ASTM_D_6411_-_D_6411M_-_99_2012.pdf

Designation:D6411/D6411M99(Reapproved 2012)Standard Specification ForSilicone Rubber Room Temperature Vulcanizing LowOutgassing Materials1This standard is issued under the fixed designation D6411/D6411M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The specification covers a two-part flowable space graderoom temperature vulcanizing(RTV)silicone rubber adhesiveor compound.The material is specifically designed for appli-cations requiring extreme low temperature,low outgassing andminimal volatile condensibles under extreme operating condi-tions.The RTV silicone rubber should be suitable for with-standing environmental exposure to temperatures from 115 to200C(175 to 392F).The material should also withstand thecombination of stress,temperature,and relative humidityexpected to be encountered in service.The RTV silicone rubbermay be used as a sealing,caulking,potting or bonding materialfor applications on metal,plastics,rubber,glass,and ceramicproducts.Types I and II are often used as coatings.1.2 The values stated in SI units or inch-pound units are tobe regarded separately as standard.Within the text,theinch-pound units are shown in brackets.The values stated ineach system are not exact equivalents;therefore,each systemmust be used independently of the other.Combining valuesfrom the two systems may result in nonconformance with thisspecification.1.3 The following precautionary statement refers to the testmethod portion only,Section 8,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2B209 Specification for Aluminum and Aluminum-AlloySheet and PlateD149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD150 Test Methods for AC Loss Characteristics and Permit-tivity(Dielectric Constant)of Solid Electrical InsulationD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD907 Terminology of AdhesivesD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading(Metal-to-Metal)D1084 Test Methods for Viscosity of AdhesivesD2240 Test Method for Rubber PropertyDurometer Hard-nessD2651 Guide for Preparation of Metal Surfaces forAdhesiveBondingD3951 Practice for Commercial PackagingE595 Test Method for Total Mass Loss and Collected Vola-tile Condensable Materials from Outgassing in a VacuumEnvironment2.2 National Aeronautics and Space Administration(NASA):JSC SP-R-0022 General Specification,Vacuum StabilityRequirement of Polymeric Material for Spacecraft Appli-cation3MSFC-HDBK-527/JSC-09604 Material Selection List forHardware Systems3GSFC RP 1124 Outgassing Data for Selecting SpacecraftMaterials3NOTE1Copies of specifications,standards,drawings and publicationsrequired by suppliers in connection with specific purchases should beobtained from the purchaser or as directed by his contracting officer.3.Terminology3.1 Definitions:1This specification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of subcommittee D14.80 on MetalBonding Adhesives.Current edition approved Oct.1,2012.Published October 2012.Originallyapproved in 1999.Last previous edition approved in 2005 as D6411/D6411M-99(2005).DOI:10.1520/D6411_D6411M-99R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Unless otherwise indicated,copies of the above documents are available froma NASA installation library or document repository.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 Many terms in this specification are defined in Termi-nology D907.3.1.2 lot,na specific material that can be identified by theplace of manufacture,quantity and type of raw materials andprocess conditions used.3.2 Definitions of Terms Specific to This Standard:3.2.1 RTV,adjroom temperature vulcanizing.3.2.2 RTV Silicone Rubber Compound,na silicone resinbase(A)and a silicone resin curing agent(B)when mixed in aproper ratio results in a rubbery compound.A RTV siliconerubber compound that is manufactured by a unique combina-tion of raw