CN113321999A - Moisture-proof quick-drying protective coating and preparation method thereof - Google Patents
Moisture-proof quick-drying protective coating and preparation method thereof Download PDFInfo
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- CN113321999A CN113321999A CN202110718313.0A CN202110718313A CN113321999A CN 113321999 A CN113321999 A CN 113321999A CN 202110718313 A CN202110718313 A CN 202110718313A CN 113321999 A CN113321999 A CN 113321999A
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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
- C09D175/04—Polyurethanes
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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
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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
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C08K3/02—Elements
- C08K2003/023—Silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a moisture-proof quick-drying protective coating and a preparation method thereof, wherein the protective coating comprises the following components in parts by weight: 20-30 parts of polyurethane, 10-20 parts of hydroxyl acrylic resin, 3-10 parts of perchloro-ethylene resin, 4-8 parts of silicon powder, 5-12 parts of aluminum silicate, 5-15 parts of calcium lignosulfonate and 35-50 parts of solvent. The preparation method comprises the following steps: dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and uniformly mixing the other part of the solvent with polyurethane and hydroxy acrylic resin to obtain a second slurry; further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry; adding perchloro-ethylene resin into the slurry III, and uniformly mixing to obtain the high-performance polyvinyl chloride resin. Compared with the existing polyurethane coating, the protective coating and the preparation method thereof have more excellent wear resistance, chemical resistance, oil resistance, adhesive force, stability and quick-drying performance, and are safe, non-toxic, green and environment-friendly.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a moisture-proof quick-drying protective coating and a preparation method thereof.
Background
The protective coating has wide application in the fields of engineering machinery, building bridges, ships, chemical equipment and the like, and the protective coating is mainly used for moisture insulation, corrosion prevention and abrasion prevention, so that the product has good decoration, weather resistance, corrosion prevention and corrosion resistance. Among the existing various protective coatings, the polyurethane coating has the performances of good wear resistance, strong adhesion, high decoration, no toxicity and the like, and attracts attention, but the polyurethane coating still has the following defects in practical application: firstly, the chemical resistance and the oil resistance are not outstanding, the coating can only act in a short time, and the rusting speed of the surface of the coating is higher along with the prolonging of the service time; secondly, in order to improve the film forming performance of the existing polyurethane coating, water is often added as a solvent and a dispersing agent, so that the drying speed of the coating is slowed, the drying time is prolonged, and most coatings do not have a quick drying function. Therefore, there is a need to further develop new polyurethane coatings that improve defects while retaining their excellent properties.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a moisture-proof quick-drying protective coating and a preparation method thereof. The technical scheme of the invention is as follows:
in a first aspect, the invention provides a moisture-proof quick-drying protective coating, which comprises the following components in parts by weight: 20-30 parts of polyurethane, 10-20 parts of hydroxyl acrylic resin, 3-10 parts of perchloro-ethylene resin, 4-8 parts of silicon powder, 5-12 parts of aluminum silicate, 5-15 parts of calcium lignosulfonate and 35-50 parts of solvent.
Optionally, the solvent comprises at least one of mineral spirit No. 200, dimethyl carbonate, heavy aromatics, propylene glycol methyl ether, butyl acetate.
Preferably, the solvent is propylene glycol methyl ether and butyl acetate according to a volume ratio of (1-2): 1, compounding.
Further, the protective coating also comprises 0.5-2 parts of modified graphene.
Further, the protective coating also comprises 3-8 parts of an auxiliary agent.
Preferably, the auxiliary agent is selected from at least one of polydimethylsiloxane, vinyl polydimethylsiloxane and hydroxypropyl-terminated polydimethylsiloxane.
Further, the protective coating also comprises 3-10 parts of a curing agent.
Preferably, the curing agent is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester.
Optionally, the protective coating further comprises 1-3 parts of an organosilicon waterproofing agent.
In a second aspect, the invention provides a preparation method of the moisture-proof quick-drying protective coating, which comprises the following steps:
(3) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and uniformly mixing the other part of the solvent with polyurethane and hydroxy acrylic resin to obtain a second slurry;
(4) further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry;
(5) adding perchloro-ethylene resin into the slurry III, and uniformly mixing to obtain the high-performance polyvinyl chloride resin.
Further, the preparation method further comprises the step of further adding the modified graphene into the first slurry and uniformly mixing.
Further, the preparation method comprises the step of adding the perchloroethylene resin into the slurry III, and then further adding the auxiliary agent and the curing agent to be uniformly mixed.
Optionally, the preparation method further comprises the step of adding a perchloroethylene resin into the slurry III, and then further adding an organosilicon waterproofing agent to be uniformly mixed.
The invention has the beneficial effects that:
1. according to the invention, the polyurethane, the hydroxyl acrylic resin and the perchloro-ethylene resin are compounded, so that the wear resistance, chemical resistance and oil resistance of the existing polyurethane coating can be improved.
2. According to the invention, on the basis of compounding multiple resins to form a film, calcium lignosulfonate is further added, so that the waterproof and moisture-proof properties of the coating can be enhanced.
3. The invention enhances the stability, adhesive force, quick drying and other properties of the coating by blending other components, such as silicon powder, aluminum silicate and selection of a solvent.
4. Compared with the existing polyurethane coating, the protective coating and the preparation method thereof have more excellent wear resistance, chemical resistance, oil resistance, adhesive force, stability and quick-drying performance, and are safe, non-toxic, green and environment-friendly.
Detailed Description
In the description of the present invention, it is to be noted that those whose specific conditions are not specified in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturers. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Example 1
The embodiment provides a moisture-proof quick-drying protective coating which comprises the following components in parts by weight: 23 parts of polyurethane, 16 parts of hydroxy acrylic resin, 5 parts of perchloroethylene resin, 4 parts of silica powder, 12 parts of aluminum silicate, 10 parts of calcium lignosulfonate and 40 parts of No. 200 solvent oil. The preparation method of the protective coating comprises the following steps:
(1) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and uniformly mixing the other part of the solvent with polyurethane and hydroxy acrylic resin to obtain a second slurry;
(2) further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry;
(3) adding perchloro-ethylene resin into the slurry III, and uniformly mixing to obtain the high-performance polyvinyl chloride resin.
Example 2 (according to the preferred solvent)
The embodiment provides a moisture-proof quick-drying protective coating which comprises the following components in parts by weight: 30 parts of polyurethane, 12 parts of hydroxy acrylic resin, 10 parts of perchloroethylene resin, 6 parts of silicon powder, 5 parts of aluminum silicate, 5 parts of calcium lignosulfonate and 50 parts of solvent, wherein the solvent is propylene glycol methyl ether and butyl acetate according to a volume ratio of (1-2): 1, compounding. The preparation of the protective coating was the same as in example 1.
Example 3 (preferred solvent + modified graphene)
The embodiment provides a moisture-proof quick-drying protective coating which comprises the following components in parts by weight: 20 parts of polyurethane, 20 parts of hydroxy acrylic resin, 3 parts of perchloroethylene resin, 8 parts of silicon powder, 7 parts of aluminum silicate, 15 parts of calcium lignosulfonate, 0.5 part of modified graphene and 35 parts of solvent, wherein the solvent is propylene glycol monomethyl ether and butyl acetate according to the volume ratio of (1-2): 1, compounding. The preparation method of the protective coating comprises the following steps:
(1) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and further adding modified graphene into the first slurry to be uniformly mixed; the other part is uniformly mixed with polyurethane and hydroxyl acrylic resin to obtain slurry II;
(2) further uniformly mixing the first slurry and the second slurry which are mixed with the modified graphene and calcium lignosulfonate to obtain a third slurry;
(3) adding perchloro-ethylene resin into the slurry III, and uniformly mixing to obtain the high-performance polyvinyl chloride resin.
Example 4 (auxiliary + curing agent)
The embodiment provides a moisture-proof quick-drying protective coating which comprises the following components in parts by weight: 25 parts of polyurethane, 10 parts of hydroxy acrylic resin, 6 parts of perchloroethylene resin, 5 parts of silicon powder, 8 parts of aluminum silicate, 7 parts of calcium lignosulfonate, 5 parts of polydimethylsiloxane, 5 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester and 45 parts of dimethyl carbonate. The preparation method of the protective coating comprises the following steps:
(1) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and uniformly mixing the other part of the solvent with polyurethane and hydroxy acrylic resin to obtain a second slurry;
(2) further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry;
(3) adding perchloroethylene resin into the slurry III, uniformly mixing, further adding polydimethylsiloxane and 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester, and uniformly mixing to obtain the catalyst.
Example 5 (modified graphene + adjuvant + curing agent)
The embodiment provides a moisture-proof quick-drying protective coating which comprises the following components in parts by weight: 20 parts of polyurethane, 18 parts of hydroxy acrylic resin, 4 parts of perchloroethylene resin, 4 parts of silicon powder, 11 parts of aluminum silicate, 5 parts of calcium lignosulfonate, 2 parts of modified graphene, 3 parts of hydroxypropyl-terminated polydimethylsiloxane, 5 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester and 50 parts of heavy aromatic hydrocarbon. The preparation method of the protective coating comprises the following steps:
(1) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and further adding modified graphene into the first slurry to be uniformly mixed; the other part is uniformly mixed with polyurethane and hydroxyl acrylic resin to obtain slurry II;
(2) further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry;
(3) adding perchloroethylene resin into the slurry III, uniformly mixing, further adding the hydroxypropyl-terminated polydimethylsiloxane and the 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester, and uniformly mixing to obtain the product.
Example 6 (all-purpose)
The embodiment provides a moisture-proof quick-drying protective coating which comprises the following components in parts by weight: 22 parts of polyurethane, 13 parts of hydroxy acrylic resin, 9 parts of perchloroethylene resin, 8 parts of silicon powder, 6 parts of aluminum silicate, 10 parts of calcium lignosulfonate, 1 part of modified graphene, 5 parts of vinyl polydimethylsiloxane, 5 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester, 2 parts of an organosilicon waterproofing agent and 35 parts of propylene glycol methyl ether. The preparation method of the protective coating comprises the following steps:
(1) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and further adding modified graphene into the first slurry to be uniformly mixed; the other part is uniformly mixed with polyurethane and hydroxyl acrylic resin to obtain slurry II;
(2) further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry;
(3) adding perchloroethylene resin into the slurry III, uniformly mixing, further adding vinyl polydimethylsiloxane, 2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester and an organic silicon waterproof agent, and uniformly mixing to obtain the paint.
Example 6
Performance testing
(1) The moisture-proof quick-drying protective coatings of examples 1-6 and some polyurethane coatings sold in the market form cured coatings on aluminum plate samples, the coating thickness is 150-160 μm, the appearance is visually observed, the adhesion is detected by an X-ray method, and the detection results are shown in Table 1. And (3) adhesive force grade: 5A, no shedding; 4A, a falling trace is formed along the cutter mark; 3A, two sides of the knife mark are provided with notches which fall off by 1.6 mm; 2A, two sides of the knife mark are provided with notches which fall off by 3.2 mm; 1A, large pieces fall off in an X area under the adhesive tape; 0A, the peeled area exceeds the X region.
TABLE 1 appearance and adhesion test results for coatings formed from the protective coatings of examples 1-6 and commercial polyurethane coatings
The data in table 1 show that the protective coatings of this example all have good appearance and adhesion, wherein the protective coatings of examples 3, 5 and 6 have better adhesion than the existing polyurethane coatings, possibly in connection with the addition of modified graphene.
(2) The moisture-proof quick-drying protective coatings of examples 1-6 and some polyurethane coatings sold in the market are used for forming cured coatings on aluminum plate samples, the thickness of each coating is 100-120 mu m, the abrasion resistance of the coatings is measured by a Taber abrasion tester according to ISO7784.2-97, the surfaces of the coatings are abraded by a hard rubber friction wheel embedded with carborundum abrasives, the rotating speed of a rotating disc is 60r/min, and the test load is 500 g. The 180-turn coating wear was measured. The specific results are shown in table 2:
TABLE 2 abrasion resistance test results of coatings formed from the protective coatings of examples 1-6 and commercially available polyurethane coatings
| Test sample | Weight loss [ mg] |
| Example 1 coating corresponding coating | 68.6 |
| Example 2 coating of the corresponding coating | 66.3 |
| Example 3 coating of the corresponding coating | 49.2 |
| Example 4 coating corresponding coating | 65.1 |
| Example 5 coating corresponding coating | 43.2 |
| Example 6 coating of the corresponding coating | 39.5 |
| Corresponding coatings of commercially available polyurethane coatings | 108.9 |
The data in Table 2 show that the protective coating of this example has good abrasion resistance, and the protective coatings of examples 3, 5 and 6 have much better abrasion resistance than the existing polyurethane coatings.
(3) The moisture-proof quick-drying protective coatings of examples 1 to 6 and some polyurethane coatings on the market were applied to an aluminum plate sample to form a cured coating with a thickness of 100 to 120 μm, and water resistance, acid resistance, alkali resistance, petroleum product resistance, salt spray resistance and artificially accelerated aging tests were performed on the paint film according to the test methods given in table 3, and the test results are shown in table 4.
TABLE 3 test Performance indices
Table 4 results of performance testing
The data in table 4 show that there is no difference in water resistance, acid resistance, alkali resistance and salt spray resistance within 7 days between the protective coating of the invention and the commercial polyurethane, but after 28 days of extension the acid resistance, alkali resistance of the commercial polyurethane coating are significantly less than those of the protective coating of the invention and the petroleum product resistance of the protective coating of the invention is always better than that of the commercial polyurethane.
(4) The moisture-proof quick-drying protective coatings of examples 1 to 6 were subjected to drying property test
The moisture-proof quick-drying protective coatings of examples 1-6 were applied to aluminum plate samples to form cured coatings having a thickness of 200 + -20 μm, and the aluminum plate samples were dried at 150 deg.C and tested for weight at 2min intervals, with the specific results shown in Table 5.
Table 5 quick drying performance test results for moisture resistant quick drying protective coatings of examples 1-6
Note: weight loss rate (sample mass at last time point-sample mass at current time point)/sample mass at last time point ×%
As can be seen from the data in Table 5, the weight loss of the protective coating of the present invention at 12min is already 0, the required drying time can be controlled within 12min, and the drying speed is fast.
Compared with the existing polyurethane coating, the protective coating and the preparation method thereof have more excellent wear resistance, chemical resistance, oil resistance, adhesive force, stability and quick-drying performance, and are safe, non-toxic, green and environment-friendly.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The moisture-proof quick-drying protective coating is characterized in that: the composition comprises the following components in parts by weight: 20-30 parts of polyurethane, 10-20 parts of hydroxyl acrylic resin, 3-10 parts of perchloro-ethylene resin, 4-8 parts of silicon powder, 5-12 parts of aluminum silicate, 5-15 parts of calcium lignosulfonate and 35-50 parts of solvent.
2. The moisture-proof quick-drying protective coating according to claim 1, characterized in that: the solvent comprises at least one of No. 200 solvent oil, dimethyl carbonate, heavy aromatics, propylene glycol methyl ether and butyl acetate.
3. A moisture-proof fast-drying protective coating according to claim 1 or 2, characterized in that: the solvent is propylene glycol methyl ether and butyl acetate according to the volume ratio of (1-2): 1, compounding.
4. The moisture-proof quick-drying protective coating according to claim 1, characterized in that: the protective coating further comprises 0.5-2 parts of modified graphene.
5. The moisture-proof quick-drying protective coating according to claim 1, characterized in that: the protective coating further comprises 3-8 parts of an auxiliary agent.
6. The moisture-proof quick-drying protective coating according to claim 5, wherein: the auxiliary agent is at least one selected from polydimethylsiloxane, vinyl polydimethylsiloxane and hydroxypropyl-terminated polydimethylsiloxane.
7. The moisture-proof quick-drying protective coating according to claim 1, characterized in that: the protective coating further comprises 3-10 parts of a curing agent.
8. The moisture-proof quick-drying protective coating according to claim 7, wherein: the curing agent is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyl ester.
9. The moisture-proof quick-drying protective coating according to claim 1, characterized in that: the protective coating also comprises 1-3 parts of an organic silicon waterproof agent.
10. The preparation method of the moisture-proof quick-drying protective coating of any one of claims 1 to 9, characterized in that: the method comprises the following steps:
(1) dividing the solvent into two parts, uniformly mixing one part of the solvent with silicon powder and aluminum silicate to obtain a first slurry, and uniformly mixing the other part of the solvent with polyurethane and hydroxy acrylic resin to obtain a second slurry;
(2) further uniformly mixing the first slurry, the second slurry and calcium lignosulfonate to obtain a third slurry;
(3) adding perchloro-ethylene resin into the slurry III, and uniformly mixing to obtain the high-performance polyvinyl chloride resin.
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| CN202110718313.0A CN113321999A (en) | 2021-06-28 | 2021-06-28 | Moisture-proof quick-drying protective coating and preparation method thereof |
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| CN202110718313.0A CN113321999A (en) | 2021-06-28 | 2021-06-28 | Moisture-proof quick-drying protective coating and preparation method thereof |
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