1、Designation: D 269 97 (Reapproved 2006)Standard Test Method forInsoluble Matter in Rosin and Rosin Derivatives1This standard is issued under the fixed designation D 269; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast 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 covers the determination of the amountof insoluble matter in rosin and rosin derivatives as described
3、in Terminology D 804.1.2 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 stan
4、dard 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:2D 804 Terminology Relating to Naval Stores, Including TallOil and Related ProductsE11 Specification for Wire Cloth and Sieves
5、for TestingPurposes3. 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
6、 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 s
7、oluble 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 stir
8、ring 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 Laborat
9、ory 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
10、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.NOTE 1Always use tweezers when handling the pre-cut screen.6.2 Weig
11、h 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
12、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 usuallysufficient), coo
13、l in a desiccator, and weigh. Record the weightof the dry contaminated screen to the nearest 0.0001 g.7. Calculationweight contaminated screenPercent insolubles 52weight clean screen.weight of sample3 1001This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,
14、Materials, and Applications and is the direct responsibility ofSubcommittee D01.34 on Naval Stores.Current edition approved Nov. 1, 2006. Published November 2006. Originallyapproved in 1927. Last previous edition approved in 2002 as D 269 97 (2002).2For referenced ASTM standards, visit the ASTM webs
15、ite, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Stat
16、es.8. 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 specific
17、ation 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 are expressly advised that determination of the validity of any
18、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 inv
19、ited 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
20、 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).D 269 97 (2006)2
