CN111659593A - Preparation process of ultraviolet-resistant super-weather-resistant coating aluminum foil - Google Patents

Preparation process of ultraviolet-resistant super-weather-resistant coating aluminum foil Download PDF

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Publication number
CN111659593A
CN111659593A CN202010513614.5A CN202010513614A CN111659593A CN 111659593 A CN111659593 A CN 111659593A CN 202010513614 A CN202010513614 A CN 202010513614A CN 111659593 A CN111659593 A CN 111659593A
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aluminum foil
parts
coating
stirring
ultraviolet
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CN202010513614.5A
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Chinese (zh)
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张君
钱本强
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Jiangsu Wanyuan New Materials Co ltd
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Jiangsu Wanyuan New Materials Co ltd
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Priority to CN202010513614.5A priority Critical patent/CN111659593A/en
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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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B01F27/11251—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis having holes in the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B01F27/1921—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements comprising helical elements and paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/04—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a surface receptive to ink or other liquid
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • 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
    • B05D7/58—No clear coat specified
    • B05D7/586—No clear coat specified each layer being cured, at least partially, separately
    • 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
    • C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • 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
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • 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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    • 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
    • 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
    • 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
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • 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
    • B05D2504/00—Epoxy polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
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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
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2272—Ferric oxide (Fe2O3)
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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

Abstract

The invention discloses a preparation process of an ultraviolet-resistant super-weather-resistant coating aluminum foil, which greatly improves the performance of the aluminum foil by coating an ultraviolet-resistant coating, a weather-resistant coating and a hydrophilic coating on the surface of the aluminum foil; the aluminum foil has excellent ultraviolet resistance through the ultraviolet resistant coating, cannot be aged due to ultraviolet irradiation, and is suitable for outdoor application; the aluminum foil can adapt to various climatic changes through the weather-resistant coating, is not easy to peel off and has no cracks, and the service life of the aluminum foil is prolonged; the hydrophilic coating can make the aluminum foil have a hydrophilic effect during heat exchange, accelerate the diffusion of the condensed water on the surface of the aluminum foil and accelerate the heat exchange process. Through at internal first agitator, second agitator, the third agitator of setting of cauldron, improve stirring effect and stirring efficiency to further improve the preparation efficiency of coating.

Description

Preparation process of ultraviolet-resistant super-weather-resistant coating aluminum foil
Technical Field
The invention relates to the technical field of aluminum foil manufacturing, in particular to a preparation process of an ultraviolet-resistant super-weather-resistant coating aluminum foil.
Background
The heat exchanger is a device for transferring part of heat of hot fluid to cold fluid, and is also called a heat exchanger. The heat exchanger plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production and is widely applied.
The aluminum foil fin for the heat exchanger performs conversion between heat emission and heat absorption during operation. The existing aluminum foil is generally coated by a water-based acrylic acid material, but the aluminum foil of a water-based anticorrosive layer can not meet the use requirements of special environments, such as desert regions, marine environments, chemical industry and the like, and is tested by strong ultraviolet radiation and extreme climate. In order to solve the problems of ultraviolet resistance and weather resistance in special environments, the invention improves the aluminum foil coating.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a preparation process of an anti-ultraviolet super-weather-resistant coating aluminum foil.
The technical scheme for solving the problems comprises the following steps: a preparation process of an anti-ultraviolet super-weather-resistant coating aluminum foil comprises the following steps;
step 1-preparation of hydrophilic coating:
(1) weighing the following raw materials: 30-45 parts of water-based acrylic acid, 5-10 parts of ethanolamine and 45-65 parts of ethylene glycol monobutyl ether;
(2) putting the weighed raw materials into a first reaction kettle for fully stirring to obtain a hydrophilic coating;
step 2-preparation of a weather-resistant coating:
(1) weighing the following raw materials: 10-20 parts of epoxy resin, 10-20 parts of polybutadiene resin, 20-35 parts of tartaric acid, 5-10 parts of polyacrylamide and 15-55 parts of propylene glycol methyl acetate;
(2) putting the weighed raw materials into a second reaction kettle for fully stirring to obtain a weather-resistant coating;
step 3-preparation of an ultraviolet-resistant coating:
(1) weighing the following raw materials: 80-90 parts of bisphenol A epoxy resin, 25-35 parts of aliphatic amine curing agent, 2-7 parts of aliphatic amine accelerator, 7-17 parts of rosin, 20-35 parts of ethylene glycol, UV-465-10 parts, 4-9 parts of nano iron oxide, 10-12 parts of titanium dioxide, 1-2 parts of defoaming agent and 1-3 parts of hydrophobic agent;
(2) putting bisphenol A epoxy resin, an aliphatic amine curing agent, an aliphatic amine accelerator, rosin, ethylene glycol, UV-46, nano iron oxide and titanium dioxide into a third reaction kettle, stirring for 5-15 minutes, adding titanium dioxide, a defoaming agent and a hydrophobic agent, and stirring for 10-20 minutes to obtain an ultraviolet-resistant coating;
step 3-pretreatment of aluminum foil:
(1) degreasing treatment: placing the aluminum foil in a degreasing tank filled with a degreasing agent, wherein the degreasing agent reacts with oil stains on the surface of the aluminum foil, the temperature of the degreasing tank is kept at 20-40 ℃, the treatment time is 7-10s, and the pH is 10-13;
(2) and (3) water washing treatment: placing the aluminum foil subjected to degreasing treatment in a degreasing solution cleaning tank for cleaning, placing the aluminum foil in a hot water cleaning tank for primary water cleaning, and then placing the aluminum foil in a normal-temperature water cleaning tank for secondary water cleaning;
(3) and (3) drying treatment: placing the washed aluminum foil in a drying furnace;
step 4-first coating: coating an anti-ultraviolet coating on the surface of the aluminum foil, and cooling after primary curing at the temperature of 230 ℃ and 300 ℃ for 25-30 s;
step 5-second coating: coating a weather-resistant coating on the surface of the ultraviolet-resistant coating, and cooling after secondary curing at the temperature of 230-300 ℃ for 30-35 seconds;
step 6-third coating: coating a hydrophilic coating on the surface of the weather-resistant coating, curing for the third time at the temperature of 230 ℃ and 250 ℃ for 25-30s, and cooling.
Further, the degreasing agent is an alkaline solution containing sodium ions.
Further, the temperature of the hot water cleaning tank is kept between 40 and 60 ℃.
Furthermore, squeezing rollers are arranged at the outlets of the degreasing liquid cleaning tank, the hot water cleaning tank and the normal-temperature water cleaning tank.
Further, the temperature of the drying furnace is maintained at 300-400 ℃.
Further, the defoaming agent is emulsified silicone oil; the water repellent agent is a water repellent agent 6600,
further, the first reaction kettle, the second reaction kettle and the third reaction kettle have the same structure and size;
the first reaction kettle comprises a kettle body, a motor arranged at the top of the kettle body, a stirring shaft which is rotatably arranged in the kettle body through a rolling bearing, one end of the stirring shaft extends out of the kettle body and is arranged on an output shaft of the motor, a first stirrer arranged on the stirring shaft, a second stirrer arranged on the first stirrer and a third stirrer arranged on the stirring shaft;
the first stirrer comprises a plurality of stirring rings which are arranged on the stirring shaft through a plurality of support columns and distributed along the central axis direction of the stirring shaft, fixing columns of which the upper ends and the lower ends are respectively arranged between two adjacent stirring rings and annularly arrayed around the central axis of the stirring rings, and stirring blades arranged on the fixing columns;
the second stirrer is positioned between the first stirrer and the stirring shaft, the second stirrer comprises a plurality of mixing blades which are arranged on the inner surface of the stirring ring and annularly arrayed around the central axis of the stirring ring, the mixing blades are positioned between two adjacent fixing columns, and a plurality of mixing blades which are coaxially arranged are arranged on the mixing blades, and the diameters of the mixing blades are increased along with the increase of the distance between the mixing blades and the stirring shaft;
the mixing blade is provided with a plurality of mixing holes; the mixing blade is in a circular arc structure, the mixing blade and the mixing blade are in the same plane, and the central angle subtended by the mixing blade is less than 180 degrees and greater than 90 degrees.
Further, the third stirrer is a screw type stirrer.
Furthermore, the stirring blade comprises a stirring fin A with an arc structure, and a stirring fin B with one end arranged on the stirring fin A and symmetrical to the stirring fin A.
The invention has the following beneficial effects: according to the invention, the ultraviolet-resistant coating, the weather-resistant coating and the hydrophilic coating are coated on the surface of the aluminum foil, so that the performance of the aluminum foil is greatly improved; the aluminum foil has excellent ultraviolet resistance through the ultraviolet resistant coating, cannot be aged due to ultraviolet irradiation, and is suitable for outdoor application; the aluminum foil can adapt to various climatic changes through the weather-resistant coating, is not easy to peel off and has no cracks, and the service life of the aluminum foil is prolonged; the hydrophilic coating can make the aluminum foil have a hydrophilic effect during heat exchange, accelerate the diffusion of the condensed water on the surface of the aluminum foil and accelerate the heat exchange process. Through at internal first agitator, second agitator, the third agitator of setting of cauldron, improve stirring effect and stirring efficiency to further improve the preparation efficiency of coating.
Drawings
FIG. 1 is a schematic view of the structure of a first reaction vessel of the present invention
FIG. 2 is a first schematic structural diagram of a first stirrer, a second stirrer and a third stirrer according to the present invention;
FIG. 3 is a second schematic structural diagram of the first stirrer, the second stirrer and the third stirrer according to the present invention.
In the figure: 1-kettle body, 2-motor, 3-stirring shaft, 4-first stirrer, 5-second stirrer, 6-stirring ring, 7-fixing column, 8-stirring blade, 9-mixing blade, 10-mixing sheet, 11-mixing hole, 12-stirring fin A, 13-stirring fin B, 14-third stirrer and 15-supporting column.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
A preparation process of an anti-ultraviolet super-weather-resistant coating aluminum foil comprises the following steps;
step 1-preparation of hydrophilic coating:
(1) weighing the following raw materials: 30 parts of water-based acrylic acid, 5 parts of ethanolamine and 45 parts of ethylene glycol monobutyl ether;
(2) putting the weighed raw materials into a first reaction kettle for fully stirring to obtain a hydrophilic coating;
step 2-preparation of a weather-resistant coating:
(1) weighing the following raw materials: 10 parts of epoxy resin, 10 parts of polybutadiene resin, 20 parts of tartaric acid, 5 parts of polyacrylamide and 15 parts of propylene glycol methyl acetate;
(2) putting the weighed raw materials into a second reaction kettle for fully stirring to obtain a weather-resistant coating;
step 3-preparation of an ultraviolet-resistant coating:
(1) weighing the following raw materials: 80 parts of bisphenol A epoxy resin, 25 parts of aliphatic amine curing agent, 2 parts of aliphatic amine accelerator, 7 parts of rosin, 20 parts of ethylene glycol, UV-465 parts, 4 parts of nano iron oxide, 10 parts of titanium dioxide, 1 part of emulsified silicone oil and 66001 parts of hydrophobic agent;
(2) putting bisphenol A epoxy resin, an aliphatic amine curing agent, an aliphatic amine accelerator, rosin, ethylene glycol, UV-46, nano iron oxide and titanium dioxide into a third reaction kettle, stirring for 5-15 minutes, adding titanium dioxide, a defoaming agent and a hydrophobic agent, and stirring for 10 minutes to obtain an ultraviolet-resistant coating;
step 3-pretreatment of aluminum foil:
(1) degreasing treatment: placing the aluminum foil in a degreasing tank filled with a degreasing agent, wherein the degreasing agent is an alkaline solution containing sodium ions, the degreasing agent reacts with oil stains on the surface of the aluminum foil, the temperature of the degreasing tank is kept at 20 ℃, the treatment time is 10s, and the pH value is 13;
(2) and (3) water washing treatment: placing the degreased aluminum foil in a degreasing solution cleaning tank for cleaning, placing the aluminum foil in a hot water cleaning tank for primary water cleaning, keeping the temperature of the hot water cleaning tank at 40 ℃, and then placing the aluminum foil in a normal-temperature water cleaning tank for secondary water cleaning; squeezing rollers are arranged at the outlets of the degreasing fluid cleaning tank, the hot water cleaning tank and the normal-temperature water cleaning tank;
(3) and (3) drying treatment: placing the washed aluminum foil in a drying furnace; the temperature of the drying furnace is kept at 300 ℃;
step 4-first coating: coating an anti-ultraviolet coating on the surface of the aluminum foil, and cooling after primary curing at 250 ℃ for 30 s;
step 5-second coating: coating a weather-resistant coating on the surface of the ultraviolet-resistant coating, curing for the second time at 230 ℃ for 35s, and cooling;
step 6-third coating: and (3) coating a hydrophilic coating on the surface of the weather-resistant coating, curing for the third time at 230 ℃ for 30s, and cooling.
The first reaction kettle, the second reaction kettle and the third reaction kettle have the same structure and size;
the first reaction kettle comprises a kettle body 1, a motor 2 arranged at the top of the kettle body 1, a stirring shaft 3 which is rotatably arranged in the kettle body 1 through a rolling bearing, one end of the stirring shaft extends out of the kettle body 1 and is arranged on an output shaft of the motor 2, a first stirrer 4 arranged on the stirring shaft 3, a second stirrer 5 arranged on the first stirrer 4, and a third stirrer 14 arranged on the stirring shaft 3;
the first stirrer 4 comprises a plurality of stirring rings 6 which are arranged on the stirring shaft 3 through a plurality of support columns 15 and distributed along the central axis direction of the stirring shaft 3, fixing columns 7 of which the upper ends and the lower ends are respectively arranged between two adjacent stirring rings 6 and annularly arrayed around the central axis of the stirring rings 6, and stirring blades 8 arranged on the fixing columns 7;
the second stirrer 5 is positioned between the first stirrer 4 and the stirring shaft 3, the second stirrer 5 comprises a plurality of mixing blades 9 which are arranged on the inner surface of the stirring ring 6 and are annularly arrayed around the central axis of the stirring ring 6, the mixing blades 9 are positioned between two adjacent fixing columns 7, a plurality of mixing blades 10 which are arranged on the mixing blades 9 and are coaxially arranged, and the diameter of each mixing blade 10 is increased along with the increase of the distance between each mixing blade 10 and the stirring shaft 3;
the mixing blade 9 is provided with a plurality of mixing holes 11; the mixing blade 10 is in a circular arc structure, the mixing blade 10 and the mixing blade 9 are in the same plane, and the central angle subtended by the mixing blade 10 is less than 180 degrees and greater than 90 degrees.
The third agitator 14 is a screw type agitator.
The stirring blade 8 includes a stirring fin a12 having a circular arc structure, and a stirring fin B13 having one end mounted on the stirring fin a12 and being symmetrical to the stirring fin a 12.
The stirring effect and the stirring efficiency are improved through the first reaction kettle, the second reaction kettle and the third reaction kettle, so that the efficiency of the whole preparation process is improved; the first stirrer 4 and the second stirrer 5 realize the regional stirring in the radial direction, the first stirrer 4 realizes the layered stirring and the vertical shunting in the axial direction by using the stirring blade 8, the stirring and mixing effects are improved, and the mixing blade 10 works in cooperation with the stirring blade 8, so that the layering phenomenon of materials is avoided; the second stirrer 5 generates larger shearing force through the mixing blade 9, so that materials close to the stirring shaft 3 are turbulent, and stirring is enhanced; the third stirrer 14 is used for enhancing the mixing of the upper material and the lower material, so that the axial mixing is realized, and the stirring effect is further improved.
Example 2
A preparation process of an anti-ultraviolet super-weather-resistant coating aluminum foil comprises the following steps;
step 1-preparation of hydrophilic coating:
(1) weighing the following raw materials: 38 parts of water-based acrylic acid, 8 parts of ethanolamine and 55 parts of ethylene glycol monobutyl ether;
(2) putting the weighed raw materials into a first reaction kettle for fully stirring to obtain a hydrophilic coating;
step 2-preparation of a weather-resistant coating:
(1) weighing the following raw materials: 15 parts of epoxy resin, 15 parts of polybutadiene resin, 28 parts of tartaric acid, 7 parts of polyacrylamide and 35 parts of propylene glycol methyl acetate;
(2) putting the weighed raw materials into a second reaction kettle for fully stirring to obtain a weather-resistant coating;
step 3-preparation of an ultraviolet-resistant coating:
(1) weighing the following raw materials: 85 parts of bisphenol A epoxy resin, 30 parts of aliphatic amine curing agent, 5 parts of aliphatic amine accelerator, 12 parts of rosin, 25 parts of ethylene glycol, 467 parts of UV-467 parts, 7 parts of nano iron oxide, 10 parts of titanium dioxide, 1 part of emulsified silicone oil and 66001 parts of hydrophobic agent;
(2) putting bisphenol A epoxy resin, an aliphatic amine curing agent, an aliphatic amine accelerator, rosin, ethylene glycol, UV-46, nano iron oxide and titanium dioxide into a third reaction kettle, stirring for 10 minutes, adding titanium dioxide, a defoaming agent and a hydrophobic agent, and stirring for 10 minutes to obtain an ultraviolet-resistant coating;
step 3-pretreatment of aluminum foil:
(1) degreasing treatment: placing the aluminum foil in a degreasing tank filled with a degreasing agent, wherein the degreasing agent is an alkaline solution containing sodium ions, the degreasing agent reacts with oil stains on the surface of the aluminum foil, the temperature of the degreasing tank is kept at 30 ℃, the treatment time is 8s, and the pH value is 12;
(2) and (3) water washing treatment: placing the degreased aluminum foil in a degreasing solution cleaning tank for cleaning, placing the aluminum foil in a hot water cleaning tank for primary water cleaning, keeping the temperature of the hot water cleaning tank at 50 ℃, and then placing the aluminum foil in a normal-temperature water cleaning tank for secondary water cleaning; squeezing rollers are arranged at the outlets of the degreasing fluid cleaning tank, the hot water cleaning tank and the normal-temperature water cleaning tank;
(3) and (3) drying treatment: placing the washed aluminum foil in a drying furnace; the temperature of the drying furnace is kept at 300 ℃;
step 4-first coating: coating an anti-ultraviolet coating on the surface of the aluminum foil, and cooling after primary curing at 250 ℃ for 30 s;
step 5-second coating: coating a weather-resistant coating on the surface of the ultraviolet-resistant coating, curing for the second time at 230 ℃ for 35s, and cooling;
step 6-third coating: and (3) coating a hydrophilic coating on the surface of the weather-resistant coating, curing for the third time at 230 ℃ for 30s, and cooling.
Example 3
A preparation process of an anti-ultraviolet super-weather-resistant coating aluminum foil comprises the following steps;
step 1-preparation of hydrophilic coating:
(1) weighing the following raw materials: 42 parts of water-based acrylic acid, 10 parts of ethanolamine and 65 parts of ethylene glycol monobutyl ether;
(2) putting the weighed raw materials into a first reaction kettle for fully stirring to obtain a hydrophilic coating;
step 2-preparation of a weather-resistant coating:
(1) weighing the following raw materials: 20 parts of epoxy resin, 20 parts of polybutadiene resin, 30 parts of tartaric acid, 10 parts of polyacrylamide and 50 parts of propylene glycol methyl acetate;
(2) putting the weighed raw materials into a second reaction kettle for fully stirring to obtain a weather-resistant coating;
step 3-preparation of an ultraviolet-resistant coating:
(1) weighing the following raw materials: 90 parts of bisphenol A epoxy resin, 30 parts of aliphatic amine curing agent, 7 parts of aliphatic amine accelerator, 15 parts of rosin, 30 parts of ethylene glycol, 10 parts of UV-4610 parts, 9 parts of nano iron oxide, 10 parts of titanium dioxide, 2 parts of emulsified silicone oil and 66002 parts of hydrophobic agent;
(2) putting bisphenol A epoxy resin, an aliphatic amine curing agent, an aliphatic amine accelerator, rosin, ethylene glycol, UV-46, nano iron oxide and titanium dioxide into a third reaction kettle, stirring for 15 minutes, adding titanium dioxide, a defoaming agent and a hydrophobic agent, and stirring for 15 minutes to obtain an ultraviolet-resistant coating;
step 3-pretreatment of aluminum foil:
(1) degreasing treatment: placing the aluminum foil in a degreasing tank filled with a degreasing agent, wherein the degreasing agent is an alkaline solution containing sodium ions, the degreasing agent reacts with oil stains on the surface of the aluminum foil, the temperature of the degreasing tank is kept at 40 ℃, the treatment time is 7s, and the pH value is 12;
(2) and (3) water washing treatment: placing the degreased aluminum foil in a degreasing solution cleaning tank for cleaning, placing the aluminum foil in a hot water cleaning tank for primary water cleaning, keeping the temperature of the hot water cleaning tank at 50 ℃, and then placing the aluminum foil in a normal-temperature water cleaning tank for secondary water cleaning; squeezing rollers are arranged at the outlets of the degreasing fluid cleaning tank, the hot water cleaning tank and the normal-temperature water cleaning tank;
(3) and (3) drying treatment: placing the washed aluminum foil in a drying furnace; the temperature of the drying furnace is kept at 300 ℃;
step 4-first coating: coating an anti-ultraviolet coating on the surface of the aluminum foil, and cooling after primary curing at 280 ℃ for 25 s;
step 5-second coating: coating a weather-resistant coating on the surface of the ultraviolet-resistant coating, carrying out secondary curing at 280 ℃ for 30s, and cooling;
step 6-third coating: and (3) coating a hydrophilic coating on the surface of the weather-resistant coating, curing for the third time at 250 ℃ for 25s, and cooling.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.

Claims (9)

1. A preparation process of an anti-ultraviolet super-weather-resistant coating aluminum foil is characterized by comprising the following steps of;
step 1-preparation of hydrophilic coating:
(1) weighing the following raw materials: 30-45 parts of water-based acrylic acid, 5-10 parts of ethanolamine and 45-65 parts of ethylene glycol monobutyl ether;
(2) putting the weighed raw materials into a first reaction kettle for fully stirring to obtain a hydrophilic coating;
step 2-preparation of a weather-resistant coating:
(1) weighing the following raw materials: 10-20 parts of epoxy resin, 10-20 parts of polybutadiene resin, 20-35 parts of tartaric acid, 5-10 parts of polyacrylamide and 15-55 parts of propylene glycol methyl acetate;
(2) putting the weighed raw materials into a second reaction kettle for fully stirring to obtain a weather-resistant coating;
step 3-preparation of an ultraviolet-resistant coating:
(1) weighing the following raw materials: 80-90 parts of bisphenol A epoxy resin, 25-35 parts of aliphatic amine curing agent, 2-7 parts of aliphatic amine accelerator, 7-17 parts of rosin, 20-35 parts of ethylene glycol, UV-465-10 parts, 4-9 parts of nano iron oxide, 10-12 parts of titanium dioxide, 1-2 parts of defoaming agent and 1-3 parts of hydrophobic agent;
(2) putting bisphenol A epoxy resin, an aliphatic amine curing agent, an aliphatic amine accelerator, rosin, ethylene glycol, UV-46, nano iron oxide and titanium dioxide into a third reaction kettle, stirring for 5-15 minutes, adding titanium dioxide, a defoaming agent and a hydrophobic agent, and stirring for 10-20 minutes to obtain an ultraviolet-resistant coating;
step 3-pretreatment of aluminum foil:
(1) degreasing treatment: placing the aluminum foil in a degreasing tank filled with a degreasing agent, wherein the degreasing agent reacts with oil stains on the surface of the aluminum foil, the temperature of the degreasing tank is kept at 20-40 ℃, the treatment time is 7-10s, and the pH is 10-13;
(2) and (3) water washing treatment: placing the aluminum foil subjected to degreasing treatment in a degreasing solution cleaning tank for cleaning, placing the aluminum foil in a hot water cleaning tank for primary water cleaning, and then placing the aluminum foil in a normal-temperature water cleaning tank for secondary water cleaning;
(3) and (3) drying treatment: placing the washed aluminum foil in a drying furnace;
step 4-first coating: coating an anti-ultraviolet coating on the surface of the aluminum foil, and cooling after primary curing at the temperature of 230 ℃ and 300 ℃ for 25-30 s;
step 5-second coating: coating a weather-resistant coating on the surface of the ultraviolet-resistant coating, and cooling after secondary curing at the temperature of 230-300 ℃ for 30-35 seconds;
step 6-third coating: coating a hydrophilic coating on the surface of the weather-resistant coating, curing for the third time at the temperature of 230 ℃ and 250 ℃ for 25-30s, and cooling.
2. The process for preparing the ultra-weatherable ultraviolet-resistant coated aluminum foil as claimed in claim 1, wherein the degreasing agent is an alkaline solution containing sodium ions.
3. The process for preparing an ultra-weatherable coated aluminum foil with ultraviolet resistance as claimed in claim 1, wherein the temperature of the hot water cleaning tank is maintained at 40-60 ℃.
4. The process for preparing the ultraviolet-resistant and super-weather-resistant coated aluminum foil as claimed in claim 1, wherein squeezing rollers are installed at the outlets of the degreasing solution cleaning tank, the hot water cleaning tank and the normal temperature water cleaning tank.
5. The process for preparing the ultra-weatherable ultraviolet-resistant coated aluminum foil as claimed in claim 1, wherein the temperature of the drying furnace is maintained at 300-400 ℃.
6. The process for preparing the ultraviolet-resistant and super-weather-resistant coated aluminum foil as claimed in claim 1, wherein the defoaming agent is silicone emulsion; the hydrophobic agent is 6600.
7. The process for preparing the ultraviolet-resistant and super-weather-resistant coated aluminum foil as claimed in claim 1, 2, 3, 4, 5 or 6, wherein the first reaction kettle, the second reaction kettle and the third reaction kettle have the same structure and size;
the first reaction kettle comprises a kettle body (1), a motor (2) arranged at the top of the kettle body (1), a stirring shaft (3) which is rotatably arranged in the kettle body (1) through a rolling bearing and one end of which extends out of the kettle body (1) and is arranged on an output shaft of the motor (2), a first stirrer (4) arranged on the stirring shaft (3), a second stirrer (5) arranged on the first stirrer (4), and a third stirrer (14) arranged on the stirring shaft (3);
the first stirrer (4) comprises a plurality of stirring rings (6) which are arranged on the stirring shaft (3) through a plurality of supporting columns (15) and distributed along the central axis direction of the stirring shaft (3), fixing columns (7) which are arranged between two adjacent stirring rings (6) at the upper end and the lower end respectively and surround the central axis of the stirring rings (6) in an annular array, and stirring blades (8) arranged on the fixing columns (7);
the second stirrer (5) is positioned between the first stirrer (4) and the stirring shaft (3), the second stirrer (5) comprises a plurality of mixing blades (9) which are arranged on the inner surface of the stirring ring (6) and surround the central axis of the stirring ring (6) in an annular array, the mixing blades (9) are positioned between two adjacent fixing columns (7), and a plurality of mixing blades (10) which are arranged on the mixing blades (9) and are coaxially arranged, and the diameters of the mixing blades (10) are increased along with the increase of the distance between the mixing blades (10) and the stirring shaft (3);
a plurality of mixing holes (11) are arranged on the mixing blade (9); the mixing blade (10) is of a circular arc structure, the mixing blade (10) and the mixing blade (9) are in the same plane, and the central angle subtended by the mixing blade (10) is less than 180 degrees and greater than 90 degrees.
8. The process for preparing the ultra-violet resistant and ultra-weather resistant coated aluminum foil as claimed in claim 7, wherein the third stirrer (14) is a screw type stirrer.
9. The process for preparing the ultraviolet-resistant and super-weather-resistant coated aluminum foil as claimed in claim 7, wherein the stirring blade (8) comprises a stirring fin A (12) of a circular arc structure, and a stirring fin B (13) having one end mounted on the stirring fin A (12) and being symmetrical to the stirring fin A (12).
CN202010513614.5A 2020-06-08 2020-06-08 Preparation process of ultraviolet-resistant super-weather-resistant coating aluminum foil Pending CN111659593A (en)

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