CN109321053B - Blade coating type middle coating automobile paint based on thermoplastic acrylic resin and preparation method thereof - Google Patents
Blade coating type middle coating automobile paint based on thermoplastic acrylic resin and preparation method thereof Download PDFInfo
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- CN109321053B CN109321053B CN201811070519.1A CN201811070519A CN109321053B CN 109321053 B CN109321053 B CN 109321053B CN 201811070519 A CN201811070519 A CN 201811070519A CN 109321053 B CN109321053 B CN 109321053B
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- acrylic resin
- thermoplastic acrylic
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Classifications
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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
-
- 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
-
- 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
- C08K3/18—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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
The invention discloses a blade coating type middle coating automobile paint based on thermoplastic acrylic resin, which is prepared from the following components in parts by weight: 38-44 parts of thermoplastic acrylic resin; 20-25 parts of powder; wetting dispersant BYK-W9660.5-1 part; 2-8 parts of pigment; 0.1-0.3 part of pigment dispersant; xylene is added to 100 parts by weight of the total weight of the system; the thermoplastic acrylic resin is NeoCryl B-735 solid thermoplastic acrylic resin. The coating of the present invention can exhibit the following excellent properties: 1. the coating and scraping hand feeling is good, the content of 2 and solid is high, the viscosity is not high, and the VOC emission is reduced; 3. the ductility can be kept consistent with that of the finishing coat; 4. the adhesive force with finish paint is good; 5. the viscosity is low at high temperatures and high at low temperatures.
Description
Technical Field
The invention relates to the field of automobile middle coating, in particular to a blade coating type middle coating automobile coating based on thermoplastic acrylic resin and a preparation method thereof.
Background
The intermediate coating is a coating applied between a primer and a finish, and the development of the water-based intermediate coating is long with the development of science and technology, for example, CN201510580874.3 discloses a water-based intermediate coating, which comprises 50-60% of epoxy-organic silicon resin modified polyurethane-acrylic acid aqueous dispersion, 17-23% of antirust pigment, 12-17% of filler, 0.1-0.3% of wetting agent, 0.4-3% of propylene glycol-methyl ether, 0.1-0.4% of defoaming agent, 0.1-0.3% of dimethylethanolamine and the balance of water according to weight percentage. The water-based primer surfacer adopts the water dispersion as a base material, and a coating film has the characteristics of high mechanical strength and excellent corrosion resistance of epoxy-organic silicon resin, has the characteristics of good weather resistance and high decoration property of polyurethane acrylic resin, is convenient to use and wide in application range, and can effectively slow down the electrochemistry of a metal base material.
Although the environmental protection of the water-based primer surfacer is significantly better than that of the oil-based primer surfacer, the oil-based primer surfacer has significant advantages in application properties including, but not limited to, drying speed, film toughness, film hardness, and the like, compared with the water-based primer surfacer.
In the field of automobile paint surface repair, the problem brought by the spraying type intermediate coat paint used for paint surface repair is that the workload is large when the position to be repaired needs to be subjected to large-scale finish paint removal and polishing.
Therefore, it is an effective way to solve the problem of using a scratch-type intermediate coat paint, which, if a good effect is to be achieved, faces and is urgently needed to solve the problem that: 1. the paint has better viscosity, so that the paint has good hand scraping feeling, and the paint is beneficial to a worker to quickly sense the concave part in the primer for finishing; 2. it is desirable to maintain a high degree of ductility with the surrounding finish and the area to be painted to avoid cracking of the finish due to temperature changes.
Disclosure of Invention
The invention aims to provide a blade coating type middle coating automobile coating based on thermoplastic acrylic resin and a preparation method thereof, wherein the coating can show the following excellent properties: 1. the coating and scraping hand feeling is good, the content of 2 and solid is high, the viscosity is not high, and the VOC emission is reduced; 3. the ductility can be kept consistent with that of the finishing coat; 4. the adhesive force with finish paint is good; 5. the viscosity is low at high temperatures and high at low temperatures.
The specific scheme of the invention is as follows: a blade coating type middle coating automobile paint based on thermoplastic acrylic resin is prepared from the following components in parts by weight:
38-44 parts of thermoplastic acrylic resin;
20-25 parts of powder;
wetting dispersant BYK-W9660.5-1 part;
2-8 parts of pigment;
0.1-0.3 part of pigment dispersant;
xylene is added to 100 parts by weight of the total weight of the system;
the thermoplastic acrylic resin is NeoCryl B-735 solid thermoplastic acrylic resin.
In the above-mentioned blade coating type intercoat automobile paint based on thermoplastic acrylic resin, the powder material comprises calcium carbonate and quartz powder, and the weight ratio of the calcium carbonate to the quartz powder is 1: 4.
In the above-mentioned blade coating type intermediate coating automobile paint based on the thermoplastic acrylic resin, the pigment dispersant is BYK-163.
In the above-mentioned method for preparing a blade coating type intermediate coating automobile paint based on thermoplastic acrylic resin, the method comprises the following steps:
step 1: mixing thermoplastic acrylic resin with xylene, and adding a wetting dispersant after uniform mixing;
step 2: adding the mixture obtained in the step 1 into powder under the condition of high-speed stirring; gradually adding the powder to ensure that the powder can be uniformly dispersed into the system;
and step 3: and (3) adding the pigment dispersing agent and the pigment into the reaction system in the step (2) for high-speed stirring, uniformly stirring, then carrying out low-speed stirring, and discharging.
In the above method for preparing a blade coating type intermediate coating automobile paint based on thermoplastic acrylic resin, in step 1, the mixing time is 10-20 minutes;
in the step 2, the stirring time is 30-40 minutes;
in step 3, the stirring time is 5-10 minutes.
The technical advantages of the invention are as follows:
1. by adopting an oily system containing thermoplastic acrylic resin, the system can be kept to keep low viscosity in the preparation process and keep high viscosity after subpackaging, so that the production, filling and knife coating handfeel are facilitated;
2. an effective way for improving the scraping hand feeling is to add powder, but in the actual application process, the problem is that the powder is very difficult to disperse under the condition of high-speed stirring, even if the powder is dispersed at ultrahigh speed, micro-points still exist after the finish is sprayed after the powder is scraped, the problems can be solved by optimizing the wetting dispersant, and the wetting dispersant BYK-W966 is adopted, so that the dispersion difficulty is low, the smoothness of the finish can be kept excellent after the finish is sprayed, and the micro-points are avoided;
3. on the other hand, the presence of the wetting dispersant BYK-W966 also improves the adhesion of the powder to the basecoat and topcoat.
4. In the solid content range of the invention, the NeoCryl B-735 solid thermoplastic acrylic resin can maintain the synchronous ductility of the finish paint, and in general, the fine adjustment of the ratio of the thermoplastic acrylic resin to the powder can be adapted to the ductility requirement of most finish paints. The cracking condition of the finish paint with the repaired thickness is reduced.
Detailed Description
The invention will now be further described with reference to the following examples, which are not to be construed as limiting the invention in any way, and any limited number of modifications which can be made within the scope of the claims of the invention are still within the scope of the claims of the invention.
Example 1
A preparation method of a blade coating type middle coating automobile paint based on thermoplastic acrylic resin comprises the following steps:
step 1: 39kg of thermoplastic acrylic resin NeoCryl B-735 is mixed with 37kg of xylene for 15min, and 800g of wetting dispersant BYK-W966 is added after uniform mixing; the dispersion temperature is 60 ℃ and should be controlled at this temperature throughout the reaction;
step 2: adding 4kg of calcium carbonate and 16kg of quartz powder into the mixture obtained in the step 1 under the condition of high-speed stirring; the powder is gradually added to ensure that the powder can be uniformly dispersed into the system, the dispersion time is 35min,
and step 3: and (3) adding 200g of pigment dispersant BYK-163 and 3kg of titanium dioxide into the reaction system in the step (2), stirring at a high speed for 6min, stirring uniformly, stirring at a low speed, and discharging.
Example 2
A preparation method of a blade coating type middle coating automobile paint based on thermoplastic acrylic resin comprises the following steps:
step 1: 44kg of thermoplastic acrylic resin NeoCryl B-735 and 24.7kg of dimethylbenzene are mixed for 15min, and 1kg of wetting dispersant BYK-W966 is added after uniform mixing; the dispersion temperature was 65 ℃ which should be controlled throughout the reaction;
step 2: adding 5kg of quartz powder and 20kg of calcium carbonate into the mixture obtained in the step 1 under the condition of high-speed stirring; the powder is gradually added to ensure that the powder can be uniformly dispersed into the system, the dispersion time is 40min,
and step 3: and (3) adding 300g of pigment dispersant BYK-163 and 5kg of titanium dioxide into the reaction system in the step (2), stirring at a high speed for 6min, stirring uniformly, stirring at a low speed, and discharging.
Example 3
A preparation method of a blade coating type middle coating automobile paint based on thermoplastic acrylic resin comprises the following steps:
step 1: mixing 38kg of thermoplastic acrylic resin NeoCryl B-735 with 36.3kg of xylene for 15min, and adding 0.6kg of wetting dispersant BYK-W966 after uniform mixing; the dispersion temperature is 60 ℃ and should be controlled at this temperature throughout the reaction;
step 2: adding 10kg of calcium carbonate and 10kg of quartz powder into the mixture obtained in the step 1 under the condition of high-speed stirring; the powder is gradually added to ensure that the powder can be uniformly dispersed into the system, the dispersion time is 30min,
and step 3: and (3) adding 100g of pigment dispersant BYK-163 and 2kg of titanium dioxide into the reaction system obtained in the step (2), stirring at a high speed for 10min, stirring uniformly, stirring at a low speed, and discharging.
Example 4
A preparation method of a blade coating type middle coating automobile paint based on thermoplastic acrylic resin comprises the following steps:
step 1: 39kg of thermoplastic acrylic resin NeoCryl B-735 is mixed with 37kg of xylene for 15min, and 800g of wetting dispersant BYK-W966 is added after uniform mixing; the dispersion temperature is 60 ℃ and should be controlled at this temperature throughout the reaction;
step 2: adding 5kg of calcium carbonate and 20kg of quartz powder into the mixture obtained in the step 1 under the condition of high-speed stirring; the powder is gradually added to ensure that the powder can be uniformly dispersed into the system, the dispersion time is 35min,
and step 3: and (3) adding 200g of pigment dispersant BYK-163 and 3kg of titanium dioxide into the reaction system in the step (2), stirring at a high speed for 6min, stirring uniformly, stirring at a low speed, and discharging.
Example 5
A preparation method of a blade coating type middle coating automobile paint based on thermoplastic acrylic resin comprises the following steps:
step 1: mixing 38kg of thermoplastic acrylic resin NeoCryl B-735 with 36.3kg of xylene for 15min, and adding 0.6kg of wetting dispersant BYK-W966 after uniform mixing; the dispersion temperature was 65 ℃ which should be controlled throughout the reaction;
step 2: adding 13kg of calcium carbonate and 10kg of quartz powder into the mixture obtained in the step 1 under the condition of high-speed stirring; gradually adding the powder to uniformly disperse the powder into the system for 30 min;
and step 3: and (3) adding 100g of pigment dispersant BYK-163 and 2kg of titanium dioxide into the reaction system obtained in the step (2), stirring at a high speed for 10min, stirring uniformly, stirring at a low speed, and discharging.
Comparative example 1
The same as example 1 except that the acrylic resin was PRS-1015; wetting dispersant BYK-182
Application testing
A first part: test method
And (3) a coating and scraping process, namely repairing and filling metal plate ash, carrying out atom ash molding and polishing, and then completely covering for 3 times, wherein the construction thickness is controlled within 1.0 mm. And (3) carrying out water grinding by using (800# -1000 # water grinding abrasive paper) after drying for 10-15 minutes, or carrying out grinding by using (800# -1000 # water grinding abrasive paper and 320# -400 # dry grinding abrasive paper) after drying for 15-30 minutes, cleaning the surface of the substrate after grinding, and directly spraying finish paint without spraying primer.
And (3) sanding property test: according to a mechanical polishing determination method using a DM-1 type polishing determinator in GB1770- (79)88 primer and putty film polishing test method, a test plate is arranged in the center of an instrument sucker, a grinding head is provided with water sand paper with a specified model, after polishing for a certain number of times, the surface phenomenon of the sample plate is observed, and the results are evaluated by using two sample plates with similar phenomena.
And (3) testing the adhesive force: the resistance of the coating to detachment from the substrate was assessed by cutting and perforating the coating in a grid pattern with a hundred grid knife according to GB/T1720-1979(1989) adhesion test, the pattern obtained by the grid cutting being classified in six stages
ISO class 0
ASTM grade 5B
The edges of the cuts were completely smooth without any flaking of the grid edges.
ISO class 1
ASTM grade 4B
And small pieces are peeled off at the intersection of the cuts, and the actual breakage in the grid cutting area is not more than 5%.
ISO class 2
ASTM grade 3B
The edges and/or intersections of the cuts are peeled off to an area greater than 5% but less than 15%.
ISO class 3
ASTM grade 2B
Partial or entire panels along the edges of the cuts and/or partial panels are peeled off in one piece. The area peeled off was more than 15% but less than 35%.
ISO class 4
ASTM grade 1B
The edge of the cut is largely peeled off and/or some squares are partially or completely peeled off, and the area of the cut is more than 35% of the area of the grid area but not more than 65%.
ISO class 5
ASTM rating 0B exceeds the previous rating.
Flexibility test: according to a paint film cylinder bending tester used in GB/T1731-1993 paint film flexibility determination method, a prepared sample plate is inserted into a diameter cylinder to be tested, a cover plate is pressed down, the surface effect of a bending position is observed, cracking and falling are generated, and the result of complete non-falling and cracking is obtained, so that the flexibility of the paint film cylinder is judged.
Shrinkage and cracking resistance test: placing the aluminum alloy sheet subjected to the blade coating process in a thermostat, adjusting the temperature of the thermostat, and performing a test for 12 hours and a cycle for 24 hours; adjusting the temperature once every 12 hours, and circulating the temperature to-5 ℃ and 80 ℃; the cycle was continued for 10 days to see if cracking occurred.
The results of the second part of the test are shown in Table 1
TABLE 1 test results of examples 1-5 and comparative example 1
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (3)
1. A blade coating type middle coating automobile paint based on thermoplastic acrylic resin is characterized by comprising the following components in parts by weight:
38-44 parts of thermoplastic acrylic resin;
20-25 parts of powder;
wetting dispersant BYK-W9660.5-1 part;
2-8 parts of pigment;
0.1-0.3 part of pigment dispersant;
xylene is added to 100 parts by weight of the total weight of the system;
the thermoplastic acrylic resin is NeoCryl B-735 solid thermoplastic acrylic resin, the powder comprises calcium carbonate and quartz powder, and the weight ratio of the calcium carbonate to the quartz powder is 1: 4; the pigment dispersant is BYK-163;
the preparation method comprises the following steps:
step 1: mixing thermoplastic acrylic resin with xylene, and adding a wetting dispersant after uniform mixing;
step 2: adding the mixture obtained in the step 1 into powder under the condition of high-speed stirring; gradually adding the powder to ensure that the powder can be uniformly dispersed into the system;
and step 3: and (3) adding the pigment dispersing agent and the pigment into the reaction system in the step (2) for high-speed stirring, uniformly stirring, then carrying out low-speed stirring, and discharging.
2. A method for preparing a thermoplastic acrylic resin-based blade coating type intercoat automotive coating according to claim 1, comprising the steps of:
step 1: mixing thermoplastic acrylic resin with xylene, and adding a wetting dispersant after uniform mixing;
step 2: adding the mixture obtained in the step 1 into powder under the condition of high-speed stirring; gradually adding the powder to ensure that the powder can be uniformly dispersed into the system;
and step 3: and (3) adding the pigment dispersing agent and the pigment into the reaction system in the step (2) for high-speed stirring, uniformly stirring, then carrying out low-speed stirring, and discharging.
3. The method for preparing a thermoplastic acrylic resin-based blade coating type intercoat automotive coating according to claim 2, wherein in the step 1, the mixing time is 10 to 20 minutes;
in the step 2, the stirring time is 30-40 minutes;
in step 3, the stirring time is 5-10 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070519.1A CN109321053B (en) | 2018-09-14 | 2018-09-14 | Blade coating type middle coating automobile paint based on thermoplastic acrylic resin and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811070519.1A CN109321053B (en) | 2018-09-14 | 2018-09-14 | Blade coating type middle coating automobile paint based on thermoplastic acrylic resin and preparation method thereof |
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| CN109321053A CN109321053A (en) | 2019-02-12 |
| CN109321053B true CN109321053B (en) | 2021-03-23 |
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Citations (4)
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| WO2010027674A1 (en) * | 2008-09-02 | 2010-03-11 | Ppg Industries Ohio, Inc. | Waterborne polyurethane dispersion comprising biomass derived polyol and coatings comprising same |
| WO2014047018A2 (en) * | 2012-09-19 | 2014-03-27 | 3M Innovative Properties Company | Coating compositions and articles made therefrom |
| CN104968715A (en) * | 2012-10-03 | 2015-10-07 | 3M创新有限公司 | Coating compositions and articles made therefrom |
| CN107641379A (en) * | 2017-10-23 | 2018-01-30 | 河北晨阳工贸集团有限公司 | A kind of special sealing wax of bumper and its preparation, application method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4232090A (en) * | 1979-04-30 | 1980-11-04 | Ppg Industries, Inc. | Sealerless primers |
| CN102796430A (en) * | 2012-09-07 | 2012-11-28 | 天津市瑞恩涂料制造有限公司 | Primer paint |
| CN103773159A (en) * | 2012-10-19 | 2014-05-07 | 南京恒安树脂化学有限公司 | Thermoplastic acrylic resin coating |
| CN105153912A (en) * | 2015-09-29 | 2015-12-16 | 东来涂料技术（上海）有限公司 | Quick dry intermediate paint for automotive repairing and preparation method of quick dry intermediate paint |
| US10035924B2 (en) * | 2015-12-04 | 2018-07-31 | Dur-A-Flex, Inc. | Elimination of application streaks of coatings using short fibers |
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2018
- 2018-09-14 CN CN201811070519.1A patent/CN109321053B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010027674A1 (en) * | 2008-09-02 | 2010-03-11 | Ppg Industries Ohio, Inc. | Waterborne polyurethane dispersion comprising biomass derived polyol and coatings comprising same |
| WO2014047018A2 (en) * | 2012-09-19 | 2014-03-27 | 3M Innovative Properties Company | Coating compositions and articles made therefrom |
| CN104968715A (en) * | 2012-10-03 | 2015-10-07 | 3M创新有限公司 | Coating compositions and articles made therefrom |
| CN107641379A (en) * | 2017-10-23 | 2018-01-30 | 河北晨阳工贸集团有限公司 | A kind of special sealing wax of bumper and its preparation, application method |
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Denomination of invention: A scratch type mid coat automotive coating based on thermoplastic acrylic resin and its preparation method Effective date of registration: 20230925 Granted publication date: 20210323 Pledgee: Bank of China Limited Qingyuan Branch Pledgor: QINGYUAN YONGCHANG PAINT CO.,LTD. Registration number: Y2023980058445 |
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