EP0059136A2 - Uberzugsverfahren für Metallsubstrate mittels Kunststoffen und auf diese Weise erhaltene Metallkunststoffkomplexe - Google Patents

Uberzugsverfahren für Metallsubstrate mittels Kunststoffen und auf diese Weise erhaltene Metallkunststoffkomplexe Download PDF

Info

Publication number
EP0059136A2
EP0059136A2 EP82400214A EP82400214A EP0059136A2 EP 0059136 A2 EP0059136 A2 EP 0059136A2 EP 82400214 A EP82400214 A EP 82400214A EP 82400214 A EP82400214 A EP 82400214A EP 0059136 A2 EP0059136 A2 EP 0059136A2
Authority
EP
European Patent Office
Prior art keywords
polyamide
primer
layer
resins
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82400214A
Other languages
English (en)
French (fr)
Other versions
EP0059136A3 (en
EP0059136B1 (de
Inventor
Simon Ralph Kabalo
Franco Marchese
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.)
ATO Chimie SA
Original Assignee
ATO Chimie 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 ATO Chimie SA filed Critical ATO Chimie SA
Publication of EP0059136A2 publication Critical patent/EP0059136A2/de
Publication of EP0059136A3 publication Critical patent/EP0059136A3/fr
Application granted granted Critical
Publication of EP0059136B1 publication Critical patent/EP0059136B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/53—Base coat plus clear coat type
    • B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/10—Applying the material on both sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2451/00—Type of carrier, type of coating (Multilayers)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00—Epoxy polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2505/00—Polyamides

Definitions

  • the invention relates to the field of coating of metallic substrates. It relates more particularly to a process for coating metal substrates using plastics making it possible to produce multi-layer metal-plastic complexes. It also relates to the products obtained by such a process.
  • the metals constituting the sheet were generally steel or galvanized steel or aluminum or an aluminum-based alloy.
  • the plastics used were mainly polyvinyl chloride, and to a lesser extent polyethylene.
  • the present invention relates to the application to a metal substrate of one or more layers of plastics, the outer layer always being polyamide.
  • the object of the present invention is on the one hand to provide a more economical method than the known methods which start from films produced beforehand, and on the other hand, to provide a method applicable to polyamides.
  • polyamides are indeed particularly advantageous by their resistance to temperature, to abrasion, to chemical agents which are better than those of plastics used until now, such as PVC and provide total protection against corrosion to the metallic substrate of based.
  • the subject of the invention is a method for coating a metal substrate by applying a primary layer and at least one layer of plastic material, characterized in that the primary layer comprises a resin chosen from epoxy resins - phenolics, mixtures of epoxy resins and phenolic resins and combinations of said resins and mixtures of resins, in that the last layer of plastic material is a layer of polyamide applied in the form of a suspension, in an organic liquid phase, polyamide powder, the particle size of which is less than 40 ⁇ m and in that the assembly is heated until the outer polyamide layer melts and a continuous coating is obtained.
  • the primary layer comprises a resin chosen from epoxy resins - phenolics, mixtures of epoxy resins and phenolic resins and combinations of said resins and mixtures of resins
  • the last layer of plastic material is a layer of polyamide applied in the form of a suspension, in an organic liquid phase, polyamide powder, the particle size of which is less than 40 ⁇ m and in that the assembly is heated until the outer polyamide layer melts and
  • the invention involves the application to the substrate of an organic bonding primer, susceptible to a structural modification by heat.
  • the substrate me-. metal intended to be covered with polyamide suspension is previously coated with a primer, because, among other functions, this ensures the bond between the metal and the polyamide coating, due to the very good adhesiveness which it has both towards metals and polyamides.
  • the primer strengthens the metal protection provided by the polyamide coating firstly by preventing the path between metal and polyamide of gases such as oxygen, carbon dioxide, water vapor, and then, by superimposing its own protective action to that of polyamide.
  • the presence of the primer is even more essential when the sheet to be coated has not undergone a preparation treatment.
  • the primer contains an epoxy resin in an amount between 1 and 20% of the total weight of the primer, associated with a phenolic resin in an amount between 1 and 20% of the total weight of the primer, or an epoxy resin -phenolic in an amount between 1% and 20% of the total weight of the primer or a mixture of the above resins in the same weight proportions relative to the primer. as those mentioned above.
  • the anti-corrosion action provided by the primer can be reinforced by adding to the primer corrosion-inhibiting chemical compounds such as zinc phosphate, tetrahydro zinc xychromate, strontium chromate, these salts can be used alone or as a mixture.
  • the primer corrosion-inhibiting chemical compounds such as zinc phosphate, tetrahydro zinc xychromate, strontium chromate, these salts can be used alone or as a mixture.
  • the second step of the coating process consists in coating the primer with a suspension of a fine polyamide-based thermoplastic powder, presented in a solvent or mixture of organic solvents.
  • the final step of heating the entire coating can allow proper attachment of the primer on the substrate.
  • the final heating step causes the polyamide particles to melt and forms a continuous and smooth layer on the substrate. In the polyamide layer, this is a purely physical transformation carried out under the effect of the rise in temperature, for example in a heat treatment oven. This characteristic is advantageous and constitutes an important difference with the processes of the prior art in which the heat treatment was intended to effect a chemical transformation comparable to a crosslinking in the plastic layer. final.
  • the final layer or finishing layer is obtained by evaporation of the liquid phase in which the polyamide particles are suspended and by fusion of said particles to form the final layer.
  • the grain size of the polyamide powder corresponds to a specific particle size, being in a range of less than 40 ⁇ m and preferably between 10 and 40 ⁇ m, particularly between 10 and 30
  • the powders suspended are powders of polyamides, that is to say resins of high molecular weight obtained from lactams or amino acids whose hydrocarbon chain has a number of carbon atoms between 4 and 20 such as, for example, caprolactam, oenantholactam, dodecalactam, undecanolactam, dodecanolactam, 11 amino-undecanoic acid, 12 amino-dodecanoic acid.
  • the polyamide can also be a condensation product of a dicarboxylic acid with a diamine such as, for example, the polyamides 6.6, 6.9, 6.10, 6.12, 9.6, condensation products of hexamethylene diamine with adipic acid, azelaic acid, sebacic acid, 1.12 dodecane-dioic acid and nonamethylene diamine with adipic acid.
  • the powders can consist of copolyamides resulting from the polymerization of the various monomers mentioned above.
  • copolyamides result from the polycondensation of ⁇ -caprolactam, amino-undecanoic acid and / or lauryl lactam.
  • their melting viscosity is all the higher, which harms their spreading on the substrate during melting; according to the present invention, the suspension may contain adjuvants promoting the spreading of: polyamide melt despite a viscosity of high fusion.
  • the lower the molecular weight the more the coating will be fluid in the molten state to the detriment of its mechanical properties, its aging and its resistance to weathering.
  • the inherent viscosity (measured at 20 ° C. for a solution of 0.5 g in 100 ml of metacresol) of the polyamide powders, reflecting their molecular mass, is between the values 0.75 and 1.40; the nature of the polyamide and the final application of the coated substrate are the determining factors for choosing the most favorable value.
  • the polyamide powders used according to the invention can be obtained by all kinds of techniques known to a person skilled in the art, for example by grinding polyamide granules previously cooled with liquid nitrogen, or dissolving these granules in solvents hot and precipitation by cooling, among others.
  • the organic liquid phase containing the polyamide powder in suspension, comprises a solvent or mixture of solvents chosen from alcohols, esters, aromatic hydrocarbons, and ketones, as is known to those skilled in the art to choose a suitable solvent for polyamides. :
  • solvents examples include benzyl alcohol, N-methyl pyrrolidone, ethyl glycol acetate, di-butyl glycol acetate or mixtures of solvents marketed under the name Solvesso 100 and 150.
  • the suspension based on polyamide powder may contain various additives which promote suspension, such as expanded silica (for example the product known as Aerosil) or which modify the surface tension, as is known to man of the art. art in the field of paints and varnishes.
  • expanded silica for example the product known as Aerosil
  • surface tension as is known to man of the art. art in the field of paints and varnishes.
  • These powders can be in their natural state and, consequently, generate colorless or pigmented coatings, the pigment or pigments that can be introduced into the suspension using a cutting resin as is known to those skilled in the art. art for the formulation of pigmented compositions.
  • the coating can be make on one or both sides of such a sheet.
  • the process is applicable with the most advantages to metal strips of thickness between 0.2mm and 2mm approximately.
  • the thickness of the external polyamide finishing layer is between approximately 20 and 50 ⁇ .
  • the strip unwinding station includes a coil 1-and an accumulator allowing it to absorb variations in length and tension due to coil changes.
  • the strip then passes through a primary coating station 3.
  • the station 3 includes a duo of cylinders working according to the known technique called "reverse roll”.
  • An alternative embodiment of this coating / priming step is shown in FIG. 2.
  • the solution / apply is contained in a tank 10 and deposited on the strip by a duo of cylinders 11,12.
  • a final thickness of 6 to 7 microns is considered sufficient for the primer.
  • the general reference 4 designates a drying and crosslinking oven for the primer deposited at station 3.
  • the temperature to be reached in the oven 4 will obviously depend on the nature of the primer.
  • the installation shown in FIG. 1 for implementing the method of the invention then comprises a station 5 for cooling by pulsed air the strip coated with primer.
  • Station 6 is used to apply a thin polyamide powder dispersion layer according to the invention to the strip already coated with primer.
  • station 6 comprises a duo of cylinders working according to the principle of rotogravure (similar to FIG. 2).
  • a drying and gelling oven 7 is used to remove the solvents from the organic phase and to melt the grains of fine powder into a continuous layer. On leaving the oven 7 the strip passes through a cooling station 8 and then into a reel 9 preceded by its accumulator 9a.
  • the temperature conditions in the oven 7 will depend on the nature of the polyamides used.
  • the area between the temperature curve recorded on the sheet between the entry and exit of the oven, the x-axis (indifferently graduated in space or time) and the two verticals corresponding to the entry and to leaving the oven corresponds to the energy used to carry out the operations for removing the solvents, crosslinking the cutting binder and melting the polyamide powder.
  • the method of the invention makes it possible to treat metallic substrates presented in coils, by means of a continuous manufacturing line of the kind shown in FIG. 1.
  • This primer is characterized by a total absence of yellowing and good flexibility due to the presence of polyester; on the other hand, its resistance to boiling water is poor.
  • This primer is also characterized by an absence of yellowing.
  • This primer is characterized by good resistance to boiling water. It can therefore be seen that the formulation of the primer can be adapted to the end use of the coated sheet.
  • the polyamide powder may, depending on the desired applications, have a concentration in the dispersion varying from 20 to 50%
  • It also serves as a cutting resin, a vector for various additives or a complement of fillers allowing the finish layer to be tinted.
  • the multilayer metalloplastic complex obtained can undergo successfully without exhibiting the phenomenon of detachment from the plastic coating the immersion test for 1000 hours in boiling water on test pieces having undergone cross-shaped notches in the coating.
  • a strip of aluminum in a continuous strip 0.5 mm thick having undergone a surface preparation with the commercial product referenced COLARDIN 6204 from the company CFPI, receives at the coating station 3 a primary layer according to II the formula, / with a dry thickness of 4 to 5 microns and reaches in the oven 4 a PMT of 249 ° C Similarly, in the second oven 7 the strip also reaches a PMT of 249 ° C after application of a layer of formula VI where the polyamide is a polyamide 12 of which it will retain a dry thickness of 25 microns.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP19820400214 1981-02-23 1982-02-05 Uberzugsverfahren für Metallsubstrate mittels Kunststoffen und auf diese Weise erhaltene Metallkunststoffkomplexe Expired EP0059136B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8103528A FR2500371A1 (fr) 1981-02-23 1981-02-23 Procede de fabrication en continu de complexes multicouches metal-plastique et produits obtenus
FR8103528 1981-02-23

Publications (3)

Publication Number Publication Date
EP0059136A2 true EP0059136A2 (de) 1982-09-01
EP0059136A3 EP0059136A3 (en) 1982-10-06
EP0059136B1 EP0059136B1 (de) 1985-09-18

Family

ID=9255518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820400214 Expired EP0059136B1 (de) 1981-02-23 1982-02-05 Uberzugsverfahren für Metallsubstrate mittels Kunststoffen und auf diese Weise erhaltene Metallkunststoffkomplexe

Country Status (5)

Country Link
EP (1) EP0059136B1 (de)
JP (1) JPS57156070A (de)
CA (1) CA1179558A (de)
DE (1) DE3266260D1 (de)
FR (1) FR2500371A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411690A1 (de) * 1989-07-31 1991-02-06 Akzo Nobel N.V. Vorgrundierte Metallsubstrate für Formmetallverarbeitungen
EP1070553A1 (de) * 1999-07-17 2001-01-24 Dieter Müller Verfahren zum Beschichten der Oberfläche von feuervzerinkten Werkstücken aus Eisen oder Stahl
WO2009149143A1 (en) * 2008-06-03 2009-12-10 E. I. Du Pont De Nemours And Company Adhesion of polyamides to epoxy resins
EP2769775A4 (de) * 2011-10-17 2015-07-01 Baoshan Iron & Steel Verfahren zur herstellung einer extradicken isolierbeschichtung für eine elektrostahloberfläche

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177238A (ja) * 1985-02-02 1986-08-08 日新製鋼株式会社 マフラ−用塗装鋼板およびその製造方法
JPS61177237A (ja) * 1985-02-02 1986-08-08 日新製鋼株式会社 マフラ−用塗装鋼板およびその製造方法
JP6918973B2 (ja) 2017-12-13 2021-08-11 昭和電工株式会社 複合積層体及びその製造方法、並びに金属樹脂接合体及びその製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2075916A1 (de) 1970-01-02 1971-10-15 British Aluminium Co Ltd

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL241330A (de) * 1958-07-18
FR1215101A (fr) * 1958-11-05 1960-04-14 Pechiney Procédé de revêtement de surfaces métalliques par des polyoléfines
BE683230A (de) * 1966-06-27 1966-12-01
US3593848A (en) * 1968-02-26 1971-07-20 Atlas Coatings Corp Foam-covered coil and methods of manufacturing the same
FR1601194A (de) * 1968-12-31 1970-08-10
FR1602751A (de) * 1968-12-31 1971-01-25
FR1601195A (de) * 1968-12-31 1970-08-10
IT964886B (it) * 1971-08-24 1974-01-31 Cabot Corp Composizione in polvere per tecni di esecuzione di rivestimenti senza solvente
JPS515018B2 (de) * 1972-05-18 1976-02-17
SE387133B (sv) * 1972-10-18 1976-08-30 Diamond Shamrock Corp Sett att framstella en grundfergsoverdragningskomposition
JPS5758385B2 (de) * 1973-08-27 1982-12-09 Daicel Chem
GB2019252B (en) * 1978-04-03 1982-07-21 Oakland Corp Friction locking threaded fastener
JPS55152055A (en) * 1979-05-16 1980-11-27 Toa Gosei Chem Ind Resin coated zinc plated steel plate and adhering vessel using said resin coated zinc plated steel plate as blank

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2075916A1 (de) 1970-01-02 1971-10-15 British Aluminium Co Ltd

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411690A1 (de) * 1989-07-31 1991-02-06 Akzo Nobel N.V. Vorgrundierte Metallsubstrate für Formmetallverarbeitungen
US5229214A (en) * 1989-07-31 1993-07-20 Akzo N.V. Preprimed metal substrates for formed metal applications
EP1070553A1 (de) * 1999-07-17 2001-01-24 Dieter Müller Verfahren zum Beschichten der Oberfläche von feuervzerinkten Werkstücken aus Eisen oder Stahl
WO2009149143A1 (en) * 2008-06-03 2009-12-10 E. I. Du Pont De Nemours And Company Adhesion of polyamides to epoxy resins
EP2769775A4 (de) * 2011-10-17 2015-07-01 Baoshan Iron & Steel Verfahren zur herstellung einer extradicken isolierbeschichtung für eine elektrostahloberfläche

Also Published As

Publication number Publication date
FR2500371B1 (de) 1983-06-03
DE3266260D1 (en) 1985-10-24
CA1179558A (en) 1984-12-18
JPS57156070A (en) 1982-09-27
EP0059136A3 (en) 1982-10-06
FR2500371A1 (fr) 1982-08-27
JPH0230308B2 (de) 1990-07-05
EP0059136B1 (de) 1985-09-18

Similar Documents

Publication Publication Date Title
JP3713278B2 (ja) ポリエステル組成物および押出被覆でのその使用
CA2424534C (fr) Surfaces metalliques revetues de polyamide
CA2002109C (fr) Procede pour revetir des substrats metalliques a l'aide d'un primaire en poudre et d'un revetement superficiel applique par trempage, compositions de primaire en poudre utilisees et materiaux composites obtenus
CA2023122C (fr) Compositions thermoplastiques en poudre a base de polyamide et/ou de polyetheresteramide leur procede de preparation et leur utilisation pour le revetement de substrats metalliques
CH637325A5 (fr) Element composite resine d'olefine-metal.
FR2701268A1 (fr) Peintures à base de poudres de polyamide destinées au revêtement de profilés PVC.
EP0059136B1 (de) Uberzugsverfahren für Metallsubstrate mittels Kunststoffen und auf diese Weise erhaltene Metallkunststoffkomplexe
EP2061837A1 (de) Selbsthaftendes hochleistungspulver ohne haftmittel auf polyamidbasis
EP0011519B1 (de) Verfahren zum Beschichten von Gegenständen aus Glas oder Keramik und auf diese Weise beschichtete Flasche
EP0800557B9 (de) Pulverzusammensetzung auf basis von polyamid zur beschichtung metallischer substrate
EP0875538B1 (de) Modifizierte poröse Kieselsäure, Verfahren zu ihrer Herstellung und ihre Verwendung in Farben sowie als Träger von Pigmenten und Farbstoffen
WO1992017541A1 (en) Ethylene/vinyl alcohol coatings
EP0821039B1 (de) Selbsthaftende Zusammensetzungen mit verbesserter Kriechstromfestigkeit zur Beschichtung von Metallsubstraten
EP0354822A1 (de) Klebende Grundiermittelzusammensetzungen basierend auf Epoxid- und Methacrylharz für fluorierte Beschichtungen, ihre Verwendung zur Beschichtung von metallischen Substraten und Verfahren zu ihrer Herstellung
WO2020084252A1 (fr) Poudres de copolyamide a basse temperature de fusion
FR2533226A1 (fr) Vernis clair a base de fluorure de polyvinylidene et procede pour revetir des surfaces metalliques
FR2534881A1 (fr) Recipient metallique a joint lateral peripherique et couche de base adhesive pour sa fabrication
FR2745733A1 (fr) Nouveau revetement de surfaces metalliques et son procede de mise en oeuvre
EP0469961B1 (de) Mehrfarbige Beschichtung, Verfahren zu ihrer Herstellung, Verbundwerkstoff mit dieser Beschichtung
FR2471859A1 (fr) Feuille metallique a revetement composite de resine et poudre metallique
EP0290342B1 (de) Verwendung von thermoplastischen Zusammensetzungen in Pulverform auf der Basis von Polyamiden oder Polyetheresteramiden zum Überziehen metallischer Substrate, thermoplastiche Zusammensetzungen in Pulverform auf der Basis von Polyamiden und deren Herstellungsverfahren
FR2496502A1 (fr) Procede pour le vernissage des objets conducteurs
WO2018078275A1 (fr) Composition auto-adherente pour le revêtement de surfaces métalliques
JPS5853949B2 (ja) プラスチック被覆鋳造品の製造方法
FR3115043A1 (fr) Composition pulverulente pigmentee facilement recyclable pour le revetement de substrats

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE CH DE GB IT NL SE

AK Designated contracting states

Designated state(s): BE CH DE GB IT NL SE

17P Request for examination filed

Effective date: 19821029

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH DE GB IT LI NL SE

REF Corresponds to:

Ref document number: 3266260

Country of ref document: DE

Date of ref document: 19851024

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910125

Year of fee payment: 10

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

Ref country code: SE

Payment date: 19910208

Year of fee payment: 10

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

Ref country code: CH

Payment date: 19910227

Year of fee payment: 10

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910228

Year of fee payment: 10

Ref country code: DE

Payment date: 19910228

Year of fee payment: 10

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

Ref country code: BE

Payment date: 19910403

Year of fee payment: 10

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

Ref country code: GB

Effective date: 19920205

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

Ref country code: SE

Effective date: 19920206

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

Ref country code: BE

Effective date: 19920228

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

Ref country code: LI

Effective date: 19920229

Ref country code: CH

Effective date: 19920229

BERE Be: lapsed

Owner name: ATO CHIMIE

Effective date: 19920228

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

Ref country code: NL

Effective date: 19920901

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Effective date: 19921103

EUG Se: european patent has lapsed

Ref document number: 82400214.1

Effective date: 19920904