ASTM_D_4706_-_93_1998.pdf

Designation:D 4706 93(Reapproved 1998)Standard Test Method forQualitative Determination of Methylol Group in PhenolicResins1This standard is issued under the fixed designation D 4706;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure to determinequalitatively the presence of methylol group in phenol-formaldehyde resins.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.Summary of Test Method2.1 This test method of qualitatively determining the pres-ence of methylol groups in a phenol resin uses the reaction offerric chloride with the methylol group to produce a blue colorat room temperature.3.Significance and Use3.1 This test method provides a fast and simple method fordetermining the presence of methylol group for quality controltesting.4.Apparatus4.1 Test tube,6 by 1-in.(152 by 25-mm)glass.4.2 Acetone,reagent grade.4.3 Ferric chloride,5%aqueous solution.4.4 Balance.5.Procedure5.1 Place 0.1 g of the specimen under test in a test tube.5.2 Add 10 mL of acetone.5.3 Shake and dissolve specimen.5.4 Add two drops of 0.5%ferric chloride solution andswirl.5.5 Observe color,yellow or blue.6.Report6.1 Report the following information:6.1.1 Yellow equals methylol group absent.6.1.2 Blue equals methylol group present.7.Precision and Bias7.1 Precision and bias do not apply since this is a qualitativetest method that is recorded by a color change.8.Keywords8.1 ferric chloride;methylol group content;phenol-formaldehyde(PF)plastics;plastics;general;and resins(sub-heading phenolic).ASTM 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 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 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 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,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).1This test method is under the jurisdiction of ASTM Committee D-1 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.33 on Polymers and Resins.Current edition approved April 15,1993.Published June 1993.Originallypublished as D 4706 87.Last previous edition D 4706 87.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.