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WO2010080202A1 - Revêtement pulvérulent de polymère fluoré en film épais - Google Patents

Revêtement pulvérulent de polymère fluoré en film épais Download PDF

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Publication number
WO2010080202A1
WO2010080202A1 PCT/US2009/063783 US2009063783W WO2010080202A1 WO 2010080202 A1 WO2010080202 A1 WO 2010080202A1 US 2009063783 W US2009063783 W US 2009063783W WO 2010080202 A1 WO2010080202 A1 WO 2010080202A1
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WO
WIPO (PCT)
Prior art keywords
composition
coating
build agent
coating composition
thermofluoroplastic
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.)
Ceased
Application number
PCT/US2009/063783
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English (en)
Inventor
Blake E. Chandler
Jeffrey G. Linert
Naiyong Jing
Mark J. Williams
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3M Innovative Properties Co
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3M Innovative Properties Co
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Filing date
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Publication of WO2010080202A1 publication Critical patent/WO2010080202A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/18—Homopolymers or copolymers of tetrafluoroethene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids
    • C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides

Definitions

  • the present invention relates to a composition
  • the invention provides a process for powder coating.
  • the present invention relates to an article made by the process for powder coating.
  • polymer and polymeric material refer to both materials prepared from one monomer such as a homopolymer or to materials prepared from two or more monomers such as a copolymer, terpolymer, or the like.
  • polymerize refers to the process of making a polymeric material that can be a homopolymer, copolymer, terpolymer, or the like.
  • copolymer and copolymeric material refer to a polymeric material prepared from at least two monomers.
  • the present invention is directed to chemically resistant compositions. Specifically, the present invention relates to fluoropolymer powder coating compositions, processes for coating substrates with same, and articles created from such processes. Because of their resistance to chemicals, fluoropolymers are used as liners for chemical vessels, pipes, valves, pumps and other process equipment. Often chemical vessels are sheet lined, rotomolded, or powder coated to provide a protective barrier. Powder coated vessels typically require many coats of a fluoropolymer composition to build up an adequate thickness of a fluoropolymer layer because of the limitation of the electrostatic properties of fluoropolymers.
  • the maximal fluoropolymer layer thickness is typically about 4 mils in one pass or coat before the coating begins to "back ionize".
  • Back ionization typically results in visible bumps, starring or pitting in the fluoropolymer layer before fusing. This back ionization can be visible as defects in the surface of finished (or fused) articles coated with the fluoropolymer layer.
  • the effective charge of the fluoropolymer powder composition is self limiting, requiring generally many coats of a fluoropolymer powder composition to be applied in order to achieve lmm to 2 mm (40 to 80 mils) of final fluoropolymer layer thickness.
  • the present disclosure provides for thicker fluoropolymer layer thicknesses in each individual pass or coating by improving the electrostatic properties of the fluoropolymer powder composition through incorporation of low amounts of "high-build agents".
  • the resulting fluoropolymer layer may have a thickness for each individual pass or coating that is greater than or equal to 10% thicker than a single pass coating thickness of a composition prepared without the at least one high-build agent, excluding the thickness of a primer layer between the substrate and the fluoropolymer layer.
  • the resulting fluoropolymer layers are substantially free of "high-build agents" once the fluoropolymer layer is fused to a substrate.
  • the fluoropolymer layers presently disclosed are substantially free of visible surface defects, such as bubbles, fibrils, or other negative affects to the coating appearance.
  • the term "high-build agent” as used herein means an organic compound that can be added to fluoropolymer particles in order to increase thickness of individual layers formed using the fluoropolymer particles.
  • the high-build agent may be selected from esters, amines, glycol ethers, amides, amine oxides, hydrocarbons, alcohols, ketones, fluorosurfactants, and combinations thereof.
  • Esters useful as the high- build agent in the presently disclosed compositions include propylene glycol monostearate, glycerol monostearate, glycerol monocaprylate, tributyrin, triacetin, and the like.
  • Amines useful as the high-build agent in the presently disclosed compositions include diethylene triamine, and the like.
  • Glycol ethers useful as the high-build agent in the presently disclosed compositions include polyethylene glycol dimethyl ether, polyethylene glycol, and the like.
  • Amides useful as the high-build agent in the presently disclosed compositions include N 5 N diethyl-m-toluamide, N,N-diethyldodecanamide, and the like.
  • Amine oxides useful as the high-build agent in the presently disclosed compositions include laurel dimethylamine oxide, and the like.
  • Hydrocarbons useful as the high-build agent in the presently disclosed compositions include octadecane, and the like.
  • Alcohols useful as the high-build agent in the presently disclosed compositions include 2,6,8-trimethyl-4-nonanol, and the like.
  • Ketones useful as the high-build agent in the presently disclosed compositions include 1,3 diphenylacetone, and the like.
  • Fluorosurfactants useful as the high-build agent in the presently disclosed compositions include cationic surfactants, ionic surfactants, non-ionic surfactants, and anionic surfactants.
  • Useful anionic surfactants include, but are not limited to, those with molecular structures comprising (1) at least one hydrophobic moiety, such as from about C6 - to about C20 -alkyl, alkylaryl, and/or alkenyl groups, (2) at least one anionic group, such as sulfate, sulfonate, phosphate, polyoxyethylene sulfate, polyoxyethylene sulfonate, polyoxyethylene phosphate, and the like, and/or (3) the salts of such anionic groups, wherein said salts include alkali metal salts, ammonium salts, tertiary amino salts, and the like.
  • Representative commercial examples of useful anionic surfactants include sodium lauryl sulfate, available under the trade designation "TEXAPON L-IOO" from Henkel Inc.,
  • non-ionic surfactants examples include polyethoxylated alkyl alcohols available under the trade designations "Brij 30" and “Brij 35” both available from ICI Americas, Inc., New Castle, Delaware, or available under the trade designation “Tergitol TMN-6 Specialty Surfactant” from Union Carbide Chemical and Plastics Co., Houston, Texas; polyethoxylated alkylphenols available under the trade designation “Triton X-IOO” from Union Carbide Chemical and Plastics Co., Houston, Texas, or under the trade designation “Iconol NP-70” from BASF Corp., Mount Olive, New Jersey; and polyethylene glycol/polypropylene glycol block copolymer available under the trade designations "Tetronic 1502 Block Copolymer Surfactant,” “Tetronic 908 Block Copolymer Surfactant” and “Pluronic F38 Block Copolymer Surfactant,” all from BASF, Corp., Mount Olive, New Jersey.
  • compositions are considered substantially free of high-build agents if they have less than 0.1 wt% of the high-build agent based on the total weight of the composition.
  • compositions presently disclosed include less than about 25 wt% high-build agent, in some embodiments less than about 10 wt% high-build agent, and even less than 2 wt% high-build agent. In some embodiments, the presently disclosed compositions include less than 1 wt% high-build agent based on the total weight of the composition. The presently disclosed compositions also include greater than 75 wt% fluoropolymer, greater than 85 wt% of fluoropolymer, and even greater than 95 wt% of fluoropolymer based on the total weight of the composition.
  • High-build agents should not be deliquescent, cause the powder to become too cohesive, or strongly hygroscopic at relative humidities of about 20%, in some embodiments about 30%, and in some embodiments above 30%, in order to avoid impairing the flow properties of the fluoropolymer powder. Furthermore, high-build agents should not be volatile or easily decomposed such that they volatilize or decompose before or during electrostatic spraying when they are needed to effectuate a high-build layer thickness.
  • the presently disclosed fluoropolymer particles are non-spherical, which means that they can have any shape other than a uniformly spherical shape.
  • the presently disclosed fluoropolymer particles include thermofluoroplastics, such as partially and perfluorinated fluoroplastics.
  • Thermofluoroplastics include, for instance, those having interpolymerized units of one or more fluorinated or perfluorinated monomers such as tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE), hexafluoropropylene (HFP), vinylidene fluoride (VDF), fluorovinyl ethers, perfluorovinyl ethers, as well as combinations of one or more of these.
  • fluorinated or perfluorinated monomers such as tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE), hexafluoropropylene (HFP), vinylidene fluoride (VDF), fluorovinyl ethers, perfluorovinyl ethers, as well as combinations of one or more of these.
  • Thermofluoroplastics may further include copolymers comprising one or more of the fluorinated or perfluorinated monomers in combination with one or more non-fluorinated comonomer such as ethylene, propylene, and other lower olefins (e.g., C2-C9 containing alpha-olef ⁇ ns).
  • comonomer such as ethylene, propylene, and other lower olefins (e.g., C2-C9 containing alpha-olef ⁇ ns).
  • polytetrafluoroethylene can be the thermofluoroplastic according to the present description.
  • PTFE polytetrafluoroethylene
  • it may be used as a blend with another fluoropolymer and may also contain a fluoropolymer filler (in the blend or in the PTFE only).
  • thermofluoroplastics also include those commercially available under the designations THV (described as a copolymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride), FEP (a copolymer of tetrafluoroethylene and hexafluoropropylene), PFA (a copolymer of tetrafluoroethylene and perfluorovinyl ether), HTE (a copolymer of tetrafluoroethylene, hexafluoropropylene, and ethylene), ETFE (a copolymer of tetrafluoroethylene and ethylene), ECTFE (a copolymer of chlorotrifluoroethylene and ethylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), polychlorotrifluoroethylene (CPTFE), as well as combinations and blends of one or more of these thermofluoroplastics.
  • thermofluoroplastics may further contain interpolymerized units of additional monomers, e.g., copolymers of TFE, HFP, VDF, ethylene, or a perfluorovinyl ether such as perfluoro(alkyl vinyl) ether (PAVE) and/or a perfluoro(alkoxy vinyl) ether (PAOVE). Combinations of two or more thermofluoroplastics may also be used. In some embodiments, thermofluoroplastics such as THV and/or ETFE and/or HTE are preferred.
  • thermofluoroplastics have stable end groups.
  • stable end group means reactively stable moieties at the end of a polymer chain, which may reduce formation of bubbles or voids in coatings prepared from compositions comprising thermofluoroplastics having stable end groups.
  • compositions described herein may also include one or more additional additives incorporated therein.
  • Additives include, but are not limited to, inert fillers, antioxidants, stabilizers, pigments, reinforcing agents, lubricants, flow additives, other polymers, and the like.
  • further additives include metals and metal oxides such as, for instance, chromium oxide, chromium, zinc oxide, copper oxide, copper, nickel, titanium, stainless steel, aluminum, titanium dioxide, tin oxide, iron, iron oxide, and the like.
  • Such metals may serve, for instance, as abrasion-resistant fillers or as compatibilizers.
  • polymeric additives such as polyphenylene sulfide resin (PPS), epoxy resins, polyether sulfones, polyamide imide, polyetherether ketones, and combinations thereof.
  • PPS polyphenylene sulfide resin
  • abrasion-resistant fillers include, for example, ceramics, high temperature and/or abrasion-resistant polymers, and the like.
  • Exemplary antioxidants include polyphenylene sulfide resin (commercially available under the trade designation "RYTON Vl” from Chevron Phillips Chemical, Texas, USA).
  • Flow additives are, generally, materials known to improve wetting and flow of polymer compositions (including low molecular weight materials, oligomers, polymers, and combinations thereof). Flow additives may, for instance, be selected from low viscosity materials and materials that are not compatible with the fluoropolymer (e.g., hydrocarbon polymers such as polyacrylates). In some embodiments, the compositions are substantially free of polymers other than the fluoroplastic or combination of fluoroplastics described above. That is, the compositions may include less than 25 wt% of a polymer additive, less than 10 wt%, less than 5% of a polymer additive, or even no polymer additive.
  • the present description provides multi-layer articles comprising a substrate and a coating.
  • the substrate may comprise a substantially organic material or a substantially inorganic material.
  • the substantially organic material may optionally be essentially free of a phenolate or thiolate salt.
  • the coating of the multi-layer articles comprises a fluoropolymer that may be substantially free of fluoroelastomer. That is, the layer that comprises the fluoropolymer may contain less than about 10% by weight of fluoroelastomer, less than 5% by weight, less than 1% by weight, less than 0.5% by weight, or even no fluoroelastomer.
  • the substantially inorganic substrate can be, for example, glass, ceramic, metal, iron, stainless steel, steel, aluminum, copper, nickel, and alloys and combinations thereof.
  • the substrate is selected from metal substrates.
  • suitable substrates include fluoropolymers, nylon, polyamide, and the like.
  • the substrate shape is not particularly limited.
  • the substrate can be the surface of a fiber, a flake, a particle, or combinations thereof.
  • Specific examples include metallic sheeting in the form of ductwork such as is useful in exhaust ducts for chemical or semiconductor operations.
  • Other exemplary substrates include interior surfaces of chemical process equipment such as chemical vessels, pipes, valves, pumps and the like.
  • the multi-layer articles disclosed herein may also include a primer layer between the substrate and the fluoropolymer composition layer(s).
  • the primer layer may include a fluoropolymer based primer.
  • a fluoropolymer based primer useful in the present disclosure includes at least 90 wt% of a copolymer of PFA and FEP based on the total weight of the primer.
  • the primer layer thickness in the multi-layer articles presently disclosed may range from about 0.08 mm (3 mils) to about 0.20 mm (8 mils).
  • the present description provides a method for powder coating a substrate including the steps of: (a) blending fluoropolymer particles with at least one high-build agent to create a composition; (b) electrostatically spraying the composition onto a substrate resulting in a single pass composition layer thickness greater than or equal to 10% thicker than a single pass coating thickness of a composition prepared without at the least one high-build agent, excluding the thickness of a primer layer between the substrate and the fluoropolymer layer; (c) heating the substrate to a temperature sufficient to fuse the composition layer to the substrate.
  • the fluoropolymer particles may be provided is granular or powder form.
  • heating may be provided by an oven or other such heat source.
  • the coating compositions are heated to a temperature of equal to or greater than 200 0 F, 300 0 F, 400 0 F, 500 0 F, 600 0 F or even 700 0 F.
  • the coating compositions are heated to a temperature of equal to or greater than 570 0 F.
  • the coating compositions are heated to a temperature of equal to or greater than 750 0 F.
  • the high-build agent is provided in liquid form to the balance of the composition.
  • the high-build agent may be dissolved in a solvent and the method may further comprise mixing the solvent containing the high- build agent with the fluoropolymer particles before heating the composition.
  • the high-build agent is added in dry form to the fluoropolymer particles (i.e., granules or powder) and high shear blended to coat the fluoropolymer particles with the high-build agent.
  • application of the composition to the substrate includes a method selected from, for example, electrostatic powder coating, co-extruding the composition and the substrate, and applying the composition to the substrate as a film, sheet, or molded part.
  • a primer layer may be applied before applying the remainder of the composition as described herein.
  • Various embodiments of the present invention are useful in chemical process equipment, such as chemical storage tanks, pipes, valves, and the like; exhaust duct coatings; biomedical devices; electronic materials; cookware and bakeware; and architectural coatings, to name a few applications.
  • high-build agents were analyzed for use in coating compositions. These high-build agents were added to fluoropolymer particles made from two different thermofluoroplastics. Controls were established for fluoropolymer particles made from each thermofluoroplastic, where the controls contained no high-build agents. Each sample was tested for thickness of the coating composition layer without back ionization and/or bubbling in the coating. Primer only panels were prepared for use in evaluating the various coating composition layers.
  • the primer only panels were grit blasted, mild steel that were sprayed with a PFA thick film primer with a target primer layer thickness range of 0.10 mm to 0.13 mm and an actual primer layer thickness of 0.08 mm to 0.15 mm. These panels were sprayed horizontally and baked for 20 minutes at 730 0 F, then cooled and the composition coating layer thickness was measured. The primer only panels had some pitting back ionization in the coating, which is common when the PFA thick film primer coating is over about 0.08 mm. The coating compositions were put into a 21% humidity chamber for at least 24 hours before being sprayed. A single panel, hanging vertically, was sprayed for each coating composition.
  • the coating composition layer thickness was gradually increased from the top of the panel to the bottom of the panel with the thickest coating composition layer at the bottom of the panel. Spraying was stopped when back ionization occurred. The back ionization that occurred was either bumps, pitting or starring in the coating composition layer before fusing.
  • the panels were baked for 20 minutes at 730 0 F. The panels were cooled after which the total composition coating layer thickness was measured using a coating thickness gage commercially available under the trade designation "PosiTector 6000", from DeFelsko Corporation, Ogdensburg, New York, and recorded. The point at which bubbling in the composition coating layer occurred was also measured and recorded.
  • the data for Examples 1-12 and CE 1-6 is summarized in Table I below.
  • the "Build” column reports the coating composition layer thickness at which no bubbles were noticed after baking or fusing excluding the primer layer thickness of each panel in order provide a defect free build thickness for only the coating composition layer containing the various high-build agents.
  • the "Back Ionization” column represents the type of back ionization observed at which point spraying of the panel was stopped.
  • the primer only panels were grit blasted, mild steel that were sprayed with a ETFE based primer with a target primer layer thickness ranging from 0.13 mm to 0.15 mm and an actual primer layer thickness of 0.16 mm to 0.20 mm. These panels were sprayed horizontally and baked for 20 minutes at 572 0 F, then cooled and the coating composition layer thickness was measured and recorded. The coating compositions were placed in a 21% humidity chamber for 18 to 25 hours before being sprayed. A single panel, hanging vertically, was sprayed for each coating composition. The coating composition layer thickness was gradually increased from the top of the panel to the bottom of the panel with the thickest coating composition layer at the bottom of the panel.
  • Spraying was stopped when back ionization occurred.
  • the type of back ionization observed in this evaluation was starring with no bumps or pitting.
  • the panels were baked for 20 minutes at 572 0 F.
  • the panels were cooled after which the total composition coating layer thickness was measured using a coating thickness gage commercially available under the trade designation "PosiTector 6000", from DeFelsko Corporation, Ogdensburg, New York, and recorded. The point at which bubbling in the composition coating layer occurred was also measured and recorded.
  • Examples 13-21 and CE 7 is summarized in Table II below.
  • the "Build” column reports the coating composition layer thickness excluding the primer layer thickness of each panel in order provide a defect free build thickness for only the coating composition layer containing the various high-build agents.
  • the "Back Ionization” column represents the type of back ionization observed at which point spraying of the panel was stopped.
  • Example 1 A coating composition was prepared by mixing 1 wt% of triacetin with 98 wt% of
  • PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I . All weight percents are based on the total weight of the coating composition.
  • the coating composition was mixed using a mixer commercially available from Waring Commercial, Torrington, Connecticut, which is similar to a mixer available under the trade designation "Henschel FM High Intensity Mixer'Trom Henschel-Mixer Services, Green Bay, Wisconsin, and that was scaled down to make 100 g batches.
  • the mixer was run with a 40 m/second tip speed up to a target mix temperature of 50 0 C. It took about 2 to 3 minutes of mixing on low, at a 60% setting on a variac, to reach the 50 0 C target mix temperature.
  • the coating composition was not sieved before being sprayed on a panel according to the method described above.
  • the data for Example 1 is shown in Table I below.
  • Example 2 was prepared and mixed as Example 1 except 1 wt% of octadecane rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I .
  • the data for Example 2 is shown in Table I below.
  • Example 3
  • Example 3 was prepared and mixed as Example 1 except 1 wt% of diethylene triamine rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I.
  • the data for Example 3 is shown in Table I below.
  • Example 4 was prepared and mixed as Example 1 except 1 wt% of tributyrin rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I .
  • the data for Example 4 is shown in Table I below.
  • Example 5 was prepared and mixed as Example 1 except 1 wt% of propylene glycol rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I .
  • the data for Example 5 is shown in Table I below.
  • Example 6 was prepared and mixed as Example 1 except 1 wt% of propylene glycol monostearate rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I.
  • the data for Example 6 is shown in Table I below.
  • Example 7 was prepared and mixed as Example 1 except 1 wt% of N 5 N diethyl-m- toluamide rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I .
  • the data for Example 7 is shown in Table I below.
  • Example 8 was prepared and mixed as Example 1 except 1 wt% of laurel dimethylamine oxide rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I.
  • the data for Example 9 is shown in Table I below.
  • Example 9 was prepared and mixed as Example 1 except 1 wt% of glycerol monocaprylate rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I.
  • the data for Example 9 is shown in Table I below.
  • Example 10 was prepared and mixed as Example 1 except 1 wt% of PEG-200 rather than 1 wt % of triacetin was added to 98 wt% of PFA thermofluoroplastic particles along with 1 wt% of Ryton V-I .
  • the data for Example 10 is shown in Table I below.
  • Comparative Example 1 was prepared and mixed as Example 1 except 99 wt% of PFA thermofluoroplastic particles was mixed with 1 wt% of Ryton V-I and there was no high-build agent added to the composition.
  • the data for Comparative Example 1 is shown in Table I below.
  • a coating composition was prepared by mixing 0.7 wt% of 1,3 diphenylacetone and 99.3 wt% of ETFE thermofluoroplastic particles. All weight percents are based on the total weight of the coating composition.
  • the coating composition was mixed using a mixer commercially available from Waring Commercial, Torrington, Connecticut, which is similar to a mixer available under the trade designation "Henschel FM High Intensity Mixer”from Henschel-Mixer Services, Green Bay, Wisconsin, and was scaled down to make 100 g batches. The mixer was run with a 40 m/second tip speed up to a target mix temperature of 80 0 C.
  • Example 11 It took about 3 to 6 minutes of mixing on low, at a 60% setting on a variac, to reach the 80 0 C target mix temperature. These coating compositions were not sieved before being sprayed on a panel according to the method described above. The data for Example 11 is shown in Table II below.
  • Example 12 was prepared and mixed as Example 11 except 0.7 wt% of propylene glycol rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.3 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 12 is shown in Table II below.
  • Example 13 was prepared and mixed as Example 11 except 0.7 wt% of propylene glycol monostearate rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.3 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 13 is shown in Table II below.
  • Example 14 was prepared and mixed as Example 11 except 0.7 wt% of diethymetatoluamide rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.3 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 14 is shown in Table II below.
  • Example 15
  • Example 15 was prepared and mixed as Example 11 except 0.7 wt% of N 5 N- diethyldodecanamide and 0.1 wt% of FC-4432 rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.2 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 15 is shown in Table II below.
  • Example 16 was prepared and mixed as Example 11 except 0.7 wt% of N 5 N- diethyldodecanamide rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.3 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 16 is shown in Table II below.
  • Example 17 was prepared and mixed as Example 11 except 0.7 wt% of TMN IOOX rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.3 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 18 is shown in Table II below.
  • Example 18 was prepared and mixed as Example 11 except 0.7 wt% of glycerol monostearate rather than 0.7 wt % of 1,3 diphenylacetone was added to 99.3 wt% of ETFE thermofluoroplastic particles.
  • the data for Example 18 is shown in Table II below.
  • Comparative Example 2 was prepared and mixed as Example 13 except 100 wt% of ETFE thermofluoroplastic particles was used with no high-build agent added to the composition.
  • the data for Comparative Example 2 is shown in Table II below. Table II

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Abstract

L'invention porte sur des compositions de revêtement ayant au moins 75 % en poids de particules de polymère fluoré sur la base du poids total de la composition, et au moins un agent à pouvoir garnissant élevé, le ou les agents à pouvoir garnissant élevé étant choisis de telle sorte que la composition conduise à une épaisseur de revêtement en une seule passe qui soit de 10 % ou plus élevé qu'une épaisseur de revêtement en une seule passe d'une composition préparée sans le ou les agents à pouvoir garnissant élevé. L'invention porte également sur un procédé pour le revêtement pulvérulent d'un substrat par de telles compositions de revêtement ; et sur des articles multicouches créés par ce procédé.
PCT/US2009/063783 2008-12-19 2009-11-10 Revêtement pulvérulent de polymère fluoré en film épais Ceased WO2010080202A1 (fr)

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US13937408P 2008-12-19 2008-12-19
US61/139,374 2008-12-19

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Cited By (2)

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US9920219B2 (en) 2015-06-22 2018-03-20 Awi Licensing Llc Soil and dirt repellent powder coatings
US10479067B2 (en) 2015-04-01 2019-11-19 3M Innovative Properties Company Multilayer articles comprising a release surface and methods thereof

Citations (2)

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US6287632B1 (en) * 1999-02-24 2001-09-11 Dupont Mitsui Flurochemical Rotolining process using fluoro polymer powder
US6551708B2 (en) * 1995-12-18 2003-04-22 Daikin Industries, Ltd. Powder coating composition containing vinylidene fluoride copolymer and methyl methacrylate copolymer

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US6551708B2 (en) * 1995-12-18 2003-04-22 Daikin Industries, Ltd. Powder coating composition containing vinylidene fluoride copolymer and methyl methacrylate copolymer
US6803419B2 (en) * 1995-12-18 2004-10-12 Daikin Industries, Ltd. Method for preparing a powder coating composition
US6287632B1 (en) * 1999-02-24 2001-09-11 Dupont Mitsui Flurochemical Rotolining process using fluoro polymer powder

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10479067B2 (en) 2015-04-01 2019-11-19 3M Innovative Properties Company Multilayer articles comprising a release surface and methods thereof
US9920219B2 (en) 2015-06-22 2018-03-20 Awi Licensing Llc Soil and dirt repellent powder coatings
US10696864B2 (en) 2015-06-22 2020-06-30 Awi Licensing Llc Soil and dirt repellent powder coatings
US11667812B2 (en) 2015-06-22 2023-06-06 Awi Licensing Llc Soil and dirt repellent powder coatings
US12122934B2 (en) 2015-06-22 2024-10-22 Awi Licensing Llc Soil and dirt repellent powder coatings

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