CN112495740A - High-color-fixation paint and 2K varnish coating environment-friendly process - Google Patents
High-color-fixation paint and 2K varnish coating environment-friendly process Download PDFInfo
- Publication number
- CN112495740A CN112495740A CN202011299420.6A CN202011299420A CN112495740A CN 112495740 A CN112495740 A CN 112495740A CN 202011299420 A CN202011299420 A CN 202011299420A CN 112495740 A CN112495740 A CN 112495740A
- Authority
- CN
- China
- Prior art keywords
- varnish
- coating
- paint
- spraying
- fixation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2502/00—Acrylic polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2508/00—Polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides an environment-friendly coating process of high-color-fixing paint and 2K varnish, which can improve the appearance level of finish paint, improve the scratch resistance of the finish paint and reduce the emission of VOCs. The coating flow of the coating environment-friendly process adopts the steps of 3C2B coating process: the method comprises the steps of intermediate coating spraying, intermediate coating drying, intermediate coating polishing, wiping, high-fixation paint spraying, varnish spraying and coating drying, wherein 2K varnish is adopted in the varnish spraying step. The method is improved on the existing mature 3C2B coating process step, adopts a new 3C2B high-solid-content colored paint +2K varnish coating process, and has the characteristics of good environmental protection, stable coating quality, easy control, low operation difficulty, low operation energy consumption and low material cost; and the method is easy to implement and strong in popularization, and is an excellent choice for the transformation of the existing solvent type coating production line.
Description
Technical Field
The invention relates to the technical field of automobile coating processes, in particular to a high-color-fixation paint and 2K varnish coating environment-friendly process.
Background
At present, the solvent-type high-fixation paint spraying of the automobile generally adopts a 3C2B high-solid-solution type colored paint process. This process has the following disadvantages: the problems of reworked vehicle body external shrinkage cavity and internal paint shrinkage caused by strong paint film shrinkage in the curing process of 3C2B solvent type high solid color paint and 1K high solid varnish technology are solved; secondly, the high-solid metallic paint and the 1K high-solid varnish are poor in matching performance, short-wave data exceeds the standard, the appearance level is limited and cannot be improved, and the appearance performance and the competitiveness of the product are influenced; the scratch resistance of the finish paint of the high solid color paint and 1K varnish process is weak; and fourthly, the discharge amount of VOCs is high, and the environmental protection performance is weak. Aiming at the problems that reworking can be reduced as far as possible at present, or parts which are easy to shrink are polished in advance before the second spraying of reworking; aiming at the problem, the optimization is usually carried out by increasing the thickness of the varnish film and profiling by a robot, but the actual effect is not good; aiming at the problem that the scratch resistance of the 1K high-solid varnish is influenced by the paint formula; aiming at the problem, the environmental protection level of coating is generally improved by modifying the water-based paint process in the industry, but the investment is high, the modification amount is large, and the manufacturing cost of a single vehicle is increased.
Disclosure of Invention
The invention aims to provide an environment-friendly coating process of high-color-fixing paint and 2K varnish, which can improve the appearance level of finish paint, improve the scratch resistance of the finish paint and reduce the emission of VOCs.
The environment-friendly coating process of the high-color-fixing paint and the 2K varnish is characterized in that the coating process adopts the steps of 3C 2B: the method comprises the steps of intermediate coating spraying, intermediate coating drying, intermediate coating polishing, wiping, high-fixation paint spraying, varnish spraying and coating drying, wherein 2K varnish is adopted in the varnish spraying step.
The method is improved on the basis of the existing mature 3C2B coating process, adopts a new 3C2B high-solid-content colored paint +2K varnish coating process, has the characteristics of good environmental protection, stable and easily controlled coating quality, low operation difficulty, low operation energy consumption and low material cost, not only solves the problems of appearance and construction process limitation of the original process, but also further reduces the generation amount of VOCs and waste residues, is beneficial to environmental protection and solves the problem that the VOCs emission of the traditional solvent coating production line does not reach the standard; and the method is easy to implement and strong in popularization, and is an excellent choice for the transformation of the existing solvent type coating production line.
Further, the 2K varnish comprises a curing agent component and a 2K varnish component, and the curing agent component and the 2K varnish component are fed to a nozzle to perform spraying operation after passing through a static mixer. The double 2K varnish two components are mixed by the static mixer before use, so that the blockage of a nozzle and a pipeline caused by the solidification of the 2K varnish can be prevented.
Further, an outlet of the static mixer is connected with an inlet of the nozzle, and a robot spraying rotary cup is arranged at the outlet of the nozzle. Like this in atomizing device, the two-component of 2K varnish flows through static mixer after directly supplying the spraying rotary cup of robot through the nozzle for the pipeline of paint after mixing is extremely short, is convenient for clean fast, and paint loss is less.
Further, in the step of spraying the high color fixing paint, microgel is added into a high color fixing paint solvent. By using the microgel with high estimated content to replace the traditional CAB resin, the surface drying and rheological speed of the high-solid coating can be optimally controlled, and the appearance quality of the coating is ensured.
Further, an acrylic component, a polyester resin component and an amino resin component are added to the solvent of the high solid color paint. Acrylic acid can increase chemical reaction groups and play a role in dispersion; the low-viscosity polyester resin can improve the construction solid content while reducing the using amount of the diluent; the high-reactivity and high-NV amino resin can improve the bridging density, play a role in stabilizing the auxiliary agent and improve the storage stability of the product.
Further, the method also comprises a verification step after the coating is dried: the method comprises the steps of manual accelerated aging verification, scratch resistance verification, acid rain resistance verification, iron powder resistance verification and long and short wave verification of an H plane and a V vertical plane of the orange peel with the paint appearance on the 2K varnish coating. And ensuring the coating quality through a verification step.
Further, the thickness of a paint film in the middle coating spraying step is 30-45 μm, the thickness of a paint film sprayed by the high-fixation paint is 15-25 μm, and the thickness of a paint film sprayed by the varnish is 45-60 μm. After the 2K varnish is used, the excellent anti-sagging performance of the 2K varnish can be utilized, the anti-sagging limit film thickness of the traditional 1K varnish and the 1K high-solid content varnish is increased from 50 micrometers to 70 micrometers, and the appearance level and the performance of the paint on a vehicle body are greatly improved.
Drawings
FIG. 1 shows the mechanism of action of the acrylic acid component of the present invention.
FIG. 2 shows the mechanism of action of the amino resin of the present invention.
Detailed Description
The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.
The invention relates to a high color fixing paint and 2K varnish coating environment-friendly process, wherein the coating process adopts the steps of 3C2B coating: the method comprises the steps of intermediate coating spraying, intermediate coating drying, intermediate coating polishing, wiping, high-fixation paint spraying, varnish spraying and coating drying, wherein 2K varnish is adopted in the varnish spraying step. The method adopts 2K varnish to replace 1K varnish in the traditional 3C2B coating process in the varnish spraying, and the corresponding high-color-fixing paint can also be subjected to certain adaptive component improvement.
The method is improved on the basis of the existing mature 3C2B coating process, adopts a new 3C2B high-solid-content colored paint +2K varnish coating process, has the characteristics of good environmental protection, stable and easily controlled coating quality, low operation difficulty, low operation energy consumption and low material cost, not only solves the problems of appearance and construction process limitation of the original process, but also further reduces the generation amount of VOCs and waste residues, is beneficial to environmental protection and solves the problem that the VOCs emission of the traditional solvent coating production line does not reach the standard; and the method is easy to implement and strong in popularization, and is an excellent choice for the transformation of the existing solvent type coating production line. The invention is used for carrying out front-back comparison after the existing 3C2B process is modified, and the ratio of the VOCs single-vehicle production amount of the modified 3C2B process to the VOCs single-vehicle production amount of the existing water paint process is shown in the following table 1:
after the coating is dried, the method also comprises a verification step: the method comprises the steps of manual accelerated aging verification, scratch resistance verification, acid rain resistance verification, iron powder resistance verification and long and short wave verification of an H plane and a V vertical plane of the orange peel with the paint appearance on the 2K varnish coating. And ensuring the coating quality through a verification step.
Wherein, table 2 below is a comparison of the 2K clear coat with the conventional 1K clear coat for the validation performance, including:
TABLE 2
Table 3 below is a verification of the short and long waves of the H-plane and V-plane of the orange peel in the appearance of the paint of the present invention compared to the prior art, and it can be seen that the appearance of the paint using the present invention is improved compared to the prior art:
TABLE 3
As a preferred embodiment, the 2K varnish comprises a curing agent component and a 2K varnish component, and the curing agent component and the 2K varnish component are fed to a nozzle through a static mixer to perform spraying operation. The double 2K varnish two components are mixed by the static mixer before use, so that the blockage of a nozzle and a pipeline caused by the solidification of the 2K varnish can be prevented.
Preferably, the outlet of the static mixer is connected with the inlet of the nozzle, and the outlet of the nozzle is provided with a robot spraying rotary cup. Like this in atomizing device, the two-component of 2K varnish flows through static mixer after directly supplying the spraying rotary cup of robot through the nozzle for the pipeline of paint after mixing is extremely short, is convenient for clean fast, and paint loss is less.
Preferably, in the step of spraying the high fixation paint, the microgel is added into the high fixation paint solvent. By using the microgel with high estimated content to replace the traditional CAB resin, the surface drying and rheological speed of the high-solid coating can be optimally controlled, and the appearance quality of the coating is ensured.
Preferably, the solvent of the high-solid paint contains an acrylic component, a polyester resin component and an amino resin component. Acrylic acid can increase chemical reaction groups and play a role in dispersion; the low-viscosity polyester resin can improve the construction solid content while reducing the using amount of the diluent; the high-reactivity and high-NV amino resin can improve the bridging density, play a role in stabilizing the auxiliary agent and improve the storage stability of the product. The mechanism of action of the acrylic component is shown in FIG. 1, and the mechanism of action of the amino resin is shown in FIG. 2.
Preferably, the thickness of the paint film in the middle coating spraying step is 30-45 μm, the thickness of the paint film sprayed by the high-fixation paint is 15-25 μm, and the thickness of the paint film sprayed by the varnish is 45-60 μm. After the 2K varnish is used, the excellent anti-sagging performance of the 2K varnish can be utilized, the anti-sagging limit film thickness of the traditional 1K varnish and the 1K high-solid content varnish is increased from 50 micrometers to 70 micrometers, and the appearance level and the performance of the paint on a vehicle body are greatly improved.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description, as long as the invention is capable of being practiced without modification in any way whatsoever, and is capable of other applications without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A high color fixing paint and 2K varnish coating environment-friendly process is characterized in that a coating process adopts the steps of 3C2B coating: the method comprises the steps of intermediate coating spraying, intermediate coating drying, intermediate coating polishing, wiping, high-fixation paint spraying, varnish spraying and coating drying, wherein 2K varnish is adopted in the varnish spraying step.
2. The environment-friendly process for high-fixation paint plus 2K varnish coating according to claim 1, wherein the 2K varnish comprises a curing agent component and a 2K varnish component, and the curing agent component and the 2K varnish component are supplied to a nozzle to perform spraying operation after passing through a static mixer.
3. The environment-friendly process for high-fixation paint plus 2K varnish coating according to claim 2, wherein the outlet of the static mixer is connected with the inlet of the nozzle, and the outlet of the nozzle is provided with a robot spraying rotary cup.
4. The environment-friendly process for coating a high fixation paint plus 2K varnish according to claim 1, wherein in the high fixation paint spraying step, microgel is added to a high fixation paint solvent.
5. The environment-friendly process for coating high-fixation paint plus 2K varnish according to claim 1, characterized in that an acrylic component, a polyester resin component and an amino resin component are added in a solvent of the high-fixation paint.
6. The high fixation paint plus 2K varnish application environment-friendly process according to any one of claims 1 to 5, characterized by further comprising the validation step after the coating is dried: the method comprises the steps of manual accelerated aging verification, scratch resistance verification, acid rain resistance verification, iron powder resistance verification and long and short wave verification of an H plane and a V vertical plane of the orange peel with the paint appearance on the 2K varnish coating.
7. The environment-friendly process for high fixation paint plus 2K varnish coating according to any one of claims 1 to 5, characterized in that the paint film thickness of the intermediate coating spraying step is 30 to 45 μm, the paint film thickness of the high fixation paint spraying is 15 to 25 μm, and the paint film thickness of the varnish spraying is 45 to 60 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011299420.6A CN112495740A (en) | 2020-11-18 | 2020-11-18 | High-color-fixation paint and 2K varnish coating environment-friendly process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011299420.6A CN112495740A (en) | 2020-11-18 | 2020-11-18 | High-color-fixation paint and 2K varnish coating environment-friendly process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112495740A true CN112495740A (en) | 2021-03-16 |
Family
ID=74958124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011299420.6A Pending CN112495740A (en) | 2020-11-18 | 2020-11-18 | High-color-fixation paint and 2K varnish coating environment-friendly process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112495740A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116618269A (en) * | 2023-05-26 | 2023-08-22 | 中国第一汽车股份有限公司 | Automobile liquid metal color coating process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006016073U1 (en) * | 2006-10-13 | 2007-01-11 | Endlendt, Sandy | Chrome-effect paint for use especially in coating systems for painting motor vehicles, comprises a suspension of micronised aluminum pigment in organic solvent |
| CN105797943A (en) * | 2016-05-25 | 2016-07-27 | 奇瑞汽车股份有限公司 | Coating process capable of lowering VOCs |
| CN110951341A (en) * | 2019-11-24 | 2020-04-03 | 清远市浩宇化工科技有限公司 | Automobile finish composite coating capable of being rapidly cured and long in activation period and preparation method thereof |
| CN110997836A (en) * | 2017-08-09 | 2020-04-10 | 巴斯夫涂料有限公司 | Two-component (2K) varnish and method for coating a substrate with a two-component (2K) varnish having an enhanced visual appearance |
| CN111171655A (en) * | 2020-01-20 | 2020-05-19 | Ppg涂料(天津)有限公司 | Low-VOC (volatile organic compound) colored paint for automobile parts |
-
2020
- 2020-11-18 CN CN202011299420.6A patent/CN112495740A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006016073U1 (en) * | 2006-10-13 | 2007-01-11 | Endlendt, Sandy | Chrome-effect paint for use especially in coating systems for painting motor vehicles, comprises a suspension of micronised aluminum pigment in organic solvent |
| CN105797943A (en) * | 2016-05-25 | 2016-07-27 | 奇瑞汽车股份有限公司 | Coating process capable of lowering VOCs |
| CN110997836A (en) * | 2017-08-09 | 2020-04-10 | 巴斯夫涂料有限公司 | Two-component (2K) varnish and method for coating a substrate with a two-component (2K) varnish having an enhanced visual appearance |
| CN110951341A (en) * | 2019-11-24 | 2020-04-03 | 清远市浩宇化工科技有限公司 | Automobile finish composite coating capable of being rapidly cured and long in activation period and preparation method thereof |
| CN111171655A (en) * | 2020-01-20 | 2020-05-19 | Ppg涂料(天津)有限公司 | Low-VOC (volatile organic compound) colored paint for automobile parts |
Non-Patent Citations (4)
| Title |
|---|
| 李欣闻等: "《浅谈2K清漆的性能研究与应用》", 《汽车实用技术》 * |
| 林皓琪: "《汽车美容装潢工 初级》", 30 November 2004, 中国劳动社会保障出版社 * |
| 耿耀宗等: "《合成聚合物乳液制造与应用技术》", 30 June 1999, 中国轻工业出版社 * |
| 葛曷一: "《复合材料工厂工艺设计概论》", 30 April 2009, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116618269A (en) * | 2023-05-26 | 2023-08-22 | 中国第一汽车股份有限公司 | Automobile liquid metal color coating process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110922878A (en) | Water-based high-gloss two-component acrylic polyurethane coating and preparation method thereof | |
| CN103949388A (en) | Coating method of electric vehicle hub | |
| CN112495740A (en) | High-color-fixation paint and 2K varnish coating environment-friendly process | |
| CN102816487A (en) | Silver priming paint of 1K silver powder containing automobile refinishing coating and preparation method thereof | |
| CN101747818A (en) | Water-based paint for quick-drying alcohol-resistance plastics and preparation method thereof | |
| CN102010640A (en) | Environmentally-friendly water-based ultraviolet (UV) plastic primer and preparation method thereof | |
| CN102702888A (en) | Low-temperature quick-drying dual-component automotive trim paint | |
| CN103897587A (en) | Wear-resistant paint | |
| CN110093094A (en) | A kind of axle vehicle sedan-chair bottom surface unification aqueous anticorrosion paint and preparation method thereof | |
| CN105733390A (en) | Water-based two-component transparent finish paint for PP plastic and preparation method of finish paint | |
| CN109233541A (en) | A kind of aqueous steel drum chromatography baking vanish and preparation method and spraying method | |
| CN107189550A (en) | Inkjet printing vanadium dioxide water-based ink and its preparation method and application | |
| US20200368769A1 (en) | Method for spraying insulating mixed paint | |
| CN103497664A (en) | Environment-friendly water clear automobile original factory paint and preparation method thereof | |
| CN103122199A (en) | Ultra-low-temperature curing dual-component powder coating and preparation method thereof | |
| CN113563750B (en) | Bi-component water-based anticorrosive paint and preparation method and application thereof | |
| CN116376392A (en) | Metal material coating and preparation method and application thereof | |
| CN112126333B (en) | Water-based quick-drying easy-to-construct automobile repair varnish and preparation method thereof | |
| CN112694820A (en) | Preparation method of ultrafast-drying aqueous double-component acrylic acid refinishing paint | |
| CN115521673A (en) | Environment-friendly exterior wall texture coating not prone to blooming during spraying and preparation method thereof | |
| CN111647343A (en) | Production formula and preparation process of environment-friendly truck spray paint | |
| CN112871611A (en) | Matte coating process of water-based varnish for resin-based carbon fiber composite material and application of water-based varnish | |
| CN207913979U (en) | A kind of rapid hardening water-repellent paint spray equipment | |
| CN209338445U (en) | A kind of wear-resisting water-proof plate | |
| CN110724457A (en) | Formula and preparation method of scratch-resistant finish paint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |