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EP2579995B1 - Procédé destiné au revêtement de canal d'une matière première polymère - Google Patents

Procédé destiné au revêtement de canal d'une matière première polymère Download PDF

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Publication number
EP2579995B1
EP2579995B1 EP11724624.9A EP11724624A EP2579995B1 EP 2579995 B1 EP2579995 B1 EP 2579995B1 EP 11724624 A EP11724624 A EP 11724624A EP 2579995 B1 EP2579995 B1 EP 2579995B1
Authority
EP
European Patent Office
Prior art keywords
component
paint
upper edge
coating
varnish
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11724624.9A
Other languages
German (de)
English (en)
Other versions
EP2579995A1 (fr
Inventor
Thomas Tschurl
Dominic Güldner
Sebastian Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Priority to PL11724624T priority Critical patent/PL2579995T3/pl
Priority to EP11724624.9A priority patent/EP2579995B1/fr
Publication of EP2579995A1 publication Critical patent/EP2579995A1/fr
Application granted granted Critical
Publication of EP2579995B1 publication Critical patent/EP2579995B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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
    • B05D3/04—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 gases
    • B05D3/0406—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 gases the gas being air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
    • 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
    • B05D3/04—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 gases
    • B05D3/0406—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 gases the gas being air
    • B05D3/0413—Heating with air
    • 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
    • B05D3/04—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 gases
    • B05D3/0406—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 gases the gas being air
    • B05D3/042—Directing or stopping the fluid to be coated with air
    • 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
    • B05D7/02—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 macromolecular substances, e.g. rubber
    • 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
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified

Definitions

  • the invention relates to a method and a device for flood coating a polymeric material.
  • Coating and painting in addition to the visual appearance, have a significant impact on the surface finish and durability of a polymeric material. This concerns both the visual impression as well as the color or gloss of the polymeric material, as well as its chemical and mechanical resistance. If the coating adheres poorly to the workpiece to be coated, the application of a permanently adhering lacquer can take place in a two-stage process.
  • a primer is applied, which produces a chemical or physical bond between the polymeric workpiece and the topcoat.
  • the functional layer can be applied.
  • the functional layer and the primer can contain, in addition to colorants and pigments, UV blockers, preservatives and components for increasing the scratch resistance, for example nanoparticles.
  • the primer applied first contains UV blockers and preservatives.
  • the hardcoat is then applied on the primer in a second step.
  • Hardcoats in many cases contain hybrid polysiloxanes which contain both Si-O groups and Si-R groups with organic radicals -R. These hardcoats have a high resistance to mechanical stress and aggressive chemical substances or compounds. This includes above all organic solvents but also dilute acids and bases.
  • the application of the coating of primer and topcoat can be done by different methods. Common methods include brushing and rolling, spraying of aerosols, powder coating, dip coating and flood coating of solutions, emulsions or suspensions, as well as CVD (chemical vapor deposition) and PVD (physical vapor deposition) method from the gas phase. The methods differ significantly in terms of their equipment, the cost and especially for large quantities of their reproducibility.
  • One common method of coating polymeric materials in large numbers is flood coating. For this purpose, a component is acted upon from the top edge with a liquid paint. The resulting coating can be done with one or more fixed flood or paint curtain or with a movable flood robot arm. The running paint wets the entire component depending on the position of the flood robot arm.
  • a disadvantage of the flood coating is the physical layer thickness gradient from the point of the paint application or the upper tipping edge and the lower drip edge of the excess paint.
  • Part of the solvent evaporates on the way over the component to be coated.
  • the decrease in the solvent concentration leads in many cases to an increase in viscosity of the paint in the region of the drip edge.
  • the increase in viscosity at the same time reduces the dripping speed and at the same time causes an increase in the layer thickness in the region of the drip edge.
  • pre- and partially polymerized paint components can collect and accumulate in the area of the drip edge. In the tread area, the required layer thickness is often not reached, while at the drip edge, due to the subsequent flow of the paint, can build up too high a layer thickness.
  • Too small a layer thickness can result in the loss of weathering stability and thus rapid aging of the coated component. In contrast, too high a layer thickness of the paint often causes stress cracking. This effect is intensified when several paint or functional layers are applied to the workpiece to be coated.
  • the DE 199 06 247 A1 discloses a method for producing a two-layer topcoat on motor vehicle bodies.
  • a transparent topcoat layer of a clearcoat coating is applied to a waterborne basecoat.
  • the GB 1,097,461 A discloses a method of printing and dyeing plastic pages or films.
  • the paint can be applied by brushing, spraying or flood coating and then optionally fixed by drying.
  • the GB 1,201,292 A discloses an acrylic varnish for wood, glass, plastic and plastic body parts which can be cured at low temperatures.
  • the acrylic paint can be applied by spraying, dipping, brushing or flood coating.
  • the GB 2 123 841 A discloses a thin, scratch-resistant polyurethane coating which can be applied to the material via dip and flood coating techniques.
  • Possible substrates include transparent polycarbonates and thermoplastic polyurethane slices.
  • WO 2008/134768 A1 discloses a method for flood coating a polymeric material. The coating is done with a preset coating angle.
  • the object of the invention is to provide a method for flood coating a polymeric material, which on the component to be coated uniform
  • Layer thickness of the applied paint layers allows.
  • the layer thickness gradient of the coating from the upper inflow edge to the lower drip edge should be as low as possible.
  • the inventive method for flood coating a polymeric material comprises a first step, wherein at least one component is inserted at an angle of 25 ° to 90 ° to the ground in a holder.
  • the component is then coated from an upper edge with a paint.
  • the paint flows from the upper edge over the component to the drip edge.
  • the paint flows from a paint curtain and / or from a plurality of juxtaposed nozzles onto the component.
  • the paint is applied from a movable nozzle arm on the component.
  • the paint is subjected to an air flow below the upper edge of the component.
  • below the upper edge in the context of the invention includes 30% of the surface of the component adjacent to the edge.
  • the application of the air flow of at least portions within the range below the upper edge increases the evaporation of the solvent in the paint and increases the viscosity of the paint.
  • the increased viscosity slows the flow of the paint in the area below the upper edge and equalizes the layer thickness of the paint below the upper edge of the layer thickness of the paint on the lower drip edge.
  • At least one component is inserted in a holder at an angle of 25 ° to 90 ° to the ground in a first step. Subsequently, the component is heated at an upper edge to a temperature of 25 ° C to 100 ° C and during and / or subsequently from the upper edge of a paint coated.
  • the term "upper edge” refers to 30% of the edge-adjacent surface of the component. The heating of the upper edge can be done with a hot air stream or blower.
  • Heating with the help of radiant heat for example with an infrared radiator.
  • the heating of the component below the upper edge increases, as with the application of an air flow, the evaporation of the solvent in the paint and increases the viscosity of the paint.
  • the increased viscosity slows the flow of the paint in the area below the upper edge and equalizes the layer thickness of the paint below the upper edge (tipping edge) to the layer thickness of the paint at the lower drip edge.
  • the two described embodiments of the method according to the invention can also be repeated in an automated process.
  • the repetition of the paint application and the application of an air stream or the heating of the component allow the deposition of several identical and / or different paint layers.
  • the repetition can take place both on the same device and on different devices according to the invention connected to each other by a treadmill.
  • the component is preferably inserted at an angle of 35 ° to 70 °, more preferably 40 ° to 60 ° to the ground in the holder.
  • the holder preferably contains metals and / or alloys, particularly preferably iron, aluminum, chromium, vanadium, nickel, molybdenum, manganese or polymers such as polyethylene, polypropylene, polystyrene, polyurethanes, polycarbonates, polymethylmethacrylates, polyacrylates, polyesters, polyamides and / or mixtures or Copolymers thereof
  • the air flow preferably has a speed of 1 m / s to 5 m / s, preferably 2 m / s to 4 m / s.
  • the air stream preferably has a temperature of 30 ° C to 150 ° C, preferably from 40 ° C to 80 ° C.
  • the invention further includes a device for flood coating a polymeric material.
  • the device comprises at least one component inserted into a holder at an angle of 25 ° to 90 ° to the ground.
  • the component contains at least one polymeric material, in addition, the component may also contain a metal and / or glass.
  • the polymeric material preferably contains polyethylene, polypropylene, polystyrene, polyurethanes, polycarbonates, polymethylmethacrylates, polyacrylates, polyesters, polyamides, polyethylene terephthalate and / or mixtures or copolymers thereof, more preferably polycarbonate and polycarbonate blends such as polycarbonate / polyethylene terephthalate; Polycarbonate / acrylonitrile-butadiene-styrene; Polycarbonate / polybutylene terephthalate.
  • the component preferably has a surface area of more than 250 cm 2 , more preferably of more than 500 cm 2 .
  • a nozzle preferably a movable robot arm, arranged for applying paint on the component.
  • the nozzle or movable robotic arm allows the paint to be applied to the bottom edge of the floor and 30% of the surface of the component adjacent the edge.
  • An air nozzle and / or heat source is aligned with the top edge of the component.
  • a plurality of air nozzles and / or heat sources may be arranged side by side.
  • the holder is preferably mounted on a treadmill, floor conveyor or overhead conveyor.
  • the treadmill is preferably located within a painting line and thus allows the flood coating of large quantities of the component and several coating steps.
  • the air nozzle or air lance is preferably arranged at a distance of 100 mm to 1000 mm, preferably 150 mm to 400 mm from the component in the temporarily stationary (parked) state.
  • the paint preferably contains a topcoat and / or primer, particularly preferably in the topcoat organically modified silicone resins and / or polyacrylates in the primer.
  • the paint preferably contains solvents, preferably water, alcohols, and / or ketones, more preferably methanol, 2-propanol, n-butanol, 1-methoxy-2-propanol, 4-hydroxy-4-methyl-2-pentanone, and / or mixtures or derivatives thereof.
  • solvents preferably water, alcohols, and / or ketones, more preferably methanol, 2-propanol, n-butanol, 1-methoxy-2-propanol, 4-hydroxy-4-methyl-2-pentanone, and / or mixtures or derivatives thereof.
  • the primer contains solvents, preferably 1-methoxy-2-propanol, 4-hydroxy-4-methyl-2-pentanone, and / or mixtures or derivatives thereof.
  • the topcoat contains solvents, preferably water, more preferably methanol, 2-propanol, n-butanol, and / or mixtures or derivatives thereof.
  • the paint preferably contains 4-methyl-2-pentanone (MIBK) and / or derivatives thereof.
  • MIBK 4-methyl-2-pentanone
  • the use of 4-methyl-2-pentanone surprisingly increases the homogeneity of the layer thickness of the paint produced. Tests have shown an increase in layer thickness in the area of the upper edge (up to about 30% of the length of the component from the upper edge) by 2-10% and a decrease in the layer thickness in the area of the lower edge (up to about 30% of the length of the component of the lower edge) of 2-10%.
  • the invention further comprises the use of the device according to the invention for flood coating of polymeric materials, preferably for flood coating of plastic parts in vehicles, particularly preferably for flood coating of vehicle roofs and / or car glazings made of plastic.
  • FIG. 1 shows a schematic view of a preferred embodiment of the device (10) according to the invention.
  • the component to be coated (1) is located in a holder (2) and is coated by a movable nozzle arm (6) of the upper edge (1a) of the component (1) with lacquer (3).
  • a movable nozzle arm (6) of the upper edge (1a) of the component (1) with lacquer (3).
  • the holder (2) is preferably located on bottom conveyors (8).
  • the floor conveyor (8) on the floor (5) allow the use of the device (10) according to the invention in painting lines and conveyor belts.
  • FIG. 2 shows a schematic view of another preferred embodiment of the device (10) according to the invention.
  • the basic structure corresponds to that in FIG. 3 described construction of the device.
  • the component is heated by a heat source (7b) before or during the coating application (3), not shown.
  • the solvent in the paint (3) evaporates faster in the heated area and thus produces a higher viscosity and layer thickness (a) at the upper edge (1a).
  • the treadmills (8) on the floor (5) allow as well as in FIG. 3 the use of the device (10) according to the invention in the running direction (11) in painting lines and assembly lines.
  • FIG. 3 shows a cross section of a flood-coated component according to the prior art.
  • the component (1) was flood-coated from the upper edge (a ') to the drip edge (b').
  • the paint (3) evaporates when flowing over the component (1), a part of the solvent. This effect is greater, the longer the component (1) and the higher the outside temperature.
  • the decrease of the solvent in the paint (3) causes an increase in the viscosity of the paint (3) and thus a disadvantageous increase in the paint film thickness in the region of the drip edge (b ').

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Claims (10)

  1. Procédé pour le revêtement coulé d'un matériau polymère, où au moins
    a. un composant (1) est inséré dans un support (2) à un angle de 25° à 90° par rapport au sol (5)
    b. le composant (1) est revêtu d'une peinture (3) à partir du bord supérieur (1a) et pendant ce temps la peinture (3) est appliquée dans une région de 30% de la surface du composant (1) adjacente au bord supérieur (1a) avec un flux d'air (4)
  2. Procédé pour le revêtement coulé d'un matériau polymère, où au moins
    a. un composant (1) est inséré dans un support (2) à un angle de 25° à 90° par rapport au sol (5),
    b. le composant (1) est chauffé à une température de 25° C à 100° C sur une région de 30 % de la surface adjacente au bord supérieur (1a) du composant (1) et le composant (1) pendant ce temps ou par la suite est revêtu d'une peinture (3) à partir du bord supérieur (1a).
  3. Procédé selon la revendication 1 ou 2, où l'étape b est répété au moins une fois après 30 à 120 secondes.
  4. Procédé selon l'une des revendications 1 à 3, où le composant (1) est inséré dans le support (2) à un angle de 35° à 70°, de préférence de 40° à 60° par rapport au sol.
  5. Procédé selon l'une des revendications 1 à 4, où le flux d'air (4) a une vitesse de 1 m/s à 5 m/s, de préférence de 2 à 4 m/s.
  6. Procédé selon l'une des revendications 1 à 5, où le débit d'air (4) a une température de 30° C à 150° C, de préférence de 40° C à 80° C.
  7. Procédé selon l'une des revendications 1 à 6, où la peinture (3) contient une couche de finition et/ou un apprêt.
  8. Procédé selon la revendication 7, où la peinture de finition et/ou l'apprêt contiennent des résines de silicone organiquement modifiées et/ou des polyacrylates.
  9. Procédé selon l'une des revendications 1 à 8, où la peinture (3) contient des solvants de préférence, de l'eau, de l'alcool, des phénols et/ou des cétones, et de façon particulièrement préférée de l'éthanol, du méthanol, du 2-propanol, du n-butanol, du 1-méthoxy-2-propanol, du 4-hydroxy-4-methyl-2-pentanon, et/ou des mélanges ou des dérivés de ceux-ci.
  10. Procédé selon l'une des revendications 1 à 9, où la peinture contient du 4-méthyl-2-pentanon (3) et/ou des dérivés.
EP11724624.9A 2010-06-14 2011-06-08 Procédé destiné au revêtement de canal d'une matière première polymère Not-in-force EP2579995B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL11724624T PL2579995T3 (pl) 2010-06-14 2011-06-08 Sposób powlekania materiału polimerowego przez polewanie
EP11724624.9A EP2579995B1 (fr) 2010-06-14 2011-06-08 Procédé destiné au revêtement de canal d'une matière première polymère

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10165851A EP2394747A1 (fr) 2010-06-14 2010-06-14 Procédé destiné au revêtement de canal d'une matière première polymère
PCT/EP2011/059462 WO2011157603A1 (fr) 2010-06-14 2011-06-08 Procédé de revêtement par aspersion d'un matériau polymère
EP11724624.9A EP2579995B1 (fr) 2010-06-14 2011-06-08 Procédé destiné au revêtement de canal d'une matière première polymère

Publications (2)

Publication Number Publication Date
EP2579995A1 EP2579995A1 (fr) 2013-04-17
EP2579995B1 true EP2579995B1 (fr) 2015-02-18

Family

ID=42670498

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10165851A Withdrawn EP2394747A1 (fr) 2010-06-14 2010-06-14 Procédé destiné au revêtement de canal d'une matière première polymère
EP11724624.9A Not-in-force EP2579995B1 (fr) 2010-06-14 2011-06-08 Procédé destiné au revêtement de canal d'une matière première polymère

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10165851A Withdrawn EP2394747A1 (fr) 2010-06-14 2010-06-14 Procédé destiné au revêtement de canal d'une matière première polymère

Country Status (9)

Country Link
US (1) US9162253B2 (fr)
EP (2) EP2394747A1 (fr)
JP (2) JP2013532059A (fr)
KR (2) KR20130073892A (fr)
CN (1) CN102883824B (fr)
ES (1) ES2536630T3 (fr)
PL (1) PL2579995T3 (fr)
PT (1) PT2579995E (fr)
WO (1) WO2011157603A1 (fr)

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Also Published As

Publication number Publication date
EP2579995A1 (fr) 2013-04-17
WO2011157603A1 (fr) 2011-12-22
PT2579995E (pt) 2015-05-27
US9162253B2 (en) 2015-10-20
JP6324932B2 (ja) 2018-05-16
KR20130073892A (ko) 2013-07-03
US20130202798A1 (en) 2013-08-08
EP2394747A1 (fr) 2011-12-14
JP2013532059A (ja) 2013-08-15
KR20160034425A (ko) 2016-03-29
CN102883824A (zh) 2013-01-16
PL2579995T3 (pl) 2015-07-31
KR101743894B1 (ko) 2017-06-05
CN102883824B (zh) 2014-12-03
ES2536630T3 (es) 2015-05-27
JP2016041421A (ja) 2016-03-31

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