1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No Release/Revisions1985 01 07 Released CZ01-CR527860 ERRWP 3948-a Page 1 of 6SEALER, BUTYL RUBBER BASE - ELASTOMERIC - HOT APPLIED ESB-M4G266-A1. SCOPE:The material defined by this specification is a hot applied, buty
2、l rubberbased, elastomeric sealant with flow resistant properties.2. APPLICATION:This specification was released originally for material used to seal taillamp lenses to body housings, in conjunction with mechanical fasteners.Lens materials are acrylic and polycarbonate and h are ABS, FRP or zincdie
3、cast. The sealer is designed for application at 88 - 100 C.3. REQUIREMENTS:3.1 CONDITIONINGAll test values indicated herein are based on material conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relativehumidity for 24 h prior to testing and tested under the sameconditions.3.2 INFRA
4、RED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared analysis ofmaterials/parts supplied to this specification. The spectraestablished for initial approval shall constitute the referencedstandard and shall be kept on file at Ford. All samples shallprod
5、uce spectrographs that correspond to the reference standardwhen tested under the same conditions as those specified on themaster spectra.3.3 PHYSICAL CHARACTERISTICS3.3.1 Color Black or as specified on theengineering drawing3.3.2 Solids, min 99.0%(ASTM D 2834 except heat for 3 hat 102 +/- 3 C in a m
6、echanical convectionoven. Save sample for next test)3.3.3 Ash Content, max 50%The tolerance for any one supplier shall be +/- 0.2% basedon the results obtained from his original approvedproduction sample.ENGINEERING MATERIAL SPECIFICATIONESB-M4G266-AWP 3948-b Page 2 of 6Test Method: Place the crucib
7、le containing the solidsresidue in a cool muffle furnace. Slowly heat to andmaintain at 760 +/- 10 C for 1 h. Cool in a desiccator andweigh.3.3.4 Specific Gravity 1.3 +/- 0.2(ASTM D 297, hydrostatic method)3.3.5 Needle Penetration(ASTM D 1321, D5 needle)150 g needle 5.5 - 8.5 mm3.3.6 Viscosity 150,0
8、00 - 200,000 mPa.s(Brookfield thermosel, SC4-29spindle, 2.5 rpm, 177 +/- 1 C)3.3.7 Ring and Ball Softening Point 102 - 108 C3.4 PERFORMANCE REQUIREMENTS3.4.1 Migration Stain No migration stainTest Method: A 4-6 mm bead, 100 mm in length, is appliedto the face of a 125 x 125 mm piece of acrylic andpo
9、lycarbonate lens material. These assemblies shall beexposed in a fluorescent sunlamp cabinet as described inFLTM BO 15-1 for 200 h. A SIGMA dry UV cabinet may also beused.3.4.2 Paint CompatibilityThere shall be no evidence of migration stain, pinholing,blistering, or softening of the paint film.Test
10、 Method: A 4-6 mm bead, 100 mm in length, shall beapplied to 125 x 125 mm ABS panels untreated, painted withESB-M2P80 paint, and vacuum metallized. Expose theassemblies to 88 C for 2 weeks. Remove the sealer from thepanels and examine the surface directly beneath andadjacent to the contact area.3.4.
11、3 Low Temperature Flexibility No crackingTest Method: Apply the sealer as a 4-6 mm bead, 150 mmlong to a suitable release liner. Condition one bead for 2weeks at 88 C and another bead for 2 weeks at 88 C followedby one week at -29 C. After exposure to the temperatures,above, condition the beads at -
12、29 C for 4 h, and bend 180 around a -29 C conditioned mandrel with a 25 mmdiameter.ENGINEERING MATERIAL SPECIFICATIONESB-M4G266-AWP 3948-b Page 3 of 63.4.4 Shear, Strength, min3.4.4.1 Normal 55 kPa(24 h at 23 C)3.4.4.2 Heat Aged 69 kPa(2 weeks at 88 C)3.4.4.3 Humidity 55 kPa(500 h at 38 C/100%relati
13、ve humidity)3.4.4.4 Ultraviolet 69 kPa(500 h in a fluorescentsunlamp cabinet describedin FLTM BO 15-1, or in aSIGMA dry UV cabinet)3.4.4.5 Environmental Cycling 69 kPaTest after one and two cycles of:4 h at 88 C, 4 h at 38 C/100% RH, 16 h at -29 C,4 h at 38 C/100% RH, 4 h at 88 C, 16 h at -29 C.Cond
14、ition for 4 h at 23 C before testing.Test Method: Prepare assemblies as shown in Fig.1 by applying the sealer to the housing substrate(ABS, FRP, Zinc die cast). Place 3.1 mm spacersas shown. Sixty sealer cover with the lenssubstrates (acrylic or polycarbonate) andcompress by hand until the substrate
15、s are seatedagainst the spacers. Hold compression for 15 sat room temperature, then condition as specified.Upon removal from the test environment, allow tocondition for 4 h at 23 C. Then determine theshear strength by pulling in shear at aseparation rate of 50 mm per minute.Prepare three laminations
16、 per test percombination of substrates. Each of the housingsubstrates must be tested on plain, paintedaluminum, painted black, and vacuum metallized.(Except zinc die cast painted black). Shallowcohesive failure is permitted.3.4.5 Insertion Force, max 60 NTest Method: Condition the sealer to 121 +/-
17、1 C tofacilitate pouring, and apply into a 9 mm wide by 9 mm deepby 120 mm long stainless steel channel. The sealer shouldbe leveled with the top of the channel. Condition for 24 hat 23 +/- 2 C. Mount as shown in Fig. 2 in a tensilemachine, and insert a 1.0 mm thick by 100 mm long steelpanel into th
18、e material at a rate of 5 mm/minute. Theforce to insert shall be the force, in Newtons, at 3 mm ofblade travel into the sealer.ENGINEERING MATERIAL SPECIFICATIONESB-M4G266-AWP 3948-b Page 4 of 63.4.6 Sag Resistance No sagging or flowingTest Method: Apply an “L“ shaped bead 4-6 mm in diameteras shown
19、 in Fig. 3 to two 125 x 125 mm ABS plaques.Immediately fixture the plaques in a vertical position andcondition for 24 h at 23 +/- 2 C. Then fixture one plaquein a vertical position and one in an inverted position, andcondition at 88 +/- 1 C for 2 weeks.Some deformation of the bead shape is allowed,
20、but it shallnot run, drip, or sag.3.5 FUNCTIONAL APPROVALMaterial being evaluated for initial approval to the specificationshall be subjected to a production trial in an area intended foruse. This trial will be conducted after all other specificationrequirements have been met including laboratory ev
21、aluation andengineering approval for the trial. Material must meet the designengineering specification requirements also.3.6 STORAGE STABILITYAs shipped, the material in the unopened container must have ashelf life of 6 months minimum when stored between 4 C to 35 C. Thematerial in an open container
22、 must be protected from contamination.Must be free from foreign materials and must be a homogeneousmixture.3.7 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally granted.Prior to making any c
23、hanges in the properties, composition,construction, color, processing or labelling of the materialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology andthe affec
24、ted Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, test samples and a new code identificationare to be submitted with the request.Substance restrictions imposed by law, regulations or Ford apply tothe materials a
25、ddressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1,unless a different suffix (e.g., A2 or A3) is specified on theengineering document for the application.4. APPROVAL OF MATERIALS:Materials defined by this specification must have prior approva
26、l by theresponsible Materials Engineering activity. Suppliers desiring approvalof their materials shall first obtain an expression of interest from theaffected Purchasing, Design and Materials Engineering activity. Uponapproval, the material will be added to the Engineering Material ApprovedSource L
27、ist.ENGINEERING MATERIAL SPECIFICATIONESB-M4G266-AWP 3948-b Page 5 of 65. GENERAL INFORMATION:The material data included herein is for information and initial approvalonly.5.1 MATERIALS TESTEDShear adhesion ( para 3.4.4) was tested on the following lensmaterials: acrylic (ESF- M4D9-A) and polycarbonate (ESB-M4D100A2/A3); and housing materials: ABS (ESB- M4D236-A), FRP(ESB-M3D101-A) or zinc die cast (SAE 903 or SAE 925) combinations.Paints per ESB-M2P7-A, ESB-M2P80-A and ESF-M5P1-A specifications.ENGINEERING MATERIAL SPECIFICATIONESB-M4G266-AWP 3948-b Page 6 of 6
