1、o e Edition approved for publication 2001 -1 0-31 e e Comments should be sent within six months after the date of publication to Gulledelle 94 AECMA-STAN B-1200 BRUXELLES AECMA STANDARD NORME AECMA AECMA NORM prEN 2434-04 August 2001 Edition P 1 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE IND
2、USTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - B-1200 BRUXELLES - Tel. (c32) 2 775 81 10 - Fax. (c32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace series Paints and varnishes Two component cold curing polyurethane finish Part 04: High flexibility Srie arospatiale Peintures et vern
3、is Peinture de finition polyurthane, a deux composants polymrisant temprature ambiante Partie 04: Haute flexibilit Luft- und Raumfahrt Anstrichstoffe Zwei komponenten Polyurethan-Decklack ka1 th rtend Teil 04: Hohe Elastizitt This “Aerospace Series Prestandard has been drawn up under the responsibil
4、ity of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs 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
5、 this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, 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 Sta
6、ndard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX I I Material Domain Mr Pays 0 aecma 20C Page 2 prEN 2434-04: 2001 Blank page Page 3 prEN 2434-04:
7、 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 for subcase numbering in tables 2 to 5, is
8、given in EN 7000-9. 1 Scope This standard specifies the requirements for a two component polyurethane finish to be applied over a primer mainly for exterior aerospace applications, offering high flexibility The properties specified in this standard are obtained on defined aluminium alloy test pieces
9、 prepared in accordance with EN 3837 and IS0 3270 and painted with primer to prEN 2435-02. 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 th
10、e requirements of this standard are met. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the next and the publications are listed hereafter. For dated refer
11、ences, 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 publication referred to applies. IS0 1513 IS0 3270 IS0 3696 EN 2334 EN 2379 EN 2435-02 EN
12、3837 EN 3840 EN 4385 EN 7000-9 Paints and varnishes - Examination and preparation of samples for testing Paints and varnishes and their raw materials - Temperature and humidities for conditioning and testing Water for analytical laboratory use - Specification and test methods Aerospace series - Chro
13、mic-sulphuric acid pickle of aluminium and aluminium alloys Aerospace series - Fluids for assessment of non-metallic materials 1) Aerospace series - Paints and varnishes - Corrosion resistant chromated two component cold curing primer - Part 02: High corrosion resistance 1) Aerospace series - Paints
14、 and varnishes - Nature and method for surface preparation of test pieces in aluminium alloys 1) Aerospace series - Paints and varnishes - Technical specification 1) Aerospace series - Non-metallic materials - General organisation of standardisation - Links between types of standards 1) Aerospace se
15、ries - Non-metallic materials - Rules for the drafting and presentation of material standards - Part 9: Paints and varnishes 1) 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 2434-04: 2001 See EN 3840. 3 Definitions IS0 3270 for 7 days before testing unless
16、 otherwise specified. Finish is applied to the primer following drying of the primer for 14 h to 16 h. For the purposes of this standard. Gloss finish is defined as 1 80 units measured at 60“ according to EN 3840 test 27. Quality assurance Designation 4 Class if ica t ion See EN 3840. Polyurethane F
17、inish EN 2434-04 Not applicable 1 .O96 1 .O97 I .O98 5 Batch release and qualification testing Identification marking See EN 3840. Flash point See EN 3840. Health and safety See EN 3840. 5.1 Batch release testing * For batch acceptance the tests marked with an in tables 1 to 5 shall be performed. 5.
18、2 Qualification tests For product qualification, all tests mentioned in this standard, in the tables 1 to 5, shall be performed. Table I - General requirements I 1.001 1 .O02 Material description Formula tion - Two component cold curing polyurethane coating Base - a base containing an hydroxyl funct
19、ional resin, solvents and pigments. Activator - a polyisocyanate activator solution Thinner - if required 1.003 I - 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. I .O04 1 .o
20、09 1.010 I .o1 I 1.013 Technical specification Application and use Storage stability Shelf life Processing conditions EN 3840 Dry film thickness of (50 f 5) um See EN 3840. I 1.093 1 leog4 - keeEN 3840. EN 3837 - A2 :N 3837 Process A or B or C 2024-T3 clad EN 2334 Pickle or CM or CCC ;orPas 5 2 x in
21、itial value after 4 h dm Gloss finish I 15, other gloss levels 5 30 Page 5 prEN 2434-04: 2001 Table 2 - Physical and chemical characteristics :” 2.014 4s received in original container Shall be free from extraneous matter and show no skinning, gelling, hard ;ettlement or other defect which will prev
22、ent satisfactory application to produce i defect free film. 17 * - - 4pplication )roperties 2.01 1 done 1 ind finish * 3 4 - 5 EN 2435-02 primer + finish to this standard 7 - aint film shall show an opaque even finish, free from runs, sags, wrinkling, inholing or other defect. 5N 3840 2.034 Sediment
23、ation .sting I 6 7 - - rest 5 lase + activator + thinner - nl -(V3Ozer 4 h Dot life * IN 3840 rest 20 followed by Test 8 a or Test 9 a 2.01 2 1 6 - iase + activator + thinner 7 - - 1 6 - =ineness of grind * 2.035 7 - 2.029 viscosity 1 rest 8 a or Test 9 a base + activator + thinner sorPas I-+ 10 Yo
24、bc 6 7 - - , 2.027 Non volatile matter I 7 - Test 1 I base I activator rj % l-r2bc 1+2bc I l EN 3840 Test 49 base + activator + thinner g/l I I reference value EN 3840 Test 3 2.027 Volatile organic compound (VOC) content - 1 6 7 Density 2.057 - 1 6 7 - - * Zontinued Page 6 prEN 2434-04: 2001 activat
25、or f2bc thinner i12bC Surface dry time EN 3840 1 Test21 _ _ - 3 4 EN3837-A2 2024-T3 clad EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC Drying time print-free EN 3840 I Test22 3 4 EN 3837-A2 2024-T3 clad EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC 5 6 Finish to this standard I
26、S03270 Through dry time 7h 56 EN 3840 1 Test23 3 EN3837-Ap 12024-T3 clad Table 2 - Physical and chemical characteristics (concluded) lensiiy iydrometer I I EN 3840 I 1 Test4 1 6 I activator + thinner * F , cl/cm3 k =lash point EN 3840 Test 7 I I base I activator I thinner I - 1% I 2 reference value
27、12 reference value I 2 reference value r5 I Finich to this standard I 6 Ils03270 EN 3837 Process A or B or C Finish to this standard I EN 2334 Pickle or CAA or CCC 1-6 IISO3270 * I 7 Ih Is 16 , Notes a Test 8 shall be used for non-thixotropic paints and test 9 for thixotropic paints. The deviation i
28、s that compared to the reference value. The reference value is that established during qualification. Unless otherwise specified. Test could also be used for activator and thinner if required. e Page 7 prEN 2434-04: 2001 Table 3 - Physic0 - chemical characteristics 3.084 or 3.053 3.088 or 3.083 - 4.
29、082 4.076 4.082 4.080 4.082 Table 4 - Mechanical characteristics ,esistanCe Page 8 prEN 2434-04: 2001 iesistance to luids a flater behaviour Artificial 3 EN3837-A2 12024-T3 clad 4 5 6 7 EN 3837 Process A or B & C EN 2435-02 primer + finish to this standard (40 2) OC, (100 f 5) Yo r.h. 500 h No blist
30、ering, softening, lifting or other film defect Test 24 I 1 EN 3840 I EN 2334 Pickle or CAA & CCC 1 Test35 3 EN 3837-Aq 2024-T3 clad 4 EN 3837 Process A or B & C 5 EN 2435-02 primer + finish to this standard, panel scribed to substrate immediately before testing. 6 A B 7 No blistering, softening, lif
31、ting or other film defect Test 29 2 1 O00 g primer not exposed EN 3840 EN 2334 Pickle or CAA & CCC tri-n-butyl phosphate to EN 2379 G2 for 168 h (IS0 3270) a tri-n-butyl phosphate to EN 2379 G2 for 168 h at (70 I 2) OC a 1 Test34 3 EN3837-Ap 2024-T3 clad 4 5 6 7 EN 3837 Process A or B & C EN 2435-02
32、 primer + finish to this standard, panel scribed to substrate immediately before testing. water to IS0 3696 Grade 2 for 168 h at (40 f 2) OC No blistering, softening, lifting or other film defect Test 24 Classification I 1 Test 29 2 1 500 g primer not exposed EN 3840 EN 2334 Pickle or CAA & CCC weat
33、hering 1 3 4 Test40 EN 3837-A2 2024-T3 clad EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC TEN 2435-02 primer +finish to this standard UV6 313,4 h light/4 h humidityltotal500 h 6 Notes 7 Test 27 I 20 ?Ao reduction from initial value. Test 30 BE I 2 units a treatment shall be the subject of agreement between manufacturer and user. Additional fluids shall be subject of agreement between the manufacturer and the user. Pre-treatments specified shall be used for qualification testing. For batch testing pre
