ASTM_D_2371_-_85_2010.pdf

Designation:D237185(Reapproved 2010)Standard Test Method forPigment Content of Solvent-Reducible Paints1This standard is issued under the fixed designation D2371;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This test method covers the procedure for the quantita-tive separation of the vehicle from the pigment in solvent-reducible coatings.1.2 This test method has been proven to be applicable to thefollowing types of paints:white linseed oil outside house paint,white soya and phthalic alkyd enamel,white linseed o-phthalicalkyd enamel,red lead primer,zinc chromate primer,flat whiteinside enamel,white epoxy enamel,white vinyl toluenemodified alkyd,and white amino modified baking enamel.It isconsidered to be applicable to most solvent-reducible paints.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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.Specific hazardstatements are given in Section 6.2.Referenced Documents2.1 ASTM Standards:2D2698 Test Method for Determination of the Pigment Con-tent of Solvent-Reducible Paints by High-Speed Centri-fuging3.Significance and Use3.1 This test method is suitable for setting specifications forthe pigment content of solvent-reducible paints as well as formonitoring manufacturing quality control.3.2 This test method provides the isolated pigment fractionfrom solvent-reducible paints that may be used for pigmentanalysis.4.Apparatus4.1 Centrifuge,explosion-proof,capable of developing1000 to 2000 g.NOTE1The centrifuge should be equipped with a suitable head to takethe proper size trunnion cups necessary for use of the 90-mL tubes or120-mL(4-oz)bottles.A two,four,or six-place head can be used with thebottles and an eight-place head can be used with the tubes.4.2 Centrifuge Tube,90-mL,heavy-walled.In place of the90-mL centrifuge tube a 120-mL(4-oz)screw cap bottle withvinyl-lined screw cap may be used.34.3 Laboratory Oven,vented and capable of maintaining atemperature of 105 6 2C.4.4 Syringe,5-mL.4.5 Water Bath.5.Solvents5.1 Ethyl Ether or Petroleum Ether:(WarningSee 6.1).5.2 Extraction MixtureMix 10 volumes of ethyl ether,6volumes of benzene or toluene,4 volumes of methyl alcohol,and 1 volume of acetone(WarningSee 6.2,6.3,and 6.4).6.Hazards6.1 Ethyl Ether and Petroleum Ether Flammable.Vapor isharmful.May be fatal if inhaled or swallowed.Use only withadequate ventilation.Avoid prolonged contact with skin.Avoidcontact with flame,hot surface,or sparks.Do not get in eyes,on skin,or on clothing.Refer to suppliers Material SafetyData Sheet.6.2 AcetoneFlammable.Vapor is harmful.May be fatal ifinhaled or swallowed.Use only with adequate ventilation.1This 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 Dec.1,2010.Published December 2010.Originallyapproved in 1965.Last previous edition approved in 2005 as D2371 85(2005).DOI:10.1520/D2371-85R10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The sole source of supply of bottles and caps,Cat.No.S9185C,4-oz bottle,known to the committee at this time is Sargent Welch Scientific,7300 N.LinderAve.,Skokie,IL 60076.If you are aware of alternative suppliers,please provide thisinformation to ASTM International Headquarters.Your comments will receivecareful consideration at a meeting of the responsible technical committee,1whichyou may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Avoid prolonged contact with skin.Avoid contact with flame,hot surface,or sparks.Do not get in eyes,on skin,or onclothing.Refer to suppliers Material Safety Data Sheet.6.3 Methyl AlcoholFlammable.May be fatal or causeblindness if swallowed.Cannot be made nonpoisonous.Harm-ful if inhaled.Keep away from heat,sparks,or open flame.Avoid breathing vapor.Use only with adequate ventilation.Refer to suppliers Material Safety Data Sheet.6.4 Benzene has been declared carcinogenic.6.4.1 Benzene and TolueneFlammable.Vapors and liquidare harmful and may be fatal if swallowed.Keep away fromheat,sparks,