CN114074063A - Method for coating metal surface with multi-component aqueous composition - Google Patents
Method for coating metal surface with multi-component aqueous composition Download PDFInfo
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- CN114074063A CN114074063A CN202111385135.0A CN202111385135A CN114074063A CN 114074063 A CN114074063 A CN 114074063A CN 202111385135 A CN202111385135 A CN 202111385135A CN 114074063 A CN114074063 A CN 114074063A
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- 238000000576 coating method Methods 0.000 title claims abstract description 168
- 239000011248 coating agent Substances 0.000 title claims abstract description 163
- 239000000203 mixture Substances 0.000 title claims abstract description 132
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 60
- 239000002184 metal Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 45
- 150000001875 compounds Chemical class 0.000 claims abstract description 42
- -1 polysiloxane Polymers 0.000 claims abstract description 31
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 17
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000077 silane Inorganic materials 0.000 claims abstract description 14
- 239000000178 monomer Substances 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 3
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 94
- 239000003973 paint Substances 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 26
- 238000009833 condensation Methods 0.000 claims description 21
- 230000005494 condensation Effects 0.000 claims description 21
- 238000007865 diluting Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 150000001768 cations Chemical class 0.000 claims description 16
- 238000007761 roller coating Methods 0.000 claims description 14
- 238000007790 scraping Methods 0.000 claims description 14
- 150000004756 silanes Chemical class 0.000 claims description 14
- 150000004819 silanols Chemical class 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 238000010790 dilution Methods 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 8
- 229920001400 block copolymer Polymers 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 229910052735 hafnium Inorganic materials 0.000 claims description 8
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 8
- 150000002602 lanthanoids Chemical class 0.000 claims description 8
- 150000002739 metals Chemical class 0.000 claims description 8
- 150000002894 organic compounds Chemical class 0.000 claims description 8
- 230000000737 periodic effect Effects 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- 229910052726 zirconium Inorganic materials 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 239000012459 cleaning agent Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 8
- 238000004070 electrodeposition Methods 0.000 abstract description 6
- JBMRMLLHFBHFDV-UHFFFAOYSA-N [Ni].[Mn].[Zn] Chemical compound [Ni].[Mn].[Zn] JBMRMLLHFBHFDV-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001010 compromised effect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
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- 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
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-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
- B05D7/24—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 for applying particular liquids or other fluent materials
-
- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- B05D2518/10—Silicon-containing 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
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
- B05D2518/12—Ceramic precursors (polysiloxanes, polysilazanes)
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to the technical field of multi-component aqueous compositions and discloses a method for coating a metal surface with a multi-component aqueous composition, the composition comprising silane, silanol, siloxane and polysiloxane; wherein at least one of these compounds is still condensable and at least one of the corresponding compounds contains at least one monomer selected from the group consisting of monomers. The method for coating metal surfaces with multi-component aqueous compositions is used by means of a process flow from pretreatment to electrocoating, in which a high-quality coating of silane-based pretreatment and electrocoating, which is as free from interference as possible, can be applied to the vehicle body in the mass production of a motor vehicle, by means of which the coating has as environmentally friendly a chemical composition as possible and ensures high corrosion protection, and the coating quality of the pretreatment coating and the electrocoating, as achieved with a high-quality corrosion-protection coating in a zinc-manganese-nickel phosphating, is not compromised.
Description
Technical Field
The invention relates to the technical field of multi-component aqueous compositions, in particular to a method for coating a metal surface by using a multi-component aqueous composition.
Background
The multi-component water-based composition is generally called as water-based paint and is suitable for metal antirust coating of household appliances, refrigerators, washing machines, air conditioner steel panels and the like.
According to the patent No. CN201811300120.8, a water-based coating method of powder coating is disclosed, the powder coating and water are added with 0.5-3% of defoaming agent according to the mass ratio of 1 (0.6-1), grinding and stirring are carried out uniformly, the coating is coated on a test plate through a coating machine, solidification is carried out at a step temperature, the water-based coating of the powder coating is completed after cooling to room temperature, but the wave mark flatness generated on the surface of the water-based coating before solidification is easy to be low through air blowing solidification and air flow, and the coating effect is influenced, according to the patent No. CN201810928940.5, a water-based coating spraying process and application thereof are disclosed, including spraying primer on the surface of a dry workpiece; carrying out flash drying operation on the primer sprayed on the surface of the workpiece; spraying finish paint on the surface of the workpiece sprayed with the primer; and curing the primer and the finish paint sprayed on the workpiece. Wherein the primer and the finish paint are water-based paints; the flash drying operation temperature is 50-80 ℃, but the electrostatic spraying is easy to cause the paint and the surface to be coated to be stained with dust, the sprayed paint structure is affected, and the stability is low, according to the patent number CN96104867.0, a formula and a process method of the brocade water-based paint are disclosed, 0.7kg of polyvinyl alcohol is added into 8kg of water for heating, the filtering is carried out after the polyvinyl alcohol is completely dissolved, a film forming auxiliary agent is added, titanium pigment, light calcium powder, talcum powder and the like are added for grinding to obtain a finished product, although the manufacturing process is simple, the natural curing efficiency at room temperature is low, and the working requirement of the process quality control method of the paint can not be met, the process quality control method of the water-based household appliance color steel primer paint can not be provided, the working requirement of the multi-component water-based composition for coating the metal surface can not be met, and the method for coating the metal surface by the multi-component water-based composition is provided.
Disclosure of Invention
Technical problem to be solved
In view of the deficiencies of the prior art, the present invention provides a method for coating a metal surface with a multi-component aqueous composition that solves the technical problems set forth in the background above.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a method of coating a metal surface with a multi-component aqueous composition, comprising the steps of:
mixing a composition comprising a silane, a silanol, a siloxane and a polysiloxane;
wherein at least one of these compounds is still condensable and at least one of the corresponding compounds comprises at least one organic compound selected from monomers, oligomers, polymers, copolymers and block copolymers;
fully shaking or stirring the composition uniformly, filtering the composition, and improving the throwing power of the electrophoretic paint coating by coating the metal surface with the composition;
wherein a newly applied coating with such a composition is rinsed at least once with water;
wherein the electrophoretic paint coating is applied after rinsing with water until there is no strong condensation rinse.
Preferably, the at least one compound containing titanium, hafnium and zirconium is selected from at least one type of cation of the first to third and fifth to eighth transition groups of the periodic table of the elements, including the lanthanides, and the cations of metals of the second main group.
Preferably, the at least one water rinse has a surfactant content and the substrate is treated at least once with an iron-containing aqueous composition prior to silane-based pretreatment.
Preferably, the newly applied coating with such a composition is not completely dried, and at least one condensable compound is used until the pre-treatment coating is rinsed with water to stop condensation.
Preferably, the composition contains, in addition to water and optionally at least one organic solvent or at least one substance influencing the pH, at least one compound from the group of silanes, silanols, siloxanes and polysiloxanes.
Preferably, the coating is constructed by adopting a roller coating method when the coating is on line, a proper amount of water is added for diluting, excessive water is not added, the water is used for diluting, the acid bias is avoided, the principle of a small amount of times of dilution is followed, and the roller coating oil output linear speed when the coating is on line is as follows: 60-100 m/min, scraping with a wire bar scraper, raw paint or scraping after adding 0-5% deionized water for dilution when coating in a laboratory, and controlling the viscosity of the water-based paint to be 4 cups/35-60 seconds if coating on a line.
Preferably, each coating and the final coating are subjected to dry film thickness detection by an electronic dry film thickness meter, and when the film thickness is insufficient, the coating needs to be supplemented to the specified dry film thickness, wherein the dry film thickness is 5-8 μm, and the wet film thickness is 10-15 μm.
Preferably, after the condensation of the pretreatment coating is stopped, the coating is dried by using a baking plate, wherein the temperature of the baking plate ranges from 216 ℃ to 224 ℃ in 30 seconds, the temperature of the baking plate ranges from 224 ℃ to 232 ℃ in 25 seconds, the temperature of the baking furnace ranges from 180 ℃ to 350 ℃ in 30 seconds, and the temperature of the baking furnace ranges from 180 ℃ to 350 ℃ in 25 seconds.
Preferably, the surface to be coated is cleaned by using an oil removal agent or a cleaning agent before use, so as to remove wax, oil stains and dust impurities on the surface to be coated.
Preferably, in order to quantitatively match and uniformly mix the composition, each composition can be packaged in a mixing bag in proportion during production and processing, and the mixing bag is provided with a liquid outlet, a main containing bag and a plurality of auxiliary containing bags; the composition is respectively arranged in the main containing bag and the auxiliary containing bag according to the proportion, the liquid outlet, the main containing bag and the auxiliary containing bag are mutually independent, and the liquid outlet and the auxiliary containing bag are communicated with the main containing bag after the mixing bag is forcibly extruded.
(III) advantageous effects
Compared with the prior art, the invention provides a method for coating a metal surface by using a multi-component aqueous composition, which has the following beneficial effects:
the method for coating metal surfaces with multi-component aqueous compositions is also suitable in multi-metallic applications, for example, by the coating having a chemical composition which is as environmentally friendly as possible and ensuring high corrosion protection: in the treatment or pretreatment of steel and zinc-rich metal surfaces and optionally aluminum-rich metal surfaces in the same bath, a process sequence from pretreatment to electrocoating, in which high-quality coatings of silane-based pretreatment and electrocoating, which are as free as possible from interference, can be applied to vehicle bodies in the mass production of automobiles, and furthermore a method using silane-based aqueous compositions, which can be carried out in existing facilities in the automobile industry and is particularly suitable for coating vehicle bodies in automotive engineering, is to be carried out in order to achieve a coating quality of the pretreatment coating and electrocoating on the vehicle body surfaces as achieved with a high-quality anticorrosion coating in a zinc-manganese-nickel phosphating, so that the quality standards are not compromised.
Drawings
FIG. 1 is a schematic view of a simple process for preparing the present invention;
FIG. 2 is a graph showing experimental data for mixing conditions of an aqueous composition according to the present invention;
FIG. 3 is a graph showing experimental data of boiling resistance, gloss and impact resistance of a coated film after drying at different temperature and time after coating with the aqueous composition of the present invention;
FIG. 4 is a mixing bag for quantitatively packaging an aqueous composition in accordance with the present invention.
In the figure: 1 mixing bag, 2 liquid discharging ports, 3 main containing bags and 4 auxiliary containing bags.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the present invention provides a technical solution, a method for coating a metal surface with a multi-component aqueous composition, specifically comprising the following steps:
s110, a mixed composition comprising silanes, silanols, siloxanes and polysiloxanes, wherein this composition comprises, in addition to water and optionally at least one organic solvent or and at least one substance affecting the pH, at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes, at least one type of cation selected from the group consisting of compounds of titanium, hafnium and zirconium of the first to third and fifth to eighth subgroups of the periodic Table of the elements, including the lanthanides, and cations of metals of the second main group;
s120, wherein at least one of these compounds is still condensable, and at least one corresponding compound comprises at least one organic compound selected from the group consisting of monomers, oligomers, polymers, copolymers, and block copolymers, at least one water rinse having a surfactant content, the substrate being treated at least once with an iron-containing aqueous composition prior to the silane-based pretreatment;
s130, fully shaking or uniformly stirring the composition, filtering the composition, improving the throwing power of the electrophoretic paint coating by coating the metal surface with the composition, cleaning the surface to be coated by using an ultrasonic cleaner before use, and removing wax, oil stains and dust impurities on the surface to be coated;
s140, wherein the newly applied coating with the composition is rinsed with water at least once, the newly applied coating with the composition is not completely dried, and at least one condensable compound is used until the rinsing with water of the pretreatment coating stops condensing;
s150, after washing with water, applying an electrophoretic paint coating until no strong condensation washing exists, constructing by adopting a roller coating method when coating is on line, adding a proper amount of water for diluting, adding no excessive water, diluting with water to avoid acid bias, following the principle of a small amount of times when diluting, and roller coating oil yield and linear speed when coating is on line are as follows: 60-100 m/min, scraping with a wire bar scraper, raw paint or scraping after 0-5% deionized water is added for dilution during laboratory coating, controlling the viscosity of the water-based paint to be 4 cups/35-60 s if the water-based paint is coated on line, detecting the dry film thickness of each coating and the final coating by using an electronic dry film thickness meter, supplementing the coating to the specified dry film thickness when the film thickness is insufficient, wherein the dry film thickness is 5-8 μm, the wet film is 10-15 μm, drying the coating by using a baking plate after the condensation of the pre-treated coating is stopped, wherein the plate temperature is 219 ℃ during 30 s, 224 ℃ during 25 s, 320 ℃ during 30 s, 340 ℃ during 25 s, and the experimental data are shown in fig. 2 and fig. 3.
Example two
As shown in fig. 1, the present invention provides a technical solution, a method for coating a metal surface with a multi-component aqueous composition, specifically comprising the following steps:
s110, a mixed composition comprising silanes, silanols, siloxanes and polysiloxanes, wherein this composition comprises, in addition to water and optionally at least one organic solvent or and at least one substance affecting the pH, at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes, at least one type of cation selected from the group consisting of compounds of titanium, hafnium and zirconium of the first to third and fifth to eighth subgroups of the periodic Table of the elements, including the lanthanides, and cations of metals of the second main group;
s120, wherein at least one of these compounds is still condensable, and at least one corresponding compound comprises at least one organic compound selected from the group consisting of monomers, oligomers, polymers, copolymers, and block copolymers, at least one water rinse having a surfactant content, the substrate being treated at least once with an iron-containing aqueous composition prior to the silane-based pretreatment;
s130, fully shaking or uniformly stirring the composition, filtering the composition by using an automatic vibrating screen, coating the metal surface with the composition to improve the throwing power of the electrophoretic paint coating, cleaning the surface to be coated by using a surfactant before use, and removing wax, oil stains and dust impurities on the surface to be coated;
s140, wherein the newly applied coating with the composition is rinsed with water at least once, the newly applied coating with the composition is not completely dried, and at least one condensable compound is used until the rinsing with water of the pretreatment coating stops condensing;
s150, after washing with water, applying an electrophoretic paint coating until no strong condensation washing exists, constructing by adopting a roller coating method when coating is on line, adding a proper amount of water for diluting, adding no excessive water, diluting with water to avoid acid bias, following the principle of a small amount of times when diluting, and roller coating oil yield and linear speed when coating is on line are as follows: 60-100 m/min, scraping with a wire bar scraper, raw paint or scraping after 0-5% deionized water is added for dilution during laboratory coating, controlling the viscosity of the water-based paint to be 4 cups/35-60 s if the water-based paint is coated on line, detecting the dry film thickness of each coating and the final coating by using an electronic dry film thickness meter, supplementing the coating to the specified dry film thickness according to the requirement when the film thickness is insufficient, wherein the dry film thickness is 6 mu m, the wet film is 13 mu m, drying the coating by using a baking plate after the condensation of the pretreatment coating is stopped, the plate temperature is 216 ℃ during baking, the plate temperature is 232 ℃ during 25 s, the furnace temperature is 300 ℃ during 30 s, the furnace temperature is 340 ℃ during 25 s, and the experimental data are shown in figure 2 and figure 3.
EXAMPLE III
As shown in fig. 1, the present invention provides a technical solution, a method for coating a metal surface with a multi-component aqueous composition, specifically comprising the following steps:
s110, a mixed composition comprising silanes, silanols, siloxanes and polysiloxanes, wherein this composition comprises, in addition to water and optionally at least one organic solvent or and at least one substance affecting the pH, at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes, at least one type of cation selected from the group consisting of compounds of titanium, hafnium and zirconium of the first to third and fifth to eighth subgroups of the periodic Table of the elements, including the lanthanides, and cations of metals of the second main group;
s120, wherein at least one of these compounds is still condensable, and at least one corresponding compound comprises at least one organic compound selected from the group consisting of monomers, oligomers, polymers, copolymers, and block copolymers, at least one water rinse having a surfactant content, the substrate being treated at least once with an iron-containing aqueous composition prior to the silane-based pretreatment;
s130, fully shaking or uniformly stirring the composition, filtering the composition by using a 300-mesh filter screen, coating the metal surface with the composition to improve the throwing power of the electrophoretic paint coating, and performing electroplating degreasing cleaning on the surface to be coated by using an electroplating machine before use to remove wax, oil stains and dust impurities on the surface to be coated;
s140, wherein the newly applied coating with the composition is rinsed with water at least once, the newly applied coating with the composition is not completely dried, and at least one condensable compound is used until the rinsing with water of the pretreatment coating stops condensing;
s150, after washing with water, applying an electrophoretic paint coating until no strong condensation washing exists, constructing by adopting a roller coating method when coating is on line, adding a proper amount of water for diluting, adding no excessive water, diluting with water to avoid acid bias, following the principle of a small amount of times when diluting, and roller coating oil yield and linear speed when coating is on line are as follows: 60-100 m/min, scraping with a wire bar scraper, raw paint or scraping after 0-5% deionized water is added for dilution during laboratory coating, controlling the viscosity of the water-based paint to be 4 cups/35-60 s if the water-based paint is coated on line, detecting the dry film thickness of each coating and the final coating by using an electronic dry film thickness meter, supplementing the coating to the specified dry film thickness when the film thickness is insufficient, wherein the dry film thickness is 5 mu m, the wet film is 12 mu m, drying the coating by using a baking plate after the condensation of the pretreated coating is stopped, controlling the plate temperature to be 224 ℃ during baking at 30 s, the plate temperature to be 225 ℃ during 25 s, the furnace temperature to be 270 ℃ during 30 s and the furnace temperature to be 335 ℃ during 25 s, and experimental data are shown in figures 2 and 3.
Example four
As shown in fig. 1, the present invention provides a technical solution, a method for coating a metal surface with a multi-component aqueous composition, specifically comprising the following steps:
s110, a mixed composition comprising silanes, silanols, siloxanes and polysiloxanes, wherein this composition comprises, in addition to water and optionally at least one organic solvent or and at least one substance affecting the pH, at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes, at least one type of cation selected from the group consisting of compounds of titanium, hafnium and zirconium of the first to third and fifth to eighth subgroups of the periodic Table of the elements, including the lanthanides, and cations of metals of the second main group;
s120, wherein at least one of these compounds is still condensable, and at least one corresponding compound comprises at least one organic compound selected from the group consisting of monomers, oligomers, polymers, copolymers, and block copolymers, at least two water rinses using a rinse machine having a surfactant content, the substrate being treated at least once with an iron-containing aqueous composition prior to silane-based pretreatment;
s130, fully shaking or uniformly stirring the composition, filtering the composition by using a 300-mesh filter screen, coating the metal surface with the composition to improve the throwing power of the electrophoretic paint coating, cleaning the surface to be coated by using a sodium hydroxide alkaline builder before use, and removing wax, oil stains and dust impurities on the surface to be coated;
s140, wherein the newly applied coating with the composition is rinsed with water at least once, the newly applied coating with the composition is not completely dried, and at least one condensable compound is used until the rinsing with water of the pretreatment coating stops condensing;
s150, after washing with water, applying an electrophoretic paint coating until no strong condensation washing exists, constructing by adopting a roller coating method when coating is on line, adding a proper amount of water for diluting, adding no excessive water, diluting with water to avoid acid bias, following the principle of a small amount of times when diluting, and roller coating oil yield and linear speed when coating is on line are as follows: 60-100 m/min, scraping with a wire bar scraper, original paint or scraping after 0-5% deionized water is added for dilution during laboratory coating, controlling the viscosity of the water-based paint to be 4 cups/35-60 s if the water-based paint is coated on line, detecting the dry film thickness of each coating and the final coating by using an electronic dry film thickness meter, supplementing the coating to the specified dry film thickness when the film thickness is insufficient, wherein the dry film thickness is 5 mu m, the wet film is 12 mu m, drying the coating by using a baking plate after the condensation of the pretreated coating is stopped, controlling the plate temperature to be 220 ℃ during the baking to be 230 ℃ during 25 s, controlling the furnace temperature to be 290 ℃ during 30 s and the furnace temperature to be 350 ℃ during 25 s, and experimental data are shown in figures 2 and 3.
EXAMPLE five
As shown in fig. 1, the present invention provides a technical solution, a method for coating a metal surface with a multi-component aqueous composition, specifically comprising the following steps:
s110, a mixed composition comprising silanes, silanols, siloxanes and polysiloxanes, wherein this composition comprises, in addition to water and optionally at least one organic solvent or and at least one substance affecting the pH, at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes, at least one type of cation selected from the group consisting of compounds of titanium, hafnium and zirconium of the first to third and fifth to eighth subgroups of the periodic Table of the elements, including the lanthanides, and cations of metals of the second main group;
s120, wherein at least one of these compounds is still condensable, and at least one corresponding compound comprises at least one organic compound selected from the group consisting of monomers, oligomers, polymers, copolymers, and block copolymers, at least two water rinses using a rinse machine having a surfactant content, the substrate being treated at least once with an iron-containing aqueous composition prior to silane-based pretreatment;
s130, fully shaking or uniformly stirring the composition by using an automatic shaking machine, filtering the composition by using a 300-mesh filter screen, coating the metal surface with the composition to improve the throwing power of the electrophoretic paint coating, cleaning the surface to be coated by using an alkylphenol ethoxylate builder before use, and removing wax, oil stains and dust impurities on the surface to be coated;
s140, wherein the newly applied coating with the composition is rinsed with water at least once, the newly applied coating with the composition is not completely dried, and at least one condensable compound is used until the rinsing with water of the pretreatment coating stops condensing;
s150, after washing with water, applying an electrophoretic paint coating until no strong condensation washing exists, constructing by adopting a roller coating method when coating is on line, adding a proper amount of water for diluting, adding no excessive water, diluting with water to avoid acid bias, following the principle of a small amount of times when diluting, and roller coating oil yield and linear speed when coating is on line are as follows: 60-100 m/min, scraping with a wire bar scraper, original paint or scraping after 0-5% deionized water is added for dilution during laboratory coating, controlling the viscosity of the water-based paint to be 4 cups/35-60 s if the water-based paint is coated on line, detecting the dry film thickness of each coating and the final coating by using an electronic dry film thickness meter, supplementing the coating to the specified dry film thickness when the film thickness is insufficient, wherein the dry film thickness is 5 mu m, the wet film is 12 mu m, drying the coating by using a baking plate after the condensation of the pretreated coating is stopped, controlling the plate temperature to be 220 ℃ during the baking to be 230 ℃ during 25 s, controlling the furnace temperature to be 290 ℃ during 30 s and the furnace temperature to be 350 ℃ during 25 s, and experimental data are shown in figures 2 and 3.
The working principle of the device is as follows: the aqueous coating is first worked up by using materials which do not react with water (such as stainless steel, plastics, etc.) or by suitable undercoating, with application being strictly prohibited by mixing with other coatings and organic solvents to prevent deterioration, and then by mixing compositions comprising silanes, silanols, siloxanes and polysiloxanes, wherein at least one compound comprising titanium, hafnium and zirconium is selected from at least one type of cation of the cations of metals of the first to third and fifth to eighth subgroups of the periodic table of the elements, including the lanthanides, and of the second main group, wherein at least one of these compounds is still condensable, and at least one corresponding compound comprises at least one organic compound selected from monomers, oligomers, polymers, copolymers and block copolymers, wherein in addition to water and optionally at least one organic solvent or and at least one substance affecting the pH, the composition further comprises at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes, the composition is shaken or stirred thoroughly, the composition is filtered, the throwing power of the electrophoretic paint coating is improved by coating the metal surface with the composition, the surface to be painted is cleaned with a degreasing agent or a cleaning agent to remove wax, oil and dirt debris from the surface to be painted when the coating of the metal surface is performed, wherein a newly applied coating with the composition is rinsed at least once with water, at least one rinse with water having a surfactant content, the substrate is treated at least once with an iron-containing aqueous composition prior to the silane-based pretreatment, wherein the electrophoretic paint coating is applied after the rinse with water until no intensive condensation rinse, the newly applied coating of the composition is not completely dried, at least one condensable compound is used until the rinse of the pretreatment coating with water ceases to condense, after the condensation of the pretreated coating is stopped, drying the coating by using a baking plate, wherein the temperature range of the baking plate is 216-224 ℃ in 30 seconds, 224-232 ℃ in 25 seconds, 180-350 ℃ in 30 seconds and 180-350 ℃ in 25 seconds, the thickness of a dry film of each coating and the final coating needs to be detected by using an electronic dry film thickness meter, and when the thickness of the film is insufficient, the film needs to be coated to the specified thickness of the dry film, the thickness of the dry film is 5-8 mu m, and the wet film is 10-15 mu m.
Further, in order to facilitate a user to mix the composition and avoid mixing ratio and component errors, the mixing bag 1 can be made according to different proportions according to the user's needs, and the mixing bag 1 is provided with a liquid outlet 2, a main containing bag 3 and a plurality of auxiliary containing bags 4; the composition is respectively arranged in the main containing bag 3 and the auxiliary containing bag 4 according to the proportion, the liquid outlet 2, the main containing bag 3 and the auxiliary containing bag 4 are mutually independent, and the liquid outlet 2 and the auxiliary containing bag 4 can be communicated with the main containing bag 3 after the mixing bag 1 is forcibly extruded.
The working principle is as follows: the main containing bag 3 is used for containing a composition with a larger proportion, the other auxiliary containing bags 4 are used for containing and mixing a composition with a smaller proportion, when the composite is used, the auxiliary containing bags 4 are pressed forcibly to enable the composition in the auxiliary containing bags 4 to enter the main containing bag 3 for mixing, the mixing bag 1 is repeatedly kneaded to enable the composition in the main containing bag 3 and the auxiliary containing bags 4 to be fully mixed, the use steps of a user can be reduced by packaging and mixing the mixing bag 1, the operation is simpler, the proportion and the components of the mixed composition in each mixing bag 1 can be ensured to be consistent, pollution caused by exposure and mixing is avoided, the mixed composition can be poured into an equipment container for a metal surface coating process after a liquid discharge port 2 is opened, and the user can be forced to carry out batching and filling of the mixed composition for a plurality of times by a small amount through the mixing bags 1, so that the cost is reduced, compared with barreling, the mode of the mixing bag 1 is more convenient to transport and store, the product can be taken and used at any time, and the production cost is reduced.
Further, in order to avoid the situation that the composition coated on the metal surface has too large thickness, which leads to too long drying time or tears due to too large difference of internal and external stresses during condensation, the thickness of the coated composition needs to be controlled, and the coating process can be controlled by the formula:
calculating the time t required by coating the metal surface; where L is the total length of the metal surface, i.e. the total displacement of the roller in relation to the movement of the metal surface; v is the moving speed of the metal surface and the speed of the roller relative to the metal surface;
then, since the roller brushes the composition flat against the metal surface by reciprocating movement while the composition is being applied, a cumulative thickness of the composition occurs, which can be represented by the formula:
wherein T (x) is the cumulative thickness of the composition; v is the moving speed of the metal surface and the speed of the roller relative to the metal surface; t is the time required to coat the metal surface; w is the length of the roller; d is the width of the roller;
the maximum cumulative thickness T of the composition can then be calculated:
wherein Q1Is the amount of composition applied to the metal surface; then converting the formula T (x) into beta by finite element softwareThe distribution model is expressed, and the formula can be obtained:
will calculate the obtained T111The formula for the cumulative thickness of the composition can be derived by substituting the above formula in combination with the composition's adhesion rate:
wherein
The adhesion rate of the composition on the metal surface; q is the amount of composition released from the roller; wherein the adhesion rate can be represented by the formula:
and (4) performing representation.
The working principle and the beneficial effects are as follows: the release amount, the speed and the like of the composition of the processing system are controlled through a formula, so that the composition can be ensured to be consistent in thickness when being coated on the metal surface, and therefore condensation can be synchronously performed in the drying process, and the phenomena of tearing and the like caused by inconsistent internal stress during condensation due to inconsistent coating amount can be avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method of coating a metal surface with a multi-component aqueous composition, characterized by: the method specifically comprises the following steps:
s110, mixing a composition, wherein the composition contains silane, silanol, siloxane and polysiloxane;
s120, wherein at least one of these compounds is still condensable, and at least one of the corresponding compounds comprises at least one organic compound selected from monomers, oligomers, polymers, copolymers, and block copolymers;
s130, fully shaking up or uniformly stirring the composition, filtering the composition, and improving the throwing power of the electrophoretic paint coating by coating the metal surface with the composition;
s140, wherein a newly applied coating with this composition is rinsed with water at least once;
s150, wherein the electrophoretic paint coating is applied after rinsing with water until there is no strong condensation rinse.
2. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: the at least one compound containing titanium, hafnium and zirconium is chosen from at least one type of cation of the first to third and fifth to eighth subgroups of the periodic table of elements, including the lanthanides, and the cations of the metals of the second main group.
3. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: the at least one water rinse has a surfactant content and the substrate is treated at least once with an aqueous composition comprising iron prior to silane-based pretreatment.
4. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: the newly applied coating with this composition does not dry completely and at least one condensable compound is used until the pre-treatment coating is rinsed with water to stop the condensation.
5. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: said composition comprising, in addition to water and optionally at least one organic solvent or at least one substance influencing the pH value, at least one compound selected from the group consisting of silanes, silanols, siloxanes and polysiloxanes.
6. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: the coating is constructed by adopting a roller coating method during online coating, proper water is added for diluting, excessive water is not added, water is used for diluting, acid bias is avoided, the principle of a small amount of times of dilution is followed, and the roller coating oil output linear speed during online coating is as follows: 60-100 m/min, scraping with a wire bar scraper, raw paint or scraping after adding 0-5% deionized water for dilution when coating in a laboratory, and controlling the viscosity of the water-based paint to be 4 cups/35-60 seconds if coating on a line.
7. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: and each coating and the final coating need to be subjected to dry film thickness detection by using an electronic dry film thickness meter, and when the film thickness is insufficient, the coating needs to be supplemented to the specified dry film thickness, wherein the dry film thickness is 5-8 mu m, and the wet film thickness is 10-15 mu m.
8. A method according to claim 4 for coating a metal surface with a multi-component aqueous composition, characterized in that: and after the condensation of the pretreatment coating is stopped, drying the coating by using a baking plate, wherein the temperature range of the baking plate is 216-224 ℃ in 30 seconds, the temperature range of the baking plate is 224-232 ℃ in 25 seconds, the temperature range of the baking furnace is 180-350 ℃ in 30 seconds, and the temperature range of the baking furnace is 180-350 ℃ in 25 seconds.
9. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: before the paint is used, the surface to be coated is cleaned by using an oil removal agent or a cleaning agent, and wax, oil stains and dust impurities on the surface to be coated are removed.
10. A method according to claim 1 for coating a metal surface with a multi-component aqueous composition, characterized in that: in order to quantitatively proportion and uniformly mix the composition, the compositions can be packaged in a mixing bag (1) in proportion during production and processing, and a liquid outlet (2), a main containing bag (3) and a plurality of auxiliary containing bags (4) are arranged on the mixing bag (1); the composition is respectively arranged in the main containing bag (3) and the auxiliary containing bag (4) according to the proportion, the liquid outlet (2), the main containing bag (3) and the auxiliary containing bag (4) are mutually independent, and the liquid outlet (2) and the auxiliary containing bag (4) are communicated with the main containing bag (3) after the mixing bag (1) is forcibly extruded.
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| CN104271799A (en) * | 2011-10-24 | 2015-01-07 | 凯密特尔有限责任公司 | Method for coating metallic surfaces with a multi-component aqueous composition |
| JP2019048646A (en) * | 2017-09-07 | 2019-03-28 | 株式会社悠心 | Multiple liquid filling bag |
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| CN1335047A (en) * | 1998-12-15 | 2002-02-06 | 帕克-汉尼芬有限公司 | Method of applying phase change thermal interface material |
| CN101003041A (en) * | 2006-01-19 | 2007-07-25 | 东京毅力科创株式会社 | Application method, applicator and processing procedure |
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