1、PERFORMANCE SPECIFICATIONSEALING COMPOUND, SYNTHETIC RUBBER, ELECTRIC CONNECTORSAND ELECTRIC SYSTEMS, CHEMICALLY CUREDThis specification is approved for use by all Departmentsand Agencies of the Department of Defense.1. SCOPE1.1 Scope . This specification covers a two-component, chemically cured syn
2、thetic rubbercompound for insulating, sealing, reinforcing, and corrosion protection of electric connectors,wiring, and other electric apparatus. This specification has provisions for shelf-life extension(see 3.2.4).1.2 Classification . The sealing compound is furnished in the following types, class
3、es, andcategories (see 6.2).1.2.1 Types . The types of sealing compound are as follows:Type I - Low viscosity (100 to 400 poises, initial mixed viscosity)Type II - High viscosity (401 to 1,200 poises, initial mixed viscosity)1.2.2 Classes . The classes of sealing compound are as follows:Class 1 - 24
4、-hour cure at 77FClass 2 - 48-hour cure at 77FClass 3 - 72-hour cure at 77FAMSC N/A FSC 8030DISTRIBUTION STATEMENT A . Approved for public release; distribution is unlimited.NOT MEASUREMENTSENSITIVEMIL-PRF-8516G31 July 1997SUPERSEDINGMIL-S-8516F31 May 1992Beneficial comments (recommendations, additi
5、ons, deletions) and any pertinent data which may beof use in improving this document should be addressed to: Commander, Naval Air Warfare CenterAircraft Division, Code 414100B120-3, Highway 547, Lakehurst, NJ 08733-5100, by using theStandardization Document Improvement Proposal (DD Form 1426) appear
6、ing at the end of thisdocument or by letter.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-8516G21.2.3 Categories . The sealing compound is categorized as follows:Category A - Two-component kitCategory B - Premixed, degassed, frozen kit2. AP
7、PLICABLE DOCUMENTS2.1 General . The documents listed in this section are specified in sections 3 and 4 of thisspecification. This section does not include documents cited in other sections of thisspecification or recommended for additional information or as examples. While every effort hasbeen made
8、to ensure the completeness of this list, document users are cautioned that they mustmeet all specified requirements documents cited in sections 3 and 4 of this specification, whetheror not they are listed.2.2 Government documents .2.2.1 Specifications and standards . The following specifications and
9、 standards form a partof this document to the extent specified herein. Unless otherwise specified, the issues of thesedocuments are those listed in the issue of the Department of Defense Index of Specifications andStandards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2).SPECIFI
10、CATIONSFEDERALJ-C-30 - Cable and Wire, Electrical (Power, Fixed Installation).QQ-A-250/13 - Aluminum Alloy Alclad 7075, Plate and Sheet.QQ-P-416 - Plating, Cadmium (Electrodeposited).TT-I-735 - Isopropyl Alcohol.TT-S-735 - Standard Test Fluids, Hydrocarbon.CCC-C-419 - Cloth, Duck, Unbleached, Plied-
11、Yarns, Army and Numbered.DEPARTMENT OF DEFENSEMIL-P-5315 - Packing, Preformed, Hydrocarbon Fuel Resistant.MIL-H-5606 - Hydraulic Fluid, Petroleum Base, Aircraft, Missile and Ordnance.MIL-PRF-5624 - Turbine Fuel, Aviation, Grades JP-4, JP-5, and JP-5/JP-8 ST.MIL-PRF -7808 - Lubricating Oil, Aircraft
12、Turbine Engine, Synthetic Base.MIL-S-8660 - Silicone Compound, NATO Code Number S-736.MIL-W-22759/9 - Wire, Electrical, Fluoropolymer-Insulated, Extruded TFE, Silver-Coated Copper Conductor, 1000-Volt.MIL-PRF-23699 - Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATOCode Number 0-156.Pro
13、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-8516G3MIL-S-38714 - Sealant Cartridge for Two-Component Materials.MIL-C-38736 - Cleaning Compound, Solvent Mixtures.STANDARDSDEPARTMENT OF DEFENSEMS3100 - Connector, Receptacle, Electric, Wall Moun
14、ting, Solder Contacts,AN Type.MS3103 - Connector, Receptacle, Electric, Potting Seal, Solder Contacts,AN Type.MS3106 - Connector, Plug, Electric, Straight, Solder Contacts, AN Type.MS25183 - Connector, Plug, Electric, Potting Seal, Solder Contacts, AN Type.(Unless otherwise indicated, copies of the
15、above specifications and standards are availablefrom the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D,Philadelphia, PA 19111-5094.)2.3 Non-Government publications . The following documents form a part of this documentto the extent specified herein. Unless otherwise specified,
16、 the issues of the documents which areDoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unlessotherwise specified, the issues of the documents not listed in the DoDISS are the issues of thedocuments cited in the solicitation (see 6.2).AMERICAN SOCIETY FOR TESTING AND
17、 MATERIALS (ASTM)ASTM-D149 - Dielectric Br eakdown Voltage and Dielectric Strength of SolidElectrical Insulating Materials of Commercial Power Frequencies,Standard Test Method for (DoD adopted)ASTM-D150 - A-C Loss Characteristics and Permittivity (Dielectric Constant) ofSolid Electrical Insulating M
18、aterial, Standard Test Method for(DoD adopted)ASTM-D257 - Materials, Insulating, D-C Resistance or Conductance of, StandardTest Method for (DoD adopted)ASTM-D495 - High-Voltage, Low-Current, Arc Resistance of Solid ElectricalInsulation, Standard Test Method for (DoD adopted)ASTM-D1141 - Substitute O
19、cean Water, Standard Specification for (DoD adopted)ASTM-D1457 - Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials,Standard Specification for (DoD adopted)ASTM-D2240 - Rubber Property - Durometer Hardness, Standard Test Method for(DoD adopted)ASTM-D4066 - Nylon Injection and Extrusion M
20、aterials, Standard Specification for(DoD adopted)Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-8516G4ASTM-D5948 - Compounds, Molding, Thermosetting, Standard Specification for(DoD adopted)(Application for copies should be addressed to the A
21、merican Society for Testing andMaterials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.)2.4 Order of precedence . In the event of a conflict between the text of this document andthe references cited herein, the text of this document takes precedence. Nothing in thisdocument, however, supe
22、rsedes applicable laws and regulations unless a specific exemption hasbeen obtained.3. REQUIREMENTS3.1 Qualification . The sealing compound furnished under this specification shall be aproduct that is authorized by the qualifying activity for listing on the applicable QualifiedProducts List (QPL) be
23、fore contract award (see 4.3 and 6.3).3.2 Material . The sealing compound shall consist of a synthetic rubber base compound anda curing agent supplied as a kit (see 3.2.2). Each component shall be homogeneous and free oflumps and foreign matter. The sealing compound shall not contain elemental sulfu
24、r (see 4.3.2).3.2.1 Primer . The use of a primer to promote adhesion is permitted. The primer shall berecommended by the manufacturer and shall be included in the tests of this specification. Theprimer shall be identified on the applicable QPL. The use and application of a primer shall be inaccordan
25、ce with the manufacturers instructions.3.2.2 Kit categories . The category A sealing compound shall be furnished as atwo -component kit. Category B sealing compound shall be furnished as a premixed, degassed,frozen kit.Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
26、nse from IHS-,-,-MIL-PRF-8516G53 .2.2.1 Unit of issue . To interface with existing equipment and meet the required storagecharacteristics, the unit of issue for each category of sealing compound kit shall be as follows:Unit of issue(kit) identifier Unit of issue Category 1 /1 1 gallon A2 1/2 gallon
27、A3 1 quart A4 1/2 pint A5 6 fluid ounces A6 2-1/2 fluid ounces A7 12-fluid ounce frozen cartridge B8 6-fluid ounce frozen cartridge B9 2-1/2-fluid ounce frozen cartridge B1 / The ratio of the quantity contained in the base compound container to the quantity containedin the accompanying curing agent
28、container for category A shall be the same as themanufacturers recommended mixing ratio of the base compound and curing agent.3.2.2.1.1 Kits 1, 2, 3, and 4 . The base compound and the curing agent shall be packaged inindividual containers. The base compound shall be furnished in 1/2-pint, 1-quart, 1
29、/2-gallon, or1 -gallon multiple friction top, metal containers filled to 75 percent by volume. The requiredamount of curing agent shall be furnished in either glass or plastic jars having smooth, verticalinside walls with screw caps (to facilitate removal of the curing agent). Each curing agentconta
30、iner shall be packaged with each base compound container with a divider between the twoin a manner that prevents them from coming apart but permits their separation for mixingpurposes.3.2.2.1.2 Kits 5 and 6 . The base compound and curing agent shall be furnished insectional -type 2-1/2- or 6-fluid o
31、unce nonmetal containers , conforming to type I or II ofMIL -S -38714, as specified by the procuring activity. The total amount of base compound andcuring agent in each container shall be as follows:Container Size Base Compound and Curing Agent Volume Tolerance6 fluid ounces 3-1/2 fluid ounces 1/8 f
32、luid ounce2-1/2 fluid ounces 2 fluid ounces 1/8 fluid ounce3.2.2.1.3 Kits 7, 8, and 9 . The premixed, degassed, frozen sealing compound and curingagent shall be supplied in 2-1/2-, 6-, or 12-fluid ounce nonmetal containers conforming toMIL -S -38714.3.2.2.2 Marking of component containers . In addit
33、ion to the markings required by thecontracting officer, all component containers shall be marked with the date of manufacture andthe date of packaging.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-8516G63.2.3 Toxicity . The sealing compound
34、, when used for its intended purpose, shall have noadverse effect on the health of personnel.3.2.4 Shelf life . The shelf life of the sealing compound shall be not less than 9 months.Sealing compound which has exceeded its shelf life may be retested to extend storage (see 6.5).3.3 Performance charac
35、teristics .3.3.1 Properties before cure .3.3.1.1 Color . Unless otherwise specified in the contract or order, the base compound shallbe supplied in the manufactured color and shall contrast with the curing agent to facilitate mixing(see 6.2). The material shall not be red in color.3.3.1.2 Consistenc
36、y during electrical connector sealing (potting) operations . The mixedsealing compound shall be pourable at normal temperatures, but shall not flow throughconnectors during electrical connector sealing (potting) operations (see 4.6.1.3).3.3.1.3 Application life . When tested in accordance with 4.9.2
37、.1, the mixed category Asealing compound shall meet the requirements of initial viscosity (see 3.3.1.3.1) and applicationtime (see 3.3.1.3.2).3.3.1.3.1 Initial viscosity . The initial viscosity of the mixed compound shall be:Type Initial viscosityI 100 to 400 poisesII 401 to 1,200 poises3.3.1.3.2 Ap
38、plication time . The application time (minimum time to reach 1,000 poises fortype I and 2,500 poises for type II) of the mixed compound shall be:Class Minimumtime1 30 minutes2 60 minutes3 120 minutes3.3.1.4 Nonvolatile content . When tested in accordance with 4.9.2.2, the nonvolatilecontent of the m
39、ixed sealing compound shall be not less than 94 percent.3.3.1.5 Accelerated storage . When tested in accordance with 4.9.2.11, the mixed compoundshall not deviate from the initial viscosity (see 3.3.1.3.1) by more than plus 35, minus 5 percentProvided by IHSNot for ResaleNo reproduction or networkin
40、g permitted without license from IHS-,-,-MIL-PRF-8516G7and shall meet the application time requirements (see 3.3.1.3.2), the set time requirements (seetable I), and cure A hardness requirements (see table I).3.3.1.6 Long-term storage . When tested in accordance with 4.9.2.12, the mixed category Asea
41、ling compound shall meet the requirements of application life (see 3.3.1.3) and cure A and Bhardness (see table I).3.3.2 Properties after cure . Unless otherwise specified in the test method, all test specimensshall be cured as specified in 4.7.3.3.2.1 Nonelectric properties . The nonelectric proper
42、ties of the cured sealing compoundshall be as specified in table I.TABLE I. Nonelectric properties of cured compound .Property Requirement 1 / TestCure A (4.7.1) Cure B (4.7.2) paragraphSet time No sag or flow No sag or flow 4.9.2.3Shrinkage, percent, maximum 10 10 4.9.2.4Hardness, Shore A-2 initial
43、,pointsType I - 20, minimumType II - 25, minimumType I - 30 to 60Type II - 30 to 604.9.2.5Adhesion, (piw), minimum 4.9.2.6Aluminum alloy 2 15Chromated cadmium plated steel 2 15Diallyl phthalate plastic 15Nylon plastic 2 15Polytetrafluoroethylene (PTFE),treated2 Fluid resistance 4.9.2.7Adhesion after
44、 immersion,pounds, minimum 10Change in hardness, points,maximum 10Low temperature flexibility No checking, cracking, orseparation from test panel4.9.2.8Corrosion No greater corrosion thancontrol wire 4.9.2.9Hydrolytic stability, physical +15 4.9.2.10Change in hardness afterexposure, points51 / Unles
45、s otherwise specified, the given value is for all types and classes. “ “ indicates norequirement.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-8516G83.3.2.2 Electric properties . The electric properties of the cured sealing compound shall b
46、eas specified in table II.TABLE II. Electric properties of cured compound .Property Requirement 3 / TestCure A (4.7.1) Cure B (4.7.2) paragraphArc resistance, seconds, minimum 1 / 25 50 4.9.3.1Dielectric strength, volts/mil, minimum 200 200 4.9.3.2Dielectric constant, maximum 4.9.3.31 kHz at 77F (25
47、C) 9.5 9.51 MHz at 77F (25C) 9.5 9.5l kHz at 185F (85C) 9.0l MHz at 185F (85C) 9.0Dissipation factor, maximum 4.9.3.31 kHz at 77F (25C) 0.03 0.011 MHz at 77F (25C) 0.03 0.031 kHz at 185F (85C)Type IType II0.0900.030l MHz at 185F (85C)Type IType II0.0950.030Resistivity, minimum 4.9.3.4Volume at 77F (
48、25C), ohm-cm 1 10 10 1 10 10Surface at 77F (25C), ohm 1 10 11 1 10 11Volume at 185F (85C), ohm-cmType IType II5 10 92 10 10Surface at 185F (85C), ohm 2 10 11Insulation resistance, megohm, minimum,as received 2 /4.9.3.5Plastic inserts 4,000 10,000Resilient inserts 4,000 8,000Insulation resistance, me
49、gohm, minimum,after thermal shock4.9.3.6Plastic inserts 10,000Resilient inserts 8,000Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-8516G9TABLE II. Electric properties of cured compound - Continued.Property Requirement 3 / TestCure A (4.7.1) Cure B (4.7.2) paragraphInsulation resistance, megohm, min
