CN107057536B - A kind of body of a motor car special coating and its preparation method and application - Google Patents
A kind of body of a motor car special coating and its preparation method and application Download PDFInfo
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- CN107057536B CN107057536B CN201710320690.2A CN201710320690A CN107057536B CN 107057536 B CN107057536 B CN 107057536B CN 201710320690 A CN201710320690 A CN 201710320690A CN 107057536 B CN107057536 B CN 107057536B
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; 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
- 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
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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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- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
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- 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
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- 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
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Abstract
The present invention provides a kind of body of a motor car special coatings and its preparation method and application, including priming paint, finishing coat and varnish, three is matched, and gained body of a motor car special coating has good weatherability, three painting matchings are excellent, coating can be up to crosslinking be fully cured, and solvent noresidue is not after-tacked, and good dispersion when spraying, good leveling property, thixotropy is moderate, coating uniform, without tangerine peel, without pinprick bubble, free from admixture point exists.Lacquer painting levelling is plentiful, glossiness is good, clarity is high.
Description
Technical field
The invention belongs to coating preparation fields, and in particular to a kind of body of a motor car special coating and preparation method thereof and answer
With.
Background technique
With the rapid development of modern economy, automobile oneself be universal modern transportation tool.As automobile coat
Car paint, chromaticity, the superiority and inferiority of paint film appearance, clarity, gloss etc. are all visual evaluation of the people to car mass,
It will directly determine the class of automobile, influence the competitiveness of automobile market.In addition automobile lacquer coat is also that raising automobile product is resistance to
Corrosivity drinks one of the major measure for extending automotive service life.
Requirement based on auto industry to automobile coating performance is high, wide in variety, dosage is big, and needs to have unique application property
Energy and coating performance, therefore, automobile coating early has become a kind of special coating.In the country of auto industry prosperity, car paint
It is in leading position in the technology development of industrial coating, typically constitutes from the 15%-20% of coating total output, therefore it is to coating work
The influence of industry also has very important status, is the coating variety that countries in the world coatings industry is paid close attention to, in technical research
In occupy advanced and leading position.
World car has been achieved with four big updates with coating in last 100 years.From (the automobile spray of oiliness nitrate paint
Paint) to synthetic resin coated based on alkyd and phenolic aldehyde expect electrophoretic coating and high-quality synthetic resin (epoxy, alkyd amino, third
Diluted acid gathers cruel, poly- ammonia a) coating and arrives environment-friendly type coating etc. again.
Requirement for automotive coating is not only to have excellent protectiveness to car body, and be to have make us appreciating the heart it is happy
Purpose appearance characteristics, to meet different consumer demands.In order to reach this purpose, car paint takes multi-layer coating body more
System, and per pass coating all has been assigned specific function.
Summary of the invention
The present invention provides a kind of body of a motor car special coating and its preparation method and application, including priming paint, colored paint and clear
Paint, three, which matches, is sprayed at body of a motor car electrophoresis workpieces surface, so that body of a motor car has good weatherability, water-fast
Property, alcohol resistance, resistance to gasoline, and spray after formed paint film adhesion it is strong, glossiness is good, high richness, high clarity.
The technical scheme adopted by the invention is as follows:
A kind of body of a motor car special coating, the coating include priming paint, finishing coat, varnish, and the priming paint includes following weight
The raw material of part:
In above-mentioned formula, polyester resin and acrylic resin collocation meet on the basis of providing richness for priming paint
Stemness demand, SCA resin and bentonite realize excellent sag resistance, and blocked isocyanate meets the soft of body varnish
Tough and adhesive force balance.
The finishing coat includes the raw material of following parts by weight:
In above-mentioned formula, polyester resin 25-30, acrylic resin 5-10 are used cooperatively with amino resins 10-15's, are made
Finishing coat sprays to the paint film coating that is formed behind body of a motor car surface there is preferable flexibility and resistance to stone to hit performance, and it is obtained
Finishing coat black brittleness is preferable.The finishing coat function admirable obtained than pure thermosetting acrylic resin+amino resins scheme is used alone；
In this formula, introduce SCA resin and levelling agent collocation realize colored paint resist sagging and levelling it is perfectly balanced, meet automobile
The apperance requirement of coating, introduces enclosed type isocyanate resin to improve finishing coat adhesive force and flexible demand, introduces fiber
Plain resin improves surface drying, introduces conductive agent, can be adapted for electrostatic spraying.Hindered amine improves weather resistance, each original
It cooperates between material, obtains the finishing coat of high comprehensive performance.
The varnish includes the raw material of following parts by weight:
Levelling agent in the lacquer formulation is made of BYK-315N type levelling agent, BYK-390 type levelling agent by 1:1.
The UV absorbers by 1130 type UV absorbers of BASF TINUVIN of 1~1.5 parts by weight and 1~
The 292 type UV absorbers of BASF TINUVIN of 1.5 parts by weight form.
In the formula of above-mentioned varnish, based on thermosetting acrylic resin, SCA resin is introduced to guarantee the stream of product
Performance is hung, has ensured the richness of varnish；Organosilicon BYK-315N type levelling agent is added and acrylic acid BYK-390 type levelling agent comes
The clarity and surface levelling for guaranteeing paint film are shared with triazole type and hindered amines UV absorbers to guarantee paint film coating pole
Good weatherability.Blocked isocyanate improves the flexibility and adhesive force of product, and the shock resistance and resistance to stone for improving product are hit
Performance, the curing reaction for accelerating blocked isocyanate of drier.Durene, propylene glycol methyl ether acetate, front three
The collocation of benzene and DBE realize the volatilization gradient of balance on the basis of meeting solvent, ensure that the good appearance of product
Effect.
The present invention also provides the preparation method of above-mentioned body of a motor car special coating,
The priming paint the preparation method comprises the following steps:
(1) 30-35 weight of polyester resin is stirred under the conditions of 300-700 revs/min, is added under agitation
15-20 parts by weight titanium dioxide, 1-2 parts sulfuric acid barium, 0.1-0.3 parts by weight of bentonite, after adding, 700-1200 revs/min
Under the conditions of stir 10min, then, be ground to fineness less than 10 microns；
(2) raw material that step (1) obtains is stirred under the conditions of 300-700 revs/min, 10- is added under agitation
15 parts of acrylic resins, 8-12 parts of amino resins, 1-2 parts of SCA resins, 1-3 parts of sealed type isocyanates, 5-12 parts of dimethylbenzene,
2-8 parts of trimethylbenzenes, 1-5 parts of propylene glycol methyl ether acetates and 0.2-0.4 parts of levelling agents, adjust viscosity to 60-70S (25 DEG C, NK-
2), 200 mesh filter, and priming paint is made.There is good water resistance, and and base using priming paint prepared by above method and raw material
Material and finishing coat have high matching.
The finishing coat the preparation method comprises the following steps:
(1) 25-30 weight of polyester resin is stirred under the conditions of 300-700 revs/min, is added under agitation
15-20 parts by weight titanium dioxide, 0.1-0.3 parts by weight of bentonite, after adding, stir 10min under the conditions of 700-1200 revs/min,
Then, fineness is ground to less than 10 microns；
(2) raw material that step (2) obtains is stirred under the conditions of 300-700 revs/min, 5-10 is added under agitation
Part acrylic resin, 10-15 parts of amino resins, 1-2 parts of SCA resins, 1-3 parts of sealed type isocyanates, 4-12 parts of dimethylbenzene, 1-
2 parts of celluosic resins, 1-2 parts of propylene glycol methyl ether acetates, 1-2 hindered amine, 0.2-0.4 parts of conductive agents, 0.2-0.4 parts of levelling agents
With 5-12 parts of butyl acetates, viscosity is adjusted to 60-70S (25 DEG C, NK-2), finishing coat is made in the filtering of 200 mesh.
The varnish the preparation method comprises the following steps:
(1) by 50-70 parts by weight thermosetting acrylic resin, 12-18 parts by weight amino resins, 8-12 parts by weight SCA tree
Rouge and 5-10 parts by weight blocked isocyanate obtain mixture A in 300-700 revs/min of stirring 10min；
(2) trimethylbenzene of 5-10 parts by weight is stirred under the conditions of 300-700 revs/min, is added under agitation
0.2-0.4 parts of conductive agents, 0.2-0.4 parts of drier, 1130 UV absorbers of 1-1.5 parts by weight TINUVIN and 1-1.5 weight
292 UV absorbers of part TINUVIN are measured, 15min is stirred, obtains mixed material B；
(3) B is added in A, under 300-700 revs/min of stirring condition, 0.5-1 parts by weight levelling agent is added, wherein
The weight ratio of BYK-390 type levelling agent and BYK-315N type levelling agent is 1:1, stirs 15min；
(4) continue under 300-700 revs/min of stirring condition, 2-5 parts by weight durene, 2-5 parts by weight of propylene glycol is added
Methyl ether acetate, 1-2 parts by weight DBE solvent adjust viscosity to 80-100S (25 DEG C, NK-2), and the filtering of 300 mesh obtains varnish.
The present invention also provides the paint film coating systems formed by body of a motor car special coating, by the priming paint and priming paint
Diluent is deployed by 10:4；Finishing coat and finishing coat diluent are deployed by 10:4；Varnish and varnish thinner are deployed by 10:2；Then will
Priming paint, finishing coat, varnish after allotment are successively sprayed at electrophoresis workpieces surface, form paint film coating system.
The viscosity of priming paint, finishing coat, varnish after the allotment is respectively 11.0-13.0S (25 DEG C, NK-2), 12.0-
14.0S (25 DEG C, NK-2), 26.0-32.0S (25 DEG C, NK-2).
The paint film coating specific is the preparation method comprises the following steps: priming paint and priming paint diluent are deployed by weight 10:4, spraying
In electrophoresis workpieces surface, after room temperature levelling is 8-10 minutes dry, the spraying of next step top coat layer is carried out；By finishing coat and finishing coat diluent
It deploys, is sprayed on the prime coat of surface drying by weight 10:4, after room temperature levelling is 8-10 minutes dry, carry out next step varnish
Layer spraying；Varnish and varnish thinner are deployed by weight 10:2, are sprayed on the top coat layer of surface drying, room temperature levelling is dry
After 8-10 minutes, 140 DEG C ± 10 DEG C/min baking and curing 30 minutes.Paint film coating is up to being fully cured crosslinking after solidification, solvent without
Residual is not after-tacked.
The varnish of above-mentioned preparation is matched with priming paint and finishing coat, and effect of the present invention is otherwise not achieved, moreover,
In the R&D process of varnish, priming paint and finishing coat, the matching of the three comprehensively considered, priming paint provides between electrophoretic paint and finishing coat
The excellent effect of forming a connecting link, there is excellent richness, outstanding adhesive force and a covering power, to improve ground flatness,
It improves the aesthetic appearance of vehicle and improves vehicle body anti-stoning energy, provide good basis for the high clarity of composite coating,
Top coat layer realizes Spanish furnish abundant, meets the bright colors requirement of car paint, and varnish is last pipe protection layer,
Last appearance high glaze, high clarity, flatness are provided.It also provides simultaneously to sunlight, acid rain, branch or the scraping of carwash etc.
Protection.
The priming paint diluent and finishing coat diluent include the raw material of following parts by weight: 45 parts of dimethylbenzene；Trimethylbenzene 23
Part；12 parts of propylene glycol methyl ether acetate；20 parts of butyl acetate.Preparation method are as follows: the raw material of the recipe ratio is mixed
Uniformly at least 10 minutes, it can be prepared by priming paint diluent and finishing coat diluent.
The varnish thinner includes the raw material of following parts by weight: 70 parts of durene；30 parts of trimethylbenzene.Preparation method
Are as follows: the raw material of the recipe ratio is mixed evenly at least 10 minutes, can be prepared by varnish thinner.
The present invention also provides application of the body of a motor car special coating in body of a motor car processing, by the coating
Body of a motor car is sprayed to, can protect body of a motor car, beautifies vehicle body appearance.
Body of a motor car special coating disclosed by the invention, including priming paint, finishing coat and varnish, three match, gained vapour
Vehicle vehicle body special coating has good weatherability, and three's matching is excellent, and paint film coating, which can reach, is fully cured crosslinking, solvent
Noresidue is not after-tacked, moreover, spraying when good dispersion, good leveling property, thixotropy is moderate, coating uniform, without tangerine peel, without pinprick gas
Bubble, free from admixture point exist；Surface of the paint film levelling is plentiful, glossiness is good.
Specific embodiment
Embodiment 1
A kind of body of a motor car special coating, including priming paint, finishing coat and varnish；
The priming paint includes the raw material of following parts by weight, as shown in embodiment 1 in table 1:
1 base paint formulation of table
The preparation method of the priming paint, comprising the following steps:
(1) polyester resin of formula ratio is stirred under the conditions of 300-700 revs/min, titanium white is added under agitation
Powder, barium sulfate, bentonite after adding, stir 10min under the conditions of 700-1200 revs/min, then, be ground to fineness less than 10
Micron；
(2) raw material after step (1) grinding is stirred under the conditions of 300-700 revs/min, third is added under agitation
Olefin(e) acid resin, amino resins, SCA resin, sealed type isocyanates, dimethylbenzene, trimethylbenzene, propylene glycol methyl ether acetate and levelling
Agent adjusts viscosity to 60-70S (25 DEG C, NK-2), and priming paint is made in the filtering of 200 mesh.
The finishing coat includes the raw material of following parts by weight, as shown in embodiment 1 in table 2:
2 topcoat formulation of table
The preparation method of the finishing coat the following steps are included:
(1) polyester resin of formula ratio is stirred under the conditions of 300-700 revs/min, titanium white is added under agitation
Powder, bentonite after adding, stir 10min under the conditions of 700-1200 revs/min, then, be ground to fineness less than 10 microns；
(2) raw material after step (1) grinding is stirred under the conditions of 300-700 revs/min, third is added under agitation
Olefin(e) acid resin, amino resins, SCA resin, sealed type isocyanates, trimethylbenzene, celluosic resin, propylene glycol methyl ether acetate,
Hindered amine, conductive agent, levelling agent, butyl acetate adjust viscosity to 60-70S (25 DEG C, NK-2), and finishing coat is made in the filtering of 200 mesh.
The varnish includes the raw material of following parts by weight, as shown in embodiment 1 in table 3:
3 lacquer formulation of table
The preparation process of the varnish the following steps are included:
(1) by the thermosetting acrylic resin of formula ratio, amino resins, SCA resin and blocked isocyanate in 300-
700 revs/min of stirring 10min, obtain mixture A；
(2) trimethylbenzene is stirred under the conditions of 300-700 revs/min, under agitation be added conductive agent, drier,
292 UV absorbers of 1130 UV absorbers of TINUVIN and TINUVIN stir 15min, obtain mixed material B；
(3) B is added in A, under 300-700 revs/min of stirring condition, levelling agent BYK-390 and levelling agent is added
BYK-315N stirs 15min；
(4) continue under 300-700 revs/min of stirring condition, durene is added, propylene glycol methyl ether acetate, DBE are molten
Agent adjusts viscosity to 80-100S (25 DEG C, NK-2), and the filtering of 300 mesh obtains varnish.
Embodiment 2
A kind of body of a motor car special coating, including priming paint, finishing coat and varnish, the formula difference of the priming paint, finishing coat, varnish
As shown in embodiment 3 in embodiment 3 in embodiment 3 in table 1, table 2, table 3.
The priming paint, finishing coat, varnish preparation method respectively with the preparation side of priming paint, finishing coat, varnish in embodiment 1
Method.
Embodiment 3
A kind of body of a motor car special coating, including priming paint, finishing coat and varnish, the formula difference of the priming paint, finishing coat, varnish
As shown in embodiment 3 in embodiment 3 in embodiment 3 in table 1, table 2, table 3.
The priming paint, finishing coat, varnish preparation method respectively with the preparation side of priming paint, finishing coat, varnish in embodiment 1
Method.
Comparative example 1
A kind of body of a motor car special coating, including priming paint, finishing coat and varnish；
The priming paint includes the raw material of following parts by weight, as shown in table 4:
4 base paint formulation of table
| Name of material | Model | Supplier | Parts by weight | |
| 1 | Polyester resin | B151 | Spring breeze | 35 |
| 2 | Acrylic resin | C1703 | Dan Dilai | 12.7 |
| 3 | Amino resins | B021B | Spring breeze | 12 |
| 4 | Closure isocyanates | ESI3075 | Dan Dilai | 3 |
| 5 | SCA resin | 4694 | ALLIO | 2 |
| 6 | Levelling agent | NTE-100A | Dan Dilai | 0.2 |
| 7 | Titanium dioxide | CR828 | Ke Meiji | 18 |
| 8 | Bentonite | BENTONE28 | Hamming this | 0.1 |
| 9 | Barium sulfate | 2 | ||
| 10 | Propylene glycol methyl ether acetate | It is domestic | It is domestic | 2 |
| 11 | Toluene | It is domestic | It is domestic | 5 |
| 12 | Trimethylbenzene | It is domestic | It is domestic | 8 |
The preparation method of the priming paint, comprising the following steps:
(1) 35 weight of polyester resins are stirred under the conditions of 300-700 revs/min, 18 weights is added under agitation
Part titanium dioxide, 2 parts sulfuric acid barium, 0.1 parts by weight of bentonite are measured, after adding, is stirred under the conditions of 700-1200 revs/min
Then 10min is ground to fineness less than 10 microns；
(2) raw material after step (1) grinding is stirred under the conditions of 300-700 revs/min, is added under agitation
12.7 parts of acrylic resins, 12 parts of amino resins, 2 parts of SCA resins, 3 parts of sealed type isocyanates, 5 parts of toluene, 8 parts of trimethylbenzenes,
2 parts of propylene glycol methyl ether acetates and 0.2 part of levelling agent adjust viscosity to 60-70S (25 DEG C, NK-2), and bottom is made in the filtering of 200 mesh
Paint.
The finishing coat includes the raw material of following parts by weight, as shown in table 5:
5 topcoat formulation of table
| Name of material | Model | Supplier | Parts by weight | |
| 1 | Polyester resin | B151 | Spring breeze | 30 |
| 2 | Acrylic resin | UAR-201-75F2 | Excellent section | 8 |
| 3 | Amino resins | 058P | Excellent section | 12.6 |
| 4 | Celluosic resin | 381-0.5 (20%) | Yi Shiman | 2 |
| 5 | SCA resin | 4694 | ALLIO | 1.5 |
| 6 | Sealed type isocyanates | ESI3075 | Dan Dilai | 2.5 |
| 7 | Titanium dioxide | R-919 | Shandong Down | 20 |
| 8 | Bentonite | BENTONE28 | Hamming this | 0.1 |
| 9 | Hindered amine | TINUVIN 292 | BASF | 1 |
| 10 | Conductive agent | ES-80 | BYK | 0.2 |
| 11 | Levelling agent | NTE-100A | Dan Dilai | 0.3 |
| 12 | Propylene glycol methyl ether acetate | It is domestic | It is domestic | 5 |
| 13 | Butyl acetate | It is domestic | It is domestic | 10 |
| 14 | Trimethylbenzene | It is domestic | It is domestic | 10 |
The preparation method of the finishing coat the following steps are included:
(1) 30 weight of polyester resins are stirred under the conditions of 300-700 revs/min, 20 weights is added under agitation
Part titanium dioxide, 0.1 parts by weight of bentonite are measured, after adding, 10min is stirred under the conditions of 700-1200 revs/min, then, is ground to
Fineness is less than 10 microns；
(2) raw material after step (1) grinding is stirred under the conditions of 300-700 revs/min, 8 is added under agitation
Part acrylic resin, 12.6 parts of amino resins, 1.5 parts of SCA resins, 2.5 parts of sealed type isocyanates, 10 parts of trimethylbenzenes, 2 parts of fibres
Plain resin, 5 parts of propylene glycol methyl ether acetates, 1 part of hindered amine, 0.2 part of conductive agent, 0.3 part of levelling agent, 10 parts of butyl acetates are tieed up,
Viscosity is adjusted to 60-70S (25 DEG C, NK-2), finishing coat is made in the filtering of 200 mesh.
The varnish includes the raw material of following parts by weight, as shown in table 6:
6 lacquer formulation of table
| Name of material | Model | Supplier | Parts by weight | |
| 1 | Thermosetting acrylic resin | 1766 | Niu Peisi | 60 |
| 2 | Amino resins | YH8372 | Dan Dilai | 13.1 |
| 3 | SCA resin | 9641 | ALLIO | 8 |
| 4 | Closure isocyanates | K60X | Bayer | 5.5 |
| 5 | Conductive agent | ES80 | BYK | 0.3 |
| 6 | Drier | LIT-18 | Dan Dilai | 0.2 |
| 7 | UV absorbers | TINUVIN 1130 | BASF | 1 |
| 8 | UV absorbers | TINUVIN 292 | BASF | 1 |
| 9 | Levelling agent | BYK-390 | BYK | 0.3 |
| 11 | Levelling agent | BYK-315N | BYK | 0.3 |
| 12 | Durene | It is domestic | It is domestic | 2 |
| 13 | Propylene glycol methyl ether acetate | It is domestic | It is domestic | 2 |
| 14 | Trimethylbenzene | It is domestic | It is domestic | 5 |
| 15 | DBE solvent | It is domestic | It is domestic | 1 |
The preparation process of the varnish the following steps are included:
(1) by 60 parts by weight thermosetting acrylic resins, 13.1 parts by weight amino resins, 8 parts by weight SCA resins and 5.5
Parts by weight blocked isocyanate obtains mixture A in 300-700 revs/min of stirring 10min；
(2) trimethylbenzene of 5 parts by weight is stirred under the conditions of 300-700 revs/min, 0.3 part is added under agitation
Conductive agent, 292 ultraviolet light of 0.2 part of drier, 1 parts by weight TINUVIN, 1130 UV absorbers and 1 parts by weight TINUVIN
Absorbent stirs 15min, obtains mixed material B；
(3) B is added in A, under 300-700 revs/min of stirring condition, 0.3 parts by weight levelling agent BYK-390 is added
With 0.3 parts by weight levelling agent BYK-315N, 15min is stirred；
(4) continue under 300-700 revs/min of stirring condition, 2 parts by weight durenes, 2 parts by weight of propylene glycol methyl ethers are added
Acetate, 1 parts by weight DBE solvent adjust viscosity to 80-100S (25 DEG C, NK-2), and the filtering of 300 mesh obtains varnish.
Comparative example 2
A kind of body of a motor car special coating, including priming paint, finishing coat and varnish；
The priming paint includes the raw material of following parts by weight, as shown in table 7:
7 base paint formulation of table
| Name of material | Model | Supplier | Parts by weight | |
| 1 | Polyester resin | 173 | Niu Peisi | 35 |
| 2 | Acrylic resin | C1703 | Dan Dilai | 10 |
| 3 | Amino resins | YH8372 | Dan Dilai | 10 |
| 4 | Closure isocyanates | ESI3075 | Dan Dilai | 3 |
| 5 | SCA resin | 4694 | ALLIO | 2 |
| 6 | Levelling agent | NTE-100A | Dan Dilai | 0.2 |
| 7 | Titanium dioxide | R-919 | Shandong Down | 15 |
| 8 | Bentonite | BENTONE28 | Hamming this | 0.1 |
| 9 | Barium sulfate | 2 | ||
| 10 | Propylene glycol methyl ether acetate | It is domestic | It is domestic | 2.7 |
| 11 | Durene | It is domestic | It is domestic | 8 |
| 12 | Trimethylbenzene | It is domestic | It is domestic | 12 |
The preparation method of the priming paint, comprising the following steps:
(1) 35 weight of polyester resins are stirred under the conditions of 300-700 revs/min, 15 weights is added under agitation
Part titanium dioxide, 2 parts sulfuric acid barium, 0.1 parts by weight of bentonite are measured, after adding, is stirred under the conditions of 700-1200 revs/min
Then 10min is ground to fineness less than 10 microns；
(2) raw material after step (1) grinding is stirred under the conditions of 300-700 revs/min, 10 is added under agitation
Part acrylic resin, 10 parts of amino resins, 2 parts of SCA resins, 3 parts of sealed type isocyanates, 8 parts of durenes, 12 parts of trimethylbenzenes,
2.7 parts of propylene glycol methyl ether acetates and 0.2 part of levelling agent adjust viscosity to 60-70S (25 DEG C, NK-2), and the filtering of 200 mesh is made
Priming paint.
The finishing coat includes the raw material of following parts by weight, as shown in table 8:
8 topcoat formulation of table
The preparation method of the finishing coat the following steps are included:
(1) 30 weight of polyester resins are stirred under the conditions of 300-700 revs/min, 16 weights is added under agitation
Part titanium dioxide, 0.1 parts by weight of bentonite are measured, after adding, 10min is stirred under the conditions of 700-1200 revs/min, then, is ground to
Fineness is less than 10 microns；
(2) raw material after step (1) grinding is stirred under the conditions of 300-700 revs/min, 5 is added under agitation
Part acrylic resin, 12 parts of amino resins, 2 parts of SCA resins, 3 parts of sealed type isocyanates, 11.3 parts of trimethylbenzenes, 2 parts of celluloses
Resin, 5 parts of propylene glycol methyl ether acetates, 1 part of hindered amine, 0.2 part of conductive agent, 0.4 part of levelling agent, 12 parts of butyl acetates, adjust
Finishing coat is made in viscosity to 60-70S (25 DEG C, NK-2), the filtering of 200 mesh.
The varnish includes the raw material of following parts by weight, as shown in table 9:
9 lacquer formulation of table
| Name of material | Model | Supplier | Parts by weight | |
| 1 | Thermosetting acrylic resin | 8530 | Same moral | 50 |
| 2 | Amino resins | 058 | Excellent section | 10 |
| 3 | SCA resin | 9641 | ALLIO | 12 |
| 4 | Closure isocyanates | ESI3075 | Dan Dilai | 10 |
| 5 | Conductive agent | ES80 | BYK | 0.2 |
| 6 | Drier | LIT-18 | Dan Dilai | 0.2 |
| 7 | UV absorbers | TINUVIN 1130 | BASF | 1 |
| 8 | UV absorbers | TINUVIN 292 | BASF | 1 |
| 9 | Levelling agent | BYK-390 | BYK | 0.3 |
| 10 | Levelling agent | BYK-315N | BYK | 0.2 |
| 11 | Durene | It is domestic | It is domestic | 3 |
| 12 | Propylene glycol methyl ether acetate | It is domestic | It is domestic | 3 |
| 13 | Toluene | It is domestic | It is domestic | 7.3 |
| 14 | DBE solvent | It is domestic | It is domestic | 1.5 |
The preparation process of the varnish the following steps are included:
(1) by 50 parts by weight thermosetting acrylic resins, 10 parts by weight amino resins, 12 parts by weight SCA resins and 10 weights
Part blocked isocyanate is measured in 300-700 revs/min of stirring 10min, obtains mixture A；
(2) toluene of 7.3 parts by weight is stirred under the conditions of 300-700 revs/min, 0.2 part is added under agitation
Conductive agent, 292 ultraviolet light of 0.2 part of drier, 1 parts by weight TINUVIN, 1130 UV absorbers and 1 parts by weight TINUVIN
It absorbs, stirs 15min, obtain mixed material B；
(3) B is added in A, under 300-700 revs/min of stirring condition, 0.3 parts by weight levelling agent BYK-390 is added
With 0.2 parts by weight levelling agent BYK-315N, 15min is stirred；
(4) continue under 300-700 revs/min of stirring condition, 3 parts by weight 150#, 3 parts by weight of propylene glycol methyl ether vinegar are added
Acid esters, 1.5 parts by weight DBE solvents adjust viscosity to 80-100S (25 DEG C, NK-2), the filtering of 300 mesh, obtain varnish.
Embodiment 4
The application method of priming paint, finishing coat, varnish in body of a motor car special coating
The priming paint in body of a motor car special coating, the finishing coat, varnish difference that embodiment 1-3, comparative example 1-2 are prepared
After diluent allotment, body of a motor car electrophoresis workpieces are sprayed at, method particularly includes:
By priming paint that each embodiment obtains and priming paint diluent by 10:4 deploy to viscosity be 11.0-13.0S (25 DEG C, NK-
2)；It is sprayed at electrophoresis workpieces surface, after room temperature levelling is 8-10 minutes dry, carries out the spraying of next step top coat layer；
By finishing coat that each embodiment obtains and finishing coat diluent by 10:4 deploy to viscosity be 12.0-14.0S (25 DEG C, NK-
2)；It is sprayed on the prime coat of surface drying, after room temperature levelling is 8-10 minutes dry, carries out the spraying of next step layer of varnish；
By varnish that each embodiment obtains and varnish thinner by 10:2 deploy to viscosity be 26.0-32.0S (25 DEG C, NK-
2)；It is sprayed on the top coat layer of surface drying, after room temperature levelling is 8-10 minutes dry, 140 DEG C/min is dried 30 minutes, forms paint film
Then coating system detects paint film property, the results are shown in Table 10.
The priming paint diluent and finishing coat diluent include the raw material of following parts by weight:
The dimethylbenzene is that Bayer is domestic；
The trimethylbenzene is that Bayer is domestic；
The propylene glycol methyl ether acetate is that Bayer is domestic；
The butyl acetate is that Bayer is domestic.
The middle lacquer diluent and colored paint diluent the preparation method is as follows:
In a reservoir by the xylene solvent of parts by weight 45, the trimethylbenzene of parts by weight 23, weight 12 propylene glycol monomethyl ether vinegar
Acid esters and the butyl acetate solvent of parts by weight 20 are mixed evenly after ten minutes, obtain middle lacquer diluent and colored paint diluent.
The varnish thinner includes the raw material of following parts by weight:
70 parts of durene；
30 parts of trimethylbenzene；
The durene is domestic；
The trimethylbenzene is domestic.
The varnish thinner the preparation method comprises the following steps: be added the durene of parts by weight 70 and the front three of parts by weight 30 in a reservoir
Benzene is mixed evenly after ten minutes, obtains finishing coat diluent.
10 paint film property test result of table
Each performance detection standard is as follows:
1. being adapted to the performance of spraying
Priming paint, finishing coat, varnish spraying when good dispersion, levelability is moderate, and thixotropy is good, coating uniform, without obvious tangerine peel,
Without pinprick bubble, free from admixture point exists.
2. being adapted to solidify the performance of drying；
140 DEG C ± 10 DEG C of baking temperature (coating is away from top 100mm spatial dimension air themperature) toasts 30 minutes；Through solid
Coating up to crosslinking is fully cured, do not after-tack by solvent noresidue after change.Coating should test the above-mentioned item of drying box temperature reference without discoloration
Part.(vehicle body baking vanish is all high-temperature baking, this technique using newest 3C1B technique and in prime spray surface drying after i.e. spray-coating surface
Paint, i.e. lacquer varnish, varnish carries out heated baking solidification after spraying surface drying after finishing coat sprays surface drying)
3. hardness
1H Mitsubishi pencil.
4. adhesive force
Hundred lattice methods of testing should be without chipping obscission, and coating grid is interior without obscission.Oil-free varnish stain on 3M adhesive tape.
5. gloss
It is required that measurement of luster value >=96 (60 °)
6. resistance to soaked:
By sample periphery gummed paper edge sealing, it is placed in 40 DEG C ± 2 DEG C neutral hot water storgaes, is taken out after soaked 10 days, restore 2
It is tested after hour, painting layer face should be without expansion, and without blister, without falling off, no loss of gloss phenomenon, adhesive force tests≤0 grade.
7. alkali resistance (25 DEG C × for 24 hours)
0.1mol/L NaoH, (23 ± 2) DEG C × for 24 hours, composite plate paint film is without significant change, E≤1 color difference △ (45° angle).
No obvious loss of gloss blistering, is expanded, is fallen off；
8. resistance to gasoline: resistance to gasoline:
For 24 hours, paint film appearance corrugationless, obviously soften, blister, fall off, color difference and cosmetic variation.Naturally dry is surveyed attached for 24 hours
Put forth effort 0 grade or 1 grade, hardness >=HB.The variation such as soaking at room temperature flawless, blistering, peeling, discoloration；Slight paint film is allowed to soften
9. resistance to artificial accelerated aging:
Ultraviolet aging, 2000h, E≤3.0 △；Gloss >=85 (60 °) paint film is without cracking, powder of detached etc.；Appearance without
Obvious shortcoming；Adhesive force: 0 grade or 1 grade.
The obtained priming paint of various embodiments of the present invention, finishing coat and varnish are met the following requirements:
1. system and environmental requirement
Priming paint, finishing coat, varnish are high temperature baking vanish.Environmentally friendly numerical value meets European Union's household electrical appliance harmful substance limitation standard.
2. appearance
It must free from dust, particle, impurity in 2.1 containers；
Color designation is marked in 2.2 colors and packaging, model is consistent；
2.3 coating mobility will be got well, and cannot be joined at drawing skin shape or solidification glue.
3. Storage period
Under room temperature, the coating shelf-life is not opened more than or equal to 12 months, the shelf-life is more than or equal to 6 months after unlatching.
The above-mentioned detailed description carried out referring to embodiment to body of a motor car special coating and its preparation method and application, is to say
Bright property without being restrictive, several embodiments can be enumerated according to limited range, therefore of the invention total not departing from
Change and modification under body design, should belong within protection scope of the present invention.
Claims (8)
1. a kind of body of a motor car special coating, which is characterized in that the coating includes priming paint, finishing coat, varnish, and the priming paint includes
The raw material of following parts by weight:
Polyester resin 30-35；
Acrylic resin 10-15；
Amino resins 8-12；
SCA resin 1-2；
Blocked isocyanate 1-3；
Titanium dioxide 15-20；
Bentonite 0.1-0.3；
Barium sulfate 1-2；
Levelling agent 0.2-0.4；
Propylene glycol methyl ether acetate 1-5；
Trimethylbenzene 2-8；
Dimethylbenzene 5-12；
The varnish includes the raw material of following parts by weight:
Thermosetting acrylic resin 50-70；
Amino resins 12-18；
SCA resin 8-12；
Blocked isocyanate 5-10；
Conductive agent 0.2-0.4；
Drier 0.2-0.4；
UV absorbers 2-3；
Levelling agent 0.5-1；
Durene 2-5；
Propylene glycol methyl ether acetate 2-5；
Trimethylbenzene 5-10；
DBE solvent 1-2；
The finishing coat includes the raw material of following parts by weight:
Polyester resin 25-30；
Acrylic resin 5-10；
Amino resins 10-15；
Celluosic resin 1-2；
SCA resin 1-2；
Blocked isocyanate 1-3；
Titanium dioxide 15-20；
Bentonite 0.1-0.3；
Hindered amine 1-2；
Conductive agent 0.2-0.4；
Levelling agent 0.2-0.4；
Propylene glycol methyl ether acetate 3-5；
Trimethylbenzene 4-12；
Butyl acetate 5-12.
2. coating according to claim 1, which is characterized in that the levelling agent in the lacquer formulation is by BYK-315N type stream
Flat agent, BYK-390 type levelling agent are formed by 1:1.
3. coating according to claim 1, which is characterized in that the UV absorbers by 1 ~ 1.5 parts by weight BASF
1130 type UV absorbers of TINUVIN and the 292 type UV absorbers of BASF TINUVIN of 1 ~ 1.5 parts by weight composition.
4. the preparation method of body of a motor car special coating according to claim 1 to 3, it is characterised in that: described
Priming paint the preparation method comprises the following steps:
(1) 30-35 weight of polyester resin is stirred under the conditions of 300-700 revs/min, 15-20 is added under agitation
Parts by weight titanium dioxide, 1-2 parts sulfuric acid barium, 0.1-0.3 parts by weight of bentonite, after adding, under the conditions of 700-1200 revs/min
Then stirring 10min is ground to fineness less than 10 microns；
(2) raw material that step (1) obtains is stirred under the conditions of 300-700 revs/min, 10-15 parts is added under agitation
Acrylic resin, 8-12 part amino resins, 1-2 parts of SCA resins, 1-3 parts of blocked isocyanates, 5-12 parts of dimethylbenzene, 2-8 parts
Trimethylbenzene, 1-5 part propylene glycol methyl ether acetate and 0.2-0.4 parts of levelling agents adjust viscosity to 60-70S, and viscosity test condition is
25 DEG C, NK-2, the filtering of 200 mesh, are made priming paint.
5. the preparation method according to claim 4, which is characterized in that the finishing coat the preparation method comprises the following steps:
(1) 25-30 weight of polyester resin is stirred under the conditions of 300-700 revs/min, 15-20 is added under agitation
Parts by weight titanium dioxide, 0.1-0.3 parts by weight of bentonite after adding, stir 10min under the conditions of 700-1200 revs/min, then,
Fineness is ground to less than 10 microns；
(2) raw material that step (1) obtains is stirred under the conditions of 300-700 revs/min, 5-10 part third is added under agitation
Olefin(e) acid resin, 10-15 part amino resins, 1-2 parts of SCA resins, 1-3 parts of blocked isocyanates, 4-12 parts of trimethylbenzenes, 1-2 parts
Celluosic resin, 1-2 part propylene glycol methyl ether acetate, 1-2 hindered amine, 0.2-0.4 parts of conductive agents, 0.2-0.4 parts of levelling agents and
5-12 parts of butyl acetates, adjustment viscosity to 60-70S, viscosity test condition are 25 DEG C, NK-2, and finishing coat is made in the filtering of 200 mesh.
6. the preparation method according to claim 4, which is characterized in that the varnish the preparation method comprises the following steps:
(1) by 50-70 parts by weight thermosetting acrylic resin, 12-18 parts by weight amino resins, 8-12 parts by weight SCA resin and
5-10 parts by weight blocked isocyanate obtains mixture A in 300-700 revs/min of stirring 10min；
(2) trimethylbenzene of 5-10 parts by weight is stirred under the conditions of 300-700 revs/min, 0.2-0.4 is added under agitation
Part conductive agent, 0.2-0.4 parts of drier, 1130 UV absorbers of 1-1.5 parts by weight TINUVIN and 1-1.5 parts by weight
292 UV absorbers of TINUVIN stir 15min, obtain mixed material B；
(3) B is added in A, under 300-700 revs/min of stirring condition, 0.5-1 parts by weight levelling agent is added, wherein BYK-
The weight ratio of 390 type levelling agents and BYK-315N type levelling agent is 1:1, stirs 15min；
(4) continue under 300-700 revs/min of stirring condition, 2-5 parts by weight durene, 2-5 parts by weight of propylene glycol methyl ether is added
Acetate, 1-2 parts by weight DBE, adjustment viscosity to 80-100S, viscosity test condition are 25 DEG C, NK-2, and the filtering of 300 mesh obtains clearly
Paint.
7. the paint film coating system that body of a motor car special coating according to claim 1 to 3 is formed, feature
It is: the priming paint and priming paint diluent is deployed by 10:4；Finishing coat and finishing coat diluent are deployed by 10:4；Varnish and varnish
Diluent is deployed by 10:2；Then priming paint, finishing coat, the varnish after allotment are successively sprayed at electrophoresis workpieces surface, form paint film
Coating system.
8. application of the body of a motor car special coating according to claim 1 to 3 in body of a motor car processing.
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| CN108912988A (en) * | 2017-08-30 | 2018-11-30 | 山东科耀化工有限公司 | High solid low viscosity Hydroxylated acrylic resin, preparation method and vehicle baking finish |
| CN108976892A (en) * | 2018-06-27 | 2018-12-11 | 常州光辉化工有限公司 | A kind of surface modifier in automobile bloom finishing coat |
| CN109456662A (en) * | 2018-08-23 | 2019-03-12 | 太仓怡泰霖智能科技有限公司 | A kind of aqueous priming paint and preparation method thereof for body of a motor car |
| CN109401378A (en) * | 2018-10-10 | 2019-03-01 | 江苏熙成新材料科技有限公司 | A kind of base paint formulation with high adhesion force |
| CN110669399A (en) * | 2019-11-05 | 2020-01-10 | 广州立邦涂料有限公司 | Sealing rubber strip yellowing resistant varnish for automobile and preparation method and application thereof |
| CN110922847B (en) * | 2019-12-04 | 2021-09-10 | 重庆华辉涂料有限公司 | High-saturation red metallic paint, and preparation method and spraying method thereof |
| CN112708317A (en) * | 2021-01-15 | 2021-04-27 | 江阴市荣新塑化有限公司 | High-wear-resistance weather-resistant finish paint for spraying automobile aluminum material and preparation method thereof |
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| CN102010648A (en) * | 2010-11-29 | 2011-04-13 | 常州市武进晨光金属涂料有限公司 | Floating coat-free shining base coat used for metal pieces and preparation method thereof |
| CN102414283A (en) * | 2009-04-21 | 2012-04-11 | 巴斯夫涂料有限公司 | Water-free high-solids base paints, production thereof and use thereof for producing multilayer paint coatings, and multilayer paint coatings comprising a base coating made of water-free high-solids base paint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102414283A (en) * | 2009-04-21 | 2012-04-11 | 巴斯夫涂料有限公司 | Water-free high-solids base paints, production thereof and use thereof for producing multilayer paint coatings, and multilayer paint coatings comprising a base coating made of water-free high-solids base paint |
| CN102010648A (en) * | 2010-11-29 | 2011-04-13 | 常州市武进晨光金属涂料有限公司 | Floating coat-free shining base coat used for metal pieces and preparation method thereof |
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