ISO INTERNATIONAL STANDARD 4629-2 First edition 2016-06-01 Binders for paints and varnishes Determination of hydroxyl value - Part 2: Titrimetric method using a catalyst Liants pour peintures et vernis - Détermination de I'indice d'hydroxyle - Partie 2: Methode titrimétrique utilisant un catalyseur Reference number IS0 4629-2:2016(E) ISO International Organization for Standardization @ IS0 2016 HEJIANG INSTOFSTANDARDIZATIONC15956617 ed without license from IHS IS0 4629-2:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org PrganizationforStandardization ensee-ZHEJIANG INST.OF STANDARDIzARoISQ16- All rights reserved Not for Resale, 2016/8/17 07:00:56 etworking permitted without license from IHS IS0 4629-2:2016(E) Contents Page Foreword ..iv Introduction. ... 1 Scope.. 2 Normative references 3 Terms and definitions 4 Principle ..1 5 Reagents. ..2 6 Apparatus. 7 Sampling. ..3 8 Procedure. ..3 8.1 Number of determinations 8.2 Testportion .3 8.3 Determination .3 8.4 Blanktest. ..4 8.5 Determination of acid value .4 9 Expression of results ..4 10 Precision 10.1 Repeatability ..4 10.2 Reproducibility .4 11 Test report .5 Bibliography 6 iii see=ZHEJIANG INST OF STANDARDIZATION C15956617 vided by IHS under lic ed without license from IHS Not for Resale, 2016/8/17 07:00:56