1、Designation: D6947/D6947M 07 (Reapproved 2013)1D6947/D6947M 16Standard 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
2、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 NOTEUnits information was editorially corrected
3、in July 2013.1. Scope1.1 This specification covers a single component, moisture cured, elastomeric urethane polymer coating used as a protectivecoating for spray polyurethane foam roofing systems.1.2 This specification does not provide guidance for application.1.3 The values stated in either SI unit
4、s or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.4 The following preca
5、utionary caveat pertains only to the test method portions, Sections 5 and 6.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determi
6、ne the applicability of regulatoryrequirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D16 Terminology for Paint, Related Coatings, Materials, and ApplicationsD412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTensionD471 Test Method for Rubber PropertyEffect of Liqu
7、idsD522 Test Methods for Mandrel Bend Test of Attached Organic CoatingsD562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type ViscometerD624 Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic ElastomersD903 Test Method for P
8、eel or Stripping Strength of Adhesive BondsD1079 Terminology Relating to Roofing and WaterproofingD1644 Test Methods for Nonvolatile Content of VarnishesD1653 Test Methods for Water Vapor Transmission of Organic Coating FilmsD2196 Test Methods for Rheological Properties of Non-Newtonian Materials by
9、 Rotational ViscometerD2697 Test Method for Volume Nonvolatile Matter in Clear or Pigmented CoatingsD2370 Test Method for Tensile Properties of Organic CoatingsD4798 Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method)E1953 Practice for Descr
10、iption of Thermal Analysis and Rheology ApparatusG21 Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi3. Terminology3.1 For definitions of terms specific to this standard, refer to Terminologies D16 and D1079.1 This specification is under the jurisdiction of ASTM Committe
11、e D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.06 on SprayPolyurethane Foam Roof Systems.Current edition approved July 1, 2013Jan. 1, 2016. Published July 2013January 2016. Originally approved in 2006. Last previous edition approved in 2013 asD6947D6947/D6947
12、M 07 (2013).(2013)1. DOI: 10.1520/D6947-07R13E01.10.1520/D6947_D6947M-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the A
13、STM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consu
14、lt prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Materials and Manufacture4.1 Comp
15、ositionThe product, as manufactured, shall be in liquid form for application to spray polyurethane foam (SPF)surfaces by brushing, rolling, or spraying. The product shall be composed of a solvent-borne moisture curing urethane elastomericpolymer, to which various pigments or other additives have bee
16、n added to give the required physical properties.4.2 Physical PropertiesAlthough the product is supplied as a liquid, its performance is based on the functional properties ofthe dried material in film form. The coating is formed into a film fully adhered to the substrate surface.5. Physical Properti
17、es5.1 The liquid coating shall comply with physical property requirements in Table 1.5.2 The film shall comply with physical property requirements in Table 2.6. Sample and Test Methods6.1 Viscosity (Test Methods D2196): Brookfield LVT Viscometer #4 Spindle, 6 RPM.6.1.1 A Rotational Viscometer (see P
18、ractice E1953) with 60 to 70 Nm torque full scale equipped with a spindle with a shearrate of 1.2 to 1.3 s-1 at 0.63 rad s-1 (6 r/min).6.2 Specimen Preparation (Dry Time)Films are prepared by applying two coats, with a minimum of an 8-h drying periodbetween coats, to an FEB sheet substrate to give a
19、 total dry film thickness 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 removed fromthe release paper and turned over after the first 168 6 12 h to allow for complete curing.6.3 Elongation a
20、nd 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 3.6F.6.3.2 Cut specimen measuring 75 mm 3 in. long by 13 mm 12 in. 6 10 % wide.6.3.3 Test type or functional equivalent:Cross head speed 0.4 mm/s 1.0 in./minGauge length 25
21、 mm 1.0 in.6.4 Accelerated Weathering (Practice D4798):Cycle Employed AUninsulated Black Panel Temperature 63 3CFilter DaylightRadiant Exposure (Minimum) 1260 KJ/m2 nm 340nm151.2 MJ/m2 300400nmNOTE 1Based on the irradiance level of 0.35 W/(m2 nm) at 340 nm specified in Practice D4798, the exposure t
22、ime required to accumulate the radiantenergy specified in 6.4 is 1000 h.6.5 Permeance (Test Methods D1653, Procedure B)A 0.5 mm 20 mils 6 10 % film shall be used.6.5.1 Test Conditions: 23 6 2C 73.4 6 3.6F.6.5.2 Test is run in the inverted position with water in contact with the film.6.5.3 Value is r
23、eported in SI units.6.6 Water Absorption (Test Method D471)The test shall be conducted at 23 6 2C 73.4 6 3.6F using a 0.5 mm 20 mil6 10 % film immersed in distilled water for a period of 168 6 4 h. At that time the weight is determined.6.7 Adhesion to Specified Substrate (Test Method D903):6.7.1 Cro
24、sshead speed 0.8 mm/s 2 in./min.6.7.2 Specimens are prepared by brush applying two coats to the specified substrate with the cloth strip (as described in TestMethod D903) embedded between the coats to give a total dry film thickness of 0.5 mm 20 mils 6 10 %. The panels are allowedto cure for 336 6 1
25、2 h at 23 6 2C 73.4 6 3.6F 50 6 10 % relative humidity prior to testing for wet adhesion. If a primer isspecified, it shall be applied per the manufacturers or suppliers direction.6.7.3 Specimens shall be submerged for 168 6 6 h in tap water at 23 6 2C 73.4 6 3.6F prior to testing for wet adhesion.S
26、amples are tested immediately after soaking.TABLE 1 Liquid Property RequirementsPhysicalProperties ASTM RequirementsViscosity D562D219690 to 110 KU12 to 85 PasVolume Solids D2697 Greater than 65 %Weight Solids D1644 As listed by ManufacturerD6947/D6947M 1626.8 Tear Resistance (Test Method D624)Die “
27、C.”6.9 Low Temperature Flexibility (Test Method D522)Directly cast films to aluminum substrate to result in a dry film thicknessof 0.36 mm610 % 14 mil610 % and allow to cure 72 h at 2362C 73.463.6F and 50610 % relative humidity followedby 120 h at 50C prior to testing.7. Performance Requirements7.1
28、Shipping containers shall be marked with the name of the material, the stock number, lot number, ASTM designationnumber and year of issue, quantity therein, shelf-life date, and the name of the manufacturer or supplier.8. Inspection8.1 Inspection requirements shall be determined by and as agreed upo
29、n between the purchaser and the supplier.9. Rejection and Resubmittal9.1 Failure to conform to any one of the requirements prescribed in this specification shall constitute grounds for rejection. Theseller shall have the right to reinspect the rejected shipment and resubmit the lot after removal of
30、those packages not conformingto the specified requirements.10. Precision and Bias10.1 The precision statements for the test methods included in this specification are under development.11. Keywords11.1 elastomeric coating; moisture cured; polyurethane coating; roof; rotational viscometer; spray poly
31、urethane foamfoam;viscosityASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infri
32、ngement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard
33、 or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views
34、 known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting
35、 ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-
36、2600; http:/ 2 Film Physical Property Requirements for PolyurethaneMoisture Cured Coating for Use on Sprayed Polyurethane FoamPhysicalProperty ASTM RequirementInitial Percent Elongation(break)D2370 Minimum 350 %Initial Tensile Strength(maximum stress)D2370 Minimum 4.14 MPa 600psiFinal Percent Elonga
37、tion(break) after acceleratedweathering after 1000 hD412 Minimum 350 %Permeance D1653Procedure BMaximum Permeance57 ng/(m 2 s Pa)1 grain/ft2 h in.-HgWater Absorption (Mass) D471 Maximum 3 %Accelerated Weathering1000 hD4798 No cracking or checkingAdhesion D903 Minimum 350 N/m 2.0pliWetFungi Resistance G21 Zero RatingTear Resistance D624 Minimum 17.5 kNm100 pliLow TemperatureFlexibility, 12.5 mm 12 in.D522 Minimum pass mandrel-26C -15FD6947/D6947M 163
