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    FORD WSF-M99G165-A-1992 ENCAPSULANT SILICONE GEL ONE COMPONENT PLATINUM CURE《单组分铂固化的硅树脂凝胶封闭剂》.pdf

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    FORD WSF-M99G165-A-1992 ENCAPSULANT SILICONE GEL ONE COMPONENT PLATINUM CURE《单组分铂固化的硅树脂凝胶封闭剂》.pdf

    1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision92 04 16 DF00E10022660211 Released J. KellyWP 3948-a Page 1 of 4 ENCAPSULANT, SILICONE GEL, ONE COMPONENT WSF-M99G165-APLATINUM CURE1. SCOPEThe material defined by this specification is an inhibited

    2、, platinumcatalyzed, hydrosilation curing, dimethyl siloxane gel.2. APPLICATIONThis specification was released originally for material used as adielectric potting gel for use in potting hybrid ignition modules.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford

    3、Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/

    4、OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated mate

    5、rial laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50

    6、 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATIONWSF-M99G165-AWP 3948-b Page 2 of 4 3.4 COMPOSITIONThe dielectric gel shal l consist primarily of linear, vinyl terminalpo lydimethylsilox

    7、ane polymer and a methyl hydrogen functionalpolysi loxane crosslinker. The vinyl functional polymer will bepresent in stoichiometric excess compared to the Si-H in the methylhydrogen functional crosslinker. A catalyst con sisting of a platinumgroup m etal/inhibitor complex is used to provide the des

    8、ired cureresponse.3.5 COMPATIBILITYMutual compatibility of materials approved to this specification isrequire d with respect to miscibility and completeness of cure.Mutual compatibility will be established by Ford laboratory testingprior to source approval.3.6 VISCOSITY 350 - 900 mPa.s(ASTM D 1084,

    9、Brookfield model LVF,#3 spindle)3.7 SPECIFIC GRAVITY 0.96 - 1.03.8 CURE TIME, max 15 minutesThe cure time is determined using Differential Scanning Calorimetryin conjunction with the method detailed below:(1) A 0.015 gram sample is first he ated and allowed to stabilize at55 C.(2) Sample is h eated

    10、at the rate of 4.0 C per minute until itattains 110 C.(3) Sample is held at 110 C until a cure exotherm is observed. Thecure time is recorded as elapse d time from beginning of ramp-upuntil the onset of the cure exotherm is observed.3.9 ACCELERATED SHELF LIFE, min 3 daysSample s are maintained at a

    11、constant 50 C in closed glass jars. Thehead space in the jars is to be 25 % or more of the tota l volume. Theviscosity is to be measured usi ng the method listed in para 3.6. Theshelf life is defined as the time required for viscosity to doublefrom initial value.3.10 PENETRATION HARDNESS 67 - 150 g(

    12、FLTM BJ 123-03)3.11 VOLUME RESISTIVITY, min 1.0E14 ohm.cm(ASTM D 257)3.12 DIELECTRIC STRENGTH, min 13.7 kV/mm(ASTM D 149)ENGINEERING MATERIAL SPECIFICATIONWSF-M99G165-AWP 3948-b Page 3 of 4 3.13 DIELECTRIC CONSTANT, max 2.9(ASTM D 150, tested at 1 Mhz and 1 khz)3.14 DISSIPATION FACTOR, max 0.001(AST

    13、M D 150, tested at 1 MHz and 1 kHz)3.15 SILICONE VOLATILES, max 5 %(FLTM AV 102-01)3.16 ADDITIONAL REQUIREMENTSSpecific requirements for mater ial and/or manufactured parts shall bespecified on the Engineering dr awing, Engineering parts specificationand/or performance specificatio ns. All critical

    14、areas with respect tothese p roperties shall be clearly designated on the engineeringdrawing.3.17 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equ ivalent in allchar acteristics to the material upon which approval was originallygranted.Prio r to making any change in t

    15、he properties, composition,construction, color, processing or labeling of the mater ial originallyapproved under this specificati on, whether or not such changes affectthe materials ability to meet the specification requirements, theSupplier shall notify Purchasing, Toxicology and the affectedMateri

    16、als Engineering activity of the proposed changes and obtain thewritten approval of the Materials Engineering activity. Test data,test sam ples and a new code identification are to be submitted withthe request.Substa nce restrictions imposed by law, regulations or Ford, apply toth e materials address

    17、ed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1, unlessa differ ent suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by t

    18、heresponsible Materials Engineeri ng activity. Suppliers desiring approval oftheir mat erials shall first obtain an expression of interest from theaffecte d Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringact ivity a

    19、completed copy of their laboratory test reports, signed by aqualified and authorized repres entative of the test facility, demonstratingfu ll compliance with all the requirements of this specification (testresults, not nominal values), t he material designation and code number, andtest spec imens fo

    20、r Ford evaluation. Fords engineering approval of amateria l will be based on its performance to this specification and on anassess ment of suitability for intended processes and/or applications. Uponapproval, the material will be added to the Engineering Material ApprovedSource List.ENGINEERING MATE

    21、RIAL SPECIFICATIONWSF-M99G165-AWP 3948-b Page 4 of 4 5. GENERAL INFORMATIONTh e information below is provided for clarification and assistance inmeeting the requirements of this specification.5.1 STORAGEStorag e temperature should be maintained at 35 C or less in order toattain 3 month shelf life. R

    22、ef rigerated transport and storage shouldbe employed if maintenance of this maximum temperature cannototherwise be assured.5.2 CURE INHIBITIONThe ma terials approved to this specification are susceptible to cureinhibi tion resulting from contact with certain types of chemicalco mpounds (amines, sulf

    23、ur containing compounds, tin containing andother organometallics). Functi onal testing of these materials in theproposed process is required to assure that inhibition d oes not occur.5.3 SURFACE APPEARANCEUnde r certain curing conditions, the surface of the gel may appearslig htly wrinkles or textured compared to similar plural componentgels.


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