1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 01 2014 05 16 Act/Revised Released B5 and Revised B4. See Summery of Rev. W. Janitschke, EU 2009 08 19 Activated Released WSS-M4G177-B4 M. Mehandru, NA Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1
2、of 7 SEALER, VINYL BASED, SELF-LEVELING, HEAT CURE, PAINTABLE, WSS-M4G177-B4 PUMBABLE FOR ELECTROCOATED SUBSTRATES SEALER, VINYL BASED, SELF-LEVELING, HEAT CURE, PAINTABLE, WSS-M4G177-B5 EXPANDING, PUMBABLE FOR ELECTROCOATED SUBSTRATES 1. SCOPE The material defined by this specification is a lead fr
3、ee vinyl based, self-leveling, paintable, heat curing sealer with (-B5) or without (-B4) expanding properties. 2. APPLICATION This specification was released originally for sealing exterior body seams, such as drip rail to roof ditch including a molding, and is intended for use over freshly baked el
4、ectrocoat primer. Acceptable paintability is achieved with or without primer surfacer on sealer. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2
5、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, yield stress, apparent activation energy for viscosity and appar
6、ent 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 96% min (ASTM D 2834, except heat at 102 +/- 1 C for 3 h in a mechanical convectional oven. Save sample for next test, para 3.4) 3.4 ASH 36
7、% 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. 3.5 WEIGHT PER VOLUME 1.35 -1.68 kg/L (ASTM D 816) The weight tolerance for any one supplier shall be +/- 0.02 kg
8、/L, based on the recorded weight of their original approved production sample. ENGINEERING MATERIAL SPECIFICATION WSS-M4G177-B4/B5 Copyright 2014, Ford Global Technologies, LLC Page 2 of 7 3.6 VISCOSITY (SAE J 1524, VIS-2, 1.32 mm orifice, 280 kPa) Final approval of a specific material viscosity for
9、 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 tolerance for any one supplier shall be +/- 10%, based on the recorded viscosity of the original approved p
10、roduction sample. 3.6.1 As Received 4 - 30 s (Unagitated, Method A) 3.6.2 Aged, max 50 s increase max (Material aged in closed from initial viscosity container for 72 h at 40 +/- 1 C, conditioning Method A) The supplier shall provide a viscosity profile versus temperature at 16 oC, 20 C, 23 C, 27 oC
11、, 43 oC, and after 2 weeks at 32oC 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 specification limits. 3.7 FLOW RATE (Initial at 23 +/- 2 C and 20 300 mm after 90 days storage
12、 at 23 +/- 2 C and 32 +/- 2 C) The flow rate tolerance for any one supplier shall be +/- 10%, based on the recorded flow rate of the original approved production sample. Test 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
13、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 4.3. Remove test assembly from heat exposure and measure the total amount of flow. Final approval of a specific material flow
14、 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 Plan. ENGINEERING MATERIAL SPECIFICATION WSS-M4G177-B4/B5 Copyright 2014, Ford Global Technologies, LLC Page 3 of 7 3.8 ADHESION
15、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 4.2. Subject one test panel to the minimum bake and the other test panel to the maximum bake identified per para 4.3. Evaluate adhesion by cutting a
16、 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 from substrate. 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
17、hours at 70C) cracking, charring or other deleterious effects Test Method: Examine the test material prepared for Adhesion Test, per para 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 materi
18、al adhesion as described in para 3.8. Observe for any evidence of corrosion originating directly under material. 3.11 MANDREL BEND TEST No cracking or (FLTM BV 122-01, substrates per adhesion failure para 4.2, material bake schedule per para 4.3, heat age test specimen 14 days at 70 +/- 1 C before t
19、est) 3.11.1 Test at 23 +/- 2 C 3.12 COMPATIBILITY WITH PRODUCTION PAINTS - INITIAL REQUIREMENTS No tackiness, staining, discoloration, or other objectionable appearance defects in the paint over the sealer. Note: Evidence of any defects as stated above shall be reviewed with Paint Engineering, and M
20、aterials Engineering. 3.12.1 Xenon Arc Weatherometer (SAE J2527 modified Type “S“ borosilicate inner and outer filters, 0.55 W/m2 radiant exposure 500 h exposure) 3.12.2 336 h Heat Age at 70 +/- 2C Test Method: ENGINEERING MATERIAL SPECIFICATION WSS-M4G177-B4/B5 Copyright 2014, Ford Global Technolog
21、ies, LLC Page 4 of 7 Prepare ten test panels, use a primer bake and a topcoat bake per para 4.3.1. Apply current product paints as identified by paint engineering. Condition painted panels at 23 +/- 2C for 72 h. Subject three bake panel to each exposure listed above. Retain extra panel as control an
22、d for low temperature resistance test. After, exposure, examine test panels and compare to the control panel. Cross hatch adhesion check - FLTM BI 106-01, Method 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 wett
23、ed with xylene. 3.13 REPAINT 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. Paint three test panels (lids) each for minimum bake and maximum bake, per para 4.3.1. or 4.3.2 depending upon t
24、he plant paint system. Apply current production paints 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. 3.14 SHE
25、AR ADHESION (SAE J1523, substrate per para 4.2, 0.25 mm bondline thickness, 6.45 cm2 overlap, material bake per para 4.3) 3.14.1 Minimum bake 2.5 MPa min 3.14.2 Maximum bake 2.5 MPa min 3.15 HARDNESS, DUROMETER, A 60 - 80 (ASTM D 2240) The hardness tolerance for any one supplier shall be +/- 5 based
26、 on the recorded hardness of their originally approved production sample. 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 for 20 minutes. Condition test sample at 23 +/- 2 C for 4 h, then check instantaneous
27、material hardness. ENGINEERING MATERIAL SPECIFICATION WSS-M4G177-B4/B5 Copyright 2014, Ford Global Technologies, LLC Page 5 of 7 3.16 LOW TEMPERATURE RESISTANCE 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
28、+/- 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. 3.17 CURED SEALANT PROPERTIES 3.17.1 Normal Tensile Strength 2.5 MPa min (ASTM D 412, die C, pulled at 300 mm/min. Minimum 5 samples per minimum bake para 4.3.)
29、 Elongation 70% min Tear Strength 10.0 N/mm min (ASTM D 624, Die C, pulled at 500 mm/min. minimum bake per para 4.3.) 3.17.2 Aged (Cured samples aged 2 weeks 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 4.3.) Elonga
30、tion 70% min Tear Strength 10.0 N/mm min (ASTM D 624, Die C, pulled at 500 mm/min Minimum 5 samples per minimum bake per para 4.3.) 3.18 ABRASIVES None Test Method: Dilute a 1 g sample of the material with 1 g of M14J507 Naptha or equivalent, and mix thoroughly. Rub a portion of the diluted material
31、 100 times between 2 pieces of flat, clean plate glass. The appearance of scratches on the glass plate shall be considered failure. 3.19 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 s
32、torage conditions, the shelf life of the material shall be 3 months from the date of receipt at the plant. When these materials are stored at temperatures below 23 C, they shall be conditioned at room temperature prior to ENGINEERING MATERIAL SPECIFICATION WSS-M4G177-B4/B5 Copyright 2014, Ford Globa
33、l Technologies, LLC Page 6 of 7 application. Adequate conditioning permits the material to obtain its optimum application properties. Material may not be used after the expiration date unless the supplier has given written documentation to Materials Engineering and the affected Manufacturing Plant t
34、hat 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. 3.20 FUNCTIONAL APPROVAL Materials being evaluated for approval to this specification shall be subjected to a pro
35、duction 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 release. 3.21 VOLUME EXPANSION (for WSS-M4G177-B5 only) 15 % - 25 % Test Method: 3.21.1 Determin
36、e the volume V1 of clean 150 x 25 mm test panels. 3.21.2 Apply test material in the groove of the test panel, scrape flush with the adjoining surfaces and determine volume V2. 3.21.3 Expose test specimens in a mechanical convection oven to the min curing cycle. The test specimens are to be cured in
37、a horizontal position and protected from direct air flow. After heat curing and cooling to room temperature determine volume V3. V3 - V2 % Volume Expansion = - x 100 V2 - V1 Where: V1 - Volume of the test panel V2 - Volume of the test panel and material V3 - Volume of the test panel and material aft
38、er cure. 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 MECHANICAL CONVECTION OVEN The mechanical oven(s) used to cure the ma
39、terial shall be capable of obtaining 205 C metal temperature on body steel (0.89 -0.09 mm thickness) within 8 -10 min. 4.2 SUBSTRATES Electrocoat primed steel panel or HDG panel (as per manufacturing facility) 100 x 300 x 0.90 mm prepared per ESB-M2P4 performance specification. Use current productio
40、n paints as identified by the Global Paint Engineering. 4.3 BAKE SCHEDULES According to FLTM BV 150-05 for each individual region. ENGINEERING MATERIAL SPECIFICATION WSS-M4G177-B4/B5 Copyright 2014, Ford Global Technologies, LLC Page 7 of 7 4.8 VOLATILE ORGANIC CONTENT 1500 max ppm For interior appl
41、ied materials only. VDA 278 (Thermodesorption), cured material, per min cycle as in FLTM BV 150-05 for each region to be used. 5. SUMMARY OF REVISIONS 2014 05 16 Updated para 3.10 Corrosion Test Copied values from para. 4.4 to 4.7 to the individual requirements. Test method to VOC added (4.8). Volumen Expansion added (3.21) New Spec WSS-M4G177-B5 added Scope updated FIGURE I
