1、Designation: C 1184 05Standard Specification forStructural Silicone Sealants1This standard is issued under the fixed designation C 1184; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenth
2、eses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification describes the properties of cold liquidapplied, single-component or multicomponent, chemically cur-ing elastomeric structural silico
3、ne sealants herein referred to asthe sealant. These sealants are intended to structurally adherecomponents of structural sealant glazing systems.1.2 Only those properties for which there are industry-agreed-upon minimum acceptable requirements, as determinedby available ASTM test methods, are descri
4、bed in this speci-fication. Additional properties may be added as ASTM testmethods for those properties become available.1.3 The values stated in metric (SI) units are to be regardedas the standard. The values in parentheses are for informationonly.1.4 Committee C24, with jurisdiction over this spec
5、ifica-tion, is aware of two comparable standards by other organiza-tions: ETAG No. 002 and the Chinese national standardGB16776.2. Referenced Documents2.1 ASTM Standards:2C 603 Test Method for Extrusion Rate and Application Lifeof Elastomeric SealantsC 639 Test Method for Rheological (Flow) Properti
6、es ofElastomeric SealantsC 661 Test Method for Indentation Hardness ofElastomeric-Type Sealants by Means of a DurometerC 679 Test Method for Tack-Free Time of ElastomericSealantsC 717 Terminology of Building Seals and SealantsC 792 Test Method for Effects of Heat Aging on WeightLoss, Cracking, and C
7、halking of Elastomeric SealantsC 794 Test Method for Adhesion-in-Peel of ElastomericJoint SealantsC 1087 Test Method for Determining Compatibility ofLiquid-Applied Sealants with Accessories Used in Struc-tural Glazing SystemsC 1135 Test Method for Determining Tensile AdhesionProperties of Structural
8、 SealantsC 1401 Guide for Structural Sealant GlazingC 1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusG 151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test Devices That Use Laboratory Light SourcesG 154 Practice for Operating Fluorescent Light Appa
9、ratusfor UV Exposure of Nonmetallic MaterialsG 155 Practice for Operating Xenon Arc Light Apparatusfor Exposure of Nonmetallic Materials2.2 European Organization for Technical Approvals Docu-ment:3ETAG No. 002 Guideline for European Technical Approvalfor Structural Sealant Glazing Systems2.3 Chinese
10、 National Standard:4GB 167761997 Structural Silicone Sealants for Building3. Terminology3.1 DefinitionsRefer to Terminology C 717 for definitionsof the following terms used in this specification: adhesivefailure, chemically curing sealant, cohesive failure, compatibil-ity, cure, elastomeric, glazing
11、, hardness, non-sag sealant,primer, sealant, shelf life, silicone sealant, structural sealant,substrate, and tooling.4. Significance and Use4.1 Not all sealants meeting this specification should bepresumed to be suitable for all applications and all substrates.This specification assists in selecting
12、 sealants that meet certainminimum standards of performance.4.2 Although this specification qualifies a sealant for use, itdoes not address the adhesion capability of the sealant for a1This specification is under the jurisdiction of ASTM Committee C24 onBuilding Seals and Sealants and is the direct
13、responsibility of Subcommittee C24.10on Specifications, Guides and Practices.Current edition approved Sept. 1, 2005. Published October 2005. Originallyapproved in 1991. Last previous edition approved in 2000 as C 1184 00ae1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcont
14、act ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from www.eota.be4Published May 15, 2005, Implemented August 1, 1997; www.nstn.org1Copyright ASTM International, 100 Barr Harbo
15、r Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.specific substrate nor the compatibility of the sealant with thematerials it contacts. Adhesion and compatibility characteris-tics required for specific substrates or finishes can be deter-mined by Test Method C 794 for adhesion a
16、nd Test MethodC 1087 for compatibility.4.3 To properly specify a sealant for the intended use whenusing this specification, it is essential that the applicable typeand use be included.5. Classification of Sealants5.1 A sealant qualifying under this specification shall beclassified as to type and use
17、 as given in 4.1.1-4.1.4.5.1.1 Type SSingle-component sealant.5.1.2 Type MMulticomponent sealant.5.1.3 Use GA sealant that meets the requirements of thisspecification when tested on a clear, uncoated float glasssubstrate.5.1.4 Use OA sealant that meets the requirements of thisspecification when test
18、ed on a substrate other than a clear,uncoated float glass substrate (for example, Use OGranite).6. Materials and Manufacture6.1 Furnish single-component sealants as a homogeneousmixture of a consistency suitable for application and within themanufacturers stated shelf life. Apply the sealant in acco
19、r-dance with the written recommendations of the sealant manu-facturer. The cured sealant shall be an elastomeric solid.6.2 Furnish multicomponent sealants in two or more com-ponents. Mix and apply the sealant in accordance with thewritten recommendations of the sealant manufacturer. Thecured sealant
20、 shall be an elastomeric solid.6.3 Furnish primer of the type required by, and apply inaccordance with, the written recommendations of the sealantmanufacturer.7. Requirements7.1 The physical, mechanical, and performance propertiesof the sealant shall conform to the requirements described inTable 1.7
21、.2 When a primer (see Note 1) is required by the sealantmanufacturer, all tests performed in accordance with thisspecification shall be performed wit the primer. When a primeris not required by the sealant manufacturer, all tests performedin accordance with this specification shall be performedwitho
22、ut a primer.NOTE 1The proper use of primers is described in Guide C 1401.7.3 The standard substrate for this specification is clear,uncoated float glass.7.4 Standard conditions referred to in this specification are atemperature of 23 6 2C (73.4 6 3.6F) and 506 5 % relativehumidity.8. Test Methods8.1
23、 Rheological PropertiesTest Method C 639, using testprocedures for Type II and IV sealants.8.2 ExtrudabilityTest Method C 603.8.3 HardnessTest Method C 661, using a Type A-2durometer.8.4 Heat AgingTest Method C 792, using a temperature of88 6 5C (190 6 10F).8.5 Tack-Free TimeTest Method C 679.8.6 Te
24、nsile AdhesionTest Method C 1135, using a rate ofpull of 12.7 mm (12 in.)/min. Determine the average ultimatetensile value for each group of five specimens prepared asdescribed in 8.6.1 and 8.6.2.8.6.1 Prepare, in accordance with Test Method C 1135, atotal of 25 specimens for testing, except that th
25、e distancebetween substrates will be 9.5 mm (38 in.).8.6.2 Cure all specimens for 21 days at standard conditions.Condition and test the specimens as described in 8.6.2.1-8.6.2.5.8.6.2.1 Test five specimens at standard conditions after theinitial curing period.8.6.2.2 Condition five specimens for1hat
26、886 5C (1906 10F) in a forced air oven. Test the specimens at 88 6 5C(190 6 10F).8.6.2.3 Condition five specimens for1hat296 2C (206 4F). Test the specimens at 296 2C (20 6 4F).8.6.2.4 Immerse five specimens in deionized or distilledwater at standard temperature for seven days. Test the speci-mens a
27、t standard conditions within 10 min after their removalfrom the water.8.6.2.5 Expose five specimens with the bond surface facingthe light source to either of the exposure conditions specifiedbelow in apparatus that conforms to the requirements definedin Practice C 1442. Because of differences in spe
28、ctral powerdistribution of the exposure sources (consult G 154 and G 155)and differences in test parameters, test results may differbetween the two types of tests. Choice of type of exposure shallbe by mutual agreement between the interested parties.NOTE 2Refer to Practice G 151 for full cautionary
29、guidance regardinglaboratory weathering of nonmetallic materials.(a)Fluorescent UV/Condensation ApparatusOperate thedevice in accordance with the procedure in Practice C 1442,Section 7.3 and expose the specimens for a minimum of 5,000h.(b)Xenon Arc Weathering DeviceOperate the device inaccordance wi
30、th the procedure in C 1442, Section 7.2. ExposeTABLE 1 Requirements for Physical, Mechanical andPerformance Qualities of the SealantProperty Requirement Test MethodRheologic, max C 639Vertical 4.8 mm (316 in.)Horizontal no deformationExtrudability, max 10 s C 603Hardness, Shore A 20-60 C 661Heat agi
31、ngWeight loss, max 10 %Cracking noneChalking noneTack-free time, max no transfer in 3 h C 679Tensile value, min C 1135Standard conditions: 345 kPa (50 psi)88C (190F) 345 kPa (50 psi)29C (20F) 345 kPa (50 psi)Water immersion 345 kPa (50 psi)5000 h weathering 345 kPa (50 psi) 8.6.2.5Shelf life, min 6
32、months 9.1C1184052specimens for a minimum of 5,000 h at the irradiance level of0.51 W/(m2 nm) at 340 nm. The radiant exposure is 9180kJ/(m2 nm) at 340 nm. To determine the exposure timerequired to obtain the same radiant exposure at other irradiancelevels specified in Practice C 1442, see Annex A1 i
33、n PracticeC 1442.NOTE 3The exposure duration shall be of sufficient length to producea detectable change of the property evaluated for a material known to givepoor performance in the application of interest.9. Shelf Life9.1 If it is desired to test shelf life of a structural sealant,then the test me
34、thods listed in Section 8 should be performedon sealant that has been stored to within 30 days of themanufacturers stated shelf life. All of the requirements ofTable 1 should be met.APPENDIX(Nonmandatory Information)X1. STRUCTURAL SILICONE SEALANT MODULUS OF ELASTICITYX1.1 GeneralX1.1.1 The purpose
35、of this appendix is to describe modulusconsiderations for a structural silicone sealant that is intendedfor a range of applications. Structural silicone sealants shouldbe designed for both strength and flexibility for specificapplications; this implies that the sealants modulus of elastic-ity should
36、 fall between a maximum and minimum value for aspecific application.X1.1.2 The modulus of elasticity of a material describes itselongation response to an applied stress, and therefore is ameasure of its flexibility, stiffness, or hardness. The term“modulus” used in this appendix refers to a sealants
37、 secantmodulus of elasticity; see Terminology C 717. Note that theunits of modulus and stress can be the same (such as poundsper square inch), but they represent different technical con-cepts. Because the modulus of a sealant is not constant, it iscustomary in the sealant industry to state both the
38、modulus andthe strain at which it was measured (for example, 99 kPa at12.5 % strain).X1.1.3 Structural silicone sealants are used to structurallyattach glass and other materials to a framing system; to transferloads applied to the glazing material to the framing system; andto accommodate anticipated
39、 movement between the glazedmaterials and the supporting framework. When selecting astructural sealant for a specific application, the design profes-sional must select a sealant that has the necessary strength toresist applied loads, but also has enough flexibility to accom-modate differential movem
40、ent.X1.1.4 Currently, structural silicone sealants are manufac-tured to have performance properties which allow a particularmaterial to be used in a wide variety of applications. If aparticular structural silicone sealant is to be used in a specificapplication, it must have a modulus which is also a
41、cceptablefor that application.X1.1.5 The modulus of a sealant may be a function (essen-tially linear) of temperature. It should be verified that themodulus will fall within the minimum and maximum criteriaover the anticipated service temperature range.X1.1.6 To adequately evaluate a sealant for a sp
42、ecificapplication, a stress/strain plot should be developed for thespecific project conditions utilizing Test Method C 1135. Whendeveloping the stress/strain plot, the test conditions (such assealant joint configuration or environmental conditioning)should be modified to correlate with the condition
43、s specified orpredicted for the specific specification. The application-specificstress/strain plots (developed using the average values for eachset of test assemblies as described in Test Method C 1135), incombination with the design criteria for the application, can beevaluated to determine if the
44、proposed sealant is appropriatefor the application.X1.2 Minimum ModulusX1.2.1 The minimum acceptable structural sealant modulus(softest, or highest acceptable flexibility) is based on thepremise that the sealant must be sufficiently stiff to retain thepanel without excessive deflection. The limiting
45、 case is whenthe sealant depth is stressed by negative (outward acting) windor other lateral loads up to its design load; even at that stress itmust not elongate beyond the practical limit of the designgeometry (such as the setting blocks supporting the weight ofthe panel).X1.3 Maximum ModulusX1.3.1
46、 The maximum acceptable modulus (hardest, or leastacceptable flexibility) is dictated by the requirement that thestructural sealant joint must have sufficient flexibility to re-spond to the wind strain or differential thermal movementbetween the panel and the supporting framework, withoutbeing stres
47、sed in shear in excess of the design parameters.C1184053ASTM 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
48、 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 every five years andif not revised, either reapproved or withdrawn. Your comments are invited either
49、 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 below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Indiv
