1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 1 2013 12 12 Revised See Summary of Revisions B. Witkowski, NA 2013 09 09 Released B. Witkowski, NA Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1 of 6 SEALER, SILANE MODIFIED POLYMER, ONE COMPONENT,
2、WSS-M4G450-A1 MOISTURE CURING, EXTERIOR 1. SCOPE The material defined by this specification is a solvent free, one component, silane modified polymer sealer which cures at room temperature in the presence of moisture. 2. APPLICATION This specification was released originally for sealing exterior joi
3、nts of painted body panels e. g. side panels of Transit. The material is intended to be applied over freshly baked topcoat body panels. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Prod
4、uction Materials (WSS-M99P1111-A). 3.2 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless oth
5、erwise specified. 3.3 COLOR Gray 3.4 SOLIDS 98 % min (FLTM BV 150-10) 3.5 ASH 60% max (FLTM BV 150-10) 3.6 WEIGHT PER VOLUME 1.3-1.6 kg/L (ASTM D 816) The weight tolerance for any one supplier shall be +/- 0.05 kg/L, based on the recorded weight of their original approved production sample. ENGINEER
6、ING MATERIAL SPECIFICATION WSS-M4G450-A1 Copyright 2013, Ford Global Technologies, LLC Page 2 of 6 3.7 VISCOSITY at 23 C (FLTM BV 103-01, 2 mm orifice, 2.8 bar) 3.7.1 As received 100 s max Final approval of a specific material viscosity for production shipments shall be made by the affected manufact
7、uring 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 production sample. 3.7.2 After aging 150 s max (14 d at 40 +/
8、- 2 C) 3.7.3 Rheology Suppliers must submit flow characterization data to Ford Motor Company for flow modeling and process window determination. For a specified temperature range (15 to 50 C), the requested properties include, but are not limited to, viscosity, yield stress, apparent activation ener
9、gy for viscosity and apparent activation energy for yield stress. This data constitutes the referenced standard and shall be kept on file at the designated material laboratory. 3.8 FLOW RATE at 40 +/- 2 C No sagging (FLTM BV 153-01, Method A and B) Dispense material to painted panel, from cartridge
10、using 8mm bead, do not use template, no pre-mixing required. Place in oven at 40 +/- 2 C immediately after application and evaluate movement after tack free. 3.9 CURE RATE . Apply a 150 x 6 mm diameter bead to production painted panel. . Cure material at 23 +/- 2 C and 50 +/- 5 % relative humidity.
11、. Test cure rate. Tack free 0.5 h max Completely cured 168 h max 3.10 CURED MATERIAL PROPERTIES Apply sealer and allow to cure 168 hrs at 23 +/- 2 C and 50 +/- 5 % relative humidity 3.10.1 Shrinkage after curing 5 % max Test Method: . Apply to a release paper two beads of material under test in dime
12、nsions of 50 x 8 x 5 mm and determine exact volume by water displacement method. . Age test samples at 90 +/- 2 C for 14 days. . Determine exact volume of material under test once again and calculate volume shrinkage. ENGINEERING MATERIAL SPECIFICATION WSS-M4G450-A1 Copyright 2013, Ford Global Techn
13、ologies, LLC Page 3 of 6 It is defined as Volume Shrinkage V2-V1 = - x 100 % V1 Where: V1 = Volume of unbaked adhesive V2 = Volume of baked adhesive 3.10.2 Tensile Strength at Break 0.7 MPa min (ASTM D 412, die C, 200 mm/minute test speed, 5 samples) 3.10.2.1 Original at 23 +/- 2 C 3.10.2.2 After He
14、at Ageing (14 d at 90 +/- 2 C, 1 h at 23 +/- 2 C) 3.10.2.3 After Environmental Cycling Test Method: Samples must be exposed four times to the following cycle in the sequence indicated below: 16 hours at 38 +/- 2 C and 98 +/- 2% RH 4 hours at minus 40 +/- 1 C 4 hours at 90 +/- 2 C After four cycles s
15、pecimens are to be stored at 23 +/- 2 C for 72 hours before testing. 3.10.3 Elongation at Break 200 % min (Test according to para 3.10.2) 3.10.3.1 Original at 23 +/- 2 C 3.10.3.2 After Heat Ageing (14 d at 90 +/- 2 C, 1 h at 23 +/- 2 C) 3.10.3.3 After Environmental Cycling Samples must be exposed fo
16、ur times to the following cycle in the sequence indicated below: 16 hours at 38 +/- 2 C and 98 +/- 2% RH 4 hours at minus 40 +/- 1 C 4 hours at 90 +/- 2 C After four cycles specimens are to be stored at 23 +/- 2 C for 72 hours before testing. ENGINEERING MATERIAL SPECIFICATION WSS-M4G450-A1 Copyrigh
17、t 2013, Ford Global Technologies, LLC Page 4 of 6 3.10.4 Weathering Resistance Test panels shall show no surface cracking, crazing, delamination, tackiness, loss of sealing function, or other surface defects after exposure to test conditions for 3.10.4.1 and 3.10.4.2. . 3.10.4.1 Xenon Arc Weatherome
18、ter (SAE J2527, 0.55 W/m2 Irradiance, 3000h, Borosilicate inner and outer filters, Atlas Water Cooled, Rotary Drum Xenon-Arc Apparatus only, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick) 3.10.4.2 12 months Florida (SAE J1976, 5 deg south, direct weathering inland, specimen size: 150 x 100 m
19、m min, 3.2 +/- 0.2 mm thick) 3.11 SHEAR STRENGTH 0.6 MPa min (FLTM BV 154-03 Section B, para 1 & 2) Test Method: . Test panels are to be prepared according to FLTM BV 154-03 section B, para. 1 & 2 by using production painted body steel specimens: 100 x 25 x 0.75 (+/- 0.5 mm). . Apply sealer at 23 +/
20、- 2 C to the end of the painted surface and assemble with the end of another painted panel to get a bonding area in dimensions of 20 x 25 with 1 mm thickness. Remove squeezed out material. . Allow sealer to cure 168 hrs at 23 +/- 2 C and 50 +/- 5 % relative humidity. . Determine shear strength at a
21、speed of testing of 25 mm/minute. A minimum of 5 specimens shall be tested. Report actual values and failure modes. 3.11.1 Original Measured at 23 +/- 2 C 0.6 MPa min Measured at 90 +/- 2 C * 0.3 MPa min Measured at - 40 +/- 1 C 1.0 MPa min 3.11.2 After Heat Aging 0.6 MPa min (14 d at 90 +/- 2 C, 1
22、h at 23 +/- 2 C) 3.11.3 After Water Immersion 0.6 MPa min (240 h immersion at 32 +/- 1 C FLTM BI 104-01). 3.11.4 After Humidity Aging 0.6 MPa min (14 d at 38 +/- 2 C and 98 +/- 2 % relative humidity, 1 h at 23 +/- 2 C) 3.11.5 After Environmental Cycling 0.6 MPa min Test Method: Samples must be expos
23、ed four times to the following cycle in the sequence indicated as following: ENGINEERING MATERIAL SPECIFICATION WSS-M4G450-A1 Copyright 2013, Ford Global Technologies, LLC Page 5 of 6 16 h at 38 +/- 2 C and 98 +/- 2 % relative humidity 4 h at - 40 +/- 1 C 4 h at 90 +/- 2 C After four cycles specimen
24、s to be stored at 23 +/- 2 C for 72 hours before testing. 3.12 STORAGE STABILITY Minimum 6 months from date of manufacture when stored between 5 C and 32 C in unopened drums out of direct sunlight, no material shall be shipped longer than 3 months from date of manufacture. 3.13 FUNCTIONAL APPROVAL M
25、aterials 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 release.
26、3.14 ADHESION Shall not be peeled off in a continuous film at any thickness. Test Method: Apply 6.4 - 0 mm tapered material ribbon on paint panel per 4.1. See sketch below. Allow sealer to cure 168 hrs at 23 +/- 2 C and 50 +/- 5 % relative humidity Evaluate adhesion by cutting a 25 mm wide strip acr
27、oss the tapered ribbon. Using the tip of a square spatula, lift the material at both the thin and thick film edges then attempt to hand peel material at 90 degrees from substrate. Save test panels for appearance per 3.15 Adhesion testing must be performed for each paint system and bake conditions fo
28、r the region of use, for all colors and topcoat/clearcoat materials, originally released paint materials to be provided with material approval package. ENGINEERING MATERIAL SPECIFICATION WSS-M4G450-A1 Copyright 2013, Ford Global Technologies, LLC Page 6 of 6 3.15 APPEARANCE No evidence of blistering
29、, cracking, charring or other deleterious effects Examine the test material prepared for 3.14 Adhesion Test, for any of the above conditions. 3.16 QUALITY The material shall be of uniform quality, free from foreign materials and properties detrimental to normal production use. 3.17 ODOR Shall be fre
30、e from objectionable odors as determined by the manufacturing facility, both as received and after storage. 3.18 CLEANER COMPATIBILITY Any application aids such as cleaners must be tested for compatibility with paint systems and shall not cause any loss of properties of the polymer. Paint compatibil
31、ity should be tested per the following: 3.18.1 Fluid Spotting Resistance Rating 4-5 min (FLTM BI 168-01, Method A and B, AATCC Evaluation Procedure 1/ISO 105-A02) Test Fluids: per supplier defined cleaner. No color dulling, surface distortion, or permanent softening permitted. 3.19 MATERIAL CHEMISTR
32、Y Materials approved to this specification must be based on modified silane chemistry. 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 Specificati
33、ons. 4.1 SUBSTRATES Test panels prepared with current production paints as identified by Materials Engineering. Painted specimens must be cured according to FLTM BV 150-05, for each region to be used. 4.2 WEATHEROMETER COLOR RATING Rate panels exposed in 3.10.4.1 and 3.10.4.2 per AATCC Evaluation procedure 1/ISOI 105-A02 and report result. 4.3 SUMMARY OF REVISIONS 2013 12 12 3.10.4 added evaluation criteria, 3.10.4.1 added thickness, Moved color rating from 3.10.4 requirements to general information section 4.2.
