1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions Rev. 1 2008 12 09 Revised See Summary of Revisions M. Mehandru, FNA 2005 01 13 Activated M. Mehandru Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 7 ADHESIVE, MOISTURE CURING URETHANE, ONE COMPONENT, W
2、SS-M2G316-B4 PRIMERLESS CLEARCOAT, INCREASED UV-STABILITY 1. SCOPE The material defined by this specification is a one component moisture curing urethane adhesive which is primerless to clearcoat paint chemistries. The adhesive is formulated to be used with glass primer systems not requiring a black
3、-out primer. 2. APPLICATION This specification was released for material used in conjunction with a one stage clear primer to bond glass windshields, glass rear windows and quarter windows to painted metal surfaces. These materials will bond primerless also to e-coated surfaces that are contaminate
4、free and can also be used in conjunction with metal flange primers. WSS-M2G316-B4 shall be used in assembly plants with silane or non-silane based clearcoat painted metal surfaces. 2.1 MANUFACTURING PROCESS RECOMMENDATION These adhesives are moisture sensitive and require special handling for manual
5、 and automated process. Approved suppliers are responsible for maintaining the accuracy and relevancy of these process parameters (in their Process Standard). Approved suppliers must submit any changes to these process parameters in a timely manner (within 30 days) for review and approval by Materia
6、ls Engineering, Vehicle Operations, and Product Development Engineer. 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 UNCURED ADHESIVE PROPERTIES
7、 3.2.1 VISCOSITY at 23 C (Rotational Rheometer. For Europe only) Tempering Time: 300 s Pause Interval: 180 s at 131 1/s Downward Measure: 131 1/s - 20 1/s in 120 s (30 Measure Points) Viscosity (Pa.s) Yield Point (Pa) 3.2.1.1 As received 1.00 - 1.30 140 150 3.2.1.2 After Aging, max 1.35 - 1.45 100 1
8、40 (336 h at 30 +/- 2 C) ENGINEERING MATERIAL SPECIFICATION WSS-M2G316-B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 7 3.2.2 Rheology (SAE J1524, cone and plate rheometer with 40 mm diameter parallel plates, 500 micron gap, 50 Pa/sec ramp, stress controll
9、ed rheometers use stress range 0 - 3500 Pa, strain controlled rheometers use strain range 0 - 100 sec-1, evaluate material to highest stress of strain as the formulation will allow, report material batch/lot number, identify rheometer make and model, for each test condition report yield stress and s
10、ubmit plots for shear stress vs shear rate, submit plot for viscosity vs temperature at mid-range shear rate. 3.2.2.1 Initial (as received) Test at 23 +/- 1 C Test at application temperature +/- 2 C Test over range 10 to 50 C at increments of 10 C 3.2.2.2 Aged (Age then test at 23 C and application
11、temperature) 7 days at 40 +/- 1 C 90 days at 32 +/- 1 C The rheology variation for any one supplier shall be +/- 30%, based on the recorded rheology of the original approved production sample. The flow curves established for initial approval shall constitute the reference standard and shall be kept
12、on file at the designated material laboratory. All samples shall produce flow curves that correspond to the reference standard when tested under the same conditions. Final approval of material rheology for production shipments shall be made by the affected manufacturing activity. In all cases, the R
13、heology shall be within the limits as identified on the material control plan. 3.2.3 Solids, min 98% (ASTM D 2834, except heat for 3 h at 100 +/- 3 C in a mechanical convection oven or FLTM BV 150-10 ) 3.2.4 Ash, based on solids weight, max 21% (ASTM D 482, or FLTM BV 150-10) 3.2.5 Weight per Volume
14、 (ASTM D 816) The weight tolerance for any one supplier shall be +/- 0.02 kg/L based on the weight of the original approved production sample. Reference paragraph 4.4 3.2.6 Sag, max 4 mm Test Method: . Apply a 76 mm long right triangular shaped bead of material 6 mm wide at the base and 15 mm high o
15、n a glass or steel panel. . Permit the panel to air dry for 30 minutes at R.T. in a plane 60 angle from the horizontal. Measure the sag. ENGINEERING MATERIAL SPECIFICATION WSS-M2G316-B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 7 3.2.7 Sensitivity to Alc
16、ohol CAUTION: Slight traces of alcohol will inhibit the cure of this adhesive. The use of alcohol or alcohol containing solvents is prohibited for cleanup or other uses. 3.2.8 Storage Stability (From date of receipt at Ford Motor Company) Shall be stored at ambient room temperature below 35 C, away
17、from all sources of heat, such as ovens, direct sunlight, etc. Shall not be stored outside. Under these storage conditions, the max shelf life to the material, from date of shipment from the supplier, shall be 4 months stored in close containers. The supplier must label each container to indicate th
18、e expiration date of the material, and production usage beyond the expiration date is not permitted. When stored at temperatures below 23 C, it must be conditioned at R.T. for 72 h prior to use. 3.2.9 Odor, max Rating 2 (FLTM BO 131-03), cured material per 7 days at RT) 3.2.10 Fogging Test (SAE J175
19、6, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 and 16 hrs.) Fog Number, min 90 Any fog film present shall be examined for the formation of droplets or coalescence into a clear film. Such conditions, if present, shall be cause for rejection. Cured samples shall be tested. 3.2.1
20、1 Quality Shall be a smooth homogeneous mixture free from foreign materials and properties detrimental to normal production operation. 3.2.12 Non-Interchangeability of Materials Only approved materials, all from the same production (supplier) source, shall be used in conjunction with one another. EN
21、GINEERING MATERIAL SPECIFICATION WSS-M2G316-B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 7 3.2.13 Slippage, max 10 mm Test Method: . Apply 2 parallel beads (approx. 12 g in total; triangle form, 9 mm base and 13 mm height) of material under test to a 125
22、 x 75 x 4 mm primed float glass specimen and check for correct weight of applied bead of adhesive For application temperature of material under test see Engineering Material specification. 2 min after application assemble with a 200 x 200 primed glass plate to a bead thickness of 4mm and fix in that
23、 position for 10 s. Remove distance spacers and turn assembly to vertical position and fix one glass plate, add a weight to lower glass specimen to a total weight force of 8 N and measure the slippage after 2 h. Record all details of measurements and material under test. 3.3 CURE RATE PROPERTIES 3.3
24、.1 Tack Free A 150 mm long and 6 mm diameter bead shall be tack free in 30 minutes max and cured after 72 h at 23 +/- 2 C, 50% +/- 5% R.H. Apply beads of adhesive to a clean float glass panel. Touch the bead gently using a cotton swab for tack free test. Cut the bead using a sharp razor blade for cu
25、ring test. 3.3.2 Sandwich Tensile Pull Strength Versus Cure Time, min Cure Time Sandwich Tensile Pull Strength 1.5 hours 200 kPa 3.0 hours 400 kPa 6.0 hours 1.2 MPa 24.0 hours 2.5 MPa 72.0 hours 2.5 MPa Test Method: Sandwich Tensile Pull Strength . Prepare a minimum of 3 sandwich assemblies for each
26、 cure time tensile pull strength test as per Figure 1. . Brush apply glass primer wipe onto float glass substrate in area where adhesive is to be applied. Allow primer to air dry. Condition primer at R.T. for 5 minutes min, check the process standard for the max open time. . Apply a 50 mm long by 6.
27、4 mm diameter bead of adhesive to the primed glass, as illustrated in Figure 2. Within 5 minutes after adhesive application, position the adhesive on the glass coupon in contact with the painted metal surface (electrocoated panel may also be used). Maintain a 5 mm nominal adhesive bondline thickness
28、. . Condition assemblies same at R.T. for various cure times as indicated above. . Determine the adhesion in a tensile machine having a jaw separation rate of 25 mm/minutes. Report strength value and mode of failure. . See para 4.1, 4.2, 4.3 ENGINEERING MATERIAL SPECIFICATION WSS-M2G316-B4 Printed c
29、opies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 5 of 7 3.4 CURED ADHESIVE PROPERTIES 3.4.1 Flexibility (ASTM F 147, except condition at 150 mm long x 25 mm wide x 2.5 mm thick sample for 120 h at R.T., and then 4 h at the following temperatures) . 23 +/- 2 C No crack on 3 m
30、m mandrel . -29 +/- 1 C No crack on 25 mm mandrel 3.4.2 Hardness, Durometer “A“ 65 +/- 10 Points Test Method: Flow enough material into a container (such as an ointment tin) to give a cured section 5 mm thick. Cure for 168 h at R.T. and check the instantaneous hardness. 3.4.3 Tensile Properties (AST
31、M D 412, except where noted, use Type C die and pull at 50 cm/minute, cure on release paper between 3 mm aluminum panels for 7 days at 23 +/- 2 C and 50 +/- 5% relative humidity or as recommended by the material manufacturer to achieve full cure. Condition at 23 +/- 2 C for 24 h, report at 23 +/- 2
32、C, use extensometer or strain gage, test at -40, 23, 50 and 80 +/- 2 C) Tensile at break, min 6.9 MPa Tensile Modulus 4 - 7 MPa Elongation at break, min 200% Poissons Ratio 0.25 - 0.50 Modulus of elasticity (ASTM D 4065 or equiv. 25 35 MPa Report the value at 23 +/- 2 C, and 1 Hz (Dynamic Mechanical
33、 Analyzer tensile compression mode) Frequency Sweep 0.1 to 100 Hz, fixed stress of 0.5% at 23 +/- 2 C. Temperature Sweep: -40 C to 100 C, set heating rate to 2 C/min; fixed strain of 0.5% at 1 Hz frequency. 3.5 CURED MATERIAL PERFORMANCE PROPERTIES Parts and/or test samples prepared with materials a
34、ccording to these specifications shall meet all requirements of performance specifications WSS-M11P57-A5. ENGINEERING MATERIAL SPECIFICATION WSS-M2G316-B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 6 of 7 3.6 LINE TRIAL The Requirements defined in this specifi
35、cation are based upon laboratory coupon testing and define the minimum acceptance criteria for adhesive performance. Prior to use, the adhesive must be evaluated under the production parameters of the relevant production line. The choice of substrates, plant processing conditions and specific design
36、 application may affect adhesive performance. Compliance with this specification does not guarantee the adhesive will function for all potential applications on a vehicle. Therefore materials being evaluated for approval to this specification shall be subjected to a production trial. Functional tria
37、l results must be approved by the affected assembly operation. Results shall be made available to Materials Engineering prior to material approval and release. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specific
38、ation. 4.1 RELATED MATERIALS AND PROCEDURE 4.1.1 Glass Primer Wipe WSS-M5B280-C4 4.2 SUBSTRATES 4.2.1 Metal Substrate: Prior to releasing to this specification, the adhesive must be tested to painted steel panels of nominal thickness 0.80 mm. The substrate must be painted with all of the production
39、paint systems that are currently being used by the assembly plant. 4.2.2 Float Glass: 5.6 mm nominal thickness. 4.2.3 Float Glass with WSS-M99P6-C1/C2 Ceramic Coating: 4.3 WEIGHT PER VOLUME, Typical 1.15 - 1.30 kg/L (Refer to para 3.2.5) ENGINEERING MATERIAL SPECIFICATION WSS-M2G316-B4 Printed copie
40、s are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 7 of 7 Figure 1 5.0 SUMMARY OF REVISIONS 2008 12 09 1. Updated 2.1 and deleted Table 1. 2 Changed 3.2.1 from Rheology to Viscosity, test method added 3. Revised Storage Stability. 4. Added 3.5 Cured Material Performance Properties
41、. 5. Revised 4.1 6. Added FLTM to 3.2.3 Solid and 3.2.4 Ash 7. Updated 3.2.9 Odor and 3.2.10 Fogging 8. Added tests 3.2.13 Slippage 9 Deleted 3.4.2 Tear Strength 10. Change 4.5 Weight per Volume to Density 11. Updated 3.3.2 Cure rate Properties. 12. Updated Tensile Properties 13. Added 3.6 Line Trial. 14. Deleted 4.2 Restrictions Top View Side View 6.4 mm 150 mm 5 mm Thick Glass 50 mm x 6.4 mm Bond Area 5 mm thick Metal50 mm
