1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 01 10 Activated W. Scholz Printed copies are uncontrolled Page 1 of 6 Copyright 2002, Ford Global Technologies, Inc. SEALER, POLYURETHANE, SOLVENT RELEASE, AIR DRYING, WSK-M4G245-B3 HIGH TEMPERATURE STO
2、RAGE STABILITY 1. SCOPE The material defined by this specification is a solvent release one component sealer based on polyurethane. It cures at room temperature in the presence of moisture. 2. APPLICATION This specification was released originally for dealer repair shops for the repair of interior a
3、nd exterior body joint seams. The material is to be applied to dry, grease free and primed surfaces. After application condition for at least 5 h at 23 +/- 2 C and 50 +/- 5 % relative humidity (based on an application thickness of max 3 mm) prior to painting. 3. REQUIREMENTS Note: Unless otherwise s
4、pecified use: a) EC-coated test panels according to FLTM BI 120-01, Method C and b) Test panels prepared according to FLTM BI 103-02, Method Bb, except only EC-coated and spray primer. Material specification requirements are to be used for initial qualification of materials. 3.1 QUALITY SYSTEM REQUI
5、REMENTS Material suppliers and part producers must conform to the Companys Quality System Requirements. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designat
6、ed material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSK-M4G245-B3 Page 2 of 6 Copyright 2002, Ford Global Technologies, Inc. 3.3 CONDITIONING AND TEST CONDITIO
7、NS 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 otherwise specified. 3.4 FLASH POINT Above 25 C (ASTM D 56) 3.5 COLOR Wh
8、ite or as specified on Engineering Drawing 3.6 SOLIDS, min 82 % (FLTM BV 150-10) 3.7 ASH, max 14 % (FLTM BV 150-10) 3.8 DENSITY AT 20 C 1.15 - 1.25 kg/L (ASTM D 1475) 3.9 VISCOSITY AT 20 C (FLTM BV 103-01, nozzle 2 mm diameter, pressure 2.8 bar) 3.9.1 As Received 80 - 120 s 3.9.2 After Aging, max 14
9、0 s (WSK-M4G245-B: 336 h at 30 +/- 2 C) (WSK-M4G245-B3: 336 h at 40 +/- 2 C) 3.10 FLOW RATE AT 23 +/- 2 C No sagging (FLTM BV 153-01, Method A) Test specimen prepared according to para 3. Test 1 h after material application. ENGINEERING MATERIAL SPECIFICATION WSK-M4G245-B3 Page 3 of 6 Copyright 2002
10、, Ford Global Technologies, Inc. 3.11 COLD FLEXIBILITY AFTER AGING No cracking, no loss of adhesion, no chipping or blistering. Test Method: . Apply 280 x 30 x 2 mm ribbons of material under test to 300 x 100 x 0.8 - 0.9 mm test panels prepared according to para 3. . Expose test specimens after 24 h
11、 at 23 +/- 2 C in a mechanically convected air dry oven at 70 +/- 2 C for 120 h. . After cooling to RT expose test assemblies and bending fixture (see FLTM BV 153-04, except 100 mm mandrel) in a cold box at - 40 +/- 2 C for 4 h. . While still in the cold box bend test assemblies within 2 s around th
12、e 100 mm mandrel through an angle of 90 deg. 3.12 ENVIRONMENTAL CYCLING TEST AFTER AGING No cracking, no separation from substrate. Test Method: . Prepare test specimens according to para 3.11, section 1 and 2 of test method. . After 24 h at 23 +/- 2 C the test specimens shall be subjected three tim
13、es to the following cycle: 16 h at 98 +/- 2 % RH and 38 +/- 2 C 4 h at - 40 +/- 2 C 4 h at 80 +/- 2 C . Evaluation according to FLTM BV 153-03, mandrel diameter 100 mm, angle of 90 deg within 2 s. ENGINEERING MATERIAL SPECIFICATION WSK-M4G245-B3 Page 4 of 6 Copyright 2002, Ford Global Technologies,
14、Inc. 3.13 PAINTABILITY No staining, discoloration or other deleterious effects on the paint after exposure to each of the following exposures: a. Fluorescent Sunlamp, min 500 h (FLTM BU 152-02) b. Florida Exposure, min 12 months (5 deg facing south, Miami, Florida) Specimen Preparation: . Apply 280
15、x 30 x 3 mm ribbons of sealer under test to 300 x 100 x 0.8 - 0.9 mm test panels prepared according to FLTM BI 120-01, Method C and FLTM BI 103-02, Method B. . Condition for at least 5 h at room temperature and paint using approved/released repair paint systems. . Condition for 24 h at room temperat
16、ure and expose as specified under items a and b above. 3.14 BRIDGING The material shall bridge a distance of 4 mm. The sagging height shall not exceed 3 mm. . Apply a bead of material under test, 5 mm in diameter to a test fixture as outlined in FLTM BV 153-05 (treated in accordance with FLTM BI 103
17、-2, Method C, EC-coated) and conditioned for 24 h at 23 +/- 2 C. . Dismantle the test assembly and measure the sagging height in mm. 3.15 WATER ABSORPTION, max 2 % (FLTM BV 153-07 substitute heat treatment by 48 h at RT) ENGINEERING MATERIAL SPECIFICATION WSK-M4G245-B3 Page 5 of 6 Copyright 2002, Fo
18、rd Global Technologies, Inc. 3.16 SHEAR STRENGTH AT 23 +/- 2 C, min 0.5 MPa (FLTM BV 154-03, Method B) . Prepare specimen in accordance with section 2, coating thickness x = 2 mm. . Substitute heat treatment by 48 h at 23 +/- 2 C) 3.17 PEEL STRENGTH AT 23 +/- 2 C, min 40.0 N/cm (FLTM BV 154-03, Meth
19、od C) . Prepare specimen according to section 2, coating thickness x = 2 mm. . Substitute heat treatment by 48 h at 23 +/- 2 C) 3.18 STORAGE STABILITY, min WSK-M4G245-B: 6 months (From date of receipt at WSK-M4G245-B3: 3 months Ford Motor Company) B: When stored in sealed unopened containers out of
20、direct sunlight at ambient temperatures between 5 C and 32 C. B3: When stored in sealed unopened containers out of direct sunlight at ambient temperature of 40 C. 3.19 QUALITY The material shall be of uniform quality free from foreign material and properties detrimental to normal production use. It
21、shall not cause excessive soiling when handled in normal production use. 3.20 ADDITIONAL REQUIREMENTS Additional requirements for material and/or manufactured parts may be specified on the Engineering drawing, Engineering parts specification, performance specification, System Design Specification (S
22、DS) and/or Component Design Specification (CDS). ENGINEERING MATERIAL SPECIFICATION WSK-M4G245-B3 Page 6 of 6 Copyright 2002, Ford Global Technologies, Inc. 3.21 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which
23、 approval was originally granted. Prior to making any changes to the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify the affected Purchasing, and Materials Engineering ac
24、tivities (with reasons) of the proposed changes. Upon notification of the Company, further instructions will be provided. Note: Suppliers should be prepared to provide test data and samples demonstrating compliance to this specification, if requested. Substance restrictions imposed by regulations or
25、 Company direction applies to the materials addressed by this document. The restrictions are identified in Restricted Substance Management Standard WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification for direct supply to the Company must have prior approval. Certain mat
26、erials subcontracted by part suppliers may also require prior approval. These include materials critical to the Companys business for regulatory, safety, environmental or compatibility requirements or contractual agreements. Suppliers desiring approval of their materials shall first obtain an expres
27、sion of interest from Purchasing, Design or Materials Engineering activity. Upon request, 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 this specification.
