ISO INTERNATIONAL STANDARD 21318 First edition 2007-02-01 Plastics Epoxy resins Determination of electrical conductivity of aqueous resin extracts PlastiquesRésinesépoxyDeterminationdelaconductivite électriquedes extraitsaqueux deresine Referencenumber ISO 21318:2007(E) @ISO 2007 ISO21318:2007(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 downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat 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 infom the Central Secretariat at the address given below. ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or 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 2007 - All rights reserved ISO21318:2007(E) Foreword Iso (the International Organization for Standardization)is a worldwide federation of national standards bodies (iSO member bodies). The work of preparing International Standards is normally carried out through ISO non-governmental, in liaison with IsO, also take part in the work. IsoO collaborates closely y with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards 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 castinga vote Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 21318 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. ISO 2007 - All rights reserved ili ISO21318:2007(E) Introduction Where epoxy resins are used as insulation for electronic devices, ionic impurities such as chloride, sodium and catalyst residues present in the epoxy resin can cause failure of the device. Instead of determining these electrical conductivity of a resin extract obtained by extraction of the resin with water at an elevated temperature. Because of its practical usage and simplicity, this method is becoming widely used in the quality control of epoxy resins for electronic insulation applications. iv @ ISO 2007-All rights reserved INTERNATIONALSTANDARD ISO21318:2007(E) Plastics Epoxy resins Determination of electrical conductivity ofagueous resinextracts SAFETYSTATEMENT-Personsusingthisdocument shouldbefamiliarwithnormal laboratory associated with its use.It is the responsibility of the userto establish appropriate safety and health practices and toensurecompliancewithany regulatoryrequirements. Scope This International Standard specifies a method for the determination of the electrical conductivity of an aqueous extract obtained by extraction of an epoxy resin with water at 95 °C. The method is applicable only to epoxy resins that are in the molten state at the extraction temperature (95 C). The method is important for epoxy resins which are used as insulation materials for electronic devices. The 2 Mater