Aerospace series - Paints and varnishes - Two component cold curing polyurethane finish - Part 002: High chemical resistance

This European Standard specifies the requirements for a two component polyurethane finish to be applied over a primer for interior and exterior aerospace applications, where maximum resistance to normal operational fluids is required.
The properties specified in this European Standard are obtained on defined aluminium alloy test pieces prepared in accordance with EN 3837 Procedure A and EN 23270 and painted with primer to EN 2435-002. The ability of the material to be used for a specific application (e.g. alternative substrate, alternative primer, specific drying conditions etc.) shall be determined by supplementary tests to confirm that the requirements of this standard are met.

Luft- und Raumfahrt - Beschichtungsstoffe - Zweikomponenten- Polyurethan-Decklack, kalthärtend - Teil 002: Hohe Beständigkeit gegen Chemikalien

Diese Europäische Norm legt die Anforderungen an eine Zweikomponenten-Polyurethan-Deckbeschichtung fest, die auf einen Primer für Innen- und Außenanwendungen in der Luft- und Raumfahrt aufzubringen ist, für die eine maximale Beständigkeit gegenüber üblichen Betriebsflüssigkeiten erforderlich ist. Die in dieser Europäischen Norm festgelegten Eigenschaften werden an festgelegten Probenkörpern aus Aluminiumlegierung ermittelt, die nach EN 3837, Verfahren A sowie nach EN 23270 hergestellt und mit Primer nach EN 2435-002 beschichtet wurden. Die Eignung des Werkstoffes für eine bestimmte Anwendung (z. B. alternativer Trägerwerkstoff, alternativer Primer, bestimmte Trocknungsbedingungen usw.) ist durch zusätzliche Prüfungen zu ermitteln, um zu bestätigen, dass die Anforderungen dieser Norm erfüllt werden.

Série aérospatiale - Peintures et vernis - Peinture de finition polyuréthane, à deux composants polymérisant à température ambiante - Partie 002: Tenue chimiques aux fluides

Aeronavtika - Barve in laki - Dvokomponentni poliuretanski končni premaz, ki se suši pri sobni temperaturi - 002. del: Visoka kemijska odpornost

Ta evropski standard določa zahteve za dvokomponentni poliuretanski končni premaz, ki se nanese čez temeljni premaz za notranjo in zunanjo uporabo v aeronavtiki, kjer se zahteva maksimalna odpornost na običajne obratovalne tekočine. Lastnosti, določene v tem evropskem standardu, so pridobljene na definiranih preskusnih kosih aluminijeve zlitine, pripravljenih v skladu z EN 3837, Postopkom A in EN 23270 ter premazane s temeljnim premazom v EN 2435-002. Sposobnost materiala, da se uporablja za posebna področja uporabe (npr. alternativni substrat, alternativni temeljni premaz, posebni pogoji sušenja itd.) se določi z dodatnimi preskusi, s katerimi se potrdi, da so zahteve tega standarda izpolnjene.

General Information

Status
Published
Publication Date
31-Aug-2010
Withdrawal Date
30-Mar-2011
ICS
49.040 - Coatings and related processes used in aerospace industry
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 5 - Non-Metallic
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
01-Sep-2010
Completion Date
01-Sep-2010
Ref Project
SIST EN 2434-002:2010 - Aerospace series - Paints and varnishes - Two component cold curing polyurethane finish - Part 002: High chemical resistance

Overview

EN 2434-002:2010 is a CEN aerospace standard that defines requirements for a two-component cold-curing polyurethane finish with high chemical resistance. It covers paints formulated to be applied over a chromated corrosion‑resistant primer (see EN 2435-002) for both interior and exterior aircraft surfaces where maximum resistance to normal operational fluids is required. Test results described in the standard are obtained on aluminium alloy test panels prepared per EN 3837 (Procedure A) and EN 23270.

Key topics and technical requirements

  • Material type: Two-component (base + polyisocyanate activator) cold‑curing polyurethane finish; thinner allowed if required.
  • Application: Applied over primer; typical dry film thickness 50 ± 5 µm. Finish applied after primer drying 4–16 h.
  • Performance tests: Mandatory batch release and full qualification tests cover physical, mechanical and environmental behaviour (tables in the standard define required tests).
  • Chemical and fluid resistance: Exposure tests include tri-n‑butyl phosphate (EN 2379 G2) for 1 000 h (including an elevated temperature variant at 70 ± 2 °C); acceptance = no blistering, softening, lifting or other film defect.
  • Water and weathering: Water immersion (168 h at 40 ± 2 °C) and artificial weathering (UVB 313 cycle, 500 h) with limits such as ΔE ≤ 2 and gloss reduction ≤ 20%.
  • Mechanical properties: Adhesion classification ≤ 1, scratch resistance ≥ 1 500 g (primer not exposed), and slow deformation ≥ 2.5 mm with no detachment/cracking.
  • Processing & VOCs: Pot life, sedimentation, viscosity, non‑volatile content and VOC limits referenced to EN 3840; drying targets include surface dry ≤ 1 h, through dry ≤ 16 h.
  • Scope limits: Results are based on specified aluminium substrates and primer. Alternative substrates, primers or drying conditions require supplementary testing to confirm compliance.

Applications and who uses this standard

  • Aerospace paint manufacturers formulating high‑resistance polyurethane topcoats.
  • Aircraft OEMs and MRO organisations specifying durable interior/exterior finishes.
  • Procurement and quality assurance teams requiring objective acceptance criteria for batches and qualification.
  • Test laboratories performing batch release, environmental and fluid‑resistance testing.
  • Engineers developing coatings systems where operational fluid exposure and long‑term durability are critical.

Related standards

  • EN 2435-002 (corrosion‑resistant chromated primer) - required primer for the standard test system.
  • EN 3837 (surface preparation of aluminium test pieces) and EN 23270 (test panel preparation).
  • EN 3840 (technical specifications and test methods referenced throughout).

Keywords: EN 2434-002, aerospace paints, two-component polyurethane, cold curing, high chemical resistance, aircraft coatings, fluid resistance, tri-n-butyl phosphate, paint qualification, batch release.

Frequently Asked Questions

EN 2434-002:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Paints and varnishes - Two component cold curing polyurethane finish - Part 002: High chemical resistance". This standard covers: This European Standard specifies the requirements for a two component polyurethane finish to be applied over a primer for interior and exterior aerospace applications, where maximum resistance to normal operational fluids is required. The properties specified in this European Standard are obtained on defined aluminium alloy test pieces prepared in accordance with EN 3837 Procedure A and EN 23270 and painted with primer to EN 2435-002. The ability of the material to be used for a specific application (e.g. alternative substrate, alternative primer, specific drying conditions etc.) shall be determined by supplementary tests to confirm that the requirements of this standard are met.

This European Standard specifies the requirements for a two component polyurethane finish to be applied over a primer for interior and exterior aerospace applications, where maximum resistance to normal operational fluids is required. The properties specified in this European Standard are obtained on defined aluminium alloy test pieces prepared in accordance with EN 3837 Procedure A and EN 23270 and painted with primer to EN 2435-002. The ability of the material to be used for a specific application (e.g. alternative substrate, alternative primer, specific drying conditions etc.) shall be determined by supplementary tests to confirm that the requirements of this standard are met.

EN 2434-002:2010 is classified under the following ICS (International Classification for Standards) categories: 49.040 - Coatings and related processes used in aerospace industry. The ICS classification helps identify the subject area and facilitates finding related standards.

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Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Beschichtungsstoffe - Zweikomponenten, Polyurethan-Decklack, Kalthärtend - Teil 002: Hohe Beständigkeit gegen ChemikalienSérie aérospatiale - Peintures et vernis - Peinture de finition polyuréthane, à deux composants polymérisant à température ambiante - Partie 002: Tenue chimiques aux fluidesAerospace series - Paints and varnishes - Two component cold curing polyurethane finish - Part 002: High chemical resistance49.040Prevleke in z njimi povezani postopki, ki se uporabljajo v letalski in vesoljski industrijiCoatings and related processes used in aerospace industryICS:Ta slovenski standard je istoveten z:EN 2434-002:2010SIST EN 2434-002:2010en,de01-december-2010SIST EN 2434-002:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2434-002
September 2010 ICS 49.040 English Version
Aerospace series - Paints and varnishes - Two component cold curing polyurethane finish - Part 002: High chemical resistance Série aérospatiale - Peintures et vernis - Peinture de finition polyuréthane, à deux composants polymérisant à température ambiante - Partie 002: Tenue chimiques aux fluides
Luft- und Raumfahrt - Beschichtungsstoffe - Zweikomponenten- Polyurethan-Decklack, kalthärtend - Teil 002: Hohe Beständigkeit gegen Chemikalien This European Standard was approved by CEN on 6 February 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2434-002:2010: ESIST EN 2434-002:2010
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