1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2434-02 Edition P 1 October 2001 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - B-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace seri
2、es Paints and varnishes Two component cold curing polyurethane finish Part 02: High chemical resistance Srie arospatiale Luft- und Raumfahrt Peintures et vernis Anstrichstoffe deux composants Polyurethan-Decklack Peinture de finition polyurthane, Zweikomponenten polymrisant temprature ambiante Parti
3、e 02: Tenue chimiques aux fluides ka1 t h rtend Teil 02: Hohe Bestndigkeit gegen Chemikalien This “Aerospace Sedes“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs
4、of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functio
5、nally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota -Extra copies can be supplied by B.N.A.E. - Technopolis 5
6、4 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX I I I Edition approved for publication I Comments should be sent within six months after the date of Dubiication to 2001-10-31 CMA-STAN Gulledelle 94 Material Domain Mr Pays 8-1200 BRUXELLES 0 aecma 20( Page 2 prEN 2434-02: 2001 Bl
7、ank page Page 3 prEN 2434-02: 2001 O Introduction This 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 standard is a level 3 document as defined in EN 4385. Definition of subcase num
8、bering in tables 2 to 5 is given in EN 7000-9. 1 Scope This 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 spec
9、ified in this standard are obtained on defined aluminium alloy test pieces prepared in accordance with EN 3837 Procedure A and IS0 3270 and painted with primer to prEN 2435-02The ability of the material to be used for a specific application (e.g. alternative substrate, alternative primer, specific d
10、rying conditions etc.) shall be determined by supplementary tests to confirm that the requirements of this standard 0 are met. 2 Norma tive references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the ap
11、propriate places in the next and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the pub
12、lication referred to applies. IS0 1513 Paints and varnishes - Examination and preparation of samples for testing IS0 3270 Paints and varnishes and their raw materials - Temperature and humidities for conditioning and testing IS0 3696 Water for analytical laboratory use - Specification and test metho
13、ds EN 2334 Aerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloys EN 2379 Aerospace series - Fluids for assessment of non-metallic materials 1) EN 2435-02 Aerospace series - Paints and varnishes - Corrosion resistant chromated two component cold curing primer - Part 02: H
14、igh corrosion resistance 1) EN 3837 Aerospace series - Paints and varnishes - Nature and method for surface preparation of test pieces in aluminium alloys 1) EN 3840 Aerospace series - Paints and varnishes - Technical specification 1) EN 4385 Aerospace series - Non-metallic materials - General organ
15、isation of standardisation - Links between types of standards 1) EN 7000-9 Aerospace series - Non-metallic materials - Rules for the drafting and presentation of material standards - Part 9: Paints and varnishes 1) O 1) Published as AECMA Prestandard at the date of publication of this standard Page
16、4 prEN 2434-02: 2001 I .O01 Material description 1 .O02 Formulation 3 Defini tio ns Two coGnent &Id curingpolyurethane coating Base - a base containing an hydroxyl functional resin, solvents and pigments. Activator - a polyisocyanate activator solution Thinner - if required For the purposes of this
17、standard the following definition applies. Gloss finish is defined as 2 80 units measured at 60“ according to EN 3840 test 27. 1 .O04 1 .O09 I .O1 O 1 .O1 I I .O13 4 Classification Not applicable Technical specification See EN 3840. Application and use Storage stability See EN 3840. Shelf life See E
18、N 3840. Processing conditions Dry film thickness of (50 f 5) pm IS0 3270 for 7 days before testing unless otherwise specified. Finish is applied to the primer following drying of the primer for 4 h to 16 h. 5 5.1 Batch release testing For batch acceptance the tests marked with an * in tables I to 5
19、shall be performed. Batch release and qualification testing 1 .O96 1 .O97 5.2 Qualification tests For product qualification, all tests mentioned in this standard, in the tables 1 to 5, shall be performed. Identification marking See EN 3840. Flash point See EN 3840. Table 1 - General requirements - p
20、roduction These compone& shall be mixed in simple whole number proportions, by volume or by weight, in accordance with the i manufacturers instructions. 1 .O93 I Qualitv assurance 1 See EN 3840. 1 .O94 1 Designation Polyurethane Finish EN 2434-02 1 .O95 7 Packaaina )See EN3840. I .O98 I Health and s
21、afety 1 See EN 3840. Page 5 prEN 2434-02: 2001 Condition 1 IS01513 6 7 As received in original container Shall be free from extraneous matter and show no skinning, gelling, hard settlement or other defect which will prevent satisfactory application to produce 1 a defect free film. pioperties and fin
22、ish 1 None I2024-T3 clad 3 EN 3837-A:, * Sedimentation rating 7 Paint film shall show an opaque even finish, free from runs, sags, wrinkling, pinholing or other defect. EN 3840 I Test5 6 base + activator + thinner 1 EN 3840 Test 20 followed by Test 8 a or Test 9 a 6 7 base + activator + thinner sorP
23、as EN 3840 I 2 x initiai value after 4 h 1 6 7 Test IO base + activator Pm EN 3840 Gloss finish I 15, other gloss levels 5 30 1 6 Test 8 a or Test 9 a base + activator + thinner 1 EN 3840 Test 1 Volatile organic % If2bC II2 bc EN 3840 com pou ni WOC) content I 1 Test49 I Density 6 7 g/l I I referenc
24、e value 1 Test3 6 base base + activator + thinner EN 3840 Table 2 - Physical and chemical characteristics 2.014 * li 2.01 I ADDiication II I l 4 I EN 3837 Process A I EN 2334 Pickle I 5 I EN 2435-02 primer + finish to this standard 2.034 E= I 30after 4 h Pot life 2.012 * 2.035 Fineness of grind * 2.
25、029 viscosity Non volatile matter 2.027 1-7 I I base I activator 2.027 2.057 * 1 7 Ig/cm3 continued i Page 6 prEN 2434-02: 2001 lensity iydrometer Table 2 - Physical and chemical characteristics (concluded) EN 3840 1 Test4 lash point Surface dry time . _ 6 I activator + thinner EN 3840 1 Test7 7 bas
26、e activator thinner “C 2 reference value 2 reference value 2 reference value EN 3840 I Test21 3 EN3837-Ap 2024-T3 clad 4 EN 3837 Process A EN 2334 Pickle 5 6 IS03270 EN 2435-02 primer + finish to this standard 171 I activator I thinner 3 4 5 6 EN3837-A2 2024-T3 clad EN 3837 Process A EN 2435-02 prim
27、er +finish to this standard IS03270 EN 2334 Pickle d 1 3rying time I IN3840 2rint-free - EN 3840 Test23 3 I 7 Ih EN3837-A2 I2024-T3 clad (56 6 7h Through dry time IS03270 I 16 * Notes I 4 lEN3837ProcessA I EN 2334 Pickle I 5 1 EN 2435-02 primer +finish to this standard 1 Page 7 prEN 2434-02: 2001 Co
28、lour I EN 3840 1 3 Test 30 EN3837-A2 I2024-T3 clad 5 6 EN 2435-02 primer + finish to this standard IS03270 1 EN 3840 Test27 3 4 EN3837-Ap 2024-13 clad EN 3837 Process A EN 2334 Pickle 5 6 EN 2435-02 primer + finish to this standard IS03270 * I 7 Gloss units shall match the gloss specified 1 EN 3840
29、Test24 3 4 EN3837-A2 2024-T3 clad EN 3837 Process A EN 2334 Pickle 1 EN 3840 Test29 3 4 EN3837-A2 2024-T3 clad EN 3837 Process A EN 2334 Pickle 6 7 IS03270 2 1 500 CI primer not exposed 6 7 IS0 3276 2 2,5 mm no detachment or cracking 3.084 or 3.053 I 4 I EN 3837 Process A I EN 2334 Pickle * 1 7l 1 s
30、hall match the colour specified 3.088 or 3.083 Gloss 60“ Table 4 - Mechanical characteristics 4.082 Adhesion 5 I EN 2435-02 primer + finish to this standard 6 (IS03270 4.076 Scratch resistance 5 I EN 2435-02 primer + finish to this standard * Slow deformation 4.082 I EN 3840 1 (Test46 3 I EN 3837 -A
31、2 I2024-T3 clad 4 I EN 3837 Process A 1 EN 2334 Pickle 71F2435-02 primer + finish to this standard * Page 8 prEN 2434-02: 2001 1 Table 5 - Environmental characteristics EN 3840 Test35 Resistance to fluids - a 3 4 Water behaviour EN 3837-A2 2024-T3 clad EN 3837 Process A EN 2334 Pickle Artificial wea
32、thering 5 Notes EN 2435-02 primer + finish to this standard, panel scribed to substrate immediately before testing. 6 7 A tri-n-butyl phosphate to EN 2379 G2 for 1 O00 h (IS0 3270) a B tri-n-butyl phosphate to EN 2379 G2 for I O00 h at (70 I 2) OC a No blistering, softening, lifting or other film de
33、fect Test 29 2 1 200 g primer not exposed EN 3840 1 3 Test34 EN3837-A2 I2024-T3 clad 7 EN 3837 Process A EN 2435-02 primer + finish to this standard, panel scribed to substrate immediately before testing. water to IS0 3696 Grade 2 for 168 h at (40 * 2) OC I EN 2334 Pickle No blistering, softening, l
34、ifting or other film defect Test 24 Classification I 1 Test 29 2 1 500 g primer not exposed EN 3840 1 3 Test40 EN 3837-A2 12024-13 clad 4 5 6 -4 h light/4hhumidityltotal h EN 3837 Process A EN 2435-02 primer + finish to this standard I EN 2334 Pickle 7 a e Test 27 I 20 YO reduction from initial value. Test 30 AE I 2 units
