1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4476:2011Aerospace series Paintsand varnishes Cold curingintermediate coatBS EN 4476:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of
2、 EN 4476:2011.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes(excluding textiles).A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to in
3、clude all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 73883 8ICS 49.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy an
4、d Strategy Committee on 31 May 2011.Amendments issued since publicationDate Text affectedBS EN 4476:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4476 May 2011 ICS 49.040 English Version Aerospace series - Paints and varnishes - Cold curing intermediate coat Srie arospatiale - Peintures e
5、t vernis - Couche intermdiaire polymrisant temprature ambiante Luft- und Raumfahrt - Beschichtungsstoffe - Zwischenbeschichtung, kalthrtend This European Standard was approved by CEN on 3 March 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condit
6、ions 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-CENELEC Management Centre or to any CEN member. This European Standard exists
7、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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standa
8、rds 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 Un
9、ited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4476:2011:
10、 EBS EN 4476:2011EN 4476:2011 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .64 Classification 65 Batch release and qualification testing .65.1 Batch release testing .65.2 Qualification tests 76 Designation . 12Annex A (normative) Method for th
11、e determination of ability to selectively remove the finish 13Annex B (normative) Method for the determination of ability to restore the paint system after removal 14Annex C (normative) Composition of reference paint remover 15Bibliography . 16BS EN 4476:2011EN 4476:2011 (E) 3 Foreword This document
12、 (EN 4476:2011) has been prepared by the Aerospace 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
13、Services of the member countries of ASD, prior 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 November 2011, and conflicting national standards shall be withdrawn at t
14、he latest by November 2011. Attention is drawn to the 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 nat
15、ional standards organizations of the following countries 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
16、, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 4476:2011EN 4476:2011 (E) 4 Introduction This European Standard has been prepared in accordance with AECMA TR 7000-9. BS EN 4476:2011EN 4476:2011 (E) 5 1 Scope This European Standard spe
17、cifies the requirements for a two component polyurethane, topcoat, with a medium degree of resistance to erosion by the effects of rain, available in a range of colours and levels of gloss, to be applied over a primer for aerospace applications on areas where rain erosion at subsonic speeds may be a
18、 problem, e.g. leading edges and air intakes. 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 2435-001 and -002. The ability of the material to be used fo
19、r a specific application (e.g. alternative substrate, alternative primer, specific drying conditions, etc.) should be determined by supplementary tests to confirm that the requirements of this European Standard are met. 2 Normative references The following referenced documents are indispensable for
20、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, Aerospa
21、ce series Fluids for assessment of non-metallic materials1EN 2434-004, Aerospace series Paints and varnishes Two component cold curing polyurethane finish Part 004: High flexibility EN 2435-002, Aerospace series Paints and varnishes Corrosion resistant chromated two component cold curing primer Part
22、 002: High corrosion resistance EN 3696, Aerospace series Washers in heat resisting steel EN 3837, Aerospace series Paints and varnishes Nature and method for surface preparation of test pieces in aluminium alloys1)EN 3840, Aerospace series Paints and varnishes Technical specification EN 4160, Aeros
23、pace series Paints and varnishes Determination of the effect of thermal exposure EN 23270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing (ISO 3270:1984) EN ISO 1513, Paints and varnishes Examination and preparation of test samples (ISO 1513:201
24、0) EN ISO 1518, Paints and varnishes Scratch test (ISO 1518:1992) EN ISO 1520, Paints and varnishes Cupping test (ISO 1520:2006) EN ISO 2409, Paints and varnishes Cross-cut test (ISO 2409:2007) EN ISO 2431, Paints and varnishes Determination of flow time by use of flow cups (ISO 2431:1993, including
25、 Technical Corrigendum 1:1994) EN ISO 2811 (all parts), Paints and varnishes Determination of density (ISO 2811 series) 1In preparation at the date of publication of this European Standard. BS EN 4476:2011EN 4476:2011 (E) 6 EN ISO 2813, Paints and varnishes Determination of specular gloss of non-met
26、allic paint films at 20, 60 and 85 (ISO 2813:1994, including Technical Corrigendum 1:1997) EN ISO 2884-1, Paints and varnishes Determination of viscosity using rotary viscometers Part 1: Cone-and-plate viscometer operated at a high rate of shear (ISO 2884-1:1999) EN ISO 3251, Paints, varnishes and p
27、lastics Determination of non-volatile-matter content (ISO 3251:2008) EN ISO 3675, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method (ISO 3675:1998) EN ISO 3679, Determination of flash point Rapid equilibrium closed cup method (ISO 3679:2004) EN ISO 3
28、680, Determination of flash/no flash Rapid equilibrium closed cup method (ISO 3680:2004) EN ISO 6272-1, Paints and varnishes Rapid-deformation (impact resistance) tests Part 1: Falling-weight test, large-area indenter (ISO 6272-1:2002) EN ISO 9117-1, Paints and varnishes Drying tests Part 1: Determi
29、nation of through-dry state and through-dry time (ISO 9117-1:2009) EN ISO 9117-3, Paints and varnishes Drying tests Part 3: Surface-drying test using ballotini (ISO 9117-3:2010) EN ISO 9514, Paints and varnishes Determination of the pot life of multicomponent coating systems Preparation and conditio
30、ning of samples and guidelines for testing (ISO 9514:2005) EN ISO 11507, Paints and varnishes Exposure of coatings to artificial weathering Exposure to fluorescent UV lamps and water (ISO 11507:2007) EN ISO 11890-1, Paints and varnishes Determination of volatile organic compound (VOC) content Part 1
31、: Difference method (ISO 11890-1:2007) ISO 3847, Liquid flow measurement in open channels by weirs and flumes End-depth method for estimation of flow in rectangular channels with a free overfall ISO 7724 (all parts), Paints and varnishes Colorimetry 3 Terms and definitions For the purposes of this d
32、ocument gloss finish is defined as 80 units measured at 60 according to EN 3840 test 27. 4 Classification Not applicable. 5 Batch release and qualification testing 5.1 Batch release testing For batch acceptance the tests marked with an * shall be performed. BS EN 4476:2011EN 4476:2011 (E) 7 5.2 Qual
33、ification tests For product qualification, all tests mentioned in this European Standard, in Table 1 to Table 4, shall be performed. Table 1 General requirements Characteristic number Characteristic Requirements 1.001 Material description Single or two component cold curing intermediate coat 1.002 F
34、ormulation Not restricted Thinner if required 1.003 Preparation If more than one component these components shall be mixed in simple whole number proportions, by volume or by mass, in accordance with the manufacturers instructions 1.004 Technical specification See EN 3840 1.007 Visual colour See EN
35、3840 1.008 Freedom from defects See EN ISO 1513 1.009 Application and use Dry film thickness of (15 5) m unless otherwise specified. 1.010 Storage stability See EN 3840 1.011 Shelf life See EN 3840 1.013 Drying conditions EN 23270 for seven days before testing unless otherwise specified. Intermediat
36、e coat is applied to the primer and the finish to the intermediate coat following drying for 4 h to 16 h unless otherwise specified. 1.093 Quality assurance See EN 3840 1.094 Designation Intermediate Coat EN 4476 1.095 Packaging See EN 3840 1.096 Identification marking See EN 3840 1.097 Flash point
37、EN 3840 Test 7 EN ISO 3679 or EN ISO 3680 base activatorfthinnerfC reference valuec reference valuec reference valuec1.098 Health and safety See EN 3840 1.999 Notes f Test only if component is present. c The reference value is that established during qualification. BS EN 4476:2011EN 4476:2011 (E) 8
38、Table 2 Physical and chemical characteristics Characteristic number Characteristic Requirements 2.008 Condition 1 EN ISO 1513 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 ap
39、plication to produce a defect free film 1 None 3 EN 3837 A22024-T3 clad4 EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435 Primer + Intermediate coat to this European Standard * 7 Liquid paint shall result in an opaque even finish, free from runs, sags, wrinkling, pinholing or other
40、 defect 2.113 Sedimentation rating EN 3840 1 Test 5 ISO 3847 6 base + activatorf+ thinnerf7 ml V = 30 after 4 h 2.106 Reactivity Pot life EN 3840 1 Test 20 EN ISO 9514 followed by Test 8aEN ISO 2431 or Test 9aEN ISO 2884-1 6 base + activatorf+ thinnerf* 7 s or Pa s 2 initial value after 4 h 2.107 Vi
41、scosity EN 3840 1 Test 8 EN ISO 2431aor Test 9 EN ISO 2884-1a6 base + activatorf+ thinnerf7 s or Pa s 10 %b, c2.104 Composition Non volatile matter EN 3840 1 Test 1 EN ISO 3251 7 base Activatorf % 2b, c 2b, c2.104 Composition Volatile organic compound (VOC) content EN 3840 1 Test 49 EN ISO 11890-1 6
42、 base + activator f+ thinner f7 g/l reference value b c2.301 Density EN 3840 7 base activatorfthinnerf1 Test 3eEN ISO 2811 Test 4 EN ISO 3675 Test 4 EN ISO 3675 * 7 of ref. value 2b, c 2b, c 2b, c(continued)BS EN 4476:2011EN 4476:2011 (E) 9 Table 2 (continued) Characteristic number Characteristic Re
43、quirements 2.106 Reactivity surface dry through-dry EN 3840 1 Test 21 EN ISO 9117-3 Test 23 EN ISO 9117-1Mass = 1 500 g 3 EN 3837 A22024-T3 clad4 EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435 primer + Intermediate coat to this European Standard 6 EN 23270 7 h 1d 6d2.111 Optical
44、properties colour EN 3840 1 Test 30 ISO 7724 3 EN 3837 A22024-T3 clad4 EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-002 primer + Intermediate coat to this European Standard 6 EN 23270 * 7 E shall match the colour specified 2.111 Optical properties gloss 60 EN 3840 1 Test 27 EN
45、ISO 2813 3 EN 3837 A22024-T3 clad4 EN 3837 Process A or B or C EN 2334 Pickle or CAA or CCC 5 EN 2435-002 primer + Intermediate coat to this European Standard + Finish EN 2434-004 6 EN 23270 * 7 Gloss units shall match the gloss specified 2.999 Notes a Test 8 shall be used for non-thixotropic paints
46、 and test 9 for thixotropic paints. b The deviation is that compared to the reference value. c The reference value is that established during qualification. d Unless otherwise specified. e Test could also be used for activator and thinner if required. f Test only if component is present. BS EN 4476:
47、2011EN 4476:2011 (E) 10 Table 3 Mechanical characteristics Characteristic number Characteristic Requirements 3.304 Adhesion EN 3840 1 Test 24 EN ISO 2409 3 EN 3837 A22024-T3 clad4 EN 3837 Process A EN 2334 Pickle 5 EN 2435-002 Primer + Intermediate coat to this European Standard + Finish EN 2434-004
48、 6 EN 23270 7 Classification 1 3.304 Scratch resistance EN 3840 1 Test 29 EN ISO 1518 3 EN 3837 A22024-T3 clad4 EN 3837 Process A or B or C aEN 2334 Pickle or CAA Rules for the drafting and presentation of material standards Part 9: Paints and varnishes This page deliberately left blankBSI is the in
49、dependent national body responsible for preparing British Standardsand other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.British Standards Institution (BSI)raising standards worldwideBSI Group Headquarters389 Chiswick High Road London W
