DIN EN ISO 14896-2009 Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896 2009) English version of DIN EN ISO 14896 2009-07《塑料 聚氨酯原材料 异氰酸酯的测定(ISO.pdf
《DIN EN ISO 14896-2009 Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896 2009) English version of DIN EN ISO 14896 2009-07《塑料 聚氨酯原材料 异氰酸酯的测定(ISO.pdf》由会员分享,可在线阅读,更多相关《DIN EN ISO 14896-2009 Plastics - Polyurethane raw materials - Determination of isocyanate content (ISO 14896 2009) English version of DIN EN ISO 14896 2009-07《塑料 聚氨酯原材料 异氰酸酯的测定(ISO.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、July 2009DEUTSCHE NORM English price group 11No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83.080.20!$XC%“1533202www
2、.din.deDDIN EN ISO 14896Plastics Polyurethane raw materials Determination of isocyanate content (ISO 14896:2009)English version of DIN EN ISO 14896:2009-07Kunststoffe Polyurethanrohstoffe Bestimmung des Isocyanatanteils (ISO 14896:2009)Englische Fassung DIN EN ISO 14896:2009-07SupersedesDIN EN ISO 1
3、4896:2002-04www.beuth.deDocument comprises 16 pagesDIN EN 14896:2009-07 2 National foreword This standard has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics”, (Secretariat: NBN, Belgium) The responsible German body involved in
4、 its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Technical Committee NA 054-02-01 AA Hrtbare Harze. During work on the revision of this standard the German experts made recommendations regarding the following subclauses which, however, could not be incorporated at
5、 this time: The following paragraph should be added to clause 1: Considering the precision of these methods, the isocyanate content determined using them cannot be used to characterize purity (or main component content) of refined TDI and methylene-bis-(4-phenylisocyanate) (MDI) because industrial p
6、roducts normally only contain traces of secondary components, the isocyanate content of which is similar to that of the main component. In subclause 12.1.8, third paragraph, the use of a mixture of 2-propanol and ethylene glycol (1:1, v/v) should also be allowed. The following should be added to the
7、 fifth paragraph of subclause 12.1.8: In the case of toluene diisocyanate, methylene-bis-(4-phenylisocyanate), and polymethylene polyphenyliso-cyanate, if the sample is sufficiently soluable it may be dissolved directly in the dibutylamine solution without the addition of any other solvent. The DIN
8、Standards corresponding to the International Standards referred to in this document are as follows: ISO 385 DIN EN ISO 385 ISO 648 DIN EN ISO 648 ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN ISO 14896:2002-04 as follows: a) The standard has been editorially revised. b) Normativ
9、e references have been updated. c) Subclause 12.1.8 has been added. Previous editions DIN EN ISO 9369: 1997-08 DIN EN ISO 14896: 2002-04 DIN EN 14896:2009-07 3 National Annex NA (informative) Bibliography DIN EN ISO 385, Laboratory glassware Burettes DIN EN ISO 648, Laboratory glassware Single-volum
10、e pipettes DIN ISO 3696, Water for analytical laboratory use Specification and test methods DIN EN 14896:2009-07 4 This page is intentionally blank. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14896 February 2009 ICS 83.080.10 Supersedes EN ISO 14896:2001 English Version Plastics olyure
11、thane raw materials Determination of isocyanate content (ISO 14896:2009) Plastiques atires premires des polyurthannes termination de la teneur en isocyanate (ISO 14896:2009)Kunststoffe Polyurethanrohstoffe This European Standard was approved by CEN on 19 January 2009. CEN members are bound to comply
12、 with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management
13、 Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the off
14、icial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Sl
15、ovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN
16、 national Members. Ref. No. EN ISO 14896:2009: EBestimmung des Isocyanatanteils (ISO 14896:2009) Contents Page 1 Scope . 4 2 Normative references . 4 3 Terms and definitions. 5 4 Principle. 5 4.1 Method A 5 4.2 Method B 5 5 Application 5 6 Interferences . 5 7 Sampling 6 8 Test conditions . 6 9 Reage
17、nts 6 10 Apparatus 7 11 Method A Toluene/dibutylamine with aqueous HCI . 7 11.1 Procedure 7 11.2 Expression of results . 8 11.3 Precision and bias 9 11.4 Test report . 9 12 Method B Toluene/TCB/DBA with methanolic HCI .10 12.1 Procedure 10 12.2 Expression of results .10 12.3 Precision and bias.11 12
18、.4 Test report .12 DIN EN ISO 14896:2009-07EN ISO 14896:2009 (E)2Foreword. 3 Foreword This document (EN ISO 14896:2009) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. This European
19、 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2009, and conflicting national standards shall be withdrawn at the latest by August 2009. Attention is drawn to the possibility that some of the elements
20、of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 14896:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following c
21、ountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
22、Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 14896:2009 has been approved by CEN as a EN ISO 14896:2009 without any modification. DIN EN ISO 14896:2009-07EN ISO 14896:2009 (E)3SAFETY STATEMENT Persons using this document should be familiar with normal laborat
23、ory practice, if applicable. This document does not purport to address 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 Scope This lntern
24、ational Standard specifies two methods for the measurement of the isocyanate content of aromatic isocyanates used as polyurethane raw materials. Method A is primarily applicable to refined toluene diisocyanate (TDI), methylene-bis-(4-phenylisocyanate) (MDI) and their prepolymers. Method B is applica
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