ISO INTERNATIONAL STANDARD 14898 First edition 1999-10-15 Plastics Aromatic isocyanates for use in the production of polyurethane - Determination of acidity Plastiques Isocyanates aromatiques utilisés pour la production de polyuréthanneDétermination de I'acidite ISO Reference number ISO 14898:1999(E) by IHS under lic itted without license from IHS Not for Resale ISO 14898:1999(E) Contents 1 Scope 2 Normative references 3 Terms and definitions 4 Principle. 5 Application 6Interference 7Testconditions 8 Reagents 2 9 Apparatus 10 Method A: aromatic isocyanates with moderate to high acidity (> 100 μg/g).... .3 11 Method B: aromatic isocyanates with low acidity (< 100 μg/g).. 5 Bibliography @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic International OrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland Copyright International Organization for Standardization Not for Resale ISO 14898:1999(E) @ISO Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO memberbodies).The workofpreparingInternationalStandardsis normallycarried outthroughISOtechnical committees. Each member body interested in a subject for which a technical committee has been established has therighttoberepresented onthat committee.International organizations,governmental andnon-governmental,in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 least 75 % of the member bodies casting a vote International Standard ISO 14898 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. ii