[go: up one dir, main page]

EP0000796A1 - Composition de revêtement et procédé pour revêtir des surfaces métalliques - Google Patents

Composition de revêtement et procédé pour revêtir des surfaces métalliques Download PDF

Info

Publication number
EP0000796A1
EP0000796A1 EP78200111A EP78200111A EP0000796A1 EP 0000796 A1 EP0000796 A1 EP 0000796A1 EP 78200111 A EP78200111 A EP 78200111A EP 78200111 A EP78200111 A EP 78200111A EP 0000796 A1 EP0000796 A1 EP 0000796A1
Authority
EP
European Patent Office
Prior art keywords
weight
composition according
coating
melamine
formaldehyde resin
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.)
Withdrawn
Application number
EP78200111A
Other languages
German (de)
English (en)
Inventor
Jr. John K. Howell
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.)
GEA Group AG
Continentale Parker Ste
Continentale Parker SA
Original Assignee
Metallgesellschaft AG
Continentale Parker Ste
Continentale Parker SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metallgesellschaft AG, Continentale Parker Ste, Continentale Parker SA filed Critical Metallgesellschaft AG
Publication of EP0000796A1 publication Critical patent/EP0000796A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to the field of applying an organic coating to a metal surface, and in particular to an aqueous-based organic coating composition to impart corrosion resistance and paint receptivity to the metal surface.
  • the invention is particularly directed to providing a composition and method of operation for the application of an organic coating to the surfaces of black tin or tin cans.
  • the methods of can making include three-part processes, in which a separate lid and base are connected to a seam structure to form the complete can, and two-part processes, in which a uniform side wall and base structure are cold formed from one Sheet metal is formed and the lid is attached to it to form the finished can. While the specific coating requirements vary depending on the manufacturing method and / or material, it is generally necessary to apply a relatively non-porous organic coating to the metal surface in order to 1) provide sufficient corrosion resistance to the metal surface, 2) provide a suitable basis for decorative paints and top coats and 3) create a suitable separation layer between the metal surface and the food, drink or other filling goods for which the can is intended.
  • the aisle would be similar with a favorable application of a conversion coating and a rinsing after the rinsing stage 3).
  • the usual technique for applying the sanitary interior paint to the can is by means of an airless spraying device.
  • this requires that the cans are sprayed individually in order to obtain a uniform coating.
  • the cans are not separated during the cleaning and rinsing stages for individual treatment. It is therefore desirable to be able to use both the base coat on the outside and a sanitary interior lacquer layer by mass treating cans with a so-called ⁇ Wash coat "in a can washer-type device, rather than treating each of the cans individually.
  • the four necessary components of the composition according to the invention are an epoxy resin, an alkylated melamine-formaldehyde resin, an acid catalyst and a block copolymer of the formula given.
  • the above components form a stable aqueous phase at a total working bath concentration in the range of about 5 to 40% by weight.
  • a concentrate of the composition can be prepared in a total concentration of up to 85% by weight. In highly concentrated concentrate compositions it is sometimes desirable to incorporate a very small amount of an ammonium salt of phosphoric acid to improve stability, e.g. about 0.04 to 0.2% by weight.
  • the epoxy resin component of the composition of the invention has an average molecular weight of about 900 to 2900 and about 2.7 to 11.6 hydroxyl groups per mole.
  • the preferred epoxy resin has an average molecular weight of about 900 and a hydroxyl equivalent of about 2.7 to 4.2 equivalents per mole.
  • Suitable epoxy resins are commercially available and, for example, the products of the Epon 1001 to 1007 series of resins (Shell Chemical Co.).
  • any such resin known as an amino crosslinking agent can be used as the alkylated melamine-formaldehyde resin.
  • Such products generally have an equivalent weight in the range of 130 to 240 according to the manufacturer's specifications.
  • the melamine-formaldehyde resin is alkylated with one or more alcohols with 1 to 4 carbon atoms to give a corresponding alkylated melamine-formaldehyde resin.
  • the concentration of the alkylated melamine-formaldehyde resin in the composition is selected so that the weight ratio of epoxy resin: melamine-formaldehyde resin is from 2: 1 to 20: 1.
  • Suitable alkylated melamine-formaldehyde resins are commercially available and, for example, the products Cymel 303, Cymel 1130 and Cymel 1156 (from American Cyanamid).
  • the block copolymer which is the third necessary component of the composition, is a block copolymer containing two polyoxyethylene segments separated by a polyoxypropylene segment.
  • the block copolymer thus has the following general formula:
  • HLB number hydrophilic-lipophilic ratio
  • the concentration of block copolymer in the composition should be 2 to 12% by weight of the total concentration of epoxy and melamine-formaldehyde resin used.
  • the fourth necessary component of the composition is an acid catalyst, which is used in a to effect the Ver. Wetting of the epoxy and melamine pormaldehyde resin is available in sufficient quantity during the heat curing.
  • the catalyst can be any acidic catalyst known to cure amino resins with Polymers containing hydroxyl, carboxyl or amine functionalities are accelerated, such as, for example, mineral acids, p-toluenesulfonic acid, dodecylbenzenesulfonic acid, phosphoric acid, alkylphosphoric acid, maleic acid, trimellitic acid, phthalic acid, acrylic acid-containing polymers.
  • the concentration of such catalysts is normally in the range from 0.2 to 1.5% by weight of the other nonvolatile constituents of the composition.
  • a particularly useful catalyst is an ammonium salt of an alkyl or alkylaryl polyoxyethylene sulfate.
  • the formula for the anion of such a compound is where R is an alkyl or alkylaryl group of at least 10 carbon atoms which contains a saturated alkyl moiety and m is in the range from about 4 to 30.
  • R is a phenyl group containing a propylene trimere.
  • Suitable products of this type are commercially available, for example the products Alipal EP 110, EP 115 and EP 120 (from GAF Corp.). The use of such compounds has a second advantage in that they also act to aid in the emulsification of the aqueous composition.
  • the water for the preparation of the agent can be tap water; However, deionized or distilled water is preferred because it eliminates the presence of unknown and unquantified ions that can affect coating quality.
  • auxiliaries can be used, for example agents for adjusting the viscosity and flow characteristics, such as hydroxymethyl cellulose, hydroxyethyl cellulose, water-soluble glycol ethers and alcohols; Benzoic acid to prevent rusting of the metal surface when drying; Ammonium salts of phosphoric acids to impart phase stability and / or pH adjustment; Common pH adjusters such as the commonly used organic and inorganic acids e.g.
  • Tannic acid, citric acid and tartaric acid additional emulsifiers and lubricants (surface lubricants); Defoaming agents and organic solvents that aid in emulsification, such as cyclohexanone, toluene, methyl ethyl ketone, methyl isobutyl ketone, methyl isoamyl ketone and the like.
  • While flooding is the preferred method of application in the case of treating metal cans, other common techniques such as spraying, dipping and roller application where appropriate for the surfaces to be treated can also be used.
  • Hardening is typically carried out at temperatures above 149 ° C. At 232 ° C the curing can be accomplished in about 2.5 minutes.
  • Black tin cans in particular do not move through a can manufacturing line as easily as tin cans do, since the tin surface tends to reduce the friction between the can surface and the treatment device. Black tin cans tend to be subject to excessive friction as they move through the treatment facility and therefore cause a noticeable number of line disturbances. This difficulty is overcome by the agent according to the invention, since the black plate surface is given additional lubricity, which enables the can production line to run more smoothly.
  • test piece metal can, cutout or sheet coated with an organic coating is immersed in a boiling 1% detergent solution (Joy solution) for 30 minutes. After removing it from the solution, the test piece is rinsed well with running tap water, scratched to the metal in a cross-cutter and blown dry with compressed air. Then the cross-cut area is firmly provided with an adhesive tape. The tape is quickly peeled off the metal surface and the cross-cut area is inspected. The test piece is then evaluated and classified into three categories: no paint removed; slight paint deduction (still acceptable) or larger paint deduction (not acceptable). Comparative numerical evaluations are sometimes used in the examples. The rating “10” means no paint deduction. Ratings from “6" to "9” correspond to small but still acceptable paint proof (less than 10% removed) and from " 0" to "5" correspond to larger paint proof (more than 10% removed).
  • Twelve drawn and ironed tinplate beverage cans (size 6.5 cm x 12.2 cm) were treated after the procedure: 45 seconds of spraying with cleaner A; 15 seconds spray hot water; 15 seconds spray rinse of deionized water; 10 seconds flood emulsion treatment on each of the inner and outer can surfaces; Drain for 30 seconds; 3 min. Oven with circulating air at a temperature of 260 ° C.
  • the extraction test consisted of spraying the coated cans for 1 min with hot (87.8 ° C) deionized water (4.9 micro mho), filling the cans with distilled water to within 0.63 cm from the top, each Cover the can with a piece of aluminum foil, place the cans on a rack in a 20 liter pressure container containing a small amount of distilled water and heat the pressure container to 1.05 kg / cm 2 (121 ° C) for two hours from the Time from when the pressure reaches 1.05 kg / cm 2 .
  • the water samples from the inside of the can were evaporated into pure Pyrex bottles and the weight of the residue, which makes up the extracted non-volatile, was determined.
  • the average result in mg of extracted / can was 3.06, which corresponds to 0.08 mg / 6.45 cm 2 or an "extraction residue" of 8.08 ppm.
  • the values approved according to the regulations are 0.5 mg / 6.45 cm 2 or 50 ppm, if the coating is composed of previously recognized components.
  • 36 tin cans (size 6.8 cm x 12.2 cm) were treated as follows (12 per emulsion variant): prewash diluted soap; Rinsing hot water; 1 min. Cleaner C; 20 sec. Hot water spray; 10 seconds spray rinse of deionized water; Transfer from can frame to blunted wooden cone; 10 to 15 seconds of emulsion 4A, 4B or 4C; 5 minutes hardening at 232 ° C.
  • These particular cans were immersed in the coating emulsions so that none of the coating material was let into the inside of the containers.
  • Seoh's other cans (2 per variation) were treated similarly, except that they were coated on the inside and outside and cured for 2.5 minutes at 232 ° C. Each can had been cleaned, rinsed and weighed so that the coating weight (mg / can) could be determined by weighing the coated container again.
  • Table IV A The composition of the respective emulsions is given in Table IV A.
  • the determined average layer weight (inside and outside) (average of 2 determinations) was: 4A: 155 mg / can; 4B: 140 mg / can; 4C: 110 mg / can.
  • 35 of the 36 cans coated only on the outside were marked with a black marker pen on the inside so that they could be selected from the regular can production.
  • the cans were placed in the conveyor above a commercial printer when space or slight delays occurred, and so well mixed with regular production.
  • the cans were printed with a three-color beer can label (white, dark red and blue) and overpainted, fired, received 2 interior lacquer (sanitary lacquer) coatings of about 110 mg per pass and were fired. After the final hardening, the cans were separated from the regular production and removed from the line. All 35 have been recovered.
  • the adhesion of the printing inks to the cans coated with the emulsions of this example was as good or better than the controls.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Epoxy Resins (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP78200111A 1977-07-22 1978-07-18 Composition de revêtement et procédé pour revêtir des surfaces métalliques Withdrawn EP0000796A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81818477A 1977-07-22 1977-07-22
US818184 1977-07-22

Publications (1)

Publication Number Publication Date
EP0000796A1 true EP0000796A1 (fr) 1979-02-21

Family

ID=25224893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200111A Withdrawn EP0000796A1 (fr) 1977-07-22 1978-07-18 Composition de revêtement et procédé pour revêtir des surfaces métalliques

Country Status (8)

Country Link
EP (1) EP0000796A1 (fr)
JP (1) JPS5431440A (fr)
AU (1) AU3890178A (fr)
BR (1) BR7804742A (fr)
CA (1) CA1132277A (fr)
GB (1) GB2001323B (fr)
IT (1) IT1097041B (fr)
ZA (1) ZA784125B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436211A1 (de) * 1984-01-26 1985-08-08 HITCO, Newport Beach, Calif. Zusammensetzung zur veredelung von kohlenstoffasern
WO1998045370A1 (fr) * 1997-04-04 1998-10-15 Basf Aktiengesellschaft Emulsifiants pour resines amino
US20180036672A1 (en) * 2016-08-04 2018-02-08 Exxonmobil Research And Engineering Company Increasing scales, capacities, and/or efficiencies in swing adsorption processes with hydrocarbon gas feeds
CN110499002A (zh) * 2019-07-04 2019-11-26 四川达灿石油设备有限公司 用于浮箍浮鞋的树脂材料类的配方以及高性能浮箍浮鞋

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS591170Y2 (ja) * 1979-09-21 1984-01-13 積水化学工業株式会社 温水器
AU7886987A (en) * 1986-09-26 1988-03-31 Union Carbide Corporation Formable epoxy coating composition

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6908546A (fr) * 1968-06-05 1969-12-09
FR2315526A1 (fr) * 1975-06-23 1977-01-21 Ciba Geigy Ag Procede de preparation de produits de revetement thermodurcissables diluables a l'eau

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934734A (fr) * 1972-08-01 1974-03-30
JPS5321012B2 (fr) * 1973-02-09 1978-06-30
US4048179A (en) * 1974-12-12 1977-09-13 Ciba-Geigy Corporation Process for preparing water-dilutable, heat-curing coating compositions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6908546A (fr) * 1968-06-05 1969-12-09
FR2315526A1 (fr) * 1975-06-23 1977-01-21 Ciba Geigy Ag Procede de preparation de produits de revetement thermodurcissables diluables a l'eau

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436211A1 (de) * 1984-01-26 1985-08-08 HITCO, Newport Beach, Calif. Zusammensetzung zur veredelung von kohlenstoffasern
WO1998045370A1 (fr) * 1997-04-04 1998-10-15 Basf Aktiengesellschaft Emulsifiants pour resines amino
US20180036672A1 (en) * 2016-08-04 2018-02-08 Exxonmobil Research And Engineering Company Increasing scales, capacities, and/or efficiencies in swing adsorption processes with hydrocarbon gas feeds
CN110499002A (zh) * 2019-07-04 2019-11-26 四川达灿石油设备有限公司 用于浮箍浮鞋的树脂材料类的配方以及高性能浮箍浮鞋

Also Published As

Publication number Publication date
JPS5431440A (en) 1979-03-08
GB2001323A (en) 1979-01-31
CA1132277A (fr) 1982-09-21
GB2001323B (en) 1982-02-10
IT1097041B (it) 1985-08-26
IT7825908A0 (it) 1978-07-20
AU3890178A (en) 1980-02-21
ZA784125B (en) 1979-07-25
JPS5627545B2 (fr) 1981-06-25
BR7804742A (pt) 1979-04-24

Similar Documents

Publication Publication Date Title
DE3146265C2 (fr)
US4289826A (en) Water-borne coating for metal surfaces
DE3151181C2 (fr)
EP0178020B1 (fr) Procédé pour le traitement de surfaces d'aluminium
EP0091166A1 (fr) Procédé pour traiter de surfaces métalliques
DE1184588B (de) Verfahren und Loesung zum Aufbringen von festhaftenden UEberzuegen aus Polyvinylphosphonsaeure auf Metallteilen
DE4412138A1 (de) Chromfreies Verfahren zur No-Rinse Behandlung von Aluminium und seinen Legierungen sowie hierfür geeignete wäßrige Badlösungen
DE2709308C2 (fr)
DE1805007B2 (de) Verwendung eines Mischpolymerisatharzes als Bindemittel in wäßrigen, elektrisch abschneidbaren Überzugsmitteln
EP0163325A2 (fr) Procédé et agent de revêtement pour le traitement de surfaces métalliques
DE69512049T2 (de) Zusammensetzung und verfahren zur oberflächenbehandlung aluminiumhaltiger metalle
DE2002599B2 (de) Verfahren zum aufbringen organischer lack- und farbueberzuege auf metallische oberflaechen
WO2014072443A1 (fr) Prétraitement de boîtes pour une meilleure adhérence de vernis
US4233197A (en) Water-borne coating for metal surfaces
DE3247729A1 (de) Verfahren zur behandlung von metalloberflaechen, insbesondere solchen von aluminium, aluminiumlegierungen und stahl, sowie hierfuer geeignete waessrige badloesungen
EP0000796A1 (fr) Composition de revêtement et procédé pour revêtir des surfaces métalliques
DE3925169A1 (de) Verfahren zur nachbehandlung von elektroplattierten, zum verloeten vorgesehenen stahlblechen
DE69715734T2 (de) Oberflächenbehandeltes Metallmaterial
DE1803878A1 (de) Verfahren zum UEberziehen von metallischen Oberflaechen
DE3909694A1 (de) Erzeugung schwarzer ueberzuege auf harten oberflaechen
DE3423990A1 (de) Peroxidfreie chrom(iii)-passivierungsloesung und verfahren zum passivieren von substraten mit dieser loesung
DE2838383C3 (de) Stabile, auf dem Wasser schwimmende Emulsion auf Vinylharzbasis für die Beschichtung von Substraten
DE2427121A1 (de) Verfahren zur behandlung der oberflaeche von metallen und waessrige loesung einer melamin-formaldehydverbindung zur durchfuehrung des verfahrens
DE3120952C2 (fr)
DE19636370B4 (de) Verfahren zur Herstellung von Schutzschichten auf Flacherzeugnissen aus Titanzink und Flacherzeugnis

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

AK Designated contracting states

Designated state(s): BE DE FR NL

17P Request for examination filed
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn
RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOWELL, JR.,JOHN K.