1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 03 2016 12 02 Revised See Summary of Revisions S. Short, NA 2016 11 07 Revised See Summary of Revisions S. Short, NA 1995 11 22 Activated W. Curtiss, G. Molnar, NA Copyright 2016, Ford Global Technologies, LLC Page 1 of 10 SEALER, VINYL
2、BASED, SELF-LEVELING, PAINTABLE, WSB-M4G177-D BIOCIDE ENHANCED, IMPROVED PAINTABILITY 1. SCOPE The material defined by this specification is a vinyl based, self-leveling, paintable, heat curing sealer. This material has biocide added and has improved paintability. 2. APPLICATION This specification w
3、as released originally for sealing the roof ditch and is intended for use over electrocoat primer. Acceptable paintability is achieved with or without sealer gel bake. Ultraviolet light absorbers, light stabilizers, and biocide have been added to these materials to improve paint durability. 3. REQUI
4、REMENTS 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at
5、 or available externally through a Ford Materials Engineer. 3.2 RHEOLOGY Suppliers must submit flow characterization data to Ford Motor Company for flow modeling and process window determination. For a specified temperature range, the requested properties include, but are not limited to, viscosity,
6、yield stress, apparent activation energy for viscosity and apparent activation energy for yield stress. This data constitutes the reference standard and shall be kept on file at the designated material laboratory. 3.3 SOLIDS 95% min (ASTM D2834, except heat at 102 +/- 1 C for 3 h in a mechanical con
7、vectional oven. Save sample for next test, para 3.4) 3.4 ASH +/- 5% max (ISO 3491, Method A, 760 +/- 30 C) The ash content tolerance for any one supplier shall be +/- 5 % based on the recorded ash content for their originally approved production sample (refer to para 4.1). 3.5 WEIGHT PER VOLUME +/-
8、0.02 kg/L (ASTM D816) The weight tolerance for any one supplier shall be +/- 0.02 kg/L, based on the recorded weight of their original approved production sample (refer to para 4.2). ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford Global Technologies, LLC Page 2 of 9 3.6 VISCOSI
9、TY (SAE J1524, VIS-2, 1.32 mm orifice, 280 kPa) Final approval of a specific material viscosity for production shipments shall be made by the affected manufacturing activity. In all cases, the viscosity shall be within process limits as identified on the material control plan. The viscosity toleranc
10、e for any one supplier shall be +/- 10%, based on the recorded viscosity of the original approved production sample. Reference para 4.3. 3.6.1 As Received +/- 10% (Conditioning Method A) 3.6.2 Aged No more than 100% (Material aged in closed increase from container for 72 h at 40 +/- original approva
11、l 1 C, conditioning Method A) The supplier shall provide a viscosity profile versus temperature at 16oC, 20 C, 23 C, 27 C, 43 C, and after 2 weeks at 32 C 3.6.3 90 Day Storage Stability at 23 +/-2 C and 32 +/- 2 C The supplier shall provide a viscosity profile versus time from initial through 90 day
12、s storage at 23 +/- 2 C and 32 +/-2 C. Measurements shall be taken at weekly intervals. Curves shall be made available to Materials Engineering prior to addition on the Approved Source List. 3.7 FLOW RATE 15 - 250 mm (Initial at 23 +/- 2 C and after 90 days storage at 23 +/- 2 C and 32 +/- 2 C) Test
13、 Method: Block the 6.4 mm groove in the flow rate fixture (Fig. 1) 150 mm from the top edge. Fill the 150 mm upper portion of the groove with material specified in this specification. Remove the block, allow material to flow for 30 minutes, then subject the test assembly to the minimum bake per para
14、 4.4. Remove test assembly from heat exposure and measure the total amount of flow. Final approval of a specific material flow rate for production shipments shall be made by the affected manufacturing activity. In all cases, the flow rate shall be within limits identified on the Material Control Pla
15、n. ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford Global Technologies, LLC Page 3 of 9 3.8 ADHESION Shall not be peeled off in a continuous film. Test Method: . Apply a ribbon of material, 25 x 200 x 3 mm on two electrocoated panels, identified per para 4.5. . Subject one test
16、panel to the minimum bake schedule and the other test panel to the maximum bake schedule identified per para 4.4. . Evaluate adhesion by cutting a 25 mm wide strip across the ribbon. Using the tip of a square spatula, lift the material, then attempt to hand peel material at 90 deg from substrate. .
17、Save test panels for heat resistance test, para 3.9, and corrosion resistance test, para 3.10. 3.9 HEAT RESISTANCE TEST No evidence of blistering, (336 h Heat Age at 70 +/- 2 C) cracking, charring or other deleterious effects Test Method: . Examine the test material prepared for Adhesion Test, para
18、3.8, for any of the above conditions. 3.10 LABORATORY ACCELETRATED CYCLIC No corrosion or CORROSION TEST adhesion loss (CETP 00.00-L-467, 6 weeks) Evaluate material adhesion as described in para 3.8. Observe for any evidence of corrosion originating directly under material. 3.11 MANDREL BEND TEST No
19、 cracking or (FLTM BV 122-01, substrates per adhesion failure para 4.5, material bake schedule per para 4.4, heat age test specimen 14 days at 70 +/- 1 C before test) Test at 23 +/- 2 C ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford Global Technologies, LLC Page 4 of 9 3.12 COM
20、PATIBILITY WITH PRODUCTION PAINTS - INITIAL REQUIREMENTS No tackiness, staining, discoloration, dulling, softening, paint transfer, significant color shift, difference in orientation of metallic flakes (metallic paints) or other objectionable appearance defects in the paint over the sealer. Note: Ev
21、idence of any defects as stated above shall be reviewed with Body and Assembly Paint Operations and Materials Engineering. Test Method: . Prepare test panels per matrix provided by the material engineering of the region. Use current production paints as identified by the Paint Engineering. Panels sh
22、all be kept horizontal prior to baking, during the painting operation and during cure. Use gas fired oven for paint cure. . Condition painted panels at 23 +/- 2 C for 4 - 24 h. . After 4 - 24 h at 23 +/- 2 C, perform the following tests on each panel: . Cross hatch adhesion check - FLTM BI 106-01, M
23、ethod B . Resistance to Xylene - Using a back and forth motion, rub surface of enamel 10 times with a small wad of cheesecloth which has been wetted with xylene. 3.13 COMPATIBILITY WITH PRODUCTION PAINTS - WEATHERING REQUIREMENTS No tackiness, staining, discoloration, chalking, gloss change or other
24、 deleterious effects on topcoats when compared to paint not over sealer. After 2 years Florida exposure, 5 % adhesion loss and 20 % UVA loss maximum when compared to paint not over sealer. Test Method: Prepare test panels per matrix provided by the material engineering of the region. Use current pro
25、duction paints as identified by the Paint Engineering. Panels shall be kept horizontal prior to baking, during the painting operation and during cure. . Condition painted panels at 23 +/- 2 C for 72 h. . Subject panels for each paint/bake condition to each exposure listed below. Retain an unexposed
26、panel as control. 3.13.1 3750 h Xenon ARC (D7869, modified borosilicate inner and outer filters, 0.55 W/m2. Panels are reviewed initially and at 2000 h intervals.) 3.13.2 2 year Florida Exposure (SAE J1976, panels are washed and reviewed yearly. Note: Examine panels for evidence of fungal growth PRI
27、OR to washing. Reference para 3.19.). ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford Global Technologies, LLC Page 5 of 9 After exposure, perform the following evaluations on each panel: . Cross hatch adhesion test per FLTM BI 106-01, Method B . UVA extraction per FLTM BI 126-0
28、1 . Examine test panels and compare to the control panel and to the paint not over sealer side of the panel for evidence of fungal growth (prior to washing), tackiness, staining, discoloration, gloss change, adhesion loss, UVA loss or other deleterious effects on topcoats. 3.14 LOW TEMPERATURE RESIS
29、TANCE No cracking or (FLTM BV 101-02) adhesion failure Test Method: . Condition the white and silver panels prepared in para 3.12 for 7 days at 70 +/- 1 C. . Place the panels in the slamming apparatus and condition for 4 h at - 29 +/- 1 C. . The panels shall be slammed a total of 10 times. 3.15 REPA
30、INT CRACK RESISTANCE No cracks Test Method: Fill the inside cover of six can lids with sealer. The lids will have a nominal diameter of 70 mm and a depth of 6 mm (see para 4.6). Paint three test panels (lids) per matrix provided by the material engineering of the region Apply current production pain
31、ts as identified by the Paint Engineering Expose painted lids to the following paint repair cycles 10 times: 140 +/- 2 C for 17 minutes oven time 23 +/- 2 C for 20 minutes Observe for any evidence of paint/sealer cracking after each cycle. 3.16 SHEAR ADHESION (SAE J1523, substrate per para 4.5, 0.25
32、 mm bondline thickness, 6.45 cm2 overlap, material bake schedules per para 4.4) 3.16.1 Minimum bake 2.5 MPa min 3.16.2 Maximum bake 2.5 MPa min 3.17 HARDNESS, DUROMETER, A +/- 5 (ASTM D 2240) The hardness tolerance for any one supplier shall be +/- 5 based on the recorded hardness of their originall
33、y approved production sample. Reference para 4.7. ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford Global Technologies, LLC Page 6 of 9 Test Method: . Apply enough material into a container (such as an ointment tin) to give a 6.4 mm thickness slab. . Bake material at 149 +/- 1 C
34、for 20 minutes. . Condition test sample at 23 +/- 2 C for 4 h, then check instantaneous material hardness. 3.18 CURED SEALANT PROPERTIES 3.18.1 Normal Tensile Strength 2.5 MPa min (ASTM D 412, die C, pulled at 300 mm/min. Minimum 5 samples per minimum bake per para 4.4) Elongation 70% min Tear Stren
35、gth 9.0 N/mm min (ASTM D 624, Die C, pulled at 500 mm/min. Minimum 5 samples minimum bake per para 4.4) 3.18.2 Aged (Cured samples aged 2 w at 90 +/- 2 C) Tensile Strength 2.5 MPa min (ASTM D 412, die C, pulled at 300 mm/min. Minimum 5 samples per minimum bake per para 4.4) Elongation 70% min Tear S
36、trength 10.0 N/mm min (ASTM D 624, Die C, pulled at 500 mm/min Minimum 5 samples per minimum bake per para 4.4) 3.19 BACTERIA/FUNGUS RESISTANCE - FLORIDA EXPOSURE Florida Exposure Examine panels prepared and exposed per para 3.13.2. Panels shall be examined after 3 and 6 months for evidence of funga
37、l growth. Do not wash panels after the 3 and 6 month review. Panels will be washed yearly. Growth observed on the painted sealer shall be comparable to growth on paint not over sealer. Any growth shall be easily removed by washing. ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford
38、 Global Technologies, LLC Page 7 of 9 3.20 ABRASIVES None Test Method: . Dilute a 1 g sample of the material with 1 g of petroleum naphtha or equivalent, and mix thoroughly. . Rub a portion of the diluted material 100 times between 2 pieces of flat, clean plate glass. The appearance of scratches on
39、the glass plate shall be considered failure. 3.21 STORAGE STABILITY The material shall be stored at temperatures below 40 C away from all sources of heat and sunlight. Heat greatly accelerates aging. Under these storage conditions, the shelf life of the material shall be 3 months from the date of ma
40、nufacture. When these materials are stored at temperatures below 23 C, they shall be conditioned at room temperature prior to application. Adequate conditioning permits the material to obtain its optimum application properties. Material may not be used after the expiration date unless the supplier h
41、as given written documentation to Materials Engineering and the affected Manufacturing Plant that the material conforms to requirements outlined in the material control plan. The supplier shall also indicate in the letter the number of additional days the material will be usable. 3.22 FUNCTIONAL APP
42、ROVAL Materials being evaluated for approval to this specification shall be subjected to a production trial. Functional trial results must be approved by the affected assembly operation and Design Engineering. Results shall be made available to Materials Engineering prior to material approval and re
43、lease. 3.23 TESTING REQUIREMENTS Test Material Approval Functional Trial Annual Every Lot 3.2 Rheology X X 3.3 Solids, Min (ASTM D 2834) X X 3.4 Ash, Max (ISO 3491) X 3.5 Weight Per Volume (ASTM D 816) X X 3.6 Viscosity (SAE J1524) X X 3.7 Flow Rate X X 3.8 Adhesion X X 3.9 Heat Resistance Test X X
44、3.10 Laboratory Accelerated Cyclic Corrosion Test X X 3.11 Mandrel Bend Test (FLTM BV 122-01) X X 3.12 Compatibility with Production Paints-Initial X X 3.13 Compatibility with Production Paints-Weathered X 3.14 Low Temperature X X ENGINEERING MATERIAL SPECIFICATION WSB-M4G177-D Copyright 2016, Ford
45、Global Technologies, LLC Page 8 of 9 Resistance (FLTM BV 101-02) 3.15 Repaint Crack Resistance X 3.16 Shear Adhesion (SAE J1523) X 3.17 Hardness (ASTM D 2240) X X 3.18 Cured Sealant Properties X X 3.19 Bacteria/Fungus Resistance X 3.20 Abrasives X 3.21 Storage Stability X 3.22 Functional Approval X
46、X 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 ASH, Typical 34% (Refer to para 3.4) 4.2 WEIGHT PER VOLUME, Typical 1.2 - 1.
47、7 kg/L (Refer to para 3.5) 4.3 VISCOSITY, Typical 25 - 100 s (As Received; refer to para 3.6) Viscosity is dependent on rheological properties of the material. 4.4 BAKE SCHEDULES According to FLTM BV 150-05 for each individual region. 4.5 SUBSTRATES Electrocoat primed steel panel or HDG panel (as pe
48、r manufacturing facility) 100 x 300 x 0.90 mm. Use current production paints as identified by paint engineering. 4.6 REPAINT CRACK RESISTANCE Originally performed in 500 ml can lids. 4.7 HARDNESS, Durometer A, Typical 60 - 80 4.8 VOLATILE ORGANIC CONTENT 1500 ppm 4.9 APPROVAL OF MATERIALS Suppliers
49、desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the ENGINEERING MATERIAL SPECIFICATION WSB-M
