CN116063910A - Aspartic acid polyurea primer and preparation method thereof - Google Patents
Aspartic acid polyurea primer and preparation method thereof Download PDFInfo
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- CN116063910A CN116063910A CN202111293192.6A CN202111293192A CN116063910A CN 116063910 A CN116063910 A CN 116063910A CN 202111293192 A CN202111293192 A CN 202111293192A CN 116063910 A CN116063910 A CN 116063910A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming 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
- C09D5/08—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
- 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
-
- 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
- C09D7/65—Additives macromolecular
-
- 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
- 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
- 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
-
- 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
- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
Abstract
The invention relates to an ultralow VOC (volatile organic compound) aspartic acid polyurea primer suitable for engineering machinery coating, which comprises the following raw materials in parts by weight: 25-35 parts of aspartic acid polyurea resin, 3-7 parts of petroleum resin, 1-4 parts of adhesion promoting resin, 3-10 parts of dispersing agent, 0.5-1.5 parts of defoaming auxiliary agent, 50-60 parts of pigment and filler mixture and 5-10 parts of organic solvent. The aspartic acid polyurea primer simultaneously contains various resins with different molecular weights to play a synergistic effect, and is matched with pigment fillers, dispersing agents and the like with special surface characteristics, so that the ultra-low VOC is realized while the covering power, the corrosion resistance, the construction stability and the salt spray resistance of the primer are ensured. The invention also relates to a preparation method and application of the ultra-low VOC aspartic acid polyurea primer.
Description
Technical Field
The invention relates to the field of paint. In particular to an ultra-low VOC aspartic acid polyurea primer suitable for engineering machinery coating and a preparation method thereof.
Background
Traditional solvent-based coatings have relatively high construction VOCs (typically greater than 420 g/L), and therefore can introduce significant amounts of contaminants to the environment during construction. A large amount of Volatile Organic Compounds (VOCs) generated in the construction process are discharged into the environment, so that the environment is polluted, and great harm is brought to human health, so that the control of the Volatile Organic Compounds (VOCs) of various chemical products is increasingly strict in all countries around the world.
Under strict environmental protection policy requirements, the current situation that high Volatile Organic Compounds (VOC) are generated in mechanical coating faces heavy pressure, traditional high Volatile Organic Compound (VOC) primer coatings (construction VOC is more than 420 g/L) are limited by national new laws and regulations, the existing coating equipment conditions cannot meet the construction standards of water-based primer coatings, and a large amount of funds are needed to reform the equipment so as to realize the requirements of coating the water-based primer coatings. Thus, the method is applicable to a variety of applications. There is a great need for solvent borne coatings with low Volatile Organic Compounds (VOCs) (construction VOCs less than 250 g/L).
Therefore, there is an urgent need in the art for a solvent-based primer coating of ultra-low Volatile Organic Compounds (VOC), which reduces a large amount of VOC generated during construction while satisfying surface protection and decoration for industrial fields (light and heavy), so as to solve the problems of the prior art.
Disclosure of Invention
According to a first aspect of the present invention, there is provided an ultra-low VOC aspartic acid polyurea primer, the coating film of which meets the requirements of continuous coating operations without the need for baking. The aspartic acid polyurea primer simultaneously contains various resins with different molecular weights to play a synergistic effect, and is matched with pigment fillers, dispersing agents and the like with special surface characteristics, so that the ultra-low VOC is realized while the covering power, the corrosion resistance, the construction stability and the salt spray resistance of the primer are ensured.
The ultra-low VOC aspartic acid polyurea primer comprises the following raw materials in parts by weight:
according to one embodiment of the present invention, the molecular weight of the aspartic acid polyurea resin is 500-600. Specifically, the aspartic acid polyurea resin is such as, but not limited to, F520 aspartic acid resin provided by Shenzhen flying company.
According to an embodiment of the present invention, the petroleum resin has a molecular weight of 1300-1800. Preferably, the petroleum resin is a high Tg petroleum resin, such as, but not limited to, a C9 resin.
According to one embodiment of the invention, the adhesion promoting resin is an LTW resin, such as, but not limited to, LTW resin provided by Digao.
According to an embodiment of the present invention, the dispersant is selected from polyurethane-based high molecular block copolymers or polyacrylate-based high molecular block copolymers. Specifically, the dispersant is a pigment-filler derivative. More specifically, the dispersant is selected from, for example, but not limited to, BYK110 dispersant, DISPERBYK-163 dispersant commercially available from the company Pick chemistry (BYK).
According to one embodiment of the present invention, the defoamer is, for example, but not limited to, a BYK 066N defoamer commercially available from BYK chemical (BYK) corporation.
According to an embodiment of the invention, the pigment filler comprises a rust inhibitive filler and an organic pigment or an inorganic pigment. Specifically, the pigment and filler comprises aluminum tripolyphosphate, zinc oxide, precipitated barium sulfate, mica powder, iron oxide yellow and titanium pigment which are commonly used in industrial coatings.
According to an embodiment of the present invention, the organic solvent is a mixed solvent including a mixture of propylene glycol methyl ether acetate and ethyl acetate. Preferably, the mass ratio of the propylene glycol methyl ether acetate to the ethyl acetate is 1:7.
According to a second aspect of the present invention, there is provided a method for preparing the low-VOC aspartic acid polyurea primer described above suitable for use in engineering machinery coating. The method comprises the following steps:
s1: mixing 25-35 parts of aspartic acid polyurea resin, 3-7 parts of petroleum resin, 1-4 parts of adhesion promoting resin, 3-10 parts of dispersing agent, 0.5-1.5 parts of defoaming auxiliary agent and 1-5 parts of organic solvent, and stirring for 10-15min at a rotation speed of 400-600 rpm;
s2: continuously adding 50-60 parts of pigment and filler mixture under stirring, and continuously stirring for 10-15min at a rotating speed of 400-600 rpm;
s3: and continuously adding 1-5 parts of organic solvent under the stirring state, stirring until the mixture is uniformly mixed, and then grinding and dispersing until the fineness is less than 30 mu m to obtain the ultra-low VOC aspartic acid polyurea primer.
According to a third aspect of the present invention, there is provided a coating system comprising the ultra-low VOC aspartic acid polyurea primer according to the first aspect of the present invention.
According to a fourth aspect of the present invention, there is provided the use of the ultra-low VOC aspartic acid polyurea primer according to the first aspect of the present invention, which is suitable for engineering machinery coating.
The beneficial effects of the invention are as follows:
according to the ultra-low VOC aspartic acid polyurea primer disclosed by the invention, through the synergistic effect of the aspartic acid polyurea resin with different molecular weights, the high Tg petroleum resin and the adhesion promoting resin, and the dispersant, the defoamer and the pigment filler with special surface characteristics are matched, so that the ultra-low VOC aspartic acid polyurea primer has very excellent film drying property, leveling property, dispersion stability and lower viscosity, the coating film can meet the operation requirement of a coating production line without baking, and meanwhile, the construction is not influenced by the environmental temperature in the environment of 5-40 ℃.
Meanwhile, the aspartic acid polyurea primer guarantees the covering power, the corrosion resistance, the construction stability and the salt spray resistance of the primer, and simultaneously realizes ultra-low VOC; and after 30 days at 50 ℃, the viscosity, fineness and appearance of the primer system are not changed basically. Therefore, it is particularly suitable for coating in the field of construction machinery (light and heavy).
Detailed Description
In order to make the technical solution and advantages of the present invention more apparent, the following description will be made with reference to specific embodiments and examples. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
The reagents used in the present invention are commercially available, except for the specific ones described.
The invention provides an ultra-low VOC aspartic acid polyurea primer which comprises the following components in parts by weight:
it should be noted that: the ultra-low VOC aspartic acid polyurea primer provided by the invention simultaneously comprises three resins with different molecular weights in specific parts by weight. The three resins have synergistic effects of mutual supplementation:
(1) The low molecular weight aspartic acid polyurea resin can reduce the viscosity of the system, and simultaneously provides better chemical resistance for the coating film due to the characteristic of better compactness when the aspartic acid polyurea resin is cured; the aspartic acid polyurea resin has groups with ultra-fast reactivity, so that the coating is not influenced by the environmental temperature of 5-40 ℃, and can be rapidly cured into a film;
(2) The addition of the petroleum resin with large molecular weight can strengthen the flexibility of the coating film, greatly improve the shrinkage stress of the whole coating film and strengthen the adhesive force of the coating film to a substrate;
(3) The adhesion promoting resin LTW is soft auxiliary resin with special application, has wide compatibility, is used for improving the adhesion of an aspartic acid polyurea coating film to metals, inorganic matters and certain plastics, and provides long-acting and stable adhesion for the coating film on metal substrates such as carbon steel plates and the like.
Therefore, the compounding of three different molecular weights and different types of resins can lead the obtained primer coating to have obvious advantages in terms of drying property, leveling property, adhesion to a substrate and VOC reduction.
According to a preferred embodiment of the present invention, wherein the molecular weight of the aspartic acid polyurea resin is 500-600; the petroleum resin has a molecular weight of 1300-1800, specifically a C9 petroleum resin with high Tg; the adhesion promoting resin is an LTW resin.
In the present invention, the dispersant promotes the mutual compounding of different kinds of resins to form a coating film having good flexibility and at the same time, rigidity. One end of the primer has good affinity with polar pigment, can quickly wet the pigment surface and generate stronger adsorption effect, and meanwhile, the long-chain alkyl/aryl introduced by the other end is just like an anchor groove structure, has good compatibility with an aspartic acid polyurea resin molecular chain, further reduces the possibility of re-flocculation or aggregation of the primer system, the stability of the primer system is maintained, the aspartic acid polyurea primer system is not layered for a long time, the viscosity, fineness and appearance of the aspartic acid polyurea primer system can be maintained for a long time, the viscosity and the dispersity of the aspartic acid polyurea primer system are stable, and the covering power and the stability of the primer in the use process are ensured.
In a preferred embodiment of the present invention, the dispersant is selected from polyurethane-based high molecular block copolymers or polyacrylate-based high molecular block copolymers. More preferably, the dispersant is selected from BYK110 dispersant, DISPERBYK-163 dispersant provided by Pick corporation.
The pigment and filler is an antirust filler which can be an industrial coating commonly used in the field, and an organic pigment or an inorganic pigment. The addition of the antirust filler can improve the anticorrosion function of the primer and improve the salt spray resistance of the primer. In a specific implementation, the person skilled in the art can choose the type of pigment and filler according to the need, which is not limited by the present invention.
The organic solvent is a mixture of propylene glycol methyl ether acetate and ethyl acetate, and preferably the mass ratio of the propylene glycol methyl ether acetate to the ethyl acetate is 1:7. The choice of solvent plays a key role in the pot life of the paint after mixing.
The above technical scheme will be described below with reference to specific embodiments.
Example 1 preparation of ultra low VOC aspartic acid polyurea primer 1
The ultra-low VOC aspartic acid polyurea primer suitable for engineering machinery coating comprises the following raw materials in parts by weight:
25kg of 100% by mass of F520 aspartic acid polyurea resin;
3kg of petroleum resin with the mass percentage of 100%;
1kg LTW adhesion promoting resin;
dispersing agent: BYK110 is 3kg and DISPERBYK-163 is 1kg;
defoaming agent: BYK 066N is 1kg;
organic solvent: 1kg of propylene glycol methyl ether acetate, 7kg of ethyl acetate,
pigment and filler mixture: 58kg, wherein the mass percent of the material comprises: 17% of aluminum tripolyphosphate, 8% of zinc oxide, 17% of precipitated barium sulfate, 33% of mica powder, 8% of iron oxide yellow and 17% of titanium pigment.
The preparation process comprises the following steps:
s1: 25kg of 100% by mass F520 aspartic acid polyurea resin, 3kg of 100% by mass petroleum resin, 1kg of LTW adhesion promoting resin, 3kg of a dispersant BYK110, DISPERBYK-163 and BYK 066N 1kg of a defoaming agent, and 3kg of a mixed solvent (propylene glycol methyl ether acetate and ethyl acetate in a ratio of 1:7) are added into a reaction vessel together, and stirred at a rotation speed of 400-600rpm for 10-15 minutes;
s2: 58kg of the pigment and filler mixture is added under the stirring state, and the pigment and filler mixture is continuously stirred at 400-600rpm for 10-15 minutes after the pigment and filler mixture is added;
s3: and (3) adding 5kg of the residual mixed solvent (propylene glycol methyl ether acetate and ethyl acetate in a ratio of 1:7) along the wall of the reaction vessel under the stirring state, continuously stirring for 30 minutes until the mixture is uniform, and then starting grinding and dispersing on a designated sand mill until the fineness is less than 30 mu m to obtain the ultra-low VOC aspartic acid polyurea primer.
Examples 2-4 preparation of ultra low VOC aspartic acid polyurea primer 2-4
The raw material composition of the ultra-low VOC aspartic acid polyurea primer of examples 2-4 is shown in Table 1 below, and was prepared in the same manner as in example 1.
Comparative example 1
In comparative example 1 is a conventional solvent-borne polyurea primer, the raw material composition of which is also shown in table 1 below.
The comparative example 1 does not contain the petroleum resin having a large molecular weight and the adhesion promoting resin according to the present invention, and thus is merely a comparative example.
TABLE 1 raw material Components of ultra-Low VOC aspartic acid polyurea primer in examples 1-4
Performance testing
The ultra-low VOC aspartic acid polyurea primers obtained in examples 1-4 and the conventional coating of comparative example 1 were tested for parameters and the results are shown in Table 2.
Table 2 parameters of ultra low VOC aspartic acid polyurea primers in examples 1-4 and conventional solvent primers in comparative example 1
As can be seen from the data in Table 2, the fineness, solids content and viscosity of the aspartic acid polyurea primers described in examples 1-4 of the present invention can all meet the requirements.
Most importantly, the aspartic acid polyurea primers described in examples 1-4 have a lower VOC, which is significantly reduced by over 70g/L over the standard of 250g/L or less.
Whereas the VOC in comparative example 1 is beyond the standard.
Further, some process parameters during the construction of the ultra-low VOC aspartic acid polyurea primers of examples 1-4, as well as the conventional solvent primer of comparative example 1, were tested, as well as the properties of the resulting paint films, and the results are shown in Table 3.
Table 3 comparison of the Performance test indicators of the primers of examples 1 to 4 and comparative example 1
The results in Table 3 show that the ultra-low VOC aspartic acid polyurea primer film provided by the invention has physical and chemical properties which meet the requirements, and the construction VOC is less than 250g/L.
The conventional solvent borne primer of comparative example 1 had a construction VOC of 330g/L, much greater than standard 250g/L. Further, as is clear from comparative example 1, the adhesion of the aspartic acid resin coating film, which was not compounded by the resin, to the substrate was poor.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. The ultra-low VOC aspartic acid polyurea primer is characterized by comprising the following components in parts by weight:
2. the aspartic acid polyurea primer according to claim 1, wherein the molecular weight of the aspartic acid polyurea resin is 500-600.
3. The aspartic acid polyurea primer according to claim 1, wherein the petroleum resin has a molecular weight of 1300-1800; preferably, the petroleum resin is a high Tg C9 petroleum resin.
4. The aspartic acid polyurea primer according to claim 1, wherein the adhesion promoting resin is an LTW resin.
5. The aspartic acid polyurea primer according to claim 1, wherein the dispersant is selected from polyurethane-based high molecular block copolymers or polyacrylate-based high molecular block copolymers.
6. The aspartic acid polyurea primer according to claim 1, wherein the dispersant is a pigment filler derivative.
7. The aspartic acid polyurea primer according to claim 1, wherein the organic solvent is a mixture of propylene glycol methyl ether acetate and ethyl acetate, wherein the mass ratio of propylene glycol methyl ether acetate to ethyl acetate is 1:7.
8. a method of preparing the aspartic acid polyurea primer of any one of claims 1-7, comprising the steps of:
s1: mixing 25-35 parts of aspartic acid polyurea resin, 3-7 parts of petroleum resin, 1-4 parts of adhesion promoting resin, 3-10 parts of dispersing agent, 0.5-1.5 parts of defoaming auxiliary agent and 1-5 parts of organic solvent, and stirring for 10-15min at a rotation speed of 400-600 rpm;
s2: continuously adding 50-60 parts of pigment and filler mixture under stirring, and continuously stirring for 10-15min at a rotating speed of 400-600 rpm;
s3: and continuously adding 1-5 parts of organic solvent under the stirring state, stirring until the mixture is uniformly mixed, and then grinding and dispersing until the fineness is less than 30 mu m to obtain the ultra-low VOC aspartic acid polyurea primer.
9. A coating system comprising the ultra-low VOC aspartic acid polyurea primer according to any one of claims 1-7.
10. The use of the ultra-low VOC aspartic acid polyurea primer according to any one of claims 1-7, which is suitable for engineering machinery coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111293192.6A CN116063910A (en) | 2021-11-03 | 2021-11-03 | Aspartic acid polyurea primer and preparation method thereof |
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| CN202111293192.6A CN116063910A (en) | 2021-11-03 | 2021-11-03 | Aspartic acid polyurea primer and preparation method thereof |
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