1、Designation:D6947/D6947M07(Reapproved 2013)1Standard Specification forLiquid Applied Moisture Cured Polyurethane Coating Usedin Spray Polyurethane Foam Roofing System1This standard is issued under the fixed designation D6947/D6947M;the number immediately following the designation indicates theyear o
2、f 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.1NOTEUnits information was editorially corrected in July 2013.1.Scope1.1 Th
3、is specification covers a single component,moisturecured,elastomeric urethane polymer coating used as a protec-tive coating for spray polyurethane foam roofing systems.1.2 This specification does not provide guidance for appli-cation.1.3 The values stated in either SI units or inch-pound unitsare to
4、 be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 The following precautionary caveat pertains only to t
5、hetest method portions,Sections 5 and 6.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory req
6、uirements prior to use.2.Referenced Documents2.1 ASTM Standards:2D16 Terminology for Paint,Related Coatings,Materials,andApplicationsD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD522 Test Methods for Mandrel Bend Tes
7、t of AttachedOrganic CoatingsD562 Test Method for Consistency of Paints MeasuringKrebs Unit(KU)Viscosity Using a Stormer-Type Viscom-eterD624 Test Method for Tear Strength of Conventional Vul-canized Rubber and Thermoplastic ElastomersD903 Test Method for Peel or Stripping Strength of Adhe-sive Bond
8、sD1079 Terminology Relating to Roofing and WaterproofingD1644 Test Methods for Nonvolatile Content of VarnishesD1653 Test Methods for Water Vapor Transmission of Or-ganic Coating FilmsD2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational(Brookfield type)ViscometerD26
9、97 Test Method for Volume Nonvolatile Matter in Clearor Pigmented CoatingsD2370 Test Method for Tensile Properties of Organic Coat-ingsD4798 Practice for Accelerated Weathering Test Conditionsand Procedures for Bituminous Materials(Xenon-ArcMethod)G21 Practice for Determining Resistance of Synthetic
10、 Poly-meric Materials to Fungi3.Terminology3.1 For definitions of terms specific to this standard,refer toTerminologies D16 and D1079.4.Materials and Manufacture4.1 CompositionThe product,as manufactured,shall be inliquid form for application to spray polyurethane foam(SPF)surfaces by brushing,rolli
11、ng,or spraying.The product shall becomposed of a solvent-borne moisture curing urethane elasto-meric polymer,to which various pigments or other additiveshave been added to give the required physical properties.4.2 Physical PropertiesAlthough the product is suppliedas a liquid,its performance is base
12、d on the functional proper-ties of the dried material in film form.The coating is formedinto a film fully adhered to the substrate surface.1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.06on Spray P
13、olyurethane Foam Roof Systems.Current edition approved July 1,2013.Published July 2013.Originally approvedin 2006.Last previous edition approved in 2013 as D6947 07(2013).DOI:10.1520/D6947-07R13E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at
14、serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Physical Properties5.1 The liquid coating shall comply w
15、ith physical propertyrequirements in Table 1.5.2 The film shall comply with physical property require-ments in Table 2.6.Sample and Test Methods6.1 Viscosity(Test Methods D2196)Brookfield LVT Vis-cometer#4 Spindle,6 RPM.6.2 Specimen Preparation(Dry Time)Films are preparedby applying two coats,with a
16、 minimum of an 8-h drying periodbetween coats,to an FEB sheet substrate to give a total dry filmthickness of 0.50 6 0.5 mm 20 6 2 mils.The film is allowedto thoroughly dry at 23 6 2C 73.4 6 3.6F and 50 6 10%relative humidity for 336 6 12 h.The film shall be removedfrom the release paper and turned over after the first 168 6 12h to allow for complete curing.6.3 Elongation and Tensile Strength(Test Method D2370):6.3.1 Test Conditions:23 6 2C 73 6 3.6F at 50 6 10%relative humidity and 18 6 2C 0 6 3
