ASTM_D_269_-_97_2015.pdf

Designation:D26997(Reapproved 2015)Standard Test Method forInsoluble Matter in Rosin and Rosin Derivatives1This standard is issued under the fixed designation D269;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 covers the determination of the amountof insoluble matter in rosin and rosin derivatives as describedin Terminology D804.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety problems,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:2D804 Terminology Relating to Pine Chemicals,IncludingTall Oil and Related ProductsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Significance and Use3.1 Rosin,particularly gum and wood rosin,occasionallycontains small amounts of contamination such as sand,dirt orbark.Rosin derivatives occasionally contain traces of insolublematerial as a result of the raw materials used in their productionor they may be generated during the production process.In allinstances the presence of such insoluble material should beminimal.This test method describes a rapid and reliableprocedure for determining the amount of such insoluble matter.It is based on the knowledge that rosin and most of itsderivatives are soluble in numerous organic solvents whereasmost common contaminants are not.It is especially useful forinternal quality control rather than sales specifications.4.Apparatus4.1 Beaker,800 mL.4.2 Magnetic Stirring Hot Plate with Polytetrafluoroethyl-ene(PTFE)Stirbar,or hot plate with manual stirring rod.4.3 Precut Stainless Steel Circular Screen,325 mesh with0.0014-in.wire diameter.(44-m openings)as described inSpecification E11.4.4 Two-Piece Filter Apparatus,appropriate to hold thestainless steel screens without leaking.4.5 Analytical Balance,capable of weighing 0.0001 g.4.6 Laboratory Tweezers.4.7 Forced Draft Oven.5.Reagents5.1 Clean Toluene,Hexane,Mineral Spirits,or other suit-able solvent for the specific material to be checked in,asagreed upon between the customer and the supplier.6.Procedure6.1 Rinse the pre-cut screen thoroughly with the solvent toclean it before use.6.1.1 Dry the clean screen at 105 to 110C for 30 min,coolin a desiccator,and weigh.6.1.2 Record the weight of the dry screen to the nearest0.0001 g.6.1.3 Place the screen in the filter apparatus and secure it toprevent leakage.NOTE1Always use tweezers when handling the pre-cut screen.6.2 Weigh 100 6 0.1 g of freshly powdered material to betested into an 800-mL beaker.Add 150 mL of solvent.Place aPTFE-coated magnetic stir bar into the beaker,and place thebeaker on a hot plate.Heat and stir the material until it iscompletely dissolved.Do not boil the solvent.6.3 Immediately pour the solution through the screen.Rinsethe beaker and filter apparatus three times with additional hotsolvent.6.4 Disassemble the filter apparatus,remove the screen,andplace it in a forced draft oven,contaminated side up.Dry thescreen to constant weight at 105 to 110C.(1 h is usually1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.34 on Pine Chemicals and Hydrocarbon Resins.Current edition approved Dec.1,2015.Published December 2015.Originallyapproved in 1927.Last previous edition approved in 2011 as D269 97(2011).DOI:10.1520/D0269-97R15.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 sufficient),cool in a desiccator,and weigh.Record the weightof the dry contaminated screen to the nearest 0.0001 g.7.Calculationweight contaminated screen(1)Percent insolubles 52 weight clean screen.weight of sample31008.Report8.1 Report the percent insoluble matter to the nearest0.01%.9.Precision and Bias9.1 It is not practical to measure the precision and bias ofthe procedure in this test method because this test method isprimarily used for internal quality control purposes rather thanfor customer specification purposes.10.Keywords10.1 insoluble;rosin;rosin derivativesASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard