BS ISO 25761-2014 Plastics Polyols for use in the production of polyurethanes Determination of basicity (total amine value) expressed as percent nitrogen《塑料 聚氨酯的生产用多元醇 氮百分比表示的碱度(总胺.pdf
《BS ISO 25761-2014 Plastics Polyols for use in the production of polyurethanes Determination of basicity (total amine value) expressed as percent nitrogen《塑料 聚氨酯的生产用多元醇 氮百分比表示的碱度(总胺.pdf》由会员分享,可在线阅读,更多相关《BS ISO 25761-2014 Plastics Polyols for use in the production of polyurethanes Determination of basicity (total amine value) expressed as percent nitrogen《塑料 聚氨酯的生产用多元醇 氮百分比表示的碱度(总胺.pdf(18页珍藏版)》请在麦多课文档分享上搜索。
1、BSI Standards PublicationBS ISO 25761:2014Plastics Polyols for use in theproduction of polyurethanes Determination of basicity(total amine value), expressedas percent nitrogenBS ISO 25761:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 25761:2014. It super
2、sedes BS ISO 25761:2008 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does
3、 not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 81991 9ICS 83.080.10Compliance with a British Standard cannot confer immunity from legal
4、 obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 25761:2014 ISO 2014Plastics Polyols for use in the production of polyurethanes Determina
5、tion of basicity (total amine value), expressed as percent nitrogenPlastiques Polyalcools utiliss pour la production de polyurthannes Dtermination de la basicit (valeur totale damines) en pourcentage dazoteINTERNATIONAL STANDARDISO25761Second edition2014-03-01Reference numberISO 25761:2014(E)BS ISO
6、25761:2014ISO 25761:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All 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 postin
7、g on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso
8、.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 25761:2014ISO 25761:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Sampling 26 Apparatus . 27 Interference . 28 Reagents 29 Procedure. 310 Exp
9、ression of results 411 Precision and bias . 411.1 General . 411.2 Precision . 511.3 Bias 512 Test report . 5Annex A (informative) Determination of the factor F for 0,1 mol/l perchloric acid in acetic acid 6Bibliography 7BS ISO 25761:2014ISO 25761:2014(E)ForewordISO (the International Organization fo
10、r Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the
11、 right to be represented on that committee. International organizations, governmental and non-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.The proced
12、ures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial
13、 rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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. Details of any patent rights id
14、entified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanatio
15、n on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document
16、is ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials.This second edition cancels and replaces the first edition (ISO 25761:2008), which has been technically revised.iv ISO 2014 All rights reservedBS ISO 25761:2014ISO 25761:2014(E)IntroductionPolyurethanes are produced by the catalysed
17、 reaction of isocyanates with polyols. The basicity of the polyol employed affects the rate of reaction and speed of cure of the product. It is therefore necessary to determine the basicity in order to predict reactivity and monitor product quality. ISO 2014 All rights reserved vBS ISO 25761:2014BS
18、ISO 25761:2014Plastics Polyols for use in the production of polyurethanes Determination of basicity (total amine value), expressed as percent nitrogenSAFETY STATEMENT Persons using this document should be familiar with normal laboratory practice, if applicable. This document does not purport to addr
19、ess all of the safety concerns, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory requirements.1 ScopeThe method specified in this International Standard measures the basic constitue
20、nts in polyols that are soluble in glacial acetic acid and reactive with perchloric acid. Samples containing 0,3 % to 10 % of nitrogen have been evaluated by this method. The method is applicable to amine-based polyols, polyether polyols and polyether polyol blends that are used in polyurethane reac
21、tions. The results are measures of batch-to-batch uniformity and may be used to estimate reactivity in polyurethane reactions.It is also permissible to express the results in equivalents of base per gram of sample.NOTE This method is technically equivalent to that in ASTM D 6979.2 Normative referenc
22、esThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1042, Laboratory glassware One-mark volumetr
23、ic flasksISO 4788, Laboratory glassware Graduated measuring cylindersISO 3696, Water for analytical laboratory use Specification and test methodsISO 6353-1, Reagents for chemical analysis Part 1: General test methodsISO 6353-2, Reagents for chemical analysis Part 2: Specifications First seriesISO 63
24、53-3, Reagents for chemical analysis Part 3: Specifications Second series3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1polyolpolymer based on ethylene oxide and/or propylene oxide which contains two or more hydroxyl groups3.2polyurethanepolyme
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