[go: up one dir, main page]

EP0847427A1 - Peinture pulverulente et son utilisation en revetement interieur de recipients d'emballage - Google Patents

Peinture pulverulente et son utilisation en revetement interieur de recipients d'emballage

Info

Publication number
EP0847427A1
EP0847427A1 EP96930968A EP96930968A EP0847427A1 EP 0847427 A1 EP0847427 A1 EP 0847427A1 EP 96930968 A EP96930968 A EP 96930968A EP 96930968 A EP96930968 A EP 96930968A EP 0847427 A1 EP0847427 A1 EP 0847427A1
Authority
EP
European Patent Office
Prior art keywords
powder coating
particle size
particles
phenolic
powder
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
EP96930968A
Other languages
German (de)
English (en)
Inventor
Leonidas Kiriazis
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.)
PPG Industries Ohio Inc
Original Assignee
PPG Industries Inc
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 PPG Industries Inc filed Critical PPG Industries Inc
Publication of EP0847427A1 publication Critical patent/EP0847427A1/fr
Ceased legal-status Critical Current

Links

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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/182—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing using pre-adducts of epoxy compounds with curing agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/62—Alcohols or phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/62—Alcohols or phenols
    • C08G59/621—Phenols

Definitions

  • the present invention relates to powder coatings, in particular for the interior coating of packaging containers, based on epoxy resins and phenolic hardeners, and a
  • the present invention also relates to a method for
  • Packaging containers such as cans, two and three-piece beverage cans u. ⁇ ., Are provided on the inside with a coating, on the one hand to protect the contents from being impaired by detached components of the metal sheet, and on the other hand to avoid corrosion of the metal sheet by aggressive contents.
  • thermosetting powder coatings for covering weld seams in metal containers which are used to hold food or beverages.
  • These thermosetting powder coatings contain as binder a mixture of an aromatic epoxy resin with an average of a maximum of 2 epoxy groups per molecule and an aromatic epoxy resin with an average of more than 2 epoxy groups per molecule.
  • the condensation product of the diglycidyl ether of bisphenol A with bisphenol A with an equivalent weight of 220 to 280 based on phenolic hydroxyl groups or an acidic polyester or a mixture thereof is used as the hardener.
  • EP-B-119164 neither contains instructions on how to use these powder coatings for the interior coating of packaging containers, nor does it contain instructions on how to modify these powder coatings for use as internal protective coatings. In particular, EP-B-119 164 does not contain any information about particle sizes and particle size distributions of the powder coating materials. However, the use of these powder coatings of EP-B-119 164 with a particle size distribution customary for powder coatings leads to coatings which have too high a porosity in the case of the small layer thicknesses _ ⁇ 15 ⁇ m which are customary for interior coatings.
  • DE-PS 23 12 409 heat-curable, solvent-containing and solvent-free coating compositions for the coating of automobile bodies, machines, systems and containers are known, which consist of an epoxy resin with more than one 1,2-epoxy group per molecule and a polyol with more than a phenolic OH group per molecule and other conventional auxiliaries and additives.
  • DE-PS 23 12409 a powder coating with a particle size of at most 0.044 mm in a dry film layer thickness of 25 ⁇ m is applied for the production of automotive cover sheets. Neither the particle size nor the particle size distribution of the powder coating particles is described for powder coating materials which are suitable for the production of interior coatings for packaging containers.
  • DE-PS 23 12 409 also contains no indication that the particle size and particle size distribution can be set in a targeted manner depending on the application of the powder coating materials. Powder coatings with a maximum particle size of 44 ⁇ m and a usual particle size distribution are, however, unsuitable for the production of interior coatings for packaging containers with the usual low layer thickness _ ⁇ _ 15 ⁇ m, since the resulting coatings have too high a porosity.
  • a disadvantage of the powder coatings described in US Pat. No. 3,962,486 is that which is caused by the use of amine hardeners insufficient sterilization resistance of the resulting coatings.
  • Another disadvantage is that epoxy resins cured with amines tend to become brittle and have very poor elasticities. Acid anhydride hardeners have the disadvantage that they are highly irritating and special precautions are therefore necessary when formulating the powder coatings.
  • powder coatings for the internal coating of cans are known from US Pat. No. 4,183,974, which also contain an epoxy resin and an amine hardener. These powder coatings have average particle sizes between 1 and 100 ⁇ m, preferably between 1 and 10 ⁇ m. Although the resulting coatings already have the required low porosity at layer thicknesses of ⁇ _ 13 ⁇ m, the resistance to sterilization of the resulting coatings in turn needs to be improved. Another disadvantage is that epoxy resins cured with amines tend to become brittle and have very poor elasticities.
  • German patent application P 40 38 681.3 discloses powder coatings based on epoxy resins which, when the particle size distribution of the powder coating particles is set appropriately, are suitable both for coating the inside of packaging containers and for covering weld seams. These powder coatings contain polyester containing carboxyl groups as hardener. The use of phenolic hardeners is not described in this patent application.
  • the present invention is therefore based on the object of providing powder coatings which, when used for the inner coating of packaging containers, also meet the requirements which are usually placed on inner coatings of cans even when applied with small layer thicknesses of ⁇ _ 15 ⁇ m.
  • these inner coatings should not be porous (determined with the aid of the so-called enamel rater test), show good adhesion to the substrate, have high elasticity and be stable under the usual pasteurization and sterilization conditions.
  • the powder coatings should be able to be hardened during the short drying times customary for can coating.
  • This object is surprisingly achieved by a powder coating based on epoxy resins and phenolic hardeners, in particular for the interior coating of packaging containers
  • Groups from 100 to 500,
  • the powder coating has a particle size distribution such that a) at least 90 percent by mass of the powder coating particles have a particle size between 1 and 60 ⁇ m,
  • the maximum particle size for at least 99 percent by mass of the powder coating particles is ⁇ _ 100 ⁇ m
  • the average particle size of the powder coating particles is between 5 and 20 ⁇ m and
  • the invention relates to methods for the inner coating of packaging containers, in which these powder coatings are applied.
  • the invention also relates to the use of the powder coating materials for the interior coating of packaging containers.
  • the powder coatings according to the invention can be hardened quickly, are easy to handle and easy to apply, have good processing speed, good flexibility and transparency after coating.
  • the powder coatings according to the invention are distinguished in that coatings with only a very small layer thickness of j ⁇ 15 ⁇ m have the properties required by the can manufacturers for interior coatings. In particular, these coatings have the required low porosity even with a small layer thickness of ⁇ 15 ⁇ m.
  • these coatings are characterized by good adhesion, high flexibility and good resistance to pasteurization and sterilization.
  • the epoxy resins used in the powder coating materials of the invention are solid epoxy resins with an epoxy equivalent weight of 300 to 5500.
  • Aromatic, aliphatic and / or cycloaliphatic epoxy resins are suitable.
  • Aromatic epoxy resins based on bisphenol-A and / or bisphenol-F and / or epoxy resins of the novolak type are preferably used.
  • Epoxy resins based on bisphenol-A or bisphenol-F used with particular preference have an epoxy equivalent weight of 500 to 2000.
  • Novolak-type epoxy resins used with particular preference have an epoxy equivalent weight of 500 to 1000.
  • Epoxy resins based on bisphenol-A or bisphenol-F generally have a functionality of at most 2 and epoxy resins of the novolak type generally have a functionality of at least 2.
  • the epoxy resins based on bisphenol-A or bisphenol-F can also be brought to a functionality of more than 2 by branching, for example by means of trimethylolpropane, glycerol, pentaerythritol or other branching reagents.
  • branching for example by means of trimethylolpropane, glycerol, pentaerythritol or other branching reagents.
  • other epoxy resins such as, for example, alkylene glycol diglycidyl ether or their branched secondary products
  • epoxy resins based on bisphenol A or F oa which have been flexibilized with alkylene glycols can also be used. Mixtures of various of the epoxy resins mentioned are also suitable.
  • Suitable epoxy resins are, for example, the following
  • AralditR GT 6064, GT 7072, GT 7203, GT 7004, GT 7304, GT 7097 and GT 7220 from Ciba Geigy.
  • All solid compounds with more than one phenolic OH group, preferably 1.8 to 4, particularly preferably j ⁇ 3, very particularly preferably 1.8 to 2.2 phenolic OH groups per molecule and a hydroxyl equivalent weight are suitable as hardener components , based on phenolic OH groups, from 100 to 500, preferably 200 to 300.
  • a particularly preferred hardener is the condensation product of the diglycidyl ether of bisphenol-A or bisphenol-F with bisphenol-A or bisphenol-F, in particular the condensation product with an equivalent weight of 220 to 280 based on phenolic hydroxyl groups.
  • These condensation products are usually prepared by reaction of generally excess bisphenol with a bisphenol digiycidyl ether in the presence of a suitable catalyst.
  • the condensation product is preferably produced by reacting the Diglycidyl ether with the bisphenol in a weight ratio of 0.5 to 2.
  • These hardeners based on these condensation products of the bisphenol diglycidyl ether with a bisphenol generally have a functionality of at most 2, it being possible in turn to set higher functionalities by using branching reagents .
  • reaction products of bisphenols with epoxy resins of the novolak type are also suitable as hardeners.
  • These hardeners are preferably obtained by reacting the epoxy resin with the bisphenol in a weight ratio of 0.5 to 2 in the presence of a suitable catalyst.
  • A is a divalent hydrocarbon radical with 1 to 6 carbon atoms or the radicals
  • X is a hydrogen or alkyl having 1 to 4 carbon atoms n an average value of 1 to 9, preferably 2 to 7 and y assumes a value of 0 or 1.
  • the phenolic hardeners described in DE-OS 3027 140 can also be used.
  • hardeners modified with branching reagents and / or flexible hardeners are also suitable. Mixtures of different hardeners mentioned can also be used. FDA-approved hardeners are preferred.
  • the epoxy resin component is usually used in the powder coatings according to the invention in an amount of 29 to 80% by weight, preferably 39 to 60% by weight, in each case based on the total weight of the powder coating.
  • the hardener component is usually used in the powder coatings according to the invention in an amount of 10 to 50% by weight, preferably 15 to 40% by weight, in each case based on the total weight of the powder coating.
  • the powder coatings according to the invention contain at least one curing catalyst, usually in an amount of 0.01 to 5.0% by weight, preferably 0.05 to 2.0% by weight, in each case based on the total weight of the powder coating.
  • the catalyst is imidazole, 2-methylimidazole, ethyltriphenylphosphonium chloride or another salt thereof, a quinoline derivative, as described for example in EP-B-10805, a primary, secondary or tertiary aminophenol, aluminum acetylacetonate or a toluenesulfonic acid salt or a mixture of different salts Catalysts.
  • the commercially available curing agents containing hydroxyl groups usually already contain a curing catalyst.
  • Examples of such commercially available hydroxyl group-containing hardeners which are preferably used are the products which are commercially available under the following names: DEH R 81, DEH R 82 and
  • the powder coatings according to the invention can also contain 0 to 55% by weight, preferably 15 to 25% by weight, of fillers.
  • FDA-approved fillers are preferred.
  • inorganic fillers e.g. titanium dioxide, e.g. Kronos 2160 from Kronos Titan, Rutil R 902 from Du Pont and RC 566 from Sachtleben, barium sulfate and silicate-based fillers such as Talc, kaolin, magnesium aluminum silicates, mica etc. used. Titanium dioxide and fillers of the quartz sand type are preferably used.
  • the powder coating materials of the invention may optionally contain from 0.01 to 10% by weight, preferably 0.1 to 2% by weight, based on the total weight of the powder coating material, of further auxiliaries and additives.
  • auxiliaries and additives examples include leveling agents, flow aids, deaerating agents, such as e.g. Benzoin, pigments, etc.
  • the maximum particle size of the powder coating particles is ⁇ ⁇ 100 ⁇ m, preferably _ ⁇ 60 ⁇ m and particularly preferably ⁇ 40 for at least 99% by mass of the particles OK
  • the average particle size of the powder coating particles is between 5 to 20 ⁇ m, particularly preferably between 5 to 12 ⁇ m. Furthermore, it is essential to the invention that when the powder coating materials are used for the inner coating of the packaging containers, the grain size distribution is adjusted so that the slope S of the grain distribution curve at the turning point is> 100, preferably> 150 and particularly preferably> 200. To achieve coatings with particularly good properties, powder coatings are very particularly preferably used in which the slope S of the grain size distribution curve is _> 300 at the turning point.
  • the slope S is defined as the limit for f (x2) - f ( ⁇ l) towards zero of (ffe) - f ( x l)) / lg (( x 2 / ⁇ l)) at the point of inflection of the grain distribution curve.
  • the grain distribution curve represents the plot of the cumulative mass percent (f (x)) against the absolute grain diameter (x), the grain diameter being shown on a logarithmic scale and the cumulative mass percent on a linear scale.
  • Powder coatings which have only a small proportion of very fine particles (particle size ⁇ 5 ⁇ m) and at the same time only a very small proportion of coarse-particle powder coating particles (particle size> 25 ⁇ m) are therefore particularly suitable for use as the inner coating of packaging containers, i.e. a have as narrow a grain size distribution as possible.
  • the respective particle size distribution of the powder coating is adjusted using suitable grinding units, if necessary in combination with suitable viewing and screening devices, e.g. With
  • Fluidized bed jet mills from Alpine, Augsburg, in Combination with Turboplex fine classifiers from Alpine, Augsburg.
  • lubricants are also essential to the invention. According to the invention, this is added in amounts of less than 2% by weight. Additions of less than 1% by weight are preferred. The range from 0.1 to 0.6% by weight has proven itself best. Propylene waxes, modified polyethylene waxes and acid amides are used as lubricants.
  • the propylene waxes are preferably used in micronized form.
  • Such waxes include under the name Hoechst-Wachs pp. 230, Hoechst-Wachs C, Hoechst-Wachs C micropowder PM and Hoechst-Wachs R 31 commercially available.
  • the polyethylene waxes are generally waxes modified with polytetrafluoroethylene. These are commercially available available under the names Hoechst-Wachs PED 121, 191, 136, 153, 261, 521, 522, as well as Hostalup H 12 and Hostalup H 22.
  • Acid amides which can be used according to the invention include, in particular, erucic acid amide and oleic acid amide.
  • the addition of the lubricants according to the invention achieves surprising, unexpected properties, in particular when using the powder coatings for the interior coating of packaging containers.
  • the paints obtained are very flexible, surface-scratch-resistant.
  • the corrosion protection properties are also improved.
  • the material according to the invention has excellent transparency as a coating.
  • the powder coatings are produced by the known methods (see, for example, product information from BASF Lacke + Weg 80 AG, "Pulverlacke", 1990) by homogenizing and dispersing, for example using an extruder, screw kneader, etc. It is essential to the invention that the powder coatings their production can be adjusted to a grain size distribution adapted to the intended use by grinding and, if appropriate, by classifying and sieving.
  • the lubricant is preferably extruded and ground together with the powder coating.
  • particularly good property profiles can be achieved by this procedure.
  • Other ways of wedging may be followed by sifting and application using corona systems or tribocharging.
  • the result of a powder coating that has been produced and applied in the manner described is a surprisingly high matting, surface hardness, flexibility and improved adhesion.
  • the packaging containers which are coated with the powder coatings according to the invention can consist of a wide variety of materials, have a wide variety of sizes and shapes and have been produced by various processes.
  • metallic containers are coated with the powder coatings according to the invention. These metal containers may have been made by first rolling metal sheet and then joining it by perishing. The end pieces can then be attached to the resulting cylinder.
  • the powder coatings according to the invention are used for internal coating of the can bodies, which generally already have a bottom.
  • deep-drawn metal containers can also be coated on the inside with the powder coatings according to the invention.
  • the powder coatings are also suitable for coating can lids and can bottoms.
  • the packaging containers can consist of a wide variety of materials, such as aluminum, black plate, tin plate and various iron alloys, which may be provided with a passivation layer based on nickel, chromium and tin compounds.
  • Containers of this type are usually used as containers for food and beverages, for example for beer, juices, lemonades, soups, vegetables, meat dishes, fish dishes, vegetables, but also e.g. for animal feed.
  • the application is carried out according to known methods, such as are described, for example, in US Pat. No. 4,183,974.
  • the powder coating particles are electrostatically charged by friction (triboelectricity).
  • the powder coating particles are applied using special spray heads known to those skilled in the art.
  • the powder coatings according to the invention can also be applied by the known method of electrostatic support.
  • the powder coatings are usually applied in a layer thickness _ ⁇ 15 ⁇ m, preferably from 10 to 14 ⁇ m.
  • the coatings meet the requirements usually placed on such films.
  • the powder coatings can also be applied in higher layer thicknesses.
  • the packaging container the inside of which has been provided with the powder coating according to the invention, is then subjected to a heat treatment in order to harden the powder coating.
  • This heat treatment can be done in different ways.
  • the containers are often transported through a continuous furnace.
  • the powder coatings generally cure completely at object temperatures between 230 and 350 ° C. within a time of 5 to 30 s.
  • the continuous furnace can be operated at a constant temperature or have a temperature profile that is set according to the respective circumstances.
  • the invention is now explained in more detail below with the aid of exemplary embodiments. All information on parts and percentages are weight information unless expressly stated otherwise.
  • the powder coatings were produced by weighing all the constituents in cans, premixing in a premixer, homogenizing at 60 to 80 ° C. using an extruder, cooling as quickly as possible and adjusting to the desired particle size distribution using grinding units.
  • This powder mixture is extruded and ground together with erucic acid amide. In two experiments, an amount of 0.2% by weight and 0.5% by weight was added.
  • the maximum particle size for at least 99 percent by mass of the particles is ⁇ 100 ⁇ m, the average particle size is 9 ⁇ m.
  • the slope S at the inflection point of the grain distribution curve is 250.
  • the result shows that the powder coating without erucic acid amide breaks when it is punched (brittle) and takes on a milky appearance.
  • the powder coating with 0.2% lubricant is very flexible, can be punched well, but shows a milky appearance with 2% lactic acid. With 0.5% lubricant there are no complaints of this kind.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Epoxy Resins (AREA)

Abstract

L'invention concerne une peinture pulvérulente à base de résines époxy et de durcisseurs phénoliques, s'utilisant notamment pour le revêtement intérieur de récipients d'emballage, qui contient 1) au moins une résine époxy d'un poids équivalent en époxy compris entre 300 et 5500 et au moins un durcisseur comportant plus d'un groupe hydroxyle phénolique par molécule et un poids équivalent en hydroxyle compris entre 100 et 500, par rapport aux groupes OH phénoliques; la peinture pulvérulente présentant une répartition granulométrique telle a) qu'au moins 90 % en poids des particules de peinture pulvérulente présentent une dimension particulaire comprise entre 1 et 60 νm, b) que la dimension particulaire maximale des particules de peinture pulvérulente soit « 100 νm pour au moins 99 % en poids des particules, c) que la dimension particulaire moyenne des particules de peinture pulvérulente soit comprise entre 5 et 20 νm et d) que la pente de la courbe de répartition granulométrique soit » 100 au point d'inflexion et 2) un lubrifiant, de préférence dans un volume « 2 %.
EP96930968A 1995-08-28 1996-08-27 Peinture pulverulente et son utilisation en revetement interieur de recipients d'emballage Ceased EP0847427A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19531585 1995-08-28
DE19531585A DE19531585A1 (de) 1995-08-28 1995-08-28 Pulverlack und dessen Verwendung zur Innenbeschichtung von Verpackungsbehältern
PCT/EP1996/003769 WO1997008257A1 (fr) 1995-08-28 1996-08-27 Peinture pulverulente et son utilisation en revetement interieur de recipients d'emballage

Publications (1)

Publication Number Publication Date
EP0847427A1 true EP0847427A1 (fr) 1998-06-17

Family

ID=7770566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96930968A Ceased EP0847427A1 (fr) 1995-08-28 1996-08-27 Peinture pulverulente et son utilisation en revetement interieur de recipients d'emballage

Country Status (8)

Country Link
EP (1) EP0847427A1 (fr)
JP (1) JPH11511490A (fr)
KR (1) KR19990044235A (fr)
CN (1) CN1198767A (fr)
BR (1) BR9610296A (fr)
CA (1) CA2226956A1 (fr)
DE (1) DE19531585A1 (fr)
WO (1) WO1997008257A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829790A1 (de) * 1998-07-03 2000-01-05 Gkn Automotive Ag Pulverlack
DE10029548C2 (de) * 2000-06-15 2002-07-04 Basf Coatings Ag Selbstvernetzender Pulverlack auf der Basis von Epoxidharzen und seine Verwendung
DE10152829A1 (de) * 2001-10-25 2003-05-15 Basf Coatings Ag Pulverförmiger Beschichtungsstoff und funktionale Beschichtungen für hohe Dauergebrauchstemperaturen
ATE419293T1 (de) * 2005-07-11 2009-01-15 Akzo Nobel Coatings Int Bv Pulverbeschichtungsmaterialien
CN101709195A (zh) * 2009-12-25 2010-05-19 广州擎天实业有限公司 一种用于电木板涂装的纯环氧型粉末涂料及其制备方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038681A1 (de) * 1990-12-05 1992-06-11 Basf Lacke & Farben Pulverlack und dessen verwendung zur innenbeschichtung von verpackungsbehaeltern und zur schweissnahtabdeckung
DE4204266C2 (de) * 1992-02-13 1996-04-18 Basf Lacke & Farben Pulverlack und Verfahren zur Innenbeschichtung von Verpackungsbehältern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9708257A1 *

Also Published As

Publication number Publication date
DE19531585A1 (de) 1997-03-06
JPH11511490A (ja) 1999-10-05
WO1997008257A1 (fr) 1997-03-06
BR9610296A (pt) 1999-03-16
CA2226956A1 (fr) 1997-03-06
CN1198767A (zh) 1998-11-11
MX9801566A (es) 1998-05-31
KR19990044235A (ko) 1999-06-25

Similar Documents

Publication Publication Date Title
EP0560792B1 (fr) Vernis en poudre et utilisation de ce vernis pour le revetement interieur de recipients d'emballage et la couverture de cordons de soudure
EP0858471B1 (fr) Dispersions aqueuses de peinture en poudre
EP0119164B1 (fr) Revêtement en poudre duroplastique et son utilisation pour le revêtement de soudure
EP0626001B1 (fr) Vernis en poudre et son utilisation pour l'enduction interieure de recipients d'emballage
DE69200390T2 (de) Pulverbeschichtung ein Harz, ein Vernetzungsmittel und Zink enthaltend.
DE2636394C2 (fr)
DE2519963A1 (de) Ueberzugs-materialpulver
US5714264A (en) Aqueous powder coating dispersion for packaging containers
EP0792921B1 (fr) Peinture en poudre pour boítes de conditionnement
EP1137723A1 (fr) Procede de durcissement de laques en poudre
EP0847427A1 (fr) Peinture pulverulente et son utilisation en revetement interieur de recipients d'emballage
EP1023404A1 (fr) Composition de peinture pulverulente, procede permettant de la preparer et son utilisation
EP0136263A2 (fr) Vernis en poudre duroplaste et récipient métallique à joint de soudure revêtu de duroplaste ainsi que procédé de revêtement de la surface du joint de soudure d'un récipient métallique
DE19523084A1 (de) Wäßrige Pulverlack-Dispersion für Verpackungsbehälter
EP0004859B1 (fr) Procédé de préparation de compositions pulvérulentes transparentes de revêtement à base de copolyamides et leur application au revêtement d'objets métalliques
DE19545424A1 (de) Pulverlack und dessen Verwendung zur Innenbeschichtung von Verpackungsbehältern
DE2826556A1 (de) Epoxyharz-pulverbeschichtungsmasse
DE102010020487A1 (de) Pulverlacke und deren Verwendung
EP1290097B1 (fr) Peinture en poudre autoreticulante a base de resines epoxydes, et son utilisation
EP0745002A1 (fr) Procede de production de couvercles et/ou de fonds de recipients d'emballage, couvercles et fonds ainsi produits et leur utilisation pour produire des recipients d'emballage, notamment des emballages de denrees alimentaires
HK1016631A (en) Powder coating and its use for the internal coating of packing containers
DE2060574C3 (de) Verfahren zur Herstellung von Überzügen mit Mattierungseffekt
DE19729240A1 (de) Epoxid- und Hybridpulverlacke und deren Verwendung zur Herstellung von matten Epoxid- und Hybridpulverlackbeschichtungen

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: 19980307

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL PT SE

17Q First examination report despatched

Effective date: 19990205

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PPG INDUSTRIES OHIO, INC.

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20010412