1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 2434-002:2010Aerospace series Paints andvarnishes Two componentcold curing polyurethane finishPart 002: High chemical resistanceBS EN 2434-002:2010 BRITISH STANDARDNational
2、 forewordThis British Standard is the UK implementation of EN 2434-002:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65/-/3, Paints for Aerospace Purposes.A list of organizations represented on this committee can beobtained on request to its secretary.This publ
3、ication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 69555 1ICS 49.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the autho
4、rity of theStandards Policy and Strategy Committee on 30 November 2010.Amendments issued since publicationDate Text affectedBS EN 2434-002:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2434-002 September 2010 ICS 49.040 English Version Aerospace series - Paints and varnishes - Two compone
5、nt cold curing polyurethane finish - Part 002: High chemical resistanceSrie arospatiale - Peintures et vernis - Peinture de finition polyurthane, deux composants polymrisant temprature ambiante - Partie 002: Tenue chimiques aux fluides Luft- und Raumfahrt - Beschichtungsstoffe - Zweikomponenten- Pol
6、yurethan-Decklack, kalthrtend - Teil 002: Hohe Bestndigkeit 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 nati
7、onal 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
8、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,
9、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 COMIT EUROPEN DE NORMA
10、LISATION EUROPISCHES KOMITEE FR 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: EBS EN 2434-002:2010EN 2434-002:2010 (E) 2 Contents Page Foreword 3Int
11、roduction .41 Scope 42 Normative references 43 Terms and definitions .54 Classification 55 Batch release and qualification testing .55.1 Batch release testing .55.2 Qualification tests 5BS EN 2434-002:2010EN 2434-002:2010 (E) 3 Foreword This document (EN 2434-002:2010) has been prepared by the Aeros
12、pace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior
13、 to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011. Attention is drawn to th
14、e possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following count
15、ries are bound to implement this European Standard: 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, Slove
16、nia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 2434-002:2010EN 2434-002:2010 (E) 4 Introduction This European Standard is part of a series of EN non-metallic materials standards for aerospace applications. The general organisation of this series is described in EN 4385. This European
17、Standard is a level 3 document as defined in EN 4385. Definition of subcase numbering in Table 2 to Table 5 is given in EN 7000-9. 1 Scope This European Standard specifies the requirements for a two component polyurethane finish to be applied over a primer for interior and exterior aerospace applica
18、tions, 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 mat
19、erial 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. 2 Normative references The following referenced documents are indispensa
20、ble for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2334, Aerospace series Chromic-sulphuric acid pickle of aluminium and aluminium alloys EN 2379,
21、 Aerospace series Fluids for assessment of non-metallic materials 1)EN 2435-002, Aerospace series Paints and varnishes Corrosion resistant chromated two component cold curing primer Part 002: High corrosion resistance EN 3837, Aerospace series Paints and varnishes Nature and method for surface prepa
22、ration of test pieces in aluminium alloys 1) EN 3840, Aerospace series Paints and varnishes Technical specification EN 4385, Aerospace series Non-metallic materials General organisation of standardisation Links between types of standards 1) EN 7000-9, Aerospace series Non-metallic materials Rules fo
23、r the drafting and presentation of material standards Part 9: Paints and varnishes 1) EN ISO 1513, Paints and varnishes Examination and preparation of samples for testing (ISO 1513:1992) 1)Published as ASD-STAN Prestandard at the date of publication of this standard BS EN 2434-002:2010EN 2434-002:20
24、10 (E) 5 EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696:1987) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Gloss finish 80 units measured at 60 according to EN 3840 test 27 4 Classification Not ap
25、plicable. 5 Batch release and qualification testing 5.1 Batch release testing For batch acceptance the tests marked with an * in Table 1 to Table 5 shall be performed. 5.2 Qualification tests For product qualification, all tests mentioned in this European Standard, in the Table 1 to Table 5, shall b
26、e performed. BS EN 2434-002:2010EN 2434-002:2010 (E) 6 Table 1 General Requirements 1.001 Material description Two component cold curing polyurethane coating 1.002 Formulation Base a base containing an hydroxyl functional resin, solvents and pigments. Activator a polyisocyanate activator solution Th
27、inner if required 1.003 Form and method of production These components shall be mixed in simple whole number proportions, by volume or by weight, in accordance with the manufacturers instructions. 1.004 Technical specification See EN 3840 1.009 Application and use Dry film thickness of (50 5) m 1.01
28、0 Storage stability See EN 3840 1.011 Shelf life See EN 3840 1.013 Processing conditions ISO 3270 for 7 d before testing unless otherwise specified. Finish is applied to the primer following drying of the primer for 4 h to 16 h. 1.093 Quality assurance See EN 3840 1.094 Designation Polyurethane Fini
29、sh EN 2434-02 1.095 Packaging See EN 3840 1.096 Identification marking See EN 3840 1.097 Flash point See EN 3840 1.098 Health and safety See EN 3840 Table 2 Physical and chemical characteristics 2.014 Condition 1 EN ISO 1513 6 As received in original container * 7 Shall be free from extraneous matte
30、r and show no skinning, gelling, hard settlement or other defect which will prevent satisfactory application to produce a defect free film. 2.011 Application properties and finish 1 None 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard * 7 Pain
31、t film shall show an opaque even finish, free from runs, sags, wrinkling, pinholing or other defect.2.034 Sedimentation rating EN 3840 1 Test 5 6 base + activator + thinner 7 ml V = 30 after 4 h 2.012 Pot life EN 3840 1 Test 20 followed by Test 8 aor Test 9 a6 base + activator + thinner * 7 s or Pa
32、s 2 x initial value after 4 h 2.035 Fineness of grind EN 3840 1 Test 10 6 base + activator * 7 m Gloss finish 15, other gloss levels 30 (continued) BS EN 2434-002:2010EN 2434-002:2010 (E) 7 Table 2 Physical and chemical characteristics (concluded) 2.029 Viscosity EN 3840 1 Test 8 1or Test 9 16 base
33、+ activator + thinner 7 s or Pa s 10 % 1, 22.027 Non volatile matter EN 3840 1 Test 1 7 base activator % 2 2, 3 2 2, 32.027 Volatile organic compound (VOC) content EN 3840 1 Test 49 6 base + activator + thinner 7 g/l reference value 2, 32.057 Density EN 3840 1 Test 3 6 base * 7 g/cm3 2 2, 3, 52.057
34、Density hydrometer EN 3840 1 Test 4 6 activator + thinner 7 activator thinner * g/cm3 2 2, 3 2 2,32.036 Flash point EN 3840 1 Test 7 7 base activator thinner C reference value 3 reference value 3 reference value 32.041 Surface dry time EN 3840 1 Test 21 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN
35、 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 7 h 1 42.041 Drying time print-free EN 3840 1 Test 22 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 7 h 6 2.041 Through dry time EN 38401 Test 23 3 EN 3837 A220
36、24-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 * 7 h 16 2.999 Notes 1 Test 8 shall be used for non-thixotropic paints and test 9 for thixotropic paints. 2The deviation is that compared to the reference value. 3 The reference value is that establ
37、ished during qualification. 4Unless otherwise specified. 5 Test could also be used for activator and thinner if required. BS EN 2434-002:2010EN 2434-002:2010 (E) 8 Table 3 Physico Chemical characteristics 3.084 or 3.053 Colour EN 3840 1 Test 30 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pic
38、kle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 * 7 E shall match the colour specified 3.088 or 3.083 Gloss 60 EN 3840 1 Test 27 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 * 7 Gloss units shall match the gloss spec
39、ified Table 4 Mechanical characteristics 4.082 Adhesion EN 3840 1 Test 24 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 7 Classification 1 4.076 Scratch resistance EN 38401 Test 29 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 23
40、34 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 * 7 1 500 g primer not exposed 4.082 Slow deformation EN 3840 1 Test 46 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 EN 23270 * 7 2,5 mm no detachment or cracking BS EN 24
41、34-002:2010EN 2434-002:2010 (E) 9 Table 5 Environmental characteristics 5.100 Resistance to fluids aEN 3840 1 Test 35 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard, panel scribed tosubstrate immediately before testing.6 A tri-n-butyl phospha
42、te to EN 2379 G2 for 1 000 h (EN 23270) 1B tri-n-butyl phosphate to EN 2379 G2 for 1 000 h at (70 2) C 17 No blistering, softening, lifting or other film defect Test 29 1 200 g primer not exposed 5.101 Water behaviour EN 3840 1 Test 34 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN
43、2435-02 primer + finish to this standard, panel scribed to substrate immediately before testing. 6 water to EN ISO 3696 Grade 2 for 168 h at (40 2) C 7 No blistering, softening, lifting or other film defect Test 24 Classification 1 Test 29 1 500 g primer not exposed 5.106 Artificial weathering EN 38
44、40 1 Test 40 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-02 primer + finish to this standard 6 UVB 313, 4 h light/4 h humidity/total 500 h 7 Test 27 20 % reduction from initial value. Test 30 E 2 units 5.999 Notes 1 Additional fluids shall be subject of agreement between the
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