1、ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1986 05 19 C3Q1-PF906800-1 ReleasedWP 3948-a Page 1 of 10 ENAMEL INTERMEDIATE V.O.C., MODIFIED POLYESTER ESB-M32J121-A1BASECOAT FOR BASECOAT/CLEARCOAT WET ON WETPROCESS - EXTERIOR QUALITYENAMEL INTER
2、MEDIATE V.O.C., THERMOSET ACRYLIC ESB-M32J121-A2CLEARCOAT FOR BASECOAT/CLEARCOAT WET ON WETPROCESS - EXTERIOR QUALITY1. SCOPEThe materials defined by these specifications are coatings with anintermediate V.O.C. level and consist of a pigmented, modified polyesterbasecoat enamel over which is applied
3、 a clear thermosetting acrylic topcoatin a wet on wet process and concurrently monobaked.2. APPLICATIONThese specifications were released originally for materials with anintermediate V.O.C. level and used as the topcoat finish on automobilebodies, hoods, fenders and other exterior parts, and shall b
4、e satisfactoryfor use over specified primers, or over previously baked enamel, as inpaint repair or two-toning operations.3. REQUIREMENTSNote: The following requirements apply to the complete basecoat/clearcoatsystem. The separate components are not meant to be used singly.3.1 STATISTICAL PROCESSSup
5、pliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatistical tools must be used to analyze process/product data sothat variation in the final product is continuous
6、ly reduced.3.2 COMPOSITION3.2.1 ESB-M32J121-A1, BasecoatResin Solids: Cellulose acetate butyrate modified polyestersystem which is durable, provides good adhesion to primersand is compatible with the clearcoat.Pigments: Pigments are exterior quality automotive grade, andthe pigment blend shall provi
7、de a satisfactory color match tothe Ford master panel on file.NOT TO BE USED FOR NEW DESIGN2012 05 04 N Status No usage or replacement N. Benipal, NAENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 2 of 10 3.2.2 ESB-M32J121-A2, ClearcoatResin Solids: Thermosetting melamin
8、e modified acrylic resinwith only minor amounts of resinous modifiers.Ultraviolet Light Absorber(s): Clearcoat shall contain UVabsorber(s) in sufficient amount to provide long-termdurability to the enamel.3.2.3 Specific CompositionSupplier will furnish such data upon request.3.2.4 VolatileThe propor
9、tions of solvents in the volatile portion shall beso arranged that the enamel will level out satisfactorily onspray application. The volatility of the solvents are to beso chosen that the specified film thicknesses can be obtainedwithout sagging and with satisfactory freedom from roughnessor dry spr
10、ay. The volatile portion shall contain sufficientactive solvents to give satisfactory adhesion when the enamelis applied over a previously baked coat of the enamels.3.3 PHYSICAL PROPERTIES3.3.1 Non-Volatile Solids(FLTM BI 2-1)3.3.1.1 Pigmented Basecoat ESB-M32J121-A1Minimum volume solids content of
11、17 % required atspray viscosity(15“ on #4 Ford Cup at 26 +/- 1 EC).3.3.1.2 Clearcoat ESB-M32J121-A2Minimum volume solids content of 37 % required atspray viscosity(15“ on #4 Ford Cup at 26 +/- 1 EC).3.3.2 Viscosity - Package(FLTM BI 11-1)3.3.2.1 Pigmented Basecoat ESB-M32J121-A128 + 2 s on #4 Ford C
12、up at 26 +/- 1 EC.3.3.2.2 Clearcoat ESB-M32J121-A231 +/- 2 s on #4 Ford Cup at 26 +/- 1 EC.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 3 of 10 3.3.3 Viscosity Stability3.3.3.1 Pigmented Basecoat ESB-M32J121-A1Shall not jell or liver after standing for 90 daysat room
13、temperature of 26 +/- 1 EC. Material mustbe free of settling which cannot be dispersed bynormal agitation. Viscosity increase of more than15 s on #4 Ford Cup is not permitted.3.3.3.2 Clearcoat ESB-M32J121-A2Shall not jell or become turbid after standing for90 days at room temperature of 26 +/- 1 EC.
14、Viscosity increase of more than 12 s on #4 Ford Cupis not permitted.3.3.4 Dry Hiding(FLTM BI 1-4)Pigmented Basecoat ESB-M32J121-A1There shall be complete visual hiding over black and graycheckerboard at a maximum film thickness of 15 Fm3.4 PREPARATION OF TEST PANELS3.4.1 SubstrateParker Bonderite 40
15、 unpolished 100 mm x 300 mm cold rolledsteel panels.3.4.2 Electrocoat PrimerPanels to be primed with ESB-M64J19 or current productionBlack or Gray Cationic Electrocoat primer to minimum dry filmthickness of 13 micrometres. Bake schedule is 10 minutes at180 EC metal temperature.3.4.3 Spray PrimerUsin
16、g panels electrocoat primed per para 3.4.2, apply currentproduction Taupe Primer - Surfacer by spray to a minimum dryfilm thickness of 18 micrometres. Bake primer 20 minutes at163 C metal temperature for adhesion tests per para 3.6.3 and20 minutes at 149 EC (8 minutes minimum at 135 EC metaltemperat
17、ure) for all other tests.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 4 of 10 3.4.4 EnamelReduce basecoat ESB-M32J121-A1 to spray viscosity asspecified by the supplier and apply to a dry film thicknessof 15 - 20 micrometres. Flash 2 minutes. Reduce clearcoatESB-M32J12
18、1-A2 to spray viscosity as recommended by supplierand apply to a dry film thickness of 40 - 50 micrometres.Bake per para 3.4.6 standard bake.3.4.5 Catalyzed RepairBasecoat ESB-M32J121-A1: Catalyst is not required.Clearcoat ESB-M32J121-A2: Add 5 % by volume of Acid Catalystas specified by the supplie
19、r to the reduced clear enamel.Prepare panels per para 3.4.1 through 3.4.4. Mask right halfof panels vertically and wipe left half clean with M14J503naphtha. Apply basecoat ESB-M32J121-A1 and catalyzed clear-coat ESB-M32J121-A2 as described in Section 3.3. Remove tape,flash-off panels and bake for 20
20、 minutes at 99 EC (ambienttemp.) with a minimum of 10 minutes at 99 EC metaltemperature.3.4.6 Baking Schedules. Standard bake is 17 minutes at 130 EC ambient. A minimumof 10 minutes at 130 EC metal temperature is required. Maximum bake is 20 minutes at 143 EC metal temperature. Catalyzing bake is 20
21、 minutes at 99 EC ambient. A minimumof 10 minutes at 99 EC metal temperature is required.The standard bake shall apply to all tests except thefollowing:. Para 3.5.1 Color. Para 3.5.3 Gloss after rebake. Para 3.7.3 Intercoat adhesion3.5 APPEARANCE3.5.1 Color(FLTM BI 9-1)Shall match the Ford Motor Com
22、pany master panel after all ofthe baking cycles described in para 3.4.6.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 5 of 10 3.5.2 Gloss, All Colors, min 90(FLTM BI 110-1, 20 Glossmeter)3.5.3 Gloss After Rebake(20 deg Glossmeter)No more than 4 units decrease in gloss
23、is permitted whenpanel is rebaked per para 3.4.6.3.5.4 Distinctness of Image, min 65(FLTM BI 10-3)3.5.5 GeneralThe enamel shall bake out to a presentable, serviceable filmshowing no craters, pinholing, seediness, abnormal roughnessor excessive metallic mottling. It shall have a reasonabletolerance f
24、or ordinary cleaning, and exhibit excellentpolishing characteristics when wheel polished with a widerange of various compounds and cleaners.3.6 FILM PROPERTIES3.6.1 Film Thickness RequirementsBasecoat, ESB-M32J121-A1 15 - 20 FmClearcoat, ESB-M32J121-A2 40 - 50 Fm3.6.2 Hardness, min (Clearcoat ESB-M3
25、2J121-A2)(FLTM BI 12-1 and BI 12-2)Tukon 7.5 K.H.N.Sward (alternate) 36Bake panels per standard schedule in para 3.4.6.Hardness and polishing characteristics shall be such thatairborne dirt dried in the film, dry spray areas, or othersurface defects can be removed by sanding and polishing.After sand
26、ing with #600 grit paper lubricated with mineralspirits, and then wheel polished with a medium grit compound,there shall be no noticeable change in sheen between thepolished and unpolished areas.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 6 of 10 3.6.3 Adhesion3.6.3.
27、1 Scratch Test(FLTM BI 106-1, Part A)No chipping or loss of adhesion of the clearcoatfrom the basecoat is permitted.Scribe Test(FLTM BI 106-1, Part B)Occurrence of flaking, chipping or peeling shallnot exceed Fig 2 of Test Method.NOTE: No delamination, peeling or loss of adhesionof the clearcoat fro
28、m the basecoat is permitted.3.6.3.2 Chip Resistance(SAE J400)Chipping shall not exceed Fig 4B. No delaminationof clearcoat from basecoat is permitted.3.6.4 Bleeding Not permitted(FLTM BI 114-1)3.6.5 PolishingShall be capable of being sanded and polished, or polishedonly, to minimize orange peel or t
29、o remove defects. Nonoticeable change in gloss or appearance except for a minimumof polishing lines is permitted. Deep polishing lines orswirl marks are not acceptable.3.7 REPAIR REQUIREMENTS3.7.1 Repair Color Match(FLTM BI 15-1)Conduct test as described in Method, except that the repairbake will be
30、 the maximum bake defined in para 3.4.6. Thereshall be a satisfactory color match of the repair film toboth the rebaked original coating and to the panel preparedusing only one standard bake.3.7.2 Repair, Catalyzed Chipping, flaking or loss of(FLTM BI 106-1, Part B) adhesion shall not exceed Fig 2 o
31、fTest Method. No delamination ofclearcoat from basecoat is permittedENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 7 of 10 Prepare panels per para 3.4.5. The catalyzed repair filmshall show a satisfactory color match to the standard bakefilm.3.7.2.1 Hardness, min (Clear
32、coat ESB-M32J121-A2)(FLTM BI 12-1 and BI 12-2)Tukon 4 - 5 K.H.N.Sward (Alternate) 203.7.3 Intercoat Adhesion No chipping, flaking, loss of(FLTM BI 106-1, Part A) adhesion or delamination ofclearcoat is allowed(FLTM BI 106-1, Part B) Chipping, flaking, or loss ofadhesion shall not exceed Fig 2 ofTest
33、 Method. No delamination ofclearcoat from basecoat is permittedPrepare 4 panels using ESB-M32J121-A1/A2 as described in para3.4.1 through 3.4.4 with the provision that 2 panels arebaked per the standard bake of para 3.4.6 and the remaining2 panels are bake per the maximum bake of para 3.4.6. Coolpan
34、els to room temperature after removal from oven. Care mustbe taken to avoid touching the panel test surface with thehands. Do not wipe.Recoat 1 panel each of the standard bake and maximum bakepanels with current production quality white enamel and bakeusing standard bake per para 3.4.6. Recoat 1 pan
35、el each ofthe standard bake and maximum bake panels with theESB-M32J121-A1/A2 previously used to prepare same. Bakepanels using the standard bake of para 3.4.6.After all panels have been cooled to room temperature performtesting as described in Test Method.3.7.4 Flash Primer Repair(Per ESB-M6J111-C)
36、Material shall perform over Flash Primer as defined inESB-M6J111-C.3.8 RESISTANCE PROPERTIESNOTE: The following requirements apply to both the standard bakefilm and catalyzed repair film.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 8 of 10 3.8.1 Water Immersion 240 h(
37、FLTM BI 4-1)No blistering, peeling, dulling or delamination of theclearcoat from the basecoat is allowed.3.8.2 Water and Soap Spotting No spotting is permitted(FLTM BI 13-1)3.8.3 Acid Spotting No spotting or discoloration is(FLTM BI 13-5) permitted3.8.4 Resistance to XyleneAge enamel for 72 h prior
38、to testing. Using a circularmotion, rub the surface of the enamel 10 times with a smallwad of cheesecloth which has been wetted with xylene. Nodulling, softening or other undesirable effects are permittedafter a 20 minute recovery period.3.8.5 Cold Checking Resistance(FLTM BI 7-2, a single coat shal
39、l bedefined as the basecoat and clearcoattogether)The material shall withstand a minimum of 10 cold test cycleswithout cracking or noticeable dulling.3.8.6 Weathering ResistanceTwo types of panels will be evaluated for Florida durabilityand for accelerated weathering durability. They are asfollows:.
40、 Standard Bake Panels - These are prepared per para 3.4.1through 3.4.4. Catalyzed Repair Panels - These panels are prepared perpara 3.4.5.3.8.6.1 Florida Exposure 60 mos. standard rack(Miami area, utilizing both standard non-insulatedracks facing South at an angle of 5 deg from thehorizontal)Scribe
41、a vertical 25 mm line through the enamelonly at lower left corner of panels. Panels are tobe exposed for 12, 24, 36, 48, and 60 monthsrespectively, using both standard bake panels andcatalyzed repair panels. A total of 5 standard bakepanels and catalyzed repair panels are required tocomply with thes
42、e requirements, i.e., 5 panels theright half standard baked enamel and the left halfcatalyzed repair enamel.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 9 of 10 Exposed panels shall be washed per FLTM BI 3-5.The panels will next be placed in a deionized waterbath for
43、16 h per FLTM BI 4-1. After panels areremoved from test and blown dry, tape the scribeline with 3M 898-2 tape and check for delaminationof clearcoat from basecoat. There shall be noblistering, delamination of the clearcoat from thebasecoat or peeling of the basecoat from theprimer.The panels shall s
44、how no more evidence of chalking,dulling, fading or other color change than thestandard master sample on file in the MaterialsEngineering Department. Also, the panels shall befree from cracking and microchecking when examinedwith the aid of a light source such as a Berkeycolortran Multi-10A Lamp, Mo
45、del 100-301 using aSylvania 120V FBY bulb. Any evidence of suchcracking or microchecking is considered to be afailure.NOTE: The performance rating assigned to acompleted 60 Mos. Florida exposure panel takesprecedence over a panel of the same materialexposed for 2500 h in accelerated weathering tests
46、(Q-Panel QUV with FS-40 bulbs or equivalent).3.8.6.2 Accelerated Exposure 2500 h(ASTM G 53, Q-Panel QUV orequivalent, with a cycle of4 h UV exposure at 60 EC and4 h condensing humidity at50 EC)and FS-40 bulbsScribe a vertical 25 mm line through to the primerat lower left corner of panel. Panels are
47、to beexposed for 1000 h, 2000 h and 3000 h respectively,using both standard bake and catalyzed repairpanels.Upon removal from test, tape the scribe line with3M 898-2 tape and check for delamination ofclearcoat from basecoat. The panels shall besubject to the same exposure performancerequirements as
48、described above for Florida panels.Especially critical is the examination of panelsfor cracking and microchecking since theseconstitute serious failure modes.ENGINEERING MATERIAL SPECIFICATIONESB-M32J121-A1ESB-M32J121-A2WP 3948-b Page 10 of 10 3.9 PERFORMANCE WITH COMPONENT ITEMSMaterial shall be co
49、mpatible with all pertinent sealers, adhesives,bodyside molding tapes, vinyl films and pin stripes or any othersimilar type item.3.10 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally granted.Prior to making any change in the properties, composition,construction, color, processing or labelling of the materialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasi
