ASTM_C_681_-_14.pdf

Designation:C68114Standard Test Method forVolatility of Oil-and Resin-Based,Knife-Grade,ChannelGlazing Compounds1This standard is issued under the fixed designation C681;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the determination of thevolatility of oil-and resin-based,knife-grade,channel glazingcompounds.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The subcommittee with jurisdiction is not aware of anysimilar ISO standard.1.4 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 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:C717 Terminology of Building Seals and Sealants3.Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof the following terms:glazing,compound,channel,andstandard conditions.4.Summary of Test Method4.1 The channel glazing compound is placed into a taredaluminum dish and weighed.The test specimen is then placedinto an oven for a period of 3 h.After cooling,the testspecimen is reweighed and the percent of volatile mattercalculated.5.Significance and Use5.1 This test method provides a guide as to the amount ofvolatile matter that will be emitted from a channel glazingcompound when tested by this test method.6.Apparatus6.1 Cabinet or Room,capable of maintaining standardconditions of temperature and relative humidity as defined inC717 for extended periods of time.6.2 Forced-Draft Oven,capable of maintaining a tempera-ture of 220 6 5F(104 6 3C)for extended periods of time.6.3 Dish,aluminum foil,2.5 in.(64 mm)in diameter by0.75 in.(19 mm)deep,with a flat bottom.6.4 Balance,laboratory analytical type.6.5 Steel Spatula or Putty Knife,with a blade about 4 in.(102 mm)long and 0.75 in.(19 mm)wide.6.6 Desiccator.7.Procedure7.1 Condition a sample of channel glazing compound in atightly closed container 24 h at standard conditions prior totesting.Mix the channel glazing compound thoroughly with aspatula to ensure uniformity of the sample to be tested.7.2 Weigh the aluminum foil dish to the nearest 0.01 g andrecord the tare weight.7.3 Transfer approximately 3 to 5 g of the compound intothe tared aluminum foil dish,using the spatula,and spread thecompound uniformly over the bottom of the dish.7.4 Weigh the dish containing the compound quickly andaccurately to the nearest 0.01 g.Record the combined weightof the dish and the compound.7.5 Place the dish containing the compound into an ovencontrolled at 220 6 5F(104 6 3C)for a period of 3 h,coolin desiccator at standard conditions for 1 h,weigh accurately tothe nearest 0.01 g,and record the weight of the dish plus thesample after heating.8.Calculation8.1 Calculate the percent of volatile matter,V,in the channelglazing compound as follows:V 5A 2 BC3100(1)1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved Jan.1,2014.Published February 2014.Originallyapproved in 1971.Last previous edition approved in 2009 as C681 03(2009).DOI:10.1520/C0681-14.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 where:A=weight of the dish plus the sample,g,B=weight of the dish plus the sample after heating,g,andC=sample weight,g.9.Report9.1 Report the percent of volatile matter,calculated to thenearest 0.5%.10.Precision10.1 The multioperator-day precision for the volatility testis 60.5%.11.Keywords11.1 channel glazing compound;knife grade;volatilityASTM 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 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 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 vie