1、ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1996 07 22 Revised Revised para 3.3.2 E. Nunez1984 08 15 3.2.4 Revised CV01-DR5259991983 05 07 Released CVN1-WR905627-1WP 3948-a Page 1 of 10 ENAMEL, MODIFIED POLYESTER BASECOAT FOR ESB-M32J120-A1BASECOAT/CLEARCOA
2、T WET ON WET PROCESS -EXTERIOR QUALITYENAMEL, THERMOSET ACRYLIC CLEARCOAT FOR ESB-M32J120-A2BASECOAT/CLEARCOAT WET ON WET PROCESS -EXTERIOR QUALITY1. SCOPEThe materials defined by these specifications consist of a pigmented,modified polyester basecoat enamel over which is applied a clear thermo-sett
3、ing acrylic topcoat in a wet on wet process and concurrently monobaked.2. APPLICATIONThese specifications were released originally for materials used as thetopcoat finish on automobile bodies, hoods, fenders and other exteriorparts, and shall be satisfactory for use over specified primers, or overpr
4、eviously baked enamel, as in paint repair or two-toning operations.3. REQUIREMENTS3.1 COMPOSITION3.1.1 ESB-M32J120-A1, BasecoatResin Solids: Cellulose acetate butyrate modified polyestersystem which is durable, provides good adhesion to primersand is compatible with the clearcoat.Pigments: Pigments
5、are exterior quality automotive grade, andthe pigment blend shall provide a satisfactory color match tothe Ford master panel on file.3.1.2 ESB-M32J120-A2, ClearcoatResin Solids: Thermosetting melamine modified acrylic resinwith only minor amounts of resinous modifiers.Ultraviolet Light Absorber(s):
6、Clearcoat shall contain UVabsorber(s) in sufficient amount to provide long-termdurability to the enamel.3.1.3 Specific CompositionSupplier will furnish such data upon request.NOT TO BE USED FOR NEW DESIGNS2012 05 04 N Status No usage or replacement N. Benipal, NAENGINEERING MATERIAL SPECIFICATIONESB
7、-M32J120-A1ESB-M32J120-A2WP 3948-b Page 2 of 10 3.1.4 VolatileThe proportions 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 obtain
8、edwithout sagging and with satisfactory freedom from roughnessor dry spray. The volatile portion shall contain sufficientactive solvents to give satisfactory adhesion when the enamelis applied over a previously baked coat of the enamels.3.1.5 ToxicityShall contain no benzol (benzene), chlorinated or
9、 other toxiccompounds, or hydrolyzable chlorine derivatives or have anobnoxious or objectionable odor.3.2 PHYSICAL PROPERTIES3.2.1 Non-Volatile Solids(FLTM BI 2-1)3.2.1.1 Pigmented Basecoat ESB-M32J120-A1Minimum solids content of 16 % required at 26 to 30s on #4 Ford Cup at 26 +/- 1 C.3.2.1.2 Clearc
10、oat ESB-M32J120-A2Minimum solids content of 41 % required at 29 to 33s on #4 Ford Cup at 26 +/- 1 C.3.2.2 Viscosity(FLTM BI 11-1)3.2.2.1 Pigmented Basecoat ESB-M32J120-A128 +/- 2 s on #4 Ford Cup at 26 +/- 1 C.3.2.2.2 Clearcoat ESB-M32J120-A231 +/- 2 s on #4 Ford Cup at 26 +/- 1 C.3.2.3 Viscosity St
11、ability3.2.3.1 Pigmented Basecoat ESB-M32J120-A1Shall not jell or liver after standing for 90 daysat room temperature of 26 +/- 1 C. Material must befree of settling which cannot be dispersed bynormal agitation. Viscosity increase of more than15 s on #4 Ford Cup is not permitted.ENGINEERING MATERIAL
12、 SPECIFICATIONESB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 3 of 10 3.2.3.2 Clearcoat ESB-M32J120-A2Shall not jell or become turbid after standing for90 days at room temperature of 26 +/- 1 C.Viscosity increase of more than 12 s on #4 Ford Cupis not permitted.3.2.4 Dry Hiding(FLTM BI 1-4)Pigmented Base
13、coat ESB-M32J120-A1There shall be complete visual hiding over black and graycheckerboard at a maximum film thickness of 15 micrometre.3.3 PREPARATION OF TEST PANELS3.3.1 SubstrateParker Bonderite 40 unpolished 100 mm x 300 mm cold rolledsteel panels.3.3.2 Electrocoat PrimerPanels to be primed with c
14、urrent production medium build GrayCationic Electrocoat primer to minimum dry film thickness of20 - 25 micrometre. Bake schedule is 10 minutes at 180 Cmetal temperature.3.3.3 Spray PrimerUsing electrocoat primed panels, apply current productionPrimer - Surfacer by spray to a minimum dry film thickne
15、ss of18 micrometre. Bake primer 20 minutes at 163 C metaltemperature for adhesion tests per para 3.5.3 and 20 minutesat 149 C (8 minutes minimum at 135 C metal temperature) forall other tests.3.3.4 EnamelReduce basecoat ESB-M32J120-A1 to spray viscosity asspecified by supplier and apply to a dry fil
16、m thickness of 15- 20 micrometres. Flash 2 minutes. Reduce clearcoatESB-M32J120-A2 to spray viscosity as recommended by supplierand apply to a dry film thickness of 40 - 50 micrometres.Bake per para 3.3.6 standard bake.3.3.5 Catalyzed RepairBasecoat ESB-M32J120-A1: Catalyst is not required.Clearcoat
17、 ESB-M32J120-A2: Add 5 % by volume of Acid Catalystas specified by the supplier of the enamel.ENGINEERING MATERIAL SPECIFICATIONESB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 4 of 10 Prepare panels per para 3.3.1 through 3.3.4. Mask right halfof panels vertically and wipe left half clean with M14J503nap
18、htha. Apply basecoat ESB-M32J120-A1 and catalyzed clear-coat ESB-M32J120-A2 as described in Section 3.3. Remove tape,flash-off panels and bake for 20 minutes at 99 C (ambienttemp.) with a minimum of 10 minutes at 99 C metaltemperature.3.3.6 Baking Schedules. Standard bake is 17 minutes at 130 C ambi
19、ent. A minimum of10 minutes at 130 C metal temperature is required. Maximum bake is 20 minutes at 143 C metal temperature. Catalyzing bake is 20 minutes at 99 C ambient. A minimumof 10 minutes at 99 C metal temperature is required.The standard bake shall apply to all tests except thefollowing:. Para
20、 3.4.1 Color. Para 3.4.3 Gloss after rebake. Para 3.6.3 Intercoat adhesion3.4 APPEARANCE3.4.1 Color(FLTM BI 9-1)Shall match the Ford Motor Company master panel after all ofthe baking cycles described in para 3.3.6.3.4.2 Gloss, All Colors, min 90(FLTM BI 10-1, 20 deg Glossmeter)3.4.3 Gloss After Reba
21、ke(20 deg Glossmeter)No more than 4 units decrease in gloss is permitted whenpanel is rebaked per para 3.3.6.3.4.4 Distinctness of Image, min 65(FLTM BI 10-3)3.4.5 GeneralThe enamel shall bake out to a presentable, serviceable filmshowing no craters, pinholing, seediness, abnormal roughnessor excess
22、ive metallic mottling. It shall have a reasonabletolerance for ordinary cleaning, and exhibit excellentpolishing characteristics when wheel polished with a widerange of various compounds and cleaners.ENGINEERING MATERIAL SPECIFICATIONESB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 5 of 10 3.5 FILM PROPER
23、TIES3.5.1 Film Thickness RequirementsBasecoat, ESB-M32J120-A1 15 - 20 micrometreClearcoat, ESB-M32J120-A2 40 - 50 micrometre3.5.2 Hardness, min (Clearcoat ESB-M32J120-A2)(FLTM BI 12-1 and BI 12-2)Tukon 7.5 K.H.N.Sward (alternate) 36Bake panels per standard schedule in para 3.3.6.Hardness and polishi
24、ng characteristics shall be such thatairborne dirt dried in the film, dry spray areas, or othersurface defects can be removed by sanding and polishing.After sanding with #600 grit paper lubricated with mineralspirits, and then wheel polished with a medium grit compound,there shall be no noticeable c
25、hange in sheen between thepolished and unpolished areas.3.5.3 Adhesion3.5.3.1 Scratch Test(FLTM BI 6-1, Part A)No chipping or loss of adhesion of the clearcoatfrom the basecoat is permitted.Scribe Test(FLTM BI 6-1, Part B)Occurrence of flaking, chipping or peeling shallnot exceed Fig 2 of Test Metho
26、d.NOTE: No delamination, peeling or loss of adhesionof the clearcoat from the basecoat is permitted.3.5.3.2 Chip Resistance(SAE J 400)Chipping shall not exceed Fig 4B. No delaminationof clearcoat from basecoat is permitted.3.5.4 Bleeding Not permitted(FLTM BI 14-1)ENGINEERING MATERIAL SPECIFICATIONE
27、SB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 6 of 10 3.5.5 PolishingShall be capable of being sanded and polished, or polishedonly, to minimize orange peel or to remove defects. Nonoticeable change in gloss or appearance except for a minimumof polishing lines is permitted. Deep polishing lines orswirl
28、marks are not acceptable.3.6 REPAIR REQUIREMENTS3.6.1 Repair Color Match(FLTM BI 15-1)Conduct test as described in Method, except that the repairbake will be the maximum bake defined in para 3.3.6. Thereshall be a satisfactory color match of the repair film toboth the rebaked original coating and to
29、 the panel preparedusing only one standard bake.3.6.2 Repair, Catalyzed Chipping, flaking or loss of (FLTM BI 6-1, Part B) adhesion shall not exceed Fig 2 ofTest Method. No delamination ofclearcoat from basecoat ispermitted.Prepare panels per para 3.3.5. The catalyzed repair filmshall show a satisfa
30、ctory color match to the standard bakefilm.3.6.2.1 Hardness, min (Clearcoat ESB-M32J120-A2)(FLTM BI 12-1 and BI 12-2)Tukon 4 - 5 K.H.N.Sward (Alternate) 203.6.3 Intercoat Adhesion No chipping, flaking, loss of(FLTM BI 6-1, Part A) adhesion or delamination ofclearcoat is allowed.(FLTM BI 6-1, Part B)
31、 Chipping, flaking, or loss ofadhesion shall not exceed Fig 2 ofTest Method. No delamination ofclearcoat from basecoat ispermitted.Prepare 4 panels using ESB-M32J120-A1/A2 as described in para3.3.1 through 3.3.4 with the provision that 2 panels arebaked per the standard bake of para 3.3.6 and the re
32、maining2 panels are bake per the maximum bake of para 3.3.6. Coolpanels to room temperature after removal from oven. Care mustbe taken to avoid touching the panel test surface with thehands. Do not wipe.ENGINEERING MATERIAL SPECIFICATIONESB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 7 of 10 Recoat 1 pan
33、el each of the standard bake and maximum bakepanels with current production quality white enamel and bakeusing standard bake per para 3.3.6. Recoat 1 panel each ofthe standard bake and maximum bake panels with theESB-M32J120-A1/A2 previously used to prepare same. Bakepanels using the standard bake o
34、f para 3.3.6.After all panels have been cooled to room temperature performtesting as described in Test Method.3.6.4 Flash Primer Repair(Per ESB-M6J111-C)Material shall perform over Flash Primer as defined inESB-M6J111-C.3.7 RESISTANCE PROPERTIESNOTE: The following requirements apply to both the stan
35、dard bakefilm and catalyzed repair film.3.7.1 Salt Spray 240 h(FLTM BI 3-1)There shall be no blistering or delamination of the clearcoatfrom the basecoat. Rust creepage or loss of adhesion of morethan 3 mm from line scribed to bare metal is not permitted.3.7.2 Water Immersion 240 h(FLTM BI 4-1)No bl
36、istering, peeling, dulling or delamination of theclearcoat from the basecoat is allowed.3.7.3 Water and Soap Spotting No spotting is permitted(FLTM BI 13-1)3.7.4 Acid Spotting No spotting or discoloration is(FLTM BI 13-5) permitted3.7.5 Resistance to XyleneAge enamel for 72 h prior to testing. Using
37、 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 arepermitted.ENGINEERING MATERIAL SPECIFICATIONESB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 8 of 10 3.7.6 Cold Checking Resistan
38、ce(FLTM BI 7-2, a single coat shall bedefined as the basecoat and clearcoattogether)The material shall withstand a minimum of 10 cold test cycleswithout cracking or noticeable dulling.3.7.7 Weathering ResistanceTwo types of panels will be evaluated for Florida durabilityand for accelerated weatherin
39、g durability. They are asfollows:. Standard Bake Panels - These are prepared per para 3.3.1through 3.3.4. Catalyzed Repair Panels - These panels are prepared perpara 3.3.5.3.7.7.1 Florida Exposure 60 Mos. standard rack(Miami area, utilizing both standard non-insulatedracks and Black Box type racks,
40、facing South at anangle of 5 deg from the horizontal)Scribe a vertical 25 mm line at lower left cornerof panels. Panels are to be exposed for 12, 24, 36,48, and 60 months respectively, using both standardbake panels and catalyzed repair panels. Duplicatesets of panels will be exposed concurrently in
41、Black Box mode. A total of 10 standard bake panelsand 10 catalyzed repair panels are required tocomply with these requirements.Exposed panels shall be washed per FLTM BI 3-5. Thepanels will next be placed in a deionized waterbath for 16 h per FLTM BI 4-1. After panels areremoved from test and blown
42、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 show no more evidence of chalking,dulling, fading or other color ch
43、ange than thestandard master sample on file in the BEPEMaterials Engineering Department. Also, the panelsshall be free from cracking and microchecking whenexamined with the aid of a light source such as aBerkey colortran Multi-10A Lamp, Model 100-301using a Sylvania 120V FBY bulb. Any evidence ofsuc
44、h cracking or microchecking is considered to bea failure.ENGINEERING MATERIAL SPECIFICATIONESB-M32J120-A1ESB-M32J120-A2WP 3948-b Page 9 of 10 NOTE: The performance rating assigned to acompleted 60 Mos. Florida exposure panel takesprecedence over a panel of the same materialexposed for 2500 h in acce
45、lerated weathering tests(Q-Panel QUV or equivalent).3.7.7.2 Accelerated Exposure 2500 h(ASTM G 53, Q-Panel QUV orequivalent, with a cycle of 4 hUV exposure at 60 C and 4 hcondensing humidity at 50 C)Scribe a vertical 25 mm line at lower left cornerof panel. Panels are to be exposed for 1000 h,2000 h
46、 and 3000 h respectively, using both standardbake and catalyzed repair panels.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 described above for Florida pa
47、nels.Especially critical is the examination of panelsfor cracking and microchecking since theseconstitute a serious failure mode.3.8 PERFORMANCE WITH COMPONENT ITEMSMaterial shall be compatible with all pertinent sealers, adhesives,bodyside molding tapes, vinyl films and pin stripes or any othersimi
48、lar tape of item.3.9 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 m
49、aterialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval 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 materials addressed by this document. The restrictions aredefined in Engineering Mater
