ISO INTERNATIONAL STANDARD 11402 Second edition 2004-03-15 Phenolic, amino and condensation resins Determination of free- formaldehyde content Resinesphenoliques,aminiquesetdecondensationDosagedu formaldehyde libre Reference number ISO 11402:2004(E) ISO @ISO 2004 ISO11402:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2004 - All rights reserved ISO11402:2004(E) Contents Page Foreword. 1 Scope .1 2 Normativereferences. 3 Terms and definitions. 4 4.1 General 4.2 Hydroxylaminehydrochlorideprocedure. 4.3 Sulfite procedure... 4.4 KCN procedure.. 5 Test report.. .10 Annex A (informative) Suitability of the procedures for different types of resin.. .11 Annex B (informative) Removal of Hg2+ and cN-from mercury and cyanide residues.. 12 @ ISo 2004 All rights reserved ili ISO 11402:2004(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies non-governmental, in liaison with IsO, also take part in the work. Iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75%of the member bodies casting a vote rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 11402 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. This second edition cancels and replaces the first edition (IsO 11402:1993), as well as IsO 9020:1994 and ISO 9020 and the hydroxylamine hydrochloride procedure from ISO 9397. @ ISO 2004 All rights reserved INTERNATIONAL STANDARD ISO11402:2004(E) Phenolic, amino and condensation resins Determination of free-formaldehyde content 1 Scope This International Standard specifies three methods for determining the free-formaldehyde content in the following: a) Phenolic resins, by potentiometric titration in aqueous or organic solution (hydroxylamine hydrochloride procedure). The method is applicable to resins with free-formaldehyde contents up to and including 15 % by mass.Forfree-formaldehyde contentsbetween15%by mass and 30%by mass,itmaybe necessary to adjust the concentrations of the standard volumetric solutions used accordingly. b) Amino resins and furan resins (sulfite procedure). The method is applicable to resins resulting from the polycondensation of urea and melamine with formaldehyde and to furan resins resulting from the polycondensation of furfuryl alcohol with formaldehyde without further modification. Condensation resins (KCN procedure), including urea resins, furan resins, melamine resins and c) phenolic resins, as well as combinations and modifications of these resins. The purpose of this International Standard is to establish recognized and useful determination procedures (for instance in order to check whether official regulations on the handling of hazardous workplace materials are observed). As far as possible, all formaldehyde-cont