ISO INTERNATIONAL STANDARD 4576 Second edition 1996-05-15 Plastics - Polymer dispersions - Determination of sieve residue (gross particle and coagulum content) Plastiques Dispersions de polymeres — Détermination du residu par tamisage (teneur en grains et en coagulum) ISO Reference number ISO45761996(E) pyright International Organization for Standardizatior Not for Resale ISO4576:1996(E) Foreword ISO (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (IsO member bodies). The work of preparing International Standards is normaly carried out through Iso which a technical committee has been established has the right to be rep- on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are cir- Standard requires approval by at least 75 % of the member bodies casting a vote International Standard ISO 4576 was prepared by Technical Committee ISO/TC61,Plastics,SubcommitteeSC9,Thermoplasticmaterials This second edition cancels and replaces the first edition (ISO 4576:1978), which has been technically revised. ISO1996 All rights reserved Unless otherwise specified, no part of this publication may be repro- duced or utilized in any form or by any means, electronic or mechanical, including photo- copying and microfilm, without permission in writing from the publisher International Organization for Standardization Case Postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland ii Copyightlntenatinal Oorganization for Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO4576:1996(E) INTERNATIONAL STANDARD @ISO Plastics Polymer dispersions Determination of sieve residue (gross particle and coagulum content) Scope 3 Principle This International Standard specifies a method of The polymer dispersion is diluted with a specified vol- determiningthesieveresidue(grossparticleand ume of deionized water and filtered through a metal coagulum content) of polymer dispersions, i.e. of par- gauze of a specified mesh size. The residue is washed ticles much greater in diameter (for example 10 or 100 with deionized water and then dried and weighed. times)thanthemeandiameteroftheotherparticies. This determination is carried out by sieve analysis. The sieves useddepend onthe type of dispersion under test and are in consequence to be specified, or agreed Reagents upon by the interested parties, for each dispersion or group of closely related dispersions. During the analysis, use only reagents of recognized analytical grade, and deionized water or water of ThisInternationalStandardrefersonlyto coagulum type content. Skinned material and fragments of skin equivalent purity. larger than 5 mm are avoided while taking the sample (see clause6) 4.1 Surfactants, for stabilizing the polymer disper- sion during testing (if necessary), as agreed between the interested parties. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of 5 Apparatus thisInternational Standard.Atthe time of publication the editions indicated were valid. All standards are subject to revision, and parties to agreements based 5.1 Test sieves (series of metal gauzes, preferably onthisInternational Standard are encouragedtoin stainless steel), as specified in IS0 3310-1, in the form vestigatethepossibilityofapplyingthemostrecent of discs or squares, including at least meshes with the editionsofthestandardsindicatedbelow.Members following aperture sizes: of IEC and ISO maintain registers of currently valid In- ternational Standards 45 μm, 63 μm, 90 μm, 125 μm and 180 μm ISO123:1985,Rubberlatex-Sampling Non-metallic gauzes may be used, but this shall be indicated in the test report iSO842:1984,Raw materials forpaintsandvarnishes Sampling 5.2 Equipment to support the wire gauzes, such ISO3310-1.1990,Test sieves Technical require- ments and testing - Part 1