ASTM D5325-2003 Standard Test Method for Determination of Weight Percent Volatile Content of Water-Borne Aerosol Paints《测定水基型(压力罐装)喷雾涂料中挥发物重量百分比的标准试验方法》.pdf

1、Designation: D 5325 03Standard Test Method forDetermination of Weight Percent Volatile Content of Water-Borne Aerosol Paints1This standard is issued under the fixed designation D 5325; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision

2、, 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.1. Scope1.1 This test method is for the determination of the weightpercent volatile content of water-borne paints i

3、n aerosols.1.2 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. R

4、eferenced Documents2.1 ASTM Standards:D 2369 Test Method for Volatile Content of Coatings2D 3792 Test Method for Water Content of Coatings byDirect Injection into a Gas Chromatograph2D 4017 Test Method for Water in Paints and Paint Materialsby Karl Fischer Method2E 180 Practice for Determining the P

5、recision of ASTMMethods for Analysis and Testing of Industrial and Spe-cialty Chemicals32.2 Other Standard:Method 36 Determination of Percent Volatile Organic Com-pounds (VOC) in Water Based Aerosol Paints43. Summary of Test Method3.1 The propellant is released from the can and the contentremaining

6、is tested for percent water and nonvolatiles.4. Significance and Use4.1 Calculation of the weight percent volatile organic con-tent of water-borne paints, requires that the water content beknown. This test method provides a direct way to determine theweight percent volatile organic matter of water-b

7、orne aerosolpaints minus the matter content. This test method is modeledafter Method 364.5. Apparatus5.1 Freezer.5.2 Ice Pick.5.3 Hammer.5.4 Applicator Sticks.5.5 Masking Tape.5.6 Tin Snips or Metal Cutter.5.7 Shaker, similar to Eberbach shaker in Fig. 1.6. Procedure6.1 Preparation of Aerosol Conten

8、ts for Analysis:6.1.1 Mix the aerosol paint container thoroughly for about15 min, using a shaker similar to the Eberbach shaker shown inFig. 1, at the low speed setting. It is essential that the samplesbe well mixed to obtain valid results.6.1.2 Remove the cap and actuator from the can. Put the capo

9、n the can and weigh the can to 0.01 g.6.1.3 Place the can in an upside down position in a freezerfor2hatatemperature that is 0C.6.1.4 Put the can upside down in a fume hood. Puncture thebottom of the can near the edge with a very sharp ice pick.Slowly remove the ice pick from the hole. Leave the hol

10、euncovered for about 12 to 16 h to allow most of the propellantto escape.6.1.5 Enlarge the hole slightly by tapping the ice pickfurther into the can. Swirl the can gently for 1 to 2 min toremove any remaining propellant.6.1.6 Wipe off any condensate that may have accumulatedon the can. Weigh the can

11、 to 60.01 g.6.1.7 Plug the hole with a small applicator stick (about12cm long) and then place masking tape over the plugged hole.6.1.8 Place the can on the shaker in a position so that thehole is at the highest possible position to prevent leakage ofcontents. Shake the can for about 15 min at the lo

12、w speedsetting.6.1.9 Cut the bottom of the can using a metal cutter. Stir thecontents with a spatula, then transfer the contents to a pint canwith lid.6.1.10 Rinse the aerosol can, agitators, and bottom severaltimes using solvent. Allow the can, agitators, and the bottom todry. Weigh to 60.01 g.1Thi

13、s test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.Current edition approved Jan. 10, 2003. Published March 2003. Originallyap

14、proved in 1992. Last previous edition approved in 1997 as D 5325 - 92 (1997).2Annual Book of ASTM Standards, Vol 06.01.3Annual Book of ASTM Standards, Vol 15.05.4Bay Area Air Quality Management District, (BAAQMD) Manual of Proce-dures, Vol III, 939 Ellis St., San Francisco, CA 94109.1Copyright ASTM

15、International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Calculations7.1 Calculate the weight percent nonvolatile content (NV),of the paint in accordance with Test Method D 2369.7.2 Calculate the total weight percent nonvolatile content(TNV), in the aeros

16、ol can as follows:TNV,%5NV! W5!W43 100 (1)where:W4=W1W3andW5=W2W3:W1= total weight of aerosol container plus contents, g,W2= total weight of aerosol container minus propellant, g,W3= empty weight of aerosol container, g,W4= contents including propellant, g, andW5= contents minus propellant, g.7.3 Th

17、e total volatile percent (TV) in the aerosol containermay be calculated by difference as follows:TV,%5 100 2 TNV (2).7.4 Determine the water content of the coating in accor-dance with Test Method D 3792 or Test Method D 4017.7.5 The weight percent volatile content (VC), equals totalvolatile percent

18、TV, minus percent of water.7.6 The percent of grams of volatile content/grams of solidsequalsVCTNV.8. Precision and Bias8.1 PrecisionEstimates are based on an interlaboratorystudy in which 1 operator in each of 5 laboratories analyzed induplicate on 2 different days 1 sample of a water-borne aerosol

19、containing 69 to 72 % organic volatiles. The coatings werecommercially supplied. The results were analyzed in accor-dance with Practice E 180. The within laboratory coefficient ofvariation was found to be 1.67 % relative at 9 df and thebetween laboratory coefficient of variation was 2.14 % relativea

20、t 7 df. Based on these coefficients, the following criteriashould be used for judging the acceptability of results at the95 % confidence level.8.1.1 RepeatabilityTwo results, each the mean of dupli-cate determinations, obtained by the same operator on differentdays should be considered suspect if th

21、ey differ by more than5.36 % relative.8.1.2 ReproducibilityTwo results each the mean of dupli-cate determinations obtained by operators in different labora-tories, should be considered suspect if they differ by more than7.16 %.8.2 BiasBias cannot be determined because there are noaccepted standards

22、for weight percent volatile content ofwater-borne aerosol paints.9. Keywords9.1 aerosols; volatile content; water-borne paintsASTM 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 e

23、xpressly 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 rev

24、ised, 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 m

25、ay 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. 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).FIG. 1 Aerosol Can on Eberbach ShakerD5325032