[go: up one dir, main page]

EP2373429A1 - Procédé de régulation de la viscosité d'un mélange pulvérisable - Google Patents

Procédé de régulation de la viscosité d'un mélange pulvérisable

Info

Publication number
EP2373429A1
EP2373429A1 EP09835817A EP09835817A EP2373429A1 EP 2373429 A1 EP2373429 A1 EP 2373429A1 EP 09835817 A EP09835817 A EP 09835817A EP 09835817 A EP09835817 A EP 09835817A EP 2373429 A1 EP2373429 A1 EP 2373429A1
Authority
EP
European Patent Office
Prior art keywords
coating
component
stream
coating component
coating composition
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.)
Granted
Application number
EP09835817A
Other languages
German (de)
English (en)
Other versions
EP2373429B1 (fr
EP2373429A4 (fr
Inventor
John Charles Larson
Robert John Barsotti
Laura Ann Lewin
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.)
Coatings Foreign IP Co LLC
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP2373429A1 publication Critical patent/EP2373429A1/fr
Publication of EP2373429A4 publication Critical patent/EP2373429A4/fr
Application granted granted Critical
Publication of EP2373429B1 publication Critical patent/EP2373429B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2472—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device comprising several containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2429—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together after discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2481—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device with a flexible container for liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0869—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the liquid or other fluent material being sucked or aspirated from an outlet orifice by another fluid, e.g. a gas, coming from another outlet orifice
    • 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
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • 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
    • B05D1/34—Applying different liquids or other fluent materials simultaneously

Definitions

  • the present invention is directed to a painting operation and method for controlling the viscosity of a coating composition wherein the coating composition is a sprayable mixture. This spray-applied mixture subsequently forms a layer of the coating composition which can be dried and cured to form a durable protective coating on a substrate.
  • Automobile coatings typically comprise crosslinked polymer network formed by multiple reactive components.
  • the coatings are typically sprayed onto a substrate such as automobile vehicle body or body parts using a spray device and then cured to form a coating layer having such crosslinked polymer network.
  • pot life In spray technologies currently used, multiple reactive components of a coating composition are mixed to form a pot mix prior to spraying and placed in a cup-like reservoir or container that is attached to a spraying device such as a spray gun. Due to the reactive nature of the multiple reactive components, the pot mix will start to react as soon as they are mixed together causing continued increase in viscosity of the pot mix. Once the viscosity reaches a certain point, the pot mix becomes practically un-sprayable. The possibility that the spray gun itself may become clogged with crosslinked polymer materials is also disadvantageous. The time it takes for the viscosity to increase to such point where spraying becomes ineffective, generally up to a two-fold increase in viscosity, is referred to as "pot life".
  • thinning solvent also known as thinning agent
  • VOC volatile organic compounds
  • Another approach is to mix one or more key components, such as a catalyst, together with other components of the coating composition immediately prior to spraying.
  • a catalyst solution is stored in a separate dispenser and being dispensed and mixed with a liquid coating formulation before the coating formulation is atomized.
  • Yet another approach is to separately atomize two components, such as a catalyst and a resin, of a coating composition, and mix the two atomized components after spray.
  • U.S. Patent No. 4,824,017 One such example is described in U.S. Patent No. 4,824,017.
  • such approach requires atomization of two components separately by using separate pumps and injection means for each of the two components.
  • the current invention relates to a painting operation and a method for controlling the viscosity of a sprayable mixture.
  • the method comprises the steps of: (A) producing a first atomized stream of a first coating component of said coating composition through an orifice of said spray gun with a stream of a pressurized carrier, wherein said first coating component is stored in a first storage container and conveyed through a first inlet of said spray gun to said orifice and wherein the viscosity of said first coating component remains substantially constant prior to being conveyed through said first inlet; (B) producing a second atomized stream of a second coating component of said coating composition, wherein the second atomized stream is produced by siphoning the second coating component with a siphoning stream selected from the first atomized stream of the first coating component, the stream of the pressurized carrier, or a combination thereof, from at least one delivery outlet coupled to a second storage container containing said second coating component, said delivery outlet being positioned at said orifice;
  • (C) optionally, regulating the supply of the second coating component to said delivery outlet by coupling a regulatory device to said delivery outlet;
  • the current invention relates to a painting operation and a method for controlling the viscosity of a sprayable mixture. The method comprises the steps of:
  • (C) optionally, regulating the supply of the second coating component to said first delivery outlet by coupling a first regulatory device to said first delivery outlet;
  • Figure 1 shows a spray gun affixed with an example of a representative delivery device of this invention.
  • Figure 2 shows frontal views of the delivery device viewed from the direction 2A indicated in Figure 1.
  • A A schematic presentation of a representative example of the delivery device 2D constructed as an add-on device.
  • B A schematic presentation of a representative example of the delivery device 2' having one delivery outlet constructed into the air cap of the spray gun.
  • C A schematic presentation of a representative example of the delivery device 2" having two delivery outlets constructed into the air cap of the spray gun.
  • D A schematic presentation of a representative example of the delivery device 2'" having three delivery outlets (14) constructed into the air cap of the spray gun.
  • Figure 3 shows an enlarged frontal view, in a schematic presentation, of a representative example of the delivery device 2D constructed as an addon device that can be affixed to an air cap of a spray gun.
  • a single intake coupling (8) is shown.
  • Figure 4 shows an enlarged frontal view, in a schematic presentation, of another representative example of the delivery device 2D' constructed as an add-on device that can be affixed to an air cap of a spray gun.
  • Two intake couplings (8) are shown.
  • Figure 5 shows an enlarged frontal view of details of the delivery device and the relative position of the delivery device and the orifice of the spray gun.
  • Two delivery outlets (14), two connection paths (11) and one orifice (13) are shown.
  • the arrows 6 indicate the direction of a cross-sectional view used in Figures 6, 7 and 8.
  • Figure 6 shows an enlarged side cross sectional view of details of one example of the delivery device and the relative position of the delivery device and the orifice of the spray gun.
  • the orifice (13) can be positioned in three different regions indicated with a, b and c, respectively.
  • Figure 7 shows schematic presentations of examples of the formation of a coating mixture.
  • A An example of a first coating component that is atomized at an orifice of a spray gun without the introduction of a second coating component.
  • B An example of the coating mixture formed by an atomized first coating component and an atomized second coating component.
  • Figure 8 shows schematic presentations of another example of the formation of a coating mixture.
  • a first coating component atomized at an orifice of a spray gun without the introduction of a second coating component.
  • B A coating mixture formed by an atomized first coating component and an atomized second coating component.
  • Figure 9 shows additional examples of the delivery device of this invention constructed as an add-on device.
  • A An example of the delivery device that has a configuration of two intake couplings (8) and two delivery outlets (14).
  • B An example of the delivery device that has a configuration of two intake couplings (8) and one common delivery outlet (14).
  • the orifice (13) is shown in the figure to indicate relative position of the delivery device when affixed to the air cap.
  • the orifice (13) is part of the spray gun.
  • Figure 10 shows schematic presentations of different configurations of the delivery device of this invention.
  • A An example of a delivery device having one intake coupling that is coupled to one storage container.
  • B An example of a delivery device having one intake coupling that is coupled to two individual storage containers.
  • the schematic representations are for illustration purposes only and items in the presentations may not be to scale.
  • the orifice (13) is part of the spray gun.
  • Figure 11 shows an example of another representative configuration.
  • coating composition means a solventborne or waterborne liquid composition that can be applied to a substrate via a spray gun.
  • the coating composition comprises a crosslinkable component and a crosslinking component.
  • the coating composition comprises crosslinkable and crosslinking components that can be mixed together to form a pot mix prior to being spray applied using the method described herein.
  • the coating composition comprises crosslinkable and crosslinking components as separate components that can be applied as separate components using the method described herein.
  • pot mix means a mixture comprising a crosslinkable component and a crosslinking component that is formed prior to spray application. The pot mix can be added to the first storage container (3).
  • Low VOC coating composition means a coating composition that includes less than 0.6 kilograms per liter (5 pounds per gallon), preferably less than 0.52 kilograms per liter (4.3 pounds per gallon) of volatile organic component, and most preferably, less than 0.42 kilograms per liter (3.5 pounds per gallon), such as certain organic solvents.
  • volatile organic component is herein referred to as VOC. VOC level is determined under the procedure provided in ASTM D3960.
  • viscosity of a component remains substantially constant means that the viscosity of the component shows, in one embodiment, an increase of less than 40% over an 8 hour period.
  • the increase in viscosity is less then 25% over a 12 hour period, and in a third embodiment, the viscosity increase is less than 10% over a 16 hour period.
  • the viscosity of a component is measured at the time when the component is initially prepared; the component is stored in a covered container at room temperature for 8, 12 or 16 hours; the viscosity of the component is measured again using the same technique. The difference in the two viscosity measurements should not vary by more than percentages listed above.
  • Several methods to measure the viscosity of a liquid are available. In one embodiment, the Zahn viscosity (in seconds) is measured.
  • Productive paint describes a coating composition wherein an applied layer of the coating composition, 10 to 150 micrometers thick, can be dried and cured, in one embodiment, in less than 20 minutes at 60 0 C or in less than 90 minutes at room temperature.
  • the 10 to 150 micrometers thick layer of productive paint can be dried and cured in less than 10 minutes at 60 0 C or in less than 45 minutes at room temperature.
  • the 10 to 150 micrometers thick layer of productive paint can be dried and cured in less than 5 minutes at 60°C or in less than 20 minutes at room temperature. Room temperature being defined as a temperature in the range of from 21 0 C to 24°C.
  • the coating composition is crosslinked to the point that handling the substrate will not mar the surface, the substrate is dry to the touch and that dirt or dust won't stick to the surface. While some crosslinking has occurred, additional crosslinking can continue over time which will allow for the sanding and/or buffing of the applied layer, if necessary.
  • the sanding and/or buffing operations can occur within one hour of being dried and cured, and more preferably within one-half hour.
  • the phrase "consistent appearance” means that a measured appearance value of a layer of a dried and cured coating composition applied at a time when the painting operation begins, does not vary by a given percentage over the measured appearance value of a layer of the same dried and cured productive paint applied at a time that is 8 hours after the painting operation began.
  • the measured appearance values can be the distinctness of image (DOI) or the long and short wavescan measurements of an applied coating. For the DOI measurement, the percentage change should be less than 10 percent and for the long and short wavescan measurements, the change should be less than 20 percent.
  • DOI distinctness of image
  • the percentage change should be less than 10 percent and for the long and short wavescan measurements, the change should be less than 20 percent.
  • a layer of a coating composition is applied to a first substrate using the method described herein.
  • the applied layer of coating composition is dried and cured and the DOI, long and/or short wavescan measurements of the coating is obtained.
  • a similarly prepared second substrate is coated using the same method and with the same coating composition as was used to coat the first substrate.
  • This second substrate is dried and cured using the same conditions as was used to dry and cure the first substrate.
  • the measured appearance values should not vary by more than the percentages listed. [31] Distinctness of image and the long and short wavescan measurements can be measured using glossmeters or wavescan instruments available from Byk-Gardner USA, Columbia, Maryland.
  • the phrase "good appearance" means that a dried and cured multilayer of a coating composition applied using the method described herein has a short wavescan measurement of less than 40.
  • the short wavescan is less than 30.
  • the short wavescan is less than 20.
  • the long wavescan can also be measured, and to be considered as having a good appearance, the long wavescan measurement should be less than 15.
  • at least one of the applied primer, basecoat or clearcoat layers should be applied according to the present method. In one embodiment, at least the clearcoat composition is applied according to the disclosed method, and in a second embodiment, at least the primer and clearcoat compositions are applied according to the disclosed method.
  • a layer of primer, basecoat and clearcoat compositions are applied using the disclosed method.
  • Crosslinkable component includes a compound, oligomer or polymer having crosslinkable functional groups positioned in each molecule of the compound, oligomer, the backbone of the polymer, pendant from the backbone of the polymer, terminally positioned on the backbone of the polymer, or a combination thereof.
  • Typical crosslinkable components can have on an average 2 to 25, preferably 2 to 15, more preferably 2 to 10, even more preferably 3 to 7, crosslinkable groups selected from hydroxyl, acetoacetoxy, thiol, carboxyl, primary amine, secondary amine, epoxy, anhydride, imino, ketimine, aldimine, silane, aspartate or a suitable combination thereof.
  • crosslinkable group combinations would be excluded from the crosslinkable component of the present invention, since, if present, these combinations would crosslink among themselves (self-crosslink), thereby limiting their ability to crosslink with the crosslinking groups in the crosslinking components defined below.
  • Crosslinking component is a component that includes a compound, oligomer or polymer having crosslinking functional groups positioned in each molecule of the compound, oligomer, the backbone of the polymer, pendant from the backbone of the polymer, terminally positioned on the backbone of the polymer, or a combination thereof, wherein these functional groups are capable of reacting with the crosslinkable functional groups on the crosslinkable component (during the curing step) to produce a coating in the form of crosslinked structures.
  • the crosslinking component can have on an average 2 to 25, preferably 2 to 15, more preferably 2 to 7, and even more preferably 3 to 5 crosslinking groups per molecule.
  • Typical crosslinking components can be selected from a compound, oligomer or polymer having crosslinking functional groups selected from the group consisting of isocyanate, amine, ketimine, melamine, epoxy, carboxylic acid, anhydride, and a combination thereof.
  • a coating composition can further comprise a catalyst, an initiator, an activator or a combination thereof.
  • a catalyst can initiate or promote the reaction between reactants, such as between the crosslinkable functional groups of a crosslinkable component and crosslinking functional groups of a crosslinking component of a coating composition.
  • the amount of the catalyst depends upon the reactivity of functional groups. Generally, in the range of from about 0.001 percent to about 5 percent, preferably in the range of from 0.01 percent to 2 percent, more preferably in the range of from 0.02 percent to 1 percent, all in weight percent based on the total weight of the crosslinkable component solids, of the catalyst is utilized.
  • catalysts can be used, such as, for example, organotin compounds such as dibutyl tin dilaurate, tin (II) octanoate; 1 ,4-diazabicyclo[2.2.2]octane, zinc octoate, thphenyl phosphine, quaternary ammonium compounds, strong bases, aluminum halides, alkyl aluminum halides or tertiary amines, such as, triethylenediamine, depending upon the crosslinkable and crosslinking functional groups.
  • organotin compounds such as dibutyl tin dilaurate, tin (II) octanoate; 1 ,4-diazabicyclo[2.2.2]octane, zinc octoate, thphenyl phosphine, quaternary ammonium compounds, strong bases, aluminum halides, alkyl aluminum halides or tertiary amines, such as
  • An activator can be a compound, oligomer or polymer containing crosslinkable functional groups that react very quickly with the functional groups of the crossl inking group or the activator can be polymers having a high concentration of crosslinkable groups, for example, non-aqueous dispersion or hyperbranched polymers.
  • Such fast reacting compounds, oligomer or polymers can be added as one of the components described herein to help to build the crosslinked network of the applied layer of coating composition.
  • crosslinkable functional groups that react quickly with a crosslinking component comprising isocyanate groups include, amines and/or aspartates.
  • An initiator can initiate one or more reactions. Examples can include photo initiators and/or sensitizers that cause photopolymehzation or curing of a radiation curable coating composition, such as a UV curable coating composition upon radiation, such as UV irradiation. Many photo initiators are known to those skilled in the art and can be suitable for this invention.
  • photo initiators can include, but not limited to, benzophenone, benzoin, benzoin methyl ether, benzoin-n-butyl ether, benzoin-iso-butyl ether, propiophenone, acetophenone, 1 -hydroxycyclohexyl phenyl ketone, 2, 2- diethoxyacetophenone, ethylphenylpyloxylate, diphenyl (2,4,6- thmethylbenzoyl)-phosphine oxide, phosphine oxide, phenyl bis (2,4,6- trimethyl benzoyl), phenanthraquinone, and a combination thereof.
  • the crosslinkable components and the crosslinking components are mixed with the crosslinking catalyst immediately prior to spraying.
  • These catalyzed pot mixtures can have a pot life on the order of a few minutes to several (about 8) hours, after which the viscosity has increased to the point where the spray application of the composition can become difficult.
  • the viscosity of the pot mix can also increase to the point that, while spray application is still feasible, the appearance of the resulting cured coating is degraded to the point of being unsatisfactory.
  • the present disclosure provides a method for controlling the viscosity of a coating composition so that the pot life can be significantly increased over conventional coating practice and that the appearance of the dried and cured coating composition has a consistent appearance during the entire application period.
  • a layer of dried and cured coating composition applied according to the disclosed method can also have a good appearance.
  • One embodiment of the disclosure is directed to a painting operation and a method for controlling the viscosity of a coating composition wherein said coating composition is a sprayable mixture.
  • the coating composition can comprise two or more coating components. The method can comprise the following steps:
  • Another embodiment of the method to control the viscosity of a coating composition wherein said coating composition is a sprayable mixture can comprise the steps of: (A) producing a first atomized stream of a first coating component of said coating composition through an orifice of said spray gun with a stream of a pressurized carrier, wherein said first coating component is stored in a first storage container and conveyed through a first inlet of said spray gun to said orifice, and wherein the viscosity of said first coating composition remains substantially constant prior to being conveyed through first inlet;
  • (C) optionally, regulating the supply of the second coating component to said delivery outlet by coupling a first regulatory device to said first delivery outlet; (D) producing a subsequent atomized stream of a subsequent component of said coating composition, wherein the subsequent atomized stream is produced by siphoning the subsequent coating component with the siphoning stream from at least one subsequent delivery outlet of the delivery device coupled to a subsequent storage container containing said subsequent component, said subsequent delivery outlet being positioned at said orifice;
  • (E) optionally, regulating the supply of the subsequent coating component to said subsequent delivery outlet by coupling a subsequent regulatory device to said subsequent delivery outlet;
  • Any spray gun that can produce a stream of atomized coating composition can be suitable for use with this method.
  • a gravity feed spray gun is preferred.
  • a gravity feed spray gun using a pressurized carrier as an atomization carrier is further preferred.
  • the pressurized carrier can be selected from compressed air, compressed gas, compressed gas mixture, or a combination thereof.
  • the pressurized carrier can be compressed air.
  • a spray gun comprises a spray gun body (1 ), a nozzle assembly
  • the spray gun typically also includes additional controls such as a trigger (22) and a spray fan regulator (20) for regulating compressed air.
  • the first coating component is typically not pressurized and stored in the first storage container
  • the first coating component can be conveyed to the orifice by gravity, siphoning, or a combination of gravity and siphoning.
  • the pressurized carrier can be selected from compressed air, compressed gas, compressed gas mixture, or a combination thereof. Typically, the pressurized carrier is compressed air. Compressed gas, such as compressed nitrogen, compressed carbon dioxide, compressed fluorocarbon, or a mixture thereof, can also be used. The compressed carrier can also include gases produced from compressed liquids, solids, or reactions from liquids or solids.
  • the coating composition can be a primer, a basecoat, a pigmented basecoat, or a clearcoat composition. The coating layer formed therefrom can be a primer layer, a basecoat layer, a pigmented basecoat layer, or a clearcoat layer, respectively.
  • the first coating component can be a pot mix comprising a mixture of the crosslinkable and crosslinking components of a coating composition and the second coating component can include one or more materials selected from a catalyst, an initiator, an activator or a combination thereof.
  • a mixture of the crosslinkable and crosslinking components that can be included in the first coating component and the catalyst/activator/initiator components that can be included as the second coating component are shown in Table 1.
  • crosslinkable functional groups of table 1 can also be used.
  • the crosslinkable component can be a polymer containing both hydroxy functional groups and thiol functional groups.
  • the crosslinkable component can be a blend of polymers containing hydroxy functional groups and copolymers containing thiol functional groups. Suitable crosslinkable components are well-known in the art and are not discussed in- depth.
  • crosslinkable and the crosslinking components in the first coating component While it can be useful to combine the crosslinkable and the crosslinking components in the first coating component, some combinations of crosslinkable and crosslinking components can react too quickly, even in the absence of a catalyst, activator or initiator to use as the first coating component.
  • crosslinkable components containing amine functional groups tend to react too quickly with some crosslinking components, especially crosslinking components containing isocyanate functional groups to used as the sole crosslinkable component.
  • amine containing crosslinkable components can be used up to about 50 percent by weight of the total weight of the crosslinkable component. In another embodiment, amine containing crosslinkable components can be used up to about 20 percent by weight of the total weight of the crosslinkable component.
  • the amine containing crosslinkable components can be blended with other crosslinkable components, or they can be used as the second or subsequent coating component and applied according to the methods described herein.
  • the crosslinkable component can be the first coating component, the crosslinking component can be the second coating component and optionally, a subsequent coating component can be added that can be a catalyst, activator and/or initiator.
  • the crosslinking component can be the first coating component, the crosslinkable component can be the second coating component and optionally, a subsequent coating component can be added that can be a catalyst, activator and/or initiator.
  • first coating components, second coating components and subsequent coating components are not particularly limited.
  • One important consideration is to chose the individual components that make up each of the first, second and subsequent coating components so that the components do not react in such a way as to form crosslinked structures (which results in increasing viscosities) prior to being applied onto the substrate with the method disclosed herein.
  • One of ordinary skill in the art would be able to chose those components in such a way so as to control the viscosity of the components prior to being applied such that when they are combined on the substrates, the components react to form a crosslinked network.
  • the crosslinking reactions used to form the crosslinked network can be addition reactions from the polymerization of unsaturated double bonds using any of the disclosed initiators, condensation reactions resulting from the condensation of, for example, a hydroxy group and an isocyanate group, or a combination of addition and condensation reactions can form the crosslinked network.
  • the current method refers to a painting operation and helps to control the viscosity of a coating composition wherein said coating composition is a sprayable mixture. Controlling the viscosity of the coating composition prior to applying to the substrate helps to maintain a consistent appearance of the subsequently cured coating composition over the entire application period.
  • a pot mix contained the crosslinkable and crosslinking components as well as any catalyst, activators and/or initiators to begin the crosslinking reactions. The crosslinking reactions began as soon as the pot mix was formed, and therefore the viscosity of the pot mix began to rise as soon as it was formed.
  • the initial pot mix applied to a substrate had a relatively low viscosity when compared to the pot mix applied near then end of the life of the pot mix, generally when the viscosity increased by a factor of up to two.
  • the lower viscosity of the first applied pot mix can have different flow characteristics than that of the later applied and more viscous pot mix. This change in flow properties can result in a gradual change in the appearance of the cured coating composition over the entire spray operation. The appearance change can be more pronounced when the application period occurs over a longer time period, such as when applying a coating composition over a large substrate.
  • the disclosed method for controlling the viscosity of a coating composition can result in a layer of a dried and cured coating composition having a consistent appearance.
  • the disclosed method can use a productive paint and provide a layer of a dried and cured coating composition having a consistent appearance.
  • the length of time that it takes to apply the coating composition according to the present method is not particularly critical, and can generally range from several minutes to 8 or more hours. While the method can be used in any painting operation, it can be suitable to use in the automobile refinish, the original equipment manufacturer (OEM) aviation, heavy duty truck and marine industries, and many other industries that apply coating to substrates.
  • OEM original equipment manufacturer
  • the method, as described herein, can be applicable in many commercial painting industries.
  • a quick curing coating is desired so as to maximize production output.
  • quick curing compositions are produced by increasing the amount of catalyst added to the pot mix, which results in short pot life.
  • the pot mix viscosity remains substantially constant during the application, because the catalyst is not added until the atomization step.
  • the substrates can be very large. To coat such large areas, a long pot life composition is needed.
  • pot mixes with low levels of catalysts are able to provide the necessary pot life.
  • a low catalyst level results in a long cure time, which is undesirable.
  • the method as described herein can provide the desired long pot life and also a relatively quick cure.
  • a very low VOC coating is desired due to the expensive solvent/air separation techniques necessary to comply with environmental regulations.
  • These low VOC coatings typically have a short pot life.
  • the current method can provide for low VOC compositions and extended pot life.
  • large amounts of pigments and/or fillers are necessary to give the coatings the desired properties and the pigments and/or fillers can affect the catalyst activity over time due to the absorption of the catalyst onto the pigment/filler surface. This can result in inconsistent curing and pot life issues.
  • the catalyst at the atomization stage reduces the absorption of the catalyst onto the pigment/filler surface which can help to eliminate the curing and pot life issues. It is also known that catalysts and other ingredients that are typically added to clearcoat compositions can lead to the discoloration of the uncured compositions prior to application. The discoloration is often seen as a yellowing of the clearcoat compositions on storage.
  • the present method can be used to add the catalysts and other ingredients during the spraying operation so that there is no color development prior to the application of the composition.
  • the one or more components of the second coating component can be siphoned separately such as in the configurations shown in Figures 9A, 1 OC, 1OE or 1 OH.
  • the one or more sub-components of the second coating component can be siphoned together such as in the configurations shown in Figure 1 OB.
  • the second coating component can be siphoned from at least one delivery outlet (14) with a siphoning stream selected from the first atomized stream of the first coating component, the stream of the pressurized carrier, or a combination thereof.
  • the delivery outlet is coupled to a second storage container containing said second component, said delivery outlet being positioned at said orifice. Said delivery outlet and said orifice can be positioned at any relative angles or relative positions such that the siphoning can effectively take place.
  • siphoning is believed to occur when the siphoning stream is moving at high speed at the delivery outlet causing negative air pressure around the delivery outlet. Such negative air pressure is believed to cause the second coating component to be conveyed to the delivery outlet. High velocity of the stream of the pressurized carrier and sudden change in air pressure associated with the negative air pressure at the delivery outlet are believed to cause the second coating component to become atomized and intermixed into the siphoning stream and the first atomized stream of the first coating component.
  • the first and the second coating components can be mixed at a pre-determined mixing ratio to form the coating mixture.
  • the second coating component can also be conveyed to the delivery outlet by gravity or a combination of gravity and siphoning in certain embodiments of configurations disclosed herein.
  • Both the first and the second coating component can be stored in respective storage containers at atmosphere pressure.
  • the second coating component can be siphoned with different siphoning stream.
  • the second coating component can be siphoned primarily by the pressurized carrier moving at high speed in the direction shown by the arrow (32).
  • Figure 7 shows examples of a delivery device having two delivery outlets.
  • Figure 8 shows examples of a delivery device having one delivery outlet. The pressurized carrier then continues to produce atomized first coating component at the orifice (13).
  • the atomized first and second coating component can be intermixed to form the coating mixture (16) ( Figures 7B and 8B).
  • the second coating component can be siphoned primarily by a combination of the pressurized carrier moving at high speed in the direction shown by the arrow (32) and the first atomized stream of the first coating component. If the second coating component is not supplied to the delivery outlet, for example, if a regulatory device (32) is turned off, then only the first coating component is atomized (15) ( Figures 7A and 8A). Flow of the first coating component is indicated by the arrow (31). Flow of the second coating component is indicated by the arrows (30).
  • the coating mixture can be applied over a substrate.
  • a painter can hold the spray gun at a certain distance from the substrate and move it in desired directions so the coating mixture can be sprayed over the substrate forming a layer of the coating composition.
  • This invention can further comprise the step of curing the layer of the coating composition on the substrate to form a coating thereon. This curing step can depend upon the coating composition used.
  • the layer can be cured at ambient temperatures or elevated temperatures, up to 180 0 C.
  • the curing can also be done by exposing the coating layer to radiation, such as UV light or electron beam, when the coating composition is radiation curable.
  • the substrate can include wood, plastic, leather, paper, woven and nonwoven fabrics, metal, plaster, cementitious and asphaltic substrates, and substrates that have one or more existing layers of coating thereon.
  • the substrate can be a vehicle, vehicle body, or vehicle body parts.
  • the method to control the viscosity of a coating composition can comprise the steps of:
  • (C) optionally, regulating the supply of the second coating component to said delivery outlet by coupling a first regulatory device to said first delivery outlet;
  • (E) optionally, regulating the supply of the subsequent coating component to said subsequent delivery outlet by coupling a subsequent regulatory device to said subsequent delivery outlet;
  • the first delivery outlet and the subsequent delivery outlet can be separate delivery outlets or combined into a single delivery outlet.
  • Figures 2C, 2D, 4, 5, 6, 7, 9A show some examples of separate delivery outlets.
  • Figure 9B show one example where two delivery outlets can be combined into a single delivery outlet. Based on disclosure of this invention herein, more delivery outlets and/or different placement and positioning of delivery outlets can be configured by those skilled in the art without departing from the scope and spirit of this invention.
  • All the components, including the first and the second coating component, and any subsequent component can be stored in respective storage containers at atmosphere pressure.
  • One advantage of this invention is that said atomized first coating component, said atomized second coating component, and any subsequent coating component if present, can be mixed at a pre-determined mixing ratio to form said coating mixture without the need for complex controls such as those described in aforementioned U.S. Patent No. 4,824,017.
  • the predetermined mixing ratio can be determined by modulating or selecting the size of the delivery outlet (14), the size of connecting path (11 ), or by providing a regulatory device such as a flow rate controller functionally coupled to said delivery device, or a combination thereof. It can be configured that one regulatory device can regulate the flow rate of one or more delivery outlets. Mixing ratio can also be controlled by modulating the viscosity of the first, the second or both the first and the second coating components.
  • viscosity of the second coating component can be increased to reduce the amount being siphoned into the coating mixture. In another example, viscosity of the second coating component can be reduced to increase the amount being siphoned into the coating mixture. Similarly, viscosity of the first coating component can be reduced or increased as needed to achieve a desired mixing ratio.
  • mixing ratio can be constant within a wide range of pressures of the pressurized carrier ranging from 20 - 80 pounds per square inch gauge (psig).
  • pressure of the pressurized carrier can be in a range of from 25 to 70 psig.
  • pressure of the pressurized carrier can be in a range of from 28 to 65 psig.
  • pressure of the pressurized carrier can be in a range of from 30 to 60 psig.
  • the mixing ratio can be determined by selecting different sizes of the diameter of the delivery outlet. Coating mixtures formed by using different sizes of the outlets can be sprayed onto suitable substrates. Properties of the coating layers formed thereon can be measured.
  • the regulatory device can be selected from a mechanical flow restrictor, an electric flow resthctor, a pressure controlled flow restrictor, an actuated pneumatic flow restrictor, or a combination thereof.
  • a mechanical flow restrictor can include a tube with a pre-determined flow pass diameter that is coupled to the delivery outlet, or a mechanical valve that can control flow passage.
  • Examples of an electronic flow restrictor can include electrical valves or a electrical valve actuator.
  • a pressure controlled flow restrictor can be any mechanical or electric controllers that can control flow based on pressure.
  • a flow rate controller such as a valve or a commercial inline flow controller can be coupled to the delivery outlet to adjust the flow of the second coating component therefore affecting mixing ratio.
  • a flow rate controller can also be a small insert that is placed inside a connection path or a tubing connected to a connection path that is coupled to the delivery outlet. Such an insert can effectively reduce the size of the connection path or the tubing therefore reduces the flow of the second coating component.
  • Selection of sizes and the use of flow rate controller can be combined. For example, a size within a suitable range of the delivery outlet can be selected and a valve can be coupled to the delivery outlet so the mixing ratio can be fine tuned. Any flow rate controller that can be coupled to the delivery outlet can be suitable for this invention.
  • a regulatory device can be coupled to a delivery outlet at any places that can effectively regulate flow to that delivery outlet.
  • the regulatory device can be coupled at an intake coupling or be placed in a connection path connecting to that particular delivery outlet.
  • the regulatory device can also be placed at any place along a tubing that delivers the second or the subsequent coating component from its storage container to the intake coupling of the delivery device.
  • Another advantage of this invention is to have fast curing while maintaining extended pot life.
  • short pot life is a challenge when a coating composition is formulated to be fast curing since all components are mixed together in a pot mix and curing reaction starts immediately upon mixing.
  • the coasting composition can have extended pot life before spraying since one or more component for cuing, such as a catalyst, is not mixed together.
  • the coating composition can then be cured rapidly after spraying since the second coating component, such as a catalyst, is mixed after atomization during spraying.
  • Yet another advantage of this invention is that some aspects of spraying or the coating property can be modified in an on-demand fashion.
  • curing time of a coating composition can be modulated by modifying the amount of a catalyst mixed into the coating composition during spraying. It can be done by tuning the regulatory device while spraying.
  • This disclosure is further directed to a system for controlling the viscosity of a coating composition.
  • the system can comprise:
  • a spray gun comprising a spray gun body (1), one or more inlets, a nozzle assembly (2) including an orifice (13) and an air cap (24); and
  • the delivery outlet (14), the intake coupling (8), and the connection path (11 ) can be constructed as an add-on device affixed to the air cap of the spray gun, or can be constructed into the air cap of said spray gun.
  • the add-on device can include the ones shown in Figures 2A, 3, 4, 9A and 9B.
  • the add-on device can be affixed to the air cap using conventional means such as one or more screws, clips, clamps, adhesives, latches, or a combination thereof.
  • Examples of the delivery device constructed into the air cap can include those shown in Figures 2B, 2C and 2D.
  • the delivery device can comprise one delivery outlet, such as those shown in Figures 2A, 2B and 3.
  • the delivery device can also comprise two or more delivery outlets, such as those shown in Figures 2C, 2D, 4, and 9A. Two or more delivery outlets can be combined into a single delivery outlet, such as the one shown in Figure 9B.
  • FIG. 2A, 3, 4, 9A, and 9B Representative configurations of the add-on device (2D) can be shown in Figures 2A, 3, 4, 9A, and 9B.
  • the system can have a single delivery outlet (14), such as shown in Figures 2A, 3, and 9B; or two or more delivery outlets (14) as shown in Figures 4 and 9A.
  • a single delivery outlet 14
  • the add-on device can be used with other spray guns, nozzle assemblies, air caps, or a combination thereof.
  • Figure 5 shows an enlarged frontal view of the orifice (13) and two of the delivery outlets (14).
  • Figure 6 shows a cross sectional side view of the delivery device indicating the relative positions of two of the delivery outlets (14) and the orifice (13) wherein each of the delivery outlets (14) is positioned at said orifice (13).
  • the second (or a subsequent) coating component can be siphoned with different siphoning stream.
  • perpendicular relative position is shown in the Figures and examples of this disclosure, the delivery outlet and the orifice can be positioned in any relative positions such that siphoning can effectively take place.
  • a delivery device of this invention can be configured to have multiple intake couplings (8), multiple connection paths (11 ) or multiple delivery outlets (14) as shown in representative examples in Figures 2C, 2D, 4, 9A, and 9B. Other examples of configurations are shown in Figures 10A through 10H. In another representative configuration, two or more connection paths can be combined at a point so the connection paths are connected to a single delivery outlet (14), which can be positioned at the orifice (13). One example is shown in Figure 9B.
  • the one or more intake couplings (8) can be configured to couple with one or more individual storage containers (4) through direct coupling, such as plug on or screwed on, or via connection means such as fixed or flexible tubing. Additional hardware such as one or more "Y" shaped connectors can also be used.
  • FIG. 10 Examples of suitable configurations are shown in Figure 10: (A) a delivery device having a single delivery outlet/intake coupling that is coupled to a single container; (B) a delivery device having a single intake coupling that is coupled to two individual containers; (C) a delivery device having two outlets/intake couplings that are coupled to two individual containers (shown) or a single container (not shown); (D) - (H) a delivery device having multiple outlets and intake couplings that only some of them are coupled to one or more containers, wherein the other intake(s) can be closed.
  • a delivery device When a delivery device has two or more intake couplings and only one of them is coupled to a container, it is preferred to close the un-coupled intake couplings via conventional means, such as a cap, a plug, or a valve.
  • one or more regulatory devices (32) that controls flow rate such as a valve, an insert, a clamp, or a commercial inline flow controller can be positioned and configured to control flow rate of one or more components at one or more positions.
  • the regulatory device can be selected from a mechanical flow restrictor, an electric flow resthctor, a pressure controlled flow restrictor, or a combination thereof.
  • FIG 11 shows an example of another representative configuration.
  • the container (4) can be connected at the top of the intake coupling (8) via conventional connections, such as a screw connection or a plug-in connection.
  • a regulatory device (32), such as a valve can be placed in the path connecting the container (4) and the intake coupling (8).
  • the regulatory device (32) is a valve has two coupling ends: one coupled to the intake coupling (8) and the other coupled to the container (4).
  • the regulatory device (32) is a valve built in the container that can be coupled to the intake coupling (8).
  • the regulatory device (32) is a valve built in the intake coupling (8) that can be coupled to the container (4).
  • the regulatory device (32) can be turned on or off manually, or by connecting to the trigger (22) mechanically or electronically. It is preferred that the regulatory device (32) can be turned off when the spray gun is not spraying to prevent leaking of the contents in the container (4) and can be turned on to allow the content in the container (4) to flow to the delivery outlet (14).
  • the storage container (4) containing the second or a subsequent coating component can be a flexible container, such as a plastic bag; a fixed- shape container, such as a canister made of metal or hard plastic; or a flexible inner container inside a fixed-shape container, such as a flexible plastic bag placed inside a fixed-shape metal container. A flexible container that can be collapsed easily is preferred.
  • the flexible container can be a collapsible liner that can be sealed and used directly or be placed inside a fixed shape container.
  • the storage container can be transparent or have a transparent window so the level of the content in the container can be readily visible.
  • the storage container can have an indicator to indicate the level of the contents in the container.
  • the storage container can be disposable or reusable.
  • the storage container can be coupled to an intake coupling (8) which is connected to the delivery outlet (14) through a connection path (11 ).
  • the storage container can be coupled to the intake coupling (8) via conventional means, such as a clip, a clamp, a set of matching screw tracks, or a plug-in.
  • the storage container comprises a tube that can be plugged into the intake coupling (8).
  • the storage container is screwed onto the intake coupling (8) via matching screw tracks.
  • the storage container is plugged into the intake coupling (8) and secured by an additional fastener.
  • the storage container can further have a unidirectional flow limiter (26) to eliminate back flow, wherein said unidirectional flow limiter can only allow the content to flow in one direction, such as only from the container to the delivery outlet. Any back flow can be stopped by the directional flow limiter to avoid potential contamination.
  • ventilation can be provided so the contents in the container can be maintained at atmosphere pressure.
  • Viscosity can be determined by using Zahn cup #2 viscosity measurements in second. Pot life in following examples is defined by the length of time required to double viscosity of the coating composition or the relevant pot mix.
  • Micro-hardness of the coatings was measured using a Fischerscope hardness tester (model HM 100V). The tester was set for maximum force of 100 mN ramped in series of 50, 1 second steps. The hardness was recorded in N/mm.
  • Wavescan was measured using a Wavewscan instrument from Byk- Gardner. Both short (s) and long (L) values were recorded.
  • Cotton free test after baking the coating, the panel was tested by dropping a cotton ball from a distance of 1 inch. The cotton ball was left on the coating for 2 minutes and then the panel was inverted. If the cotton ball falls off the panel, without leaving any residue, it is said to be cotton free.
  • Coating Examples 1-3 DuPont ChromaClear® G2-7779STM, under respective registered or unregistered trademarks, was mixed with an activator 7775S (both available from E. I. duPont de Nemours and Company, Wilmington, USA) according to manufacturer's directions to form a first coating mix, also referred to as a first coating component.
  • the first coating component was placed in the main storage container (also referred to as a first storage container) of a gravity spray gun.
  • the clearcoats prepared above were sprayed over Uniprime (ED-5000, cold-rolled steel (04X12X032)B952 P60 DIW unpolish Ecoat POWERCRON 590 from ACT Laboratories, Hillsdale, Mich.) to a film thickness of 2.3 to 2.6 mils.
  • the coatings were baked for 5 min or 10 min at 60 0 C as indicated.
  • DBTDL dibutyltin dilaurate
  • Examples 4-6 DuPont ChromaClear® G2-7779STM is placed in a first storage container of a gravity spray gun as a first coating component.
  • the activator 7775S is placed in a second storage container of the spray gun as a second coating component.
  • Mixing ratio between the first and the second coating component is set at about 12/3.
  • Example 4 0.125% of DBTDL as in Example 1 is used as a third coating component and placed in a third storage container. Mixing ratio of the first/the second/the third coating components is set as 12/3/1.
  • Example 5 0.125% of DBTDL and 2% acetic acid as in Example 2 is used as a third coating component and placed in a third storage container. Mixing ratio of the first/the second/the third coating components is set as 12/3/1.
  • Example 6 0.0625% of DBTDL and 0.5% acetic acid as in Example 3 is used as a third coating component and placed in a third storage container. Mixing ratio of the first/the second/the third coating components is set as 12/3/1.
  • Coatings are sprayed over substrates as described in Examples 1 -3.
  • DuPont ChromaClear® G2-7779STM is mixed with an activator 7775S as in Example 1 -3 and is placed in the first storage container of a gravity spray gun as a first coating component.
  • DBTDL at the concentration of 0.25% is used as a second coating component and placed in a second storage container.
  • Four percent acetic acid in ethyl acetate is used as a third coating component and placed in a third storage container.
  • a mixing ratio of the first/the second coating components 3/0.5 is used.
  • a valve controlling the flow of the third coating component (4% acetic acid) is initially turned on so acetic acid is mixed into the coating mixture. The valve is then slowly turned off during spray so decreasing amount of acetic acid is mixed into the coating mixture. Coating is sprayed over substrates as described in Examples 1 -3.
  • Acetic acid is believed to modulate the activity of the catalyst DBTDL. With less acetic acid, the activity of DBTDL is higher so the coating can be cured faster. With decreasing amount of acetic acid during spray, the entire coating layer can cure evenly.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne un procédé permettant de réguler la viscosité d'un mélange pulvérisable. Le mélange pulvérisable forme une couche d'une composition de revêtement sur un substrat recouvert et forme un réseau réticulé après le séchage et le durcissement de la couche. La composition séchée et durcie dote le substrat d'un revêtement de bel aspect.
EP09835817.9A 2008-12-23 2009-12-23 Procédé de régulation de la viscosité d'un mélange pulvérisable Not-in-force EP2373429B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34210608A 2008-12-23 2008-12-23
PCT/US2009/069359 WO2010075486A1 (fr) 2008-12-23 2009-12-23 Procédé de régulation de la viscosité d'un mélange pulvérisable

Publications (3)

Publication Number Publication Date
EP2373429A1 true EP2373429A1 (fr) 2011-10-12
EP2373429A4 EP2373429A4 (fr) 2015-04-15
EP2373429B1 EP2373429B1 (fr) 2019-08-28

Family

ID=42288140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09835817.9A Not-in-force EP2373429B1 (fr) 2008-12-23 2009-12-23 Procédé de régulation de la viscosité d'un mélange pulvérisable

Country Status (3)

Country Link
EP (1) EP2373429B1 (fr)
MX (1) MX2011006740A (fr)
WO (1) WO2010075486A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102458676A (zh) 2009-06-25 2012-05-16 纳幕尔杜邦公司 喷涂装置及其用途

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116652A1 (de) * 1980-05-28 1982-11-25 Vianova Kunstharz AG, 8402 Werndorf Lackierverfahren und -vorrichtung
US5954273A (en) * 1997-04-22 1999-09-21 Minnesota Mining And Manufacturing Company Spray assembly for high viscosity materials
WO2010050998A1 (fr) * 2008-10-31 2010-05-06 E. I. Du Pont De Nemours And Company Procédé de production de couche de revêtement
WO2010050999A1 (fr) * 2008-10-31 2010-05-06 E. I. Du Pont De Nemours And Company Dispositif permettant d'introduire un catalyseur dans une composition de revêtement atomisée

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5536247A (en) * 1978-09-08 1980-03-13 Nippon Soda Co Ltd Electrophoretic paint composition for cathode deposition
US4824017A (en) 1986-07-14 1989-04-25 Glas-Craft, Inc. External mix spraying system
US5052623A (en) * 1990-09-10 1991-10-01 Nordeen Melvin A Compartmentalized paint cup with selector valve for spray guns
US5772116A (en) * 1993-12-02 1998-06-30 Holt; Earl R. Recirculating paint system having an improved spray gun
US20040249114A1 (en) * 2001-02-06 2004-12-09 Graham Swift Methods of synthesis of polysuccinimide or polyaspartate by end capping polymerization
US6894123B2 (en) * 2003-03-21 2005-05-17 E.I. Du Pont De Nemours And Company Acetoacetylated polyvinyl polymers and curable coating compositions made therefrom
US7201289B2 (en) 2004-06-16 2007-04-10 E. I. Du Pont De Nemours And Company Method for introducing a catalyst solution into a coating formulation
US7311265B2 (en) * 2004-07-27 2007-12-25 E.I. Du Pont De Nemours And Company Hand-held spraying apparatus having a multi-compartment liquid-holding reservoir
US20070116960A1 (en) * 2005-06-22 2007-05-24 Nickel Gary W Aviation coating compositions and the use thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116652A1 (de) * 1980-05-28 1982-11-25 Vianova Kunstharz AG, 8402 Werndorf Lackierverfahren und -vorrichtung
US5954273A (en) * 1997-04-22 1999-09-21 Minnesota Mining And Manufacturing Company Spray assembly for high viscosity materials
WO2010050998A1 (fr) * 2008-10-31 2010-05-06 E. I. Du Pont De Nemours And Company Procédé de production de couche de revêtement
WO2010050999A1 (fr) * 2008-10-31 2010-05-06 E. I. Du Pont De Nemours And Company Dispositif permettant d'introduire un catalyseur dans une composition de revêtement atomisée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2010075486A1 *

Also Published As

Publication number Publication date
WO2010075486A1 (fr) 2010-07-01
EP2373429B1 (fr) 2019-08-28
MX2011006740A (es) 2011-07-13
EP2373429A4 (fr) 2015-04-15

Similar Documents

Publication Publication Date Title
US8210452B2 (en) Device for introducing catalyst into atomized coating composition
US20120100296A1 (en) Gravity fed spray device and methods for spraying multiple components
US20110197811A1 (en) Device for introducing catalyst into atomized coating composition
US20110200835A1 (en) Method for producing coating layer
US20120100297A1 (en) Method for spraying multiple components
US9156057B2 (en) Method for controlling the viscosity of a sprayable mixture
EP2373429B1 (fr) Procédé de régulation de la viscosité d'un mélange pulvérisable
WO2010151762A9 (fr) Procede de pulverisation et son utilisation
US20120141683A1 (en) Spray device for coating and use thereof
EP2393608B1 (fr) Procédé pour la production de mélange pulvérisable contenant des groupes réticulables protégés
US20120097767A1 (en) Spray device for spraying multiple components and use thereof
US20110224368A1 (en) Method for producing sprayable mixture containing protected crosslinkable groups
US20120282413A1 (en) Method for spraying multiple components
US20120085838A1 (en) Spray device for catalyst atomization
US20110245411A1 (en) Method for producing sprayable lacquer

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110705

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: COATINGS FOREIGN IP CO. LLC

RA4 Supplementary search report drawn up and despatched (corrected)

Effective date: 20150313

RIC1 Information provided on ipc code assigned before grant

Ipc: B05B 9/03 20060101AFI20150309BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20170807

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190318

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602009059652

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1171722

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190915

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190828

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191230

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191128

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191128

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191129

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191228

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1171722

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200224

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602009059652

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG2D Information on lapse in contracting state deleted

Ref country code: IS

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20200603

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20191231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191223

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191223

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191231

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20091223

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 602009059652

Country of ref document: DE

Owner name: AXALTA COATING SYSTEMS GMBH, CH

Free format text: FORMER OWNER: COATINGS FOREIGN IP CO. LLC, WILMINGTON, DEL., US

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190828

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20221228

Year of fee payment: 14

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230510

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602009059652

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240702

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240702