CN111087869A - Polyester section bar ultraviolet light curing colored paint coating and preparation process and preparation equipment thereof - Google Patents
Polyester section bar ultraviolet light curing colored paint coating and preparation process and preparation equipment thereof Download PDFInfo
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- CN111087869A CN111087869A CN201911327848.4A CN201911327848A CN111087869A CN 111087869 A CN111087869 A CN 111087869A CN 201911327848 A CN201911327848 A CN 201911327848A CN 111087869 A CN111087869 A CN 111087869A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
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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
- 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
- B05D3/0263—After-treatment with IR heaters
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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
- 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
- B05D3/06—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 exposure to radiation
- B05D3/061—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 exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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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
- B05D7/24—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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- 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
- B05D2451/00—Type of carrier, type of coating (Multilayers)
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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
- B05D2502/00—Acrylic polymers
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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
- B05D2503/00—Polyurethanes
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- 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
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Abstract
The invention discloses an ultraviolet light curing colored paint coating of a polyester section bar and a preparation method thereof, relating to the technical field of preparation of ultraviolet light curing colored paint coatings, wherein the colored paint coating comprises a bottom coating and a surface coating; the base coat comprises the following raw materials in parts by weight: 0.5 part of phosphate acrylate, 25-30 parts of polyurethane acrylate, 15-44 parts of acrylic resin, 25-49 parts of reactive diluent, 0.5 part of leveling agent and 5 parts of initiator; the top coating comprises the following raw materials in parts by weight: 0.5-1 part of silane coupling agent, 25-30 parts of polyurethane acrylate, 22.4-27.4 parts of acrylic resin, 20-30 parts of reactive diluent, 0.5 part of flatting agent and 6 parts of initiator. The invention adopts N-acryloyl morpholine and the like as solvents, and after the initiation of the ultraviolet initiator, the N-acryloyl morpholine and the like are subjected to complete crosslinking reaction to form a film, so that the weather resistance is excellent, no VOC is volatilized, and the invention is green and environment-friendly.
Description
Technical Field
The invention relates to the technical field of preparation of ultraviolet curing colored paint coatings, in particular to a polyester profile ultraviolet curing colored paint coating and a preparation process and preparation equipment thereof.
Background
Various polyester profile surfaces, especially polyurethane profile surfaces, for example, fully insulated glass fiber polyurethane door and window systems, are new materials for new door and window systems, and the surfaces of the new materials need to be coated with colored paint.
The fully-insulated glass fiber polyurethane door and window system has the advantages of good heat insulation performance (the heat conductivity coefficient is as low as 0.114W/M.K), safety, no volatilization, high strength (the bending strength can reach 1442MPA), acid and alkali resistance, salt fog resistance, good fire resistance (the whole set of door and window can resist fire for 1.0 hour), severe cold resistance (the normal use temperature can reach-50-100 ℃), high temperature resistance (the thermal deformation temperature can reach 240 ℃), insulation and the like.
The traditional coating adopts oily and baking paint, adopts A, B components, has the environmental pollution problems of easy polymerization reaction, spray gun blockage, VOC discharge and amplification, large pungent smell in operation workshops, large sewage amount and the like due to mixing, and has the fatal technical problems of low spraying efficiency, low coating utilization rate, incomplete spraying coverage, high energy consumption, poor weather resistance and the like of the spraying process technology, in particular: firstly, the spray gun is seriously blocked, and the spray gun needs to be washed once in 2 hours; secondly, the spraying efficiency is low, 6 sections (6 meters long) are hung in the spraying cavity at one time, the spraying and drying processes are needed, and the time is required to be more than 2.5 hours for one-time operation; thirdly, the utilization rate of the coating is low, the utilization rate of the coating is only about 35 percent, the residual coating is lost on the inner wall of the spraying cavity and is instantly washed by water, so that the coating is prevented from polymerizing for a long time and is difficult to treat. The flushing waste water contains a large amount of organic coating, the sewage quantity is large, the recovery is difficult, and the coating can not be recycled. The whole set of coating and process is difficult to produce continuously.
Drawings
FIG. 1 is a schematic view of the structure of a production apparatus of the present invention.
In the figure, 1-vacuum spray coating infrared baking unit, 2-vacuum spray coating UV curing unit, 3-first infrared lamp, 4-second infrared lamp, 5-first UV mercury lamp, 6-infrared vacuum spray coating cavity, 7-first plate type condenser, 8-first coating circulating tank, 9-first diaphragm compressor, 10-first vacuum pump, 11-UV vacuum spray coating cavity, 12-second UV mercury lamp, 13-first UV gallium lamp, 14-first UV iron lamp, 15-second diaphragm compressor, 16-second vacuum pump, 17-second plate type condenser, 18-second coating circulating tank, 19-activated carbon adsorption column, 20-first pressure buffer regulating tank, 21-second pressure buffer regulating tank.
Disclosure of Invention
The invention provides an ultraviolet curing colored paint coating for polyester profiles and a preparation process and preparation equipment thereof, which solve the problems that the traditional coating is not environment-friendly and the spraying process is difficult.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a polyester section bar ultraviolet light solidified color paint coating comprises a bottom coating and a surface coating;
the base coat comprises the following raw materials in parts by weight:
0.5 part of phosphate acrylate, 25-30 parts of polyurethane acrylate, 15-44 parts of acrylic resin, 25-49 parts of reactive diluent, 0.5 part of leveling agent and 5 parts of initiator;
the top coating comprises the following raw materials in parts by weight:
0.5-1 part of silane coupling agent, 25-30 parts of polyurethane acrylate, 22.4-27.4 parts of acrylic resin, 20-30 parts of reactive diluent, 0.5 part of flatting agent and 6 parts of initiator.
Preferably, the top coating layer also comprises 0.1 part of auxiliary agent and 20 parts of pigment.
Preferably, the leveling agent is an organic silicon represented by polyether modified polydimethylsiloxane copolymer, such as BYK-333 type or BYK-306 type leveling agent.
Preferably, the initiator is one or a mixture of several of GC-405 type, TPO type, ITX type, 907 type, 1173 type or 184 type initiators.
Preferably, the assistant is a B-461 type, BYK055 type or BYK306 type defoaming agent.
Preferably, the reactive diluent is one or a mixture of N-acryloyl morpholine (ACMO), hydroxyethyl methacrylate (HEMA), cyclotrimethylolpropane formal acrylate (CTFA) or diethylene glycol butyl ether (DBGE).
Preferably, the silane coupling agent is a KH-560 type silane coupling agent.
A preparation process of the polyester profile ultraviolet curing colored paint coating comprises the following steps:
(a) preparation of the primer coating
(a-1) adding phosphate acrylate, polyurethane acrylate, acrylic resin and reactive diluent into a dispersion kettle, starting stirring, and stirring for 5-20 minutes;
(a-2) adding a leveling agent, heating to 40-50 ℃, rapidly stirring, and dispersing for 3-4 h;
(a-3) adding an initiator, stirring for 20-40 minutes to obtain uniform liquid, filtering, and standing for later use;
(b) preparation of the topcoat coating
(b-1) adding the silane coupling agent, the polyurethane acrylate, the acrylic resin and the reactive diluent into a dispersion kettle, starting stirring, and stirring for 5-20 minutes;
(b-2) adding the flatting agent, the auxiliary agent and the pigment, heating to 40-50 ℃, quickly stirring, and dispersing for 3-4 hours;
(b-3) adding an initiator, stirring for 20-40 minutes to obtain uniform liquid, filtering, and standing for later use;
(c) vacuum spraying the base coat paint in the step (a) on the surface of the section to be sprayed under the pressure of 0.1-0.2MPa, baking by an infrared lamp, and then carrying out first UV curing to obtain a base coat;
(d) and (c) vacuum-spraying the top-coating paint in the step (b) on the base-coating paint under the pressure of 0.1-0.2MPa, and carrying out second UV curing to obtain the required coating.
Preferably, the first UV curing in step (c) is irradiation curing using a UV mercury lamp; the second UV curing in the step (d) is irradiation curing using at least one of a UV mercury lamp, a UV gallium lamp, or a UV iron lamp.
The preparation equipment of the polyester profile ultraviolet curing colored paint coating comprises a vacuum spraying infrared baking unit and a vacuum spraying UV curing unit which are connected in sequence;
the vacuum spraying infrared baking unit comprises an infrared vacuum spraying cavity, wherein a plurality of groups of infrared lamps and a plurality of groups of UV mercury lamps are arranged in the infrared vacuum spraying cavity, the infrared vacuum spraying cavity is communicated with a first vacuum pump, the first vacuum pump is communicated with a first plate-type condenser, the infrared vacuum spraying cavity is communicated with a first pressure buffer adjusting tank, the first pressure buffer adjusting tank is communicated with a first diaphragm compressor, the first diaphragm compressor is communicated with a first coating circulating tank, and the first coating circulating tank is communicated with the first plate-type condenser;
vacuum spraying UV solidification unit includes UV vacuum spraying chamber, UV vacuum spraying intracavity is equipped with a plurality of groups UV mercury lamp, UV gallium lamp and UV iron lamp, UV vacuum spraying chamber is linked together with the second vacuum pump, the second vacuum pump is linked together with second plate condenser, first plate condenser and second plate condenser are linked together with the active carbon adsorption post respectively, UV vacuum spraying chamber is linked together with second pressure buffering regulating tank, second pressure buffering regulating tank is linked together with second diaphragm compressor, second diaphragm compressor is linked together with second coating circulation jar, second coating circulation jar is linked together with second plate condenser.
By adopting the technical scheme, the UV curing coating taking N-acryloyl morpholine (ACMO), hydroxyethyl methacrylate (HEMA), cyclo-trimethylolpropane formal acrylate (CTFA) or diethylene glycol butyl ether (DBGE) as a solvent adopts the technical scheme of vacuum spraying and a curing process taking a mercury lamp and an iron lamp composite lamp as a light source, and solves the problems of easy blockage of a spray gun, VOC discharge amplification, incomplete spraying coverage and the like of the traditional heating curing coating in the spraying process. The UV coating prepared by the process can be stably stored for a long time in a dark place, once the UV coating is irradiated by UV light, photons bombard an initiator to generate free radicals, and the free radicals initiate components such as UV unsaturated resin, diluents ACMO, HEMA, CTFA or DBGE and the like to react to form a film, so that the technical problem that the spray gun is blocked by polymerization reaction immediately at room temperature after the components of the traditional thermosetting coating A, B are mixed is solved. Because the UV curing coating adopts ACMO, HEMA, CTFA or DBGE as a main diluent and a curing agent, the ACMO, HEMA, CTFA or DBGE is completely crosslinked to form a film after being initiated by an ultraviolet initiator, the solid content is 100 percent, no VOC is volatilized, and the UV curing coating is green and environment-friendly; the UV curing speed is high, the spraying and curing time of each section only needs 1min, and the section is cured into a finished product at one time; by the vacuum spraying technology, the coating can be recycled, and the utilization rate reaches 100%; no water washing is needed, and no sewage is discharged; the phenomenon of spray gun blockage does not exist, and continuous production can be realized; the salt spray resistance test of the colored paint coating prepared by the method of the invention reaches more than 2500h, which is more than 5 times of that of the traditional coating; the weather resistance reaches more than 15000h, which is more than 2 times of that of the traditional coating; the energy consumption is greatly reduced, and is only 1/5 of the traditional spraying and curing technology.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A polyester section bar ultraviolet light solidified color paint coating comprises a bottom coating and a surface coating;
the base coat comprises the following raw materials in parts by weight:
0.5 part of phosphate acrylate, 25 parts of polyurethane acrylate, 44 parts of acrylic resin, 25 parts of N-acryloyl morpholine (ACMO), 0.5 part of BYK-333 type flatting agent and 5 parts of GC-405 type initiator;
the top coating comprises the following raw materials in parts by weight:
1 part of KH-560 type silane coupling agent, 25 parts of polyurethane acrylate, 22.4 parts of acrylic resin, 25 parts of N-acryloyl morpholine (ACMO), 0.5 part of BYK-333 type flatting agent, 6 parts of GC-405 type initiator, 0.1 part of B-461 type defoaming agent and 20 parts of iron oxide red pigment.
A preparation method of a polyester profile ultraviolet curing colored paint coating comprises the following steps:
(1) preparation of the primer coating
(1-1) adding phosphate acrylate, polyurethane acrylate, acrylic resin and N-acryloyl morpholine (ACMO) into a dispersion kettle, starting stirring, and stirring for 15 minutes;
(1-2) adding a BYK-333 type flatting agent, heating to 45 ℃, quickly stirring, and dispersing for 3.5 hours;
(1-3) adding a GC-405 type initiator, stirring for 30 minutes to obtain uniform liquid, filtering, and standing for later use;
(2) preparation of the topcoat coating
(2-1) adding phosphate acrylate, polyurethane acrylate, acrylic resin and N-acryloyl morpholine (ACMO) into a dispersion kettle, starting stirring, and stirring for 15 minutes;
(2-2) adding a BYK-333 type leveling agent, a B-461 type defoaming agent and an iron oxide red pigment, heating to 45 ℃, quickly stirring, and dispersing for 3.5 hours;
(2-3) adding a GC-405 type initiator, stirring for 30 minutes to obtain uniform liquid, filtering, and standing for later use;
(3) performing dust removal and deburring treatment on the surface of the profile to be sprayed in advance, performing vacuum spraying on the primer coating in the step (1) on the surface of the profile to be sprayed under the pressure of 0.1MPa, baking by using an infrared lamp, and irradiating and curing by using a UV mercury lamp to obtain a primer coating;
(4) and (3) vacuum spraying the top coating in the step (2) on the bottom coating under the pressure of 0.1MPa, and irradiating and curing by using a UV mercury lamp, a UV gallium lamp and a UV iron lamp in sequence to obtain the required coating.
Example 2
A polyester section bar ultraviolet light solidified color paint coating comprises a bottom coating and a surface coating;
the base coat comprises the following raw materials in parts by weight:
0.5 part of phosphate acrylate, 30 parts of polyurethane acrylate, 15 parts of acrylic resin, 15 parts of N-acryloyl morpholine (ACMO), 34 parts of cyclotrimethylolpropane methylal acrylate (CTFA), 0.5 part of BYK-333 type leveling agent, 3 parts of 184 type initiator and 2 parts of ITX type initiator;
the top coating comprises the following raw materials in parts by weight:
1 part of KH-560 type silane coupling agent, 25 parts of urethane acrylate, 27.4 parts of acrylic resin, 10 parts of hydroxyethyl acrylate (HEA), 20 parts of hexanediol diacrylate (HDDA), 0.5 part of BYK-333 type leveling agent, 3 parts of 1173 type initiator, 3 parts of ITX type initiator, 0.1 part of BYK055 type defoaming agent and 20 parts of iron oxide red pigment.
A preparation method of a polyester profile ultraviolet curing colored paint coating comprises the following steps:
(1) preparation of the primer coating
(1-1) adding phosphate acrylate, urethane acrylate, acrylic resin, ACMO and cyclotrimethylolpropane formal acrylate (CTFA) into a dispersion kettle, starting stirring, and stirring for 20 minutes;
(1-2) adding a BYK-333 type flatting agent, heating to 50 ℃, quickly stirring, and dispersing for 4 hours;
(1-3) adding 184 type and ITX type initiators, stirring for 40 minutes to obtain uniform liquid, filtering, and standing for later use;
(2) preparation of the topcoat coating
(2-1) adding the KH-560 type silane coupling agent, the urethane acrylate, the acrylic resin, the HEA and the HDDA into a dispersion kettle, starting stirring, and stirring for 20 minutes;
(2-2) adding a BYK-333 type leveling agent, a BYK055 type defoaming agent and an iron oxide red pigment, heating to 50 ℃, quickly stirring, and dispersing for 4 hours;
(2-3) adding 1173 type and ITX type initiators, stirring for 40 minutes to obtain uniform liquid, filtering, and standing for later use;
(3) vacuum spraying the base coat paint in the step (1) on the surface of the section to be sprayed under the pressure of 0.1-0.2MPa, baking by an infrared lamp, and irradiating and curing by a UV mercury lamp to obtain a base coat;
(4) and (3) carrying out dust removal and deburring treatment on the surface of the profile to be sprayed in advance, carrying out vacuum spraying on the top coating in the step (2) on the base coating under the pressure of 0.1MPa, and sequentially carrying out irradiation curing by a UV mercury lamp and a UV gallium lamp to obtain the required coating.
Example 3
A polyester section bar ultraviolet light solidified color paint coating comprises a bottom coating and a surface coating;
the base coat comprises the following raw materials in parts by weight:
0.5 part of phosphate acrylate, 25 parts of polyurethane acrylate, 20 parts of acrylic resin, 49 parts of diethylene glycol butyl ether (DBGE), 0.5 part of BYK-306 type leveling agent and 5 parts of 184 type initiator;
the top coating comprises the following raw materials in parts by weight:
1 part of KH-560 type silane coupling agent, 30 parts of urethane acrylate, 22.4 parts of acrylic resin, 20 parts of diethylene glycol butyl ether (DBGE), 0.5 part of BYK-306 type leveling agent, 6 parts of 184 type initiator, 0.1 part of BYK306 type defoaming agent and 20 parts of iron oxide red pigment.
A preparation method of a polyester profile ultraviolet curing colored paint coating comprises the following steps:
(1) preparation of the primer coating
(1-1) adding phosphate acrylate, polyurethane acrylate, acrylic resin and diethylene glycol butyl ether (DBGE) into a dispersion kettle, starting stirring, and stirring for 15 minutes;
(1-2) adding a BYK-306 type flatting agent, heating to 45 ℃, quickly stirring, and dispersing for 3.5 hours;
(1-3) adding 184 type initiator, stirring for 25 minutes to obtain uniform liquid, filtering, and standing for later use;
(2) preparation of the topcoat coating
(2-1) adding the KH-560 type silane coupling agent, the urethane acrylate, the acrylic resin and the diethylene glycol butyl ether (DBGE) into a dispersion kettle, starting stirring, and stirring for 15 minutes;
(2-2) adding a BYK-306 type leveling agent, a BYK306 type defoaming agent and an iron oxide red pigment, heating to 45 ℃, quickly stirring, and dispersing for 3.5 hours;
(2-3) adding 184 type initiator, stirring for 25 minutes to obtain uniform liquid, filtering, and standing for later use;
(3) performing dust removal and deburring treatment on the surface of the profile to be sprayed in advance, performing vacuum spraying on the primer coating in the step (1) on the surface of the profile to be sprayed under the pressure of 0.2MPa, baking by using an infrared lamp, and irradiating and curing by using a UV mercury lamp to obtain a primer coating;
(4) and (3) vacuum spraying the top-coating paint in the step (2) on the bottom-coating paint under the pressure of 0.2MPa, and irradiating and curing by a UV gallium lamp and a UV iron lamp in sequence to obtain the required paint.
The base coats prepared in examples 1-3 were tested for their performance, and the results are given in the following table:
| item | Test conditions | Example 1 | Example 2 | Example 3 |
| Energy of surface dry curing | 3KW mercury lamp (mJ/cm)2) | 850 | 850 | 850 |
| hardness/Mitsubishi pencil | 1000g pressure | 2H | 1H | 1H |
| Adhesion force | 1mm grid | Level 0 | |
|
As the base coat is an important factor for enhancing the adhesive force between the surface of the profile to be sprayed and the surface coat, the test result shows that the hardness and the adhesive force of the base coat are greatly influenced along with different using amounts of the active diluent.
The topcoat coatings prepared in examples 1-3 were tested for performance, and the results are given in the following table:
| item | Test conditions | Example 1 | Example 2 | Example 3 |
| Energy of surface dry curing | 3KW mercury lamp (mJ/cm)2) | 850 | 850 | 850 |
| hardness/Mitsubishi pencil | 1000g pressure | 2H | 2H | >2H |
| Adhesion force | 2mm grid | Level 0 | Level 0 | Level 0 |
| Thickness of coating film | 60um | |||
| Resistance to |
5％NaCl*600h | Qualified | Qualified | Qualified |
| Weather resistance | Xenon lamp aging for 2000h | Qualified | Qualified | Qualified |
| Wear resistance | Load of 175g | Qualified | Qualified | Qualified |
The topcoats formed from the topcoating formulations of examples 1-3 have very good adhesion to the surface of the profiles to be sprayed and also have good other properties.
The paint coatings prepared in examples 1-3 were tested for their performance, and the results are given in the following table:
therefore, the colored paint coating prepared by the method has good performances of weather resistance, wear resistance, salt fog resistance and the like. The salt spray resistance of the coating reaches more than 2500h, which is more than 5 times of that of the traditional coating; the weather resistance reaches more than 15000h, which is more than 2 times of that of the traditional coating.
Example 4
A preparation apparatus of polyester section bar ultraviolet light solidified color paint coating, including consecutive vacuum spraying infrared baking machine set 1 and vacuum spraying UV solidifies the machine set 2;
the vacuum spraying infrared baking unit 1 comprises an infrared vacuum spraying cavity 6, wherein a plurality of groups of infrared lamps and a plurality of groups of UV mercury lamps are arranged in the infrared vacuum spraying cavity 6, the infrared vacuum spraying cavity 6 is communicated with a first vacuum pump 10 and can vacuumize the infrared vacuum spraying cavity 6, the first vacuum pump 10 is communicated with a first plate-type condenser 7, the infrared vacuum spraying cavity 6 is communicated with a first pressure buffer adjusting tank 20, the first pressure buffer adjusting tank 20 is communicated with a first diaphragm compressor 9, the first diaphragm compressor 9 is communicated with a first coating circulating tank 8, and the first coating circulating tank 8 is communicated with the first plate-type condenser 7;
vacuum coating UV solidification unit 2 includes UV vacuum coating chamber 11, be equipped with a plurality of groups UV mercury lamp, UV gallium lamp and UV iron lamp in the UV vacuum coating chamber 11, UV vacuum coating chamber 11 is linked together with second vacuum pump 16, can carry out evacuation processing in the UV vacuum coating chamber 11, second vacuum pump 16 is linked together with second plate condenser 17, first plate condenser 7 and second plate condenser 17 are linked together with active carbon adsorption column 19 respectively, UV vacuum coating chamber 11 is linked together with second pressure buffering adjustment tank 21, second pressure buffering adjustment tank 21 is linked together with second diaphragm compressor 15, second diaphragm compressor 15 is linked together with second coating circulation jar 18, second coating circulation jar 18 is linked together with second plate condenser 17.
When in use, the surface of the section bar is simply treated, dust and burrs are removed, the section bar is placed on an input track, the prepared primary coating is poured into a first coating circulating tank 8 in a vacuum spraying infrared baking unit 1, the prepared surface coating is poured into a second coating circulating tank 18 in a vacuum spraying UV curing unit 2, the first coating circulating tank 8 and the second coating circulating tank 18 are closed, the pressure in the tank body during spraying the primary coating and the surface coating can be adjusted through an adjusting valve on the tank body in the spraying process of the primary coating and the surface coating, a first plate condenser 7 and a first vacuum pump 10 are started, an inlet valve of a first pressure buffer adjusting tank 20 is opened, when the pressure in an infrared vacuum spraying cavity 6 is reduced to about-0.05 MPa, a first diaphragm compressor 9 is started, an outlet valve of the first pressure buffer adjusting tank 20 is opened, the adjusting pressure is gradually stabilized at 0.1MPa, opening the UV mercury lamp, and controlling the number of the opened infrared lamps according to factors such as the thickness of a coating film, the conveying speed of the section bar and the like; starting a second plate type condenser 17 and a second vacuum pump 16, opening an inlet valve of a second pressure buffer adjusting tank 21, starting a second diaphragm compressor 15 when the pressure in the UV vacuum spraying cavity 11 is reduced to about-0.05 MPa, opening an outlet valve of the second pressure buffer adjusting tank 21, gradually stabilizing the adjusting pressure at 0.1MPa, and determining the number of UV mercury lamps, UV gallium lamps and UV iron lamps to be opened according to the factors such as the color of a sprayed film, the thickness of the film, the conveying speed of a section bar and the like; and after the spraying is finished, outputting the finished section from an output track, and stacking the products.
In order to promote the degree of automation of preparation equipment, the input track is installed to 1 entrance of vacuum spraying infrared baking unit, the output track is installed to 2 exits of vacuum spraying UV solidification unit, can realize carrying the automation of section bar.
Specifically, two groups of infrared lamps, namely a first infrared lamp 3 and a second infrared lamp 4, are arranged in the infrared vacuum spraying cavity 6, the power of each group of infrared lamps is 200W, and a group of UV mercury lamps, namely a first UV mercury lamp 5, are arranged in the infrared vacuum spraying cavity; and a second UV mercury lamp 12, a first UV gallium lamp 13 and a first UV iron lamp 14 are arranged in the UV vacuum spraying cavity 11, and the power of each group is 6 KW.
The invention adopts N-acryloyl morpholine (ACMO), hydroxyethyl methacrylate (HEMA), cyclotrimethylolpropane methylal acrylate (CTFA) or diethylene glycol butyl ether (DBGE) as a solvent, and adopts composite lamps such as vacuum spraying, mercury lamps and iron lamps as light sources to solve the problems of easy blockage of a spray gun, VOC discharge amplification, incomplete spraying coverage and the like in the spraying process of the traditional thermosetting coating. N-acryloyl morpholine (ACMO), hydroxyethyl methacrylate (HEMA), cyclotrimethylolpropane formal acrylate (CTFA) or diethylene glycol butyl ether (DBGE) are used as a main diluent and a curing agent for the UV curing coating, and the N-acryloyl morpholine (ACMO), the hydroxyethyl methacrylate (HEMA), the cyclotrimethylolpropane formal acrylate (CTFA) or the diethylene glycol butyl ether (DBGE) are completely crosslinked to form a film after being initiated by an ultraviolet initiator, and the UV curing coating is 100% solid content, free of VOC volatilization, green and environment-friendly; the UV curing speed is high, the spraying and curing time of each section only needs 1min, and the section is cured into a finished product at one time; by the vacuum spraying technology, the coating can be recycled, and the utilization rate reaches 100%; no water washing is needed, and no sewage is discharged; the phenomenon of spray gun blockage does not exist, and continuous production can be realized; the salt spray resistance test of the colored paint coating prepared by the process of the invention reaches more than 2500h, which is more than 5 times of that of the traditional coating; the weather resistance reaches more than 15000h, which is more than 2 times of that of the traditional coating; the energy consumption is greatly reduced, and is only 1/5 of the traditional spraying and curing technology.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. A polyester section bar ultraviolet light curing colored paint coating is characterized in that: comprises a base coat and a surface coat;
the base coat comprises the following raw materials in parts by weight:
0.5 part of phosphate acrylate, 25-30 parts of polyurethane acrylate, 15-44 parts of acrylic resin, 25-49 parts of reactive diluent, 0.5 part of leveling agent and 5 parts of initiator;
the top coating comprises the following raw materials in parts by weight:
0.5-1 part of silane coupling agent, 25-30 parts of polyurethane acrylate, 22.4-27.4 parts of acrylic resin, 20-30 parts of reactive diluent, 0.5 part of flatting agent and 6 parts of initiator.
2. The polyester profile ultraviolet light curing colored paint coating of claim 1, wherein: the top coating further comprises 0.1 part of an auxiliary agent and 20 parts of a pigment.
3. The polyester profile ultraviolet light curing colored paint coating of claim 1, wherein: the leveling agent is a BYK-333 type or BYK-306 type leveling agent.
4. The polyester profile ultraviolet light curing colored paint coating of claim 1, wherein: the initiator is one or a mixture of more of GC-405 type, TPO type, ITX type, 907 type, 1173 type or 184 type initiators.
5. The polyester profile ultraviolet light curing colored paint coating of claim 2, wherein: the auxiliary agent is a B-461 type, BYK055 type or BYK306 type defoaming agent.
6. The polyester profile ultraviolet light curing colored paint coating of claim 1, wherein: the active diluent is one or a mixture of more of N-acryloyl morpholine (ACMO), hydroxyethyl methacrylate (HEMA), cyclotrimethylolpropane formal acrylate (CTFA) or diethylene glycol butyl ether (DBGE).
7. The polyester profile ultraviolet light curing colored paint coating of claim 1, wherein: the silane coupling agent is a KH-560 type silane coupling agent.
8. A process for preparing a polyester profile uv-curable colored paint coating according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
(a) preparation of the primer coating
(a-1) adding phosphate acrylate, polyurethane acrylate, acrylic resin and reactive diluent into a dispersion kettle, starting stirring, and stirring for 5-20 minutes;
(a-2) adding a leveling agent, heating to 40-50 ℃, rapidly stirring, and dispersing for 3-4 h;
(a-3) adding an initiator, stirring for 20-40 minutes to obtain uniform liquid, filtering, and standing for later use;
(b) preparation of the topcoat coating
(b-1) adding the silane coupling agent, the polyurethane acrylate, the acrylic resin and the reactive diluent into a dispersion kettle, starting stirring, and stirring for 5-20 minutes;
(b-2) adding the flatting agent, the auxiliary agent and the pigment, heating to 40-50 ℃, quickly stirring, and dispersing for 3-4 hours;
(b-3) adding an initiator, stirring for 20-40 minutes to obtain uniform liquid, filtering, and standing for later use;
(c) vacuum spraying the base coat paint in the step (a) on the surface of the section to be sprayed under the pressure of 0.1-0.2MPa, baking by an infrared lamp, and then carrying out first UV curing to obtain a base coat;
(d) and (c) vacuum-spraying the top-coating paint in the step (b) on the base-coating paint under the pressure of 0.1-0.2MPa, and carrying out second UV curing to obtain the required coating.
9. The process for preparing the ultraviolet curing colored paint coating of the polyester profile according to claim 8, which is characterized in that: the first UV curing in the step (c) is irradiation curing using a UV mercury lamp; the second UV curing in the step (d) is irradiation curing using at least one of a UV mercury lamp, a UV gallium lamp, or a UV iron lamp.
10. The equipment for preparing the polyester section bar ultraviolet curing colored paint coating as claimed in any one of claims 1 to 7, is characterized in that: comprises a vacuum spraying infrared baking machine set (1) and a vacuum spraying UV curing machine set (2) which are connected in sequence;
the vacuum spraying infrared baking machine set (1) comprises an infrared vacuum spraying cavity (6), a plurality of groups of infrared lamps and a plurality of groups of UV mercury lamps are arranged in the infrared vacuum spraying cavity (6), the infrared vacuum spraying cavity (6) is communicated with a first vacuum pump (10), the first vacuum pump (10) is communicated with a first plate type condenser (7), the infrared vacuum spraying cavity (6) is communicated with a first pressure buffer adjusting tank (20), the first pressure buffer adjusting tank (20) is communicated with a first diaphragm compressor (9), the first diaphragm compressor (9) is communicated with a first coating circulating tank (8), and the first coating circulating tank (8) is communicated with the first plate type condenser (7);
vacuum coating UV solidification unit (2) is including UV vacuum coating chamber (11), be equipped with a plurality of groups UV mercury lamp, UV gallium lamp and UV iron lamp in UV vacuum coating chamber (11), UV vacuum coating chamber (11) are linked together with second vacuum pump (16), second vacuum pump (16) are linked together with second plate condenser (17), first plate condenser (7) and second plate condenser (17) are linked together with active carbon adsorption column (19) respectively, UV vacuum coating chamber (11) are linked together with second pressure buffering adjustment tank (21), second pressure buffering adjustment tank (21) are linked together with second diaphragm compressor (15), second diaphragm compressor (15) are linked together with second coating circulation tank (18), second coating circulation tank (18) are linked together with second plate condenser (17).
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| CN102391699A (en) * | 2011-08-31 | 2012-03-28 | 湖南松井新材料有限公司 | Ultraviolet light curing paint |
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