CN113462248A - High-stability water-based paint suitable for various substrates and preparation method thereof - Google Patents
High-stability water-based paint suitable for various substrates and preparation method thereof Download PDFInfo
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- CN113462248A CN113462248A CN202110937220.7A CN202110937220A CN113462248A CN 113462248 A CN113462248 A CN 113462248A CN 202110937220 A CN202110937220 A CN 202110937220A CN 113462248 A CN113462248 A CN 113462248A
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- 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
- C09D7/63—Additives non-macromolecular organic
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Abstract
The invention relates to a high-stability water-based paint suitable for various substrates and a preparation method thereof, wherein the high-stability water-based paint comprises the following components in parts by weight: 20-35 parts of epoxy ester modified acrylic resin, 0.3-1 part of neutralizing agent, 18-35 parts of deionized water, 2-15 parts of pigment, 3.5-8.5 parts of filler, 0.2-1.5 parts of water-based cross-linking agent, 0.1-0.15 part of defoaming agent, 0.1-0.15 part of base material wetting agent, 0.1-0.15 part of flatting agent, 0.1-0.15 part of dispersing agent and 1-3 parts of cosolvent. The invention has wide source of required raw materials and simple preparation flow, and the prepared water-based paint has long-term storage stability, is suitable for various substrates, shows excellent adhesive force and has wide market application value.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to high-stability water-based paint suitable for various substrates and a preparation method thereof.
Background
Energy conservation, emission reduction and environmental friendliness are subjects of social development in the present day, and coating products are developing towards greenization. The water-based paint contains very low VOCs (volatile organic compounds) because water is used as a solvent or a dispersion medium, has the characteristics of environmental protection, small smell and even no smell, powerfully ensures the health of constructors, and accelerates the development of water-based paint products to a great extent.
However, compared with oil-based coatings, water-based coatings have certain differences in adhesion, weather resistance, storage stability and the like, and the current commercially available water-based coatings cannot be adapted to various substrates, which greatly limits the application of the water-based coatings in more fields. Therefore, the development of the high-stability aqueous solution applicable to various substrates has great market application value.
Disclosure of Invention
Aiming at the technical problems of the water-based paint sold in the market, the invention provides a high-stability water-based paint suitable for various substrates and a preparation method thereof. The water-based paint has good storage stability, is suitable for various substrates, has high drying speed of a coating film, and does not have the phenomena of foaming and falling off after being soaked in water for 10 to 14.
In order to solve the technical problems, the invention adopts the following technical scheme:
a high-stability water-based paint suitable for various substrates comprises the following raw materials in parts by weight: 20-35 parts of epoxy ester modified acrylic resin, 0.3-1 part of neutralizing agent, 18-35 parts of deionized water, 2-15 parts of pigment, 3.5-8.5 parts of filler, 0.2-1.5 parts of water-based cross-linking agent, 0.1-0.15 part of defoaming agent, 0.1-0.15 part of base material wetting agent, 0.1-0.15 part of flatting agent, 0.1-0.15 part of dispersing agent and 1-3 parts of cosolvent.
Further, the epoxy ester modified acrylic resin is provided by Nanyang Xinggang Co., Ltd, and has an acid value of 18 to 24 mgKOH/g.
Further, the neutralizing agent is any one of triethylamine or N-N dimethylethanolamine.
Further, the pigment is any one of a red pigment, a white pigment and a blue pigment; the red pigment is molybdenum chrome red, the white pigment is rutile titanium dioxide, and the blue pigment is phthalocyanine blue; the filler is common commercial high-gloss barium.
Further, the aqueous cross-linking agent is an epoxy silane compound, and the epoxy silane compound isβ- (3, 4-epoxycyclohexyl) ethyltriethoxysilane,β- (3, 4 epoxycyclohexyl) ethyltrimethoxysilane,γGlycidyl ether oxypropyltrimethoxysilane orγ-glycidyl ether oxypropyl methylAny of the methyldiethoxysilanes.
Further, the defoaming agent is any one of BYK-025 or BYK-017 waterborne defoaming agents.
Further, the base material wetting agent is any one of AIOX-6727 or BYK-341 aqueous base material wetting agents.
Further, the leveling agent is an AIOX-6141 aqueous leveling agent.
Further, the dispersant is any one of AIOX-3781 or BYK-154 aqueous dispersant.
Further, the cosolvent is any one of diethylene glycol methyl ether, diethylene glycol butyl ether or dipropylene glycol butyl ether.
The preparation method of the water-based paint comprises the following steps:
(1) putting the epoxy ester modified acrylic resin and a neutralizer into a stirrer, stirring for 10-20min at the rotating speed of 200r/min for 150-;
(2) and (2) putting the pigment, the filler, the defoaming agent, the base material wetting agent, the flatting agent, the dispersing agent and the cosolvent into the stirrer in the step (1), and stirring for about 1h at the rotating speed of 1000-1500r/min to obtain the high-stability water-based paint suitable for various substrates.
The high-stability water-based paint suitable for various substrates prepared by the invention has good fluidity, good storage stability, excellent adhesion, hardness and adhesion of the dried coating film reaching 2-3H and 0-1 level respectively, and no foaming or falling phenomenon after being soaked in water for 10-14 days.
Compared with the prior art, the invention has the beneficial effects that:
(1) the acrylic resin modified by epoxy ester is clear and transparent in appearance and has good film-forming property. The resin has the characteristics of both epoxy resin and acrylic resin, and has excellent adhesive force and weather resistance after film forming. The selected resin has excellent dispersibility and compatibility with various pigments, and the pigments show stronger covering power and coloring strength in the resin.
(2) In the process of preparing the water-based paint, an epoxy silane compound is selected as a water-based cross-linking agent, the carboxyl group in the resin dispersoid and the epoxy group in the cross-linking agent react to crosslink, and in the film-forming process, alkoxy is hydrolyzed and condensed to form silicon-oxygen bond crosslinking, so that the crosslinking density of a coating film is increased, and the adhesive force of the coating is improved. Compared with other crosslinking agents, the water-based crosslinking agent not only increases the affinity of the pigment and the filler with the resin and prolongs the storage period of the water-based paint, but also is used in a small amount.
(3) The invention has wide source of required raw materials and simple preparation process, and the prepared water-based paint has excellent adhesive force with various substrates.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example 1
The high-stability water-based paint suitable for various substrates comprises the following components in parts by mass:
epoxy ester modified acrylic resin: 20 parts of (1);
neutralizing agent: 0.3 part of N-N dimethylethanolamine;
deionized water: 18 parts of a mixture;
pigment: 2 parts of phthalocyanine blue;
high light barium: 8 parts of a mixture;
aqueous crosslinking agent:β- (3, 4 epoxycyclohexyl) ethyltriethoxysilane, 0.2 parts;
defoaming agent: 0.1 part of BYK-025;
substrate wetting agent: 0.1 part of BYK-241;
leveling agent: 0.1 part of AIOX-6141;
dispersing agent: 0.1 part of BYK-154;
auxiliary agent: diethylene glycol butyl ether, 2 parts.
The preparation method of the high-stability water-based paint suitable for various substrates comprises the following steps:
(1) putting the epoxy ester modified acrylic resin and N-dimethylethanolamine into a stirrer, stirring at the rotating speed of 150r/min for 10min, sequentially adding deionized water,β- (3, 4 epoxycyclohexyl) ethyltriethoxysilane, stirring at a rotation speed of 200r/min for 15 min;
(2) adding phthalocyanine blue, high-gloss barium, BYK-025, BYK-241, AIOX-6141, BYK-154 and diethylene glycol butyl ether into the stirrer, and stirring at the rotating speed of 1000r/min for 1h to obtain the water-based paint.
Example 2
The high-stability water-based paint suitable for various substrates comprises the following components in parts by mass:
epoxy ester modified acrylic resin: 32 parts of (1);
neutralizing agent: 1 part of triethylamine;
deionized water: 28 parts of (1);
pigment: 12 parts of molybdenum chrome red and 3 parts of titanium dioxide;
high light barium: 7 parts;
aqueous crosslinking agent:β- (3, 4 epoxycyclohexyl) ethyltrimethoxysilane, 1.5 parts;
defoaming agent: 0.14 part of BYK-025;
substrate wetting agent: 0.14 part of BYK-341;
leveling agent: AIOX-6141, 0.14 parts;
dispersing agent: AIOX-3781, 0.14 parts;
auxiliary agent: 3 parts of dipropylene glycol methyl ether.
The preparation method of the high-stability water-based paint suitable for various substrates comprises the following steps:
(1) putting the epoxy ester modified acrylic resin and triethylamine into a stirrer, stirring at the rotating speed of 200r/min for 20min, and then sequentially adding deionized water,β- (3, 4 epoxycyclohexyl) ethyltrimethoxysilane, and stirring for 20min at the rotating speed of 250 r/min;
(2) and putting molybdenum chrome red, titanium dioxide, high-gloss barium, BYK-025, BYK-341, AIOX-6141, AIOX-3781 and dipropylene glycol methyl ether into the stirrer, and stirring at the rotating speed of 1500r/min for 1h to obtain the water-based paint.
Example 3
The high-stability water-based paint suitable for various substrates comprises the following components in parts by mass:
epoxy ester modified acrylic resin: 25 parts of (1);
neutralizing agent: 0.8 part of triethylamine;
deionized water: 25 parts of (1);
pigment: 10 parts of molybdenum chrome red;
high light barium: 6 parts of (1);
aqueous crosslinking agent:β- (3, 4 epoxycyclohexyl) ethyltrimethoxysilane, 0.5 parts;
defoaming agent: 0.12 part of BYK-025;
substrate wetting agent: AIOX-6727, 0.12 parts;
leveling agent: 0.12 portion of AIOX-6141;
dispersing agent: AIOX-3781, 0.12 parts;
auxiliary agent: diethylene glycol monomethyl ether, 1 part.
The preparation method of the high-stability water-based paint suitable for various substrates comprises the following steps:
(1) putting the epoxy ester modified acrylic resin and N-dimethylethanolamine into a stirrer, stirring for 15min at the rotating speed of 150r/min, sequentially adding deionized water,β- (3, 4 epoxycyclohexyl) ethyltrimethoxysilane, and stirring at the rotating speed of 200r/min for 18 min;
(2) adding molybdenum chrome red, high-gloss barium, BYK-025, AIOX-6727, AIOX-6141, AIOX-3781 and diethylene glycol monomethyl ether into the stirrer, and stirring at the rotating speed of 1200r/min for 1h to obtain the water-based paint.
Example 4
The high-stability water-based paint suitable for various substrates comprises the following components in parts by mass:
epoxy ester modified acrylic resin: 30 parts of (1);
neutralizing agent: 1 part of triethylamine;
deionized water: 28 parts of (1);
pigment: 8 parts of titanium dioxide;
high light barium: 6.5 parts;
aqueous crosslinking agent:γglycidyl ether oxypropyltrimethoxysilane, 0.6 part;
defoaming agent: 0.12 part of BYK-017;
substrate wetting agent: AIOX-6727, 0.12 parts;
leveling agent: 0.12 portion of AIOX-6141;
dispersing agent: AIOX-3781, 0.12 parts;
auxiliary agent: dipropylene glycol butyl ether, 2 parts.
The preparation method of the high-stability water-based paint suitable for various substrates comprises the following steps:
(1) putting the epoxy ester modified acrylic resin and triethylamine into a stirrer, stirring for 15min at the rotating speed of 180r/min, and then sequentially adding deionized water,γGlycidyl ether oxypropyltrimethoxysilane, at a rate of 250r/min for 20 min;
(2) and (3) putting titanium dioxide, high-gloss barium, BYK-017, AIOX-6727, AIOX-6141, AIOX-3781 and dipropylene glycol butyl ether into the stirrer, and stirring at the rotating speed of 1500r/min for 1h to obtain the water-based paint.
Example 5
The high-stability water-based paint suitable for various substrates comprises the following components in parts by mass:
epoxy ester modified acrylic resin: 35 parts of (B);
neutralizing agent: 1 part of N-N dimethylethanolamine;
dispersing agent: 35 parts of deionized water;
pigment: 15 parts of molybdenum chrome red;
high light barium: 8.5 parts;
aqueous crosslinking agent:γ1 part of glycidylethoxypropylmethyldiethoxysilane;
defoaming agent: 0.15 part of BYK-025;
substrate wetting agent: 0.15 part of BYK-341;
leveling agent: 0.15 portion of AIOX-6141;
dispersing agent: AIOX-3781, 0.15 parts;
auxiliary agent: diethylene glycol butyl ether, 2 parts.
The preparation method of the high-stability water-based paint suitable for various substrates comprises the following steps:
(1) putting the epoxy ester modified acrylic resin and triethylamine into a stirrer, stirring at the rotating speed of 200r/min for 20min, and then sequentially adding deionized water,γGlycidyl ether oxypropyl methyldiethoxysilane, stirred at 300r/min for 20 min;
(2) and putting molybdenum chrome red, high-gloss barium, BYK-025, BYK-341, AIOX-6141, AIOX-3781 and diethylene glycol butyl ether into the stirrer, and stirring at the rotating speed of 1500r/min for 1h to obtain the water-based paint.
Comparative example 1
Comparative example 1 differs from example 2 in that the resin used is a homemade acrylic resin.
Comparative example 2
Comparative example 2 differs from example 2 in that the aqueous crosslinker added is a carbodiimide crosslinker.
Comparative example 3
Comparative example 3 differs from example 2 in that the aqueous crosslinker added is trimethylolpropane-tris [ 3- (2-methyl-aziridinyl) ] propionate crosslinker.
In order to further illustrate the high-stability water-based paint applicable to various substrates, the performances of the water-based paints prepared by the methods of examples 1-5 and comparative examples 1-3 are tested correspondingly, and the test methods are as follows:
surface dry time test: the aqueous coatings of the examples and comparative examples were applied uniformly to a polytetrafluoroethylene plate, dried at a constant temperature of 25 ℃ and the tack-free time of the coatings was tested according to the method of GB 1728-79.
And (3) hardness testing: the hardness of the aqueous coating materials in the examples and comparative examples was tested according to the method of GB/T6739-2006.
And (3) testing the adhesive force: the aqueous coatings of the examples and comparative examples were tested for adhesion according to the method of GB/T9286-1998.
And (3) testing water resistance: the water resistance of the aqueous coatings in the examples and comparative examples was tested using the GB/T1733-1993 standard, and a coating which did not blister, did not peel off, allowed slight discoloration for 96 h was considered to pass.
Testing storage and transportation stability: after the samples of the water-based paints in the examples and comparative examples were stored at a standard temperature of 25 ℃ for 12 months, the samples were regarded as passed if no skinning, sourness, lumps, brush marks, etc. occurred.
The test results are shown in Table 1.
TABLE 1
As can be seen from Table 1, in the preparation process of the water-based paint, the epoxy silane compound is introduced to the branched chain of the epoxy ester modified acrylic resin polymer by the chemical modification method as the water-based cross-linking agent in the embodiments 1 to 5 of the present invention, so as to comprehensively improve the performance of the water-based paint. Compared with the experimental results in the embodiment 2 and the comparative examples 1 to 3, the water-based paint using the epoxy ester modified acrylic resin and the epoxy silane compound as the water-based cross-linking agent has excellent water resistance and storage stability, and shows good adhesion to various substrates.
In conclusion, the waterborne coating provided by the invention improves the comprehensive performance of the waterborne coating by organically combining the epoxy silane compound with the epoxy ester modified acrylic resin. In the film forming process of the paint, the epoxy ester modified acrylic resin main chain of the water-based paint can migrate to the bottom surface of a paint film, so that the adhesive force with different substrates is provided; and the epoxy silane compound crosslinked with the acrylic resin branched chain can migrate to the surface of the paint film, thereby providing low surface tension and increasing the hydrophobicity of the coating, and the aqueous paint has excellent long-term storage stability due to the steric hindrance effect of the epoxy silane, which is incomparable with other aqueous crosslinking agents. Under the dual synergistic effect of the two, the prepared water paint has good comprehensive performance.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The high-stability water-based paint suitable for various substrates is characterized by comprising the following components in parts by weight: 20-35 parts of epoxy ester modified acrylic resin, 0.3-1 part of neutralizing agent, 18-35 parts of deionized water, 2-15 parts of pigment, 3.5-8.5 parts of filler, 0.2-1.5 parts of water-based cross-linking agent, 0.1-0.15 part of defoaming agent, 0.1-0.15 part of base material wetting agent, 0.1-0.15 part of flatting agent, 0.1-0.15 part of dispersing agent and 1-3 parts of cosolvent.
2. The high stability waterborne multi-substrate coating of claim 1, wherein: the acid value of the epoxy ester modified acrylic resin is 18-24 mgKOH/g.
3. The high stability waterborne multi-substrate coating of claim 1, wherein: the neutralizing agent is any one of triethylamine or N-N dimethylethanolamine.
4. The high stability waterborne multi-substrate coating of claim 1, wherein: the pigment is any one of red pigment, white pigment and blue pigment; the red pigment is molybdenum chrome red, the white pigment is rutile titanium dioxide, and the blue pigment is phthalocyanine blue; the filler is common commercial high-gloss barium.
5. The high stability waterborne multi-substrate coating of claim 1, wherein: the water-based cross-linking agent is an epoxy silane compoundβ- (3, 4 epoxycyclohexyl) ethylTriethoxysilane,β- (3, 4 epoxycyclohexyl) ethyltrimethoxysilane,γGlycidyl ether oxypropyltrimethoxysilane orγAny of glycidyloxypropylmethyldiethoxysilane.
6. The high stability waterborne multi-substrate coating of claim 1, wherein: the defoaming agent is any one of BYK-025 or BYK-017 waterborne defoaming agents.
7. The high stability waterborne multi-substrate coating of claim 1, wherein: the base material wetting agent is any one of AIOX-6727 or BYK-341 water-based base material wetting agents.
8. The high stability waterborne multi-substrate coating of claim 1, wherein: the leveling agent is an AIOX-6141 aqueous leveling agent; the dispersant is any one of AIOX-3781 or BYK-154 aqueous dispersant; the cosolvent is any one of diethylene glycol methyl ether, diethylene glycol butyl ether or dipropylene glycol butyl ether.
9. The method for preparing an aqueous coating material according to any one of claims 1 to 8, characterized by comprising the steps of:
(1) putting the epoxy ester modified acrylic resin and a neutralizer into a stirrer, stirring for 10-20min at the rotating speed of 200r/min for 150-;
(2) and (2) putting the pigment, the filler, the defoaming agent, the base material wetting agent, the flatting agent, the dispersing agent and the cosolvent into the stirrer in the step (1), and stirring for 1h at the rotating speed of 1000-1500r/min to obtain the high-stability water-based paint applicable to various substrates.
10. The method of claim 9, wherein: the prepared high-stability water-based paint suitable for various substrates has good flowing property, excellent storage stability, excellent adhesive force, hardness and adhesive force of a coating film after being dried reach 2-3H and 0-1 level respectively, and no foaming or falling phenomenon exists after the coating film is soaked in water for 10-14 days.
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| CN117264481A (en) * | 2023-09-26 | 2023-12-22 | 广东百川化工有限公司 | Universal yellowing-resistant single-component finish paint applicable to various priming paint and preparation method thereof |
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