1、Designation: D3468/D3468M 99 (Reapproved 2013)1Standard Specification forLiquid-Applied Neoprene and ChlorosulfonatedPolyethylene Used in Roofing and Waterproofing1This standard is issued under the fixed designation D3468/D3468M; the number immediately following the designation indicates theyear of
2、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
3、.1 This specification covers liquid-applied neoprene andchlorosulfonated polyethylene synthetic rubber solutions suit-able for use in roofing and waterproofing.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may n
4、ot be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 The following precautionary caveat pertains only to thetest method portion, Section 9, of this specification: Thisstandard
5、does not purport to address the safety concerns, ifany, 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:
6、2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD429 Test Methods for Rubber PropertyAdhesion toRigid SubstratesD471 Test Method for Rubber PropertyEffect of LiquidsD711 Test Method for No-Pick-Up Time of Traffic PaintD823 Practices for Producing Films of Uniform Thickne
7、ssof Paint, Varnish, and Related Products on Test PanelsD1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD1640 Test Methods for Drying, Curing, or Film Formationof Organic Coatings at Room TemperatureD1644 Test Methods for Nonvolatile Content of VarnishesD1824 Tes
8、t Method for Apparent Viscosity of Plastisols andOrganosols at Low Shear RatesE96/E96M Test Methods for Water Vapor Transmission ofMaterials2.2 Department of Commerce Voluntary Product Standard:PS-1 Construction and Industrial Plywood33. Classification3.1 Type INeoprene synthetic rubber solutions fo
9、r usealone or in combination with chlorosulfonated polyethylenesynthetic rubber solutions:3.1.1 Grade 1Neoprene rubber solution.3.1.2 Grade 2Fiber-modified neoprene rubber solution.3.2 Type IIChlorosulfonated polyethylene synthetic rub-ber solutions.4. Materials and Manufacture4.1 The designated pol
10、ymer shall comprise 100 % of theelastomer and a minimum of 60 % of the nonvolatile content.4.2 The designated polymer shall be homogeneously com-pounded with pigments, extenders, stabilizers, antidegradants,and curatives. The product shall be free from graininess, gelparticles, and foreign materials
11、.5. Physical Requirements5.1 The material shall conform to the physical propertiesprescribed in Table 1.6. Sampling6.1 The sample shall be a 1-L 1-qt aliquot consisting of acomposite taken, when possible, from three or more separatecontainers chosen at random. Samples shall also be taken fromany oth
12、er containers that appear to be nonrepresentative andshall be tested separately. Before a sample is withdrawn, the1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.18on Nonbituminous Organic Roof Cover
13、ings.Current edition approved July 1, 2013. Published July 2013. Originally approvedin 1975. Last previous edition approved in 2006 as D3468 99 (2006)1. DOI:10.1520/D3468_D3468M-99R13E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
14、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from the Superintendent of Documents, U. S. Government PrintingOffice, Washington, DC 20402.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West
15、Conshohocken, PA 19428-2959. United States1contents in the container shall be mixed to uniform consis-tency. The sample shall be placed immediately in an airtightglass jar or metal can until tested.7. Retest and Rejection7.1 If the results of any test do not conform to the require-ments of this spec
16、ification, retesting to establish conformitymay be performed as agreed upon between the purchaser andthe seller.8. Specimen Preparation8.1 Prepare all film specimens in accordance with Method Dof Test Methods D823.4Take care to prevent puddling andkeep specimens horizontal at all times. When more th
17、an onecoat is required, allow each to dry to touch prior to applicationof subsequent coats.8.2 Prepare 0.25-mm 10-mil wet film specimens for de-termination of drying time on glass plates, approximately 15 by75 mm. 58 by 3 in.8.3 Prepare 0.75-mm 30-mil wet film specimens for de-termination of solids,
18、 percent by volume, on a release surface5approximately 75 by 150 mm 3 by 6 in.8.4 Prepare cured film specimens for all tests except adhe-sion on release paper5approximately 250 by 350 mm 10 by 14in.Adjust the doctor blade to produce a wet film that will givea total dry film thickness of approximatel
19、y 0.40 mm 15 milsafter two applications. Dry the specimens for 24 h at 23 6 2C73.4 6 3.6F and 50 6 5 % relative humidity, and then curethem in accordance with the coating manufacturers instruc-tions. Condition the cured specimens for 72 h at 23 6 2C73.4 6 3.6F before carefully stripping the film fro
20、m therelease paper.8.5 Prepare cured film specimens for the adhesion test onthe A face of a 13-mm 12-in. exterior grade plywood sheetconforming to the requirements of Voluntary Product StandardPS - 1, approximately 225 by 450 by 6 mm 9 by 18 by14 in.,with 150 mm 6 in. at one end covered by kraft pap
21、er. Usestrips of cellophane pressure-sensitive tape along each edge ofthe kraft paper to ensure smooth, tight contact with theplywood sheet. Prepare a primer consisting of one part of thetest coating and two parts of xylene, well stirred together.Brush-apply a coat of primer to the plywood sheet inc
22、ludingthe paper-covered end, and allow to dry to touch. Then applytwo coats of the undiluted test coating, each coat having aminimum wet-film thickness of 0.75 mm 30 mils. When thefinal test coat has dried for 24 h, brush-apply two coats ofneoprene contact adhesive6to the test specimen and to a 225
23、by600-mm 9 by 24-in. strip of No. 10 canvas duck.7Allow bothsurfaces to dry to a tacky state and then mate the coated side ofthe canvas strip to the test specimen to facilitate stripping of the4Hand-operated doctor blades are acceptable, provided that bubble-free filmsvarying no more than 5 % in thi
24、ckness can be produced.5Trifoil TFE-fluorocarbon-coated aluminum foil tape applied to a flat surfacesuch as glass has been found to be satisfactory. The sole source of supply of theapparatus known to the committee at this time is Tri-Point Industries, Inc., 1 TeflonWay, Long Island, NY 11725. If you
25、 are aware of alternative suppliers, pleaseprovide this information to ASTM International Headquarters. Your comments willreceive careful consideration at a meeting of the responsible technical committee,1which you may attend.6Manufacturers of neoprene roofing materials shall supply test quantities
26、of acompatible contact adhesive to facilitate testing of their coatings.7Available from tent and awning supply houses.TABLE 1 Physical Properties of Neoprene and Chlorosulfonated Polyethylene Synthetic Rubber Solutionsand Cured FilmsPropertyType I (Neoprene)Type II (ChlorosulfonatedPolyethylene)Grad
27、e 1 Grade 2min max min max min maxSynthetic rubber solutions:Solids, weight %Viscosity, mPas cP2 % of the qualification valueA20 % of the qualification valueADrying time, h:Dry-to-touch . 4 . 12 . 4Dry hard . 16 . 24 . 24Solids, volume % 20 . 20 . 20 .Cured films:Tensile strength, MPa psi 11 1600 .
28、4.8 700 . 4.8 700 .Elongation at 23 2C73.4 3.6F, %450 . 450 . 350 .Elongation at 18 2C0.4 3.6F, %120 . 120 . 120 .Permanent set at break, % . 50 . 50 . 50Elongation of aged film at 23 2C73.4 3.6F, %100 . 100 . 200 .Water absorption, % . 4.0 . 4.0 . 4.0Water vapor permeability, ng/Pasm perm-inches .
29、0.01460.010. 0.01460.010. 0.01460.010Ozone resistance . . . . no cracks under 10magnificationAdhesion, kN/m lbf/in. width 3.5 20 . 1.8 10 . . .AQualification value is that agreed upon between the seller and purchaser.D3468/D3468M 99 (2013)12film. Cure the test specimens in accordance with the coatin
30、gmanufacturers instructions, and then condition the curedspecimens for 72 h at 23 6 2C 73.4 6 3.6F. Afterconditioning, strip back the cellophane tape holding the kraftpaper to the plywood sheet and trim off. Cut through the canvaswith a sharp knife or razor blade to make 25-mm 1-in. strips.9. Test M
31、ethods9.1 Solids, Weight PercentMethod B of Test MethodsD1644.9.2 ViscosityTest Method D1824, Section 7, at 20 rpm.9.3 Drying Time:9.3.1 ScopeThis value indicates time between successivecoats and time to be provided before permitting access to a roofor deck.9.3.2 Significance and UseDry-to-touch ind
32、icates timeduring which the wet coating is susceptible to pick-up of dustor light debris, or both. Dry-hard time corresponds to theminimum allowable time for permitting access for recoatingpurposes. The manufacturer may specify longer times beforepermitting access by other trades or the public.9.3.3
33、 ApparatusA weighted spherical pin designed tocontact the surface of the test specimen, connected by an armto the shaft of an electric timing motor which completes onerevolution in 24 h.8The pin scribes an arc in the test coatinguntil the film has dried.The time along the arc is then measuredwith a
34、circular metal template marked from 0 to 24 h.9.3.4 ProcedurePlace the weighted spherical pin on thewet-film specimen and start the electric motor. Run until onlyslight scratching of the film is discernible. This is the dry-hardtime. Dry-to-touch time, as measured with the template, is thetime when
35、the coating no longer flows back into the channeland the spherical pin begins to leave an irregular trace.9.3.5 PrecisionHumidity, temperature, and air circulationmay cause wide variations in drying time. Consequently, mostcompounds will dry much faster than the specified maximums.The specified maxi
36、mum dry time is provided for the purposesof excluding compounds which could cause application prob-lems.9.4 Solids, Volume Percent:9.4.1 ScopeThis test value, in percent, expresses thevolume of film forming material contained in a given volumeof coating.9.4.2 Significance and UseThis test procedure
37、providesmeans for determining the quantity of material needed toprovide the proper film thickness on any given area.9.4.3 Test ProcedureMeasure wet-film thickness immedi-ately after casting with an Interchemical or Nordson Wet FilmGage9in at least six positions which are a minimum of 50 mm2 in. from
38、 any edge. Dry, cure, and condition the filmspecimens as described in 8.4. Carefully strip the film from therelease surface and measure the dry film thickness with amicrometer in at least six positions, a minimum of 50 mm 2in. from any edge. Calculate as follows:Solids, volume% 5 avg dry film thickn
39、ess/avg wet (1)film thickness) 31009.4.4 Precision and BiasThis test procedure is normallyaccurate within 0 to +5 %. Care must be taken to measure wetfilm thickness prior to significant loss of solvent; micrometerstend to measure high spots.9.5 Tensile Strength, Elongation, and Permanent Set atBreak
40、Test Methods D412. For elongation tests on aged film,place film specimens in an oven at 102 6 2C 215.6 6 3.6Ffor 7 days. Cool to 23 6 2C 73.4 6 3.6F before testing.9.6 Water AbsorptionTest Method D471, 7 days at 23 62C 73.4 6 3.6F.9.7 Water Vapor PermeabilityProcedure BW of TestMethods E96/E96M.9.8
41、Ozone ResistanceTest Method D1149, except that thetest specimens shall be subjected to 50 % elongation, the ozoneconcentration shall be 3 ppm, the period of exposure shall be 7days, and the observation magnification shall be 10.9.9 AdhesionTest Methods D429, Method B.10. Inspection10.1 Inspection of
42、 the material shall be made as agreed uponbetween the purchaser and the seller as part of the purchasecontract.11. Packaging and Marking11.1 The material shall be packaged in open-headcontainers, so constructed as to ensure acceptance by commonor other carrier for safe transportation at the lowest r
43、ate to thepoint of delivery.11.2 Containers shall be marked with the following infor-mation:11.2.1 Material name, type, and color,11.2.2 Quantity contained,11.2.3 Manufacturers lot number,11.2.4 Order number,11.2.5 Appropriate toxicity and hazard statement forsolvents,11.2.6 Lead-cured materials to
44、be labeled in accordancewith the Consumer Product Safety Commissions Regulations.8The sole source of supply of the apparatus, Gardner Circular Drying TimeRecorder (DG-9300-A), known to the committee at this time is Gardner Laboratory,Inc., Neotec Inst.-Div., Pacific Scientific Co., 2431 Linden Lane,
45、 Silver Spring, MD20910. If you are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.9The sole source of supply of the apparat
46、us, Interchemical Wet Film ThicknessGage. Catalog No. GG-6280F, known to the committee at this time is GardnerLaboratory, Inc., Neotec Inst.-Div., Pacific Scientific Co., 2431 Linden Lane, SilverSpring, MD 20910. If you are aware of alternative suppliers, please provide thisinformation to ASTM Inter
47、national Headquarters. Your comments will receivecareful consideration at a meeting of the responsible technical committee,1whichyou may attend.D3468/D3468M 99 (2013)1311.2.7 Usable shelf life and proper storage conditions, and11.2.8 Volume percent solids.12. Keywords12.1 chloroprene; coating; hypal
48、on; liquid-applied; roofingASTM 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
49、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 or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful considerati
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