1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990-08-01 EP00E01031538000 Released KW conc. J.SchultWP 3948-a Page 1 of 4 PAINT, CLEARCOAT, TWO PACK, PLASTIC SUBSTRATES, WSK-M16J11-AEXTERIOR1. SCOPEThe material defined by this specification is an exterior cl
2、earcoat forplastic parts. It must be cured with a suitable isocyanate hardener.2. APPLICATIONThis spe cification was released originally for material used as two packclearcoat over metallic basecoa t for various exterior applications such asradiator grilles, body side moldings, etc.3. REQUIREMENTS3.
3、1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mutually acceptable Control Plan as describedth erein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the
4、 final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst it
5、ute the reference standard and shall be kept on file at thedesignated material lab oratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONINGAl l Tests according to this specification shall be performed
6、 in acontrolled atmosphere of 23 +/- 2 C and 50 - 65 % relative humidityif not otherwise specified.3.4 COMPOSITION3.4.1 ResinSynthetic polyhydroxy acrylic resins.ENGINEERING MATERIAL SPECIFICATIONWSK-M16J11-AWP 3948-b Page 2 of 4 3.4.2 UV - StabilizerThe clearcoat shall con tain a combination of UV-
7、Absorber andLight Stabilizer (e.g. steric hindered amines).3.4.3 Solvent Emissions see Initial Sample +/- 1 %(ASTM D 3960)This r equirement is as determined by the United StatesEnvironmental Protection Agency Reference Method #24 and isonly applicable to materials used in the USA.3.5 MATERIAL PROPER
8、TIES3.5.1 Non-volatile see Initial Sample +/- 1 %;(FLTM BI 102-01) min 40 %The n on-volatile content shall be determined at a sprayviscosity of 20 s according to para 3.5.4.3.5.2 Density see Initial Sample +/- 0.02 g/mL(ASTM D 1475)3.5.3 Viscosity as supplied see Initial Sample +/- 2 s(FLTM BI 111-0
9、1)3.5.4 Spray Viscosity as specified by the supplier(FLTM BI 111-01, FC #4)The material can be reduced with Xylene (WSK-M14J239-A) andButyl acetate (WSK-M14J228-B).3.5.5 Mixing ratio as specified by the supplierThe material shall be cured with isocyanate hardenerWSK-M99J359-A or WSK-M99J360-A.3.5.6
10、Storage Stability 90 daysDuri ng a storage of 90 days between 5 and 32 C temperaturethe m aterial as supplied shall not settle up or cakeinsol uble. After the storage the material must pass allspecification requirements.3.6 PREPARATION OF TEST PANELS3.6.1 SubstrateABS, Polyamide, Polycarbonate or Po
11、lypropylene, etc. asrequired on Engineering Drawing.Note: PP/EPDM plastics must be primed with an ad hesion primerprior to painting.ENGINEERING MATERIAL SPECIFICATIONWSK-M16J11-AWP 3948-b Page 3 of 4 3.6.2 Plastic PreparationThe surface to be painted shall be cleaned by an acceptablepr ocess, e.g. p
12、ower wash, to remove mold releasing agents,fingerprints, oils, dirt and moisture.3.6.3 Primer Surfacer (if required)Application of a primer surfacer, film thickness and bakingas specified in the relevant material specification.3.6.4 BasecoatApplication of current production basecoatDry film thicknes
13、s as required in material specificationFlash off time: 5 minutes3.6.5 ClearcoatWet on wet application of two pack high flexible clearcoatDry film thickness: 35 - 40 micrometreFlash off time: 5 minutes at room temperatureBaking (Object temperature) in combination with:solvent based basecoats: 2 0 min
14、utes at 80 Cwater based basecoats: 2 5 minutes at 90 C3.6.6 AgeingTest panels prepared under this specification shall be agedfor at least 72 h at 23 +/- 2 C or 16 h at 45 +/- 1 C beforetesting for resistance properties.3.7 APPEARANCECol our, gloss, grain and surface finish shall match master TrimSam
15、ple and/or Master Appearance Sample as approved by Design.3.7.1 Colour Colourless(FLTM BI 109-01)3.7.2 Gloss 85 %(FLTM BI 110-01, 60 deg)3.8 PENCIL HARDNESS, min H(FLTM BI 151-01)3.9 RESISTANCE PROPERTIESTest Panels and plastic parts painted according to para 3.6 of thisspecification shall meet all
16、requirements of performancespecification WSK-M2P143-A.ENGINEERING MATERIAL SPECIFICATIONWSK-M16J11-AWP 3948-b Page 4 of 4 3.10 QUALITYThe clearcoat must be adaptable for application in accordance withthe appropriate Ford Motor Company Process Specification.The clearcoat must be compatible with all r
17、elated materials.3.12 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any changes in the properties, composition,co nstruction, color, processing or labelling of
18、the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written ap
19、proval of the Materials Engineeringactivity. Test data, test samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford apply tothe mat erials addressed by this document. The restrictions aredefined in Engineering Material Spe
20、cification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval
21、ofthe ir materials shall first obtain an expression of interest from theaffect ed Purchasing, Design and Materials Engineering activity. Uponrequest, the supplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal valu
22、es), the material designation and code number, and testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List. 5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 DENSITY OF THE DRY FILM see Initial Sample +/- 0.02 kg/L(FLTM BI 154-02)
