1、AECMA STANDARD NORME AECMA AECMA NORM prEN 4406 Edition P 2 March 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: Supersedes edition P 1 October 2001 Descriptor
2、s: ENGLISH VERSION Aerospace series Paints and varnishes Two component cold curing polyurethane coating Abrasion resistant Srie arospatiale Peintures et vernis Peinture de finition polyurthane deux composants polymrisant temprature ambiante Rsistance labrasion Luft- und Raumfahrt Anstrichstoffe Zwei
3、komponenten Polyurethan-Decklack Kalthrtend Abriebfest This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been tech
4、nically 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 functionally, without re-identification of the standard. Af
5、ter examination and review by users and formal agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN a
6、t national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 31 March 2005 Comments should be sent within six months after the date of publication to AECMA-STAN Non-metallic Material Domain Cop
7、yright 2005 by AECMA-STAN Page 2 prEN 4406:2005Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Non-metallic Material Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA-STANs General Process Manual, this sta
8、ndard has received approval for Publication. Contents Page Introduction 3 1 Scope 3 2 Normative references. 3 3 Definitions. 4 4 Classification. 4 5 Batch release and qualification testing. 4 5.1 Batch release testing 4 5.2 Qualification tests 4 Page 3 prEN 4406:2005Introduction This standard has be
9、en prepared in accordance with TR 7000-9. 1 Scope This standard specifies the requirements for a two component polyurethane, abrasion resistant coating available in a range of colours and levels of gloss, to be applied over a primer for aerospace applications offering resistance to wear on sliding s
10、urfaces and resistance to impact from solid particles. The properties specified in this standard are obtained on defined aluminium alloy test pieces prepared in accordance with EN 3837 Procedure A and ISO 3270 and painted with primer to EN 2435. The ability of the material to be used for a specific
11、application (eg 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 indispensable for the application of this do
12、cument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1513, Paints and varnishes Examination and preparation of samples for testing. ISO 3270, Paints and varnishes and their raw mate
13、rials Temperatures and humidities for conditioning and testing. ISO 3696, Water for analytical laboratory use Specification and test methods EN 2334, Aerospace series Chromic-sulphuric acid pickle of aluminium and aluminium alloys. EN 2379, Aerospace series Fluids for assessment of non-metallic mate
14、rials 1). EN 2434 (all parts), Aerospace series Paints and varnishes Two component cold curing polyurethane finish 1). EN 2435 (all parts), Aerospace series Paints and varnishes Corrosion resistant chromated two component cold curing primer 1). EN 3837, Aerospace series Paints and varnishes Nature a
15、nd method for surface preparation of test pieces in aluminium alloys 1). EN 3840, Aerospace series Paints and varnishes Technical specification 1). TR 7000-9, Aerospace series Non-metallic materials Rules for the drafting and presentation of material standards Part 9: Paints and varnishes 2). STANAG
16、 4477, Specification for paints and paint systems, resistant to chemical agents and decontaminants, for the protection of aerospace military equipment. 1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published as AECMA Technical Report at the date of publication of
17、this standard. Page 4 prEN 4406:20053 Definitions None applicable. 4 Classification The coating is classified according to the degree of chemical resistance required. Type A : resistant to phosphate ester hydraulic fluid; Type B : for military use. 5 Batch release and qualification testing 5.1 Batch
18、 release testing For batch acceptance the tests marked with an * shall be performed. 5.2 Qualification tests For product qualification, all tests mentioned in this standard, in the Tables 1 to 5, shall be performed. NOTE If the product is formulated by the addition of abrasion resisting ingredient t
19、o a product already approved to the appropriate part of EN 2434 without change to the base resin or activator components then only tests in the Tables 1 to 4 need be performed to prove compliance with this standard. Page 5 prEN 4406:2005Table 1 General requirements Characteristic number Characterist
20、ic Requirements 1.001 Material description Two component cold curing polyurethane coating with resistance to abrasion 1.002 Formulation Base : a base containing an hydroxyl functional resin, solvents and pigments to give the required colour and gloss and other ingredients to give abrasion resistance
21、. Activator : a polyisocyanate activator solution. Thinner : 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 EN 3840 1.009 App
22、lication and use Dry film thickness of (200 25) m 1.010 Storage stability See EN 3840. 1.011 Shelf life See EN 3840. 1.013 Drying conditions ISO 3270 for seven days before testing unless otherwise specified. Polyurethane abrasion resistant coating is applied to the primer following drying of the pri
23、mer for 4 h to 16 h. 1.093 Quality assurance See EN 3840. 1.094 Designation Polyurethane abrasion resistant coating. EN 4406 - Type A or Type B. 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
24、 and chemical characteristics Characteristic number Characteristic Requirement2.008 1 ISO 1513 Freedom from defects 6 As received in original container. * 7 Shall be free from extraneous matter and show no skinning, gelling, hard settlement or other defect which will prevent satisfactory application
25、 to produce a defect free film. The base component and activator component shall each be in a condition such that stirring easily produces a smooth, uniform consistency which, after mixing in the proportions specified by the manufacturer, shall be suitable for spray application. 2.009 Application an
26、d use 1 None 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 7 Paint film shall show an opaque even finish, free from runs, sags, wrinkling, pinholing or other defect. continued Page 6 prEN 4406:2005Table 2 (concluded
27、) Characteristic number Characteristic Requirement 2.107 EN 3840 Reactivity viscosity (flow time) 1 Test 5 6 base + activator + thinner *7 Ml 2 initial value after 4 h 2.104 EN 3840 Composition Non volatile matter 1 Test 1 7 Base Activator % 2 a, b 2 a, b2.104 EN 3840 1 Test 49 Composition Volatile
28、organic content 6 base + activator + thinner 7 g/l reference value a, b2.301 Density EN 3840 1 Test 3 6 Base *7 g/cm3 2 a, b, c2.301 EN 3840 Density hydrometer 1 Test 4 6 activator + thinner *7 Activator Thinner g/cm3 2 a, b 2 a, b2.109 Flammability Flash point EN 3840 1 Test 7 *7 Base Activator Thi
29、nner C reference value b reference value b reference value b2.106 EN 3840 Reactivity Through dry 1 Test 23 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 6 ISO 3270 *7 H 16 2.999 Notes a The deviation is that compare
30、d to the reference value. b The reference value is that established during qualification. c Test could also be used for activator and thinner if required. Page 7 prEN 4406:2005Table 3 Physico - chemical characteristics Characteristic number Characteristic Requirement 3.111 EN 3840 Optical properties
31、 Colour 1 Test 30 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 6 ISO 3270 *7 dE Shall match the colour specified by the purchaser. 3.111 EN 3840 Optical properties Specular gloss 1 Test 27 60gloss meter 3 EN 3837 -
32、 A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 6 ISO 3270 *7 Gloss units Shall match the gloss specified by the purchaser. Page 8 prEN 4406:2005Table 4 Mechanical characteristics Characteristic number Characteristic Requirement
33、4.304 EN 3840 Adhesion Cross-cut 1 Test 24 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 6 ISO 3270 7 Classification 1 4.304 EN 3840 Adhesion Scratch resistance 1 Test 29 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc.
34、A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 6 ISO 3270 *7 1 800 g primer not exposed 4.320 EN 3840 Tribological Abrasion resistance 1 Test 47 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating t
35、o this standard 6 ISO 3270 * 7 Gloss coatings 0,1g after 10 000 cycles 1 000 g load CS 10 wheel, resurface with No. S-11 disc every 1 250 cycles. Other coatings 0,4g after 10 000 cycles 1 000 g load CS 10 wheel, resurface with No. S-11 disc every 1 250 cycles. Page 9 prEN 4406:2005Table 5 Environmen
36、tal characteristics Characteristic number Characteristic Requirement 5.501 EN 3840 1 Test 37 Water absorption Humidity absorption 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Procedure A EN 2334 Pickle 5 EN 2435-4 primer + coating to this standard 6 (40 2) C , (100 5) % r.h. 1 000 h 7 No blistering, soften
37、ing, lifting or other film defect. Test 24 1 5.502 EN 3840 1 Test 35 Resistance to aeronautical fluids scratch resistance a3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard, panel scribed to substrate immediately before
38、 testing. 6 Type A Tri-n-butyl phosphate to EN 2379G2 for 168 h at (70 2) C Resistance to fluids aType B NATO H-515 for 168 h (ISO 3270) 7 No blistering, softening, lifting or other film defect Test 29 Type A 1 000 g primer not exposed Type B 1 500 g primer not exposed 5.515 EN 3840 Water resistance
39、 absorption 1 Test 34 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Procedure A EN 2334 Pickle 5 EN 2435-4 primer + coating to this standard, panel scribed to substrate immediately before testing. 6 water to ISO 3696 Grade 2 for 168 h at (40 2) C 7 No blistering, softening, lifting or other film defect Test
40、 29 1 500 g metal not exposed 5.508 Ageing Artificial EN 3840 1 Test 40 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-4 primer + coating to this standard 6 UVB 313, light 4 h humidity 4 h for 500 h 7 Test 27 20 % reduction from initial value. Test 30
41、E 2 units continued Page 10 prEN 4406:2005Table 5 (concluded) Characteristic number Characteristic Requirement 5.501 EN 3840 1 STANAG 4477 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC Resistance to Aeronautical Fluids Resistance to biological and chemical agen
42、ts (Type B only) 5 EN 2435-5 primer + coating to this standard 6 STANAG 4477, method 8c 7 1) No blistering or detachment (10 mag.) 2) Primer not exposed 3) No cracking or detachment (10 mag.) 5.501 EN 3840 Resistance to Aeronautical Fluids Resistance to biological and chemical agents (Type B only) 1
43、 STANAG 4477 3 EN 3837 - A2 2024-T3 clad 4 EN 3837 Proc. A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-5 primer + coating to this standard 6 STANAG 4477, method 7c 7 1) No blistering or detachment (10 mag.) 2) Primer not exposed 3) No cracking or detachment (10 mag.) 5.999 Notes a Additional fluids shall be subject of agreement between the manufacturer and the user.
