EP0363408A1 - Utilisation d'agents de revetement a base de resine imide de polyester pour le revetement de bandes metalliques - Google Patents

Utilisation d'agents de revetement a base de resine imide de polyester pour le revetement de bandes metalliques

Info

Publication number
EP0363408A1
EP0363408A1 EP88904953A EP88904953A EP0363408A1 EP 0363408 A1 EP0363408 A1 EP 0363408A1 EP 88904953 A EP88904953 A EP 88904953A EP 88904953 A EP88904953 A EP 88904953A EP 0363408 A1 EP0363408 A1 EP 0363408A1
Authority
EP
European Patent Office
Prior art keywords
weight
coating
primer
metal strips
good
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.)
Pending
Application number
EP88904953A
Other languages
German (de)
English (en)
Inventor
Klaus-Wilhelm Lienert
Arno Schmitz
Peter Eduard Kunze
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.)
BASF Farben und Fasern AG
Original Assignee
BASF Lacke und Farben AG
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 BASF Lacke und Farben AG filed Critical BASF Lacke und Farben AG
Publication of EP0363408A1 publication Critical patent/EP0363408A1/fr
Pending 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
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]

Definitions

  • the invention relates to methods for coating metal strips in the coil coating process using coating agents based on polyester resin.
  • Suitable binders for the coil coating process are, for example, hydroxyl-containing polyester resins which can be cured with aminoplast resins.
  • High heat resistant systems e.g. Silicone resins, polyester imide resins, polyimide resins, polyamide imide resins, polyhydantoins, polybismaleimides, polyether sulfones and others are known.
  • these binders are used as coating agents for electronic components, coils, electrical conductors, thermally particularly stressed components such as ventilators, pipes, installations in district heating systems, etc. Coating with these coating agents is carried out using various techniques, e.g. Spraying, injection molding, dipping, painting, etc.
  • the disadvantages of these application techniques are high solvent emissions and / or the necessary long burn-in times.
  • EP-A-176 251 discloses highly heat-resistant paints based on silicone resins. However, these paints are not very suitable for exhaust painting cars. Exhaust painting is not only about high heat resistance, but also about shock and water resistance as well as resistance to salt and the corrosive exhaust gases. In addition, the coating of exhausts using the conventional techniques using silicone resins is expensive, and the burn-in times are long.
  • the object on which the invention is based is to develop a method for coating metal strips in the coil coating process, which is particularly suitable for coating parts subject to high temperatures, such as exhausts, mufflers, etc.
  • the coatings obtained should therefore have good temperature resistance, good shock and Water resistance and good resistance to salt, petrol, oil and the corrosive exhaust gases. Conditions are in particular good long-term temperature resistance and excellent corrosion protection.
  • the coatings obtained should have good substrate and intermediate adhesion and good mechanical deformation properties, and the required baking times should be as short as possible.
  • polyester imide resins from polyvalent carboxylic acids or their
  • polyesterimide resins used as component a) are known and are described, for example, in DE-OS 14 45 263 and DE-OS 14 95 100.
  • the polyesterimides are prepared in a known manner by esterifying the polyhydric carboxylic acids with the polyhydric alcohols, if appropriate with addition of oxycarboxylic acids, and using starting materials containing imide groups. Instead of the free acids and / or alcohols, their reactive derivatives can also be used.
  • Terephthalic acid is preferably used as the carboxylic acid component, and ethylene glycol, glycerol and tris-2-hydroxyethyl isocyanurate are preferably used as polyhydric alcohols, the latter being particularly preferred.
  • Tr ⁇ s-2-hydroxyethyl isocyanurate leads to an increase in the softening temperature of the paint film obtained.
  • the starting materials containing imide groups can be obtained, for example, by reaction between compounds, one of which must have a five-membered, cyclic carboxylic anhydride group and at least one further functional group, while the other contains at least one further functional group in addition to a primary amino group.
  • These further functional groups are primarily carboxyl groups or hydroxyl groups, but they can also be further primary amino groups or carboxylic anhydride groups.
  • Examples of compounds having a cyclic carboxylic acid anhydride grouping with a further functional group are, above all, pyromellitic anhydride and trimellitic anhydride.
  • other aromatic carboxylic acid anhydrides are also possible, for example the naphthalene tetracarboxylic acid dianhydrides or dianhydrides of tetracarboxylic acids with two benzene nuclei in the molecule, in which the carboxyl groups are in the 3,3 ', 4- and 4'-positions.
  • Examples of compounds having a primary amino group and a further functional group are, in particular, diprimeric diamines, for example ethylenediamine, tetramethylene diamine, hexamethylene diamine, nonamethylene diamine and other aliphatic diprimeric diamines.
  • Aromatic diprimary diamines such as benzidine, diaminodiphenylmethane, diaminodiphenyl ketone, sulfone, sulfoxide, ether and thioether, phenylenediamines, toluenediamines, xylylenediamines and also diamines with three benzene nuclei in the molecule, such as bis (4-aminophen) ⁇ , ⁇ '-p-xylene or bis (-4-aminophenoxy) - 1,4-benzene, and finally cycloaliphatic diamines such as 4,4'-dicyclohexylmethane diamine.
  • amino group-containing compounds with a further functional group are amino alcohols, for example monoethanolamine or monopropanolamines, and also aminocarboxylic acids, such as glycine, aminopropionic acids, aminocaproic acids or aminobenzoic acids.
  • amino alcohols for example monoethanolamine or monopropanolamines
  • aminocarboxylic acids such as glycine, aminopropionic acids, aminocaproic acids or aminobenzoic acids.
  • Transesterification catalysts used for example heavy metal salts such as lead acetate, zinc acetate, butyl titanates, cerium compounds and organic acids such as e.g. para-toluenesulfonic acid.
  • the same transesterification catalysts can be used as crosslinking catalysts in the curing of the polyesterimides - advantageously in a proportion of up to 3% by weight, based on the binder.
  • Suitable pigments and / or fillers are strontium chromate, zinc chromate, lead chromate, zinc powder, zinc phosphate, metallic pigments, such as e.g. Aluminum, titanium, steel and the like.
  • auxiliaries and additives are silicone oils, waxes, silicates and pyrogenic silicas.
  • Linear and / or cyclic aliphatic and / or aromatic hydrocarbons, ethers, esters, alcohols, amides, phenols and cresols are used as organic solvents.
  • Aromatic hydrocarbons, N-methylpyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, cresols and glycol ethers are preferred.
  • the coating compositions are produced by:
  • binders are first dissolved in the solvent or in the solvent mixture. If other insoluble constituents, such as pigments, fillers, additives and the like, are added to the coating compositions, these can either be added to the solution or, if necessary, dispersed with the dispersing units customary in the coating industry.
  • the method according to the invention comprises a one- or two-layer processing, ie either only one layer can be applied or the coating is composed of a primer and a topcoat, both of which are applied using the coil coating process.
  • the invention relates in particular to a method in which a primer composed of the coating composition comprising components a) to d) with a dry film thickness of 4 to 15 ⁇ m, preferably 5 to 10 ⁇ m, is applied, and a top coat after the primer has hardened from the coating composition from components a) to d) with a dry film thickness of 5 to 23 ⁇ m, preferably 10 to 19 ⁇ m, is applied.
  • the coating agent used as the primer preferably contains anti-corrosion pigments, such as strontium chromate, zinc chromate, lead chromate, zinc powder and zinc phosphate.
  • the coating agent used as topcoat preferably contains metallic pigments such as aluminum, titanium and steel.
  • coated metal strips produced by the method according to the invention are preferably used for the production of thermally stressed parts, such as exhaust parts, exhaust pipes, furnace and radiator linings and grill appliances.
  • the coatings obtained differ from the conventional exhaust coatings in that they have a short burn-in time, have good mechanical deformation properties, are resistant to water, salt, gasoline, oil and brake fluid, are shockproof and resistant to exhaust combustion products, have good corrosion protection and have no substrate and / or intermediate adhesion problems. There is also the advantage that the coating compositions used have excellent storage stability.
  • Polyesterimide 1 polyesterimide 2 polyesterimide 3
  • Viscosity 360-400 470-530 450-550
  • polyester imide 2 38% solution
  • zinc powder 32.3 g
  • zinc powder 32.3 g
  • aluminum silicate 0.4 g
  • 0.2 g of a Teflon powder 2.0 g
  • a leveling agent containing silicone are dispersed to form a primer.
  • the DIN 4 run-down time is 110 s with a solid of 56.5%.
  • Example 3 Primer 3 From 70.2 g of a 35% strength solution of polyesterimide 3, 27.3 g of zinc powder, 0.3 g of an aluminum silicate, 0.2 g of a Teflon powder, 1.8 g of tetralin and 0.2 g of one Vent a primer is prepared by dispersing.
  • the paint has a solids content of 52% with a run-down time of 108 s (DIN 4).
  • a topcoat is formulated from 7.5 g of aluminum powder or flakes, 17.2 g of propylene carbonate and 54.3 g of polyesterimide 3 (35% solution), which has a solids content of 33.5% and a run-down time of 72 s (DIN 4).
  • the primers 1 to 3 and the top coats 1 to 3 are added with 0.8% by weight, based on the binder solid, of a transesterification catalyst.
  • T-bend / tape test 2.0 / 0 2.0 / 0 1.5 / 0 1.5 / 0 2.0 / 0
  • T-bend / tape test 2.0 / 0 2.0 / 0 2.5 / 0 2.0 / 0 2.0 / 0
  • Condensation water change climate (DIN 50017, 240 hours): No bubbles and no cracks.
  • Stone chip test (2 x 500 g stone chips, 3 bar): Little destruction of the surface (approx. 3-5%), occasional breakdown.
  • Adhesion was not affected by repeated heating to 250 ° C and immersion in cold water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Abstract

Dans un procédé pour revêtir des bandes métalliques par couchage sur bande, les agents de revêtement comprennent: a) de 3 à 50 % en poids, de préférence 20 à 40 % en poids, de résines imides de polyester, dont 20 à 60 % en poids des solutions présentent des viscosités à 23°C comprises dans la plage de 90 à 4000 mPas et dont les indices d'hydroxyle se situent dans la plage allant de 50 à 300, b) de 3 à 40 % en poids, de préférence 10 à 30 % en poids de pigments ou de charges, c) jusqu'à 3 % en poids d'adjuvants et d'additifs appropriés et d) de 10 à 90 % en poids, de préférence 20 à 60 % en poids, d'un ou de plusieurs solvants organiques, la somme de a), b), c) et d) atteignant 100 % en poids. L'invention concerne également l'emploi, pour réaliser des pièces d'échappement, des bandes métalliques fabriquées selon ce procédé.
EP88904953A 1987-05-25 1988-05-20 Utilisation d'agents de revetement a base de resine imide de polyester pour le revetement de bandes metalliques Pending EP0363408A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3717596 1987-05-25
DE19873717596 DE3717596A1 (de) 1987-05-25 1987-05-25 Verfahren zum beschichten von metallbaendern im bandlackierverfahren unter verwendung von beschichtungsmitteln auf polyesterimidharzbasis

Publications (1)

Publication Number Publication Date
EP0363408A1 true EP0363408A1 (fr) 1990-04-18

Family

ID=6328372

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88904953A Pending EP0363408A1 (fr) 1987-05-25 1988-05-20 Utilisation d'agents de revetement a base de resine imide de polyester pour le revetement de bandes metalliques
EP88108106A Expired - Lifetime EP0297270B1 (fr) 1987-05-25 1988-05-20 Utilisation de matériau à base de résine polyesterimide pour le recouvrement de bandes métalliques

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88108106A Expired - Lifetime EP0297270B1 (fr) 1987-05-25 1988-05-20 Utilisation de matériau à base de résine polyesterimide pour le recouvrement de bandes métalliques

Country Status (7)

Country Link
US (1) US5141818A (fr)
EP (2) EP0363408A1 (fr)
AT (1) ATE61380T1 (fr)
CA (1) CA1330023C (fr)
DE (2) DE3717596A1 (fr)
ES (1) ES2021114B3 (fr)
WO (1) WO1988009359A1 (fr)

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DE19632175A1 (de) 1996-08-09 1998-02-12 Beck & Co Ag Dr Drahtlacke enthaltend Polyesterimide und/oder Polyamidimide mit Polyoxyalkylendiaminen als molekularen Bausteine
US5753306A (en) * 1996-09-11 1998-05-19 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method of forming a composite coating with particle materials that are readily dispersed in a sprayable polyimide solution
DE19648830A1 (de) * 1996-11-26 1998-05-28 Beck & Co Ag Dr Verfahren zur Herstellung carboxyl- und hydroxylgruppenhaltiger Polyesterimide und deren Verwendung in Drahtlacken
US6344100B1 (en) 1999-09-29 2002-02-05 Robert A. Hipskind Method of resurfacing a roll
US20050011753A1 (en) * 2003-06-23 2005-01-20 Jackson John R. Low energy chlorate electrolytic cell and process
US20070031672A1 (en) * 2005-08-08 2007-02-08 Frank-Rainer Boehm Wire-coating composition based on new polyester amide imides and polyester amides
US9006350B2 (en) * 2006-12-22 2015-04-14 Axalta Coating Systems Ip Co., Llc Selfbonding enamels based on new polyester amide imides and polyester amides
CN101720279A (zh) * 2007-04-27 2010-06-02 威士伯采购公司 可交联酰亚胺聚酯涂料
US20160075105A1 (en) 2014-09-17 2016-03-17 Basf Coatings Gmbh Automotive vehicle exterior laminate component and method of forming same

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DE1495100B2 (de) 1961-11-02 1972-05-10 Dr. Beck & Co Ag, 2000 Hamburg Verfahren zur herstellung von polyesterimiden
US4170684A (en) * 1961-11-02 1979-10-09 Dr. Beck & Co. A.G. Conductors having insulation of polyester imide resin
DE1445263C3 (de) 1961-12-12 1979-12-13 Dr. Beck & Co Ag, 2000 Hamburg Verwendung von Polyesterimiden für die Einbrennisolierung auf elektrischen Leitern
US3944706A (en) * 1974-08-01 1976-03-16 Standard Oil Company Self-bonding polyethylene trimellitate imide varnish
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Also Published As

Publication number Publication date
CA1330023C (fr) 1994-06-07
EP0297270B1 (fr) 1991-03-06
ES2021114B3 (es) 1991-10-16
US5141818A (en) 1992-08-25
EP0297270A1 (fr) 1989-01-04
DE3717596A1 (de) 1988-12-08
DE3861922D1 (de) 1991-04-11
ATE61380T1 (de) 1991-03-15
WO1988009359A1 (fr) 1988-12-01

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