1、Designation: D 3468 99 (Reapproved 2006)e1Standard Specification forLiquid-Applied Neoprene and ChlorosulfonatedPolyethylene Used in Roofing and Waterproofing1This standard is issued under the fixed designation D 3468; the number immediately following the designation indicates the year oforiginal ad
2、option or, in the case 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.e1NOTEEditorially switched from English dominant to SI dominant in May 2006.1. Sc
3、ope1.1 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 SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 The fol
4、lowing precautionary caveat pertains only to thetest method portion, Section 9, of this specification: Thisstandard 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 healthpractice
5、s and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 429 Test Methods for Rubber PropertyAdhesion toRigid SubstratesD 471 Test Method for Rubber PropertyEffe
6、ct of LiquidsD 711 Test Method for No-Pick-Up Time of Traffic PaintD 823 Practices for Producing Films of Uniform Thicknessof Paint, Varnish, and Related Products on Test PanelsD 1149 Test Method for Rubber DeteriorationSurfaceOzone Cracking in a ChamberD 1640 Test Methods for Drying, Curing, or Fil
7、m Forma-tion of Organic Coatings at Room TemperatureD 1644 Test Methods for Nonvolatile Content of VarnishesD 1824 Test Method for Apparent Viscosity of Plastisolsand Organosols at Low Shear RatesE 96/E 96M Test Methods for Water Vapor Transmission ofMaterials2.2 Department of Commerce Voluntary Pro
8、duct Standard:PS-1 Construction and Industrial Plywood33. Classification3.1 Type INeoprene synthetic rubber solutions for 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
9、.3.2 Type IIChlorosulfonated polyethylene synthetic rub-ber solutions.4. Materials and Manufacture4.1 The designated polymer 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, s
10、tabilizers, antidegradants,and curatives. The product shall be free from graininess, gelparticles, and foreign materials.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 acompo
11、site taken, when possible, from three or more separatecontainers chosen at random. Samples shall also be taken fromany other containers that appear to be nonrepresentative and1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibil
12、ity of Subcommittee D08.18on Nonbituminous Organic Roof Coverings.Current edition approved May 1, 2006. Published June 2006. Originallyapproved in 1975. Last previous edition approved in 1999 as D 3468 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer S
13、ervice at serviceastm.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 20402.1Copyright ASTM International, 100 Barr Harbor Drive,
14、 PO Box C700, West Conshohocken, PA 19428-2959, United States.shall be tested separately. Before a sample is withdrawn, thecontents 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 Rejectio
15、n7.1 If the results of any test do not conform to the require-ments of this specification, 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 D 823.4Take
16、 care to prevent puddling andkeep specimens horizontal at all times. When more than 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
17、 by 3 in).8.3 Prepare 0.75-mm (30-mil) wet film specimens for de-termination of solids, 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 th
18、e doctor blade to produce a wet film that will givea total dry film thickness of approximately 0.40 mm (15 mils)after two applications. Dry the specimens for 24 h at 23 6 2C(73.4 6 3.6F) and 50 6 5 % relative humidity, and then curethem in accordance with the coating manufacturers instruc-tions. Con
19、dition the cured specimens for 72 h at 23 6 2C(73.4 6 3.6F) before carefully stripping the film from 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
20、, approximately 225 by 450 by 6 mm (9 by 18 by14 in.),with 150 mm (6 in.) at one end covered by kraft paper. 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 coa
21、ting and two parts of xylene, well stirred together.Brush-apply a coat of primer to the plywood sheet includingthe 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 co
22、at has dried for 24 h, brush-apply two coats ofneoprene contact adhesive6to the test specimen and to a 225 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 t
23、hefilm. Cure the test specimens in accordance with the coatingmanufacturers 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 kraft4Hand-operated doctor blades are acceptable, provided that bubble-free
24、 filmsvarying no more than 5 % in thickness 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 Tef
25、lonWay, Long Island, NY 11725. If you 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 ma
26、terials shall supply test quantities 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
27、II (ChlorosulfonatedPolyethylene)Grade 1 Grade 2min max min max min maxSynthetic rubber solutions:Solids, weight %Viscosity, mPas (cP)62 % of the qualification valueA620 % of the qualification valueADrying time, h:Dry-to-touch . 4 . 12 . 4Dry hard . 16 . 24 . 24Solids, volume % 20 . 20 . 20 .Cured f
28、ilms:Tensile strength, MPa (psi) 11 (1600) . 4.8 (700) . 4.8 (700) .Elongation at 23 6 2C(73.4 6 3.6F), %450 . 450 . 350 .Elongation at 18 6 2C(0.4 6 3.6F), %120 . 120 . 120 .Permanent set at break, % . 50 . 50 . 50Elongation of aged film at 23 6 2C(73.4 6 3.6F), %100 . 100 . 200 .Water absorption,
29、% . 4.0 . 4.0 . 4.0Water vapor permeability, ng/Pasm (perm-inches) . 0.0146(0.010). 0.0146(0.010). 0.0146(0.010)Ozone resistance . . . . no cracks under 103magnificationAdhesion, kN/m (lbf/in.) width 3.5 (20) . 1.8 (10) . . .AQualification value is that agreed upon between the seller and purchaser.D
30、 3468 99 (2006)e12paper 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 Methods9.1 Solids, Weight PercentMethod B of Test MethodsD 1644.9.2 ViscosityTest Method D 1824, Section 7, at 20 rpm.9.3 Drying Time:9.3.1 ScopeThi
31、s 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 indicates timeduring which the wet coating is susceptible to pick-up of dustor light debris, or both. Dry-hard time corresponds to theminimum allowa
32、ble time for permitting access for recoatingpurposes. The manufacturer may specify longer times beforepermitting access by other trades or the public.9.3.3 ApparatusA weighted spherical pin designed tocontact the surface of the test specimen, connected by an armto the shaft of an electric timing mot
33、or 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 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 moto
34、r. 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 the coating no longer flows back into the channeland the spherical pin begins to leave an irregular trace.9.3.5 PrecisionHumidity, temperature, a
35、nd air circulationmay cause wide variations in drying time. Consequently, mostcompounds will dry much faster than the specified maximums.The specified maximum dry time is provided for the purposesof excluding compounds which could cause application prob-lems.9.4 Solids, Volume Percent:9.4.1 ScopeThi
36、s test value, in percent, expresses thevolume of film forming material contained in a given volumeof coating.9.4.2 Significance and UseThis test procedure providesmeans for determining the quantity of material needed toprovide the proper film thickness on any given area.9.4.3 Test ProcedureMeasure w
37、et-film thickness immedi-ately after casting with an Interchemical or Nordson Wet FilmGage9in at least six positions which are a minimum of 50 mm(2 in.) from any edge. Dry, cure, and condition the filmspecimens as described in 8.4. Carefully strip the film from therelease surface and measure the dry
38、 film thickness with amicrometer in at least six positions, a minimum of 50 mm (2in.) from any edge. Calculate as follows:Solids, volume % 5avg dry film thickness/avg wetfilm thickness!3100 (1)9.4.4 Precision and BiasThis test procedure is normallyaccurate within 0 to +5 %. Care must be taken to mea
39、sure wetfilm thickness prior to significant loss of solvent; micrometerstend to measure high spots.9.5 Tensile Strength, Elongation, and Permanent Set atBreakTest Methods D 412. For elongation tests on aged film,place film specimens in an oven at 102 6 2C (215.6 6 3.6F)for 7 days. Cool to 23 6 2C (7
40、3.4 6 3.6F) before testing.9.6 Water AbsorptionTest Method D 471, 7 days at 23 62C (73.4 6 3.6F).9.7 Water Vapor PermeabilityProcedure BW of TestMethods E 96.9.8 Ozone ResistanceTest Method D 1149, except that thetest specimens shall be subjected to 50 % elongation, the ozoneconcentration shall be 3
41、 ppm, the period of exposure shall be 7days, and the observation magnification shall be 103.9.9 AdhesionTest Methods D 429, Method B.10. Inspection10.1 Inspection of the material shall be made as agreed uponbetween the purchaser and the seller as part of the purchasecontract.11. Packaging and Markin
42、g11.1 The material shall be packaged in open-head contain-ers, so constructed as to ensure acceptance by common or othercarrier for safe transportation at the lowest rate to the point ofdelivery.11.2 Containers shall be marked with the following infor-mation:11.2.1 Material name, type, and color,11.
43、2.2 Quantity contained,11.2.3 Manufacturers lot number,11.2.4 Order number,11.2.5 Appropriate toxicity and hazard statement for sol-vents,11.2.6 Lead-cured materials to be labeled in accordancewith the Consumer Product Safety Commissions Regulations.11.2.7 Usable shelf life and proper storage condit
44、ions, and11.2.8 Volume percent solids.12. Keywords12.1 chloroprene; coating; hypalon; liquid-applied; roofing8The 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 Scien
45、tific Co., 2431 Linden Lane, 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 sou
46、rce of supply of the apparatus, 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 t
47、hisinformation to ASTM International Headquarters. Your comments will receivecareful consideration at a meeting of the responsible technical committee,1whichyou may attend.D 3468 99 (2006)e13ASTM International takes no position respecting the validity of any patent rights asserted in connection with
48、 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 infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible techni
49、cal 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 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 known to the ASTM Committee on Standards, at the address shown be
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