1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2012 05 04 N Status No usage or replacement N. Benipal, NA 2003 06 26 Revised Para 3.0 inserted; para 3.7 and 4 deleted 1984 03 23 CS01-DR524082 Released Controlled document at www.MATS Copyright 2012, Ford Global Technologies, Inc. Pa
2、ge 1 of 8 ENAMEL, ELASTOMERIC BASECOAT FOR BASECOAT/ ESB-M2J218-A1 CLEARCOAT WET ON WET PROCESS, EXTERIOR HIGH VISIBILITY ENAMEL, ELASTOMERIC CLEARCOAT FOR BASECOAT/ ESB-M2J218-A2 CLEARCOAT WET ON WET PROCESS, EXTERIOR HIGH VISIBILITY NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by t
3、hese specifications are elastomeric enamels, which consist of a base and clear topcoat applied wet on wet and concurrently baked. 2. APPLICATION These specifications were released originally for paints used as the final topcoat on elastomeric substrates, such as fascia, bumper covers and other exter
4、ior parts that cannot be processed with the automotive bodies. 3. REQUIREMENTS Applicable to ESB-M2J218-A1 and ESB-M2J218-A2 unless otherwise indicated. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Pro
5、duction Materials (WSS-M99P1111-A). 3.1 COMPOSITION 3.1.1 Vehicle Solids: Shall be either a polyester, acrylic, modified urethane polymer or a polyurethane. Minor amounts of modifiers and/or plasticizers are allowed. See para 3.1.3 for specific UV absorber requirements. 3.1.2 Pigment (ESB-M2J218-A1)
6、: Shall be balanced and blended so that the finished enamel matches the Ford Motor Company master panel in color and luster and meets the requirements of this specification for durability. 3.1.3 Specific Composition: Both the basecoat and clearcoat shall contain UV absorbers. The supplier will furni
7、sh the specific composition and concentration of the absorbers upon request. ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright 2012, Ford Global Technologies, Inc. Page 2 of 8 3.1.4 Volatile: The proportions of solvents in the volatile portion shall be so arranged that the enamel will le
8、vel out satisfactorily on spray application. The volatility of the solvents are to be so chosen that the specified film thicknesses can be obtained without sagging and with satisfactory freedom from roughness or dry spray. The volatile portion shall contain sufficient active solvents to give satisfa
9、ctory adhesion when the enamel is applied over a previously baked coat of the enamels. 3.1.5 Viscosity: The enamel viscosity value shall be established at C.S.I.R. Tolerance on subsequent batches shall be +/- 6 s #2 Ford Cup or +/- 3 s #4 Ford Cup. 3.2 PHYSICAL PROPERTIES 3.2.1 Solids, min (FLTM BI
10、102-01) 3.2.1.1 Pigmented Basecoat (ESB-M2J218-A1): Minimum solids content for various color classes are shown in para 3.2.3. The values shown apply to either an enamel adjusted to a viscosity of 23 s +/- 3 s #4 Ford Cup at 26 +/- 1 C or with an incoming package that is lower than 20 s #4 Ford Cup.
11、3.2.1.2 Clear Topcoat (ESB-M2J18-A2): 35% min The solids content is to be run on unreduced paint if its viscosity is lower than 26 s #4 Ford Cup at 26 +/- 1 C. If the paints viscosity is higher, adjust the paint viscosity to 26 s #4 Ford Cup at 26 +/- 1 C with a solvent blend agreed to by the manufa
12、cturer and user. 3.2.2 Stability (FLTM BI 102-03) The material shall not liver or jell upon standing and must be free from settling which is not dispersed by normal agitation. The viscosity of the material shall not increase more than 10 s after being adjusted to 18 - 25 s viscosity range as describ
13、ed in para 3.2.1. ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright 2012, Ford Global Technologies, Inc. Page 3 of 8 3.2.3 Pigmented Basecoat (ESB-M2J218-A1) Solids, Hiding: Color % Solids Hiding m Min max 3.2.1.1 3.2.4 Silver Metallic 25 20 High Metallic, at least 20 20 90% of pigment i
14、s aluminum Low Metallic, less than 22 20 90% of pigment is aluminum Other color families to be established 3.2.4 Pigmented Basecoat (ESB-M2J218-A1) Dry Hiding: (FLTM BI 001-04) Complete visual hiding over a red and gray checkerboard at the film thickness specified in para 3.2.3. Since the ESB-M2J218
15、-A1 coating must match the color of the adjacent body panels, the hiding requirement may be waived with a Deviation Request. If so, the ESB-M2J218-A1 coating must be applied to the film thickness required to achieve complete visual hiding. 3.3 PREPARATION OF TEST PANELS Prepare according to the foll
16、owing procedure: 3.3.1 Panels Unless otherwise specified, use 2.54 - 3.81 mm thick elastomeric panels of any convenient size, representative of production material. A smooth surface with no pits or blow holes is required. Solvent wipe panels clean before applying primer. 3.3.2 Primer Apply 21 - 30 m
17、 of the primer specified for the substrate and bake per specification requirements. 3.3.3 Color Coat Apply sufficient basecoat to achieve 18 - 25 m. Flash 2 minutes. Apply sufficient clearcoat to achieve a clearcoat film thickness of 25 - 33 m. Flash 8 - 10 minutes. Bake the test panels approximatel
18、y 30 min at 127 - 132 C to achieve a surface temperature above 116 C for 20 - 25 min with the peak surface temperature exceeding 121 C for 15 - 20 minutes. Unless otherwise specified, the combined basecoat/clearcoat shall be contained within a 43 - 56 m range for evaluation of appearance, film and r
19、esistance properties described in this specification. ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright 2012, Ford Global Technologies, Inc. Page 4 of 8 3.4 APPEARANCE 3.4.1 Color (FLTM BI 109-01) Shall match the Ford Motor Company master panel after all of the baking cycles described in
20、 para 3.3.3. 3.4.2 Gloss, All Colors, min (FLTM BI 110-01, 60 Glossmeter) Shall match the gloss obtained on the approved master sample or the initial sample approved by the Design Center. 3.4.3 Gloss After Rebake (60 Gardner Glossmeter) No more than 4 units decrease in gloss is permitted when panel
21、is rebaked per para 3.3.3. 3.4.4 General The enamel shall bake out to a presentable serviceable film showing no craters, pinholes, seediness, abnormal roughness or excessive metallic mottling. It shall have a reasonable tolerance for ordinary cleaning, and exhibit no dulling or color change when was
22、hed with various commercially available cleaners. 3.5 FILM PROPERTIES 3.5.1 Film Hardness Shall be sufficiently hard at time of packing to withstand normal handling. 3.5.2 Adhesion (FLTM BI 106-01) No chipping over sanded or unsanded primer and no loss of adhesion of the clearcoat from the basecoat.
23、 3.5.3 Flexibility No cracking when bent over a 25 mm mandrel at: . 23 +/- 2 C . - 20 +/- 1 C 3.5.4 Bleeding Not permitted (FLTM BI 114-01) ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright 2012, Ford Global Technologies, Inc. Page 5 of 8 3.5.5 Elongation, min 60% Test Method: Prepare pa
24、nels per para 3.3, using ESB-M2D263-A3 RIM urethane and ESB-M6J123-C primer. . Cut 3 samples per ASTM D 412 referenced Die C specifications. The neck of all test specimens should be free of all imperfections such as dirt, blisters, etc. Notches in the edge of the paint film may be removed with light
25、 sanding. . Elongate test sample at 50 mm per min and at 23 +/- 2 C until the first crack occurs in the paint film. . Measure the % elongation on each of the 3 test specimens. Use the average of 3 values as the reported % elongation. 3.6 RESISTANCE PROPERTIES 3.6.1 Water Resistance, min 240 h (FLTM
26、BI 104-01) Test Method: Immerse the panels for 240 h in distilled or deionized water maintained at 32 +/- 1 C. Remove parts from the water and immediately scribe an X through the enamel to the substrate. Dry the scribed area with a paper towel, cloth or air pressure and immediately apply, with firm
27、thumb pressure, a min of 13 cm2 of ESF-M3G48 tape*. Remove the tape by pulling one end at 90 angle at a moderate speed. The following conditions shall be basis for rejection: . Removal of paint beyond 1.6 mm from a scribe line. . Any evidence of blistering or dulling of the paint at either the scrib
28、e or any other area of the panel. . Evidence of adhesion loss of the clearcoat from the basecoat. 3.6.2 Weathering Resistance Panels prepared in accordance with para 3.3 shall show a min degree of fading, chalking or dulling. No cracking when bent over a 50 mm mandrel on a 2.5 - 3.8 mm thick elastom
29、eric substrate. No increase of brittleness or loss of adhesion is permitted and panels shall be completely free from evidence of cracking, checking, blistering or peeling when exposed as follows: ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright 2012, Ford Global Technologies, Inc. Page
30、6 of 8 *3M 798 filament tape may be substituted for the ESF-M3G48 tape. . Florida Exposure (Miami Area): 60 Months at 5 facing South. . Accelerated Weathering: 2000 h (FLTM BO 101-01) Atlas “XW“ Weatherometer for initial paint qualification on typical approved production substrate. 3.6.3 Thermal Sho
31、ck Resistance (FLTM BI 107-05) The enamel shall exhibit no blistering or loss of adhesion when subjected to the following cycle. . 4 h water immersion. . 4 h minimum exposure at - 29 C. . Direct steam blast on scribed X at 45 angle 50 mm - 75 mm from panel for 15 s minimum. 3.6.4 Resistance to Water
32、 and Soap Spotting (FLTM BI 113-01, except use of colorimeter is omitted) 3.6.5 Resistance to Acid Spotting (FLTM BI 113-02, except use of colorimeter is omitted) The enamel shall exhibit no more dulling or color change than the approved master sample on file in the Body Materials Laboratory. 3.6.6
33、Gasoline Resistance Shall exhibit no softening, dulling, color transfer, color change, blistering or show any evidence of loss of adhesion. Test Method: A burette must be used to allow gasoline to drip at a rate which requires approx. 1 h for the 50 mL to be exhausted (approx. 1 drop every 3 sec.).
34、ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright 2012, Ford Global Technologies, Inc. Page 7 of 8 *Gasoline - Use commercially available: (Use both): 1. 87 octane unleaded (Leadfree) 2. Alcohol blend (Gasohol): Size of Panel: 150 x 200 mm Caution: Use well-ventilated hood. This test sha
35、ll be conducted at room temperature (25 C) on panels or parts cured at the minimum specification requirements. Evaluation for softening, dulling, loss of adhesion, etc. shall be conducted within 1 minute after removal from the test environment. 3.6.7 Oil Resistance The enamel shall exhibit no soften
36、ing, dulling, color transfer, color change, blistering or show any evidence of loss of adhesion. Test Method: Place the painted panel in Rotunda Motor Oil (SAE 10W30). After 1 h at 21 C min, remove the panel and wipe the painted surface. ENGINEERING MATERIAL SPECIFICATION ESB-M2J218-A1/A2 Copyright
37、2012, Ford Global Technologies, Inc. Page 8 of 8 3.6.8 Resistance to Scuffing (FLTM BN 108-04, 5000 cycles using scuff head “A“ under a 0.91 kg load) No cracks in the enamel transverse to the direction of motion, and no removal of the enamel is permitted. Note: Slight circular scratches in the direc
38、tion of motion are not considered evidence of failure. 3.6.9 Heat Resistance There shall be no evidence of cracking, checking, or color change after exposure in a mechanical convection oven for 30 min at 121 +/- 3 C. 3.6.10 Chip Resistance There shall be no chipping when a 2.54 - 3.81 mm thick speci
39、men is subjected to 10 cycles as described in SAE J 400 (Test for chip resistance of surface coatings). Specimen must be supported on the back with a 0.9 mm min thick steel panel. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requireme
40、nts of this specification. 5.1 FLASH POINT Below 27 C 5.2 FLAMMABILITY This material represents a potential fire hazard. The Manufacturing Engineering Department shall notify both the Plant Security and the Safety Units of its presence in the Plant to assure that proper fire precautions are provided. The location in which it is used or stored shall be included in the notification.
