1、Designation: C681 03 (Reapproved 2009)C681 14Standard 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
2、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 the volatility of oil- and resin-based,
3、knife-grade, channel glazingcompounds.1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for informationonly.mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 The subcommittee
4、 with jurisdiction is not aware of any similar ISO standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicabi
5、lity of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:C717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitions of the following terms: glazing, compound. compound, channel,and standard conditions.3.2 Descript
6、ion of TermRefer to Terminology C717 for the description of the following term: channel.4. Summary of Test Method4.1 The channel glazing compound is placed into a tared aluminum dish and weighed. The test specimen is then placed into anoven for a period of 3 h. After cooling, the test specimen is re
7、weighed and the percent of volatile matter calculated.5. Significance and Use5.1 This test method provides a guide as to the amount of volatile matter that will be emitted from a channel glazing compoundwhen tested by this test method.6. Apparatus6.1 Cabinet or Room, capable of maintaining a tempera
8、ture of 73.463.6F (2362C) at 50standard conditions of temperatureand relative humidity as defined in C717 6 5 % relative humidity for extended periods of time.6.2 Forced-Draft Oven, capable of maintaining a temperature of 220 6 5F (104 6 3C) for extended periods of time.6.3 Dish, aluminum foil, 2.5
9、in. (64 mm) in diameter by 0.75 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.1 This test method is under the jurisdiction of ASTM Committee C24 on Buildin
10、g Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on GeneralTest Methods.Current edition approved Jan. 1, 2009Jan. 1, 2014. Published March 2009February 2014. Originally approved in 1971. Last previous edition approved in 20032009 asC681 03.C681 03 (2009). DOI: 10.1520/C06
11、81-03R09.10.1520/C0681-14.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends th
12、at users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17. Procedure7.1 Condit
13、ion a sample of channel glazing compound in a tightly closed container 24 h at 73.4 6 3.6F (23 6 2C) standardconditions prior to testing. Mix the channel glazing compound thoroughly with a spatula to ensure uniformity of the sample to betested.7.2 Weigh the aluminum foil dish to the nearest 0.01 g a
14、nd record the tare weight.7.3 Transfer approximately 3 to 5 g of the compound into the 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 and accurately to the nearest 0.01 g. Record the combine
15、d weight of thedish and the compound.7.5 Place the dish containing the compound into an oven controlled at 220 6 5F (104 6 3C) for a period of 3 h, cool indesiccator at 73.4 6 3.6F (23 6 2C) standard conditions for 1 h, weigh accurately to the nearest 0.01 g, and record the weightof the dish plus th
16、e sample after heating.8. Calculation8.1 Calculate the percent of volatile matter, V, in the channel glazing compound as follows:V5A2BC 3100 (1)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 per
17、cent of volatile matter, calculated to the nearest 0.5 %.10. Precision10.1 The multioperator-day precision for the volatility test is 60.5 %.11. Keywords11.1 channel glazing compound; knife grade; volatilityASTM International takes no position respecting the validity of any patent rights asserted in
18、 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 re
19、sponsible 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 caref
20、ul 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
21、, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C681 142
