and the base product.
Chinese patent document CN108300221A discloses a long-acting weather-resistant acrylic polyurethane finish paint for engineering machinery, which is a two-component acrylic polyurethane coating, wherein the main paint component comprises 40-65 parts by weight of high-solid low-viscosity thermosetting hydroxy acrylic resin; 12-18 parts of stearic acid modified polyurethane resin; 10-15 parts of iron-titanium coloring pigment; 15-25 parts of pigment and filler; the auxiliary agent is conventional dosage, and the total weight is 0.5-2 parts; 7-10 parts of environment-friendly special solvent for acrylic polyurethane; the curing agent component comprises 80-90 parts by weight of toluene diisocyanate; 10-20 parts of n-butyl acetate; the main paint component and the curing agent component are mixed according to the weight ratio of 4: 1, 20 percent of acrylic polyurethane special solvent in parts by weight of the main paint component is added to obtain the acrylic polyurethane finish paint, and the prepared finish paint has good adherence to metal substrates, wood products and the like and good weather resistance, but the added organic solvent has certain influence on the environment.
Disclosure of Invention
In order to meet the requirements of the finish on environmental protection and weather resistance, the invention discloses a water-based single-component nano modified self-crosslinking weather-resistant finish, which effectively improves the water resistance, acid and alkali resistance, aging resistance and other properties of the acrylic modified polyurethane finish by adding nano titanium dioxide and a weather-resistant auxiliary agent, and obviously improves the weather resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight:
80-100 parts of acrylic modified polyurethane emulsion
20-25 parts of nano titanium dioxide
5-10 parts of weather-resistant auxiliary agent
0.3-0.8 part of pH regulator
0.8-1.5 parts of drier
0.5 to 1 portion of dispersant
0.6 to 1.3 portions of defoaming agent
0.5-1 part of flatting agent
8-15 parts of deionized water.
Preferably, the particle size of the nano titanium dioxide is 10 to 50 nm.
Preferably, the nano titanium dioxide is modified by a silane coupling agent.
Preferably, the silane coupling agent is a silane coupling agent KH 550.
Preferably, the structural formula of the weather-resistant auxiliary agent is as follows:
Figure BDA0002010559740000021
the preparation method of the weather-resistant auxiliary agent comprises the following steps:
(1) heating 1-naphthylamine to melt, dehydrating for 2-3h at the temperature of 110-180 ℃, then adding p-phenylenediamine and p-aminobenzene sulfonic acid (the molar ratio of the 1-naphthylamine to the p-phenylenediamine is 1.5:1, and the p-aminobenzene sulfonic acid is proper), slowly heating to the temperature of 230-240 ℃ under stirring for condensation reaction, absorbing ammonia generated in the reaction process by water and sulfuric acid, stopping the reaction after no ammonia is discharged, neutralizing by soda until the pH is neutral, carrying out high vacuum fractionation, recovering unreacted naphthylamine and p-phenylenediamine, distilling a product 1 out, and carrying out condensation crystallization, wherein the reaction equation is as follows:
Figure BDA0002010559740000031
(2) heating 4, 6-dibenzoyl-1, 3-phenylenediamine to melt, dehydrating for 2-3h at the temperature of 150-:
Figure BDA0002010559740000041
(3) heating the product 2 to melt, dehydrating for 2-3h at the temperature of 160-:
Figure BDA0002010559740000051
preferably, the pH regulator is one or more of ammonia water, monoethanolamine, diethanolamine, triethanolamine and 2-amino-2-methyl-1-propanol.
Preferably, the drier is an organotin drier.
Preferably, the preparation method of the waterborne single-component nano modified self-crosslinking weather-resistant finish paint comprises the following steps:
(1) uniformly stirring the acrylic acid modified polyurethane emulsion and deionized water in a container, then adding nano titanium dioxide, and stirring for 5-15min at the temperature of 30-50 ℃, wherein the stirring speed is 600-;
(2) adding a weather-resistant auxiliary agent, a pH regulator, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step (1), and stirring at the temperature of 30-50 ℃ for 5-10min at the stirring speed of 400-500 r/min;
(3) and (3) cooling the mixed solution obtained in the step (2) to room temperature, adding a drier, and stirring for 3-5min at the stirring speed of 400-.
The invention has the following beneficial effects: (1) the nano titanium dioxide and the weather-resistant auxiliary agent are added into the waterborne single-component nano modified self-crosslinking weather-resistant finish paint, the addition of the nano titanium dioxide is beneficial to improving various performances of a paint film such as water resistance, acid and alkali resistance, corrosion resistance and the like, the nano titanium dioxide has very strong ultraviolet absorption capacity and is also beneficial to improving the weather resistance of the paint film, and in addition, the nano titanium dioxide and the weather-resistant auxiliary agent have synergistic effect, so that the weather resistance of the paint film can be obviously improved;
(2) the nano titanium dioxide modified by the silane coupling agent KH550 can be better dispersed in a system, so that the function of the nano titanium dioxide can be better exerted;
(3) the weather-resistant auxiliary agent contains a benzophenone structure, can strongly absorb ultraviolet rays and greatly reduce damage of the ultraviolet rays to a paint film, the N-phenyl-alpha-naphthylamine structure in the weather-resistant auxiliary agent can play an effective protection role on aging and fatigue caused by oxygen, heat and flexure, and has a certain inhibition role on harmful metals, the diaminodiphenylmethane structure in the weather-resistant auxiliary agent has the functions of oxidation resistance and aging protection, and has good chemical resistance, water resistance and heat distortion resistance, and the added weather-resistant auxiliary agent can obviously improve the water resistance, aging resistance and the like of the paint film;
(4) the weather-resistant auxiliary agent has an enlarged molecular structure, is easy to be stabilized in a system and plays a role for a long time compared with a micromolecule additive, and is not easy to separate out, so that the basic structure of the system cannot be adversely affected.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 shows the NMR spectrum of product 1 of the invention.
FIG. 2 is a nuclear magnetic resonance spectrum of product 2 of the present invention.
FIG. 3 is a nuclear magnetic resonance spectrum of the product 3 (i.e., weathering aid) of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to examples.
The preparation method of the water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following steps:
(1) uniformly stirring the acrylic acid modified polyurethane emulsion and deionized water in a container, then adding nano titanium dioxide, and stirring for 5-15min at the temperature of 30-50 ℃, wherein the stirring speed is 600-;
(2) adding a weather-resistant auxiliary agent, a pH regulator, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step (1), and stirring at the temperature of 30-50 ℃ for 5-10min at the stirring speed of 400-500 r/min;
(3) and (3) cooling the mixed solution obtained in the step (2) to room temperature, adding a drier, and stirring for 3-5min at the stirring speed of 400-.
FIGS. 1-3 are nuclear magnetic resonance spectra of various products produced during the preparation of the weathering aid of the present invention.
FIG. 1 shows the NMR spectra of product 1, with the following NMR data: δ is 9.08 to 9.17(a, 1H), δ is 8.15 to 8.22(b, 2H), δ is 7.79 to 7.82(c, 1H), δ is 7.49 to 7.63(d, 4H), δ is 7.01 to 7.04(e, 2H), δ is 6.05 to 6.08(f, 2H), δ is 4.51 to 5.53(g, 2H). The absorption peak and the integral value of each proton obtained by the test are completely consistent with those of the proton in the product 1, which indicates that the product 1 is obtained.
FIG. 2 is a NMR spectrum of product 2 with the following NMR data: δ is 11.70 to 11.72(a, 1H), δ is 9.10 to 9.12(b, 1H), δ is 6.65 to 8.13(c, benzene ring in the structure of product 2), δ is 6.26 to 6.28(d, 2H). The absorption peak and the integral value of each proton obtained by the test are completely consistent with those of the proton in the product 2, which indicates that the product 2 is obtained.
Fig. 3 is a nuclear magnetic resonance spectrum of product 3 (i.e., weathering aid) with the following nuclear magnetic data: δ is 12.26 to 12.28(a, 1H), δ is 11.68 to 11.71(b, 1H), δ is 9.10 to 9.12(c, 1H), δ is 6.44 to 8.13(d, benzene ring in the structure of product 3), δ is 4.90 to 4.92(e, 2H), δ is 3.81 to 3.83(f, 2H). The absorption peak and the integral value of each proton obtained by the test are completely consistent with those of the proton in the product 3 (namely, the weather-resistant auxiliary), which indicates that the product 3 (namely, the weather-resistant auxiliary) is obtained.
Example 1
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 22 parts of KH550 modified nano titanium dioxide, 8 parts of weather-resistant auxiliary agent, 0.5 part of ammonia water, 1.2 parts of stannous octoate, TEGO 7000.8 parts, TEGO 9001 part, TEGO 4500.7 parts and 11 parts of deionized water.
Example 2
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 80 parts of acrylic acid modified polyurethane emulsion, 20 parts of KH550 modified nano titanium dioxide, 10 parts of weather-resistant auxiliary agent, 0.2 part of monoethanolamine, 0.1 part of diethanolamine, 0.8 part of dibutyltin dilaurate, 6550.7 parts of TEGO, 9800.6 parts of TEGO 4000.5 parts and 8 parts of deionized water.
Example 3
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 100 parts of acrylic acid modified polyurethane emulsion, 25 parts of KH550 modified nano titanium dioxide, 5 parts of weather-resistant auxiliary agent, 0.8 part of triethanolamine, 1.5 parts of dibutyltin dilaurate, 6510.5 parts of TEGO, 9701.3 parts of TEGO 4101 parts of deionized water.
Example 4
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 20 parts of KH550 modified nano titanium dioxide, 7 parts of weather-resistant auxiliary agent, 0.6 part of 2-amino-2-methyl-1-propanol, 1 part of stannous octoate, 6520.8 parts of TEGO, 9601 parts of TEGO, 4100.7 parts of TEGO and 10 parts of deionized water.
Comparative example 1
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 8 parts of weather-resistant auxiliary agent, 0.5 part of ammonia water, 1.2 parts of stannous octoate, 7000.8 parts of TEGO, 9001 part of TEGO, 4500.7 parts of TEGO and 11 parts of deionized water.
Comparative example 2
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 22 parts of KH550 modified nano titanium dioxide, 0.5 part of ammonia water, 1.2 parts of stannous octoate, 7000.8 parts of TEGO, 9001 part of TEGO, 4500.7 parts of TEGO and 11 parts of deionized water.
Comparative example 3
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 22 parts of KH550 modified nano titanium dioxide, 3 parts of 4, 6-dibenzoyl-1, 3-phenylenediamine, 13 parts of product, 2 parts of 4, 4' -diaminodiphenylmethane, 0.5 part of ammonia water, 1.2 parts of stannous octoate, 7000.8 parts of TEGO 9001 parts, 4500.7 parts of TEGO and 11 parts of deionized water.
Comparative example 4
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 22 parts of KH550 modified nano titanium dioxide, 8 parts of 4, 6-dibenzoyl-1, 3-phenylenediamine, 0.5 part of ammonia water, 1.2 parts of stannous octoate, 7000.8 parts of TEGO, 9001 parts of TEGO, 4500.7 parts of TEGO and 11 parts of deionized water.
Comparative example 5
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 22 parts of KH550 modified nano titanium dioxide, 18 parts of product, 0.5 part of ammonia water, 1.2 parts of stannous octoate, 7000.8 parts of TEGO, 9001 part of TEGO, 4500.7 parts of TEGO and 11 parts of deionized water.
Comparative example 6
The water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following components in parts by weight: 90 parts of acrylic acid modified polyurethane emulsion, 22 parts of KH550 modified nano titanium dioxide, 8 parts of 4, 4' -diaminodiphenylmethane, 0.5 part of ammonia water, 1.2 parts of stannous octoate, 7000.8 parts of TEGO, 9001 part of TEGO, 4500.7 parts of TEGO and 11 parts of deionized water.
The tests for the properties of the paint films prepared in the examples and comparative examples are shown in Table 1.
TABLE 1
Figure BDA0002010559740000091
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. A water-based single-component nano-modified self-crosslinking weather-resistant finish paint is characterized in that: the composition comprises the following components in parts by weight:
80-100 parts of acrylic modified polyurethane emulsion
20-25 parts of nano titanium dioxide
5-10 parts of weather-resistant auxiliary agent
0.3-0.8 part of pH regulator
0.8-1.5 parts of drier
0.5 to 1 portion of dispersant
0.6 to 1.3 portions of defoaming agent
0.5-1 part of flatting agent
8-15 parts of deionized water;
the structural formula of the weather-resistant auxiliary agent is as follows:
Figure FDA0002660339950000011
2. the waterborne single-component nano-modified self-crosslinking weather-resistant finish paint of claim 1, characterized in that: the particle size of the nano titanium dioxide is 10-50 nm.
3. The waterborne single-component nano-modified self-crosslinking weather-resistant finish paint of claim 1, characterized in that: the nano titanium dioxide is modified by a silane coupling agent.
4. The waterborne single-component nano-modified self-crosslinking weather-resistant finish paint of claim 3, characterized in that: the silane coupling agent is a silane coupling agent KH 550.
5. The waterborne single-component nano-modified self-crosslinking weather-resistant finish paint of claim 1, characterized in that: the pH regulator is one or more of ammonia water, monoethanolamine, diethanolamine, triethanolamine and 2-amino-2-methyl-1-propanol.
6. The waterborne single-component nano-modified self-crosslinking weather-resistant finish paint of claim 1, characterized in that: the drier is an organic tin drier.
7. The waterborne single-component nano-modified self-crosslinking weather-resistant finish paint of claim 1, characterized in that: the preparation method of the water-based single-component nano modified self-crosslinking weather-resistant finish paint comprises the following steps:
(1) uniformly stirring the acrylic acid modified polyurethane emulsion and deionized water in a container, then adding nano titanium dioxide, and stirring for 5-15min at the temperature of 30-50 ℃, wherein the stirring speed is 600-;
(2) adding a weather-resistant auxiliary agent, a pH regulator, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step (1), and stirring at the temperature of 30-50 ℃ for 5-10min at the stirring speed of 400-500 r/min;
(3) and (3) cooling the mixed solution obtained in the step (2) to room temperature, adding a drier, and stirring for 3-5min at the stirring speed of 400-.
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