1、Designation: D 7311 07Standard Specification forLiquid-Applied, Single-Pack, Moisture-Triggered, AliphaticPolyurethane Roofing Membrane1This standard is issued under the fixed designation D 7311; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers in-situ applied, single-pack,moisture-triggered, aliphatic polyure
3、thanes intended to form anelastomeric single-ply membrane, once cured. The cured mem-brane may or may not contain a reinforcing material.1.2 Single-pack, moisture-triggered, aliphatic polyurethanesare characterized by their ability to use moisture to trigger thecuring process only.1.3 The tests and
4、property limits used to characterize theliquid material and cured membrane are values intended toensure minimum quality. In-place roof system design criteriasuch as fire resistance, material compatibility, and upliftresistance, among others, are factors that shall be consideredbut are beyond the sco
5、pe of this specification.1.4 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.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
6、standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and SealantsC 156 Test Method for Water Retention by LiquidMembrane-Forming Curing Com
7、pounds for ConcreteC 578 Specification for Rigid, Cellular Polystyrene ThermalInsulationD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 522 Test Methods for Mandrel Bend Test of AttachedOrganic CoatingsD 624 Test Method for Tear Strength of ConventionalVulcanized Rubbe
8、r and Thermoplastic ElastomersD 1079 Terminology Relating to Roofing and Waterproof-ingD 1644 Test Methods for Nonvolatile Content of VarnishesD 2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) Vis-cometerD 2240 Test Method for Rubber PropertyDu
9、rometerHardnessD 2697 Test Method for Volume Nonvolatile Matter inClear or Pigmented CoatingsD 4060 Test Method for Abrasion Resistance of OrganicCoatings by the Taber AbraserD 4400 Test Method for Sag Resistance of Paints Using aMultinotch ApplicatorD 4541 Test Method for Pull-Off Strength of Coati
10、ngsUsing Portable Adhesion TestersD 5602 Test Method for Static Puncture Resistance ofRoofing Membrane SpecimensD 5635 Test Method for Dynamic Puncture Resistance ofRoofing Membrane SpecimensE 96/E 96M Test Methods for Water Vapor Transmission ofMaterialsG 154 Practice for Operating Fluorescent Ligh
11、t Apparatusfor UV Exposure of Nonmetallic Materials3. Terminology3.1 The following definitions have been developed specifi-cally for the purposes of this specification. For general termi-nology, see Terminologies D 1079 and C 717.3.2 Definitions of Terms Specific to This Standard:3.3 aliphatic polyu
12、rethanepolyurethane is made by poly-addition of aliphatic di-or polyfunctional hydroxyl groupcontaining compounds and of aliphatic polyfunctional prepoly-mers.3.4 liquid-applieda material or a combination of materialsthat can be poured, spread, or sprayed.3.5 moisture-triggeredthe mechanism by which
13、 moistureactivates a latent hardener contained within the material.3.6 single-packa material that is capable of being deliv-ered in one package, and applied without further additions.1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct res
14、ponsibility of Subcommittee D08.18on Nonbituminous Organic Roof Coverings.Current edition approved Nov. 1, 2007. Published January 2008.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume in
15、formation, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Materials and Manufacture4.1 The membrane shall be formulated from the principlepolymers and related formul
16、a ingredients.4.2 The product, as manufactured, shall be in liquid form forapplication by brush, roller, or spray equipment.4.3 Freshly applied material shall be capable of beingbonded to cured material for making watertight field repairs.Supplier shall recommend suitable methods for surface prepa-r
17、ation necessary to achieve adhesion.5. Physical Properties5.1 The liquid coating shall comply with the physicalproperty requirements in Table 1.5.2 The cured film shall comply with the physical propertyrequirements in Table 2.6. Specimen Preparation6.1 Films are prepared by draw-down bar, on silicon
18、izedrelease board, at a wet film thickness (WFT) necessary to yielda dry film thickness (DFT) of 0.8 mm (0.032 in./32 mil). Thefilm is allowed to cure at 23 6 2C (73.4 6 3.6F) and 50 65 % relative humidity for 24 6 2 h. This is followed by 24 hat 60 6 2C (140 6 3.6F) oven curing and minimum 2 hcooli
19、ng.6.1.1 The thickness tolerance for sample preparation shallbe +15 %, -10 % of that shown in 6.1.6.1.2 Samples shall be prepared equal to the width of a 12.5cm (5 in.) draw-down bar by 30.5 cm (12 in.) in length. Curedfilms should be inspected for imperfections (for example,pinholes) and any such a
20、reas rejected. If necessary, recast thefilms. Trim 1.75 cm (0.69 in.) off each edge of the cured film.Test work is carried out on the remaining 9 by 27 cm (3.54 by10.63 in.) cured film.7. Test Methods7.1 Viscosity (Test Method D 2196)Brookfield HAT Vis-cometer No. 4 spindle, 2.1 radians per second (
21、20 rpm) at 20C(68F).7.2 Volume Solids (Test Method D 2697)Oven cure forminimum 16 h at 110 6 2C (230 6 3.6F).7.3 Weight Solids (Test Method D 1644)Oven cure forminimum 16 h at 110 6 2C (230 6 3.6F).7.4 Sag Resistance (Test Method D 4400):7.4.1 Test Conditions 23 6 2C (73.4 6 3.6F).7.4.2 Determine in
22、 accordance with range ASM-3.7.5 Elongation and Tensile (Tension) Strengths (TestMethod D 412):7.5.1 Test conditions 23 6 2C (73.4 6 3.6F) at 50 6 5%relative humidity.7.5.2 Dumbbell specimens are Type IV, Die C.7.5.3 Test type or functional equivalent:7.5.3.1 Cross head speed.7.5.3.2 Dumbbell specim
23、ens 50 mm/min (1.95 in./min).7.5.4 Results expressed are at break.7.6 Accelerated Weathering (Practice G 154):7.6.1 Cycle employedusing type 313 lamps (UV-B).4 h UV at 60C (140F) uninsulated black panel temperatureJ5000 h4 h condensation at 50C (122F)uninsulated black panel temperatureMajor irradian
24、ce between 290 and 340 nmIrradiance level = 0.74 W/(m2nm) at wavelength of 310 nmNOTE 1Refer to Practice G 154, Table X2.3, for maximum allowableoperational fluctuations of the temperature and irradiance set points. If thefluctuation is greater than the maximum allowable deviation for the setpoint a
25、t the control sensor during equilibrium operation, the test must bediscontinued until the problem is solved.NOTE 2Refer to Practice G 154, Table X2.1, Note X2.7, for infor-mation on the change in historical irradiance set point. The higher set pointdoes not change the irradiance in the device of one
26、 manufacturer thatrequired modification of the radiometer calibration, but increases theirradiance in equipment that did not require modification. Users shouldconsult the manufacturer of their device for clarification if in doubt.7.7 Water Vapor Transmission (Test Method E 96):7.7.1 Test to constant
27、 transmission at 32.2C (90F) and54 % relative humidity using Procedure C.7.7.2 The results may be expressed as water vapor trans-mission, permeance, or permeability in accordance with TestMethod E 96/E 96M.7.8 FlexibilityMandrel Bend (Test Method D 522):7.8.1 Method B with 304.8 by 101.6 mms (12 by
28、4 in.).7.8.2 Test carried out at 23 6 2C (73.4 6 3.6C) and 50 65 % relative humidity.7.8.3 Result in Table 2 is for 3.2 mm (18-in.) cylindricalmandrel.7.9 Tear Resistance (Test Method D 624):7.9.1 Test samples are trouser shapesDie C.7.9.2 Tear rate is 50 mm/min (1.97 in./min).7.9.3 Test carried out
29、 at 23 6 2C (73.4 6 3.6C) and 50 65 % relative humidity.7.10 Abrasion Resistance (Test Method D 4060):7.10.1 CS-17 wheels.7.10.2 Test to run for 1000 cycles with l000 g (2.2 1b)loading.7.10.3 Test panels 101.6 by 101.6 mm (4 by 4 in.).7.10.4 Test carried out at 23 6 2C (73.4 6 3.6C) and 506 5 % rela
30、tive humidity.7.11 Indentation Hardness (Test Method D 2240):7.11.1 Test carried out at 23 6 2C (73.4 63 .6C) and 506 5 % relative humidity.7.11.2 Test material may be wet applied/adhered to a panelof harder material (for example, aluminium), or as a curedsheet placed on a harder surface such as alu
31、minium.7.12 Dynamic Puncture Resistance (Test Method D 5635):7.12.1 Test conditions 23 6 2C (73.4 6 3.6F) and 50 65 % relative humidity.7.12.2 Test may be carried out in compliance with protocolPA 114, Appendix 1, such as indicated by Miami DadeAuthority, in which case the sample is conditioned at 2
32、5 6 2C(77 6 3F) and 50 6 5 % relative humidity. The test procedureis then followed in compliance with Test Method D 5635.TABLE 1 Liquid Property RequirementsPhysical Properties ASTM RequirementsViscosity D 2196 5 to 20 Pa.s (Pascal.seconds)Volume solids D 2697 76 % minWeight solids D 1644 83 % minSa
33、g resistance D 4400 No sag at 700 m (0.028 in./28 mil)D73110727.12.3 Substrate is Type IX, Rigid, Cellular Polystyreneconforming to Specification C 578.7.12.4 Test result is recorded as the load at which nopuncture occurs but above which the specimen is punctured.7.13 Static Puncture Resistance (Tes
34、t Method D 5602):7.13.1 Test conditions 23 6 2C (73.4 6 3.6F) and 50 65 % relative humidity.7.13.2 Test may be carried out in compliance with protocolPA 114, Appendix 1, such as indicated by Miami DadeAuthority, in which case the sample is conditioned at 25 6 2C(77 6 3F) and 50 6 5 % relative humidi
35、ty. The test procedureis then followed in compliance with Test Method D 5635.7.13.3 Substrate is Type IX, Rigid, Cellular Polystyreneconforming to Specification C 578.7.13.4 Test result is recorded as the load at which a punctureoccurs but above which the specimen is punctured.7.14 Adhesion Bond Str
36、ength (Test Method D 4541):7.14.1 Test carried out at 23 6 2C (73.4 6 3.6F).7.14.2 Test material cured for 7 days prior to fixing dollieswith a 100 % solids urethane adhesive. Test dollies allowed tostand 24 h prior to pull off.7.14.3 A suitable standard mortar test substrate may beprepared in accor
37、dance with Test Method C 156. Other specificsubstrates may be used providing they are fully defined andagreed between supplier and customer.7.14.4 Test is Method-B (Type II tester).8. Packaging and Package Marking8.1 The material shall be packaged in a standard commer-cial manner, unless otherwise s
38、pecified, so as to be acceptableby commercial or other carriers for safe transportation to thepoint of delivery.8.2 Shipping containers shall be marked with:8.2.1 The name of the material,8.2.2 Product code,8.2.3 ASTM designation,8.2.4 Size or quantity, and8.2.5 Name of manufacturer or supplier.9. I
39、nspection9.1 Inspection shall be determined by and as agreed be-tween the purchaser and the supplier.10. Rejection and Resubmittal10.1 Failure to conform to any one of the requirementsprescribed in this specification shall constitute grounds forrejection. Rejection shall be reported to the supplier
40、promptlyand in writing. The seller shall have the right to reinspect therejected shipment and resubmit the lot after removal of thosepackages not conforming to the specified requirements. Pur-chaser shall apply same test methods, as applied to rejectedshipment, to resubmitted material to ensure comp
41、liance withspecification.11. Keywords11.1 aliphatic polyurethane; elastomeric polyurethane;moisture trigger polyurethane; roof waterproofing; single-packASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. U
42、sers of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement 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 eve
43、ry five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible techn
44、ical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views 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 Conshohock
45、en, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting 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).TABLE 2 Film Physical Proper
46、ty Requirements for Moisture-Triggered Aliphatic Polyurethane Roofing MembranesPhysical Properties ASTM RequirementsTensile strength (tension) D 412 min 1.86 MPa (270 lb/in.2)Elongation D 412 min 200 %Accelerated weathering FL/UV 5000 h G 154 No cracking or checkingWater vapor transmission permeabil
47、ity/permeance E 96/E 96M Max 8.52 g/m2/day (0.033 perm-in.)Flexibilitymandrel bend D 522 Passno cracking or flakingTear resistance D 624 Min 5.8 kN/m (33 lbf/in.)Abrasion resistanceTaber D 4060 Max 90 mgIndentation hardness D 2240 82 durometer units (65 units)Dynamic puncture resistance D 5635 Min 15 J (357 ft.poundals)Static puncture resistance D 5602 Min 20.7ow kg (45.5 lb)Adhesion bond strength D 4541 Min 2.1 MPA (300 psi)(Concrete substrate)D7311073
