ASTM D7311-07
(Specification)Standard Specification for Liquid-Applied, Single-Pack, Moisture-Triggered, Aliphatic Polyurethane Roofing Membrane
Standard Specification for Liquid-Applied, Single-Pack, Moisture-Triggered, Aliphatic Polyurethane Roofing Membrane
ABSTRACT
This specification covers in-situ applied, single-pack, moisture-triggered, aliphatic polyurethanes intended to form an elastomeric single-ply roofing membrane, once cured. The cured membrane may or may not contain a reinforcing material. The product, as manufactured, shall be in liquid form for application by brush, roller, or spray equipment. In-place roof system design criteria such as fire resistance, material compatibility, and uplift resistance, among others, are beyond the scope of this specification. Wet coatings shall be tested and shall conform to liquid property requirements as to viscosity, volume and weight of solids, and sag resistance. Dry films shall also be tested and conform to physical property requirements, as follows: tensile strength; elongation; accelerated weathering; water vapor transmission permeability and permeance; mandrel bend flexibility; tear resistance; Taber abrasion resistance; indentation hardness; dynamic and static puncture resistance; and adhesion bond strength.
SCOPE
1.1 This specification covers in-situ applied, single-pack, moisture-triggered, aliphatic polyurethanes intended to form an elastomeric single-ply membrane, once cured. The cured membrane may or may not contain a reinforcing material.
1.2 Single-pack, moisture-triggered, aliphatic polyurethanes are characterized by their ability to use moisture to trigger the curing process only.
1.3 The tests and property limits used to characterize the liquid material and cured membrane are values intended to ensure minimum quality. In-place roof system design criteria such as fire resistance, material compatibility, and uplift resistance, among others, are factors that shall be considered but are beyond the scope of this specification.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation: D7311 – 07
Standard Specification for
Liquid-Applied, Single-Pack, Moisture-Triggered, Aliphatic
Polyurethane Roofing Membrane
This standard is issued under the fixed designation D7311; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D412 Test Methods for Vulcanized Rubber and Thermo-
plastic Elastomers—Tension
1.1 This specification covers in-situ applied, single-pack,
D522 Test Methods for Mandrel Bend Test of Attached
moisture-triggered,aliphaticpolyurethanesintendedtoforman
Organic Coatings
elastomeric single-ply membrane, once cured.The cured mem-
D624 Test Method for Tear Strength of Conventional Vul-
brane may or may not contain a reinforcing material.
canized Rubber and Thermoplastic Elastomers
1.2 Single-pack, moisture-triggered, aliphatic polyurethanes
D1079 Terminology Relating to Roofing andWaterproofing
are characterized by their ability to use moisture to trigger the
D1644 Test Methods for Nonvolatile Content of Varnishes
curing process only.
D2196 Test Methods for Rheological Properties of Non-
1.3 The tests and property limits used to characterize the
Newtonian Materials by Rotational (Brookfield type) Vis-
liquid material and cured membrane are values intended to
cometer
ensure minimum quality. In-place roof system design criteria
D2240 Test Method for Rubber Property—Durometer
such as fire resistance, material compatibility, and uplift
Hardness
resistance, among others, are factors that shall be considered
D2697 Test Method forVolume Nonvolatile Matter in Clear
but are beyond the scope of this specification.
or Pigmented Coatings
1.4 The values stated in SI units are to be regarded as the
D4060 Test Method for Abrasion Resistance of Organic
standard. The values given in parentheses are for information
Coatings by the Taber Abraser
only.
D4400 Test Method for Sag Resistance of Paints Using a
1.5 This standard does not purport to address all of the
Multinotch Applicator
safety concerns, if any, associated with its use. It is the
D4541 TestMethodforPull-OffStrengthofCoatingsUsing
responsibility of the user of this standard to establish appro-
Portable Adhesion Testers
priate safety and health practices and determine the applica-
D5602 Test Method for Static Puncture Resistance of Roof-
bility of regulatory limitations prior to use.
ing Membrane Specimens
2. Referenced Documents
D5635 Test Method for Dynamic Puncture Resistance of
Roofing Membrane Specimens
2.1 ASTM Standards:
E96/E96M Test Methods for Water Vapor Transmission of
C717 Terminology of Building Seals and Sealants
Materials
C156 Test Method for Water Loss [from a Mortar Speci-
G154 Practice for Operating Fluorescent Light Apparatus
men] Through Liquid Membrane-Forming Curing Com-
for UV Exposure of Nonmetallic Materials
pounds for Concrete
C578 Specification for Rigid, Cellular Polystyrene Thermal
3. Terminology
Insulation
3.1 The following definitions have been developed specifi-
cally for the purposes of this specification. For general termi-
nology, see Terminologies D1079 and C717.
This specification is under the jurisdiction of ASTM Committee D08 on
3.2 Definitions of Terms Specific to This Standard:
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.18
3.3 aliphatic polyurethane—polyurethane is made by poly-
on Nonbituminous Organic Roof Coverings.
addition of aliphatic di-or polyfunctional hydroxyl group
Current edition approved Nov. 1, 2007. Published January 2008. DOI: 10.1520/
D7311-07.
containing compounds and of aliphatic polyfunctional prepoly-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mers.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.4 liquid-applied—amaterialoracombinationofmaterials
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. that can be poured, spread, or sprayed.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D7311 – 07
3.5 moisture-triggered—the mechanism by which moisture 7.5 Elongation and Tensile (Tension) Strengths (Test
activates a latent hardener contained within the material. Method D412):
3.6 single-pack—a material that is capable of being deliv- 7.5.1 Test conditions 23 6 2°C (73.4 6 3.6°F) at 50 65%
ered in one package, and applied without further additions. relative humidity.
7.5.2 Dumbbell specimens are Type IV, Die C.
4. Materials and Manufacture
7.5.3 Test type or functional equivalent:
7.5.3.1 Cross head speed.
4.1 The membrane shall be formulated from the principle
7.5.3.2 Dumbbell specimens 50 mm/min (1.95 in./min).
polymers and related formula ingredients.
7.5.4 Results expressed are at break.
4.2 Theproduct,asmanufactured,shallbeinliquidformfor
7.6 Accelerated Weathering (Practice G154):
application by brush, roller, or spray equipment.
7.6.1 Cycle employed—using type 313 lamps (UV-B).
4.3 Freshly applied material shall be capable of being
4 h UV at 60°C (140°F) uninsulated black panel temperature
bonded to cured material for making watertight field repairs.
4 h condensation at 50°C (122°F)
Supplier shall recommend suitable methods for surface prepa-
uninsulated black panel temperature 5000 h
ration necessary to achieve adhesion. J
Major irradiance between 290 and 340 nm
Irradiance level = 0.74 W/(m ·nm) at wavelength of 310 nm
5. Physical Properties
NOTE 1—Refer to Practice G154, Table X2.3, for maximum allowable
operational fluctuations of the temperature and irradiance set points. If the
5.1 The liquid coating shall comply with the physical
fluctuation is greater than the maximum allowable deviation for the set
property requirements in Table 1.
point at the control sensor during equilibrium operation, the test must be
5.2 The cured film shall comply with the physical property
discontinued until the problem is solved.
requirements in Table 2.
NOTE 2—Refer to Practice G154, Table X2.1, Note X2.7, for informa-
tion on the change in historical irradiance set point. The higher set point
6. Specimen Preparation
does not change the irradiance in the device of one manufacturer that
required modification of the radiometer calibration, but increases the
6.1 Films are prepared by draw-down bar, on siliconized
irradiance in equipment that did not require modification. Users should
release board, at a wet film thickness (WFT) necessary to yield
consult the manufacturer of their device for clarification if in doubt.
a dry film thickness (DFT) of 0.8 mm (0.032 in./32 mil). The
film is allowed to cure at 23 6 2°C (73.4 6 3.6°F) and 50 6
7.7 Water Vapor Transmission (Test Method E96/E96M):
5 % relative humidity for 24 6 2 h. This is followed by 24 h
7.7.1 Test to constant transmission at 32.2°C (90°F) and
at 60 6 2°C (140 6 3.6°F) oven curing and minimum 2 h
54 % relative humidity using Procedure C.
cooling.
7.7.2 The results may be expressed as water vapor trans-
6.1.1 The thickness tolerance for sample preparation shall
mission, permeance, or permeability in a
...
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